Overspeed protection method of electric automobile

An overspeed protection, electric vehicle technology, applied in electric vehicles, electrical devices, control drives, etc., can solve the problems of dangerous driving, no effective speed control, etc., to prevent overspeeding.

Active Publication Date: 2016-11-09
WM MOTOR TECH GRP CO LTD
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The electric vehicle provided by the prior art, when going downhill or when the downwind wind speed is too large, the actual speed during acceleration will exceed the actual required speed, causing driving danger. The prior art currently has no effective method for controlling the speed of the vehicle

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Overspeed protection method of electric automobile
  • Overspeed protection method of electric automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] The invention provides a method for overspeed protection of an electric vehicle, specifically based on such figure 1 The overspeed protection system shown includes the following steps:

[0020] S1: Collect the opening of the accelerator pedal and convert it into an analog accelerator signal and send it to the vehicle controller. The vehicle controller sends the accelerator analog signal to the accelerator interpretation module, and outputs the accelerator to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides an overspeed protection method of an electric automobile. The overspeed protection method comprises the following steps: (S1) outputting an accelerator torque request T2 through an accelerator explanation module; (S2) carrying out subtraction on an overspeed protection threshold value max_speed and a real-time speed speed, and then outputting a protection torque T1 through a third regulator PI3; (S4) carrying out valuation on a motor torque request T* through a torque arbitration module; (S5) if the motor torque request T* obtained in the step (S4) is larger than a maximum torque Tmax, limiting that T* is equal to Tmax, and otherwise, omitting the limitation; (S6) converting the motor torque request T* into requests of a quadrature axis current iq* and a direct axis current id*; (S7) acquire an actual quadrature axis current iq and a direct axis current id; (S8) obtaining a direct axis constant voltage ud* through a direct axis current regulator PI3; and (S9) substituting the quadrature axis voltage uq* and direct axis voltage uq* which are obtained in the step (S8) into voltage space vector pulse modulation, so as to obtain the switch state of each power switch tube, and finally finishing the driving of the motor through an inverter circuit. According to the overspeed protection method, the overspeed phenomenon in the acceleration process of the electric automobile can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of electric vehicle safety, in particular to an electric vehicle overspeed protection method. Background technique [0002] The electric vehicle provided by the prior art, when going downhill or when the downwind wind speed is too large, the actual speed during acceleration will exceed the actual required speed, causing driving danger. The prior art currently has no effective method for controlling the speed of the vehicle. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for overspeed protection of electric vehicles, which comprises the following steps: [0004] S1: Collect the opening of the accelerator pedal and convert it into an analog accelerator signal and send it to the vehicle controller. The vehicle controller sends the accelerator analog signal to the accelerator interpretation module, and outputs the accelerator torque re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/08B60L15/20
CPCB60L3/08B60L15/20Y02T10/72
Inventor 谢春林
Owner WM MOTOR TECH GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap