Unlock instant, AI-driven research and patent intelligence for your innovation.

A hub motor driven by a disc-type ironless DC motor

A technology of DC motors and wheel hub motors, applied in the field of electric motors, can solve the problems of motor jitter hysteresis, difficulty in limiting coil displacement, poor magnetic field concentration, etc., and achieve the effects of increased mileage, enhanced climbing ability, and high efficiency characteristics

Active Publication Date: 2019-04-19
CHANGZHOU INST OF TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A hub motor driven by a disc-type ironless DC motor
  • A hub motor driven by a disc-type ironless DC motor
  • A hub motor driven by a disc-type ironless DC motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Disk-type coreless DC motor, the winding is composed of 6 coils 20, the radial diameter of the coil 20 is D=32mm, the height is 10.0mm, the copper enameled wire diameter is 0.67mm, the radial length of the triangular hollow is 9.6mm, and 8 first The average inner and outer diameters of the permanent magnet 19 units are 68mm, the axial height is 6mm, and the radial length is 20mm. The hub adopts a planetary reduction mechanism with a reduction ratio of 1:8.74 for two-stage reduction. °, 41°, 38° for comparison test; Figure 9 is the torque and efficiency curve, a is the torque and efficiency curve when the central angle of the permanent magnet is 45°, b is the torque and efficiency curve when the permanent magnet central angle is 41°, c is the permanent magnet central angle is 38° When the torque and efficiency curves, from Figure 9From the torque efficiency curve shown, the highest efficiencies of the three motors are 83.8%, 83.1%, and 80.6% respectively. After leavin...

Embodiment 2

[0051] Disk-type unit laminated coreless DC motor, the winding on each stator disk is composed of 6 coils 20, the radial diameter of the coil 20 is D=32mm, the height is 10.0mm, the copper enameled wire diameter is 0.60mm, and the triangular hollow radial The length is 9.6mm, the average inner and outer diameters of the 8 permanent magnet units on each rotor disk are 68mm, the axial height is 6mm, and the radial length is 20mm. : 8.74 two-stage reduction of the planetary reduction mechanism, for comparative testing; Figure 11 Middle d is the curve diagram of torque and efficiency when the first power unit works alone, e is the curve diagram of torque and efficiency when the first power unit and the second power unit work simultaneously, Figure 11 It shows the torque efficiency curve diagram when the first power unit works and the first and second units work simultaneously in this embodiment of the disc-type unit laminated coreless DC motor of the present invention. From the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a wheel-hub motor driven by a disc type coreless direct current motor. The wheel-hub motor driven by the disc type coreless direct current motor comprises a left end cover, a right end cover, a main shaft and a wheel hub; the left end cover sleeves the main shaft through a first bearing and the right end cover sleeves the main shaft through a second bearing; the left end cover and the right end cover are connected with the wheel hub; the wheel hub is connected with a sun gear tooth ring through a speed reducing mechanism; the sun gear tooth ring is fixed on the motor and the motor drives the sun gear tooth ring to rotate, so that the speed reducing mechanism drives the wheel hub to rotate. Under the condition of keeping a through shaft structure, a planetary gear mechanism is used for reducing speed; the reliability of a wheel-hub motor structure and a high-speed performance of the disc type coreless direct current motor can also be sufficiently realized; the disc type coreless direct current motor has a high-efficiency property at a low-torque phase and a continuous range of an electric bicycle is greatly improved.

Description

technical field [0001] The invention relates to a wheel hub motor driven by a disk-type ironless DC motor and belongs to the field of electric motors. 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 existing national standards. Motorized electric bicycles, frequent traffic accidents, have become a social problem that needs to be solved urgently. [0003] In order to overcome the hysteresis resistance of the driving motor, motor manufacturers represented by Bafang Motor have introduced through-shaft high-speed hub motors. The rated power...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/24H02K7/116B60K7/00
CPCB60K7/0007B60K2007/0092H02K7/116H02K21/24
Inventor 高波查志琴眭华兴
Owner CHANGZHOU INST OF TECH