Transportation Systems

Auxiliary power supply

The auxiliary power supply (static inverter) converts the power for interior light, displays, air conditioning, etc.
Even though there is a propulsion inverter, the static inverter is installed in order to supply power that has low voltage and constant frequency.
The propulsion inverter provides for smooth ride comfort while the static inverter provides for interior comfort.

Features

  • High reliability, compact, lightweight: This is a high-frequency, pulse width modulation (PWM) inverter with a reduced number of components.
  • High efficiency: Direct conversion using single-step conversion of input power to output power.
  • Improved maintenance efficiency: Comes standard with a device monitor to provide for self-diagnostics to help pinpoint the location of failures.
  • Parallel synchronous operations: Multiple auxiliary power units linked together for synchronous operations, whereby providing redundancy to maintain operations even in the event that a single auxiliary power unit should fail
  • Standby redundant system operation: All the major points in the control circuit, from the input breaker to the inverter, are redundant, making it possible to switch systems in the event of a failure.

Major Products

Natural cooling APS

Mounting location Under floor
Enclosure shape Long enclosure type
(high speed circuit breaker, transformer and filter are installed separately)
Application Suburban trains, commuter trains, subways
Specification
sample
Method Direct conversion PWM inverter
Line voltage 1500 V DC
Rated output capacity 150 kVA
Output type 3-phase 200 V AC 60 Hz
Mounting location Under floor (low floor compatible)
Enclosure shape Integrated enclosure (transformer filter equipment built-in; high-speed circuit breaker and rectifier are installed separately)
Application Suburban trains, commuter trains, subways
Specification
sample
Method Direct conversion PWM inverter
Line voltage DC 1500 V
Rated output capacity 120 kVA
Output type 3-phase 200 V AC 60 Hz, 100 V DC

Forced-cooling APS

Mounting location Under floor
Enclosure shape Integrated enclosure
(auxiliary transformer built-in)
Application Shinkansen
Specification
sample
Method High frequency DC/DC link method
Line voltage Single-phase 400 V AC 50 Hz
Rated output capacity 65kVA + 20kVA (auxiliary transformer)
Output type 100 V DC, single-phase 100 V AC (constant voltage),
single-phase 100 V AC (auxiliary transformer output)
Mounting location Roof
Enclosure shape Integrated enclosure
(inverter switch, inverter fuse, inverter contactor transformer filter device built-in)
Application Low-floored LRVs
Specification
sample
Method Direct conversion PWM inverter
Line voltage 600 V DC
Rated output capacity 45 kVA
Output type 3-phase 440 V AC 60 Hz, 24 V DC

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