Disc type unit lamination coreless DC motor

Abstract

The invention discloses a disc type unit lamination coreless DC motor. The disc type unit lamination coreless DC motor comprises a main shaft, the main shaft is successively sleeved by a first bearing, a first stator disc, at least one third stator disc, a second stator disc and a second bearing, the first bearing is sleeved by a first rotor disc, the second bearing is sleeved by a second rotor disc, at least two third rotor discs are clamped between the first rotor disc and the second rotor disc, adjacent third rotor discs are connected through a ferrule, the inner side of the first rotor disc and the inner side of the second rotor disc are each provided with a first groove, the first grooves are internally provided with first permanent magnets, the outer side of the first rotor disc is provided with a solar gear ring used for transmitting torque, the two sides of each third rotor disc are each provided with a second groove, the second grooves are internally provided with second permanent magnets, coils are embedded in the stator discs, and the coils are fixed on the stator discs through limiting devices. The disc type unit lamination coreless DC motor is small in zero-load currents, wide in efficiency interval and large in output torque and is free from hysteresis resistance.

Description

technical field [0001] The invention relates to a disk-type unit laminated coreless DC motor, which belongs to the field of drive motors for two-wheeled electric vehicles. Background technique [0002] Existing electric bicycles mostly use low-speed hub motors, which have the advantages of large motor power, generally maintenance-free motors, and high transmission efficiency. However, due to the hysteresis resistance of such motors, the riding function of electric bicycles is weakened or even lost. This kind of electric bicycle that lacks the riding function is equipped with the rated power of its driving motor based on the standard of being able to carry loads uphill. The rated power of most of the motors far exceeds the current national standard, and electric bicycles are gradually becoming motorized. development route. Motorized electric bicycles, frequent traffic accidents, have become a social problem that needs to be solved urgently. [0003] In order to overcome the...

AI Technical Summary

Problems solved by technology

[0008] Patent No. 201310310431.3 discloses a disc-type coreless permanent magnet brushless DC motor, which adopts a ring-shaped coil winding similar to that of the disc-type coreless permanent magnet DC motor disclosed in Application No. 201310033295.8. The arc radius is 1.5-2 times of the arc radius near the shaft end, the arc radius of the two waistlines is 3-5 times of the arc radius away from the shaft end, the space utilization rate of the stator disk is very low, and the magnetic field concentration is even worse , and the coil winding lacks a limit device, it is difficult to limit the displacement of the coil in the axial direction; the motor of this invention adopts a disc-type dual-power iron-coreless DC motor that rotates the outer rotor shell, the purpose of the invention is not clear, and four O The pertinence of the circular sealing ring is not strong, the motor lacks a power output device and a fixing device, and it seems inappropriate to use two kinds of bearings with different specifications on the motor shaft.

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