Motor rotors and permanent magnet motors

Abstract

The invention provides a motor rotor and a permanent magnet motor. The motor rotor comprises a rotor core (1) and magnetic steel grooves (2) arranged on the rotor core (1), the magnetic steel grooves(2) extend along the circumferential direction of the rotor core (1), permanent magnets (3) are arranged in the magnetic steel grooves (2), magnetic isolation holes (4) are further formed in the rotorcore (1), and the magnetic isolation holes (4) are formed in the outer side edges of the magnetic steel grooves (2) located at the radial outermost side of the rotor core (1), are communicated with the magnetic steel grooves (2) and are symmetrical about the D axis of the pole where the magnetic isolation holes (4) are located. According to the motor rotor and the permanent magnet motor, the demagnetization resistance of the motor can be effectively enhanced.

Description

technical field [0001] The present application relates to the technical field of motor equipment, in particular to a motor rotor and a permanent magnet motor. Background technique [0002] The permanent magnet assisted synchronous reluctance motor is a new type of AC motor that follows the principle of minimum reluctance path closure and generates magnetic pull to drive the motor to rotate through the reluctance changes caused by the rotor at different positions. It has simple structure, durability and high efficiency. , wide range of speed regulation, low cost and other advantages. [0003] The permanent magnet assisted synchronous reluctance motor maximizes the reluctance torque of the permanent magnet assisted synchronous reluctance motor. In the design of the rotor structure, the difference between the d and q axis inductance of the motor is increased (increasing the q axis inductance or reducing the d axis Inductance) can increase the reluctance torque of the motor and...

AI Technical Summary

Problems solved by technology

Ferrite permanent magnets are prone to demagnetization at low temperatures, and NdFeB permanent magnets are prone to demagnetization at high temperatures. Improving the anti-demagnetization ability of permanent magnet-assisted synchronous reluctance motors. Demagnetization characteristics are the most important criteria for evaluating permanent magnet motors in motor application systems. , but the existing technology still has the risk of motor demagnetization, which affects the life of the motor application

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