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Geared hub motor of electric bicycle

A technology for electric bicycles and driving motors, which is applied in the direction of electric components, electrical components, electromechanical devices, etc., to achieve the effects of airtight performance assurance, radial space utilization, and overall improvement

Pending Publication Date: 2019-05-17
眭华兴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To increase the output power of the disk-type ironless DC motor used as the drive motor, the influence of thermal factors on the motor coil winding must be overcome. So far, this technology can only be successfully applied to the small-power motor with a single rotor structure in the form of a printed circuit motor. the reason

Method used

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  • Geared hub motor of electric bicycle
  • Geared hub motor of electric bicycle
  • Geared hub motor of electric bicycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The electric bicycle has a gear hub motor with a rated voltage of 48V and a rated power of 200W. Step reduction planetary gear reduction mechanism 5 decelerates, and planetary gear reduction mechanism comprises planet carrier 37, duplex nylon planetary gear 38, central gear 23 and the sun gear ring gear 20 that is fixedly connected with motor, and the inner side of duplex planetary gear has convex block, convex gear. Bearings are installed on both sides of the gear, sleeved on the fixed shaft of the planet carrier, and locked by a circlip; the reduction ratio of the planetary gear reduction structure is set to 1:8.12; the disc-type iron-core DC motor adopts eight magnets There are 16 sector-shaped permanent magnets in total, the inner diameter of the permanent magnet is 47mm, the outer diameter is 91mm, and the axial height is 6mm. The winding of the stator disk 8 is composed of six coils 10, the diameter of the stator disk is 108mm, and the radial diameter of the coil 1...

Embodiment 2

[0043] The electric bicycle has a geared hub motor with a rated voltage of 48V, a rated power of 300W, and a 16-inch integrated hub. The driving motor is a 12-pole dual-rotor single-stator disc-type ironless DC motor with a permanent magnet inner diameter of 64mm and a radial length of 22mm. The number of winding branches is 3, the diameter of the stator disc 8 is 125mm, the radial diameter of the coil 10 is D=34mm, the height is 7.0mm, the diameter of the copper enameled wire is 0.60mm, the radial length of the ceramic triangular inner core 13 is 11.6mm, and the first-stage deceleration is adopted The planetary gear mechanism has a reduction ratio of 1:5 times. Table 1 shows the dynamometer test data of the prototype. It can be seen from the table that the highest efficiency of the prototype is 83.9%, and the input power from 58W to 542W is within the efficiency range of more than 70%. , the input power from 85W to 300W is in the high efficiency range of more than 80%, the eff...

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Abstract

The invention discloses a geared hub motor of an electric bicycle. The geared electric bicycle comprises a main shaft, a hub and an end cover which can be rotatably arranged on the main shaft, a driving motor and a reducing mechanism; the driving motor is a disk type coreless DC motor, and comprises two rotor disks rotatably arranged on the main shaft, a stator disk fixedly arranged on the main shaft, a permanent magnet is arranged at the inner side of each rotator disk and the air vents are formed on the rotator disks, and at least one rotator disk is provided with a wind catching device; coils and Hall sensors are arranged on the stator disk; the coils are wound on triangular inner cores of the nonmetallic material; three Hall sensor mounting slots and mounting holes of an annular circuit board are alternatively arranged on the stator disk; the coils and the Hall sensors are connected with a cable beam. Through the technical scheme disclosed by the invention, the hub motor is good instructure stability and excellent in leakproofness and radiating performance; the high efficiency feature of the disk type coreless DC motor at the low torque state is sufficiently utilized, and thecontinuation mileage of the electric bicycle is greatly improved.

Description

technical field [0001] The invention relates to a wheel hub motor of an electric bicycle, in particular to a gear hub motor of an electric bicycle, the driving motor of which is a disc-type coreless DC motor. Background technique [0002] Existing electric bicycles mostly use low-speed hub motors, which have the advantages of large motor power, generally no maintenance, and high transmission efficiency. However, due to the hysteresis resistance of such motors, the riding function of electric bicycles is weakened or even lost. Electric power-assisted bicycles have gradually embarked on a motorized and comfortable development route, and their driving motor power and driving speed far exceed the newly promulgated "Safety Technical Specifications for Electric Bicycles". [0003] In order to overcome the hysteresis resistance of the driving motor, the motor manufacturers represented by Bafang Motor have improved the internal rotor half-shaft geared hub motor of Japanese Yamaha el...

Claims

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Application Information

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IPC IPC(8): H02K16/02H02K1/32H02K5/10H02K7/00
Inventor 眭华兴眭重兴高波高峰
Owner 眭华兴
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