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A kind of AC phase-cut digital dimming control device and control method

A dimming control and phase-cutting dimming technology, which is applied in the computer field, can solve problems such as phase-cutting calculation errors, inconvenient operation, and affecting dimming accuracy, so as to achieve precise dimming and improve accuracy

Active Publication Date: 2022-07-08
深圳市福乐沃光电科技有限公司
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  • Claims
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Problems solved by technology

However, the current dimming methods all have the problem of inconvenient operation. There is no self-adaptation to the frequency of AC power. The fluctuation of the grid frequency may lead to phase-cutting calculation errors, which will affect the dimming accuracy and lead to the failure of phase-cutting dimming.

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  • A kind of AC phase-cut digital dimming control device and control method
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  • A kind of AC phase-cut digital dimming control device and control method

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Embodiment Construction

[0050] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

[0051] In one embodiment, the present invention provides an AC phase-cut digital dimming control device, including a zero-crossing detection circuit 100 , an MCU main control circuit 200 , a driving circuit 300 and a phase-cut dimming circuit 400 .

[0052] Wherein, the zero-crossing detection circuit 100 is used to detect the zero-crossing signal of the alternating current. Specifically, the zero-crossing signal is the signal at the time when the amplitude of the AC signal is zero, that is, the signal at the moment when the amplitude of the AC signal changes from posi...

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Abstract

The invention relates to an AC phase-cut digital dimming control device and a control method. The device comprises a zero-crossing detection circuit, an MCU main control circuit, a drive circuit and a phase-cut dimming circuit, and the MCU main control circuit is used for receiving The zero-crossing signal detected by the zero-crossing detection circuit, and output a zero-crossing compensation control signal according to the zero-crossing signal; the driving circuit is used to receive the zero-crossing compensation control signal output by the MCU main control circuit, and respond to the zero-crossing compensation control signal. The compensation control signal performs level amplitude conversion and outputs a MOS / IGBT drive level signal; the phase-cut dimming circuit is used for receiving the MOS / IGBT drive level signal output by the drive circuit, and according to the MOS / IGBT drive level signal The drive level signal outputs a phase-cut control signal to the lamp to be dimmed, so as to perform phase-cut dimming of the lamp to be dimmed. The present invention can realize precise dimming by outputting a phase-cut control signal to the lamp to be dimmed in the next cycle, so as to perform phase-cut dimming of the lamp to be dimmed, thereby improving the accuracy of phase-cut dimming.

Description

technical field [0001] The present invention relates to the technical field of computers, in particular to an AC phase-cut digital dimming control device and a control method. Background technique [0002] LED dimming is a method of changing the luminous flux of the light source in the lighting device and adjusting the illuminance level. A dimmer is usually used, and the purpose of the dimmer is to adjust the different brightness of the light. Different intensities of light output produced by lights of average power are induced by decreasing or increasing the RMS voltage. While variable voltage devices can be used for various purposes, this modulation is intended to control lighting. [0003] At present, when dimming the LED lights, there are mainly two ways. One is the way of using the DIP switch, and the 50Hz and 60Hz AC power is configured separately on the hardware. The other is the separate configuration of 50Hz AC and 60Hz AC through software programming. However, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/30H05B45/31H05B45/10
CPCH05B45/30H05B45/31H05B45/10Y02B20/40
Inventor 丁平周润根刘芳荣
Owner 深圳市福乐沃光电科技有限公司
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