Unlock instant, AI-driven research and patent intelligence for your innovation.

Control device and control method for current source inverter

A technology of current-mode inverter and control device, which is applied in output power conversion device, conversion of AC power input to DC power output, electrical components, etc., can solve problems such as frequent changes in operating conditions, and achieve high performance.

Active Publication Date: 2018-09-28
HUNAN VICRUNS ELECTRIC TECH +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Despite the above advantages, during the operation of electric vehicles, the operating conditions change frequently

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
  • Control device and control method for current source inverter
  • Control device and control method for current source inverter
  • Control device and control method for current source inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0073] According to another embodiment of the present invention, the control step may include:

[0074] 1. Calculate the d-q axis reference current

[0075] The inverter side takes the three-phase AC voltage u a , u b , u c Transformed by Clark to d-q axis voltage u d , u q . Compare the motor speed ω with the given speed The difference between d-q axis voltage u d , u q Together as the input of the control strategy module. According to the motor speed ω and the given speed The difference between d-q axis voltage u d , u q, the control strategy module calculates and outputs the d-q axis reference current and

[0076] 2. Set a given minimum modulation factor m min

[0077] According to the relationship between the inverter modulation factor m and the output current THD, select an appropriate inverter modulation factor m 1 , if the inverter modulation factor m is less than the inverter modulation factor m 1 , the output current THD increases sharply, th...

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 a control device and a control method for a current source inverter. The control device comprises a first calculation module, a second calculation module, a modulation factor judging module and a selection module, wherein the first calculation module is used for receiving a plurality of first reference currents and generating a first calculation result through a first algorithm; the second calculation module is used for receiving the plurality of first reference currents and generating a second calculation result through a second algorithm; the modulation factor judgingmodule is used for comparing a reference modulation factor with a given minimum modulation factor, and generating a comparison result; and the selection module is used for selectively outputting the first calculation result or the second calculation result according to the comparison result for a generated triggering pulse to control on-off actions of the inverter. The control device and the control method for the current source inverter, provided by the invention, can enable the inverter to have relatively higher performance.

Description

technical field [0001] The present invention relates to a control device and method for a current source inverter, more specifically, the present invention relates to a closed-loop control device and method for a novel current source inverter driven by an electric vehicle. Background technique [0002] With the advancement of global electric vehicles and electric drive technology, electric vehicles have increasingly stringent requirements for high performance, high density and high reliability of the drive system, which has brought great challenges to inverter design and control. In modern electric vehicles (EV), the drive system is the heart of the electric vehicle, which directly determines the power performance and driving experience of the electric vehicle, and the inverter is a key component. The quality of the output performance of the inverter directly determines the performance, life and power consumption of the car drive motor. [0003] At present, pure electric ve...

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): H02M7/537
Inventor 刘平尹书虎唐心柳罗德荣黄守道朱伟进王涛
Owner HUNAN VICRUNS ELECTRIC TECH