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, AC frequency not self-adaptive, and affecting dimming accuracy.

Active Publication Date: 2021-04-13
深圳市福乐沃光电科技有限公司
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  • Summary
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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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  • AC phase-cut digital dimming control device and control method
  • AC phase-cut digital dimming control device and control method
  • AC phase-cut digital dimming control device and control method

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Embodiment Construction

[0050] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

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

[0052] Wherein, the zero-crossing detection circuit 100 is used for detecting a zero-crossing signal of 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 po...

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Abstract

The invention relates to an AC phase-cut digital dimming control device and control method. The device comprises a zero-crossing detection circuit, an MCU main control circuit, a drive circuit, and a phase-cut dimming circuit, wherein the MCU main control circuit is used for receiving a zero-crossing signal detected by the zero-crossing detection circuit, and outputting a zero-crossing compensation control signal according to the zero-crossing signal, the driving circuit is used for receiving the zero-crossing compensation control signal output by the MCU main control circuit, performing level amplitude conversion on the zero-crossing compensation control signal and outputting an MOS/IGBT driving level signal, and the phase-cut dimming circuit is used for receiving the MOS/IGBT driving level signal output by the driving circuit and outputting a phase-cut control signal to a lamp to be dimmed according to the MOS/IGBT driving level signal so as to perform phase-cut dimming on the lamp to be dimmed. According to the invention, the phase-cut control signal is output to the lamp to be dimmed in the next period so as to carry out phase-cut dimming on the lamp to be dimmed, so that accurate dimming can be realized, and the phase-cut dimming accuracy is further improved.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to an AC phase-cutting digital dimming control device and a control method. Background technique [0002] LED dimming is a method to change the luminous flux of the light source in the lighting device and adjust the illuminance level. Usually dimmers are used, and the purpose of dimmers is to adjust the different brightness of lights. Light output of different intensities produced by lamps of average power by reducing or increasing the RMS voltage. While variable voltage devices can be used for a variety of purposes, this regulation is aimed at controlling lighting. [0003] At present, when dimming LED lamps, there are mainly two methods, one is the method of using a code switch, and the 50Hz and 60Hz alternating currents are respectively configured on the hardware. The other is the separate configuration of 50Hz AC and 60Hz AC through software programming. However, the curre...

Claims

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Application Information

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Patent Type & Authority Applications(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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