Low-heat coupling and non electromagnetic coupling dual-redundancy permanent-magnet synchronous motor between phase windings

Abstract

The invention discloses a low-heat coupling and non electromagnetic coupling dual-redundancy permanent-magnet synchronous motor between phase windings. Two sets of mutually independent three-phase symmetrical windings are placed on a stator core. Two controllers independently supply power for the two sets of windings. The two sets of windings can work together or work respectively and independently. Each coil of each phase winding is a concentrated winding, and the end portions of the windings are not overlapped. Due to the fact that small teeth are arranged and heat resistant thermal insulation materials are placed on two sides of the small teeth, the phase winding is separated from an electric angle, therefore leakage mutual inductance which corresponds to leakage magnetic fields which are arranged between the phase windings and on end portions is small, and no inter-groove leakage inductance appears. Meanwhile, thermal coupling between the phase windings is low. An even number of coils of an even number are continuously winded and connected in series on the periphery of a stator according to a rule of repeated winding and rewinding. Mutual inductance between the phase windings which correspond to armature reaction magnetic fields is small, approximately no electromagnetic coupling exists between the phase windings, and reliability is improved.

Description

technical field [0001] The invention relates to a double redundancy permanent magnet synchronous motor. In particular, it relates to a double-redundancy permanent magnet synchronous motor with low thermal coupling and no electromagnetic coupling between windings of each phase. Background technique [0002] Permanent magnet synchronous motors have many advantages and are widely used in aerospace. Moreover, the reliability design of the permanent magnet synchronous motor is very important in important and complex servo systems that do not allow shutdown, such as missile and aircraft steering gear, engine throttle control, etc. At present, in order to improve the reliability of the flight control system, dual-redundancy permanent magnet synchronous motor configurations including parallel and series structures are generally used. Among them, the double-redundancy permanent magnet synchronous motor with series structure is to install two sets of independent stators and rotors c...

AI Technical Summary

Problems solved by technology

Although the parallel structure double redundancy permanent magnet synchronous motor solves the problem of large volume and weight, some parallel structure double redundancy permanent magnet synchronous motors eliminate the thermal coupling between the two sets of windings, but the mutual inductance between the two sets of windings Influence, that is, the presence of electromagnetic coupling increases the uncertainty of system parameter changes

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