A torque distribution method for dual-motor structure of new energy electric vehicle
A technology for electric vehicles and torque distribution, applied in the direction of electric vehicles, motors, electrical devices, etc., can solve problems such as limited power improvement and energy consumption optimization effects, uneven power output shifting, and immature industrial chains, etc., to achieve structural Simple, reduce vehicle energy consumption and improve driving efficiency
Active Publication Date: 2022-07-08
HOZON NEW ENERGY AUTOMOBILE CO LTD
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Problems solved by technology
[0003] Disadvantages: 1. The cost of single-motor double-speed ratio increases by about 800-1000 yuan / vehicle, and there is the problem of uneven power output shifting, and the effect of power improvement and energy consumption optimization is limited
2. The existing multi-motor-multi-speed ratio hybrid structure industry chain is immature, the control is complex, and the cost performance is not high. It is only used in a few models such as Marvel X
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[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0035] combine Figure 1 to Figure 4 , the present invention is described in detail. The dual motor structure of a new energy electric vehicle involved in the present invention includes a central main shaft 1, a permanent magnet synchronous motor 2, an asynchronous motor 3 and a single-speed ratio reducer system 4 connected to the central main shaft; the permanent magnet The synchronous motor 2 and the asynchronous motor 3 drive the central main shaft 1 to rotate, and the central main shaft 1 is connected to the single-speed ratio reducer system 4 by transmission.
[0036] The asynchronous motor 3 and the permanent magnet synchronous motor 2 are located on both sides of the single-speed ratio reducer system 4 . The asynchronous motor 3 is connected with the synchronous motor speed sensor for controlling the speed difference. The permanent magn...
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The invention discloses a torque distribution method for a dual-motor structure of a novel energy electric vehicle, wherein the dual-motor structure comprises a central main shaft, and a permanent magnet synchronous motor, an asynchronous motor and a single-speed ratio reducer system connected with the central main shaft; The permanent magnet synchronous motor and the asynchronous motor drive the central main shaft to rotate, and the central main shaft is drive-connected with the single-speed ratio reducer system. And the torque distribution method is determined according to the method of calculating the efficiency value. High-efficiency permanent magnet synchronous motors and asynchronous motors are used in the dual motors; the specific power of the motors needs to be determined according to the matching vehicle operating conditions. The asynchronous motor uses the synchronous motor speed sensor signal to control the speed difference, which can improve the efficiency control accuracy of the permanent magnet synchronous motor. Decoupling the throttle signal according to the driver's intention determines the torque response area to improve driving efficiency. It can effectively improve the efficiency of the transmission system and reduce the energy consumption of the whole vehicle.
Description
technical field [0001] The invention relates to the technical field of new-energy electric vehicles, in particular to a torque distribution method of a dual-motor structure of a new-energy electric vehicle. Background technique [0002] At present, the electric drive system of pure electric vehicles is mainly based on the structure of a single motor and a single speed ratio. A single permanent magnet synchronous motor is mainly used in China, and asynchronous motors are mainly used in European and American countries. There are two main development directions of the current electric drive system: one is to develop wheel-side motors or in-wheel motors to reduce the mechanical loss of intermediate speed change and shaft transmission, and the efficiency is high, but it has not been popularized due to factors such as reliability; the other is to develop more Speed ratio or multi-motor new drive structure. Some single-motor-two-speed ratio structures have also been mass-produce...
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IPC IPC(8): B60L15/28B60L15/32
CPCB60L15/28B60L15/32B60L2220/10B60L2220/14B60L2220/42B60L2240/423Y02T10/72
Inventor 龚春忠张永王可峰何浩张洪雷李佩佩
Owner HOZON NEW ENERGY AUTOMOBILE CO LTD