Hybrid excitation brushless direct-current motor

Abstract

The invention discloses a hybrid excitation brushless direct-current motor, belonging to the technical field of motors. The hybrid excitation brushless direct current motor comprises a motor middle cover, wherein a motor front cover is movably connected to one side of the outer portion of the motor middle cover; a heat-dissipating outer shell is movably connected to the outer portion of the motorfront cover; one side of the exterior of the motor front cover is fixedly connected with a front-end rolling shaft; and the interior of the front-end rolling shaft is fixedly connected with a rotatingshaft. According to the hybrid excitation brushless direct-current motor, the outer side of the motor rear cover is fixedly connected with a heat-dissipating outer box, the tail end of the rotating shaft is fixedly connected with a heat-dissipating piece; the two sides of the outer portion of the motor middle cover are provided with the evenly-distributed circular groove holes, and meanwhile, theouter portion of the motor front cover and the outer portion of the motor rear cover are movably connected with the heat-dissipating outer shell; and two through holes are formed in the outer side ofthe heat-dissipating outer shell, so high temperature in the motor middle cover can be rapidly discharged in the operation process of the device.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a hybrid excitation brushless DC motor. Background technique [0002] The hybrid excitation motor is a wide speed-regulating motor, which combines the advantages of the permanent magnet synchronous motor and the electric excitation synchronous motor. The wind power generation system and drive system of the hybrid excitation motor within the range of speed operation has a bright and mining application prospect, especially It is in the current society that all kinds of electromechanical products and automobiles have begun to get involved in hybrid excitation motors. Therefore, in order to meet the needs of current machinery, a hybrid excitation brushless DC motor is needed. [0003] At present, there are big problems in the installation of the fixed magnets used in the existing hybrid excitation motors on the market, and in the auxiliary rotation of the drive shaft to the rotor. Dur...

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Problems solved by technology

[0003] At present, there are big problems in the installation of the fixed magnets used in the existing hybrid excitation motors on the market, and in the auxiliary rotation of the drive shaft to the rotor. During the use of the existing hybrid excitation motors, the internal temperature of the motor will gradually increase. Too high will lead to the weakening of the magnetic force of the magnet inside the motor, which will lead to a decrease in the working efficiency of the motor. At the same time, the rotation of the hybrid excitation motor depends on the shaft for force support. During the long-term operation of the existing motor shaft, the frictional resistance of the shaft In addition, the internal structure of the existing hybrid excitation motor is complicated, and most of the components are fixedly connected. Once the motor fails, it is difficult for the operator to inspect and repair the internal components of the motor. To this end we propose a hybrid excitation brushless DC motor

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