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Electric actuator and driving and braking method thereof

An electric device, power modulation technology, applied in the direction of motor control, electric motor/converter plug, electrical components, etc., to achieve the effect of simple structure, energy saving and low cost

Inactive Publication Date: 2016-06-01
杭州磁控科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of the power supply mode of the existing DC motor for electric vehicles, and provide a power supply scheme that changes the DC power into a sequential current through a power modulator. At the same time, the internal structure of the electric device is different from the traditional motor design , simple structure, large torque, easy process

Method used

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  • Electric actuator and driving and braking method thereof
  • Electric actuator and driving and braking method thereof
  • Electric actuator and driving and braking method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0090] An electric device of a power-assisted electric two-wheeled vehicle is arranged on the rear wheel of the vehicle, and the local structure of the vehicle frame 4 is as follows: Figure 2b As shown, the circumference of the wheel is 1000 mm, the battery pack 8 is a lithium iron phosphate battery, and the battery pack 8 is installed inside the vehicle frame. The fixed body 5 of the electric device is designed as a disc with a fixed shaft outside, and the external mechanical parameters of the fixed shaft are designed with reference to the data of the conventional electric two-wheel wheel shaft, and are used to replace the conventional two-wheel wheel shaft for installation; the rotating body 6 of the electric device is An annular titanium-aluminum alloy ring with a rotating shaft and a circumference of 100mm can be coaxially set on the outside of the fixed body of the disc; a stator unit 3a is installed on the fixed body of the disc; a The deceleration / torque conversion dev...

Embodiment 2

[0096] Change the sequential current of the power modulator of the electric device in embodiment 1 to: T 1 The power-on time domain is set to a constant current corresponding to two periods of time and intensity, and the characteristic is the current intensity I of the last 1 / 2 time 2 / A is the current intensity I of the previous 1 / 2 time 1 / A half; the working logic of the power modulator is adjusted as follows: when the winding of the stator unit is energized, the power modulator 1 starts within 3s with I 1 Intensity 10A (corresponding to I 2 5A) as the reference, corresponding to the rotation cycle of the swivel body, the current sequence of automatically increasing the output intensity by 10% every next cycle, the ratio of the two power-on times is 1:1; wait for the next step of the drive control device from the 4th second Command: If there is no input command from the drive control device, the power supply modulator will sleep; if the drive control device gives an accel...

Embodiment 3

[0099] On the basis of the electric device in embodiment 2, optimize the energization program of the power modulator: the T 1 The power-on time domain is set to 5 stages of current with the same power-on time but the current intensity decreases regularly, and the power-on intensity of the 5 stages is according to K*I 1 The linear relationship of / A decreases step by step, and the decrease coefficient K is 0.68, that is, T 1 The current intensities of the 5 stages of power-on time in the sequence are 12.0A, 8.2A, 5.6A, 3.8A, and 2.6A, respectively. The power-on program logic uses conventional electronic circuits to realize the control design, which is more complicated and the manufacturing cost is also higher. The power modulator is changed to a mature pulse digital technology.

[0100] The core module of the power modulator 1 of the electric device includes a conventional CPU and a drive module with a design power of 500W, and its detailed working logic is as follows: Figur...

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Abstract

An electric actuator of the present invention comprises a power supply modulator (1), a decelerating / torque changing device (2), a driving, operating and controlling device (9a), a fixing body (5) and a rotating body (6), the rotating body is an annular mechanical ring possessing a rotation shaft, and a plurality of rotor units (3b) which are made of magnetic conductive materials are arranged on the rotating body at intervals. The fixing body is a mechanical disc possessing a fixing shaft, and at least one stator unit (3a) is arranged inside the fixing body and is installed at the position close to the rotating body. The fixing body and the rotating body are arranged coaxially, and a relative air gap of the fixing body and the rotating body is not more than 30 mm. The decelerating / torque changing device (2) is coaxial with the rotating body and is arranged outside the rotating body, the power supply modulator obtains a driving / braking instruction via the driving, operating and controlling device and outputs a current to a winding of the stator unit at a corresponding timing sequence, and the electric actuator realizes the mechanical transmission with a hub via the decelerating / torque changing device (2). The electric actuator of the present invention is simple in structure and low in cost, and can adapt to the energy-saving design requirements of the electric vehicles effectively.

Description

technical field [0001] The invention relates to the field of power supply design for electric vehicles, in particular to a power supply modulator that periodically generates sequential current and a design method for the driven electric device. Background technique [0002] At present, the domestic electric bicycle market is usually equipped with a motor installed on the wheel shaft. The motor is designed as an outer rotor. The outer rotor is mechanically connected to the rim of the wheel through the spokes, and the wheel is rotated by the torque of the motor. In specific manufacturing, the mainstream of the market is to integrate the spokes and the rim of the wheel. The appearance is an electric wheel, and the spokes are transformed into force-transmitting ribs, and the torque of the motor is transmitted to the rim through the force-transmitting ribs. The domestic motor industry is also trying to use the successful experience in the technology of electric bicycles to promot...

Claims

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Application Information

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IPC IPC(8): H02P29/00H02P3/06
Inventor 刘粤荣
Owner 杭州磁控科技有限公司
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