CN110676119B - Single-live-wire switch and controller power supply method of single-live-wire switch - Google Patents
Single-live-wire switch and controller power supply method of single-live-wire switch Download PDFInfo
- Publication number
- CN110676119B CN110676119B CN201910974849.1A CN201910974849A CN110676119B CN 110676119 B CN110676119 B CN 110676119B CN 201910974849 A CN201910974849 A CN 201910974849A CN 110676119 B CN110676119 B CN 110676119B
- Authority
- CN
- China
- Prior art keywords
- live wire
- controller
- relay
- capacitor
- control signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 41
- 239000003381 stabilizer Substances 0.000 claims description 20
- 230000005669 field effect Effects 0.000 claims description 19
- 230000000737 periodic effect Effects 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 230000003071 parasitic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
Landscapes
- Electronic Switches (AREA)
Abstract
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.
Description
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.
Example one
According to an embodiment of the present invention, a single live wire switch is provided, and fig. 1 shows a schematic structural diagram of a single live wire switch according to an embodiment of the present invention, as shown in fig. 1, a single live wire switch includes:
a relay 10 connected between a live line and a load;
the controller 20 is connected with the relay 10 and is used for outputting a first control signal so as to control the opening and closing state of the relay 10 and further control the connection of the load and the live wire to be switched on and off;
and the closed-state power taking circuit 30 is connected between the live wire and the controller 20, and is used for establishing a potential difference on the live wire according to a second control signal output by the controller 20 and supplying power to the controller 20 by using the potential difference when the load is connected with the live wire.
Here, the load is connected between the live wire and the zero wire, and the relay 10 is connected between the connecting wires of the live wire and the load and used for controlling the connection and disconnection of the live wire and the load; the signal output end of the controller 20 is connected with the signal input end of the relay 10 to control the opening and closing of the relay 10, and further the on-off of the connection between the load and the live wire is controlled through the opening and closing of the relay 10.
When the relay 10 is in a closed state, that is, when the load connection live wire is in an operating state, the potentials on the live wires are equal. Because there is no potential difference, it can't get electricity directly on the live wire, to supply power for single live wire switch. By means of the off-state power taking circuit 30, when the relay 10 is in the closed state, a potential difference is established over the live wire, so that the controller 20 is powered by the potential difference, so that the operation of the single live wire switch is not affected.
In this embodiment, by the off-state power-taking circuit 30, the power can be taken from a single live wire when the live wire is at the equipotential, so as to take power from the live wire to power the controller 20. 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.
Fig. 2 is a schematic diagram illustrating a composition of an off-state power-taking circuit of a single-hot-line switch according to a second embodiment of the present invention. As shown in fig. 2, the off-state current-taking circuit 30 includes:
the power taking unit 301 is connected with the live wire and the controller 20, and is used for establishing a potential difference on the live wire according to a second control signal output by the controller 20;
and the power supply unit 302 is connected with the power taking unit 301 and the controller 20, and is used for supplying power to the controller 20 by using the potential difference established by the power taking unit 301 when the load is communicated with the live wire.
Here, the power taking unit 301 establishes a potential difference on the live wire after receiving the second control signal output by the controller 20. Under the condition that the live wire is at the equipotential, the potential difference for taking electricity can be established on the live wire through the electricity taking unit 301. Then, the power supply unit 302 supplies power to the controller 20 by using the potential difference established by the power taking unit 301, so that the single live wire switch can take power under the condition that the live wires are equipotential.
Fig. 3 is a schematic diagram of a power-taking unit of the off-state power-taking circuit shown in fig. 2. As shown in fig. 3, the power taking unit 301 may include:
a drain electrode of the field effect transistor Q is connected with the input end of the live wire, a source electrode of the field effect transistor Q is connected with the input end of the live wire of the relay 10, and a gate electrode of the field effect transistor Q is connected with the signal output end of the controller 20 so as to receive a second control signal output by the controller 20; wherein the second control signal is set such that the voltages across the fet Q and the relay 10 form a periodic cut-off angle.
Here, after the gate of the fet Q receives the second control signal output by the controller 20, the fet Q is turned on, so that the voltages at the two ends of the fet Q and the relay 10 can form a periodic cut-off angle, thereby establishing a potential difference. Namely, the field effect transistor Q is conducted according to the second control signal, and a periodic cut-off angle is formed through the parasitic diode D in the field effect transistor Q, so that a potential difference is generated.
It should be noted that the second control signal may be a PWM signal, that is, the signal output end of the controller 20 outputs the PWM signal, and then the on/off of the field effect transistor Q is controlled by the PWM signal. Wherein, the field effect transistor Q may be an N-channel type field effect transistor Q.
Fig. 4 is a schematic diagram of a power supply unit of the off-state power-taking circuit shown in fig. 3. In an alternative embodiment, as shown in fig. 4, the power supply unit 302 includes:
and a capacitor C, wherein a first end of the capacitor C is connected with the input end of the live wire, a second end of the capacitor C is connected with the live wire output end of the relay 10, and the first end and the second end of the capacitor C are respectively connected with the power supply end of the controller 20 so as to supply power to the controller 20.
Here, the first end of the capacitor C is connected to the input end of the live wire, and the second end of the capacitor C is connected to the live wire output end of the relay 10, so that after the power taking unit 301 establishes a potential difference on the live wire, the capacitor C can be powered on, and then the controller 20 is powered through the capacitor C.
Fig. 5 is a schematic diagram of another structure of the power supply unit of the off-state power-taking circuit shown in fig. 3. In another embodiment, as shown in fig. 5, the power supply unit 302 may include:
a first end of the capacitor C is connected with the input end of the live wire, and a second end of the capacitor C is connected with the live wire output end of the relay 10;
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 C, and the output end of the voltage stabilizer is connected with the power supply end of the controller 20.
Here, the first end of the capacitor C is connected to the input end of the live wire, and the second end of the capacitor C is connected to the live wire output end of the relay 10, so that after the power taking unit 301 establishes a potential difference on the live wire, the capacitor C can be powered on, and then the controller 20 is powered through the voltage stabilizer.
Here, since the controller 20 has an operating voltage, it is usually 12V dc voltage. The voltage input to the controller 20 is controlled by the voltage regulator, so that the voltage output by the capacitor C can be stably maintained at the operating voltage of the controller 20, and the controller 20 can maintain stable operation. Wherein, the output voltage of the voltage stabilizer is set according to the actual condition.
Fig. 6 is a schematic diagram of another structure of the power supply unit of the off-state power-taking circuit shown in fig. 3. In another embodiment, as shown in fig. 6, the power supply unit 302 may include:
a freewheeling diode D, the anode of which is connected with the input end of the live wire;
a first end of the capacitor C is connected with a cathode of the freewheeling diode D, and a second end of the capacitor C is connected with a live wire output end of the relay 10;
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 C, and the output end of the voltage stabilizer is connected with the power supply end of the controller 20.
Here, the first end of the capacitor C is connected to the input end of the live wire, and the second end of the capacitor C is connected to the live wire output end of the relay 10, so that after the power taking unit 301 establishes a potential difference on the live wire, the capacitor C can be powered on, and then the controller 20 is powered through the voltage stabilizer.
Since the controller 20 has an operating voltage, it is usually 12V dc. The voltage input to the controller 20 is controlled by the voltage regulator, so that the voltage output by the capacitor C can be stably maintained at the operating voltage of the controller 20, and the controller 20 can maintain stable operation. Wherein, the output voltage of the voltage stabilizer is set according to the actual condition.
The freewheeling diode D acts as a freewheeling in the circuit configuration. When the power is off, a loop can be formed among the field effect transistor Q, the relay 10 and the voltage stabilizer, so that the energy stored by the coil in the relay 10 can be safely discharged, and the circuit structure is not damaged.
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. Referring to fig. 4, the circuit structure of the above embodiment is further described, as shown in fig. 4, when the fet Q is turned on in the positive half axis of the waveform 1 between the live line and the neutral line, the current waveform of the fet Q is as the waveform 4, so that the voltages at the two ends of the fet Q and the relay 10 form a periodic cut-off angle, which is as the waveform 2 between the relay 10 and the fet Q; on the negative half axis of the waveform 1 between the live line and the zero line, the current passes through a parasitic diode D in the field effect transistor Q, and the process of the parasitic diode D is as the waveform 5'; under the action of the freewheeling diode D, a loop is formed among the field effect transistor Q, the relay 10 and the voltage stabilizer, an alternating current waveform is filtered out by the capacitor C, the alternating current process is like a waveform 3, then the voltage stabilizer is supplied with power, and the voltage stabilizer supplies power to the controller 20.
Example two
According to an embodiment of the present invention, there is also provided a method for supplying power to a controller of a single live wire switch, the method being applied to the single live wire switch according to any one of the above embodiments, and the method including:
the controller 20 is used for outputting a first control signal to control the opening and closing state of the relay 10, so that the connection between the load and the live wire is controlled to be switched on and off;
and establishing a potential difference on the live wire by using the closed-state power taking circuit 30 according to a second control signal output by the controller 20, and supplying power to the controller 20 by using the potential difference when the connection between the load and the live wire is connected.
Here, the controller 20 receives a trigger signal for controlling the relay 10 of the single live wire switch to switch the live wire to the load. The controller 20 outputs a first control signal to control the on/off state of the relay 10, thereby controlling the on/off of the connection between the load and the live wire.
And outputting a second control signal at the controller 20 to control the off-state power taking circuit 30 of the single live wire switch to obtain the potential difference on the live wire according to the second control signal, and supplying power to the controller 20 by using the potential difference.
In an alternative embodiment, the second control signal output by the controller 20 may be a PWM signal. The controller 20 outputs the PWM signal, and the off-state power taking circuit 30 establishes a potential difference on the live wire after receiving the PWM signal, so as to supply power to the controller 20 according to the potential difference.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
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;
the closed-state electricity taking circuit is connected between 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 supplying power to the controller by utilizing the potential difference when the load is communicated with the live wire;
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;
the power supply unit is connected with the power taking unit and the controller and 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;
the electricity taking 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.
2. The single hot wire switch of claim 1, wherein the second control signal comprises a PWM signal.
3. The single fire line switch of claim 1, wherein the fet comprises an N-channel fet.
4. Single live wire switch according to any one of claims 1 to 3, 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.
5. Single live wire switch according to any one of claims 1 to 3, 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.
6. Single live wire switch according to any one of claims 1 to 3, 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.
7. 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 6, 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.
8. The method of claim 7, wherein the second control signal comprises a PWM signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910974849.1A CN110676119B (en) | 2019-10-14 | 2019-10-14 | Single-live-wire switch and controller power supply method of single-live-wire switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910974849.1A CN110676119B (en) | 2019-10-14 | 2019-10-14 | Single-live-wire switch and controller power supply method of single-live-wire switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110676119A CN110676119A (en) | 2020-01-10 |
| CN110676119B true CN110676119B (en) | 2020-10-02 |
Family
ID=69082149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910974849.1A Active CN110676119B (en) | 2019-10-14 | 2019-10-14 | Single-live-wire switch and controller power supply method of single-live-wire switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110676119B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202261205U (en) * | 2011-09-22 | 2012-05-30 | 杭州坤森科技有限公司 | Single-live-wire double-control switch |
| CN207644315U (en) * | 2017-12-25 | 2018-07-24 | 长城汽车股份有限公司 | A kind of horn circuit |
| CN208590139U (en) * | 2018-06-26 | 2019-03-08 | 恒大智慧科技有限公司 | Single fire takes electric intelligent switch |
| CN209119877U (en) * | 2018-10-26 | 2019-07-16 | 杰华特微电子（杭州）有限公司 | A kind of list firewire power supply circuit |
| CN110225623A (en) * | 2019-06-25 | 2019-09-10 | 珠海格力电器股份有限公司 | Panel switch, load circuit system and control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9236765B2 (en) * | 2009-07-27 | 2016-01-12 | Live-FX, LLC | Universal control system with universal interface to operate a plurality of devices |
-
2019
- 2019-10-14 CN CN201910974849.1A patent/CN110676119B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202261205U (en) * | 2011-09-22 | 2012-05-30 | 杭州坤森科技有限公司 | Single-live-wire double-control switch |
| CN207644315U (en) * | 2017-12-25 | 2018-07-24 | 长城汽车股份有限公司 | A kind of horn circuit |
| CN208590139U (en) * | 2018-06-26 | 2019-03-08 | 恒大智慧科技有限公司 | Single fire takes electric intelligent switch |
| CN209119877U (en) * | 2018-10-26 | 2019-07-16 | 杰华特微电子（杭州）有限公司 | A kind of list firewire power supply circuit |
| CN110225623A (en) * | 2019-06-25 | 2019-09-10 | 珠海格力电器股份有限公司 | Panel switch, load circuit system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110676119A (en) | 2020-01-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101219119B1 (en) | Device, system and method for coupling multiple photovolatic arrays | |
| CN105391281A (en) | System and method for a switch having a normally-on transistor and a normally-off transistor | |
| CN103210563A (en) | Electronic control device and method for reducing stand-by state energy consumption of an electric household appliance | |
| EP2639917B1 (en) | Dc power supply apparatus | |
| KR20180056175A (en) | Power relay assembly for electric vehicle and driving method thereof | |
| KR101417492B1 (en) | Uninterruptible powerr supply connected to power system and control method thereof | |
| CN107706906A (en) | Anti-back flow circuit and power supply redundancy circuit | |
| CN108683217B (en) | Power supply voltage monitoring circuit capable of being turned off | |
| CN110676119B (en) | Single-live-wire switch and controller power supply method of single-live-wire switch | |
| CN105634108B (en) | Off-line uninterrupted power supply | |
| CN212992184U (en) | Power supply circuit and composite robot | |
| CN109130858B (en) | Direct current/direct current converter starting control circuit of electric automobile and automobile | |
| US10958150B2 (en) | Electronic power supply circuit | |
| US11894773B2 (en) | Buck-boost circuit and control method therefor | |
| CN218216735U (en) | Power supply circuit | |
| CN214378231U (en) | Relay drive circuit and relay system of grid-connected inverter | |
| CN107768196A (en) | A kind of control system for reducing relay power consumption | |
| WO2021033630A1 (en) | Switch device | |
| CN104679214A (en) | Voltage regulating circuit | |
| KR102159264B1 (en) | Control system to control DC-DC voltage converter circuit | |
| US8395911B2 (en) | Circuit configuration for operating a household appliance | |
| KR101228425B1 (en) | Power supply circuit for light sources, such as lighting led systems | |
| CN217159673U (en) | A get electric circuit and single live wire switch for single live wire | |
| CN109874201A (en) | A kind of two line lighting control systems | |
| CN219202167U (en) | Intelligent switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |