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Dual-motor three-gear variable speed drive device for electric vehicle

An electric vehicle, three-speed transmission technology, applied in control devices, vehicle components, transportation and packaging, etc., can solve the problems of insufficient high-speed power, low-speed efficiency, etc., to avoid high-speed whistling, improve efficiency, and make up for high-speed power The effect of sexual inadequacy

Active Publication Date: 2019-04-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defects of low-speed efficiency and insufficient high-speed power of electric vehicles, and eliminate the defects of power interruption during the shifting process, the present invention provides a dual-motor three-speed variable-speed driving device for electric vehicles

Method used

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  • Dual-motor three-gear variable speed drive device for electric vehicle

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Embodiment

[0031] see figure 1 A dual-motor three-speed variable-speed driving device for an electric vehicle includes a main motor 2, an auxiliary motor 1, and a three-speed transmission mechanism. The power of the main motor 2 is 30kw, which is suitable for low speed and high torque, and the power of the auxiliary motor 1 is 20kw, which is suitable for high speed and small torque, and both are permanent magnet synchronous motors.

[0032] The three-speed transmission mechanism includes a first shaft 4 , a second shaft 5 , a first gear 6 , a second gear 7 , a third gear 8 , a fourth gear 9 , a fifth gear 10 and a ring gear 11 .

[0033]The first gear 6 and the third gear 8 are installed on the first shaft 4 through the spline connection; the second gear 7, the fourth gear 9 and the fifth gear 10 are installed on the second shaft 5 through the bearing empty sleeve; the fourth gear 9 and the fifth gear 10 are conjoined gears, and a synchronizer 12 is installed on the second shaft 5 betwe...

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Abstract

The present invention relates to a dual-motor three-gear variable speed drive device for an electric vehicle. The dual-motor three-gear variable speed drive device comprises a main motor, an auxiliarymotor and a three-gear transmission mechanism, wherein the main motor is a low-speed high-torque motor; the auxiliary motor is a high-speed small-torque motor; a synchronizer of the three-gear transmission mechanism is correspondingly provided with a low-speed gear, a neutral gear and a high-speed gear, respectively. When the synchronizer is located in the neutral gear, the auxiliary motor is separately driven; when the synchronizer is meshed with a fourth gear of the three-gear transmission mechanism, the single-motor drive or the dual-motor drive is selected; when the synchronizer is meshedwith a second gear of the three-gear transmission mechanism, the single-motor drive or the dual-motor drive is selected; five drive modes are implemented in total. According to the dual-motor three-gear variable speed drive device for the electric vehicle, the average efficiency of the dual-motor three-gear transmission motor is 92.31%; with reasonable matching of the drive system gear position and optimization of the drive system, the proportion of the motor operating in the more efficient interval is increased; and the mechanism has high application value is in a commercial vehicle with a large load capacity change.

Description

technical field [0001] The invention relates to electric vehicle drive technology, in particular to a dual-motor three-speed variable-speed driving mechanism for an electric vehicle. Background technique [0002] Electric drive system is the core component of electric vehicles. The main evaluation indicators are characterized by power, safety, ride comfort, and economy. These indicators are directly related to the quality of the power transmission system and determine the quality of the vehicle. The technical development direction of the new energy vehicle variable speed drive industry mainly comes from the requirements of high efficiency, light weight and easy layout of the vehicle system. The integration, efficiency improvement and cost reduction of the electric drive system are more in line with market demand. [0003] The electric vehicle drive system has changed from the original motor direct drive solution to another mainstream drive solution, which is to drive the mo...

Claims

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Application Information

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IPC IPC(8): B60K17/08
CPCB60K17/08
Inventor 王兵吴景铼陈永忠
Owner HEFEI UNIV OF TECH
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