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Delay conduction circuit of silicon controlled rectifier and delay conduction method thereof

A technology that delays conduction and controls circuits. It is used in electric light sources, electrical components, sustainable buildings, etc. It can solve the problem of unstable conduction angle of triac circuits, avoid excessive conduction current, and improve stability. sex, life expectancy

Inactive Publication Date: 2017-08-15
ULTIMATE IOT (SHANGHAI) TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a thyristor delay turn-on circuit and its turn-on method to solve the problem of unstable conduction angle of the existing bidirectional thyristor circuit

Method used

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  • Delay conduction circuit of silicon controlled rectifier and delay conduction method thereof
  • Delay conduction circuit of silicon controlled rectifier and delay conduction method thereof
  • Delay conduction circuit of silicon controlled rectifier and delay conduction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An incandescent lamp dimming switch with a silicon controlled rectifier delay conduction circuit, including a power supply circuit for providing a regulated power supply to the circuit; a device for receiving a dimming signal from an MCU control circuit and adjusting the average current flowing through the incandescent lamp Bidirectional thyristor circuit; used for MCU control circuit to detect the zero-crossing point of alternating current to control the zero-crossing detection circuit of bidirectional thyristor circuit; used to detect the zero-crossing point of alternating current through the zero-crossing detection circuit to control the conduction of bidirectional thyristor circuit The MCU control circuit that adjusts the average current flowing through the incandescent lamp through the delay time; the bidirectional thyristor circuit is connected with the zero-crossing detection circuit through the MCU control circuit, such as figure 1 shown.

Embodiment 2

[0024] Optimized on the basis of Embodiment 1, the power supply circuit includes a switching power supply module U5, a first capacitor C2, a second capacitor C3 and a voltage stabilizing chip, and the ground terminal of the voltage stabilizing chip is connected to the ground terminal of the switching power supply U5 through the tenth resistor R4 The input terminal of the voltage regulator chip is connected to the VCC terminal of the switching power supply U5, the first capacitor C2 and the second capacitor C3 are connected in parallel to the VCC terminal and the ground terminal of the switching power supply U5, and the output terminal and the ground terminal of the voltage regulator chip are also connected in parallel There is a third capacitor C4 and a fourth capacitor C5, such as figure 2 shown.

[0025] The power supply circuit in this embodiment converts the 220V alternating current into a low-voltage direct current, and the low-voltage direct current provides operating v...

Embodiment 3

[0027] On the basis of embodiment 2, the optimization is carried out. The MCU control circuit includes a single-chip microcomputer, and the single-chip microcomputer is a PIC16F690 single-chip microcomputer. The bidirectional thyristor circuit is connected to the 11-pin or 13-pin of the PIC16F690 single-chip microcomputer, and the zero-crossing detection circuit is connected to the 17-pin of the PIC16F690 single-chip microcomputer.

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Abstract

The invention discloses a delay conduction circuit of a silicon controlled rectifier. The delay conduction circuit comprises a power supply circuit for providing voltage-stabilizing power for the circuit, a bidirectional silicon controlled rectifier circuit, an MCU control circuit and a zero-crossing detection circuit. The bidirectional silicon controlled rectifier circuit is connected with the zero-crossing detection circuit by the MCU control circuit. According to the delay conduction circuit, conduction of a conduction angle of the silicon controlled rectifier is realized by combination of the silicon controlled rectifier circuit and the zero-crossing detection circuit, so that stability of the conduction angle is improved; a phenomenon of illumination of light is not stable during the intelligent dimming process of the incandescent light bulb can be avoided and thus the human eyes and sight lines can be protected from being affected by the instable light.

Description

technical field [0001] The invention relates to a dimming switch, in particular to a thyristor delay turn-on circuit and a turn-on method thereof. Background technique [0002] In the traditional switch control system, there are only two states of on and off for incandescent lamps. There are two kinds of incandescent lamp dimming in existing smart home systems: one is knob inductive dimming, and the other is controllable Silicon dimming. The first type of dimming has short life, high power consumption, low efficiency, easy to break the knob, and cannot be controlled remotely. In the second type of dimming, the conduction angle is unstable, and the light flickers on and off. As the power increases, the conduction current of the thyristor is large, resulting in large power consumption. Contents of the invention [0003] The object of the present invention is to provide a thyristor delay turn-on circuit and its turn-on method to solve the problem of unstable conduction angl...

Claims

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Application Information

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IPC IPC(8): H05B39/04
CPCH05B39/044Y02B20/00
Inventor 叶龙马涛李银伟陈关涛张松涛
Owner ULTIMATE IOT (SHANGHAI) TECH LTD
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