Permanent-magnet direct drive motor

Abstract

The invention discloses a permanent-magnet direct drive motor, which comprises a shell, wherein a permanent seat is arranged at the bottom part of an inner cavity of the shell; a groove is formed in the upper end of the permanent seat; a stator permanent magnet is arranged in the groove; a plurality of wire chases are arranged at the outer side of the stator permanent magnet at equal intervals; a winding is arranged in each wire chase; a rotating hole is formed in the stator permanent magnet; a motor shaft is inserted into the rotating hole; one end of the motor shaft runs through the shell and is exposed at the outer side of the shell; a rotor permanent magnet is surrounded at the outer side of the motor shaft and is located in the stator permanent magnet; a rotating opening corresponding to the position of the motor shaft is formed in one side of the shell; a plurality of air holes are evenly formed in one side of the shell; and the air holes and the rotating opening are located at the same side of the shell. The permanent-magnet direct drive motor improves the running reliability of the motor, and has the advantages of being simple in structure, small in volume, light in weight, high in power density, high in efficiency and high in reliability.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet direct drive motor. Background technique [0002] Motor (English: Electricmachinery, commonly known as "motor") refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. In the circuit, it is represented by the letter M (the old standard is D). Its main function is to generate driving torque as a power source for electrical appliances or various machinery. The generator is represented by the letter G in the circuit. Its main function is to convert electrical energy into mechanical energy. In order to avoid problems such as high noise, low efficiency, low transmission accuracy, slow response, and mechanical wear of mechanical gear transmission systems in industrial production, direct drive motors are often used. However, in order to obtain low-speed and high-torque out...

AI Technical Summary

Problems solved by technology

Although there is one less air gap than the traditional direct-drive motor with three air gaps, the structure is still more complicated and the processing technology is more difficult

Large flux leakage and core loss, limited power density

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