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Electric vehicle motor and rear axle concentricity correction device

A technology for electric vehicles and calibration devices, applied in electric vehicles, manufacturing motor generators, electromechanical devices, etc., can solve problems such as difficulty in adjustment, increase transmission friction, vibration and noise, and achieve the goal of shortening adjustment time and improving accuracy. Effect

Inactive Publication Date: 2019-11-08
江苏众志达新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The rotation system of electric vehicles mostly adopts the direct transmission method of motor + rotating shaft + rear axle. The axis of the motor drive shaft and the drive shaft of the rear axle will change when the electric vehicle is running. Stable, causing vibration and noise, and will increase the friction force in the transmission process, resulting in power loss. At present, it mainly relies on manual adjustment with the help of external instruments and experience. On the one hand, it is difficult to grasp when it needs to be adjusted, and on the other hand, it is prone to under-adjustment Or the phenomenon of over-adjustment, the accuracy is not accurate

Method used

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  • Electric vehicle motor and rear axle concentricity correction device
  • Electric vehicle motor and rear axle concentricity correction device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, the electric vehicle motor and the rear axle concentricity correction device include an X-direction correction circuit and a Y-direction correction circuit, wherein the principle of the X-direction correction circuit is the same as that of the Y-direction correction circuit. The X-direction correction circuit will be described in detail below, so The X direction correction circuit includes a motor axis and a rear axle axis X direction deviation circuit, an X direction deviation signal processing circuit and an X direction zero point adjustment circuit, and the motor axis and the rear axle axis X direction deviation circuit will detect the motor The axis X position signal and the rear axle axis X position signal are calculated by the subtractor with the operational amplifier AR1 as the core to calculate the deviation signal, and the LC filter composed of the parallel connection of the inductor L1 and the capacitor C3 is filtered and then sent to the X directi...

Embodiment 2

[0017] Embodiment 2, on the basis of Embodiment 1, the X-direction deviation signal processing circuit uses the window circuit principle to subtract the axis deviation value from the positive and negative deviation signals allowed by the inverting input terminals of operational amplifiers AR2 and AR3 The positive and negative deviation values ​​are calculated by calculation, including operational amplifiers AR2 and AR3. The filtered deviation signal flows into the X direction deviation signal processing circuit in two ways, and one way flows into the non-inverting input terminal of the operational amplifier AR2, and the inverting input terminal The voltage corresponding to the corresponding allowable forward deviation signal (provided by the voltage divider circuit composed of resistors R5 and R6) is subtracted to calculate the forward deviation value, and then sent to the X direction after unidirectional conduction through the parallel diode D1 and resistor R8 In the zero poin...

Embodiment 3

[0018] Embodiment 3, on the basis of Embodiment 2, the X-direction zero-point adjustment circuit is used to send the positive and negative deviation values ​​sent by the X-direction deviation signal processing circuit, through the voltage-time converter with the NE555 chip as the core , output the high and low levels corresponding to the time length of the positive and negative deviation values, including NE555 chips U1 and U2, and the positive deviation value signal after diode D1 and resistor R8 conduct one-way conduction through NE555 chip U1 and electrolytic capacitor E1 and E2, resistor R9 are converted into a +5V high-level signal for a certain period of time, providing base bias voltage for the NPN drive transistor Q2, the emitter of the NPN drive transistor Q2 is grounded, and the electrolytic capacitor E5 is used to filter out external high frequencies Interference signal, at this time, the drive triode Q2 is saturated and turned on, the collector potential is pulled d...

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Abstract

The invention discloses a concentricity correction device for a motor and a rear axle of an electric vehicle. An X-direction correction circuit comprises a motor axis and rear axle axis X-direction deviation circuit, an X-direction deviation signal processing circuit and an X-direction zero point adjustment circuit, a deviation signal is calculated by subtracting a rear axle axis X-position signalfrom a motor axis X-position signal, a positive deviation value and a negative deviation value are respectively calculated by subtracting a positive deviation signal and a negative deviation signal which are allowed by reverse-phase input ends of operational amplifiers AR2 and AR3 from the signal, deviation can be timely found out by positive zero point adjustment and negative zero point adjustment, and the adjustment time is shortened; the sizes of the positive deviation value and the negative deviation value are subjected to a voltage-time converter with an NE555 chip as a core, a high level and a low level corresponding to proportional duration are output, a triode is driven to be switched on, so that a coil of a relay K2 or K1 is energized; and X-direction zero-point adjustment is performed by positive rotation or reverse rotation of the motor, the concentricity adjustment accuracy can be effectively improved, and kinetic energy of the motor is enabled to be stably transferred tothe rear axle.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a concentricity correction device for electric vehicle motors and rear axles. Background technique [0002] With the development of modern automotive electronics technology, the emergence of new energy vehicles and electric vehicles has undoubtedly injected a fresh and challenging blood into the entire industry. By virtue of reducing the emission of many wastes and harmful gases, the life of the whole society is greatly improved. The environment has a great improvement effect, has been highly valued by the society and the country, and has a good development prospect. [0003] The rotation system of electric vehicles mostly adopts the direct transmission method of motor + rotating shaft + rear axle. The axis of the motor drive shaft and the drive shaft of the rear axle will change when the electric vehicle is running. Stable, causing vibration and noise, and will increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/00H02K15/14G01B5/252
CPCG01B5/252H02K15/0006H02K15/14Y02T10/64
Inventor 杨欣禇慧
Owner 江苏众志达新能源科技有限公司