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Abstract

The present invention discloses a method for determining a tooth magnetic flux density ratio and an optimal split ratio of a motor, relating to the field of motor design. The method includes: under the condition that different numbers of series turns per slot are given, performing analytic calculation to acquire a plurality of stator slot area and current density curves with a motor split ratio being an independent variable; using a magnetic flux density ratio to acquire tooth and yoke thicknesses of a motor when at different split ratios, acquiring a model of the motor, and then performing finite element simulation on the motor model to acquire a plurality of average torque curves with the motor split ratio being an independent variable; acquiring a motor split ratio corresponding to the maximum value of each average torque curve, and substituting the same into a corresponding current density curve to acquire current density at maximum average torque for the different number of series turns per slot; and acquiring a motor split ratio when maximum current density is not exceeded and the average torque is at maximum, and using the same as the optimal split ratio of the motor. In the present invention, the optimal split ratio of a motor is rapidly and accurately determined by means of finite element simulation in combination with analytic calculation.

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First Claim