Automated Systems And Complexes News Site map Russian
General Information
Customers (referens-list)
Partners
Licenses and certificates
Management
Company products

 

The specialists of “Automated systems and complexes” develop and produce in-house custom-made products, such as:
  • Converters for soft start of induction and synchronous motors with voltage of 3, 6, 10 kV and power of 0,15...12,5MW. (Conformance certificate No. ROSS RU.AU16.HO3944) (go to)
  • Welding transformer open-circuit voltage limiter; (Now efforts are made on facultative certification of welding transformer complete safety device limiter).(go to) 
  • Traction converters for electric transport. (Certificate for utility model No. 10957).  (go to)
  • Electric drive of new generation on basis of double-link direct frequency converter. (go to)
  • Automated converter for electrolyzer of hydrogen plant (go to)
  • Static exciters of VSP-315 series (go to)
  • Water (air)-cooled DC converter (go to)
  • On-board computer “SKAT-4” (go to)

  

High-voltage thyristor voltage converters for soft start of induction and synchronous electric drives

 
Application of converters resulted in:
  • significant decrease in motor starting current, with its value limited to the level of 2-4 rated motor stator currents;
  • significant reduction of dynamic overloads in power transmission kinematic loops: coupling, gearbox, etc.;
  • reduction of electromagnetic forces in motor stator windings, and, as a consequence, increase of stator lifetime;
  • improvement of service conditions of associated electric facilities: switching units, transformer, cable lines;
  • significant reduction in electric losses in power-supply system of the enterprise by motor start-up;
  • reduction of voltage dips in the mains by motor start-up;
  • on the whole, soft-start system ensures reliability growth and increase in lifetime of manufacturing equipment.
 Converters offer a number of additional features:
  • generation of desired trajectory of motor stator voltage or current variation in time function;
  • control of external switchgear and excitation system;
  • measurement and indication of voltage, current, power and energy of electric motor;
  • automatic voltage and current boost by abortive start;
  • safety interlock to protect against erroneous actions of maintenance staff;
  • wide set of parameters, enabling configuration management for vast range of applications;
  • output of detailed status information to the display;
  • integrated PROFIBUS or MODBUS data communications module, which ensures safe integration into process control system.
 
Converters possess a rich array of protections and diagnostics:
  • unbalance protection, protection against mains voltage deviations;
  • instantaneous electronic overcurrent protection;
  • protection against rectifying behavior of converter;
  • protection against gate section unbalance;
  • protection against overheating and venting deterioration of thyristor power  module.
 
 Basic technical characteristics:

Rated motor voltage, kV
3; 6; 10
Motor power range, MW
0,15 ... 12,5
Output voltage control range, %
0 ... 100
Max. starting current ratio
3,5
Supply voltage of control circuits, V
~1...220<
Number of successive start-ups at max. current
5 (after 10 min break)
Adjustable start-up time, sec
5 ... 250
Degree of protection as per GOST 14254
IP31
Climatic embodiment as per GOST 15150
ÓÕË

 
For implementation of group soft start system there are developed and produced dedicated high-voltage motor selection cells, based on vacuum contactors.
Information about semi-conductor converters for soft start of high-voltage induction and synchronous motors can be found in register of “AK “Transneft”.
 
   Reference list 

Description
Technical characteristics
Time and place of installation
Converter of 80- 3k type for soft start system of induction motor of sinking pump
Voltage – 3 kV
Power – 250 kW
Natural air cooling
Pump station, “Novo-kluchevskaya” mine, OJSC “Uralelectromed”
July, 2006
Converter of 200-6k type for group soft start system of three synchronous motors of turbine compressors
Voltage – 6 kV
Power – 1600 kW
Natural air cooling
Compressor station,
“Severopeschanskaya” mine,
OJSC “Bogoslovskoe rudoupravlenie”
December, 2006
Converter of 200-6k type for group soft start system of three induction motors of gas-cleaning system fans
Voltage – 6 kV
Power – 1700 kW
Natural air cooling
Gas-cleaning system
OJSC ”Severskiy tube plant” October, 2008
Converter of 250-10k type for group soft start system of five synchronous motors of turbine compressors
Voltage – 10 kV
Power – 3200 kW
Natural air cooling
Compressor station of Tajik aluminum plant
August, 2008
Converter of 80-3k type for soft start system of induction motor of sinking pump
Voltage – 3 kV
Power – 250 kW
Natural air cooling
Pumping station of “Novaya” mine
OJSC “Uralelectromed”
July, 2008

  

Converter of 200-6k type for group soft start system of two synchronous motors of turbine compressors
Voltage – 6 kV
Power – 1600 kW
Natural air cooling
Compressor station of “Yuzhnaya” mine
OJSC “Visokogorskiy ore-dressing and processing enterprise”
Start-up, November, 2008
Converter of 200-6k type for soft start system of synchronous motor of turbine compressor
Voltage – 6 kV
Power – 1600 kW
Natural air cooling
Compressor station of
“Estuninskaya” mine
OJSC “Visokogorskiy ore-dressing and processing enterprise”
Start-up, November, 2008
Converter of 250-10k type for group soft start of three induction motors of pumping units
Voltage – 10 kV
Power – 2100 kW
Natural air cooling
Pumping station
Oil pipeline Eastern Siberia – Pacific ocean
AK “Transneft”
Start-up, April, 2009
Converter of 100-10k type for group soft start system of two induction motors of pumping units
Voltage – 10 kV
Power – 550 kW
Natural air cooling
Pumping station
Oil pipeline Eastern Siberia – Pacific ocean
AK “Transneft”
Start-up, April, 2009
Complete converter of 100-6k type for individual soft start of induction motor drive of pusher pump
Voltage – 6 kV
Power – to 1000 kW
Forced air cooling
Pump-and-accumulator stations of hydraulic presses
OJSC “VSMPO-AVISMA”
Delivery 37 pcs., 2008-2009

 
 Engineering data for converters:

TYPE
 
80-3k
160-3k
250-3k
125-6k
250-6k
400-6k
630-6k
800-6k
1250-6k
125-10k
250-10k
400-10k
630-10k
800-10k
Mains rated voltage, KV     
3AC (+20% / -20%), 50 Hz
3
3
3
6
6
6
6
6
6
10
10
10
10
10
Rated power, KW
315
630
800
1000
2000
3150
5000
6300
10000
1600
3150
5000
8000
12500
Rated output current, A
80
160
250
125
250
400
630
800
1250
125
250
400
630
800
Max. output current, A       
350
550
750
500
700
1200
1900
2400
3700
500
700
1200
1900
2400
Converter efficiency, %
Not less than 98
Control circuit voltage, V
1AC 220V (+15% / -20%); Ií= 3A or 220 V DC (+15% / -20%); Ií= 3A
Output voltage control range, %
From 0 to 100
Start-up time control range, C
From Î to 180
Operating conditions
S2. Two successive starts at max. current; subsequent break 10 min.
Operating ambient temperature, 0Ñ
From +1 to +45 at rated load
Storage and transportation temperature, 0Ñ  
From -50 to +40
Installation altitude above sea level
Not more than 1000 m
Relative air humidity
Not more than 90 % at +20 0Ñ
Degree of protection
IP31
Dimensions (HxWxD), mm
2200x800x600
2400x800x800
2400x2400x800
2400x3000x800
2400x1000x800
2400x2400x800
2400x3000x800
Weight, kg
300
350
400
450
900
900
950
1000
1100
450
1000
1050
1100
1200
Options:
Six digital inputs
24V, 15mA internal supply
Three digital outputs
24V, 100mA internal supply
Eight analog inputs
±10V/Pt100
Two analog outputs
±10V, 20mA

Engineering data for motor selection cells:

TYPE
400-10k
630-10k
800-10k
1250-6k
Mains rated voltage, kV
3AC(+20% / -20%), 50Hz
10
6
Rated power, kW
5000
8000
12500
10000
Rated output current, A
400
630
800
1250
Max. output current, A
1200
1900
2400
3700
Control circuit voltage, V
1ÀÑ 220V (+15% / -20%); Ií=3A or 220V DC (+15% / -20%); Ií=3A
Operating conditions
S2. Two successive starts at max. current; subsequent break 10 min.
Operating ambient temperature, °Ñ
From +1 to +45 at rated load
Storage and transportation temperature, °Ñ
From -50 to +40
Installation altitude above sea level
Not more than 1000m
Relative air humidity
Not more than 90% at +20 °Ñ
Degree of protection
IP 31
HxWxD
2400õ800õ800
2400õ1000õ800
Weight, kg
350
370
400
430

CJSC “Automated systems and complexes” (“ASC”) is also prepared to develop and produce customer-specific soft-start systems.
Additional information can be obtained from our chief designer on energy-saving equipment, candidate of technics, Tkachuk Andrey Alexandrovich.
620137, Russia, Ekaterinburg, P/O 343,  Studencheskaya str.,1-D
Telephone: (343)360-05-01 ext. (1079), fax: (343)341-37-05

 

 

Welding transformer combined protection device



The device is intended for execution of welding under AC conditions (safe, energy-saving, easy-to-use). 

 Welding transformer combined protection device performs the following functions:
  • welding transformer no-load voltage limitation to a value, not exceeding 6 V;
  • noncontact welding transformer tripping off the mains 0,5 sec after arc-breaking;
  • safe full voltage feed to welding circuit after electrode contact with component part;
  • operation at mains voltage 220, 380 and 500 V and welding current up to 600 A;
  • diagnostics of welding circuit before and during welding;
  • overcurrent protection of welding transformer;
  • measurement of welding current;
  • diagnostics of correctness of device connection.
Welding transformer combined protection device has protection class IP53, dimensions 400x200x185 mm, weight 12 kg.
Welding transformer combined protection device is designed to fulfill a number of functions, the two of which can be treated as basic ones.

The first function – voltage limiting at output terminals of welding circuit to a value, not exceeding 12 V of effective voltage, at the latest 1 sec after welding circuit opening (as per GOST 12.2.007.8 – 75).

The second function – energy saving during execution of AC arc welding with stick electrodes.

 
Welding transformer combined protection device ensures electrical safety by execution of welding in risk-bearing environment. It excludes shock hazard during electrode replacement by a welder and casual touching of conductive parts of welding circuit by a welder or people within the area of welding zone.

Welding transformer combined protection device, as well as welding transformer no-load voltage limiters, is an auxiliary means of electric shock protection and is to be used in compliance with GOST 12.3.003 – 86 and requirements of GOST 12.1.004 – 91, GOST 12.1.010 – 76, GOST 12.2.007.8 – 75, GOST 12.3.002 – 75.

 
Performance specification

No.
Parameter description
Unit
Value
1
Rated supply main voltage
V
220; 380; 500
2
Supply frequency
Hz
50
3
Acceptable supply main voltage variation
%
± 10
4
Rated welding current
A
up to 500
5
Maximum welding current
A
 
600
6
Restricted voltage value at welding electrode
V
not more than 6
7
Time of full voltage feed to welding circuit after contact with electrode
sec
not more than 0,01
8
Responsiveness
Ohm
200
9
Rated duty ratio
%
100
10
Casing as per GOST 14254-80
 
 
IP53



Make-upandoperatingprinciple
The method of welding transformer no-load voltage limitation consists in the following. By connection of primary circuit of welding transformer to supply main the following parameters are measured: main voltage, voltage and current of welding circuit and temperature of thyristor switch, installed inside primary circuit of welding transformer. On basis of voltage and current data of welding circuit the welding circuit resistance is monitored: it varies from infinity (when welding circuit is open) to resistance value, corresponding to relevant welding conditions. By welding circuit resistance variation from infinity to 200 Ohm the power-frequency specific-shaped pulses are generated that ensure highly sensitive condition diagnostics. Monitoring of this range can be divided into two zones: (∞- 500) Ohm and (500 - 200) Ohm. The second zone covers the cases of human contact with welding circuit in especially hazardous environment, for example, by electrode replacement. In this case a built-in oscillator starts to generate special pulses and send them to welding circuit; effective values of pulses do not exceed 12 V. Under such conditions the pulses are sensible, although show no injury threat. Pulse scanning of welding circuit in the first and second modes is required to provide high sensitivity of the device to tarnishes and oil films on the surface of welding electrode and component part. Special pulses destroy tarnishes and films, which contributes to considerable enhancement of device reliability and facilitates welding arc ignition. By reduction of welding circuit resistance to the value lower than 200 Ohm, which corresponds to electrode contact with welded part, the signal for thyristor switch actuation is generated, and full voltage is fed to welding circuit. On the contrary, if the welding stops after a time not exceeding 1 sec, welding-circuit no-load voltage limitation takes place, and special pulses are generated with effective value less than 6 V.
One of the characteristic properties of no-load voltage limiter of welding transformer (welding transformer combined protection device) is its versatility, that is, possibility of its application for different types of welding transformers with rated welding current from 50 to 500 A and rated supply voltage from 220 to 380 V. For example, for most widely used welding transformers of TDM-201, 401, 501 type, etc. It should be noted that welding transformer combined protection device has a self-adjustment feature, that is, one does not have to perform any switching procedures or parameter adjustment when changing from one type of welding transformer to another. Therefore welding transformer combined protection device provides normal welding conditions at welding current up to 500 A and mains voltage variation from 200 to 400 V. For mains with voltage of 500 V the welding transformer combined protection devices of a special series are used.
Control system is executed on up-to-date microelectronic base with the use of single-chip microcontroller. Safety and diagnostics block follows such functional behavior of welding transformer and welding transformer combined protection device as: overheating of thyristor switch, break or short-circuit in thyristor switch or in welding transformer; faults with supply system of device control circuit; wrong connection of bonding conductors. Existence of voltage in the mains and supply of welding transformer combined protection device, emergency and operating modes of a welding transformer are indicated by means of display unit. Welding current value is shown on a digital display and is stored until the next welding session. Welding transformer combined protection device provides for capability of forced introduction of resistances into welding circuit to imitate human touch or existence of contact between welding electrode and component part. This enables checking of serviceability of device prior to commencement of welding.
Welding transformer combined protection device is portable and meets modern ergonomic, design and user-friendliness requirements. It is mounted on a side wall of transformer housing or close to it by means of a special easy-off fastener assembly. Electrical connections are executed so that they would allow of safe and quick detachment of welding transformer combined protection device from welding transformer without any tools. Metal casing of IP53 protection class enables operation of the device in strongly dusty and humid environments.
For the time being more than 50 welding transformer combined protection devices have been adopted at different plants and enterprises. Professional welders point out high sensitivity, short response time, easy arc ignition and high degree of comfort by execution of welding while working with different types of welding transformers.
 
For ordering please contact:
Boguslavskiy Alexander Mikhailovich.
Telephone: +7(343)360-05-01 ext. 1058
Fax: +7(343)360-05-01 ext. 1061

 

 

 

Traction drive converter for modernization of tram car “Tatra-3”

 
Designation:
Designed for coordinated control of four traction motors of TE–022 type, that are responsible for rotation of four wheel pairs of tram car of T3E type, which is an advanced model of T3 car (of Czech manufacture).
Traction motors are symmetrically distributed between two trucks, each truck containing two motors, connected in series. Converter performs pairwise control of traction motors, that is, power circuits of two trucks inside converter are separated.  
Critical parameters:

      
 Rated output current, A (per each truck)
 
150
 Rated output voltage, V
600
 Rated output power, kW (per each truck)
90
 Max. output current, A (per each truck)
240
 Rated power circuit supply voltage, V
600
 Permissible operating power circuit supply voltage, V
280-850
 Control system supply voltage, V                  
24
 

 
Configuration and composition:
Converter is executed as a cabinet-type one-piece assembly with horizontal operating position.
Cabinet is made by way of a metal structure of one-side service and is located under car. The inside part of converter is divided into three compartments. Its central part contains microprocessor control system, common for both trucks. On both sides of it there are two symmetrical compartments with power circuit components, each compartment for a certain truck. Each power compartment includes transistor-diode switches (on basis of IGBT transistors) and power capacitor bank. Each power circuit compartment is fitted out with air conduit, made up by heat sinks of power semiconductors. Air conduits inside cabinet are tightly sealed and isolated from semiconductor elements, thus, cabinet can be conventionally divided into “clean” and “dirty” sections.
Cabinet has forced-air cooling. Air injection into air conduits is made possible by means of motor-generator set, installed in T3 car, which also acts as a fan.  In case of exclusion of motor-generator from the car diagram (and its replacement by static converters) it is possible to mount “native” fans at dedicated locations.
Protection class IP54.
Overall dimensions 1464*836*257 (without terminal strip covers).
Weight of converter – not more than 265 kg, specific weight – not more than 1,1 kg/kW.
Converter provides for interchangeability of single-type elements.
Additionally:
Apart from converters, delivery set includes power filter chokes, brake resistors, operator panel, interposing relay unit and complete documentation package, sufficient for car retrofit with customer’s efforts.
 
Make-up and operating principle.
Each of the two power circuits (one per each truck) is energized from urban DC contact system; power supply is converted into pulses of the same amplitude and is fed to two series connected traction motors of a relevant truck.
Control system performs individual regulation of pulse ratio for each truck so that driver-defined motor torque value could be provided regardless of shafts speed.
By braking traction drives switch over to generator mode. If contact system incorporates consumers, motor-generated energy is recuperated into contact system. If contact system is not capable of consuming all recuperated energy, certain part of it is dissipated on transistors. Actuation and tripping of brake resistors is performed automatically, depending on availability of consumers in contact system. Thus converter executes regenerative-rheostatic motor braking.
Connection of two converter power circuits to traction motors and contact system is made individually for each truck by means of contactors, retained at the car, via commands of converter control system, which, in their turn, depend on driver-defined behavior and current status of controlled variables. In case of power circuit failures of one of the trucks, car will be able to move with only one truck in operation.
Switching of external power contactors is executed under no-current conditions, therefore, prior to each switching procedure the current in a switched circuit is preliminary reduced to zero value by means of semiconductor power switches.
Power supply of converter control system is implemented via embedded car network. By means of internal voltage stabilizers unstable voltage of embedded network is converted into stabilized voltages of preset level. 
Converter control is executed via relay inputs from low-voltage general car circuit.
Signals from converter to low-voltage general car circuit are transmitted via contacts of additionally mounted external relays.
Besides, converter sends analog signals to control pointer-type indicators, mounted on a driver’s console.
Converter can also output signals to optional operator panel to get textual representation of its status on a display.
If additional forced-air cooling fans are used, control system activates them only when heat sinks of power semiconductors get heated to defined level. As soon as heat sinks get cold, fans are automatically switched off.  
 
Placement, installation, mounting.
Converter is mounted under tram car in a space, left free after dismantling of accelerator and damper resistors. Converter fixing points coincide with fixing points of dismantled “accelerator”. Converter keeps control over four motors. Converter mounting is executed either with jack table, or with load lifting mechanism through roof hatch cover. Converter set includes intermediate mounting frame. 
Attachment of external connections is performed in compliance with delivered documentation package, containing detailed description of actions to be performed and their sequence. Car performance check and setting it into motion are conducted according to instructions, specified in documentation package.
 

AC traction drive converter for tram cars with induction motors.

 
Designation:
Converter is designed for coordinated control of two in-parallel traction induction motors of 225-4MU2 type or other induction motors (depending on manufacturing plant), that are responsible for rotation of two wheel pairs of one truck of a tram car, according to modes, set by a driver via control panel.
 
Critical parameters:
 

      
Rated output current, A
 
250
Max. output current, A
460
Rated output voltage, actual, V
345
Rated output power, kVA
150
Max. output power, kVA
275
Rated power circuit supply voltage, V
550
Max. operating power circuit supply voltage, V
850
Min. operating power circuit supply voltage, V
280
Min. control system supply voltage, V                  
 24
 

 
Configurationandcomposition:
Converter is made by way of a built-up structure, comprised by power block, control box and fan system.
Each block is executed as a cabinet-type metal structure.
Power block has forced-air cooling with fans.
Connection inputs of power and control circuits are sealed.
Power cable connection points are located under terminal box covers of power block.
Direction of power cable lead – from above with a bend inside terminal box.
Converter is repairable.
Converter is characteristic of one-side maintenance. Converter bottom part (in operating position) contains two cover plates.
One cover plate provides access to control system, the other – to power circuit elements.
Protection class of cabinet housing - IP54.
Converter overall dimensions – not more than 1300 *1000*350 mm.
Converter weight – not more than 170 kg, specific weight – not more than 1,13 kg/kVA.
Converter provides for interchangeability of single-type elements.
 
Make-up and operating principle.
Converter is made by way of a three-phase voltage inverter, implemented on basis of IGBT power transistors, with integrated control system and forced air-cooling fans for heat sinks of power transistors.
Through pulse-width modulation inverter transforms direct power supply voltage into three-phase symmetric system of supply voltages of traction induction motors. Frequency and amplitude of output voltage is regulated so that preset traction drive force could be provided irrespective of rotor speed. Desired force value and direction are determined by position of control elements, preset by a driver, and possible restrictions at current values of controlled variables.
Converter control is executed by a driver from car cabin by means of complex tram automation system.
Complex tram automation system is represented by on-board computer, connected to busline converter control system with RS485 interface. Converter control can also be implemented via discrete signals (without complex tram automation system).
Through external commands converter provides:
  • start-up and acceleration of traction motors with effort, proportional to assigned value;
  • car travel at max. speed 75 km/h;
  • follow-up regenerative-rheostatic braking within speed range from 75 km/h to 1 km/h;
  • automatic transfer from recuperative to rheostatic braking, if contact system does not incorporate consumers, and reverse transfer, if consumers do exist in contact system; 
  • car travel at creep speed.
In all operating modes converter ensures skid and slid protection and transmits status signals to driver’s cabin for subsequent visualization.
Converter provides control of traction motors under all traffic conditions without the need for rotor speed transducers.
Power supply of converter control system is implemented via embedded car network. By means of internal voltage stabilizers unstable voltage of embedded network is converted into stabilized voltages of preset level. 
“Ready” signals are transmitted from converter to low-voltage general car circuit via internal relay contacts.
Forced air-cooling fans are actuated by control system when heat sinks of power semiconductors get heated to defined level. As soon as heat sinks get cold, fans are automatically switched off.
 
Placement, installation, mounting.
Converter is mounted under tram car. Converter design allows of converter placement on the car roof without the need for any means of additional precipitation protection.
Tram car design 71-405 includes two converters – individual traction drive package is installed for each of the two trucks.
Since converter is integrated into electric equipment of the car, its installation and mounting are to be executed in compliance with car operating manual.
Attachment of external connections is performed in compliance with car diagrams.
 
Additional equipment.
Apart from traction converters delivery set can include:
  • Buffer cubicle, ensuring coordination of converter with contact system;
  • Heater switch cubicle, ensuring contactless control of tram car heating elements:
  • Power brake control cabinet, ensuring contactless control of solenoids of tram truck power brakes;
  • Complex tram automation system, mentioned above;
  • Operator panel OP-300, enabling current status display of controlled variables both of the car and converter, as well as scanning of events and time of their occurrence, stored in nonvolatile memory.
   
 
We perform service and repair of equipment for electric transport traction drive.
 
For more information please contact:
Manilov Oleg Arkadyevich,
Tel.: +7 (343) 360-05-01 ext. 1110.
Fax: +7 (343) 341-37-05

  

 

Industrial energy-saving controlled-velocity induction motor drive of a new generation based on double-link direct frequency converter

The specialists of “ASC” enterprise have completed innovative development of a new-generation industrial  energy-saving  AC induction motor drive of a wide adjustment range.
Highly-innovative configuration of transistor double-link direct frequency converter with microprocessor control system was utilized and brought to the stage of industrial application to demonstrate new power characteristics of electric drive. As compared to similar traditional double-link converters, a new converter configuration does not include a bulky power smoothing filter in intermediate DC link, which contributes to significant improvement of its weight and dimensioning characteristics.
Two-stage coordinate strategy of frequency converter control in electric drive system was developed for control of double-link direct frequency converter. In the framework of this strategy the algorithm of power switch control with PWM, adapted to a new configuration of converter power circuit, was developed and patented.
 
CONVERTER CONTROL OBJECTIVES
Investigation of properties of double-link direct frequency converter with PWM allowed to define the following objectives of frequency converter control in variable-frequency electric drive system:
  • generation of target values of useful component of output voltage with maximum utilization of capabilities of double-link direct frequency converter as a high-quality AC motor power supply;
  • stabilization of transfer ratio of double-link frequency converter as a component of automatic drive control system;
  • adjustment of reactive power input of double-link direct frequency converter as a component of power-supply system;
  • provision of electromagnetic compatibility of double-link direct frequency converter with mains and load.
 
DRIVECONTROLSYSTEM
There was developed automatic vectorial two-band drive control system, ensuring attainment of normalized quality indexes of static characteristics and electromechanical transients of electric drive under conditions of frequency start-up, regenerative braking and sensorless speed control alongside with enhanced quality indexes of electric drive as a power consumer.
 
APPLICATION
Commercial prototypes of a “new generation” electric drive with squirrel-cage motors of power 110 kW are successfully used in the capacity of master drive of surface planing machine 7À256 at “VSMPO-AVISMA” corporation in the town of Verkhnyaya Salda.
Safe performance of double-link frequency converters over a period of 2 years has proved that a new converter configuration can be successfully applied to AC drive systems and ensure highly effective energy consumption and electromechanical transformation. Owing to normalized electromechanical properties, typical of auxiliary control systems, electric drive with double-link direct frequency converter is distinctive of improved power- and electromagnetic compatibility with supply main, which ensures harmonicity of input and output currents, double-end energy-efficient active power exchange under starting-braking conditions, as well as regulation of reactive power consumption.
Recommended application field for a new “development” – highly-dynamic electric drives of machines with heavy starting-breaking operating modes in case of enhanced quality requirements to energy consumption and controlled electromechanical transformation.
 
 

Automated converter for electrolyzer of hydrogen plant

Nowadays gaseous hydrogen is widely applied in metallurgy, power engineering, food, chemical and other industries to meet the needs of industrial process. In industrial environment the hydrogen is normally obtained through electrolytic dissolution of water into hydrogen and oxygen components. For this end a DC source is required that feeds an electrolysis plant. 

Automated converter for electrolyzer of hydrogen plant is intended for conversion of ac main voltage into direct voltage, regulated by effective value. The converter is used as a variable power supply of electrolysis plant with preset current stabilization.
Power circuit of converter is comprised by required quantity of in-parallel power modules.  The number of modules to be installed into converter depends on output current. The power modules have been designed according to multistage circuit. At first three-phase main voltage is converted into direct one by means of three-phase bridge rectifier. Then direct voltage is inverted into high-frequency ac voltage by means of transistor chopper, after which it is lowered to required level via pulse transformer. Transformer secondary voltage is rectified to direct voltage by frequency diodes. Despite multiple energy conversion, the system has high energy indicators and low weight- and dimensioning indexes. Owing to inverter’s pulse-width modulation a converter sustains output current value of desired accuracy.
Cooling system is double-loop. Semiconductor devices within internal closed loop have forced liquid cooling. A special heat-transfer agent is circulating inside loop, forced by centrifugal pump, which is cooled in a heat exchanger. Heat exchanger is purged with outdoor air through centrifugal fan. Liquid cooling loop is sealed. Heat-transfer agent does not freeze, it has corrosion-inhibiting properties and meets the required hydro- and thermal requirements.
Converter’s parameter definition, output of fundamental values and display of status are implemented via built-in operator panel. Operator panel is graphic, coloured, touch pad. Parameter setting and variation are executed “on-line” in Russian language.
Integration into upper level system is implemented via integrated protocols Modbus and Ethernet.
 
Application field  
  • Automated converter for electrolyzer of hydrogen plant is applied in 3-phase AC mains with voltage up to 400 V;
  • power-supply system may have either solidly grounded or insulated neutral;
  • can be used in different industrial fields – metallurgy, power engineering, food industry, chemical industry, etc.
 Main distinctive features 
  • local manual or remote control;
  • indication of output current, voltage, power, energy, leakage current values on digital display;
  • nonvolatile real-time clock and calendar for converter failure logging;
  • freely configurable discrete inputs and outputs;
  • freely configurable analog inputs and outputs that can be connected to indicators.
 Protective features and diagnostics 
  • protection of power converter against overcurrents, overload, switching surges, overheating and earth faults;
  • protection against mains over- or undervoltage, unsymmetry and open-phase operating mode;
  • diagnostics of logics and power converter prior to and during converter operation;  
  • individual control of thermal and electric features of semi-conductor devices;
  • insulation monitoring and measuring of leakage current from dc buses to earth.
 Design                                                                 
  • the product is implemented by way of a single cabinet;
  • forced air cooling, air intake filters mounted at the back wall, air outlet through slots under roof;
  • controls located on cabinet door  
Additional information can be obtained from our chief designer on energy-saving equipment, candidate of technics,
Tkachuk Andrey Alexandrovich.
620137, Russia, Ekaterinburg, P/O 343,  Studencheskaya str.,1-D
Telephone: (343)360-05-01 ext. (1079), fax: (343)341-37-05
 

 

Static exciters of VSP-315 series

Static semiconducting exciters of VSP-15 series are intended for feed of field windings of 3-phase synchronous motors with brush-type excitation. The exciters are produced in compliance with requirements of GOST 24688-81 “Static semiconducting exciters for three-phase synchronous motors. General technical requirements”.

Field of application
 
The exciters can be applied in metal, chemical and other industries, housing and public utility sector and in power engineering.
 
Main distinctive features 
  • compatibility with systems of direct, reactor and soft start;
  • local control, remote control through discrete signals or via PROFIBUS link;
  • communication of information on performance characteristics of synchronous motor via PROFIBUS link;
  • microprocessor control system;
  • natural air cooling;
  • at customer’ request can be complemented with power transformer.
 Basic functions 
  • automatic connection of starting resistance during acceleration of synchronous motor;
  • automatic feed of excitation current after acceleration of synchronous motor is finished;  
  • automatic stabilization of excitation current;
  • cos φ adjustment;
  • automatic forcing of excitation current in case of reduction of supply voltage of synchronous motor;
  • accelerated field suppression by synchronous motor shutoff;
  • protection against internal and external short circuits, exciting circuit chassis fault and asynchronous running.
 Construction 
  • exciters are produced by way of cabinets;
  • exciters are designed for operation with external power transformer;
  • connections of power circuits and control circuits in the bottom part of cabinet;
  • measuring devices, controls and indicators located on cabinet door;
  • natural air cooling;
  • IP20 protection rating.

Additional information can be obtained from our chief designer on energy-saving equipment, candidate of technics,

Tkachuk Andrey Alexandrovich.
620137, Russia, Ekaterinburg, P/O 343,  Studencheskaya str.,1-D
Telephone: (343)360-05-01 ext. (1079), fax: (343)341-37-05

  

Water (air)-cooled DC converter.

 

Converter rectification circuit is a 12-pulse one, implemented with two three-phase thyristor bridges (thyristors of “Semikron” manufacture). Each thyristor bridge is water (air)-cooled, protected on the input side by overvoltage protective device.  Control system of each bridge is implemented on basis of Simoreg CM device of ”Siemens” manufacture. Control units are connected with each other according to “master-slave” principle. Converter provides for possibility of operation for two armatures in parallel. In view of this it is equipped with two exciters and two emf regulators that allow to reach load balance between armatures during converter operation. Load balance regulator, speed controller and process regulators are represented in master device. Besides, both master and slave devices include current loop of relevant thyristor bridge. Controls (switches and buttons) for high-voltage circuit breaker (converter supply) and current-limiting circuit breakers (thyristor bridge protection), as well as indicators of basic parameters of electric drive (armature and field currents, voltages) and status indication lamps for a-.-m. switchgear are located on the doors of converter. Communication of converter and master device is executed via Profibus DP. All necessary protections are implemented in thyristor bridge control units (protection against overcurrents, overvoltages, excessive emf, speed, insulation deterioration, thyristor overheating, etc.). Converter is comprised of five cabinets: two cabinets for power gate sections, two control cabinets and one cabinet for overvoltage protection units.
 
 

On-board computer “SKAT-4”

 

SKAT – Complex automation system for tram
 
On-board computer “SKAT-4” is designed to control the equipment of tram car of 71-405 model and perform its diagnostics in all operating modes, as well as to provide a tram driver with all necessary data on operation of electric and other equipment (fitted out with condition sensors) under normal and emergency conditions.
 
 
Main functions of “SKAT” system
  • monitoring the parameters of overhead contact system;
  • job setup for traction drives;
  • ensuring a matched operation of traction drive, rail and power brakes in braking mode;
  • protective functions;
  • diagnostics of tram condition;
  • gathering and display of travel information;
  • control of auxiliaries.

 

For more information please contact:
Manilov Oleg Arkadyevich,
Tel.: +7 (343) 360-05-01 ext. 1110.
Fax: +7 (343) 341-37-05