Disc-type permanent-magnet synchronous motor with combined core stator and bilateral outer rotor

Abstract

The invention discloses a disc-type permanent-magnet synchronous motor with a combined core stator and a bilateral outer rotor. The disc-type permanent-magnet synchronous motor comprises the combined core stator and the bilateral disc-type outer rotor with an inverted U-shaped ring section structure, wherein the combined core stator comprises an inner ring core and an outer ring core; the outer ring surface of the inner ring core is embedded into the inner ring surface of the outer ring core to form a whole stator structure; the combined core stator is provided with perforated winding grooves and embedded same coils in the axial ring section; and permanent magnets corresponding to the windings of the combined core stator are uniformly distributed at the inner side of the inverted U-shaped ring section structure of the bilateral outer rotor of the motor. The outer ring core stator is added and matched with the permanent magnets on the circumferential surface of the outer rotor, equivalently, a group of motors are added, and meanwhile, the quantity of the outer end edges of each winding coil is reduced, so that the disc-type permanent-magnet synchronous motor is high in torque density and power density, small in copper loss, high in efficiency and convenient to control.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to a disc-type permanent magnet synchronous motor with a combined iron core stator and double-sided outer rotors. Background technique [0002] Due to the small axial size and large radial size, the disc motor has a large power density, high force index, and direct drive characteristics of low speed and high torque due to its small axial size and large radial size. It has been used in robot direct drive joints, electric wheels, wind power It has been applied in power generation, household appliances, ship steering gear and other fields. [0003] Among them, the single stator bilateral outer rotor disc permanent magnet synchronous motor with iron core also has the following advantages: because the stator iron core provides a high magnetic permeability magnetic circuit, the power index of the motor is higher than that of the ironless type; The stator core causes a strong axial f...

AI Technical Summary

Problems solved by technology

[0004] However, there are also prominent technical problems in the existing bilateral outer rotor disc permanent magnet synchronous motor

On the one hand, for direct-drive applications, since there is no deceleration and transmission device for torque amplification and speed adjustment, higher requirements are placed on the power density and torque density of the motor. Due to the limitation of the control technology level, there is still a big gap between the power and torque density of the disc motor and the actual engineering application requirements

On the other hand, since the stator core is built-in, its copper loss and iron loss will cause the motor to heat up, so a built-in cooling measure must be designed, which further increases the axial size of the motor and reduces the power index

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