SYNCHRONOUS ELECTRIC MACHINES SELF-SENSING FAULT DETECTION

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SYNCHRONOUS ELECTRIC MACHINES SELF-SENSING FAULT DETECTION

This abstract first appeared for US patent application 18496175 titled 'SYNCHRONOUS ELECTRIC MACHINES SELF-SENSING FAULT DETECTION

Original Abstract Submitted

Techniques are described to continuously calculate an inverter DC power of a synchronous machine, e.g., motor or generator, based on the individual phase currents, DC link voltage, and gate signals, which can be compared against the commanded mechanical power based of the estimated rotor speed and commanded torque. A controller can determine whether to shut down the inverter, such as the pulse width modulation (PWM), if the DC power is greater than a threshold value. Such a threshold can be defined to allow an acceptable position and speed estimation error margin.