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A Sine Wave Dimmer Controlled by an Embedded System

An embedded system and dimmer technology, which is applied in the direction of light source, electric light source, lighting device, etc., can solve the problems of difficult dimmer products, high technical requirements, and inapplicability, so as to achieve convenient and automatic operation, overcome pollution to the power grid, The effect of cost reduction

Active Publication Date: 2017-01-04
南京云泰电气制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

IGBT dimmers have not been seen in the market, mainly because the human eye can detect tiny flickering and flaws in the light. Satisfactory dimmer products are difficult to manufacture and have high technical requirements. Among them, the driving circuit of IGBT is the key. Common IGBT drive modules on the market are not suitable for dimmers, and IGBT dimmers need to design their own dedicated IGBT drive modules (or circuits)

Method used

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  • A Sine Wave Dimmer Controlled by an Embedded System
  • A Sine Wave Dimmer Controlled by an Embedded System
  • A Sine Wave Dimmer Controlled by an Embedded System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as figure 1 as shown,

[0046] 1) The IGBT tube model is G60N100 medium power;

[0047] 2) The CPU of the embedded system is ARM9 (S3C2440); the heat dissipation surface of the IGBT tube is closely attached to the aluminum alloy casing, and the working temperature is emitted to the ambient atmosphere through the surface of the casing;

[0048] 3) The voltage at both ends of G-E of the IGBT tube controls the conduction and cut-off of the IGBT tube, +15V is on, and -15V is off;

[0049] 4) The main control program of the embedded system works in an infinite loop, and when the power is off, it is powered by the battery to ensure the continuation and update of the date and clock.

[0050] 5) The embedded system controls the CPU operation by the program and outputs the PWM signal, and controls the conduction and cut-off of the IGBT tube in the IGBT gate circuit through the IGBT drive circuit, so that the output voltage can be continuously adjusted within the range of ...

Embodiment 2

[0070] A sine wave dimmer controlled by an embedded system, including a man-machine dialogue interface, an embedded system, an IGBT drive circuit and an IGBT gate circuit, the embedded system inputs a PWM signal to the IGBT drive circuit, and is controlled by the IGBT drive circuit The conduction and cut-off of the IGBT gate circuit, the man-machine dialogue interface is used to set and display the operating parameters of the dimmer, and the embedded system is also used to operate the dimmer according to the man-machine dialogue interface. Input the corresponding PWM signal to the IGBT drive circuit and control the man-machine dialogue interface to display the operating parameters of the dimmer. The IGBT drive circuit will amplify the received PWM signal in two stages and output it to the IGBT gate circuit to control its opening. and closed, the IGBT gate circuit is used to superimpose the 220V sine wave alternating current and the carrier wave output by the IGBT drive circuit ...

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Abstract

The invention relates to a sine wave dimmer controlled by an embedded system. The sine wave dimmer comprises a man-machine conversation interface, the embedded system, an IGBT driving circuit and an IGBT gate circuit. The embedded system inputs a PWM signal to the IGBT driving circuit and controls the IGBT gate circuit through the IGBT driving circuit. The man-machine conversation interface is used for setting and displaying running parameters of the dimmer. The embedded system is further used for inputting the PWM signal to the IBGT driving circuit and controlling the man-machine conversation interface to display the running parameters of the dimmer at the same time. The IGBT driving circuit conducts two-stage amplification on the received PWM signal, then outputs the amplified PWM signal to the IGBT gate circuit and controls the IGBT gate circuit to be opened and closed. The IGBT gate circuit is used for superposing a sine wave alternating current and a carrier wave output by the IGBT driving circuit and then outputting the superposed current and wave to a loading circuit. The IGBT dimmer replaces an SCR dimmer, and the defects that an ordinary SCR dimmer is large in EMI, and a power grid is polluted are overcome.

Description

technical field [0001] The invention relates to a sine wave dimmer which can be controlled by an embedded system, and belongs to the technical field of electronic appliances. Background technique [0002] The dimmer realizes the dimming function of the lamp by changing the voltage (or current) of the 220V sine wave alternating current, usually using a silicon controlled rectifier (SCR, reverse blocking three-terminal thyristor referred to as thyristor) semiconductor power device, as attached figure 1 The main circuit schematic diagram of the thyristor dimmer is shown in the figure. [0003] Ui is the input voltage (mains 220V), Uo is the output voltage of the dimmer, and the external light bulb is connected. S1, S2 two thyristors or a bidirectional thyristor. The control circuit delays a phase angle to trigger the conduction of the thyristor S1 when the AC voltage crosses zero, until the next zero crossing is reversely cut off, and the next phase angle triggers the conduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 孙彤李忠
Owner 南京云泰电气制造有限公司