Low mutual inductance fault-tolerant six-phase double salient pole brushless DC motor

Abstract

The invention discloses a low mutual inductance fault-tolerant six-phase double-salient pole brushless DC motor, which comprises a stator assembly and a rotor core arranged on the same rotating shaft; the stator assembly includes a stator core, an excitation element and a six-phase stator winding; the stator core is provided with 12N stator poles, N is a natural number; there are 10N or 14N rotor poles on the rotor core, and the number of excitation elements is 6N. Each excitation element is arranged across two stator poles, and the adjacent excitation elements are connected and polarized. On the contrary; each phase of the stator winding is composed of 2N stator coils of the same phase in series or in parallel, and the phase angle difference between the stator windings is 60°; the excitation element and the stator coil turn chain of the corresponding two-phase stator winding, And the polarity of the excitation element is the same as that of the stator winding it is connected to. The invention realizes electrical isolation between six-phase windings, has better fault-tolerant performance, and has small commutation torque ripple.

Description

technical field [0001] The invention relates to the field of special motor body design, in particular to a low mutual inductance fault-tolerant six-phase double salient pole brushless DC motor. Background technique [0002] Double salient pole motor is a new type of motor composed of position sensor, power electronic power converter, permanent magnet or electromagnetic excitation unit, controller and motor body with salient pole stator and rotor structure. As a new type of variable reluctance motor, it has a large ratio between the maximum value and the minimum value of reluctance, and has good electromechanical energy conversion characteristics and application prospects. [0003] The traditional double salient pole motor is a three-phase motor, which adopts the 6N / 4N pole structure of the inner rotor, the number of stator poles is 6N, the number of rotor poles is 4N, and N is a natural number, indicating the number of unit motors. In order to further improve the reliabilit...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a low mutual inductance fault-tolerant six-phase double-salient pole brushless DC motor in view of the problem that the six-phase double-salient pole motor in the prior art has strong mutual inductance between phases and poor fault tolerance performance

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