Magnetic loop of high-speed motor of electric vehicle

Abstract

A magnetic loop of a high-speed motor of an electric vehicle is formed in an injection molding and mold pressing mode by sleeving a mold with a magnetic ring. The magnetic loop is characterized in that an inner hole is formed in the magnetic loop, a salient pole pin is manufactured in the inner hole, the inner hole is matched with a motor shaft, the salient pole pin is limited by a motor shaft pin groove, the magnetic ring is located on the radial peripheral wall of the magnetic loop, two end faces of the radial outside of the magnetic ring are provided with steps, the edges of the steps are covered with plastic, and the steps are used for straight limiting; at least one salient pole pin body is arranged on the inner diameter portion of the magnetic ring and used for circumferential limiting of the magnetic ring, and 180-degree line-connection alignment is carried out on the salient pole pin bodies and the salient pole pin of the inner hole with the circle center of the inner hole as the center; a fan is arranged at the joint of the inner hole and an outer ring and used for heat dissipation of the motor, the magnetic loop is straightly aligned with a Hall ring in a balanced mode when assembled and installed, and the magnetic loop shows the angle and position of a Hall element through rotation of the motor shaft.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a magnetic ring of a high-speed motor of the electric vehicle. Background technique [0002] With the continuous maturity of the electric vehicle market and the low cost of using electric vehicles, electric vehicles have become an important means of transportation for families, passengers, and freight, especially in my country, a country with a large population. [0003] The motors of electric two-wheel vehicles and electric tricycles on the existing market include differential motors, hub motors, and series-excited motors. With the rise of automobiles and the needs of users in mountainous and hilly areas, the new generation of electric vehicles expects higher speed, smaller volume, and lower production cost-oriented high-speed motors to become the first choice of various manufacturers. [0004] In the existing brushless high-speed motor, the Hall is placed in the stator and the...

AI Technical Summary

Problems solved by technology

[0004] In the existing brushless high-speed motor, the Hall is placed in the stator and the magnetic steel of the rotor provides the position signal. This process structure is due to the fact that when the motor runs at high speed and reaches a certain temperature rise, the magnetic steel will demagnetize, the Hall is easy to burn out, and the repair rate Extremely high, which brings great trouble to the maintenance of Hall, and restricts the motor to a higher speed

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