ENI-FL40/DBC Inverter

Falownik ENI-FL40/DBC
Falownik ENI-FL40/DBC



The ENI-FL40/DBC inverter is intended to supply electrical power to the compressor/fan motors installed in the auxiliary circuits of shunting and similar diesel-electric locomotives. The inverter is fed with the output voltage from the onboard auxiliary generator rectified by an auxiliary rectifier.


 Supply voltage  580 VDC ± 20%
 Control input voltage  24 VDC ± 30%
 Rated output voltage  3 x 400 VAC / 50 Hz
 Voltage output pulsing  ≤ 2%
 Rated power output  40 kVA
 Maximum load current  58 ARMS
Electronic output overvoltage and shorting protection
CAN / CAN Open control system
 Ambient operating temperature  -30°C to +40°C
 Cooling  forced
 Protection rating  IP 54
 Size [L x W x H]  490 x 459 x 402 mm


The rectifier electrical circuitry is installed in a hermetic and durable aluminium enclosure, finished by powder coating. The enclosure houses the following:

  • The back wall carries a high-efficiency heat sink with 3 units of double IGBT power modules, configured into a 6T three-phase AC inverter; the heat sink provides effective cooling of the power processing components with ambient air,
  • The left hand wall carries a TS35 mounting rail with connection terminals interfaced with the vehicle onboard systems,
  • The back wall features sealing glands for the connection lines of the onboard systems.

The removable front panel grants service access to the inverter interior. The enclosure corners are fitted with four ø11 openings for mounting the device to the vehicle frame.


The input voltage is supplied from the locomotive auxiliary rectifier output to the power input terminals; the current draw is measured/monitored with a current sensor. The input capacitors isolate the voltage in downstream power lines from interference and transient variations. The DC to 3-phase AC converter section is a three-phase TD bridge, comprising high-current double IGBT power modules, installed on a high-efficiency heat sink. The line current output sensors protect the AC inverter circuitry against overcurrent and shorting of the compressor/fan lines in the onboard systems. The power line installed on the heat sink is cooled with an ambient air stream, forced by two fans at the heat sink bottom. The heat sink over temperature protection is a temperature sensor, the output signal of which is monitored by the control system. The inverter is controlled and monitored over CAN/CAN Open.


schemat blokowy falownika ENI-FL40/DBC

Power kW
Input voltage
580 VDC
Output voltage
3 x 400 VAC

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