True fractional slot motor double-layer unequal turn winding design method

A design method and technology of fractional slots, applied in the direction of electric components, manufacture of motor generators, shape/style/structure of winding conductors, etc., can solve the general design method of windings with fractional slots and unequal turns, and reduce harmonic content and other problems to achieve the effects of saving design time, strong versatility, and convenient calculation

Active Publication Date: 2019-11-05
SHANGHAI MOTOR SYST ENERGY SAVING ENG TECH RES CENT +2
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Problems solved by technology

Patent No. CN201110308218.X "A Three-phase Concentrated Winding with Unequal Turns and Fractional Slots" provides a concentrated winding with unequal turns with a turn ratio of 1 / 2, which effectively reduces the harmonic content, but does not A general design method for fractional-slot unequal-turn windings with arbitrary turns ratio

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  • True fractional slot motor double-layer unequal turn winding design method
  • True fractional slot motor double-layer unequal turn winding design method
  • True fractional slot motor double-layer unequal turn winding design method

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Embodiment Construction

[0025] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0026] Since the number of slots per pole and phase of the true fraction slots is a true fraction, in order to minimize the end length, a concentrated winding with a span of 1 should be used as much as possible, and a double-layer winding should be used as much as possible in order to improve the winding waveform.

[0027] The unequal-turn winding of the motor can improve the flux density harmonic content of the motor air gap. ...

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Abstract

The present invention provides a true fractional slot motor double-layer unequal turn winding design method. The method comprises the following steps: determining the stator slot number Q and the rotor pole number 2p; calculating the winding span distance [tau]; calculating the electric angle a; grouping each phase of the winding; calculating the winding coefficient(s) under different harmonic coefficients, and taking the maximum value of the harmonic order as Max; and calculating and obtaining the harmonic specific leakage permeance coefficient [sigma] s. The method has the advantages of strong versatility, capability of calculating the harmonic content of any fractional slot unequal turn winding, convenient calculation without the aid of the finite element and other calculation software,easiness for programming and calculation, saving of design time, no empirical formula(s) in the calculation process and high calculation precision.

Description

technical field [0001] The invention relates to a design calculation method for a double-layer unequal-turn winding of a true fractional slot three-phase motor. Background technique [0002] Integer slot motor is a motor whose number of slots per pole and phase is an integer, and fractional slot is a motor whose number of slots per pole and phase is a fraction. If the number of slots per pole and phase of a stator is a true fraction, then this motor It is a true fractional slot motor. Integer slots are widely used in the design of industrial general-purpose three-phase asynchronous motors and permanent magnet synchronous motors because of their good flux density waveforms and the balance of each phase. In recent years, the new energy automobile industry led by electric vehicles has developed rapidly, and the electric motor as the core power device of electric vehicles has become an important part of the performance of the whole vehicle. The design concept of electric vehic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/12H02K3/18H02K3/28H02K15/00G06F17/50
CPCH02K3/12H02K3/18H02K3/28H02K15/00H02K2213/03
Inventor 姚丙雷王鸿鹄
Owner SHANGHAI MOTOR SYST ENERGY SAVING ENG TECH RES CENT
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