Low-fluctuation permanent magnetic rotor of electromobile motor

Abstract

The invention provides a low-fluctuation permanent magnetic rotor of an electromobile motor, and relates to the technical field of motors. The technical problem of reducing torque fluctuation of the motors is solved. The rotor is provided with multiple permanent magnetic units and multiple regulation holes which are in one-to-one correspondence with all the permanent magnetic units; each permanent magnetic unit comprises V-shaped permanent magnetic slots formed in the rotor and two pieces of magnetic steel embedded in the permanent magnetic slots, and each regulation hole is located between the two pieces of the magnetic steel of the corresponding permanent magnetic unit. The low-fluctuation permanent magnetic rotor is specially suitable for electromobiles to use.

Description

technical field [0001] The invention relates to motor technology, in particular to a low-fluctuation permanent magnet rotor technology of an electric vehicle motor. Background technique [0002] Electric vehicles are an important way to solve energy crisis and environmental pollution. The driving motor for electric vehicles restricts the research and development and industrialization process of electric vehicles in China. Especially in the high-efficiency built-in permanent magnet synchronous motor suitable for electric vehicles, there are defects such as low power density, narrow high-speed constant power range, large torque fluctuation, low overload capacity and poor reliability, which make it difficult to meet the requirements. The driving motor for electric vehicles restricts the research and development and industrialization process of electric vehicles in China. [0003] Cogging torque (also known as reluctance torque) is a fatal flaw in the speed control system of a...

AI Technical Summary

Problems solved by technology

Existing methods for reducing motor torque fluctuation mainly include fractional slot method, auxiliary slot method, auxiliary tooth method, inclined slot method, oblique pole method, closed slot method, and magnetized slot wedge method. These methods have their own advantages and disadvantages, but they are always difficult. Effectively eliminate the cogging effect

The inclined slot or inclined pole is the most commonly used method to reduce the torque fluctuation, but the inclined slot and inclined pole method have an impact on the flat top width of the square wave motor air gap magnetic induction intensity, and the stator inclined slot complicates the production process and structure, making the stator slot area Decrease, reduce output, increase copper consumption, both chute and oblique pole reduce output, complicate the process and structure of the motor, and increase the manufacturing cost of the motor

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