Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

High-voltage and large-power PWM light modulation LED driving power supply without electrolytic capacitor

A technology of LED driving and electrolytic capacitors, applied in the field of lighting, can solve the problems of restricting the service life of LED lighting systems, limiting the service life of LED driving power, etc., to achieve the effect of improving the service life and improving reliability.

Active Publication Date: 2016-02-24
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the service life of the electrolytic capacitor limits the life of the LED drive power supply, which further restricts the service life of the entire LED lighting 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
  • High-voltage and large-power PWM light modulation LED driving power supply without electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] see figure 1 As shown, the electrolytic capacitor-free high-voltage high-power PWM dimming LED drive power supply of the present invention includes a rectification circuit 1, and the rectification circuit 1 is connected to the input terminal of the power supply. The LED driving power also includes a current-type multi-level DC-DC circuit and a control circuit 4 . The rectification circuit 1 is connected with the current-mode multi-level DC-DC circuit. The current-type multi-level DC-DC circuit is connected with the LED light source 5 . The current-type multi-level DC-DC circuit is connected with the control circuit 4 .

[0014] The current-mode multi-level DC-DC circuit is a current-mode five-level DC-DC circuit 2 . The current-type five-level DC-DC circuit 2 includes a first diode D1, a second diode D2, a third diode D3, a fourth di...

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 high-voltage and large-power PWM light modulation LED driving power supply without an electrolytic capacitor. The LED driving power supply comprises a rectification circuit (1). The rectification circuit (1) is connected to the input end of the power supply. The LED driving power supply also comprises a current type multi-level DC-DC circuit and a control circuit. The rectification circuit (1) is connected to the current type multi-level DC-DC circuit. The current type multi-level DC-DC circuit is connected to an LED light source (5), and is also connected to the control circuit (4). An electrolytic capacitor is not needed by the LED driving power supply, so the service life of the driving power supply is prolonged and the reliability of a whole LED illumination system is improved.

Description

technical field [0001] The invention relates to the technical field of lighting, more specifically to a high-voltage high-power PWM dimming LED drive power supply without an electrolytic capacitor. Background technique [0002] At present, most of the LED driving power supply is AC power supply, so circuit conversion is required, that is, converting the AC power into the required DC power, and generating a controllable DC constant current source to drive the LED to work. In the conversion circuit, an energy storage element is needed to maintain the power balance between input and output. Usually, the first choice for this energy storage element is an electrolytic capacitor. [0003] The lifespan of conventional electrolytic capacitors is only about 10,000 hours when the ambient temperature is 50°C, and its lifespan will be doubled for every 10°C increase in operating temperature. However, the life of the LED itself can usually reach 100,000 hours, and the life of the electr...

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): H05B37/02
CPCY02B20/40
Inventor 鲍建宇鲍卫兵张伟剑
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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