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A pure electric drive axle based on counter-rotating dual-rotor motors and hub motors and its control method

A dual-rotor motor, in-wheel motor technology, which is applied in control devices, electric power devices, power devices, etc., can solve problems such as difficulty in meeting high-power power requirements, limited motor power and heat dissipation, and affecting vehicle performance. Achieve the effect of improving vehicle economy, improving handling stability and wide range of models

Active Publication Date: 2022-04-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The hub motor drives the electric vehicle to save the clutch, differential, gearbox and other transmission components, which improves the transmission efficiency, and it is easy to achieve differential speed and full-time four-wheel drive. However, since the motor and the reduction mechanism are installed in the hub, the The unsprung mass increases, and the hub motor is also limited by the space of the wheel, which limits the power and heat dissipation of the motor, making it difficult to meet the demand for high power and affect the performance of the vehicle

Method used

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  • A pure electric drive axle based on counter-rotating dual-rotor motors and hub motors and its control method
  • A pure electric drive axle based on counter-rotating dual-rotor motors and hub motors and its control method
  • A pure electric drive axle based on counter-rotating dual-rotor motors and hub motors and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 Shown is a specific embodiment 1 of a pure electric drive axle based on a counter-rotating dual-rotor motor and an in-wheel motor and its control method.

[0044] The inner rotor 1-2 of the counter-rotating twin motor 1 is connected with the sun gear 4-7 of the planetary mechanism 4 through the first-stage fixed shaft gear transmission pair 2, the second brake 3-1, and the first brake 3-1 can counter-rotate double The output of the inner rotor 1-2 of the rotor motor is controlled, and the rotor 7-1 of the hub motor 7 is connected with the ring gear 4-3 of the planetary mechanism 4, and the second brake 3-1 can control the output of the ring gear 4-3 and the hub motor 7. The output is controlled, the planet carrier 4-5 of the planetary mechanism 4 is connected with the rim 6-1 through the transmission shaft, the brake caliper 8-1 of the third brake 8 is installed on the motor housing of the hub motor 7, and the brake disc 8- 2 is connected with the tran...

Embodiment 2

[0120] Such as Figure 7 Shown: this embodiment is different from embodiment 1 in that: the first brake 3-1, 3-2 in embodiment 1 is removed. This embodiment can realize the two kinds of motor power coupling working modes, counter-rotating dual-rotor motor driving mode, counter-rotating dual-rotor motor regenerative braking working mode and corresponding reversing working mode of Example 1. Its specific working principle and speed ratio The calculation is the same as in Example 1, and will not be repeated here.

Embodiment 3

[0122] Such as Figure 8 Shown: This embodiment removes the structural principle diagram of the second brake 5-1, 5-2 on the basis of the implementation example 1.

[0123] This implementation example can realize the two motor power coupling working modes, hub motor driving mode, hub motor regenerative braking mode and corresponding reversing working mode in the implementation example 1. The same, will not be repeated here.

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Abstract

The invention discloses a pure electric drive axle based on a counter-rotating double-rotor motor and a hub motor and a control method thereof. The drive axle mainly includes: counter-rotating double-rotor motor, hub motor, planetary mechanism, brake, fixed shaft gear pair, etc. The sun gear and the ring gear of the three elements of the planetary mechanism are used as two input ends or one of the elements is fixed as the input end and the other is fixed, and the planet carrier is used as the output end. The inner rotor of the counter-rotating dual-rotor motor is connected to the sun gear of the left planetary mechanism through the fixed shaft gear pair, the outer rotor is connected to the sun gear of the right planetary mechanism, and the hub motors on both sides are respectively connected to the ring gear of the corresponding side planetary mechanism. The planetary carriers on both sides are respectively connected to the rims on the corresponding sides through the transmission shaft as output ends. This structure can not only reduce the unsprung mass, improve the ride comfort, comfort and handling stability of the vehicle, and meet the high power requirements of vehicles under high-power conditions, but also can realize multiple modes to make the power source work In the high-efficiency zone, improve vehicle economy.

Description

technical field [0001] The invention relates to a vehicle drive axle and a control method thereof, in particular to a pure electric drive axle based on a counter-rotating double-rotor motor and a hub motor and a control method thereof. Background technique [0002] Petroleum resources are constantly decreasing, and the exhaust gas emitted by traditional internal combustion engine vehicles pollutes the environment. The proportion is getting bigger and bigger, and it will eventually replace the position of traditional cars. [0003] The hub motor drives the electric vehicle to save the clutch, differential, gearbox and other transmission components, which improves the transmission efficiency, and it is easy to achieve differential speed and full-time four-wheel drive. However, since the motor and the reduction mechanism are installed in the hub, the The unsprung mass increases, and the hub motor is also limited by the space of the wheel, which limits the power and heat dissip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K1/02B60K7/00B60K17/04
Inventor 谭迪刘帅帅
Owner SHANDONG UNIV OF TECH