A current distribution control method for a claw pole motor

Abstract

The invention discloses a current distribution control method of a claw pole motor, which is characterized in that: under the condition of satisfying the input command torque Tref, the reasonable distribution ratio of the excitation current If of the rotor and the current Iq of the armature winding of the stator makes the total motor Copper loss is low loss, and its distribution ratio relationship is as follows: Iq=K×If, where Iq is the q-axis current in the rotor dq rotating coordinate system, and K is the current distribution ratio, which considers the nonlinear saturation of the stator and rotor magnetic circuits. The total copper loss of the motor is almost the smallest, the efficiency is close to optimal, the calculation is simple and fast, the influence of temperature on the high efficiency area is reduced, and the performance and operation reliability of the motor are improved.

Description

Technical field [0001] The present invention relates to a current allocation control method of a claw pole motor. Background technique [0002] The claw pole motor is widely used, for example, in-vehicle start-up power-in-one (ISG motor) is the use of claw pole motors, and the specific structure can be referred to in U.S. Patent No. 20060267344 A1, or a introduction of China's 2011 Patent CN100517922 (c). [0003] U.S. Patent US 6707277 also relates to a control method of a claw pole synchronous motor, but does not mention how to optimize the control current, and there is no problem with the problem of magnetic saturation. [0004] China Patent CN1023248882A relates to a mixed excitation synchronous motor wide speed system and current distribution method, China Patent CN102545766A discloses a new speed control system and current distribution method suitable for electric vehicle-driven, China Patent CN103647489A discloses a mixed excitation synchronous motor efficiency optimal eff...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a current distribution control method for claw pole motors, which can solve the problem of considering the nonlinear saturation characteristics of flux linkage in the current distribution control of claw pole motors in the prior art. Only nonlinear optimization methods can be used, and simple search The algorithm speed is slow, and the complex search algorithm basically introduces the derivative related to the magnetization curve, and the derivative is very sensitive to the error of the data, and there is a technical problem of contradiction between accuracy and speed

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