POWER ELECTRONIC MODULE IGBT PROTECTION METHOD AND SYSTEM
First Claim
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1. A method of delivering power to a load comprising:
- activating and deactivating a solid state switch at a specified switching frequency to generate an output current waveform;
determining a junction temperature variation of the solid state switch;
reducing the switching frequency based upon the junction temperature variation.
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Abstract
A power electronics device with an improved IGBT protection mechanism is provided. More specifically, systems and methods are provided for reducing the switching frequency of an inverter module based on the junction temperature variation of the IGBT.
34 Citations
24 Claims
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1. A method of delivering power to a load comprising:
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activating and deactivating a solid state switch at a specified switching frequency to generate an output current waveform; determining a junction temperature variation of the solid state switch; reducing the switching frequency based upon the junction temperature variation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating an inverter module, comprising:
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activating and deactivating a solid state switch at a switching frequency to generate an output current waveform, wherein the solid state switch is electrically coupled in parallel to a diode; varying the switching frequency based on an estimated temperature of the solid state switch or the diode. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A motor control system, comprising:
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an inverter module comprising a solid state switch coupled to a case, the inverter module configured to generate an output current waveform; control circuitry coupled to the inverter module and configured to vary a switching frequency of the inverter module based on an estimated junction temperature of the solid state switch. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification