Electric automobile air conditioner compressor drive DC brushless motor

Abstract

The invention relates to the technical field of automobiles, and particularly relates to an electric automobile air conditioner compressor drive DC brushless motor. The motor comprises a motor body, a stator assembly, a stator sleeve, a rotor assembly, a motor shaft, and a back cover assembly. The rotor assembly comprises permanent magnet bars, a rotor drum, and a rotor end cover. The permanent magnet bars are ring-shaped, and are fixed to the inner side of the rotor drum. The rotor drum and the rotor end cover are fixedly connected. The rotor end cover is fixedly connected with the motor shaft through a key. The stator sleeve is fixedly connected with a back end cover. The stator assembly is fixed to the stator sleeve. The stator sleeve movably sleeves the motor shaft. The back cover assembly is equipped with a controller inside. The rotor magnet steel of the motor is not easy to fall off, and can be close enough to the stator, so the efficiency of magnetic action is improved. Moreover, the torque is increased, the number of permanent magnets is increased, and the running stability of the rotor is improved. The motor is convenient to install and easy to match, and the sales thereof is promoted.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a DC brushless motor driven by an air conditioner compressor of an electric automobile. Background technique [0002] With the advent of the automobile era, the environmental pollution caused by automobile exhaust is becoming more and more serious. In addition, the reduction of oil reserves and the rise in oil prices have forced the rapid development of electric vehicles (including hybrid electric vehicles). Now electric vehicles are likely to replace fuel vehicles. [0003] The electric vehicle air conditioning system needs a new type of compressor drive motor suitable for using its own DC power supply, high efficiency, small size, low noise, energy saving and environmental protection. [0004] At present, there are many deficiencies in the electric compressor drive motor used in electric vehicles. For example, the patent number is: ZL201220078257.5, which is called "a DC br...

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Problems solved by technology

[0004] At present, there are many deficiencies in the electric compressor drive motor used in electric vehicles. For example, the patent number is: ZL201220078257.5, which is called "a DC brushless permanent magnet Hallless electric scroll compressor for electric vehicle air conditioners" On the one hand, the permanent magnet strip adopts a built-in structure. Although this built-in structure effectively prevents the permanent magnet strip from falling off due to centrifugal force, it increases the distance between the permanent magnet and the stator, and reduces the efficiency of the magnetic action of the stator and rotor; On the other hand, the controller is not integrated in the drive motor, which brings inconvenience to the installation. At the same time, the product that requires the controller and the motor body to be used together will have a lot of technical support in marketing, which is not conducive to sales.

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