Solid and laminated hybrid permanent magnet rotor structure

Abstract

The invention discloses a solid and laminated hybrid permanent magnet rotor structure, belonging to the technical field of permanent magnet motors. The rotor structure is composed of a solid body andlaminated bodies connected with each other at intervals. The middle part of the solid body is penetrated with an axial permanent magnet slot, the axial permanent magnet slot is provided with a permanent magnet, and the middle part of the laminated body is penetrated with an axial ventilation slot. The outer circumference of the solid body and the outer circumference of the laminated body are provided with axial opening grooves, the axial opening grooves of the solid body are provided with starting cages, and the axial opening grooves of the laminated body are spaced with starting cages; The inner circumferential end face of the solid body and the inner circumferential end face of the laminated body are surrounded by a rotating shaft hole, and a magnetic isolation jacket is arranged in therotating shaft hole. The invention divides the rotor iron core into two parts of a solid body and a laminated body, so that the starting torque of the self-starting permanent magnet synchronous motoris ensured to be large enough, and the starting current is reduced; at the same time, the hollow slot of the rotor laminated body can effectively take away the heat of the rotor, reduce the temperature rise of the motor, protect the permanent magnet, and improve the efficiency of the motor.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to a solid and laminated hybrid permanent magnet motor that can ensure a sufficiently large starting torque while reducing the starting current, effectively reducing the temperature rise of the motor, and improving the efficiency of the motor. Magnetic rotor structure. Background technique [0002] At present, permanent magnet motors are more and more widely used, and have been widely used in oilfield beam pumping units, electric vehicles, ship propulsion, and future high-speed rail. Among them, permanent magnet self-starting motors are used in many fields because they do not require auxiliary starting equipment such as frequency converters. Although the permanent magnet self-starting motor has some applications, it has certain problems. For example, the pure solid rotor permanent magnet motor has a small starting current and a large starting torque, but the rotor t...

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Problems solved by technology

Although the permanent magnet self-starting motor has some applications, it has certain problems. For example, the pure solid rotor permanent magnet motor has a small starting current and a large starting torque, but the rotor temperature is very high during operation, which seriously threatens the operation safety of the permanent magnet; When the laminated rotor permanent magnet motor is started, the starting current is very large and the starting torque is small, which is difficult to meet the requirements of heavy-duty starting

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