阅读说明：本技术 一种单火线开关及单火线开关的控制器供电方法 (Single-live-wire switch and controller power supply method of single-live-wire switch ) 是由 尚龙 陈道远 骆志平 李宇飞 李新壮 于 2019-10-14 设计创作，主要内容包括：本发明公开了一种单火线开关及单火线开关的控制器供电方法,涉及智能开关技术领域,该单火线开关包括：继电器,其连接在火线与负载之间；控制器,其与所述继电器连接,用于输出第一控制信号,以控制所述继电器的开合状态,从而控制所述负载与所述火线的连接的通断；闭态取电电路,其连接在所述火线与所述控制器之间,用于根据所述控制器输出的第二控制信号在所述火线上建立电势差,并在所述负载与所述火线的连接连通时利用所述电势差为所述控制器供电。本发明的有益效果是：不仅能够在火线处于等电位的情况下进行单火线取电,以维持单火线开关的工作,而且不会影响到负载的正常工作。(The invention discloses a single live wire switch and a power supply method for a controller of the single live wire switch, which relate to the technical field of intelligent switches, wherein the single live wire switch comprises the following components: a relay connected between the live line and the load; the controller is connected with the relay and used for outputting a first control signal so as to control the opening and closing state of the relay and further control the connection and disconnection of the load and the live wire; and the closed-state electricity taking circuit is connected between the live wire and the controller and used for establishing a potential difference on the live wire according to a second control signal output by the controller and supplying power to the controller by utilizing the potential difference when the load is communicated with the live wire. The invention has the beneficial effects that: not only can carry out single live wire and get the electricity under the condition that the live wire is in the equipotential to the work of maintaining single live wire switch can not influence the normal work of load moreover.)

1. A single fire wire switch, comprising:

a relay connected between the live line and the load;

the controller is connected with the relay and used for outputting a first control signal so as to control the opening and closing state of the relay and further control the connection and disconnection of the load and the live wire;

and the closed-state electricity taking circuit is connected between the live wire and the controller and used for establishing a potential difference on the live wire according to a second control signal output by the controller and supplying power to the controller by utilizing the potential difference when the load is communicated with the live wire.

2. The single hot wire switch of claim 1, wherein the off-state power taking circuit comprises:

the power taking unit is connected with the live wire and the controller and used for establishing potential difference on the live wire according to a second control signal output by the controller;

and the power supply unit is connected with the power taking unit and the controller and is used for supplying power to the controller by utilizing the potential difference established by the power taking unit when the load is communicated with the live wire.

3. The single live wire switch of claim 2, wherein the power take unit comprises:

the drain electrode of the field effect transistor is connected with the input end of the live wire, the source electrode of the field effect transistor is connected with the input end of the live wire of the relay, and the grid electrode of the field effect transistor is connected with the signal output end of the controller so as to receive a second control signal output by the controller; wherein the second control signal is arranged such that the voltages across the fet and the relay can form a periodic cut-off angle.

4. The single hot wire switch of claim 3, wherein the second control signal comprises a PWM signal.

5. The single fire line switch of claim 3 wherein the FET comprises an N-channel FET.

6. Single live wire switch according to any one of claims 3 to 5, characterized in that said power supply unit comprises:

the first end of the capacitor is connected with the input end of the live wire, the second end of the capacitor is connected with the live wire output end of the relay, and the first end and the second end of the capacitor are respectively connected with the power supply end of the controller to supply power to the controller.

7. Single live wire switch according to any one of claims 3 to 5, characterized in that said power supply unit comprises:

the first end of the capacitor is connected with the input end of the live wire, and the second end of the capacitor is connected with the live wire output end of the relay;

and the first input end and the second input end of the voltage stabilizer are respectively connected with the first end and the second end of the capacitor, and the output end of the voltage stabilizer is connected with the power supply end of the controller.

8. Single live wire switch according to any one of claims 3 to 5, characterized in that said power supply unit comprises:

the anode of the freewheeling diode is connected with the input end of the live wire;

a first end of the capacitor is connected with a cathode of the freewheeling diode, and a second end of the capacitor is connected with a live wire output end of the relay;

and the first input end and the second input end of the voltage stabilizer are respectively connected with the first end and the second end of the capacitor, and the output end of the voltage stabilizer is connected with the power supply end of the controller.

9. A method for powering a controller of a single live wire switch, the method being applied to the single live wire switch according to any one of claims 1 to 8, the method comprising:

outputting a first control signal by using the controller to control the opening and closing state of the relay so as to control the connection and disconnection of the load and the live wire;

and establishing a potential difference on the live wire by using the closed-state power taking circuit according to a second control signal output by the controller, and supplying power to the controller by using the potential difference when the load is communicated with the live wire.

10. The method of claim 9, wherein the second control signal comprises a PWM signal.

Technical Field

The invention belongs to the technical field of intelligent switches, and particularly relates to a single live wire switch and a controller power supply method of the single live wire switch.

Background

With the constant popularization of smart homes, more and more families begin to use smart panel switches. At present, there are two kinds of intelligent panel switches, zero live wire panel switch and single live wire panel switch on the market. The zero-live wire panel switch is powered by two wires, namely a zero wire and a live wire, and the single-live wire panel switch is powered on the live wire. However, to use the zero-fire panel switch requires rewiring, which is time consuming, labor consuming and costly, so that most people use a single-fire panel switch to directly replace the old panel switch. However, under the condition that the intelligent panel switch only has a live wire, how to get power to supply the intelligent panel switch to normally work without influencing the power supply of the load becomes one of the difficulties in the development of the intelligent panel switch.

Disclosure of Invention

The invention provides a single live wire switch and a controller power supply method of the single live wire switch, which can take power from a single live wire to supply power to the single live wire switch under the condition that the single live wire is equipotential.

In a first aspect, an embodiment of the present invention provides a single live wire switch, including:

a relay connected between the live line and the load;

the controller is connected with the relay and used for outputting a first control signal so as to control the opening and closing state of the relay and further control the connection and disconnection of the load and the live wire;

and the closed-state electricity taking circuit is connected between the live wire and the controller and used for establishing a potential difference on the live wire according to a second control signal output by the controller and supplying power to the controller by utilizing the potential difference when the load is communicated with the live wire.

Further, the off-state power taking circuit includes:

the power taking unit is connected with the live wire and the controller and used for establishing potential difference on the live wire according to a second control signal output by the controller;

and the power supply unit is connected with the power taking unit and the controller and is used for supplying power to the controller by utilizing the potential difference established by the power taking unit when the load is communicated with the live wire.

Further, get the electric unit and include:

the drain electrode of the field effect transistor is connected with the input end of the live wire, the source electrode of the field effect transistor is connected with the input end of the live wire of the relay, and the grid electrode of the field effect transistor is connected with the signal output end of the controller so as to receive a second control signal output by the controller; wherein the second control signal is arranged such that the voltages across the fet and the relay form a periodic cut-off angle.

Further, the second control signal comprises a PWM signal.

Further, the field effect transistor includes an N-channel type field effect transistor.

According to one embodiment of the present invention, the power supply unit includes:

the first end of the capacitor is connected with the input end of the live wire, the second end of the capacitor is connected with the live wire output end of the relay, and the first end and the second end of the capacitor are respectively connected with the power supply end of the controller to supply power to the controller.

According to another embodiment of the present invention, the power supply unit includes:

the first end of the capacitor is connected with the input end of the live wire, and the second end of the capacitor is connected with the live wire output end of the relay;

and the first input end and the second input end of the voltage stabilizer are respectively connected with the first end and the second end of the capacitor, and the output end of the voltage stabilizer is connected with the power supply end of the controller.

According to still another embodiment of the present invention, the power supply unit includes:

the anode of the freewheeling diode is connected with the input end of the live wire;

a first end of the capacitor is connected with a cathode of the freewheeling diode, and a second end of the capacitor is connected with a live wire output end of the relay;

and the first input end and the second input end of the voltage stabilizer are respectively connected with the first end and the second end of the capacitor, and the output end of the voltage stabilizer is connected with the power supply end of the controller.

In a second aspect, an embodiment of the present invention further provides a method for supplying power to a controller of a single live wire switch, where the method applies the above-mentioned single live wire switch, and the method includes:

outputting a first control signal by using the controller to control the opening and closing state of the relay so as to control the connection and disconnection of the load and the live wire;

and establishing a potential difference on the live wire by using the closed-state power taking circuit according to a second control signal output by the controller, and supplying power to the controller by using the potential difference when the load is communicated with the live wire.

Further, the second control signal comprises a PWM signal.

According to the single live wire switch and the power supply method for the controller of the single live wire switch, provided by the embodiment of the invention, through the closed-state power taking circuit, when the load is connected with the live wire in a communication mode, a potential difference is established on the live wire according to a second control signal output by the controller, so that the controller is powered by utilizing the potential difference. Therefore, the single-live-wire switch and the power supply method for the controller of the single-live-wire switch provided by the embodiment of the invention can be used for taking power from the single live wire under the condition that the live wire is at the equipotential so as to maintain the operation of the single-live-wire switch, and the normal operation of a load cannot be influenced.

Drawings

The scope of the present disclosure may be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. Wherein the included drawings are:

fig. 1 is a schematic diagram illustrating a single live wire switch according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the off-state power-taking circuit of the proposed single-hot switch shown in FIG. 1;

FIG. 3 is a schematic diagram of a power-taking unit of the closed power-taking circuit shown in FIG. 2;

FIG. 4 is a schematic diagram of a power supply unit of the off-state power-on circuit shown in FIG. 3;

FIG. 5 is a schematic diagram of another power supply unit of the off-state power-on circuit shown in FIG. 3;

FIG. 6 is a schematic diagram of another configuration of a power supply unit of the off-state power-on circuit of FIG. 3;

fig. 7 is a schematic diagram illustrating the operation of the off-state power-taking circuit in the single hot switch shown in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe in detail an implementation method of the present invention with reference to the accompanying drawings and embodiments, so that how to apply technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.