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

Seven-segment SVPWM modulation method and system

A modulation method and modulation system technology, which are applied to output power conversion devices, electrical components, and the conversion of AC power input to DC power output, etc., can solve the problems of complex and cumbersome seven-segment modulation operations.

Active Publication Date: 2017-08-18
HEBEI UNIVERSITY
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] One of the purposes of the present invention is to provide a seven-segment SVPWM modulation method, which uses the polar coordinates ρ, θ to control the SVPWM modulation process, which can solve the complex and cumbersome problems of the existing seven-segment modulation operation

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
  • Seven-segment SVPWM modulation method and system
  • Seven-segment SVPWM modulation method and system
  • Seven-segment SVPWM modulation method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] The invention provides a method for realizing seven-segment SVPWM modulation (including a modulation method and a modulation system). The invention is completed on the basis of the basic principle of SVPWM modulation and the modulation waveform of the traditional seven-segment SVPWM. Specifically, the present invention provides a calculation method for generating modulated waves by SVPWM and its SVPWM modulation hardware circuit structure, which can be transplanted into a SVPWM software modulation scheme according to the hardware structure and design method.

[0075] The SVPWM modulation system (also called a modulation circuit) provided by the present invention can complete the SVPWM modulation only by inputting a few discrete and limited sinusoidal signal sampling point values. The process is:

[0076] In the six sectors of the basic vector space, there are equally spaced sampling points M=6n, which is equivalent to the number of sampling points in a circle of 360°; ...

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 seven-segment SVPWM modulation method and system, is based on the SVPWM basic modulation principle and is accomplished based on traditional seven-segment SVPWM modulation waveform. According to the method, a control signal is inputted in a pole coordinate mode, namely input amplitude rho and angle theta information control, the amplitude rho is a reference voltage vector Vref in a control process, and the theta is a rotation angle omegat of the reference voltage vector Vref. The method is advantaged in that calculation can be simplified after sampling normalization, SVPWM modulation is made to be quite simple, an SVPWM modulation circuit has a simple structure, and SVPWM modulation can be accomplished only through inputting several limited trigonometric function values during modulation; according to hardware design of the circuit structure, the method can be transplanted to software modulation.

Description

technical field [0001] The invention relates to the technical field of PWM modulation, in particular to a seven-segment SVPWM modulation method and modulation system. Background technique [0002] Three-phase inverter is the process of converting direct current into three-phase alternating current through an inverter circuit. Three-phase inverter is used in the development of new energy, power active filters, reactive power generators, photovoltaics, wind energy, energy storage batteries and other equipment is widely used. Three-phase inverters are usually used as figure 1 The shown inverter bridge circuit (or inverter circuit) has six power switching devices T1~T6 in the inverter bridge circuit, C 1 ~C 6 They are the driving signals of six power switching devices, u, v, w are the three-phase phase voltages output by the inverter bridge circuit, U dc is the DC voltage of the inverter bridge circuit. The inverter bridge circuit is controlled in an orderly manner through ...

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): H02M7/5395H02M7/5387
CPCH02M7/5387H02M7/5395H02M1/0003Y02B70/10
Inventor 陆原张军伟马东赵江峰刘泰廷
Owner HEBEI UNIVERSITY