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; and
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.
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Citations
23 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; and 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; and varying the switching frequency based on a determined temperature variation of the solid state switch or the diode. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. 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; and control circuitry coupled to the inverter module and configured to vary a switching frequency of the inverter module based on a determined junction temperature variation of the solid state switch. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification