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Phase cut power supply and color modulation method thereof

A power supply and circuit technology, applied in electrical components, regulating electrical variables, control/regulating systems, etc., can solve problems such as increasing cost, reducing power conversion efficiency, stroboscopic phenomenon, etc., to reduce losses, simplify control circuits, and reduce costs. Effect

Pending Publication Date: 2022-08-05
TIANCHANG FUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, how to achieve "tunable color" is another requirement for thyristor LED drivers to meet the LED technology in meeting the demand for "dimmable light". The existing thyristor color scheme only supports three color temperature adjustments, that is, warm, There are three color temperatures of white and warm white, but in some occasions more types of color temperatures are required, which requires the introduction of a PWM controller at the output end of the LED drive power supply to adjust the light intensity of different channels to achieve light intensity adjustment, but PWM The introduction of the controller will inevitably reduce the conversion efficiency of the power supply, and will introduce stroboscopic phenomenon, so it is necessary to further add a ripple chip to further increase the cost

Method used

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  • Phase cut power supply and color modulation method thereof
  • Phase cut power supply and color modulation method thereof
  • Phase cut power supply and color modulation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Please refer to figure 1 ,

[0034] A phase-cut power supply includes a filter network for filtering common mode interference signals and differential mode interference signals input into the power supply; a rectification and decoupling circuit for converting alternating current into direct current; an absorption and power supply circuit for The control chip provides energy and resets the transformer; the control chip circuit is used to control the working mode of the switch tube in the circuit to cope with different load conditions; the transformer circuit is used to isolate the primary side and the secondary side, and realize the energy from the primary side to the secondary side energy The color temperature adjustment circuit is used to change the light intensity of LED circuits with different color temperatures to achieve the purpose of color temperature adjustment.

[0035] Please refer to figure 2 ,

[0036] The filter network includes a capacitor CX1, a film ...

no. 2 example

[0053] Please refer to image 3 , except for the absorption and power supply circuits, other circuits are the same as the first embodiment.

[0054] The absorption and power supply circuit includes a diode D2, an NMOS transistor Q2, a capacitor C3, a capacitor C4, a capacitor C5, a diode D3, and an inverter U2. Its function is, on the one hand, it absorbs the energy stored in the leakage inductance of the transformer, and controls the output voltage through the capacitors C3, C4, and C5.

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Abstract

The invention discloses a phase-cut power supply and a color modulation method thereof, and the power supply comprises a filter network, a rectification decoupling circuit, an absorption and power supply circuit, a control chip circuit, a transformer circuit, and a color temperature adjustment circuit. The LED driving power supply is used for solving the problems of serious interference, extra audio effect, light flicker, high multi-color-temperature color modulation cost and the like of a silicon-controlled LED driving power supply in the prior art, and realizes good filtering effect, low audio noise, no flicker and multi-color-temperature adjustment.

Description

technical field [0001] The invention relates to the technical field of switching power supplies, in particular to a phase-cut power supply and a color-adjusting method thereof. Background technique [0002] With the development of LED technology, LED technology is also widely used in lighting, and "dimmable" is an important advantage of LED light sources compared with traditional light sources. Toning can be achieved on the basis of traditional light sources. The thyristor dimming is currently the way that traditional light sources generally achieve "dimmable", and occupies a large part of the dimming market. If you want to use LEDs to replace traditional light sources, you need LED drive power and thyristor compatible. . [0003] Compared with the traditional light source working on AC, the LED light source needs a stable and constant DC drive power supply, which leads to a series of problems that the LED drive power supply is compatible with the thyristor. First, the thy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/382H05B45/59H05B45/20H05B45/10H02M1/12H02M3/335
CPCH05B45/382H05B45/50H05B45/20H05B45/10H02M1/126H02M3/33523Y02B20/30
Inventor 金承翠林森茂马久金邹军石明明
Owner TIANCHANG FUAN ELECTRONICS CO LTD