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Tooth-slot torque optimization design-method of permanent-magnetism brushless direct-current dynamo

A permanent magnet brushless direct current, optimized design technology, applied in computing, electrical digital data processing, instruments, etc., can solve problems such as irreparable energy loss, achieve fast computing speed, high precision of computing results, and reasonable program structure Effect

Inactive Publication Date: 2017-05-31
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The above optimization can improve the system efficiency to a certain extent, but it cannot make up for the energy loss caused by the low efficiency of the motor body design

Method used

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  • Tooth-slot torque optimization design-method of permanent-magnetism brushless direct-current dynamo
  • Tooth-slot torque optimization design-method of permanent-magnetism brushless direct-current dynamo
  • Tooth-slot torque optimization design-method of permanent-magnetism brushless direct-current dynamo

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Embodiment Construction

[0036] 1. Fractional slot concentrated winding permanent magnet brushless DC motor

[0037] The permanent magnet motor generates a magnetic field by a permanent magnet, so it does not need an excitation winding and an excitation power supply. It has a simple structure, low loss, high efficiency, and high power density. With the improvement and improvement of the performance of permanent magnet materials, especially the development of rare earth permanent magnet materials, the performance of permanent magnet motors has been further improved, showing the unmatched superiority of electric excitation motors in terms of energy efficiency. Usually, in motor design, the magnetic field is simplified into a magnetic circuit, the air gap flux density of the motor is calculated through the magnetic circuit, and the relevant parameters of the motor are obtained according to empirical formulas. However, the motor parameters obtained in this way are approximate values, and need to add corre...

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Abstract

Disclosed is a tooth-slot torque optimization design-method of permanent magnetism brushless direct-current dynamo. The permanent-magnetism brushless direct-current dynamo utilizes fractional slot winding, and is characterized by the specific steps as follows: 1) construct parameterized models with finite element software to realize appropriately choosing geometric parameters of the dynamo; 2) apply optimization algorithm to optimize the design of the dynamo; 3) assemble a synthetical platform for constructing parameterized model of the dynamo and processing batch computing. Construct parameterized model with the finite element software, analyze the electromagnetic field of the dynamo, then select appropriate geometric parameter of the dynamo as optimization variable according to optimization objective and constraint condition. Programming language is applied to build the synthetical optimization platform of linking optimization algorithm and finite element computing. By inputting optimization parameters directly, users are able to call the finite element software backstage to construct parameterized models and process batch computing. The aforementioned design-method has the advantages of direct-visuality, having reasonable programming frame, fast computing, precise computing precise results and so on.

Description

technical field [0001] The invention relates to the optimized design of the structure of the permanent magnet motor body to improve the performance of the motor as a whole, especially the optimal design of the permanent magnet brushless DC motor with fractional slot concentrated windings. Background technique [0002] In recent years, with the continuous innovation of permanent magnet synchronous motor design theory and the continuous development of control theory, the fractional slot form of stator armature winding has become one of the main development directions, and it has been widely used in the field of small and medium power. In the literature "Radial Electromagnetic Vibration Characteristics of Permanent Magnet Synchronous Motors for Vehicles" (Journal of Electrical Machinery and Control, 2012, 16(5), P33-39), the electromagnetic vibration phenomenon in permanent magnet synchronous motors with fractional slot windings was analyzed by finite element method. After anal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 李强章琼方孙炜赵竹苑金天
Owner NANJING UNIV OF SCI & TECH
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