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

Variable switching frequency pulse width modulation implementation method based on FPGA

A technology of switching frequency and implementation method, applied in control systems, AC motor control, electrical components, etc., can solve problems such as large switching loss, and achieve the effect of extending service life, reducing switching loss, and meeting real-time requirements.

Inactive Publication Date: 2020-03-13
XIAN XIANGXUN TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the operation of the existing motor, no matter whether the motor is running at a low speed or at a high speed, a relatively high switching frequency is used to realize the control of the motor, which makes the switching loss relatively large

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
  • Variable switching frequency pulse width modulation implementation method based on FPGA
  • Variable switching frequency pulse width modulation implementation method based on FPGA
  • Variable switching frequency pulse width modulation implementation method based on FPGA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] The implementation method of variable switching frequency pulse width modulation based on FPGA is to use FPGA to generate three-phase modulation wave according to the input modulation ratio, basic frequency and other data. At the same time, linearize the basic frequency to obtain the carrier switching frequency, and then generate a triangular carrier. The m...

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 variable switching frequency pulse width modulation implementation method based on FPGA so that switching frequency is dynamically changed according to different modulation wave frequencies, optimal switching frequency selection is realized, switching loss is reduced, and the service life of equipment is prolonged. The method mainly comprises the following steps that: 1, an FPGA receives a modulation ratio, a basic frequency and positive and negative frequencies sent by a DSP; 2, the FPGA processes the received modulation ratio, the basic frequency and the positive andnegative frequencies to obtain a gate pole trigger pulse; and 3, a gate trigger pulse is outputted in real time to realize on-off control of the power switching device.

Description

technical field [0001] The invention relates to an FPGA-based realization method of variable switching frequency pulse width modulation. Background technique [0002] With the continuous advancement of science and technology in aviation, aerospace, rail transportation and other fields, pulse width modulation technology is playing an increasingly vital role in the automation process. Most motor control systems are control systems based on DSP+FPGA architecture. The control system uses DSP and FPGA as the core processing devices. Aiming at specific problems such as real-time control and high precision in motor control, it is planned to implement motor control algorithms on DSP. , realize pulse width modulation and pulse output function on FPGA. The motor control system based on the DSP+FPGA architecture combines the advantages of DSP floating-point number processing with the advantages of FPGA high-speed data processing capabilities and parallel execution functions, which can...

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): H02P27/08
CPCH02P27/085
Inventor 宋宇庭张鹏飞谢华伟李磊张成田晓丹李小峰
Owner XIAN XIANGXUN TECH