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

Voltage space vector modulation method

A technology of voltage space vector and modulation method, which is applied in the direction of vector control system, motor generator control, control of electromechanical brake, etc., can solve the problem of large amount of calculation, etc., and achieve the effect that the algorithm form is simple and easy to realize by computer

Inactive Publication Date: 2011-08-17
ZHUZHOU CSR TIMES ELECTRIC CO LTD
View PDF3 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the traditional SVPWM method needs to perform complex sine functions, resulting in a large amount of calculation, its complex algorithm has a non-negligible impact on high-precision real-time control, so many people have conducted in-depth research on the SVPWM algorithm to simplify the SVPWM. Realize and calculate, improve the response speed and processing accuracy of the whole system

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
  • Voltage space vector modulation method
  • Voltage space vector modulation method
  • Voltage space vector modulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] As a specific embodiment of a voltage space vector modulation method of the present invention, the DC voltage of the voltage source inverter is set as V dc , the reference voltage vector in the control system:

[0052] V → Ref = V m e jθ - - - ( 8 ...

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 voltage space vector modulation method, which comprises the following steps of: 101, calculating unit values v<o>d and v<o>q of a reference voltage vector, wherein v<o>d is calculated by multiplying V<o>m by cos(Theta), v<o>q is calculated by multiplying V<o>m by sin(Theta), V<o>m represents normalized amplitude and Theta represents an angle; 102, calculating d and q components Vd and Vq of the reference voltage vector according to the unit values of the reference voltage vector; 103, judging a sector k with the reference voltage vector according to the v<o>d and the v<o>q; and 108, calculating a pulse width modulation (PWM) comparison value by using a formula selected by a corresponding k value according to the Vd and the Vq. The technical scheme provided by the invention is widely applied to an industrial AC drive system, related irrational numbers are calculated for fewer times, time to live values, required by each phase, of a PWM timer can be calculated only by simple four arithmetic operations, and an algorithm is extremely simple and convenient to realize by a computer.

Description

technical field [0001] The invention relates to a Pulse Width Modulation (PWM, Pulse Width Modulation) method, in particular to a general method that is convenient for a computer to implement pulse width modulation for voltage space vectors. Background technique [0002] With the development of computer control technology and semiconductor electronic technology, power electronic technology based on microprocessors and controllable switching devices has been widely used in human production and life. Especially in the industrial field, traditional phase-controlled rectifiers are gradually giving way to PWM rectifiers with low harmonics and high power factor, and digital high-performance AC drive systems have completely replaced DC drive systems. mainstream. [0003] Pulse width modulation technology is one of the basic and key technologies of modern AC drives and PWM rectifiers. Among various pulse width modulation technologies, SVPWM technology has many advantages such as hi...

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
IPC IPC(8): H02P21/14
Inventor 丁荣军李江红许为
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD