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What are the causes of drive motor failure in new energy vehicles?

1 Answers

ChaseLynn

07/30/25 9:50am

New energy vehicle drive motor failures can be attributed to the following reasons: Causes of excessive sparking, localized overheating, and vibration during motor operation: Water ingress into the motor causing short circuits that burn out the motor; Overloading the motor leading to commutator short circuits and burnout, evident by the commutator turning black. Causes of abnormal noises in the motor: Misalignment between the motor and rear axle exceeding tolerance standards; Poor contact between brushes and commutator requiring adjustment; Failure of bearings on the motor's rotor necessitating replacement. Causes of motor failure to rotate: Blown fuse or damaged power switch. Diagnostic method: Turn on the power switch and measure resistance between input and output terminals using a multimeter's ohmmeter function. Zero resistance indicates normal operation, while infinite resistance indicates a faulty power switch.

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