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Power motor auxiliary gear shifting control system and method

A power motor and control system technology, applied in the field of power motor auxiliary shift control system, can solve the problems of DC bus voltage impact, affecting the gear shift quality of the gearbox, and the service life of the power battery, so as to slow down the voltage drop and shorten the shift time , Improve the effect of shifting quality

Active Publication Date: 2016-07-06
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a power motor-assisted shift control system, which is used to solve the problem that the DC bus voltage impact caused by the rapid speed regulation of the power motor during the shift process affects the shift quality of the gearbox and the service life of the power battery

Method used

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  • Power motor auxiliary gear shifting control system and method
  • Power motor auxiliary gear shifting control system and method
  • Power motor auxiliary gear shifting control system and method

Examples

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Embodiment 1

[0042] Such as figure 1 As shown, a power motor auxiliary shift control system includes a gearbox control unit 1, a vehicle control unit 2, a motor control unit 3, an inverter 4, a phase current sensor 9, a position sensor 10, a power battery 5, and a power motor 6. Mechanical connection device 7 and gearbox 8;

[0043] The transmission control unit 1 is responsible for calculating the synchronous speed according to the current gear and the target gear, and sends a shift request and a synchronous speed command to the vehicle control unit;

[0044] The vehicle control unit 2 is responsible for receiving the shift request and synchronous speed from the gearbox control unit 1, and forwarding the speed command ω* to the motor control unit 3,

[0045] The motor control unit 3 includes a rotational speed detection unit 33, a PI control unit 31, a speed-up / down mode judgment unit 32, a rectangular axis current command look-up unit 34, and a field oriented vector (Field Oriented Cont...

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Abstract

The invention discloses a power motor auxiliary gear shifting control system and method. A PI control unit is introduced in the gear shifting control system, and PI control over the rotation speed of a motor is carried out to solve the problem that the voltage surge caused by rapid speed adjustment of the motor in the gear shifting process is not taken into consideration in the prior art; due to the limitation of the whole gear shifting synchronization time, the power motor coupled with an input shaft of a gearbox needs to finish speed adjustment of about hundreds of turns within hundreds of milliseconds; and under the condition that the voltage of a battery end is high, the large voltage surge is caused by the instantaneous energy feedback of the battery end, overvoltage damage to an inverter is even caused, consequently gear shifting synchronization fails, tooth collision of the gearbox is caused, the gear shifting quality is affected and the service life of the gearbox and a battery is shortened. Therefore, the restraint on the voltage in the gear shifting speed adjusting process is an effective measure for guaranteeing reliable gear shifting and prolonging the service life of the gearbox and the battery.

Description

technical field [0001] The invention belongs to the technical field of power motor shift control, and in particular relates to a power motor auxiliary shift control system and method. Background technique [0002] In recent years, hybrid and pure electric vehicles have been widely used, and the motor is one of the main power sources. It can be directly or indirectly coupled with the engine, gearbox, reducer, differential and wheels to achieve hybrid Various functions required by power or pure electric vehicles, especially through the mechanical coupling of the power motor and the multi-speed gearbox, can realize the coordinated control of the motor and the gearbox, improve the synchronous shift time, reduce the impact between the gears, and prolong the service life . [0003] Application number: CN201120032921.8 patent discloses "A Synchronous Shift Control System for Electric Vehicles". This invention designs a clutch control mechanism driven by a DC brush motor. The moto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/08B60W10/11B60W30/19
CPCB60W10/08B60W10/11B60W30/19B60W2710/081
Inventor 文彦东胡晶刘志强赵慧超王宇
Owner CHINA FIRST AUTOMOBILE
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