Efficient cast copper self-starting permanent magnet motor

Abstract

The invention discloses an efficient cast copper self-starting permanent magnet motor. The motor comprises a machine base and a shell which is composed of a front end cover and a rear end cover on thetwo sides of the machine base. A front bearing is arranged in the front end cover; a rear end cover is arranged in the rear end cover, a stator core and a motor rotor are arranged in the shell, a circuit of the stator core is connected into a junction box outside the shell, the motor is characterized in that the motor rotor comprises an end ring and a cast copper rotor core, the cast copper rotorcore comprises a rotor punching sheet and a shaft which are nested with each other, and a permanent magnet is embedded in one side, close to the shaft, of the rotor punching sheet; and rotor conducting bars are uniformly distributed on the rotor punching sheet. According to the high-efficiency cast copper self-starting permanent magnet synchronous motor provided by the invention, the starting current of the motor can be reduced, the self-starting permanent magnet synchronous motor can be well started, and the starting current of the product is controlled to be about 7 times by improving the motor rotor, so that the impact of motor starting on a power grid or a transformer is reduced, and the practicability of the product is improved.

Description

technical field [0001] The invention relates to a high-efficiency cast copper self-starting permanent magnet motor, which belongs to the technical field of motors. Background technique [0002] Starting permanent magnet motors are widely used in many fields because of their high efficiency, high power factor, and wide high-efficiency area, such as: textile machinery, petroleum oil pumping equipment, ceramics and ball mills in the building materials industry. Various self-starting motors have been widely used permanent magnet motor. The common features of these types of equipment are: they are all equipment for heavy-duty starting, and require a large starting torque; while running, the load rate is low. [0003] In order to meet the requirements of heavy-duty start-up of equipment, the capacity of the motor had to be increased during model selection in the past; but in normal operation, the load rate is very low, the efficiency is also very low, and the power factor is also...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the existing self-starting permanent magnet motor adopts a cast aluminum rotor, and the starting current is too large, which may easily cause demagnetization of the magnet steel and even burn out the motor windings. To provide a high-efficiency cast copper self-starting permanent magnet Magneto, a self-starting permanent magnet synchronous motor that can not only reduce the starting current of the motor, but also start well

Images