Abstract: A method for fail-safe resolver excitation includes generating a resolver excitation signal and providing the resolver excitation signal to an input of a first resolver control circuit and to an input of a second resolver control circuit. The method also includes, in response to the first resolver control circuit detecting a fault in the resolver excitation signal provided to the first resolver control circuit: biasing, using the first resolver control circuit, a first resolver amplifier; and communicating, via a communication bus between the first resolver control circuit and the second resolver control circuit, an indication to the second resolver control circuit that the first resolver control circuit detected the fault in the resolver excitation signal provided to the first resolver control circuit.

Abstract: A method for fail-safe resolver excitation includes generating a resolver excitation signal and providing the resolver excitation signal to an input of a first resolver control circuit and to an input of a second resolver control circuit. The method also includes, in response to the first resolver control circuit detecting a fault in the resolver excitation signal provided to the first resolver control circuit: biasing, using the first resolver control circuit, a first resolver amplifier; and communicating, via a communication bus between the first resolver control circuit and the second resolver control circuit, an indication to the second resolver control circuit that the first resolver control circuit detected the fault in the resolver excitation signal provided to the first resolver control circuit.

Abstract: A method for phase-voltage based motor period measurement includes generating a commanded phase voltage and applying the commanded phase voltage to a first phase voltage input of an electric motor, a second phase voltage input of the electric motor, and a third phase voltage input of the electric motor, measuring a first period of a phase voltage associated with the first phase voltage input and the second phase voltage input and comparing the measured first period to a frequency of the commanded phase voltage, and, in response to a determination that the measured first period of the phase voltage associated with the first phase voltage input and the second phase voltage input is outside of a range of the frequency associated with the commanded phase voltage, identifying a fault associated with the first integrated circuit or signal path.

Abstract: A method for phase-voltage based motor period measurement includes generating a commanded phase voltage and applying the commanded phase voltage to a first phase voltage input of an electric motor, a second phase voltage input of the electric motor, and a third phase voltage input of the electric motor, measuring a first period of a phase voltage associated with the first phase voltage input and the second phase voltage input and comparing the measured first period to a frequency of the commanded phase voltage, and, in response to a determination that the measured first period of the phase voltage associated with the first phase voltage input and the second phase voltage input is outside of a range of the frequency associated with the commanded phase voltage, identifying a fault associated with the first integrated circuit or signal path.