CN107046418B - Single live wire power-taking circuit - Google Patents
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- CN107046418B CN107046418B CN201710251147.1A CN201710251147A CN107046418B CN 107046418 B CN107046418 B CN 107046418B CN 201710251147 A CN201710251147 A CN 201710251147A CN 107046418 B CN107046418 B CN 107046418B
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Abstract
本发明公开了一种单火线取电电路，包括继电器RLY1、关态取电电路、开态取电电路和继电器驱动电路；关态取电电路的输入端接市电火线，输出端接继电器RLY1的开关输入端，继电器驱动电路一端接控制信号Vi，另一端与继电器RLY1控制线圈的一端连接；继电器RLY1的开关输出端分两路，一路接负载，另一路接开态取电电路，关态时通过双向可控硅SCR1、稳压二极管Z1和稳压二极管Z2产生的压降取电，开态时通过变压器T1、三极管Q2和三极管Q3构成的震荡电路和稳压电路取电，为控制电路提供工作电源，具有发热量小，使用寿命长，功耗低等优点。
The invention discloses a single live wire power taking circuit, comprising a relay RLY1, an off state power taking circuit, an open state power taking circuit and a relay driving circuit; the input end of the off state power taking circuit is connected to the mains live wire, and the output end is connected to the relay RLY1 One end of the relay drive circuit is connected to the control signal Vi, and the other end is connected to one end of the control coil of the relay RLY1; the switch output end of the relay RLY1 is divided into two channels, one is connected to the load, and the other is connected to the on-state power-taking circuit, and the off-state When the power is taken from the voltage drop generated by the bidirectional thyristor SCR1, the Zener diode Z1 and the Zener diode Z2, in the open state, the oscillator circuit and the voltage regulator circuit composed of the transformer T1, the transistor Q2 and the transistor Q3 are used to take the power, which is the control circuit. Provide working power with the advantages of low heat generation, long service life and low power consumption.
Description
技术领域technical field
本发明涉及一种电源，特别是一种交流控制开关的单火线供电电路。The invention relates to a power supply, in particular to a single live wire power supply circuit of an AC control switch.
背景技术Background technique
声控开关、红外感应开关、雷达开关、触控开关等在开关处于关断状态下，就需要单火线取电即关态供电以维持控制电路正常工作，目前的关态供电电路为阻容式的，阻容式的供电电路其电压衰减严重，而且发热量大，寿命较短。When the voice switch, infrared sensor switch, radar switch, touch switch, etc. are in the off state, a single live wire is required to take power, that is, the off-state power supply to maintain the normal operation of the control circuit. The current off-state power supply circuit is a resistance-capacitor type. , The resistance-capacitor power supply circuit has serious voltage attenuation, large heat generation and short life.
发明内容SUMMARY OF THE INVENTION
为了克服现有技术的不足，本发明提供一种发热量小，使用寿命长，功耗低的单火线取电电路。In order to overcome the deficiencies of the prior art, the present invention provides a single live wire power taking circuit with low heat generation, long service life and low power consumption.
本发明解决其技术问题所采用的技术方案是：The technical scheme adopted by the present invention to solve its technical problems is:
一种单火线取电电路，包括继电器RLY1、关态取电电路、开态取电电路和继电器驱动电路；所述关态取电电路的输入端接市电火线，输出端接所述继电器RLY1的开关输入端，所述继电器驱动电路一端接控制信号Vi，另一端与所述继电器RLY1控制线圈的一端连接；所述继电器RLY1的开关输出端分两路，一路接负载，另一路接所述开态取电电路；所述关态取电电路包括桥堆BR1、双向可控硅SCR1、稳压二极管Z1和稳压二极管Z2；所述桥堆BR1的四个接线端顺时针方向依次为火线接入端、控制输出端、火线输出端和接地端；所述火线接入端接所述市电火线，所述控制输出端接所述继电器RLY1控制线圈的另一端，所述火线输出端接所述继电器RLY1的开关输入端，所述接地端接地；所述双向可控硅SCR1的一端接所述桥堆BR1的火线接入端，另一端接所述火线输出端；所述稳压二极管Z1和稳压二极管Z2反向串联后，一端接所述双向可控硅SCR1的控制端，另一端接所述桥堆BR1的火线接入端。A single live wire power taking circuit, comprising a relay RLY1, an off state power taking circuit, an open state power taking circuit and a relay drive circuit; an input end of the off state power taking circuit is connected to a commercial live wire, and an output end is connected to the relay RLY1 One end of the relay drive circuit is connected to the control signal Vi, and the other end is connected to one end of the control coil of the relay RLY1; the switch output end of the relay RLY1 is divided into two channels, one is connected to the load, and the other is connected to the On-state power-taking circuit; the off-state power-taking circuit includes a bridge stack BR1, a triac SCR1, a Zener diode Z1 and a Zener diode Z2; the four terminals of the bridge stack BR1 are live wires in a clockwise direction an access terminal, a control output terminal, a live wire output terminal and a ground terminal; the live wire access terminal is connected to the mains live wire, the control output terminal is connected to the other end of the control coil of the relay RLY1, and the live wire output terminal is connected to The switch input end of the relay RLY1, the ground end is grounded; one end of the triac SCR1 is connected to the live wire access end of the bridge stack BR1, and the other end is connected to the live wire output end; the Zener diode After Z1 and Zener diode Z2 are connected in reverse series, one end is connected to the control end of the triac SCR1, and the other end is connected to the live wire access end of the bridge stack BR1.
所述继电器驱动电路包括NPN型三极管Q1，所述三极管Q1的基极通过电阻R1接所述控制信号Vi，发射极接地，集电极与所述继电器RLY1控制线圈的一端连接。The relay driving circuit includes an NPN transistor Q1, the base of the transistor Q1 is connected to the control signal Vi through a resistor R1, the emitter is grounded, and the collector is connected to one end of the control coil of the relay RLY1.
所述继电器RLY1控制线圈的两端之间并联有二极管D1。A diode D1 is connected in parallel between two ends of the control coil of the relay RLY1.
所述开态取电电路包括NPN型三极管Q2、NPN型三极管Q3和变压器T1；所述变压器T1设置有同铁芯的三个绕组，第一个绕组的一端通过电容C3接地，第二个绕组的一端接地，第三个绕组的一端接地；所述三极管Q3、三极管Q2的集电极共接后依次通过电阻R3、电阻R2和二极管D2接所述继电器RLY1的开关输出端；所述三极管Q2的发射极接地；所述三极管Q3的发射极通过并联的电容C1和电阻R5接地；所述第一个绕组的另一端分两路，一路接所述三极管Q3的基极，另一路接所述电阻R3和电阻R2的结点；所述第二个绕组的另一端通过电容C2接所述三极管Q3、三极管Q2的集电极与电阻R3的结点；所述第三个绕组的另一端依次通过二极管D3、稳压二极管Z3、电阻R4接所述三极管Q2的基极；并在所述二极管D3和稳压二极管Z3的结点和地之间连接有电容EC1。The open-state power taking circuit includes an NPN transistor Q2, an NPN transistor Q3 and a transformer T1; the transformer T1 is provided with three windings with the same iron core, one end of the first winding is grounded through the capacitor C3, and the second winding is grounded. One end of the third winding is grounded, and one end of the third winding is grounded; the collectors of the triode Q3 and the triode Q2 are connected to the switch output end of the relay RLY1 through the resistor R3, the resistor R2 and the diode D2 in turn; The emitter is grounded; the emitter of the transistor Q3 is grounded through the parallel capacitor C1 and the resistor R5; the other end of the first winding is divided into two paths, one is connected to the base of the transistor Q3, and the other is connected to the resistor The node of R3 and resistor R2; the other end of the second winding is connected to the node of the transistor Q3, the collector of the transistor Q2 and the resistor R3 through the capacitor C2; the other end of the third winding passes through the diode in turn D3, zener diode Z3 and resistor R4 are connected to the base of the transistor Q2; and a capacitor EC1 is connected between the junction of the diode D3 and the zener diode Z3 and the ground.
本发明的有益效果是：本发明在关态时通过双向可控硅SCR1、稳压二极管Z1和稳压二极管Z2产生的压降取电，在开态时通过变压器T1、三极管Q2和三极管Q3构成的震荡电路和稳压电路取电，为控制电路提供工作电源，具有发热量小，使用寿命长，功耗低等优点。The beneficial effects of the present invention are as follows: the present invention uses the voltage drop generated by the bidirectional thyristor SCR1, the zener diode Z1 and the zener diode Z2 to obtain electricity in the off state, and forms the transformer T1, the triode Q2 and the triode Q3 in the on state The oscillating circuit and voltage-stabilizing circuit of the device take power to provide working power for the control circuit, which has the advantages of small heat generation, long service life and low power consumption.
附图说明Description of drawings
下面结合附图和实施例对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
图1是本发明的电路原理图。Fig. 1 is the circuit principle diagram of the present invention.
具体实施方式Detailed ways
参照图1，一种单火线取电电路，包括继电器RLY1、关态取电电路、开态取电电路和继电器驱动电路；所述关态取电电路的输入端接市电火线，输出端接所述继电器RLY1的开关输入端，所述继电器驱动电路一端接控制信号Vi，另一端与所述继电器RLY1控制线圈的一端连接；所述继电器RLY1的开关输出端分两路，一路接负载，另一路接所述开态取电电路。Referring to Fig. 1, a single live wire power taking circuit includes a relay RLY1, an off state power taking circuit, an open state power taking circuit and a relay drive circuit; the input end of the off state power taking circuit is connected to the mains live wire, and the output end is connected The switch input end of the relay RLY1, one end of the relay drive circuit is connected to the control signal Vi, the other end is connected to one end of the control coil of the relay RLY1; the switch output end of the relay RLY1 is divided into two channels, one is connected to the load, and the other is connected to the load. All the way is connected to the open-state power taking circuit.
所述关态取电电路包括桥堆BR1、双向可控硅SCR1、稳压二极管Z1和稳压二极管Z2；所述桥堆BR1的四个接线端顺时针方向依次为火线接入端、控制输出端、火线输出端和接地端；所述火线接入端接所述市电火线，所述控制输出端接所述继电器RLY1控制线圈的另一端，所述火线输出端接所述继电器RLY1的开关输入端，所述接地端接地；所述双向可控硅SCR1的一端接所述桥堆BR1的火线接入端，另一端接所述火线输出端；所述稳压二极管Z1和稳压二极管Z2反向串联后，一端接所述双向可控硅SCR1的控制端，另一端接所述桥堆BR1的火线接入端。The off-state power taking circuit includes a bridge stack BR1, a triac SCR1, a Zener diode Z1 and a Zener diode Z2; the four terminals of the bridge stack BR1 are the live wire access terminal, the control output terminal and the control output terminal in turn in a clockwise direction. terminal, live wire output terminal and ground terminal; the live wire access terminal is connected to the mains live wire, the control output terminal is connected to the other end of the control coil of the relay RLY1, and the live wire output terminal is connected to the switch of the relay RLY1 Input terminal, the ground terminal is grounded; one end of the triac SCR1 is connected to the live wire access terminal of the bridge stack BR1, and the other end is connected to the live wire output terminal; the Zener diode Z1 and Zener diode Z2 After reverse series connection, one end is connected to the control end of the triac SCR1, and the other end is connected to the live wire access end of the bridge stack BR1.
所述继电器驱动电路包括NPN型三极管Q1，所述三极管Q1的基极通过电阻R1接所述控制信号Vi，发射极接地，集电极与所述继电器RLY1控制线圈的一端连接。The relay driving circuit includes an NPN transistor Q1, the base of the transistor Q1 is connected to the control signal Vi through a resistor R1, the emitter is grounded, and the collector is connected to one end of the control coil of the relay RLY1.
所述继电器RLY1控制线圈的两端之间并联有二极管D1。A diode D1 is connected in parallel between two ends of the control coil of the relay RLY1.
所述开态取电电路包括NPN型三极管Q2、NPN型三极管Q3和变压器T1；所述变压器T1设置有同铁芯耦合的三个绕组，第一个绕组的一端通过电容C3接地，第二个绕组的一端接地，第三个绕组的一端接地；所述三极管Q3、三极管Q2的集电极共接后依次通过电阻R3、电阻R2和二极管D2接所述继电器RLY1的开关输出端；所述三极管Q2的发射极接地；所述三极管Q3的发射极通过并联的电容C1和电阻R5接地；第一个绕组的另一端分两路，一路接所述三极管Q3的基极，另一路接所述电阻R3和电阻R2的结点；所述第二个绕组的另一端通过电容C2接所述三极管Q3、三极管Q2的集电极与电阻R3的结点；所述第三个绕组的另一端依次通过二极管D3、稳压二极管Z3、电阻R4接所述三极管Q2的基极；并在所述二极管D3和稳压二极管Z3的结点和地之间连接有电容EC1。The open-state power taking circuit includes an NPN transistor Q2, an NPN transistor Q3 and a transformer T1; the transformer T1 is provided with three windings coupled with the iron core, one end of the first winding is grounded through the capacitor C3, and the second winding is grounded through the capacitor C3. One end of the winding is grounded, and one end of the third winding is grounded; the collectors of the triode Q3 and the triode Q2 are connected to the switch output end of the relay RLY1 through the resistor R3, the resistor R2 and the diode D2 in turn; the triode Q2 The emitter of the transistor Q3 is grounded; the emitter of the transistor Q3 is grounded through the parallel capacitor C1 and the resistor R5; the other end of the first winding is divided into two paths, one path is connected to the base of the transistor Q3, and the other path is connected to the resistor R3 and the node of the resistor R2; the other end of the second winding is connected to the node of the transistor Q3, the collector of the transistor Q2 and the resistor R3 through the capacitor C2; the other end of the third winding passes through the diode D3 in turn , Zener diode Z3 and resistor R4 are connected to the base of the transistor Q2; and a capacitor EC1 is connected between the node of the diode D3 and the Zener diode Z3 and the ground.
电阻R1、电阻R2、电阻R3、电阻R4、电阻R5起限流作用，二极管D1为起续流作用，三极管Q1、三极管Q2、三极管Q3起开关作用，二极管D2、二极管D3起整流作用，电容C1和电阻R5构成放电回路，电容C2、电容C3为反馈电容，电容EC1为滤波电容，三极管Q3构成稳压电路。关态时，控制电路没有控制信号Vi输入（控制信号Vi为低电平）时，三极管Q1截止，继电器RLY1处于释放状态，控制电路所需的电压靠双向可控硅SCR1两端的电压提供工作电源（控制输出端为取电端口），有控制信号Vi输入（控制信号Vi为高电平）时，三极管Q1导通，继电器RLY1处于吸合状态，同时稳压二极管Z1和稳压二极管Z2导通，双向可控硅SCR1两端的电压降低到1-3.5V之间，不能为控制电路提供足够的工作电源，三极管Q2、电容C3构成的振荡电路将电压升高到12V或24V，为控制电路提供工作电源，具有发热量小，使用寿命长，功耗低等优点。Resistor R1, resistor R2, resistor R3, resistor R4, and resistor R5 play a current limiting role, diode D1 plays a freewheeling role, transistor Q1, transistor Q2, and transistor Q3 play a switching role, diode D2, diode D3 play a rectifying role, and capacitor C1 and resistor R5 form a discharge loop, capacitor C2 and capacitor C3 are feedback capacitors, capacitor EC1 is a filter capacitor, and transistor Q3 forms a voltage regulator circuit. In the off state, when the control circuit has no control signal Vi input (the control signal Vi is low level), the transistor Q1 is turned off, the relay RLY1 is in the release state, and the voltage required by the control circuit is provided by the voltage across the triac SCR1. (The control output terminal is the power taking port), when the control signal Vi is input (the control signal Vi is high level), the transistor Q1 is turned on, the relay RLY1 is in the pull-in state, and the Zener diode Z1 and Zener diode Z2 are turned on. , the voltage at both ends of the triac SCR1 is reduced to between 1-3.5V, which cannot provide enough working power for the control circuit. The oscillation circuit composed of the transistor Q2 and the capacitor C3 increases the voltage to 12V or 24V, which provides the control circuit. The working power supply has the advantages of low heat generation, long service life and low power consumption.
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| CN108882483B (en) * | 2018-07-09 | 2024-01-26 | 成都电精灵电力科技有限公司 | Three-way control single live wire power taking system |
| CN111491423B (en) * | 2020-03-27 | 2022-07-05 | 普联技术有限公司 | Single-fire switch circuit and single-fire switch device |
| CN113808886B (en) * | 2021-09-30 | 2025-03-18 | 天津华来科技股份有限公司 | A wireless smart wall switch with on-screen display of time and environmental information |
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| CN203942508U (en) * | 2014-05-28 | 2014-11-12 | 福建侨汇电子科技有限公司 | Single live wire type Intelligent remote-controlled touch switch |
| CN204217167U (en) * | 2014-09-04 | 2015-03-18 | 厦门网拓科技有限公司 | Single live wire touches lamp control switch |
| CN204616153U (en) * | 2015-04-22 | 2015-09-02 | 安徽信安通讯技术有限公司 | A kind of fiery power-supply circuit of list of single live wire switch |
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| Publication number | Publication date |
|---|---|
| CN107046418A (en) | 2017-08-15 |
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Effective date of registration: 20221018 Address after: 271000 Middle Road, Beijipo Industrial Park, High tech Zone, Tai'an City, Shandong Province Patentee after: Tai'an Dongfang Printed Board Co.,Ltd. Address before: 528400 3rd floor, No. 85, second Taiyu Road, Jidong, Xiaolan Town, Zhongshan City, Guangdong Province Patentee before: Liu Shengquan |
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