Double-layer concentric unequal-turn winding design calculation method

Abstract

The invention aims to provide a motor double-layer unequal-turn winding design technology method having properties of convenient calculation, high calculation precision and short calculation period and particularly relates to a double-layer concentric unequal-turn winding design calculation method. The method is advantaged in that strong versatility is realized, harmonic ratio leakage inductance of three-phase asynchronous motor unequal-turn windings with random groove numbers and integer pole number grooves can be calculated, calculation is convenient, other calculation software such as a finite element is not needed, programming is easy for calculation, the design time is saved, no experience formula is utilized in a calculation process, and calculation precision is high.

Description

technical field [0001] The invention relates to a design calculation method for a double-layer concentric winding with unequal turns and full pitch. Background technique [0002] With the country's increasing emphasis on energy conservation and emission reduction, various energy conservation strategies and policies have been issued successively. Among them, induction motors have a large volume and a wide range, and the annual power consumption accounts for about 57% of the entire power generation. Due to the huge base of motors, improving the efficiency of motors has become an important method for energy saving and emission reduction. Now motors with IE4 efficiency level have begun to appear on the market, which will inevitably put forward higher requirements for motor design. [0003] The electromagnetic design of the three-phase asynchronous motor is relatively mature. It is difficult to effectively improve the efficiency of the motor by increasing the amount of effective...

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Problems solved by technology

[0003] The electromagnetic design of the three-phase asynchronous motor is relatively mature. It is difficult to effectively improve the efficiency of the motor by increasing the amount of effective materials by extending the iron core. If the motor iron core is too long, it will cause disadvantages in heat dissipation and reduce the life of the motor. Increased effective materials, such as copper, aluminum, iron, etc. are non-renewable resources, and the cost of the whole life cycle of the motor will increase, which may cause a loss outweighed by the gain in cost

[0006] 1. The design method is aimed at a motor with a specific number of slots and poles, and the calculation method of the harmonic content of the number of turns has poor versatility;

[0007] 2. The calculation method generally adopts the finite element method or empirical formula method, and it is difficult to obtain accurate theoretical values;

[0008] 3. The calculation process is more complicated and the calculation cycle is long

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