Method for diagnosing turn-to-turn short circuit of permanent magnet fault-tolerant motor
A technology of inter-turn short-circuit fault and permanent magnet fault tolerance, which is applied in the direction of motor generator testing, measurement of electricity, and measurement of electric variables, etc. It can solve the problem of inter-turn short-circuit fault with small turns, which is difficult to apply, has no effective method, and has no obvious fault characteristics. and other problems to achieve the effect of solving the problem of online fault diagnosis
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[0020] The present invention is described by taking a six-phase 8-pole permanent magnet fault-tolerant motor as an example. The fault diagnosis method for inter-turn short circuit of a permanent magnet fault-tolerant motor with six-phase 10-pole, five-phase 8-pole, four-phase 4-pole structures is the same as that of this embodiment.
[0021] Referring to Figure 1, the rotor of a multi-phase permanent magnet synchronous motor with fault tolerance is inlaid with rare earth permanent magnets, and can adopt radial or tangential structures. The stator structure is that each phase winding is wound on one armature tooth, and each slot has only one phase winding, and the armature tooth without winding acts as a magnetic flux circuit to play the role of thermal isolation and electrical isolation between phases. The ends of the motor windings of this structure are physically isolated because they do not overlap, thereby avoiding the serious failure of phase-to-phase short circuit. When ...
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