MOTOR ANGLE DETECTION AND DIAGNOSIS DEVICE, MOTOR CONTROLLER, ELECTRIC VEHICLE AND METHOD

摘要

This application relates to a motor angle detection and diagnosis apparatus in an in-vehicle motor controller and a motor angle detection and diagnosis method. The motor angle detection and diagnosis apparatus is connected to a drive motor by using a resolver. The resolver is configured to output a resolver feedback signal of an electrical angle of the drive motor. An angle sampling and diagnosis system in the motor angle detection and diagnosis apparatus performs two-channel simultaneous sampling on a resolver feedback signal obtained after adjustment by the resolver feedback processing circuit, and separately calculates a first electrical angle and a second electrical angle; and diagnoses data obtained after the two-channel sampling, the first electrical angle, and the second electrical angle in real time and also diagnoses hardware circuits, and controls the motor controller to enter a safe state when a diagnosis result is abnormal. In this solution, sampling is performed by using two sampling channels, angle software decoding is implemented by using a software algorithm, and a software diagnosis mechanism is added, so that angle decoding of at least an ASIL C can be implemented. This avoids use of a safety decoding chip and reduces production costs.