APS — auxiliary static converters (SIV) for rolling stock: two- and three-level inverters and DC/DC link, 36–260 kVA
Auxiliary power supplies (APS, static inverters) convert the voltage of the overhead contact line or traction transformer into the voltage for the car’s own needs: lighting, air conditioning, compressors, doors, battery charging and control circuits.
- Circuit
- two- or three-level IGBT/SiC inverter; leakage-reactance transformers; dry capacitors; high-frequency DC/DC link (Shinkansen, LRV, APM)
- Redundancy
- parallel synchronous operation or hot standby
- Example (metro)
- 1500 V DC; three-level PWM direct-conversion inverter; 260 kVA (with redundancy); output 3-phase 440 V 60 Hz; underfloor
- Example (tram)
- 600 V DC; two-level with high-frequency isolation; 36 kVA; output 3-phase 220 V 60 Hz and 24 V DC; roof-mounted
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Auxiliary power supplies (APS, static inverters) convert the voltage of the overhead contact line or traction transformer into the voltage for the car’s own needs: lighting, air conditioning, compressors, doors, battery charging and control circuits. The company produces inverters and converters with variants by power, redundancy method and place of installation. The power part is built in a two- or three-level scheme on IGBT modules with low losses and high permissible voltage, or on SiC modules; leakage-reactance transformers and dry capacitors provide compactness, low mass and reliability. To increase availability, parallel synchronous operation of several converters or hot standby can be chosen. For Shinkansen, LRV and APM systems a scheme with a high-frequency DC/DC link is used, which further reduces mass and dimensions. Cooling is natural or forced; the housing is either long (with a separately installed fast-acting circuit breaker and transformer and filter unit) or common with integrated switching devices. Examples of versions: an underfloor converter for 1500 V DC urban lines based on a three-level PWM direct-conversion inverter of 260 kVA with hot standby and output 3-phase 440 V 60 Hz; a roof-mounted converter for a low-floor tram (600 V DC) with high-frequency isolation of 36 kVA, outputs 3-phase 220 V 60 Hz and 24 V DC, with built-in circuit breaker, fuse, contactor, transformer and filter; an underfloor converter with forced cooling for high-speed lines, fed by single-phase 400 V 50 Hz from the traction transformer, of 65 kVA plus 20 kVA of an auxiliary transformer, with outputs of 100 V DC and stabilized 100 V AC. A remote monitoring terminal for the condition-based maintenance system can be built into the converter. The equipment is an analog of onboard static converters and auxiliary machines (motor-generators, phase splitters) of earlier generations of rolling stock.
Technical specifications
| Circuit | two- or three-level IGBT/SiC inverter; leakage-reactance transformers; dry capacitors; high-frequency DC/DC link (Shinkansen, LRV, APM) |
|---|---|
| Redundancy | parallel synchronous operation or hot standby |
| Example (metro) | 1500 V DC; three-level PWM direct-conversion inverter; 260 kVA (with redundancy); output 3-phase 440 V 60 Hz; underfloor |
| Example (tram) | 600 V DC; two-level with high-frequency isolation; 36 kVA; output 3-phase 220 V 60 Hz and 24 V DC; roof-mounted |
| Example (high-speed) | single-phase 400 V 50 Hz (from traction transformer); DC/DC link; 65 kVA + 20 kVA (auxiliary transformer); output 100 V DC, single-phase 100 V |
| Cooling | natural or forced |
Request a price and lead time
APS — auxiliary static converters (SIV) for rolling stock: two- and three-level inverters and DC/DC link, 36–260 kVA. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
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