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A thyristor corner cutting control circuit and method

A control circuit and circuit technology, applied in the direction of electrical components, etc., can solve the problems of LED control chip temperature rise, system efficiency reduction, thyristor consumes more system energy, etc., to achieve the effect of reducing system loss and improving system efficiency

Active Publication Date: 2022-03-15
SHAANXI REACTOR MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, if the voltage used to drive the LED is high, the thyristor needs to consume more system energy to maintain its conduction. Therefore, it will cause a large energy loss to the entire LED system, reducing system efficiency and at the same time Make LED control chip temperature rise

Method used

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  • A thyristor corner cutting control circuit and method
  • A thyristor corner cutting control circuit and method
  • A thyristor corner cutting control circuit and method

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Embodiment Construction

[0050] Attached below Figure 1 to Figure 8(b) The technical scheme of the present disclosure is described in detail with the examples.

[0051] see figure 1 , the present disclosure provides a thyristor angle cutting control circuit, including: thyristor, LED constant current drive circuit, leakage current circuit, discharge circuit and leakage current control circuit; wherein,

[0052] One end of the LED constant current drive circuit is connected to the LED lamp group, and the other end is connected to the leakage current control circuit, which is used to collect the conduction current when the LED lamp group is turned on and control the conduction current to be constant;

[0053] One end of the leakage current circuit is connected to the leakage current control circuit, and the other end is connected to the thyristor through an AC power supply for providing leakage current to the thyristor;

[0054] One end of the leakage current control circuit is connected to the LED c...

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PUM

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Abstract

The present disclosure discloses a silicon controlled rectifier angle cutting control circuit, which includes an LED constant current drive circuit, used to control the conduction current of the LED lamp group to be constant; a leakage current circuit, used to provide leakage current to the silicon controlled silicon, and through Controlling the size of the leakage current to adjust the cutting angle of the thyristor; the discharge circuit is used to provide a maintenance current to keep the thyristor turned on; the leakage current control circuit is used to adjust the leakage current provided by the leakage current circuit. The size of the current controls the size of the cutting angle of the silicon controlled rectifier. The disclosure also discloses a method for controlling the cutting angle of the thyristor. In this disclosure, when the cutting angle of the thyristor is small, by adjusting the current value of the leakage current and increasing the cutting angle of the thyristor, the current value when the LED lamp group is turned on is close to the current value when the thyristor is turned on, and the system does not need It consumes more additional holding current, which can effectively reduce system loss and improve system efficiency.

Description

technical field [0001] The disclosure belongs to the technical field of thyristor dimming, and in particular relates to a thyristor angle cutting control circuit and method. Background technique [0002] Thyristor dimming technology controls the brightness of light through electrical signals. It is an important LED power supply technology, widely used in various electronic equipment and electronic products, and plays an important role in people's lives. [0003] In the prior art, the LED control circuit mostly adopts the combination of the thyristor dimmer and the constant current control circuit. Among them, the dimming scheme of the thyristor dimmer is: The SCR provides a holding current to keep it turned on. In this case, if the voltage used to drive the LED is high, the thyristor needs to consume more system energy to maintain its conduction. Therefore, it will cause a large energy loss to the entire LED system, reducing system efficiency and at the same time Make the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/10H05B45/30
Inventor 熊平杨世红
Owner SHAANXI REACTOR MICROELECTRONICS