Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for reducing loss of electromobile vehicle-mounted inverter and improving current output capacity of electromobile vehicle-mounted inverter

A vehicle-mounted inverter and output capability technology, which is applied in the direction of converting irreversible DC power input into AC power output, can solve the problems of large heat dissipation load of the cooling system, load asymmetry, high inverter loss, etc., and achieve higher current Output capacity, improve efficiency, and reduce heat generation

Inactive Publication Date: 2012-03-07
UNITED AUTOMOTIVE ELECTRONICS SYST
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method for reducing the loss of the vehicle-mounted inverter of an electric vehicle and improving its current output capability, which mainly solves the high loss and low efficiency of the current electric vehicle inverter; the excessive heat dissipation load of the cooling system; IGBT and diode loads in the inverter are seriously asymmetrical, which greatly limits the current output capability of the inverter
[0012] The beneficial effect of the present invention is that: a new control strategy is introduced to solve the problems of many switching times, low efficiency and load asymmetry caused by the traditional modulation method, so as to reduce heat generation, improve inverter efficiency and reduce IGBT , the thermal asymmetry between the diodes improves the current output capability of the inverter

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
  • Method for reducing loss of electromobile vehicle-mounted inverter and improving current output capacity of electromobile vehicle-mounted inverter
  • Method for reducing loss of electromobile vehicle-mounted inverter and improving current output capacity of electromobile vehicle-mounted inverter
  • Method for reducing loss of electromobile vehicle-mounted inverter and improving current output capacity of electromobile vehicle-mounted inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The present invention can completely change the waveform of the voltage modulation wave by redistributing the zero vector, thereby changing the size of the loss. Since the action time of the six effective vectors has not changed, there is no change in the control of the vector control. Change the zero vector time from 000, 111 to 111, such as Figure 11 As shown, obtained as Figure 12 The modulation waveform of image 3 , it is obvious that in one cycle, the IGBT does not switch for one-third of the time, which is mainly concentrated in the positive half cycle of the current. It can be predicted that the switching loss of the high-end IGBT and the low-end diode can be significantly reduced. During the negative half cycle of the current, relative to image 3 , due to the overall upward shift of the voltage modulation wave (the turn-on time of each phase is longer than the original t7 / 2), the turn-on time of the low-end IGBT is reduced, the conduction loss is reduced,...

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 discloses a method for reducing loss of an electromobile vehicle-mounted inverter and improving current output capacity of the electromobile vehicle-mounted inverter, which is characterized in that a given voltage vector is formed by combining six basic voltage vectors with two zero current vectors so as to be equalized into a circular voltage rotary vector, and the time of the zero current vectors is completely 111, wherein 111 represents that three high-end tubes are all opened. In the invention, a novel control strategy is introduced to solve the problems of more switching times, low efficiency and asymmetric loads brought by a conventional modulation mode, so heating is reduced, the efficiency of the inverter is improved, heat asymmetry between an IGBT (Insulated Gate Bipolar Transistor) and a diode is reduced, and the current output capacity of the inverter is improved.

Description

technical field [0001] The invention relates to an electronic and electrical method for automobiles, in particular to an electrical and electronic method for an inverter onboard an electric vehicle. Background technique [0002] In electric / hybrid vehicles, the vehicle inverter is the main load of the high-voltage battery, which directly provides energy to the vehicle's drive motor, and its current is large, and its power is tens or even hundreds of kilowatts. So even if it is very efficient, it will generate a loss of several kilowatts. A big technology bottle of electric vehicles is its short cruising range, so it is very meaningful to be able to improve efficiency. In addition, the loss of several kilowatts will place high demands on the heat dissipation of the inverter. The power of the cooling water pump of the electric vehicle is small, and the high loss makes it difficult to bear. Ordinary SVPWM modulation mode, when the electric vehicle motor is dragging or braking...

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): H02M7/48
Inventor 孙儒文周伟波孙辉
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com