There are two suspension methods for the traction machine of electric equipment

There are two suspension methods for the traction machine of electric equipment:

1. One is the suspension method in which the traction motor and the moving wheel shaft are connected, which is called axle-holding suspension or semi-suspension. When using this suspension method, the impact vibration generated by the driving wheel through the rail gap and the switch will be directly sent to the traction motor. The shaft-holding suspension is suitable for rolling stock with a construction speed of less than 120 km/h. The other is frame-supported suspension (or full suspension). When this suspension method is adopted, the traction motor is fixedly suspended on the bogie frame, and various flexible connecting components are added between the shaft end of the traction motor and the small and large gears to reduce the impact of shock vibration. The frame-supported suspension is suitable for rolling stock with a construction speed higher than 120 km/h;

2. When the traction transformer is used to lower the blood pressure and the power supply system is supplied to the DC series excitation traction motor after the silicon rectifier or high-power thyristor transformer, the working voltage added to the traction motor is a pulsating working voltage, so this type of traction motor is called pulse current traction motor. The "commutation" criteria for power pulse current traction motors are more difficult. In addition, there are some extra losses inside the motor, which will cause the temperature of the motor. Therefore, the design and structure of the pulse current traction motor must also adopt certain special measures to deal with the two prominent problems of "commutation" and temperature. problem.

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