Abstract
Auxiliary machines of electric trains provide the operation of traction motors and electrical and pneumatic equipment. The main condition of safe operation of the asynchronous electric drive of auxiliary machines is the maintenance of the operation mode of the electric drive in terms of the basic technical data, according to which NVA-55 electric drives are matched by nominal operation (long-term) mode S1. The effect of supply voltage on the operation of locomotive auxiliary machines is considered. Auxiliary machines are used under poor conditions on alternating current electric trains. Disbalance of the motor currents occurs even at nominal voltage of the overhead contact system and operable phase-shifting device. In operation, the voltage on the contact wire line is not constant and the equipment modes can be inconsistent with the nominal one, which leads to a significant number of failures of auxiliary equipment. This makes it necessary for the microprocessor control system to use the controlled auxiliary electric drive. An individual autonomous inverter with fully balanced sinusoidal output voltage allows one to increase the reliability of the induction motor drive, while the proportional control of the blower motor reduces the power consumption.
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