CN211184370U - Low-power consumption single live wire switch light modulator - Google Patents
Low-power consumption single live wire switch light modulator Download PDFInfo
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- CN211184370U CN211184370U CN201922222088.2U CN201922222088U CN211184370U CN 211184370 U CN211184370 U CN 211184370U CN 201922222088 U CN201922222088 U CN 201922222088U CN 211184370 U CN211184370 U CN 211184370U
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Abstract
The utility model provides a single live wire switch dimmer of low-power consumption, it includes AC-DC power supply circuit, control module, bidirectional thyristor drive circuit, power input end and AC-DC power supply circuit, bidirectional thyristor drive circuit and exchange zero crossing detection circuitry and be connected, AC-DC power supply circuit, bidirectional thyristor drive circuit are connected with control module respectively, bidirectional thyristor drive circuit is connected with AC-DC power supply circuit, bidirectional thyristor drive circuit is connected with the load. Adopt the technical scheme of the utility model, make lamps and lanterns can not appear twinkling or the problem of shining a little after closing to the system consumption of single live wire has further been reduced.
Description
Technical Field
The utility model relates to a light modulator especially relates to a single live wire switch light modulator of low-power consumption.
Background
In daily life, a single live wire lighting switch is generally controlled by a simple mechanical switch, and the on and off of one live wire are controlled through the mechanical switch, so that the on and off of the lamp are controlled, but the service life of the mechanical switch is short. Under the influence of the high-speed development of the internet of things, the smart home is in explosive growth, and along with the further implementation of the market popularization of the smart home, the intelligent single-live-wire switch and the single-live-wire dimmer gradually replace the traditional mechanical single-live-wire switch or dimmer. And current single live wire dimmer switch of intelligence, when the standby, because input current is too big leads to appearing the phenomenon of twinkling or slightly shining after lamps and lanterns close easily, the consumption is high.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model discloses a single live wire switch light modulator of low-power consumption has solved current single live wire light modulator when the standby, because input current leads to the lamps and lanterns to close the back and appear twinkling or the problem of shining a little too greatly.
To this end, the technical scheme of the utility model is that:
a low-power-consumption single-live-wire switching dimmer comprises an AC-DC power supply circuit, a control module and a bidirectional thyristor drive circuit, wherein a power input end is connected with the AC-DC power supply circuit and the bidirectional thyristor drive circuit, the AC-DC power supply circuit and the bidirectional thyristor drive circuit are respectively connected with the control module, the bidirectional thyristor drive circuit is connected with the AC-DC power supply circuit, and the bidirectional thyristor drive circuit is connected with a load.
The AC-DC power supply circuit supplies power to the whole system, and the control module outputs signals to drive the bidirectional controllable silicon so as to realize the opening or closing of the output load.
As a further improvement of the present invention, the triac driving circuit includes a triac Q1, a zener diode D1, a zener diode D2, a switch Q2, a resistor R1, a resistor R2, and a photoelectric coupler U2, wherein an AC1 end of the AC-DC power supply circuit is connected to a first terminal of the triac Q1 and an output end of the photoelectric coupler U2, another output end of the photoelectric coupler U2 is connected to an anode of the zener diode D2, a cathode of the zener diode D2 is connected to a cathode of the zener diode D1, an anode of the zener diode D1 is connected to a control electrode of the triac Q1 and one end of the rc parallel circuit, and a second terminal of the triac Q1 and the other end of the rc parallel circuit are grounded;
the VDD end of the AC-DC power supply circuit is connected with one input end of a photoelectric coupler U2 through a resistor R1, the control module is connected with a switch tube Q2 through a resistor R2, and the switch tube Q2 is connected with the other input end of the photoelectric coupler U2.
By adopting the technical scheme, the trigger voltage of the bidirectional thyristor is improved by utilizing the voltage stabilizing diode, so that the bidirectional thyristor is conducted in a delayed manner, and the power taking of a single live wire is realized. According to the technical scheme, a zero-crossing signal is not needed, and the single live wire power taking can be realized without the chip control of a control module.
As a further improvement of the present invention, the switching tube Q2 is a triode or a MOS tube.
As a further improvement, the low-power consumption single live wire switch dimmer comprises an alternating current zero-crossing detection circuit, the alternating current zero-crossing detection circuit is connected with alternating current input and output both ends of the bidirectional thyristor circuit, and the zero-crossing signal end of the alternating current zero-crossing detection circuit is connected with the control module. By adopting the technical scheme, the working or standby current of the system is further reduced, the alternating current zero-crossing detection circuit is used for detecting the input alternating current zero point and transmitting the input alternating current zero point to the control module, and the pulse signal is output to drive the bidirectional controllable silicon.
As a further improvement of the present invention, the bidirectional thyristor driving circuit includes a first bidirectional thyristor Q21, a second bidirectional thyristor Q22, a resistor R21, a resistor R22, and a resistor R23, and an AC1 terminal of the AC-DC power supply circuit is connected to a first terminal of the second bidirectional thyristor Q22; the control module is connected with the control ends of a resistor R22 and a second bidirectional thyristor Q22 through a resistor R21, the first terminal of the second bidirectional thyristor Q22 is connected with the first terminal of a first bidirectional thyristor Q21 through a resistor R23, the control end of the first bidirectional thyristor Q21 is connected with the second terminal of the second bidirectional thyristor Q22 and one end of a resistor-capacitor parallel circuit, and the other end of the resistor-capacitor parallel circuit, the resistor R22 and the second terminal of the first bidirectional thyristor Q21 are grounded.
By adopting the technical scheme, the single live wire can be used without using a photoelectric coupler and a triode.
As a further improvement of the present invention, the control module comprises an MCU or a communication module, wherein the communication module can be a WiFi, B L E, Zigbee module.
As a further improvement of the present invention, the ac zero crossing detection circuit includes a first schottky diode D11, a second schottky diode D12, a resistor 13, a resistor 17, an operational amplifier U12, an output of the single live wire switch or the dimmer is connected to a non-inverting input terminal of the operational amplifier U12 through a resistor R13, a first schottky diode D11, a second schottky diode D12, and a resistor R17 are connected in parallel between the non-inverting input terminal and an inverting input terminal of the operational amplifier U12, wherein a negative electrode of the first schottky diode D11 is connected to a positive electrode of the second schottky diode D12, and the inverting input terminal of the operational amplifier U12 is grounded;
the output end of the operational amplifier U12 is connected with the ZCD end of the control module, and the power supply end of the operational amplifier U12 is connected with the VCC end of the control module.
As a further improvement of the utility model, low-power consumption list live wire switch dimmer includes two way or multichannel bidirectional thyristor drive circuit who is connected with the load respectively, two way or multichannel bidirectional thyristor drive circuit are connected with two way or multichannel interchange zero crossing detection circuitry respectively, two way or multichannel interchange zero crossing detection circuitry's zero crossing signal end is connected with control module. In a switch or a dimmer with multiple loads coexisting, the alternating current zero crossing point detection circuit can also be used for detecting whether the load exists or not.
As a further improvement of the utility model, the AC-DC power supply circuit comprises an AC-DC voltage conversion circuit, a capacitor C5, a capacitor C6, an inductor L1, a resistor R20 and a rectification circuit, wherein the AC-DC voltage conversion circuit is connected with one end of the inductor L1, one end of the resistor R20 and the positive electrode of the capacitor C6, the other end of the resistor R20 is connected with the positive electrode of the capacitor C5, the other end of the inductor L1 and the rectification circuit, the negative electrode of the capacitor C5 and the negative electrode of the capacitor C6 are grounded, and the AC-DC voltage conversion circuit is connected with the VDD end of the control module.
As a further improvement of the present invention, the rectifier circuit is connected to the load through a fuse F1.
As a further improvement of the present invention, the AC-DC voltage converting circuit is a BUCK, Flyback, L DO or RCC voltage converting circuit.
Compared with the prior art, the beneficial effects of the utility model are that:
the technical scheme of the utility model utilizes the Zener diode to improve the trigger voltage of the bidirectional thyristor, provides voltage for the work of the AD-DC partial circuit and realizes the function of taking electricity by a single live wire; the zero detection of the alternating current electric signal under the condition of zero line access is realized by using an operational amplifier through a single live wire alternating current zero detection circuit and a single live wire load detection circuit, and meanwhile, the zero detection can be used as the load detection of a single live wire; the low-power consumption bidirectional thyristor driving mode is adopted, bidirectional thyristors are driven in a pulse mode, power consumption of a single live wire switch or a dimmer is further reduced, the problem of flickering or slight brightness of the lamp after the lamp is closed is avoided, and system power consumption of a single live wire is further reduced.
Drawings
Fig. 1 is a circuit block diagram of a low-power consumption single live wire dimmer according to embodiment 1 of the present invention.
Fig. 2 is a circuit diagram of the triac driving circuit according to embodiment 1 of the present invention.
Fig. 3 is a circuit diagram of a low-power consumption single live wire dimmer according to embodiment 1 of the present invention.
Fig. 4 is a circuit block diagram of a low-power consumption single live wire dimmer according to embodiment 2 of the present invention.
Fig. 5 is a circuit diagram of a bidirectional thyristor drive circuit according to embodiment 2 of the present invention.
Fig. 6 is a circuit diagram of an ac zero-crossing detection circuit according to embodiment 2 of the present invention.
Fig. 7 is a circuit diagram of a low power consumption single live wire dimmer according to embodiment 2 of the present invention.
Fig. 8 is a circuit diagram of a low power consumption single live wire dimmer according to embodiment 3 of the present invention connected to two loads.
Fig. 9 is a flow chart of the switching or dimming operation of the low power consumption single live wire dimmer of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a low-power consumption single live wire dimmer is a low-power consumption single live wire switching dimmer, and comprises an AC-DC power supply circuit, a control module, and a bidirectional thyristor drive circuit, wherein the power input end is connected with the AC-DC power supply circuit and the bidirectional thyristor drive circuit, the AC-DC power supply circuit and the bidirectional thyristor drive circuit are respectively connected with the control module, the bidirectional thyristor drive circuit is connected with the AC-DC power supply circuit, and the bidirectional thyristor drive circuit is connected with a load. The control module comprises an MCU or a communication module. Specifically, as shown in fig. 2, the triac driving circuit includes a triac Q1, a zener diode D1, a zener diode D2, a switching tube Q2, a resistor R1, a resistor R2, and a photocoupler U2, an AC terminal of the AC-DC power supply circuit is connected to a first terminal of the triac Q1 and an output terminal of the photocoupler U2, another output terminal of the photocoupler U2 is connected to an anode of the zener diode D2, a cathode of the zener diode D2 is connected to a cathode of the zener diode D1, an anode of the zener diode D1 is connected to a control electrode of the triac Q1 and one end of the resistance-capacitance parallel circuit, and a second terminal of the triac Q1 and the other end of the resistance-capacitance parallel circuit are grounded; the VDD end of the AC-DC power supply circuit is connected with one input end of a photoelectric coupler U2 through a resistor R1, the MCU or the communication module is connected with a switch tube Q2 through a resistor R2, and the switch tube Q2 is connected with the other input end of the photoelectric coupler U2. The switching tube Q2 is a triode or a MOS tube.
As shown in FIG. 3, the AC-DC power supply circuit comprises an AC-DC voltage conversion circuit, a capacitor C5, a capacitor C6, an inductor L1, a resistor R20 and a rectification circuit, wherein the AC-DC voltage conversion circuit is connected with one end of the inductor L1, one end of the resistor R20 and the positive electrode of the capacitor C6, the other end of the resistor R20 is connected with the positive electrode of the capacitor C5, the other end of the inductor L1 and the rectification circuit, the negative electrode of the capacitor C5 and the negative electrode of the capacitor C6 are grounded, the AC-DC voltage conversion circuit is connected with the VDD end of an MCU or a communication module, the rectification circuit is connected with a load and the first terminal of a Q21 of a bidirectional thyristor drive circuit through a fuse F1, the AC-DC voltage conversion circuit is a BUCK, Flyback, L or RCC voltage conversion circuit, and the end of the AC-DC voltage conversion circuit is connected with the MCU or the communication module and grounded through the capacitor C7.
In the single live wire power-taking circuit mode one of the embodiments, voltage is provided for the AC-DC partial circuit by using the voltage drop across the triac Q1, so as to supply power to the MCU or the communication module, and thus, single live wire power taking is achieved, as shown in fig. 3, when the single live wire switch is in a lamp-off state, the voltage across the triac Q1 is equal to the input voltage Vac, and after rectification, the voltage across the triac Q5, the triac C6, and the filtered voltage VDD required for the AC-DC power supply circuit to be partially converted into the system voltage VDD, so as to provide voltage for the entire single live wire system.
Example 2
As shown in fig. 4, a low power consumption single live wire dimmer comprises an AC-DC power supply circuit, a control module, a bidirectional thyristor drive circuit, and an alternating current zero crossing detection circuit, wherein the power input end is connected with the AC-DC power supply circuit, the bidirectional thyristor drive circuit, and the alternating current zero crossing detection circuit, the AC-DC power supply circuit and the bidirectional thyristor drive circuit are respectively connected with the control module, the bidirectional thyristor drive circuit is connected with the AC-DC power supply circuit, the bidirectional thyristor drive circuit is connected with a load, the alternating current zero crossing detection circuit is connected with both ends of alternating current input and output of the bidirectional thyristor drive circuit, and a zero crossing signal end of the alternating current zero crossing detection circuit is connected with the control module, the control module comprises an MCU or a communication module, wherein the communication module can be a WiFi or a B L E, Zigbee module.
As shown in fig. 5, the triac driving circuit includes a first triac Q21, a second triac Q22, a resistor R21, a resistor R22, and a resistor R23, wherein an AC terminal of the AC-DC power supply circuit is connected to a first terminal of a second triac Q22; the MCU is connected with a resistor R22 and a control end of a second bidirectional thyristor Q22 through a resistor R21, a first terminal of the second bidirectional thyristor Q22 is connected with a first terminal of a first bidirectional thyristor Q21 through a resistor R23, a control end of the first bidirectional thyristor Q21 is connected with a second terminal of the second bidirectional thyristor Q22 and one end of a resistor-capacitor parallel circuit, and the other end of the resistor-capacitor parallel circuit, the resistor R22 and a second terminal of the first bidirectional thyristor Q21 are grounded.
As shown in fig. 6, the ac zero crossing detection circuit includes a first schottky diode D11, a second schottky diode D12, a resistor 13, a resistor 17, and an operational amplifier U12, wherein an output terminal of the single-hot switch or the dimmer is connected to a non-inverting input terminal of the operational amplifier U12 through a resistor R13, a first schottky diode D11, a second schottky diode D12, and a resistor R17 are connected in parallel between the non-inverting input terminal and an inverting input terminal of the operational amplifier U12, a negative electrode of the first schottky diode D11 is connected to a positive electrode of the second schottky diode D12, and the inverting input terminal of the operational amplifier U12 is grounded; the output end of the operational amplifier U12 is connected with the ZCD end of the MCU, and the power supply end of the operational amplifier U12 is connected with the VCC end of the control module.
The technical scheme is that an operational amplifier is used for making an open-loop zero-crossing comparator, a single-live-wire zero-crossing alternating current detection circuit is connected to two AC ends, namely two AC input ends and two AC output ends, of a bidirectional thyristor Q13, and a zero-crossing signal is connected to an MCU or a communication module. The reverse phase input end of the U1 is connected with GND (alternating current) input end, the voltage comparison threshold is 0, the output end of a single live wire switch or a dimmer is connected with the non-inverting input end of the U12 after being limited by a resistor R13, and the input common-mode voltage of the U12 is ensured to be within the rated range of the input common-mode voltage under the clamping of Schottky diodes D11 and D12. When a single live wire switch or a dimmer is in a light-off state, the voltage at two ends of the bidirectional thyristor Q13 is equal to the input voltage and is a complete sine wave, similarly, the voltage at the non-inverting input end of the U12 is also a complete sine wave, when the non-inverting input voltage Ui + of the U12 is greater than 0V, the U12 outputs a high level, and when the non-inverting input voltage Ui + of the U12 is less than 0V, the U12 outputs a low level, so that a square wave following an alternating current input zero point is obtained. When a single live wire switch or a dimmer is in open or phase-cut output, because the conduction voltage drop exists when the bidirectional thyristor Q13 is conducted, and the input voltage is a sine wave with positive and negative voltages, the conduction voltage drop of the bidirectional thyristor Q13 also has positive and negative values, similarly, when the in-phase input voltage Ui + of the U12 is greater than 0V, the U12 outputs high level, and when the in-phase input voltage Ui + of the U1 is less than 0V, the U12 outputs low level, so that a square wave following the AC input zero point is obtained.
As shown in FIG. 7, the AC-DC power supply circuit comprises an AC-DC voltage conversion circuit, a capacitor C21, a capacitor C22, an inductor L1, a resistor R2 and a rectification circuit, wherein the AC-DC voltage conversion circuit is connected with one end of the inductor L1, one end of the resistor R2 and the positive electrode of the capacitor C22, the other end of the resistor R2 is connected with the positive electrode of the capacitor C21, the other end of the inductor L1 and the rectification circuit, the negative electrode of the capacitor C21 and the negative electrode of the capacitor C22 are grounded, the AC-DC voltage conversion circuit is connected with the VDD end of the MCU, the rectification circuit is connected with a load and the first terminal of the Q22 of the bidirectional thyristor drive circuit through a fuse F1, the AC-DC voltage conversion circuit is a BUCK, a Flyback, L or RCC voltage conversion circuit, and the VDD end of the AC-DC voltage conversion circuit is connected with the MCU or the communication module and is grounded through a capacitor C23.
When a single live wire switch or a dimmer is in a load off state, the voltage at two ends of the bidirectional thyristor Q22 is equal to the input voltage Vac, and the rectified voltage, the capacitor C21, the capacitor C22 and the filtered voltage VDD required by the system for converting the single live wire switch or the dimmer into the voltage VDD required by the system are supplied to the whole single live wire system.
Under the condition of no alternating current zero-crossing signal, the single live wire switch needs to apply uninterrupted trigger signals on the trigger electrode to turn on the bidirectional thyristor, the bidirectional thyristor Q22 and the resistor R23 continuously consume power, so that the working current of a single live wire system is greatly increased, and the compatibility of the single live wire system to a low-power load is reduced. In fact, after the bidirectional thyristor is triggered to be conducted, the thyristor is still conducted after the trigger level is removed, and the thyristor is not turned off until the voltage at the two ends of the thyristor is 0. In order to further reduce the power consumption of the single-live-wire system, the MCU or the communication module catches an alternating current zero point and drives the bidirectional controllable silicon by a pulse signal after delaying for a certain time. The time delay T is started at the input alternating current zero point, and then the MCU or the communication module outputs a pulse with high level time T to trigger the double-bidirectional thyristor Q22 to be conducted so as to trigger the bidirectional thyristor Q23 to be conducted; therefore, the power of the bidirectional thyristor Q22 and the resistor R23 only consumes 2t of time in a sine period, the working current of a single live wire system is greatly reduced, and the compatibility of a single live wire to various types of low-power loads is improved. The smaller the time t, the lower the power consumption, but t must be sufficient to fully trigger the conduction of the triac Q22. In a single live wire dimmer, the smaller T, the greater the dimming output power, and conversely the smaller the dimming output power. The smaller the T is, the smaller the voltage obtained by the AC-DC module from the two ends of the bidirectional triode thyristor is, so that the minimum value of the T can meet the condition that the voltage at the two ends of the bidirectional triode thyristor can provide enough voltage to maintain the normal work of the AC-DC module when the load is switched on; the maximum value of T + T cannot be greater than the half cycle of the input ac.
Example 3
On the basis of the embodiment 2, in a single-live-wire switch or a dimmer with two or more loads outputting, two or more bidirectional thyristor drive circuits are respectively connected with two or more loads, the two or more bidirectional thyristor drive circuits are respectively connected with two or more alternating-current zero-crossing detection circuits, and zero-crossing signal ends of the two or more alternating-current zero-crossing detection circuits are connected with an MCU (microprogrammed control unit) or a communication module. The input alternating current zero-crossing signal of the alternating current zero-crossing detection circuit also acts on a load detection signal of the single live wire switch or the dimmer, so that the power consumption of the single live wire system is further reduced. As shown in fig. 8, the single-live-wire switch has two outputs, only one of the two outputs is connected with a load, the single-live-wire system can work normally, and each output has an independent alternating-current zero-crossing detection circuit. When one load needs to be opened, the MCU or the communication module firstly detects whether the load has a zero-crossing signal, and if so, a pulse signal is output to drive the optocoupler to trigger the bidirectional triode thyristor; if not, the pulse signal is not output. Therefore, the power consumption of the single-firewire system can be further reduced.
Fig. 9 is a flowchart illustrating the operation of the single live wire switching dimmer of the present invention, wherein the switching or dimming process is described. When the single-live-wire system starts to work after the power supply is switched on, the internal MCU or the wireless communication module starts to initialize, whether a load opening command exists or not is judged after the initialization is finished, and if the single-live-wire system does not enter a deep sleep state according to the load opening command, the power consumption of the system is reduced to the lowest; if a load opening command exists, the MCU or the wireless communication module firstly opens the input alternating current zero-crossing detection module to capture the zero point and the period of the current input voltage, if the zero-crossing detection module cannot capture the zero point and the frequency, the MCU or the wireless communication module considers that the output of the circuit is not connected with the load, and the system cannot output a pulse signal and closes the zero-crossing detection module to enter a deep sleep state; if the zero point and the period of the input voltage are captured, the single live wire system outputs a pulse signal with high level time T after the zero point time delay time T so as to trigger the bidirectional triode thyristor to be conducted, and at the moment, the load is turned on. If receiving the dimming command, the single live wire system changes the value of T according to the dimming value to obtain the dimming load output with corresponding size. And if a load closing command is received, the system phase stops outputting the pulse and closes the zero-crossing detection module to enter a deep sleep state.
The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the shape and structure of the present invention are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a single live wire switching light modulator of low-power consumption which characterized in that: the low-power-consumption single-live-wire switching dimmer comprises an AC-DC power supply circuit, a control module and a bidirectional thyristor drive circuit, wherein the power input end of the low-power-consumption single-live-wire switching dimmer is connected with the AC-DC power supply circuit and the bidirectional thyristor drive circuit, the AC-DC power supply circuit and the bidirectional thyristor drive circuit are respectively connected with the control module, the bidirectional thyristor drive circuit is connected with the AC-DC power supply circuit, and the bidirectional thyristor drive circuit is connected with a load.
2. The low power consumption single hot wire switching dimmer of claim 1, wherein: the bidirectional thyristor drive circuit comprises a bidirectional thyristor Q1, a voltage-stabilizing diode D1, a voltage-stabilizing diode D2, a switch tube Q2, a resistor R1, a resistor R2 and a photoelectric coupler U2, wherein the AC end of the AC-DC power supply circuit is connected with the first terminal of the bidirectional thyristor Q1 and one output end of the photoelectric coupler U2, the other output end of the photoelectric coupler U2 is connected with the anode of the voltage-stabilizing diode D2, the cathode of the voltage-stabilizing diode D2 is connected with the cathode of the voltage-stabilizing diode D1, the anode of the voltage-stabilizing diode D1 is connected with the control electrode of the bidirectional thyristor Q1 and one end of the resistance-capacitance parallel circuit, and the second terminal of the bidirectional thyristor Q1 and the other end of the resistance-capacitance parallel circuit are grounded;
the VDD end of the AC-DC power supply circuit is connected with one input end of a photoelectric coupler U2 through a resistor R1, the control module is connected with a switch tube Q2 through a resistor R2, and the switch tube Q2 is connected with the other input end of the photoelectric coupler U2.
3. The low power consumption single hot wire switching dimmer of claim 2, wherein: the switching tube Q2 is a triode or an MOS tube.
4. The low power consumption single hot wire switching dimmer of claim 1, wherein: the bidirectional thyristor controlled rectifier circuit comprises an alternating current zero-crossing detection circuit, wherein the alternating current zero-crossing detection circuit is connected with the alternating current input end and the alternating current output end of the bidirectional thyristor controlled rectifier circuit, and the zero-crossing signal end of the alternating current zero-crossing detection circuit is connected with a control module.
5. The low power consumption single hot wire switching dimmer of claim 4, wherein: the bidirectional thyristor driving circuit comprises a first bidirectional thyristor Q21, a second bidirectional thyristor Q22, a resistor R21, a resistor R22 and a resistor R23, wherein the AC end of the AC-DC power supply circuit is connected with a first terminal of a second bidirectional thyristor Q22;
the control module is connected with the control ends of a resistor R22 and a second bidirectional thyristor Q22 through a resistor R21, the first terminal of the second bidirectional thyristor Q22 is connected with the first terminal of a first bidirectional thyristor Q21 through a resistor R23, the control end of the first bidirectional thyristor Q21 is connected with the second terminal of the second bidirectional thyristor Q22 and one end of a resistor-capacitor parallel circuit, and the other end of the resistor-capacitor parallel circuit, the resistor R22 and the second terminal of the first bidirectional thyristor Q21 are grounded.
6. The low power consumption single hot wire switching dimmer of claim 5, wherein: the alternating-current zero-crossing detection circuit comprises a first Schottky diode D11, a second Schottky diode D12, a resistor 13, a resistor 17 and an operational amplifier U12, wherein the output end of a single-live wire switch or a dimmer is connected with the non-inverting input end of the operational amplifier U12 through a resistor R13, a first Schottky diode D11, a second Schottky diode D12 and a resistor R17 are connected between the non-inverting input end and the inverting input end of the operational amplifier U12 in parallel, the negative electrode of a first Schottky diode D11 is connected with the positive electrode of a second Schottky diode D12, and the inverting input end of the operational amplifier U12 is grounded;
the output end of the operational amplifier U12 is connected with the control module, and the power supply end of the operational amplifier U12 is connected with the VCC end of the control module.
7. The low power consumption single hot wire switching dimmer of claim 6, wherein: the bidirectional thyristor drive circuit is respectively connected with two or more alternating current zero-crossing detection circuits, and the zero-crossing signal end of the two or more alternating current zero-crossing detection circuits is connected with the control module.
8. The low-power consumption single-live wire switching dimmer according to any one of claims 1-7, wherein the AC-DC power supply circuit comprises an AC-DC voltage conversion circuit, a capacitor C5, a capacitor C6, an inductor L1, a resistor R20 and a rectifying circuit, the AC-DC voltage conversion circuit is connected with one end of the inductor L1, one end of the resistor R20 and the anode of the capacitor C6, the other end of the resistor R20 is connected with the anode of the capacitor C5, the other end of the inductor L1 and the rectifying circuit, the cathode of the capacitor C5 and the cathode of the capacitor C6 are grounded;
the AC-DC voltage conversion circuit is connected with the VDD end of the control module.
9. The low power consumption single hot wire switching dimmer of claim 8, wherein: the rectifier circuit is connected to the load through a fuse F1.
10. The low power consumption single fire wire switching dimmer according to claim 9, wherein the AC-DC voltage converting circuit is a BUCK, Flyback, L DO or RCC voltage converting circuit.
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| CN201922222088.2U CN211184370U (en) | 2019-12-12 | 2019-12-12 | Low-power consumption single live wire switch light modulator |
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| CN201922222088.2U CN211184370U (en) | 2019-12-12 | 2019-12-12 | Low-power consumption single live wire switch light modulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112423439A (en) * | 2020-10-23 | 2021-02-26 | 陈劲游 | Prevent dodging wall switch circuit that single fire was got electricity |
| CN114449718A (en) * | 2022-01-29 | 2022-05-06 | 深圳市特赛莱通用技术有限公司 | Single live wire dimmer circuit topology and single live wire intelligent dimmer |
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2019
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Cited By (4)
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| CN112423439A (en) * | 2020-10-23 | 2021-02-26 | 陈劲游 | Prevent dodging wall switch circuit that single fire was got electricity |
| CN112423439B (en) * | 2020-10-23 | 2024-06-11 | 陈劲游 | Anti-flashover single-fire wall switch circuit |
| CN114449718A (en) * | 2022-01-29 | 2022-05-06 | 深圳市特赛莱通用技术有限公司 | Single live wire dimmer circuit topology and single live wire intelligent dimmer |
| CN114449718B (en) * | 2022-01-29 | 2022-11-29 | 深圳市特赛莱通用技术有限公司 | Single live wire dimmer circuit topology and single live wire intelligent dimmer |
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