Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A discharge circuit, a discharge current control method, and an LED control circuit

A technology for discharging current and discharging circuit, which is applied in the field of discharging circuit, discharging current control method and LED control circuit, can solve the problems of low efficiency, high power consumption, poor conduction stability of thyristor, etc. System efficiency, reducing bleeder current and improving system reliability

Active Publication Date: 2018-04-17
JOULWATT TECH ZHANGJIAGANG INC LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a discharge circuit, a discharge current control method and an LED control circuit to solve the poor stability, low efficiency and power failure of the thyristor in the prior art. costly technical issues

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
  • A discharge circuit, a discharge current control method, and an LED control circuit
  • A discharge circuit, a discharge current control method, and an LED control circuit
  • A discharge circuit, a discharge current control method, and an LED control circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.

[0041] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0042] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...

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 discharge circuit, a discharge current control method and an LED control circuit. The scheme of the invention can be applied to a switch drive scheme. The threshold voltage is a zero-crossing value. When the input voltage crosses zero, a leakage Discharge the current so that the input current is greater than the holding current of the thyristor. According to the waveform characteristics of the front and rear half cycles of the sine wave and the size of the input current of the drive circuit, control whether the discharge current adjustment circuit is enabled or not. The present invention ensures the dimming effect. , reduces the discharge current, improves system efficiency and system reliability, and at the same time helps to increase the maximum conduction angle of the TRIAC, making it easier to meet the requirements of the maximum output current.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a discharge circuit, a discharge current control method and an LED control circuit. Background technique [0002] Because LED lamps are more energy-saving and environmentally friendly than traditional fluorescent lamps and incandescent lamps, LED lamps are slowly replacing existing fluorescent lamps and incandescent lamps. In incandescent lamps with thyristor dimmers, it is also desirable to use LED lamps to replace them, so LEDs must be compatible with thyristor dimmers. However, in the application of LED lamps to replace incandescent lamps, due to the large voltage change rate (dv / dt) at the output terminal voltage when the thyristor is turned on, it will cause a large wave at the input terminal. inrush current. This surge current has a large oscillation amplitude and short duration, which can easily cause the thyristor to be turned off by mistake, affect the stable...

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 Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/37H05B45/3575
Inventor 刘国强白浪张军明黄必亮任远程周逊伟
Owner JOULWATT TECH ZHANGJIAGANG INC LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com