The invention discloses a high-power permanent magnet direct-drive freight locomotive traction converter, and relates to the field of locomotive traction converters. The converter comprises two groups of independent traction main loops, wherein each group of traction main loops comprises a pre-charging loop, a four-quadrant power module, a four-quadrant chopping power module, an independent intermediate direct-current circuit, a traction inversion power module and a three-pole isolation contactor; the electrical principles and structures of the two traction main loops are completely the same. Each intermediate direct-current circuit comprises an energy storage circuit and a measurement and protection circuit; each energy storage circuit is used for stabilizing the voltage of an intermediate loop, each measurement and protection circuit is composed of a grounding measurement circuit, an intermediate voltage sensor and a voltage detection board, and a three-pole isolation contactor is arranged between the traction inversion power module and a permanent magnet synchronous motor. And each three-pole isolation contactor is connected with a three-phase traction inverter INV2 and a permanent magnet synchronous motor through copper bars. The problem that a traction converter of a high-power freight electric locomotive cannot be directly applied to a permanent magnet direct-drive electric transmission system is solved.
本发明公开了一种大功率永磁直驱货运机车牵引变流器,涉及机车牵引变流器领域。该变流器包括两组独立的牵引主回路,每组牵引主回路包含预充电回路、四象限功率模块、四象限斩波功率模块、独立的中间直流电路、牵引逆变功率模块及三极隔离接触器;两组牵引主回路的电气原理和结构完全相同。所述中间直流电路包括储能电路、测量及保护电路;储能电路用于稳定中间回路电压,测量及保护电路由接地测量电路、中间电压传感器和电压检测板组成,牵引逆变功率模块与永磁同步电机之间设置有三极隔离接触器;三极隔离接触器通过铜排连接三相牵引逆变器INV2和永磁同步电机。本发明解决了大功率货运电力机车的牵引变流器无法直接应用永磁直驱电传动系统的问题。
High-power permanent-magnet direct-drive freight locomotive traction converter
大功率永磁直驱货运机车牵引变流器
2021-04-30
Patent
Electronic Resource
Chinese
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B61C Lokomotiven , LOCOMOTIVES / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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