增大高速区电制动力的方法

Increasing Electrical Brake Force in the High-Speed Range

针对现有电力机车高速区电制动力下降,导致车辆维修费用增加问题,提出了2种解决办法,即在牵引逆变器和电机绕组间串接电阻或电容,来提高电制动力和改善功率因数,并从理论和实践的角度作了充分的论证。对电阻短路时引起的电流和转矩变动进行了试验分析,并提出了解决方法。

In view of dropping of electrical brake force of the electric locomotive in the high-speed range, which causes increase of maintenance cost of rolling stock, two methods of solution are given, i.e., insert rheostats or capacitance between the inverter and traction induction motor to increase the electrical brake force and power factor. The demonstration is made fully from the theoretical and practical aspects. The variation of currents and torque caused by short circuit of resistance is tested and analyzed, and the method of solution is put forward.