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LED-based driving power supply for sunshine-imitating light source

A technology of LED light source and driving power supply, applied in the field of power supply, can solve the problems of low conversion efficiency and low stability, and achieve the effects of high conversion efficiency, simple structure and convenient wiring.

Inactive Publication Date: 2014-05-28
FEMTO TECH XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a common power supply supplies power to a large number of LEDs, the stability will be low and the conversion efficiency will be low.

Method used

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  • LED-based driving power supply for sunshine-imitating light source

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Embodiment Construction

[0020] Such as figure 1 As shown, the present invention includes an anti-surge circuit 2 for preventing surge current from invading when the grid voltage fluctuates, a filter circuit-3 for filtering out interference signals in the grid voltage, and a transformer connected to the filter circuit-3 4. A rectifier circuit for converting the alternating current output by the transformer 4 into a direct current. 5. A filter circuit for filtering out the pulsating components in the direct current output by the rectifier circuit 5. 6. Under the control of the controller 13, adopt the boost flyback conversion method to The PFC converter 7 for correcting and compensating the power factor of the circuit, the DC / DC converter 8 for converting the output voltage of the PFC converter 7 so that the driven LED light source 9 obtains the required voltage, and the driven LED light source 9 are connected A voltage sampling circuit 10, a V / I conversion circuit 11 that converts the voltage signal o...

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Abstract

The invention discloses an LED-based driving power supply for a sunshine-imitating light source. The LED-based driving power supply comprises an anti-surge circuit, a filter circuit I, a transformer connected with the filter circuit I, a rectification circuit for converting alternating current outputted by the transformer into direct current, a filter circuit II for eliminating pulsation components in the direct current outputted by the rectification circuit, a PFC converter for correcting and compensating circuit power factors under the control of a controller, a DC / DC converter for converting voltage outputted by the PFC converter to enable a driven LED light source to obtain required voltage, a voltage sampling circuit connected with the driven LED light source, a V / I converting circuit for converting voltage signals outputted by the voltage sampling circuit into current signals, and a protection circuit connected between the controller and the PFC converter. The LED-based driving power supply is simple in structure and convenient in wiring, and can supply power for a lot of LEDs effectively and continuously.

Description

technical field [0001] The invention relates to a power supply, in particular to a driving power supply for an LED-based sunlight imitation light source. Background technique [0002] The power supply is the power heart of electronic equipment, and its performance directly affects the safety and reliability of the entire system. With the rapid development of power electronic technology, power electronic equipment is increasingly closely related to people's work and life. Equipment cannot do without a reliable power source. [0003] The individual light source in the sunlight imitation light source is composed of a large number of LED lights. LED lights are current devices and need a power supply that can provide stable current to power them. When a common power supply supplies power to a large number of LEDs, the stability is not high and the conversion efficiency is low. Contents of the invention [0004] The technical problem to be solved by the present invention is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 张国琦
Owner FEMTO TECH XIAN
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