Motor structure for electric wheelchairs
A motor structure, electric wheelchair technology, applied in the direction of electric components, magnetic circuit shape/style/structure, patient's chair or special transportation tools, etc., can solve the problems of large electromagnetic interference, unstable contact resistance, large power shock, etc. Achieve the effect of good control and safety, smooth magnetic field waveform, and small electromagnetic interference
Active Publication Date: 2017-02-15
DONG XING CHANG TECHNOLOGY (SHENZHEN) CO LTD
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Problems solved by technology
Because the magnetic field waveform of the stator in the existing brushed motor is not smooth and the electromagnetic interference is large, the current of the motor is relatively large when the motor is started, the time constant is long, and the impact on the power supply is large, so that the control and safety of the motor and the electric wheelchair are improved. Poor performance and short service life; at the same time, when the existing brushed motor is running, the contact resistance between the carbon brush and the commutator is large, and the contact resistance is unstable, which affects the operating efficiency of the motor
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[0021] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be further described below in conjunction with the accompanying drawings.
[0022] like Figure 1 to Figure 4 As shown, a motor structure for an electric wheelchair includes a housing 30, a front end cover 10 fixed to the front end of the housing 30, a rear end cover 40 fixed to the rear end of the housing 30, and a rotating shaft 501, which is sleeved outside the rotating shaft 501 and fixed to the rotating shaft 501 The connected rotor 50, the commutator 70 that is sleeved on the outside of the rotating shaft 501 and electrically connected to the rotor 50, the brush power supply end 60 that is fixed on the front cover 10 and contacts the commutator 70, and includes several Tile-shaped magnet 20, the section of tile-shaped magnet 20 is a structure symmetrical about its axis, tile...
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The invention discloses a motor structure for electric wheelchairs, comprising a shell, a front end cover, a rear end cover, a shaft, a rotor, a commutator which sleeves the shaft and is electrically connected with the rotor, and a brush power supply end which is fixed on the front end cover and contacts the commutator. The motor structure further comprises a plurality of tile-shaped magnets around the rotor. The cross section of each tile-shaped magnet is of a structure symmetric about the axis thereof. Each tile-shaped magnet includes an inner arc surface and an outer arc surface, the center of circle corresponding to the inner arc surface and the center of circle corresponding to the outer arc surface are in the same straight line, and there is a distance between the two centers of circle. The advantages are as follows: as the center of circle corresponding to the inner arc surface and the center of circle corresponding to the outer arc surface are in the same straight line and there is a distance between the two centers of circle, the waveform of the magnetic field produced by the tile-shaped magnets is smooth, electromagnetic interference is small, the starting current of motors is small, the time constant is small, the impact on the power supply is small, and motors and electric wheelchairs have good sense of control, high safety and a longer service life.
Description
technical field [0001] The invention relates to the technical field of motors, in particular to a motor structure for electric wheelchairs. Background technique [0002] At present, most of the electric wheelchair industry uses traditional brushed motors as the power source. Because the magnetic field waveform of the stator in the existing brushed motor is not smooth and the electromagnetic interference is large, the current of the motor is relatively large when the motor is started, the time constant is long, and the impact on the power supply is large, so that the control and safety of the motor and the electric wheelchair are improved. The performance is not good, and the service life is short; at the same time, when the existing brushed motor is running, the contact resistance between the carbon brush and the commutator is large, and the contact resistance is unstable, thereby affecting the running efficiency of the motor. Contents of the invention [0003] The purpos...
Claims
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IPC IPC(8): H02K1/27
CPCH02K1/2706H02K2213/03H02K27/00H02K1/17A61G5/04H02K13/006H01R39/04
Inventor 蓝少强
Owner DONG XING CHANG TECHNOLOGY (SHENZHEN) CO LTD