Device and process for monitoring power loss in a magnet of a motor for a hybrid electric motor vehicle compares with a reference value

摘要

A device is used for monitoring the power loss of a motor magnet. It comprises a voltage control unit (104) for a permanent magnet-induced voltage, determined at a given rotation rate. A processor (110) compares this with a reference voltage from a fully magnetized permanent magnet at the same rotation rate. Independent claims are also included for the following:- (1) A process for determining power loss as above. (2) A hybrid electric vehicle comprising drive and generator motors and a unit as above.