Supercharge Your Innovation With Domain-Expert AI Agents!

Single-phase output frequency converter and control method therefor

A single-phase output, frequency converter technology, used in control systems, control generators, vector control systems, etc.

Active Publication Date: 2015-12-09
深圳市研智电气技术有限公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this space vector control technology needs at least two phase currents to control the motor, while the single-phase asynchronous motor has only one phase current, so it is still impossible to apply the space vector control technology to the single-phase asynchronous motor

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
  • Single-phase output frequency converter and control method therefor
  • Single-phase output frequency converter and control method therefor
  • Single-phase output frequency converter and control method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034]The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] The invention proposes a single-phase output frequency converter.

[0036] Such as figure 1 As shown, in an embodiment of the present invention, the single-phase output frequency converter includes a rectification module 100 for converting alternating current into corresponding direct current and for converting the direct current into variable-frequency alternating current and providing it to the single-phase asynchronous motor The inverter module 200, the single-phase output frequency converter also includes a sampling module 300, a phase shifting module 400 and a control processing module 500, wherein the sampling module 300 is used to output to the inverter...

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 single-phase output frequency converter and control method therefor. The single-phase output frequency converter comprises a rectifying module for converting alternating current into corresponding direct current, an inverting module for converting the direct current into variable frequency alternating current and providing the variable frequency alternating current to a single-phase asynchronous motor, a sampling module, a phase shifting module and a control processing module, wherein the sampling module is used for sampling the current of the variable frequency alternating current output to the single-phase asynchronous motor according to a preset sampling sample, and outputting first phase current; the phase shifting module is used for shifting phase of the first phase current and generating second phase current; and the control module is used for obtaining third phase current according to a preset current computational formula, the first phase current and the second phase current, and controlling the space vector of the inverting module according to the first phase current, the second phase current and the third phase current. The problem of controlling the single-phase asynchronous motor through the space vector control technology is solved by the single-phase output frequency converter and the control method therefor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a single-phase output frequency converter and a control method thereof. Background technique [0002] Single-phase asynchronous motors are more and more widely used in household appliances such as refrigerators, washing machines, and air conditioners due to their simple structure, low cost, and convenient use and maintenance. Existing single-phase asynchronous motors generally use frequency converters to regulate speed through constant voltage-frequency ratio control. However, the single-phase asynchronous motor requires the inverter frequency to be above 20 Hz to establish the direction of the magnetic field. Therefore, when working at a low frequency (below 20 Hz), especially when it is below 7 Hz, if the constant voltage frequency ratio control method is adopted, it will be As a result, the reactive current of the single-phase asynchronous motor is large, and the rotational to...

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): H02P27/06H02P25/04H02P21/00
Inventor 宋希华
Owner 深圳市研智电气技术有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com