CN215817960U - Single-fire zero-fire common-board circuit and intelligent equipment - Google Patents
Single-fire zero-fire common-board circuit and intelligent equipment Download PDFInfo
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- CN215817960U CN215817960U CN202121392930.8U CN202121392930U CN215817960U CN 215817960 U CN215817960 U CN 215817960U CN 202121392930 U CN202121392930 U CN 202121392930U CN 215817960 U CN215817960 U CN 215817960U
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Abstract
The utility model discloses a single-live-zero-live common-board circuit and intelligent equipment, wherein the single-live-zero-live common-board circuit comprises: the switching power supply circuit is used for sequentially rectifying and transforming the input alternating current power supply and then outputting the direct current power supply to the intelligent control circuit and the operational amplifier control circuit; the intelligent control circuit is used for receiving the work of the direct-current power supply so as to control the opening of the relay switch circuit; the operational amplifier control circuit is used for receiving the direct-current power supply to work so as to control the opening of the MOS tube switching circuit; when the MOS tube switching circuit and the relay switching circuit are both opened, controlling the load to be electrified, and controlling the MOS tube conduction power-taking circuit to work and output a direct-current power supply under the condition of only connecting a live wire so as to maintain the intelligent control circuit and the operational amplifier control circuit to work; the single-live and zero-live shared-plate circuit can reduce the power consumption in a zero-live state.
Description
Technical Field
The utility model relates to the field of intelligent switches, in particular to a single-live-zero-live common-board circuit and intelligent equipment.
Background
With the high-speed development of the internet of things, smart home products enter thousands of households, at present, a considerable part of the smart home products are intelligently controlled by supplying power through a single live wire, the intelligent control is mainly determined by the wiring layout of a house, and the wiring mode is mainly because a zero line is not needed by a previous mechanical switch.
However, many newly-built houses are all wire layouts of live wire, and in order to enable a product to meet different power supply modes, the market has the requirement of single live wire and live wire sharing.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a single-live-line and zero-fire common-board circuit and intelligent equipment, and aims to solve the problem that a live line and a single-live line are common-board.
In order to achieve the above object, the present invention provides a single hot and zero hot common board circuit, which includes:
a live wire connecting end and a zero line connecting end;
the switch power supply circuit is provided with a positive input end, a negative input end, a positive output end and a negative output end; the positive input end is connected with the live wire connecting end, the negative input end is used for connecting a load, and the negative output end is grounded and connected with the zero line connecting end;
the switching circuit comprises an MOS tube switching circuit and a relay switching circuit, wherein the MOS tube switching circuit and the relay switching circuit are used for being connected between a live wire and a load in series;
the intelligent control circuit is used for controlling the on and off of the relay switch circuit so as to communicate a live wire and a load;
the input end of the MOS tube conduction power circuit is connected with the live wire connecting end, and the output end of the MOS tube conduction power circuit is connected with the input end of the intelligent control circuit; and
the operational amplifier control circuit is provided with a first signal input end, a second signal input end and a signal output end, and the first signal input end is connected with the positive output end of the switch power supply circuit; the second signal input end is connected with the output end of the MOS tube conduction electric circuit; the signal output end is connected with the MOS tube switch circuit;
when the live wire connecting end is connected with a live wire and the zero line connecting end is connected with a zero line, the switch power supply circuit is used for sequentially rectifying and transforming an input alternating current power supply into a direct current power supply and outputting the direct current power supply to the intelligent control circuit and the operational amplifier control circuit, and the intelligent control circuit is used for receiving the direct current power supply to work so as to control the relay switch circuit to be started; the operational amplifier control circuit is used for receiving the work of the direct-current power supply to control the opening of an MOS tube switching circuit, and when the MOS tube switching circuit and the relay switching circuit are both opened, the load is controlled to be electrified;
only when the live wire connecting end is connected with the live wire, the switch power supply circuit is used for forming a loop through a connected load so as to output a direct current power supply to the intelligent control circuit and the operational amplifier control circuit after sequentially rectifying and transforming the input alternating current power supply, and the intelligent control circuit is used for receiving the direct current power supply to work so as to control the relay switch circuit to be started; the operational amplifier control circuit is used for receiving the work of the direct-current power supply to control the opening of an MOS tube switching circuit, and when the MOS tube switching circuit and the relay switching circuit are both opened, the operational amplifier control circuit controls the electrification of a load, controls the conduction and electricity taking circuit of the MOS tube to work and outputs the direct-current power supply so as to maintain the work of the intelligent control circuit and the operational amplifier control circuit; and after the load is electrified, the power-taking circuit of the switching power supply is bypassed.
Preferably, the switch power supply circuit includes: the first diode, the bridge stack and the transformer conversion circuit; the positive input end of the bridge stack is connected with the live wire connecting end, the negative input end of the bridge stack is connected with a load, the positive output end of the bridge stack is connected with the input end of the transformer conversion circuit, the negative output end of the bridge stack is grounded, the anode of the first diode is connected with the negative output end of the bridge stack, the cathode of the first diode is connected with the zero line connecting end, and the output end of the transformer conversion circuit is connected with the input ends of the intelligent control circuit and the operational amplifier control circuit;
the bridge rectifier is used for rectifying an input alternating current power supply and outputting the rectified alternating current power supply to the transformer conversion circuit when the live wire connecting end is connected with a live wire and the zero line connecting end is connected with a zero line, and the transformer conversion circuit transforms the input alternating current power supply and outputs a direct current power supply to the intelligent control circuit and the operational amplifier control circuit;
only when the live wire connecting end is connected with a live wire, the bridge rectifier is used for forming a loop through a connected load so as to rectify and output an input alternating current power supply to the transformer conversion circuit, and the transformer conversion circuit transforms the input alternating current power supply and outputs a direct current power supply to the intelligent control circuit and the operational amplifier control circuit; and when the load is electrified, the live wire and the load form a loop to bypass the bridge stack.
Preferably, the intelligent control circuit includes:
the input end of the LDO voltage stabilizing circuit is connected with the output end of the transformer conversion circuit and used for converting the power supply voltage into a driving voltage;
the input end of the wireless intelligent module is connected with the output end of the LDO voltage stabilizing circuit, and the output end of the wireless intelligent module is connected with the first input end of the operational amplifier control circuit and used for controlling the relay switch circuit and the operational amplifier control circuit.
Preferably, the MOS transistor switching circuit includes: the transient diode circuit comprises a first transient diode, a second transient diode, a first MOS (metal oxide semiconductor) transistor, a second MOS transistor and a second resistor; the cathode of the first transient diode is connected with a live wire, the anode of the first transient diode is grounded, the anode of the second transient diode is connected with the anode of the first transient diode, the cathode of the second transient diode is connected with the input end of the MOS tube conduction power circuit, the drain of the first MOS tube is connected with the cathode of the first transient diode, the source of the first MOS tube is connected with the anode of the first transient diode, the gate of the first MOS tube is connected with the control end of the operational amplifier control circuit, the drain of the second MOS tube is connected with the cathode of the second transient diode, the source of the second MOS tube is connected with the anode of the second transient diode, the gate of the second MOS tube is connected with the gate of the first MOS tube, and the first end of the second resistor is connected with the anode of the first transient diode, and the second end of the second resistor is connected with the grid electrode of the second MOS tube.
Preferably, the MOS transistor conduction power circuit includes: a third transient diode, a second diode, a third diode, a fourth diode and a first capacitor; the positive pole of the second diode is connected with the output end of the MOS tube switch circuit, the negative pole of the second diode is connected with the positive pole of the fourth diode, the positive pole of the third diode is connected with the input end of the MOS tube switch circuit, the negative pole of the third diode is connected with the positive pole of the fourth diode, the negative pole of the fourth diode is connected with the first end of the first capacitor, the second end of the first capacitor is grounded, the negative pole of the third transient diode is connected with the first end of the first capacitor, and the positive pole of the third transient diode is connected with the second end of the first capacitor.
Preferably, the operational amplifier control circuit includes: the first operational amplifier, the second operational amplifier, the fourth transient diode, the third resistor to the seventh resistor, the second capacitor, the fifth diode to the seventh diode and the first triode; the cathode of the fourth transient diode is connected with the cathode of the second diode, the anode of the fourth transient diode is connected with the unidirectional input end of the first operational amplifier, the first end of the second capacitor is connected with the anode of the fourth transient diode, the second end of the second capacitor is grounded, the first end of the third resistor is connected with the anode of the fourth transient diode, the second end of the third resistor is grounded, the anode of the fifth diode is connected with the output end of the wireless intelligent module, the cathode of the fifth diode is connected with the reverse input end of the first operational amplifier through the fourth resistor, the collector of the first triode is connected with the reverse input end of the first operational amplifier through the fifth resistor, the emitter of the first triode is grounded, and the base of the first triode is connected with the output end of the first operational amplifier, the output end of the first operational amplifier is connected with the anode of the sixth diode, the cathode of the sixth diode is connected with the controlled end of the MOS tube switching circuit, the power supply end of the first operational amplifier is connected with the output end of the MOS tube conduction current-taking circuit, the grounding end of the first operational amplifier is grounded, the cathode of the fifth diode is connected with the same-direction input end of the second operational amplifier, the reverse input end of the second operational amplifier is connected with the output end of the LDO voltage stabilizing circuit through the sixth resistor, the reverse input end of the second operational amplifier is grounded through a seventh resistor, the output end of the second operational amplifier is connected with the anode of the seventh diode, the cathode of the seventh diode is connected with the controlled end of the MOS tube switching circuit, and the power supply end of the second operational amplifier is connected with the output end of the transformer conversion circuit, the grounding end of the second operational amplifier is grounded;
when the live wire connecting end is connected with a live wire and the zero line connecting end is connected with a zero line, the operational amplifier control circuit controls the first MOS tube and the second MOS tube to be continuously conducted through the output voltage of the second operational amplifier;
when the live wire connecting end is connected with a live wire, the operational amplifier control circuit controls the first MOS tube and the second MOS tube to be continuously conducted through the output voltage of the second operational amplifier; when the load is powered on, the first MOS tube and the second MOS tube are controlled to be periodically conducted by the output voltage of the first operational amplifier.
Preferably, the relay switch circuit includes: the relay, a ninth resistor, a tenth resistor, a second triode and an eighth diode; the base of the second triode is connected with the output end of the wireless intelligent module through a ninth resistor, the first end of the tenth resistor is connected with the base of the second triode, the second end of the tenth resistor is connected with the emitter of the second triode, the emitter of the second triode is grounded, the collector of the second triode is connected with the second end of the relay, the anode of the eighth diode is connected with the second end of the relay, the cathode of the eighth diode is connected with the first end of the relay, the first end of the relay is connected with the output end of the transformer conversion circuit, the first end of the relay is further connected with the output end of the MOS tube conduction and power taking circuit, the third end of the relay is connected with a load, and the fourth end of the relay is connected with the output end of the MOS tube switching circuit;
when the relay is opened, the third end of the relay is communicated with the fourth end of the relay, and at the moment, the live wire supplies power to the load through the first MOS tube, the second MOS tube and the relay.
Preferably, the input end of the LDO voltage stabilizing circuit is further connected to the output end of the MOS transistor conduction current-taking circuit; the driving voltage output by the LDO voltage stabilizing circuit is 3.3V and is used for providing 3.3V driving voltage for the intelligent wireless module and the operational amplifier control circuit.
Preferably, the wireless smart module includes: the control chip, the eighth resistor and the light emitting diode; the anode of the light emitting diode is connected with the output end of the LDO voltage stabilizing circuit through an eighth resistor, the cathode of the light emitting diode is connected with the input end of the control chip, and the output end of the control chip is connected with the operational amplifier control circuit.
The utility model also provides intelligent equipment which comprises the single-fire and zero-fire common-board circuit.
According to the technical scheme, an input alternating current power supply is sequentially rectified and transformed through a switch power supply circuit, and then a direct current power supply is output to an intelligent control circuit and an operational amplifier control circuit, the intelligent control circuit controls a relay switch circuit to be started after receiving the direct current power supply, the operational amplifier control circuit controls an MOS tube switch circuit to be started after receiving the work of the direct current power supply, when the MOS tube switch circuit and the relay switch circuit are both started, a load is controlled to be electrified, and the MOS tube conduction power supply circuit is controlled to work and output the direct current power supply under the condition that only a live wire is connected, so that the intelligent control circuit and the operational amplifier control circuit are maintained to work; the utility model automatically identifies the type of the access line through the operational amplifier control circuit and adopts different modes to communicate the live wire to supply power for the load, thereby not only solving the problem that the zero live wire and the single live wire share the same board, but also reducing the power consumption of the product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a circuit module of an embodiment of a single-hot and zero-hot common board circuit of the present invention;
FIG. 2 is a flow chart of the operation of an embodiment of the single-fire and zero-fire common board circuit in the zero-fire state of the present invention;
FIG. 3 is a flow chart of the operation of an embodiment of the single fire and zero fire common board circuit of the present invention under a single fire condition;
FIG. 4 is a schematic circuit diagram of an embodiment of a power-taking circuit of a switching power supply in a single-hot and zero-hot co-plate circuit according to the present invention;
FIG. 5 is a schematic circuit diagram of an embodiment of a MOS transistor switching circuit and a MOS transistor conduction circuit in a single-fire zero-fire common board circuit according to the present invention;
FIG. 6 is a schematic diagram of a circuit structure of an operational amplifier control circuit in a single-fire and zero-fire common-board circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a circuit structure of an embodiment of a wireless intelligent module in a single-fire and zero-fire common-board circuit according to the present invention;
FIG. 8 is a schematic diagram of a circuit structure of an embodiment of a relay driving circuit of a single-hot and zero-hot co-plate circuit according to the present invention;
the reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a single-live-zero-live common-board circuit.
At present, a considerable part of products in smart home are intelligently controlled by supplying power through a single live wire, which is mainly determined by the wiring layout of a house, and the wiring mode is mainly because a zero line is not required by a previous mechanical switch.
However, many newly-built houses are all wire layouts of live wire, and in order to enable a product to meet different power supply modes, the market has the requirement of single live wire and live wire sharing.
To solve the above problem, referring to fig. 1 to 8, in an embodiment of the present invention, the single hot and zero hot common board circuit includes:
a live wire connection end 10 and a zero line connection end 20;
a switching power supply circuit 30 having a positive input terminal, a negative input terminal, a positive output terminal and a negative output terminal; the positive input end is connected with the live wire connecting end 10, the negative input end is used for connecting a load, and the negative output end is grounded and connected with the zero line connecting end 20;
the switching circuit comprises an MOS tube switching circuit 40 and a relay switching circuit 50, wherein the MOS tube switching circuit 40 and the relay switching circuit 50 are connected in series between a live wire and a load;
the intelligent control circuit 60 is characterized in that the input end of the intelligent control circuit 60 is connected with the positive output end of the switch power supply circuit 30, the output end of the intelligent control circuit 60 is connected with the controlled end of the relay switch circuit 50, and the intelligent control circuit 60 is used for controlling the on and off of the relay switch circuit 50 so as to communicate a live wire and a load;
the input end of the MOS transistor conduction power circuit 70 is connected with the live wire connecting end 10, and the output end of the MOS transistor conduction power circuit 70 is connected with the input end of the intelligent control circuit 60; and
an operational amplifier control circuit 80 having a first signal input terminal, a second signal input terminal and a signal output terminal, wherein the first signal input terminal is connected with the positive output terminal of the switching power supply circuit 30; the second signal input end is connected with the output end of the MOS transistor conducting and taking circuit 70; the signal output end is connected with the MOS tube switching circuit 40;
when the live wire connecting end 10 is connected with a live wire, and the zero line connecting end 20 is connected with a zero line, the switching power supply circuit 30 is used for sequentially rectifying and transforming an input alternating current power supply into a direct current power supply and outputting the direct current power supply to the intelligent control circuit 60 and the operational amplifier control circuit 80, and the intelligent control circuit 60 is used for receiving the direct current power supply to work so as to control the relay switching circuit 50 to be switched on; the operational amplifier control circuit 80 is used for receiving the work of the direct-current power supply to control the MOS tube switch circuit 40 to be started, and when the MOS tube switch circuit 40 and the relay switch 50 are both started, the load is controlled to be electrified;
only when the live wire connection end 10 is connected to a live wire, the switching power supply circuit 30 is configured to form a loop through a connected load, so as to output a dc power to the intelligent control circuit 60 and the operational amplifier control circuit 80 after sequentially rectifying and transforming an input ac power, where the intelligent control circuit 60 is configured to receive the dc power to operate, so as to control the relay switching circuit 50 to be turned on; the operational amplifier control circuit 80 is configured to receive the work of the direct-current power supply to control the MOS transistor switch circuit 40 to be turned on, and when the MOS transistor switch circuit 40 and the relay switch circuit 50 are both turned on, control the load to be powered on, control the MOS transistor conduction power-taking circuit 70 to work and output the direct-current power supply to maintain the work of the intelligent control circuit 60 and the operational amplifier control circuit 80; after the load is powered on, the switch power supply circuit 30 is bypassed.
In this embodiment, when the live wire connection end 10 is connected to the live wire, and the zero line connection end 20 is connected to the zero line, the switching power supply circuit 30 supplies power from the access circuit and outputs a direct current power supply to the intelligent control circuit 60 and the operational amplifier control circuit 80, when the intelligent control circuit 60 receives a start signal of a user, the output voltage controls the relay switch circuit 50 to be turned on, the operational amplifier control circuit 80 controls the MOS transistor switch circuit 40 to be continuously turned on, and when the MOS transistor switch circuit 40 and the relay switch circuit 50 are both turned on, the live wire supplies power to the load through the MOS transistor switch circuit 40 and the relay switch circuit 50;
when the live wire connection end 10 is connected with a live wire, the direct-current power supply is still output to the switching power supply circuit 30 for supplying power to the intelligent control circuit 60 and the operational amplifier control circuit 80 before the relay switch circuit 50 is not conducted, when the intelligent control circuit 60 receives a starting signal of a user, the output voltage controls the relay switch circuit 50 to be conducted, the live wire and the load form a current loop, the switching power supply circuit 30 is bypassed, namely the switching power supply circuit 30 stops working, at the moment, the MOS tube conduction circuit takes power from the live wire and outputs the supply voltage for supplying power to the intelligent control circuit 60 and the operational amplifier control circuit 80, and the operational amplifier control circuit 80 controls the MOS tube switch circuit 40 to be conducted periodically. Compare when the access line is single live wire with the access line, when the access line is zero live wire, fortune is put control circuit 40 and is controlled MOS pipe switching circuit 40 and continuously switches on, has reduced the switching loss of circuit, has not only solved the problem of zero live wire and single live wire sharing board, has still reduced the circuit loss under zero live state.
Referring to fig. 1 to 8, in an embodiment of the present invention, the switching power supply circuit 20 includes: a first diode D1, a bridge DB, and a transformer conversion circuit 31; the positive input end of the bridge pile DB is connected with the live wire connecting end 10, the negative input end of the bridge pile DB is connected with a load, the positive output end of the bridge pile DB is connected with the input end of the transformer conversion circuit 31, the negative output end of the bridge pile DB is grounded, the anode of the first diode D1 is connected with the negative output end of the bridge pile DB, the cathode of the first diode D1 is connected with the zero wire connecting end 20, and the output end of the transformer conversion circuit 31 is connected with the input ends of the intelligent control circuit 60 and the operational amplifier control circuit 80;
when the live wire connection end 10 is connected with a live wire and the null wire connection end 20 is connected with a null wire, the bridge rectifier DB is used for rectifying an input alternating current power supply and outputting the rectified alternating current power supply to the transformer conversion circuit 31, and the transformer conversion circuit 31 transforms the input alternating current power supply and outputs a direct current power supply to the intelligent control circuit 60 and the operational amplifier control circuit 80;
only when the live wire is connected to the live wire connection 10 end, the bridge rectifier DB is configured to form a loop through a connected load, so as to rectify and output an input ac power to the transformer conversion circuit 31, where the transformer conversion circuit 31 transforms the input ac power and outputs a dc power to the intelligent control circuit 60 and the operational amplifier control circuit 80; and when the load is electrified, the live wire and the load form a loop to bypass the bridge stack DB.
In this embodiment, when the access line is a zero-live line, a current loop is formed by the live line and a zero line, the voltage difference between the two ends of the bridge stack DB is large enough to provide the transformer conversion circuit 31 with the required working voltage for operation, and when the relay switch circuit 50 is turned on, the voltage difference between the two ends of the bridge stack DB does not change, so that when the access line is a zero-live line, the transformer conversion circuit 31 operates normally and outputs a supply voltage, and in this embodiment, the supply voltage output by the transformer conversion circuit 31 is 12V;
when the access line is a single live wire, a current loop is formed by an external load at this time, before the relay switch circuit 50 is not switched on, the voltage difference at the two ends of the bridge stack DB can still provide enough working voltage for the transformer conversion circuit 31 to work, after the relay switch circuit 50 is switched on, the live wire and the load form a current loop, the voltage difference at the two ends of the bridge stack DB becomes very small, at this time, the bridge stack DB cannot provide enough working voltage to supply power for the transformer conversion circuit 31, namely, the transformer conversion circuit 31 stops outputting the power supply voltage, at this time, the MOS transistor conduction power circuit 70 takes power from the live wire and outputs 12V power supply voltage.
Referring to fig. 1 to 8, in an embodiment of the present invention, the intelligent control circuit 60 includes:
the input end of the LDO voltage stabilizing circuit 61 is connected with the output end of the transformer conversion circuit 31 and is used for converting the power supply voltage into a driving voltage;
and the input end of the wireless intelligent module 62 is connected with the output end of the LDO voltage stabilizing circuit 61, and the output end of the wireless intelligent module 62 is connected with the first input end of the operational amplifier control circuit 80 and is used for controlling the relay switch circuit 50 and the operational amplifier control circuit 80.
In this embodiment, the LDO voltage regulator circuit 61 converts the power supply voltage output by the transformer converter circuit 31 and the MOS conduction current circuit 70 into a driving voltage for providing a stable operating voltage for the wireless intelligent module 62. After receiving the instruction of the user, the wireless intelligent module 62 drives the relay switch circuit 50 to be turned on and off, and the wireless intelligent module 62 is further configured to output a certain voltage to the operational amplifier control circuit 80, so that the operational amplifier control circuit 80 can normally operate.
Referring to fig. 1 to 8, in an embodiment of the present invention, the MOS switch circuit 40 includes: the transient diode comprises a first transient diode TVS1, a second transient diode TVS2, a first MOS transistor M1, a second MOS transistor M2 and a second resistor R2; the cathode of the first transient diode TVS1 is connected to the hot wire, the anode of the first transient diode TVS1 is grounded, the anode of the second transient diode TVS2 is connected to the anode of the first transient diode TVS1, the cathode of the second transient diode TVS2 is connected to the input terminal of the MOS transistor conduction power circuit 70, the drain of the first MOS transistor M1 is connected to the cathode of the first transient diode TVS1, the source of the first MOS transistor M1 is connected to the anode of the first transient diode TVS1, the gate of the first MOS transistor M1 is connected to the control terminal of the operational amplifier control circuit 80, the drain of the second MOS transistor M2 is connected to the cathode of the second transient diode TVS2, the source of the second MOS transistor M2 is connected to the anode of the second transient diode TVS2, and the gate of the second MOS transistor M2 is connected to the gate of the first MOS transistor M1, a first end of the second resistor R2 is connected to the anode of the first transient diode TVS1, and a second end of the second resistor R2 is connected to the gate of the second MOS transistor M2;
in this embodiment, when the access line is a zero-live line, the transformer conversion circuit 31 provides a 12V power supply voltage to the operational amplifier control circuit 80, and the operational amplifier control circuit 80 controls the first MOS transistor M1 and the second MOS transistor M2 to be turned on, because the output voltage of the operational amplifier control circuit 80 is similar to the power supply voltage, that is, 12V, at this time, the first MOS transistor M1 and the second MOS transistor M2 are in a completely turned-on state, and the resistance of the MOS transistors when turned on is very small, so the voltage drop across the MOS transistors is very small, thereby reducing the power consumption of the MOS transistors; when the access line is a single live wire and the relay switch circuit 50 is not switched on, the transformer conversion circuit 31 still provides power supply voltage for the operational amplifier control circuit 80, the operational amplifier control circuit controls the first MOS transistor M1 and the second MOS transistor M2 to be switched on completely, after the relay switch circuit 50 is switched on, the transformer conversion circuit 31 cannot work, at the moment, the live wire is rectified and powered through the MOS transistor switch-on circuit 70, 12V power supply voltage is output after filtering to the operational amplifier control circuit 80 and the LDO voltage stabilizing circuit 61, and the operational amplifier control circuit 80 controls the first MOS transistor M1 and the second MOS transistor M2 to be switched on and off periodically under the condition of the single live wire. In the embodiment, the first transient diode TVS1 and the second transient diode TVS2 are used to protect circuit components and devices, and prevent the circuit from being damaged due to live line surge and periodic switching of MOS transistors.
Referring to fig. 1 to 8, in an embodiment of the present invention, the MOS transistor conduction current circuit 70 includes: a third transient diode TVS3, a second diode D2, a third diode D3, a fourth diode D4, and a first capacitor C1; the anode of the second diode D2 is connected to the output terminal of the MOS switch circuit 40, the cathode of the second diode D2 is connected to the anode of the fourth diode D4, the anode of the third diode D3 is connected to the input terminal of the MOS switch circuit 40, the cathode of the third diode D3 is connected to the anode of the fourth diode D4, the cathode of the fourth diode D4 is connected to the first end of the first capacitor C1, the second end of the first capacitor C1 is grounded, the cathode of the third transient diode TVS3 is connected to the first end of the first capacitor C1, and the anode of the third transient diode TVS3 is connected to the second end of the first capacitor C1.
In this embodiment, when the access line is a single hot wire and the relay switch circuit 50 is not turned on, the transformer converter circuit 31 still provides a supply voltage to the operational amplifier control circuit 80, the operational amplifier control circuit controls the first MOS transistor M1 and the second MOS transistor M2 to be completely turned on, after the relay switch circuit 50 is turned on, the transformer converter circuit 31 cannot work, at this time, the MOS transistor conduction-taking circuit 70 rectifies the hot wire through the second diode D2, the third diode D3 and the fourth diode D4 to take power, and the supply voltage of 12V is filtered by the first capacitor C1 and then is output to the operational amplifier control circuit 80 and the LDO voltage regulator circuit 61.
Referring to fig. 1 to 8, in an embodiment of the present invention, the operational amplifier control circuit 80 includes: a first operational amplifier U1, a second operational amplifier U2, a fourth transient diode TVS4, third to seventh resistors R3 to R7, a second capacitor C2, fifth to seventh diodes D5 to D7, and a first transistor Q1; a cathode of the fourth transient diode TVS4 is connected to a cathode of the second diode D2, an anode of the fourth transient diode TVS4 is connected to a non-inverting input terminal of the first operational amplifier U1, a first terminal of the second capacitor C2 is connected to an anode of the fourth transient diode TVS4, a second terminal of the second capacitor C2 is grounded, a first terminal of the third resistor R3 is connected to an anode of the fourth transient diode TVS4, a second terminal of the third resistor R3 is grounded, an anode of the fifth diode D5 is connected to an output terminal of the wireless smart module 62, a cathode of the fifth diode D5 is connected to an inverting input terminal of the first operational amplifier U8538 through the fourth resistor R4, a collector of the first transistor Q1 is connected to an inverting input terminal of the first operational amplifier U1 through the fifth resistor R5, an emitter of the first transistor Q1 is grounded, the base of the first triode Q1 is connected to the output terminal of the first operational amplifier U1, the output terminal of the first operational amplifier U1 is connected to the anode of the sixth diode D6, the cathode of the sixth diode D6 is connected to the controlled terminal of the MOS switch circuit 40, the power supply terminal of the first operational amplifier U1 is connected to the output terminal of the MOS conduction passing circuit 70, the ground terminal of the first operational amplifier U1 is grounded, the cathode of the fifth diode D5 is connected to the same-direction input terminal of the second operational amplifier U2, the reverse-direction input terminal of the second operational amplifier U2 is connected to the output terminal of the LDO regulator circuit 61 through the sixth resistor R6, the reverse-direction input terminal of the second operational amplifier U2 is also grounded through the seventh resistor R7, the output terminal of the second operational amplifier U2 is connected to the anode of the seventh diode D7, the cathode of the seventh diode D7 is connected to the controlled terminal of the MOS transistor switch circuit 40, the power supply terminal of the second operational amplifier U2 is connected to the output terminal of the transformer conversion circuit 31, and the ground terminal of the second operational amplifier U2 is grounded;
when the live wire connection end 10 is connected to the live wire and the null wire connection end 20 is connected to the null wire, the operational amplifier control circuit 80 controls the first MOS transistor M1 and the second MOS transistor M2 to be continuously conducted by the output voltage of the second operational amplifier U2;
the operational amplifier control circuit 80 controls the first MOS transistor M1 and the second MOS transistor M2 to be continuously conducted by the output voltage of the second operational amplifier U2 only when the live wire connection terminal 10 is connected to the live wire; when the load is powered on, the first operational amplifier U1 outputs a voltage to control the first MOS transistor M1 and the second MOS transistor M2 to be periodically conducted.
In the embodiment, the operational amplifier control circuit 80 employs two operational amplifiers, so that the operational amplifier control circuit 80 operates by different operational amplifiers in different power-taking modes, thereby realizing the purpose of automatically identifying the access line, when the access line is a zero-live line, the transformer conversion circuit 31 provides 12V-2 working voltage for the second operational amplifier U2, in the embodiment, the output voltage of the LDO voltage regulator circuit 61 and the wireless intelligent module 62 is 3.3V, namely, the voltage V2 at the noninverting input terminal of the second operational amplifier U2 is 3.3V, the inverting input terminal of the second operational amplifier U2 is divided by the sixth resistor R6 and the seventh resistor R7 to 3.3V, that is, the voltage at the inverting input terminal of the second operational amplifier U2 is greater than the voltage at the inverting input terminal thereof, so the output voltage V0 of the second operational amplifier U2 is similar to the operating voltage thereof, and the first MOS transistor M1 and the second MOS transistor M2 are fully turned on; when the access line is a single live wire, when the relay switch circuit 50 is not conducted, the second operational amplifier U2 still controls the first MOS transistor M1 and the second MOS transistor M2 to be completely conducted, when the relay switch circuit 50 is conducted, the transformer conversion circuit 31 stops working, at this time, the MOS transistor power-taking circuit 70 provides 12V-1 working voltage to the first operational amplifier U1, the same-direction input end of the first operational amplifier U1 is connected to a V1 position between the second diode D2 and the fourth diode D4 of the MOS transistor power-taking circuit 70, the voltage here is obtained after the live wire is rectified by the second diode D2 and the third diode D3, so that the voltage is changed, the reverse input end of the first operational amplifier U1 divides 3.3V by the fourth resistor R4, when the voltage at the same-direction input end of the first operational amplifier U1 is greater than the voltage at the reverse input end thereof, the output voltage V0 is approximate to the working voltage thereof, the first MOS transistor M1 and the second MOS transistor M2 are completely conducted, and meanwhile, the first triode Q1 is conducted, so that the fourth resistor R4 and the fifth resistor R5 divide the voltage of 3.3V, the voltage of the reverse input end of the first operational amplifier U1 is reduced, and the time for completely conducting the first MOS transistor M1 and the second MOS transistor M2 is prolonged; when the voltage at the non-inverting input terminal of the first operational amplifier U1 is less than the voltage at the inverting input terminal thereof, the output voltage V0 is low, and the first MOS transistor M1, the second MOS transistor M2 and the first transistor Q1 are turned off, in this embodiment, the first MOS transistor M1 and the second MOS transistor M2 are turned on and off at a frequency of 50 HZ. This embodiment is through setting up first operational amplifier U1 and second operational amplifier U2 for the MOS pipe is in the work of different working methods under the electricity mode of getting of difference, thereby has reduced the consumption of MOS pipe under the zero fire state.
Referring to fig. 1 to 8, in an embodiment of the present invention, the relay switch circuit 50 includes: the relay KV, a ninth resistor R9, a tenth resistor R10, a second triode Q2 and an eighth diode D8; the base of the second triode Q2 is connected with the output terminal of the wireless intelligent module 62 through a ninth resistor R9, a first end of the tenth resistor R10 is connected to the base of the second transistor Q2, a second end of the tenth resistor R10 is connected to the emitter of the second transistor Q2, the emitter of the second triode Q2 is grounded, the collector of the second triode Q2 is connected with the second end of the relay KV, the anode of the eighth diode D8 is connected to the second end of the relay KV, the cathode of the eighth diode D8 is connected to the first end of the relay KV, the first end of the relay KV is connected with the output end of the transformer conversion circuit 31, the first end of the relay is also connected with the output end of the MOS transistor conduction power circuit 70, the third end of the relay KV is connected with a load, and the fourth end of the relay KV is connected with the output end of the MOS tube switching circuit 40;
when the relay KV is started, the third end of the relay KV is communicated with the fourth end of the relay KV, and at the moment, the live wire supplies power to the load through the first MOS tube M1, the second MOS tube M2 and the relay KV.
In this embodiment, the first end of the relay KV is connected to the output end of the transformer conversion circuit 31 and the MOS transistor conduction power circuit 70, after the wireless intelligent module 62 receives an instruction of starting by a user, the second triode Q2 is controlled to be conducted by outputting 3.3V voltage, after the second triode is conducted to the Q2, the current makes the relay KV conducted through the relay KV, the third end and the fourth end of the relay KV are communicated at this time, i.e., K0 is communicated with K1, so that the live wire supplies power to the load through the relay KV.
Referring to fig. 1 to 8, in an embodiment of the utility model, an input end of the LDO voltage regulator circuit 61 is further connected to an output end of the MOS transistor conduction current-taking circuit 70; the driving voltage output by the LDO voltage regulator circuit 61 is 3.3V, and is used for providing 3.3V driving voltage for the intelligent wireless module 62 and the operational amplifier control circuit 80.
In this embodiment, the input end of the LDO voltage stabilizing circuit 61 is connected to the output ends of the transformer converting circuit 31 and the MOS transistor conduction power circuit 70, and is configured to convert the 12V voltage output by the transformer converting circuit 31 and the MOS transistor conduction power circuit 70 into a stable 3.3V voltage, and provide the stable voltage to the intelligent wireless module 62 and the second operational amplifier U2.
Referring to fig. 1 to 8, in an embodiment of the present invention, the wireless intelligent module 62 includes: a control chip 621, an eighth resistor R8 and a light emitting diode LED; the anode of the light emitting diode LED is connected to the output end of the LDO voltage regulator circuit 61 through an eighth resistor R8, the cathode of the light emitting diode LED is connected to the input end of the control chip 621, and the output end of the control chip 621 is connected to the operational amplifier control circuit 80.
In this embodiment, after receiving a start instruction from a user, the wireless intelligent module 62 outputs a voltage of 3.3V to the second operational amplifier U2 and the relay switch circuit 50, so as to control the conduction of the first MOS transistor M1, the second MOS transistor M2 and the relay KV, and the light emitting diode LED is used for displaying the operating state of the wireless intelligent module 50, and when the light emitting diode LED emits light, it indicates that the wireless intelligent module 62 can operate normally.
The utility model further provides an intelligent device, which comprises the single-live-fire and zero-fire common-board circuit, the specific structure of the single-live-fire and zero-fire common-board circuit refers to the above embodiments, and the power circuit adopts all the technical schemes of all the embodiments, so that the intelligent device at least has all the beneficial effects brought by the technical schemes of the above embodiments, and the detailed description is omitted.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A single fire and zero fire common board circuit, comprising:
a live wire connecting end and a zero line connecting end;
the switch power supply circuit is provided with a positive input end, a negative input end, a positive output end and a negative output end; the positive input end is connected with the live wire connecting end, the negative input end is used for connecting a load, and the negative output end is grounded and connected with the zero line connecting end;
the switching circuit comprises an MOS tube switching circuit and a relay switching circuit, wherein the MOS tube switching circuit and the relay switching circuit are used for being connected between a live wire and a load in series;
the intelligent control circuit is used for controlling the on and off of the relay switch circuit so as to communicate a live wire and a load;
the input end of the MOS tube conduction power circuit is connected with the live wire connecting end, and the output end of the MOS tube conduction power circuit is connected with the input end of the intelligent control circuit; and
the operational amplifier control circuit is provided with a first signal input end, a second signal input end and a signal output end, and the first signal input end is connected with the positive output end of the switch power supply circuit; the second signal input end is connected with the output end of the MOS tube conduction electric circuit; the signal output end is connected with the MOS tube switch circuit;
when the live wire connecting end is connected with a live wire and the zero line connecting end is connected with a zero line, the switch power supply circuit is used for sequentially rectifying and transforming an input alternating current power supply into a direct current power supply and outputting the direct current power supply to the intelligent control circuit and the operational amplifier control circuit, and the intelligent control circuit is used for receiving the direct current power supply to work so as to control the relay switch circuit to be started; the operational amplifier control circuit is used for receiving the work of the direct-current power supply to control the opening of an MOS tube switching circuit, and when the MOS tube switching circuit and the relay switching circuit are both opened, the load is controlled to be electrified;
only when the live wire connecting end is connected with the live wire, the switch power supply circuit is used for forming a loop through a connected load so as to output a direct current power supply to the intelligent control circuit and the operational amplifier control circuit after sequentially rectifying and transforming the input alternating current power supply, and the intelligent control circuit is used for receiving the direct current power supply to work so as to control the relay switch circuit to be started; the operational amplifier control circuit is used for receiving the work of the direct-current power supply to control the opening of an MOS tube switching circuit, and when the MOS tube switching circuit and the relay switching circuit are both opened, the operational amplifier control circuit controls the electrification of a load, controls the conduction and electricity taking circuit of the MOS tube to work and outputs the direct-current power supply so as to maintain the work of the intelligent control circuit and the operational amplifier control circuit; and after the load is electrified, the power-taking circuit of the switching power supply is bypassed.
2. The single live and zero live common board circuit according to claim 1, wherein the switching power supply circuit comprises: the first diode, the bridge stack and the transformer conversion circuit; the positive input end of the bridge stack is connected with the live wire connecting end, the negative input end of the bridge stack is connected with a load, the positive output end of the bridge stack is connected with the input end of the transformer conversion circuit, the negative output end of the bridge stack is grounded, the anode of the first diode is connected with the negative output end of the bridge stack, the cathode of the first diode is connected with the zero line connecting end, and the output end of the transformer conversion circuit is connected with the input ends of the intelligent control circuit and the operational amplifier control circuit;
the bridge rectifier is used for rectifying an input alternating current power supply and outputting the rectified alternating current power supply to the transformer conversion circuit when the live wire connecting end is connected with a live wire and the zero line connecting end is connected with a zero line, and the transformer conversion circuit transforms the input alternating current power supply and outputs a direct current power supply to the intelligent control circuit and the operational amplifier control circuit;
only when the live wire connecting end is connected with a live wire, the bridge rectifier is used for forming a loop through a connected load so as to rectify and output an input alternating current power supply to the transformer conversion circuit, and the transformer conversion circuit transforms the input alternating current power supply and outputs a direct current power supply to the intelligent control circuit and the operational amplifier control circuit; and when the load is electrified, the live wire and the load form a loop to bypass the bridge stack.
3. A single fire and zero fire common board circuit as claimed in claim 2, wherein said intelligent control circuit comprises:
the input end of the LDO voltage stabilizing circuit is connected with the output end of the transformer conversion circuit and used for converting the power supply voltage into a driving voltage;
the input end of the wireless intelligent module is connected with the output end of the LDO voltage stabilizing circuit, and the output end of the wireless intelligent module is connected with the first input end of the operational amplifier control circuit and used for controlling the relay switch circuit and the operational amplifier control circuit.
4. A single fire and zero fire common board circuit as claimed in claim 3, wherein said MOS transistor switching circuit comprises: the transient diode circuit comprises a first transient diode, a second transient diode, a first MOS (metal oxide semiconductor) transistor, a second MOS transistor and a second resistor; the cathode of the first transient diode is connected with a live wire, the anode of the first transient diode is grounded, the anode of the second transient diode is connected with the anode of the first transient diode, the cathode of the second transient diode is connected with the input end of the MOS tube conduction power circuit, the drain of the first MOS tube is connected with the cathode of the first transient diode, the source of the first MOS tube is connected with the anode of the first transient diode, the gate of the first MOS tube is connected with the control end of the operational amplifier control circuit, the drain of the second MOS tube is connected with the cathode of the second transient diode, the source of the second MOS tube is connected with the anode of the second transient diode, the gate of the second MOS tube is connected with the gate of the first MOS tube, and the first end of the second resistor is connected with the anode of the first transient diode, and the second end of the second resistor is connected with the grid electrode of the second MOS tube.
5. The single live and zero live common board circuit according to claim 4, wherein the MOS tube conduction current-carrying circuit comprises: a third transient diode, a second diode, a third diode, a fourth diode and a first capacitor; the positive pole of the second diode is connected with the output end of the MOS tube switch circuit, the negative pole of the second diode is connected with the positive pole of the fourth diode, the positive pole of the third diode is connected with the input end of the MOS tube switch circuit, the negative pole of the third diode is connected with the positive pole of the fourth diode, the negative pole of the fourth diode is connected with the first end of the first capacitor, the second end of the first capacitor is grounded, the negative pole of the third transient diode is connected with the first end of the first capacitor, and the positive pole of the third transient diode is connected with the second end of the first capacitor.
6. A single fire and zero fire common board circuit as claimed in claim 5, wherein said operational amplifier control circuit comprises: the first operational amplifier, the second operational amplifier, the fourth transient diode, the third resistor to the seventh resistor, the second capacitor, the fifth diode to the seventh diode and the first triode; the cathode of the fourth transient diode is connected with the cathode of the second diode, the anode of the fourth transient diode is connected with the unidirectional input end of the first operational amplifier, the first end of the second capacitor is connected with the anode of the fourth transient diode, the second end of the second capacitor is grounded, the first end of the third resistor is connected with the anode of the fourth transient diode, the second end of the third resistor is grounded, the anode of the fifth diode is connected with the output end of the wireless intelligent module, the cathode of the fifth diode is connected with the reverse input end of the first operational amplifier through the fourth resistor, the collector of the first triode is connected with the reverse input end of the first operational amplifier through the fifth resistor, the emitter of the first triode is grounded, and the base of the first triode is connected with the output end of the first operational amplifier, the output end of the first operational amplifier is connected with the anode of the sixth diode, the cathode of the sixth diode is connected with the controlled end of the MOS tube switching circuit, the power supply end of the first operational amplifier is connected with the output end of the MOS tube conduction current-taking circuit, the grounding end of the first operational amplifier is grounded, the cathode of the fifth diode is connected with the same-direction input end of the second operational amplifier, the reverse input end of the second operational amplifier is connected with the output end of the LDO voltage stabilizing circuit through the sixth resistor, the reverse input end of the second operational amplifier is grounded through a seventh resistor, the output end of the second operational amplifier is connected with the anode of the seventh diode, the cathode of the seventh diode is connected with the controlled end of the MOS tube switching circuit, and the power supply end of the second operational amplifier is connected with the output end of the transformer conversion circuit, the grounding end of the second operational amplifier is grounded;
when the live wire connecting end is connected with a live wire and the zero line connecting end is connected with a zero line, the operational amplifier control circuit controls the first MOS tube and the second MOS tube to be continuously conducted through the output voltage of the second operational amplifier;
when the live wire connecting end is connected with a live wire, the operational amplifier control circuit controls the first MOS tube and the second MOS tube to be continuously conducted through the output voltage of the second operational amplifier; when the load is powered on, the first MOS tube and the second MOS tube are controlled to be periodically conducted by the output voltage of the first operational amplifier.
7. A single fire and zero fire common board circuit as defined in claim 6, wherein said relay switch circuit comprises: the relay, a ninth resistor, a tenth resistor, a second triode and an eighth diode; the base of the second triode is connected with the output end of the wireless intelligent module through a ninth resistor, the first end of the tenth resistor is connected with the base of the second triode, the second end of the tenth resistor is connected with the emitter of the second triode, the emitter of the second triode is grounded, the collector of the second triode is connected with the second end of the relay, the anode of the eighth diode is connected with the second end of the relay, the cathode of the eighth diode is connected with the first end of the relay, the first end of the relay is connected with the output end of the transformer conversion circuit, the first end of the relay is further connected with the output end of the MOS tube conduction and power taking circuit, the third end of the relay is connected with a load, and the fourth end of the relay is connected with the output end of the MOS tube switching circuit;
when the relay is opened, the third end of the relay is communicated with the fourth end of the relay, and at the moment, the live wire supplies power to the load through the first MOS tube, the second MOS tube and the relay.
8. The single-fire zero-fire common-board circuit as claimed in claim 6, wherein the input terminal of the LDO voltage regulator circuit is further connected to the output terminal of the MOS transistor conducting power-taking circuit; the driving voltage output by the LDO voltage stabilizing circuit is 3.3V and is used for providing 3.3V driving voltage for the intelligent wireless module and the operational amplifier control circuit.
9. A single fire and zero fire common board circuit as claimed in claim 8, wherein said wireless intelligent module comprises: the control chip, the eighth resistor and the light emitting diode; the anode of the light emitting diode is connected with the output end of the LDO voltage stabilizing circuit through an eighth resistor, the cathode of the light emitting diode is connected with the input end of the control chip, and the output end of the control chip is connected with the operational amplifier control circuit.
10. A smart device comprising a single fire and zero fire co-board circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121392930.8U CN215817960U (en) | 2021-06-22 | 2021-06-22 | Single-fire zero-fire common-board circuit and intelligent equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121392930.8U CN215817960U (en) | 2021-06-22 | 2021-06-22 | Single-fire zero-fire common-board circuit and intelligent equipment |
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| Publication Number | Publication Date |
|---|---|
| CN215817960U true CN215817960U (en) | 2022-02-11 |
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| CN202121392930.8U Active CN215817960U (en) | 2021-06-22 | 2021-06-22 | Single-fire zero-fire common-board circuit and intelligent equipment |
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| Country | Link |
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| CN (1) | CN215817960U (en) |
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2021
- 2021-06-22 CN CN202121392930.8U patent/CN215817960U/en active Active
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