Small-wheel diameter solid tyre integrated electric machine driven by disc type coreless DC motor

Abstract

The invention discloses a small-wheel diameter solid tyre integrated electric machine driven by a disc type coreless DC motor. The small-wheel diameter solid tyre integrated electric machine comprises a central shaft, wherein a first bearing, a stator disc and a second bearing sequentially sleeve the central shaft, a first rotor disc and a second rotor disc separately sleeve the first bearing and the second bearing and are connected by a hub, a solid tyre is arranged on the hub, permanent magnets are arranged at inner sides of the first rotor disc and the second rotor disc, a plurality of pear-shaped holes are formed in the stator disc, are arranged an annular way and are used for installing a coil, the coil is fixed in the pear-shaped holes by a limiting device, the small-wheel diameter solid tyre integrated electric machine also comprises three Hall sensors, an annular circuit board and a cable harness, and the harness is used for power and signal transmission. The small-wheel diameter solid tyre integrated electric machine has the advantages of simplicity in structure, running reliability, small size, light weight, high efficiency, good speed regulation performance and the like; and moreover, with the adoption a coreless structure, the no-load current is small, and no hysteresis resistance is generated.

Description

technical field [0001] The invention relates to a small wheel-diameter solid tire integrated motor driven by a disc-type ironless DC motor, which belongs to the field of motors. Background technique [0002] The small-diameter solid tire integrated motor can be widely used in electric scooters, electric balance cars, lightweight folding bicycles, and electric wheelchairs for the disabled. Due to the small number of these vehicles in the market, there is no targeted development of a motor. An ideal tire motor to match it. The existing small-diameter solid tire integrated motors on the market mostly use low-speed hub DC motors in the form of outer rotors. The advantages are that the motors have large power, generally do not require maintenance, and have high transmission efficiency. However, due to the existence of such motors Hysteresis resistance, the vehicle's sliding ability is low, and it is difficult to push; another form of small-diameter solid tire integrated motor us...

AI Technical Summary

Problems solved by technology

[0006] 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 plate 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 coreless DC motor in which the outer rotor shell rotates, the purpose of the invention is not clear, and four O-shaped seals are set The pertinence of the 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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