DERATING CONTROL OF A POWER INVERTER MODULE
A system includes a DC battery pack, an inverter coolant loop, first and second temperature sensors, a polyphase electric machine, and a power inverter module (PIM) connected to the battery pack and electric machine. The PIM includes a plurality of semiconductor switches. The controller is operable...
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| creator | Arafat MD Nayeem Kadry Syed MD Jaffrey Al Anwar Mohammad N |
| description | A system includes a DC battery pack, an inverter coolant loop, first and second temperature sensors, a polyphase electric machine, and a power inverter module (PIM) connected to the battery pack and electric machine. The PIM includes a plurality of semiconductor switches. The controller is operable to selectively derate the PIM and thus reduce a commanded torque to the electric machine. The controller is programmed to execute a method and thereby receive a coolant temperature from the first temperature sensor and a PIM temperature from the second temperature sensor, and to determine a set of electrical values of the electric machine. The controller estimates a junction temperature of the semiconductor switches using the temperature of the coolant, the temperature of the PIM, and the set of electrical values. The controller selectively derates the PIM using the estimated junction temperature when the temperature of the PIM exceeds a calibrated maximum temperature. |
| format | Patent |
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| 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 GENERATION |
| title | DERATING CONTROL OF A POWER INVERTER MODULE |
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