Design method of five-phase permanent magnet fault-tolerant motor with high reluctance torque and high salient pole rate

Abstract

The invention discloses a design method of a five-phase permanent magnet fault-tolerant motor with high reluctance torque and high salient pole rate, and belongs to the technical field of motor manufacturing. The invention provides a novel method for selecting five-phase permanent magnet fault-tolerant motor slot pole cooperation. On the basis of determining the motor slot pole, the structure of the motor is designed, and through a multi-objective optimization method, the purposes of high reluctance torque and high salient pole rate are finally achieved. When the slot pole cooperation of the motor is selected, a slot pole matching selection method is provided by constructing a relationship between a mutual coupling coefficient and motor fault tolerance performance. According to the method,the slot poles with high fault-tolerant performance are selected for matching, and on the basis, factors such as a winding factor, a leakage inductance coefficient, rotor loss and cogging torque of the motor are comprehensively considered, so that the proposed motor design method can ensure excellent fault-tolerant performance while realizing high reluctance torque and high salient pole rate.

Description

technical field [0001] The invention relates to the design of a five-phase permanent-magnet fault-tolerant motor, in particular to a method for selecting the slot pole coordination of the five-phase fault-tolerant motor and improving the reluctance torque and salient pole ratio, and belongs to the technical field of motor manufacturing. Background technique [0002] Nowadays, permanent magnet synchronous motors have been widely used, and they play a very important role in many fields from automobiles to aerospace. This is mainly due to several salient features of permanent magnet synchronous motors, including high torque density, high efficiency, and small weight and volume. The permanent magnet synchronous motor uses a magnetic material with a high magnetic energy product to replace the traditional excitation winding, which not only eliminates the negative impact of the excitation winding, but also simplifies the mechanical structure of the motor, which improves the reliabi...

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Problems solved by technology

On the other hand, aiming at the shortcomings of the existing permanent magnet fault-tolerant motors with low reluctance torque and saliency ratio, the present invention firstly proposes a method for selecting high-performance permanent magnet fault-tolerant motor slot pole fits, because the optimized reluctance torque and saliency ratio reflect a relatively contradictory trend to a certain extent, so in order to optimize the two parameters at the same time, so that the motor can achieve ideal performance, the present invention adopts a multi-objective optimization method to achieve high reluctance torque and high convexity Pole Rate Permanent Magnet Fault Tolerant Motor Requirements

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