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High power factor flicker-free linear control method compatible with thyristor dimmer and control device used

A high power factor, linear control technology, applied in the field of control, can solve problems such as low efficiency and stroboscopic output

Active Publication Date: 2021-07-06
杭州欧佩捷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The linear thyristor dimming scheme is widely favored due to its low cost and simplicity, but the current linear thyristor dimming has the compatibility of thyristor dimmers, and the output has strobe, and the efficiency is low under high power factor requirements. , and increase the electrolytic capacitor of the energy storage element to solve the stroboscopic problem, how to ensure that the electrolytic capacitor can be charged to the corresponding energy storage voltage, etc., so it is necessary to further improve the existing technology

Method used

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  • High power factor flicker-free linear control method compatible with thyristor dimmer and control device used
  • High power factor flicker-free linear control method compatible with thyristor dimmer and control device used
  • High power factor flicker-free linear control method compatible with thyristor dimmer and control device used

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Experimental program
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Effect test

Embodiment 1

[0078] Embodiment 1. A high power factor flicker-free linear control device compatible with thyristor dimmers, such as figure 2 Shown:

[0079] Including functional module M1, Q1 power MOSFET, resistors R1 and R2 connected in series to form an external ground voltage divider network; the VREC output terminal of the full-wave rectifier bridge is respectively connected to the external ground voltage divider network, functional module M1 and the anode of the isolation diode D1; Q1 The source of the power MOSFET is connected to the positive electrode of the electrolytic capacitor Cd of the energy storage element and the LED load current; the gate potential of the Q1 power MOSFET is respectively connected to the resistor Rc and the functional module M1 (that is, the gate potential of the Q1 power MOSFET is controlled by Resistor Rc and functional module M1 control); the drain of Q1 power MOSFET is connected with the negative pole of isolation diode D1.

[0080] The output termina...

Embodiment 2

[0118] Embodiment 2. A high power factor flicker-free linear control device compatible with thyristor dimmers, such as figure 1 Shown:

[0119] The difference between this embodiment 2 and embodiment 1 is only the following content:

[0120] The negative electrode of the electrolytic capacitor Cd of the energy storage element is connected to the functional module M1 and the resistor R3 respectively, and the negative electrode of the full-wave rectifier bridge, the ground of the functional module M1, and the resistor R3 are respectively connected; that is, the negative electrode of the electrolytic capacitor Cd of the energy storage element is connected to the ground through the resistor R3, like figure 1 .

[0121] Specifically, the control module in the functional module M1 is respectively connected to the negative electrode of the electrolytic capacitor Cd of the energy storage element and the resistor R3 ( image 3 A).

[0122] The voltage on the resistor R3 reflects th...

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Abstract

The invention discloses a high power factor flicker-free linear control method compatible with a thyristor dimmer and a control device used therein. The control device includes a functional module M1, a Q1 power MOSFET, and resistors R1 and R2 connected in series to form an external ground splitter. voltage network; the functional module M1 controls its internal grounded voltage-controlled current source Is and the internal grounded voltage-controlled current source Io according to the DIM signal waveform; the gate of the Q1 power MOSFET is controlled by the resistor Rc and the functional module M1; the internal of the functional module M1 The voltage at both ends of the grounded voltage-controlled current source Io is internally fed back to the functional module M1 through the internal voltage divider network to output the FB signal voltage. The invention can overcome the three problems of compatibility of silicon controlled silicon dimmers, low efficiency under high power factor requirements, and stroboscopic output existing in the existing linear silicon controlled silicon dimming scheme.

Description

technical field [0001] The invention belongs to the field of control, and in particular relates to a linear control method with high power factor and flicker-free which is compatible with a thyristor dimmer. Background technique [0002] Due to the lighting application standards of various countries, such as Energy Star in the United States, there is a power factor PF requirement for lighting applications, requiring PF>0.7 or PF>0.9; The required index for testing under rated input AC voltage conditions; that is to say, the lighting power supply compatible with the thyristor dimmer needs to have the working performance in two applications, that is: in the application without the thyristor dimmer, showing High power factor, high efficiency and no stroboscopic characteristics; and in the application of thyristor dimmers, it shows good compatibility, high efficiency and no stroboscopic characteristics. [0003] The thyristor dimming system solution is composed of a thyri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/30H05B45/355H05B45/395H05B44/00
CPCH05B45/00Y02B20/30
Inventor 翁大丰孙建中
Owner 杭州欧佩捷科技有限公司