High power density permanent magnet synchronous motor with radiator

Abstract

The invention provides a high power density permanent magnet synchronous motor with a radiator and relates to a radiator structure of the permanent magnet synchronous motor. The motor comprises a stator composed of a stator iron core, a stator winding, a machine casing, a front end cover and a rear end cover and a rotor composed of a rotor iron core, a shaft and the like. The high power density permanent magnet synchronous motor with the radiator is characterized in that the radiator is mainly composed of a double-helix-shaped copper pipe or aluminum alloy pipe water channel installed in the wall of the machine casing and a water inlet and output nozzle installed on the front end cover. The radiator has the advantages of being resistant to high water pressure, strong in heat dissipating capacity, balanced in heat dissipation, simple in structure, small in volume and the like. The radiator can be widely applied to the permanent magnet synchronous motor and is particularly suitable for the high power density permanent magnet synchronous motor.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor structures, and in particular relates to a radiator structure of permanent magnet synchronous motors. Background technique [0002] At present, with the wide application of rare earth permanent magnet materials and modern advanced processing molding and magnetizing technology, permanent magnet motors have become the main direction of the development of the motor industry. In particular, permanent magnet synchronous motors have the advantages of precise controllability, high efficiency, high power, wide operating speed range, simple structure and maintenance-free, and are widely used in servo motors, new energy vehicle starter generators, drive motors and hub motors. . Since the permanent magnet synchronous motor uses permanent magnets as the magnetic field source, it can provide a stronger magnetic field than the electric excitation motor under the same volume, so the p...

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Problems solved by technology

[0005] 1. The water channel of the existing permanent magnet synchronous motor radiator is formed by press-fitting the inner and outer shells. The contact surface cannot guarantee absolute sealing, which causes water leakage on the water channel wall. Water leakage on the water channel wall will seriously affect the heat dissipation of the motor. Therefore, the motor It can only be used in low water pressure heat dissipation conditions, and only suitable for ordinary motors with low heat dissipation requirements

Can not be used in heat dissipation conditions of high power density permanent magnet synchronous motor

[0006] 2. The water channel of the existing permanent magnet synchronous motor radiator is a single spiral, and the water inlet and outlet are divided into two ends. The temperature of the water inlet is low and the temperature of the water outlet is high, resulting in uneven temperature distribution of the shell and large differences in heat dissipation effects of various parts of the motor. , so that the local temperature of the motor is too high, it will cause damage to the motor windings, magnetic steel, etc.

[0007] 3. The components of the existing permanent magnet synchronous motor radiator have many components and complex structures. The water nozzle is installed on the side of the outer shell, and the external connection installation takes up a lot of space; and the water nozzle increases the overall weight of the motor as an independent component, resulting in an increase in cost. The manufacturing process is complicated, and it is not easy to popularize and apply

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