An electric propulsion system includes a battery pack and a DC-DC converter. The converter has a bypass switch and semiconductor switches. A traction power inverter module (TPIM) rectifies a DC bus voltage on the voltage bus to produce an AC bus voltage. An electric machine is connected to the TPIM and energized via the AC bus voltage. A controller calculates required output power from the converter based on a requested operating mode, and speed and torque of the electric machine. When the output power exceeds a threshold, the bypass switch closes to bypass the converter. When the output power is less than the threshold, the controller uses a minimum loss voltage from a loss map as a target control voltage of the converter to optimize efficiency of the electric propulsion system.
一种电力推进系统包括电池组和DC‑DC转换器。该转换器具有旁路开关和半导体开关。牵引功率逆变器模块(“TPIM”)对电压总线上的DC总线电压进行整流以产生AC总线电压。电机连接到TPIM并经由AC总线电压通电。控制器基于电机的请求的操作模式和速度以及扭矩计算来自转换器的所需输出功率。当输出功率超过阈值时,旁路开关闭合以绕过转换器。当输出功率小于阈值时,控制器使用来自损耗图的最小损耗电压作为转换器的目标控制电压,以优化电力推进系统的效率。
OPERATING MODE OPTIMIZATION FOR ELECTRIC PROPULSION SYSTEM WITH DOWNSIZED DC-DC CONVERTER
具有尺寸减小的DC-DC转换器的电力推进系统的操作模式优化
2021-05-11
Patent
Elektronische Ressource
Chinesisch
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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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