The embodiment of the invention provides a permanent magnet traction system. The permanent magnet traction system comprises a permanent magnet motor. The traction converter is connected with the permanent magnet motor; the traction converter comprises a pre-charging loop, a four-quadrant rectification module, a supporting capacitor, a discharging resistor, a grounding detection loop, a chopping loop and a three-phase inverter. The pre-charging loop is connected with the three-phase inverter through the four-quadrant rectification module, the supporting capacitor, the discharging resistor, the grounding detection loop and the chopping loop in sequence; the three-phase inverter is connected with the permanent magnet motor through a three-pole isolation contactor; when the permanent magnet traction system works at a high speed, in the process that the three-pole isolation contactor is not completely disconnected, the three-phase inverter is controlled to be subjected to flux weakening to restrain back electromotive force, and back electromotive force recharge is avoided.
本申请实施例提供的一种永磁牵引系统。该永磁牵引系统包括永磁电机;牵引变流器,所述牵引变流器与永磁电机连接;其中,所述牵引变流器包括:预充电回路、四象限整流模块、支撑电容、放电电阻、接地检测回路、斩波回路以及三相逆变器;所述预充电回路依次通过所述四象限整流模块、所述支撑电容、所述放电电阻、所述接地检测回路和所述斩波回路与所述三相逆变器连接;所述三相逆变器通过三极隔离接触器与所述永磁电机连接;其中,在永磁牵引系统工作在高速时,在所述三极隔离接触器未完全断开过程中,控制所述三相逆变器弱磁抑制反电动势,避免反电动势回灌。
Permanent magnet traction system
一种永磁牵引系统
2025-02-28
Patent
Electronic Resource
Chinese
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