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Wheel hub one-piece electric device and driving and braking method thereof

A technology of electric devices and hubs, applied in the direction of electromechanical devices, power devices, electric vehicles, etc., can solve the problems of limitations, low weight/volume ratio, low power, and few types, and achieve the effect of low cost and simple structure

Inactive Publication Date: 2016-06-01
广东捷翔动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this waterwheel model was translated to the field of electric vehicles, it did not achieve the expected development success
For example, an electric bicycle with teeth on the outer edge of the rim and an output shaft toothed motor installed on the market transmits the shaft output power of the motor through the gears. Although this type of design is innovative, due to the use of traditionally designed motors and conventional Power supply, its electric energy conversion efficiency is similar to that of the hub motor, and setting the motor on the outer edge of the rim will be limited by power
[0007] In the electric four-wheel vehicle market, the current mainstream idea of ​​developing high-power wheel-hub motors is to install the motor inside the wheel hub. Because the weight / volume ratio of conventional motors is low, the weight of the wheel hub increases greatly, and the practical power consumption index is not high. Low, and the cost performance is not high, and there are fewer types of products in the market

Method used

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  • Wheel hub one-piece electric device and driving and braking method thereof
  • Wheel hub one-piece electric device and driving and braking method thereof
  • Wheel hub one-piece electric device and driving and braking method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] A wheel hub electric device of an electric two-wheeled vehicle with a front and rear wheel structure. Figure 1a In the frame 4 shown, the circumference of the wheel 5 is 1000 mm, the battery pack 8 is a lithium iron phosphate battery, and the battery pack 8 is installed inside the frame 4; the wheel hub conjoined electric device is arranged on the rear wheel of the car. The coaxial rotating body 3e of the electric device 3 is an annular titanium-aluminum alloy ring with a rotating shaft and a circumference of 300mm. The outer edge of the alloy ring is fixedly connected to a rotor unit 3b, and the mechanical device is fixedly connected to the fixed shaft inside the alloy ring On the upper side, a stator unit 3a is installed; the coaxial rotating body 3e is installed coaxially with the hub 6, and a reduction / torque conversion device 2 composed of several gears is arranged in between, and the reduction / torque conversion device 2 realizes the connection with the hub 6 Mechani...

Embodiment 2

[0101] Change the timing current of the power supply modulator in Example 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 in the first 1 / 2 time 1 / A half; the working logic of the power modulator is adjusted at the same time as: when the stator unit winding starts to be energized, the power modulator will change to I within 5s 1 Strength 16A (corresponding to I 2 It is 8A) as the reference, corresponding to the current sequence of the wheel rotation cycle to automatically increase the output intensity by 10% every next cycle, the relative ratio of the two power-on time domains is the set 2:1; wait for driving control from the 6th second The next work instruction of the device 9: if there is no input instruction from the drive control device 9a, the power modulator 1 sleeps; if the instruction given by the drive c...

Embodiment 3

[0104] Optimize the power-on procedure of the power modulator on the basis of embodiment 2: change T 1 The energization time domain is set to 5 segments of current with the same energization time but the current intensity decreasing regularly, and the 5 segments of energization intensity is K*I 1 The linear relationship of / A decreases gradually, and the decrease coefficient K is 0.7, which is T 1 The current intensities of the 5 energizing periods in the sequence are 20.0A, 14.0A, 9.8A, 6.9A, 4.8A, respectively. The design of power-on program logic using conventional electronic circuits to achieve control is more complicated, and the manufacturing cost is also higher. The power modulator is changed to a mature pulse digital technology. .

[0105] The core module of the power modulator includes a conventional CPU and a drive module with a design power of 500W. Its detailed working logic is as Figure 5b As shown, the pulse conversion conditioning circuit mainly completes the conve...

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Abstract

The invention discloses a wheel hub one-piece electric device of an electric vehicle, and the device includes a wheel hub (6), a speed reducing / torque changing device (2), a power supply modulator (1), a drive control device (9a) and at least one set of electric device (3). Each electric device includes a coaxial rotating body (3e), at least one stator unit (3a) and at least one magnetizer rotor unit (3b); the coaxial rotating body is an annular mechanical ring having a rotating shaft, and the rotor units are arranged on the coaxial rotating body; the stator units are installed inside or outside the coaxial rotating body; the coaxial rotating body and the wheel hub are coaxially arranged, and realizes mechanical transmission with the wheel hub through the speed reducing / torque changing device; and a timing sequence current output end (1b) the power supply modulator is connected with inner windings of the stator units, and a drive signal input end (1d) is connected with the drive control device. The wheel hub one-piece electric device provided by the invention is simple in structure, and can realize diversified combinations on a wheel, the torque is large, the cost is low, and an energy-saving effect is obvious.

Description

Technical field [0001] The invention relates to the field of power supply power design for electric vehicles, in particular to a structure and a driving and braking method of an electric device, including a power modulation method of periodic on-off current and sequential power supply amplitude conversion. Background technique [0002] At present, the electric vehicles on the market are mainly two-wheeled vehicles. The number of electric two-wheeled vehicles in my country has reached more than 150 million. In addition to two-wheeled vehicles, electric tricycles have also risen rapidly in recent years. According to industry intelligence, it has exceeded 10 million in 2013. The market for low-speed electric four-wheeled vehicles for regional use has also made considerable progress. [0003] The motors used in electric vehicles are currently developing from general-purpose to professional design, and their power supply controllers are also trying to use pulse modulation technology to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K7/00H02K7/10B60K7/00B60L15/20
CPCY02T10/64Y02T10/72
Inventor 刘粤荣
Owner 广东捷翔动力科技有限公司
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