A sensor fault detection method for detecting a fault of at least one sensor in a motor drive system includes performing a calculation (A) to determine a counter electromotive force error Ver relative to an αβ fixed coordinate system or a dq rotating coordinate system. The calculation (A) is performed based on currents Iα and Iβ on αβ axes in the αβ fixed coordinate system, reference voltages Vα* and Vβ* on the αβ axes, and an electrical angle θe of a rotor. The counter electromotive force error Ver represents a function of an error between an estimated phase angle ρs and a measured phase angle ρ based on sensor values to be measured by the sensors. The method also includes detecting the fault based on the counter electromotive force error Ver.
SENSOR FAULT DETECTION METHOD, MOTOR DRIVE SYSTEM, AND ELECTRIC POWER STEERING SYSTEM
2019-09-05
Patent
Electronic Resource
English
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