Control method for frequency converter DCAC of air braking system of pure electric vehicle

A pure electric vehicle, pneumatic braking technology, applied in electric braking systems, electric vehicles, vehicle components, etc., can solve the problems of inability to diagnose the DCAC fault of the inverter, unable to obtain the feedback information of the inverter DCAC, etc., and improve the reliability of the system. Improve the stability and maintainability, convenient and quick fault diagnosis, stability and scalability

Inactive Publication Date: 2014-04-30
BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

However, air pressure braking must have air compressors, air storage tanks, brake valves and other devices. The air compressor is powered by a motor, and the motor of the vehicle braking system needs to be controlled by a frequency converter DCAC. The exi

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  • Control method for frequency converter DCAC of air braking system of pure electric vehicle

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Embodiment Construction

[0027] Such as figure 1 As shown, the control flow diagram of a frequency converter DCAC of a pure electric vehicle air braking system described in the embodiment of the present invention, when the vehicle is in a normal state, according to the high and low voltage power-on situation of the vehicle control system, the air braking system frequency converter DCAC Feedback state, follow the steps below to control the frequency converter DCAC of the air brake system:

[0028] Step 1) The vehicle control system is powered on with low voltage, and the vehicle controller is powered on and initialized. After the initialization is completed, the vehicle controller sends the low-voltage relay pull-in command, and the low-voltage relay sends the air pressure brake system inverter through a hard wire. Controller power supply;

[0029] Step 2) The vehicle controller receives vehicle signals through the hardware interface or vehicle CAN network, such as: accelerator pedal signal, brake sig...

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Abstract

The invention relates to a control method for a frequency converter DCAC of an air braking system of a pure electric vehicle. Fault state feedback of the frequency converter DCAC is introduced while effective control on the frequency converter DCAC of the air braking system is realized through a CAN (controller area network) communication mode, so that fault diagnosis and fault code management of the frequency converter DCAC are realized. The control method has the advantages that substantial field tests show that compared with conventional rigid-line open-loop control method, the control method based on CAN communication and state feedback has the advantages that stability and expansibility of a vehicle braking system are remarkably improved; through fault state signals, fault diagnosis of the braking system is realized conveniently and rapidly, troubleshooting of aftersales personnel is facilitated, and system reliability and maintainability are improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a DCAC control method for a frequency converter of a pneumatic brake system of a pure electric vehicle. Background technique [0002] With the increasing shortage of international crude oil resources and the increasingly stringent requirements on vehicle emissions caused by environmental pollution, new energy vehicles have gradually become a core research and development direction of major automobile manufacturers. In the "Twelfth Five-Year Plan", the development of new energy vehicles has become a key development project of the country, which has received great attention and strong support from the country. The national high-tech research and development plan (863 plan) also focuses on new energy vehicles and related projects, fully supporting the development of new energy vehicles and related industries. Under the guidance of various preferential policies and inc...

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Application Information

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IPC IPC(8): B60L7/00
Inventor 李忠志张君鸿姜炜王帅宇
Owner BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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