Over-temperature management of DC-link capacitors in electric vehicle propulsion drive converters

• Main Authors: SANGAM JONATHAN S, KIMMEL JOSEPH SHERMAN, YONAK SERDAR HAKKI, BUGGI, PAOLO
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2024
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention provides over-temperature management of a DC link capacitor in an electric vehicle propulsion drive converter. After startup of the electric drive system, the controller reduces a power output of the inverter in response to a sensed temperature of a power switch of the inverter, a sensed current and voltage of a power electronic module, a sensed DC link voltage, and a thermal impedance parameter of a DC link capacitor indicating an estimated temperature of the DC link capacitor greater than a threshold, to maintain the DC link capacitor temperature below the threshold. 本公开提供了"电动车辆推进驱动转换器中的DC链路电容器的过温管理"。在电驱动系统的启动之后，控制器响应于逆变器的功率开关的感测温度、电力电子模块的感测电流和电压、感测的DC链路电压以及DC链路电容器的热阻抗参数指示所述DC链路电容器的大于阈值的估计温度而降低所述逆变器的功率输出，以维持DC链路电容器温度低于所述阈值。