Brushless direct-current motor

Abstract

The invention discloses a brushless direct-current motor. The motor comprises a stator, a rotor capable of rotating relative to the stator, and a motor shaft fixedly connected with the rotor, wherein the stator comprises a stator iron core and an excitation winding; the excitation winding is arranged on the stator iron core; the rotor comprises a rotor magnetic yoke and at least two magnets; the magnets are arranged on the rotor magnetic yoke at intervals; the excitation winding is opposite to the magnets and a first annular heat dissipation channel is reserved; a plurality of second heat dissipation channels are formed in the stator iron core; and the second heat dissipation channels are arranged in an axial direction of the stator iron core. During operation, a current flowing through the excitation winding generates large amounts of heat, and the heat will be quickly discharged through the first heat dissipation channel and the second heat dissipation channels, so that the heat dissipation problem of the motor can be greatly alleviated and motor parts are protected from being damaged. Moreover, the second heat dissipation channels are formed in the stator iron core, so that the mass of the stator iron core is reduced and the mass of the whole motor is reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a brushless DC motor. Background technique [0002] A motor is an energy conversion device, a device that converts electrical energy into kinetic energy through electromagnetic phenomena. In recent years, with the advancement of permanent magnet materials, automatic control and power electronics technology, brushless DC motors have been better developed. The brushless DC motor consists of a motor body and a driver, and is a typical mechatronics product. There are many electronic components inside the brushless DC motor, and the power components generate a lot of heat during operation. If the heat cannot be dissipated in time, it is easy to cause damage. In the prior art, there have been brushless DC motors of more than 15Kw. Such motors are large in size and heavy in weight, and require a liquid cooling system to solve the problem of heat dissipation, and the structure is comple...

AI Technical Summary

Problems solved by technology

The brushless DC motor contains a lot of electronic components, and the power components generate a lot of heat during operation. If the heat cannot be dissipated in time, it is easy to cause damage

In the prior art, there have been brushless DC motors above 15Kw. This kind of motor is large in size and heavy in weight. It needs to use a liquid cooling system to solve the problem of heat dissipation, and its structure is complicated.

For these reasons, it is mainly used in industry and is not suitable for the field of manned aircraft

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