CN111491423A - Single-fire switch circuit and single-fire switch device - Google Patents
Single-fire switch circuit and single-fire switch device Download PDFInfo
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- CN111491423A CN111491423A CN202010235291.8A CN202010235291A CN111491423A CN 111491423 A CN111491423 A CN 111491423A CN 202010235291 A CN202010235291 A CN 202010235291A CN 111491423 A CN111491423 A CN 111491423A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a single fire switch circuit and a single fire switch device, wherein the single fire switch circuit comprises: the device comprises a fire wire port, a first load port, a lamp turning-on electricity taking module, a lamp turning-off electricity taking module, a first relay and a control module; the fire wire port is used for being connected with a fire wire; the first load port is used for being connected with a zero line through a load; the control module is used for controlling the opening and closing of the first relay according to a control instruction; the lamp turning-off and power taking module is used for supplying power to the control module when the first relay is switched off and stopping supplying power to the control module when the first relay is switched on; and the light-on and power-taking module is used for supplying power to the control module when the first relay is closed and stopping supplying power to the control module when the first relay is disconnected.
Description
Technical Field
The invention relates to the technical field of power supply circuits, in particular to a single-fire switch circuit and a single-fire switch device.
Background
At present, generally only live wire in the lamps and lanterns mechanical switch of domestic use, intelligence switch need get the electricity through single live wire in order can the original mechanical switch of direct replacement and need not rewire. Wherein, single live wire switch only is connected with the live wire, comes the switching of control switch through control chip, but present single live wire switch is just equivalent to the disconnection power after the switch disconnection, and only manual reclosing switch.
Disclosure of Invention
The embodiment of the invention aims to provide a single live wire switch circuit and a single live wire switch device, which can solve the problem that the existing single live wire switch needs to be manually closed after the switch is disconnected.
In order to solve the above technical problem, an embodiment of the present invention provides a single fire switch circuit, including: the device comprises a fire wire port, a first load port, a lamp turning-on electricity taking module, a lamp turning-off electricity taking module, a first relay and a control module;
the fire wire port is used for being connected with a fire wire;
the first load port is used for being connected with a zero line through a load;
the control module is used for controlling the opening and closing of the first relay according to a control instruction;
the lamp turning-off and power taking module is used for supplying power to the control module when the first relay is switched off and stopping supplying power to the control module when the first relay is switched on;
the lamp turning-on and power taking module is used for supplying power to the first load port and the control module when the first relay is closed and stopping supplying power to the first load port and the control module when the first relay is disconnected;
the live wire port is connected with the live wire end of the light-on electricity-taking module, the null wire end of the light-on electricity-taking module is connected with the first input end of the first relay, and the output end of the first relay is connected with the first load port; the live wire end of the lamp turning-off electricity taking module is connected with the live wire port, and the zero line end of the lamp turning-off electricity taking module is connected with the first load port; the first control end of the control module is connected with the controlled end of the first relay, the first power end of the control module is connected with the power supply end of the power taking module when the lamp is turned on, and the second power end of the control module is connected with the power supply end of the power taking module when the lamp is turned off.
As an improvement of the above scheme, the lamp turning-off and power taking module comprises: the device comprises a first fire wire port, a first zero wire port, a surge protection circuit, a rectifying circuit, an AC-DC voltage reduction circuit and a fuse;
the first fire wire port is connected with the fire wire port and is connected with the input end of the surge protection circuit; the output end of the surge protection circuit is connected with the first input end of the rectifying circuit, the output end of the rectifying circuit is connected with the input end of the AC-DC voltage reduction circuit, the power supply end of the AC-DC voltage reduction circuit is connected with the second power supply end of the control module, and the second input end of the rectifying circuit is connected with the first zero line port through the fuse; the first neutral port is connected with the first load port.
As an improvement of the above aspect, the surge protection circuit includes: a first resistor and a first voltage dependent resistor; the first end of the first resistor is connected with the first fire wire port, and the second end of the first resistor is connected with the first input end of the rectifying circuit; the first end of the first piezoresistor is connected between the input port and the first resistor, and the second end of the piezoresistor is connected with the output port through the fuse;
the rectifier circuit includes: a first diode, a second diode, a third diode and a fourth diode; the cathode of the first diode is connected with the anode of the second diode, the cathode of the second diode is connected with the cathode of the third diode, the anode of the third diode is connected with the cathode of the fourth diode, and the anode of the fourth diode is connected with the anode of the first diode; the output end of the surge protection circuit is connected between the cathode of the first diode and the anode of the second diode, the input end of the AC-DC voltage reduction circuit is connected between the anode of the fourth diode and the anode of the first diode, and the output port is connected between the anode of the third diode and the cathode of the fourth diode through the fuse;
the AC-DC buck circuit includes: the circuit comprises a power supply chip, a transformer, an optocoupler, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth diode, a first voltage stabilizing diode, a reference voltage source and a first voltage output port; the transformer has a first primary winding, a second primary winding and a first secondary winding; the first end of the first primary winding is connected with the output end of the rectifying circuit, the second end of the first primary winding is connected with the D pin of the power chip, the FB pin of the power chip is connected with the emitter of the NPN light receiver of the optical coupler, and the BP pin of the power chip is connected with the collector of the NPN light receiver of the optical coupler; the first end of the first capacitor is connected between the rectification output end of the rectification circuit and the first end of the first primary winding, and the second end of the first capacitor is grounded; four S pins of the power supply chip are connected between the second end of the first capacitor and the ground; the second capacitor is connected in parallel between the four S pins and the BP pin; the first end of the second primary winding is grounded with the third capacitor through the fifth diode in sequence, and the second end of the second primary winding is grounded; a first end of the second resistor is connected with the BP pin, and a second end of the second resistor is connected between the fifth diode and the third capacitor; the first end of the secondary winding is connected with the anode of a light emitter of the optical coupler through the first voltage stabilizing diode, the second end of the secondary winding is grounded, the cathode of the light emitter is connected with the first end of the reference voltage source through the third resistor, the second end of the reference voltage source is grounded, one end of the fourth resistor is connected between the third resistor and the first end of the reference voltage source, and the other end of the fourth resistor is connected with the third end of the reference voltage source; one end of the fourth capacitor is connected between the first voltage-stabilizing diode and the anode of the light emitter of the optocoupler, and the other end of the fourth capacitor is grounded; the first voltage output port is connected with the anode of a light emitter of the optocoupler and is also connected with a second power supply end of the control module.
As an improvement of the above scheme, the light turning-off and power taking module further comprises: a fifth resistor, a sixth resistor and a second zener diode; the fifth resistor, the sixth resistor and the second voltage stabilizing diode are connected in parallel and connected between the first rectifying output end of the rectifying circuit and the input end of the AC-DC voltage reducing circuit.
As an improvement of the above scheme, the power module for turning on the lamp comprises: the power supply comprises a first field effect transistor, a second field effect transistor, a power supply output circuit used for providing power supply for the control module when the first relay is closed, a hysteresis comparator circuit, a self-starting circuit, a seventh resistor and a second voltage output port;
the source electrode of the first field effect transistor is connected with the fire wire port and grounded, the drain electrode of the first field effect transistor is connected with the first input end of the first relay, the drain electrode of the first field effect transistor is also connected with the input end of the power output circuit, the power supply end of the power output circuit is connected with the first power supply end of the control module, the output end of the power output circuit is connected with the input end of the hysteresis comparator circuit, the output end of the hysteresis comparator circuit is connected with the grid electrode of the second field effect transistor, the drain electrode of the second field effect transistor is connected with the second voltage output port through the seventh resistor, and the source electrode of the second field effect transistor is grounded; the grid electrode of the first field effect transistor is connected between the drain electrode of the second field effect transistor and the seventh resistor;
one end of the self-starting circuit is connected between the seventh resistor and the second voltage output port, and the other end of the self-starting circuit is connected between the drain electrode of the second field effect transistor and the seventh resistor; the self-starting circuit is used for controlling the voltage between the drain electrode of the second field effect transistor and the seventh resistor to be 0 when the single fire switch circuit is powered on, and stopping controlling the voltage between the drain electrode of the second field effect transistor and the seventh resistor after the power output circuit outputs a preset voltage.
As an improvement of the above aspect, the power output circuit includes: the first Schottky diode, the fourth voltage stabilizing diode, the fourth voltage output port, the fifth voltage output port, the sixth capacitor and the eighth resistor; the first schottky diode is connected between the drain electrode of the first field effect transistor and the input end of the hysteresis comparator circuit, the fourth voltage output port is connected between the first schottky diode and the input end of the hysteresis comparator circuit, and the fourth voltage output port is also connected with the first power supply end of the control module; one end of the sixth capacitor is connected between the first Schottky diode and the input end of the hysteresis comparator circuit, and the other end of the sixth capacitor is grounded; a first end of the eighth resistor is connected between the first schottky diode and the input end of the hysteresis comparator circuit, and a second end of the eighth resistor is grounded through the fourth zener diode; the fifth voltage output port is connected between the second end of the eighth resistor and the fourth zener diode;
the hysteresis comparator circuit includes: a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixth voltage output port, a seventh voltage output port, and a comparator; the output end of the power output circuit is grounded through the ninth resistor and the tenth resistor in sequence, and the sixth voltage output port is grounded through the eleventh resistor and the twelfth resistor in sequence; a negative input end of the comparator is connected between the ninth resistor and the tenth resistor, a voltage input end of the comparator is connected with the seventh voltage output port, a grounding end of the comparator is grounded, a positive input end of the comparator is connected between the eleventh resistor and the twelfth resistor, and an output end of the comparator is connected with a gate of the second field effect transistor through the thirteenth resistor; the fourteenth resistor is connected in parallel between the output end and the voltage input end of the comparator; the fifteenth resistor is connected in parallel between the output end and the positive input end of the comparator;
the self-starting circuit comprises: a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, an eighth capacitor, a ninth capacitor, a fifth zener diode, a first NPN triode, and a second NPN triode; a first end of the sixteenth resistor is connected between the eighth resistor and the second voltage output port, and a second end of the sixteenth resistor is grounded with the seventeenth resistor through a fifth voltage-stabilizing diode in sequence; a first end of the eighth capacitor is connected with a first end of the sixteenth resistor, and a second end of the eighth capacitor is grounded; a first end of the eighteenth resistor is connected with a first end of the sixteenth resistor, a second end of the eighteenth resistor is connected with a collector of the first NPN triode, a base of the first NPN triode is connected between the fifth voltage regulator diode and the seventeenth resistor, and an emitter of the first NPN triode is grounded; the ninth capacitor is connected with the seventeenth resistor in parallel; the base electrode of the second NPN triode is connected between the collector electrode of the first NPN triode and the eighteenth resistor, the emitter electrode of the second NPN triode is grounded, and the collector electrode of the second NPN triode is connected between the drain electrode of the second field effect transistor and the eighth resistor.
As a modification of the above, the sixth capacitor is a polypropylene capacitor.
As an improvement of the above scheme, the power module is powered by turning on the lamp further comprising: a ninth capacitor and a tenth capacitor; the ninth capacitor and the tenth capacitor are both connected in parallel between the source and the gate of the first field effect transistor
Or, turn on light and get electric module still includes: a second Schottky diode connected in parallel between the source and the drain of the first field effect transistor;
or, turn on light and get electric module still includes: an eleventh capacitance; the eleventh capacitor is connected in parallel between the source and the gate of the second field effect transistor.
As an improvement of the above scheme, the single fire switch circuit further comprises a second relay and a second load port; the second load port is used for being connected with a zero line through a load; the input end of the second relay is connected with the fire wire port, the output end of the second relay is connected with the second load port, and the controlled end of the second relay is connected with the second control end of the control module; the control module is further used for controlling the second relay to be opened and closed according to a control instruction.
Another embodiment of the present invention provides a single live switch device, including the single live switch circuit according to any one of the above embodiments.
Compared with the prior art, according to the single-fire switch circuit and the single-fire switch device provided by the embodiment of the invention, the light-on power-taking module and the light-off power-taking module are arranged, and when the first relay is closed, the light-on power-taking module can supply power to the first load port and the control module; and when the first relay is disconnected, the lamp turning-off and power taking module supplies power to the control module. Therefore, the embodiment of the invention can avoid the phenomenon that the control module is powered off after the lamp is turned off, thereby solving the problem that the switch of the existing single live wire switch needs to be closed manually after the switch is turned off.
Drawings
Fig. 1 is a schematic circuit diagram of a one-fire switch circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit structure diagram of the lamp-turning-off and power-taking module shown in fig. 1;
fig. 3 and 4 are schematic partial circuit structures of the light-on power-taking module shown in fig. 1.
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.
Referring to fig. 1, an embodiment of the invention provides a single live wire switch circuit, which includes a live wire port L in, a first load port L out1, a light-on and power-taking module 1, a light-off and power-taking module 2, a first relay SW1 and a control module 3, wherein the live wire port L in is used for being connected with a live wire, the first load port L out1 is used for being connected with a live wire through a load, the control module 3 is used for controlling the on and off of the first relay SW1 according to a control command, the light-off and power-taking module 2 is used for supplying power to the control module 3 when the first relay SW1 is disconnected and stopping supplying power to the control module 3 when the first relay SW1 is closed, the light-on and power-taking module 1 is used for supplying power to the first load port L out1 and the control module 3 when the first relay SW1 is closed, the first load port 1 and the light-on and power-taking module SW 862 is connected with a first power-on and a power-off port 847 of the first relay SW 463, and the light-taking module is connected with a power-on and a power-off port 8653 of the first relay SW 593, and the first relay SW1, and the power-taking module is connected with a power-on and a power-off and a power-taking module 862 of the first relay SW 862, wherein the first relay SW 867, the power-off and the power-taking module is connected with a power-off and a power-taking module 863, and a power-off control module 867 of the first relay SW 867, the power-off and a power-off relay SW load port of the control module.
In the embodiment of the invention, by arranging the light-on and power-taking module 1 and the light-off and power-taking module 2, when the first relay SW1 is closed, the light-on and power-taking module 1 can supply power to the first load port L out1 and the control module 3, and when the first relay SW1 is disconnected, the light-off and power-taking module 2 supplies power to the control module 3.
The load may illustratively be a light fixture, i.e., the first load port L out1 is connected to the zero line by a light fixture, by way of example, the control module 3 is a zigbee control module 3.
Illustratively, referring to fig. 2, the light-off electricity taking module 2 includes a first live wire port L n1, a first neutral wire port L o1, a surge protection circuit 20, a rectification circuit 21, an AC-DC voltage reduction circuit 23 and a fuse F1, the first live wire port L n1 is connected with the live wire port L in and connected with an input end of the surge protection circuit 20, an output end of the surge protection circuit 20 is connected with a first input end of the rectification circuit 21, an output end of the rectification circuit 21 is connected with an input end of the AC-DC voltage reduction circuit 23, a power supply end of the AC-DC voltage reduction circuit is connected with a second power supply end of the control module, a second input end of the rectification circuit 21 is connected with the first neutral wire port L o1 through the fuse F1, and the first neutral wire port L o1 is connected with the first load port.
In the present embodiment, the first live port L n1 is connected to live wire, the first neutral port L o1 is connected to neutral wire through the first load port L out1 and the lamps in turn, when the first relay SW1 is turned off, a high voltage difference exists between the first live port L n1 and the first neutral port L o1, the high voltage input by the live wire is converted into low voltage through the AC-DC voltage reduction circuit 23 for supplying power to the control module 3, since the first load port L out1 is not directly connected to the zero wire but is connected to the neutral wire through the lamps, it is necessary to take power by leakage current on the lamps, wherein the surge protection circuit 20 is used for protecting the circuit from surge, the rectifier circuit 21 is used for rectifying alternating current input by the live wire, and the fuse F1 plays a role in protecting the circuit when the circuit is over-current, and when the first relay SW1 is turned on, the AC-DC voltage reduction circuit 23 no longer works normally.
Further, this scheme still includes two step-down circuits (not shown in the figure), and one of them step-down circuit is located and closes between lamp and get electric module 2 and control module 3, and another step-down circuit is located and opens lamp and gets between electric module 1 and the control module 3, and these two step-down circuits are used for getting the output voltage (if 13V, 3.5V) of electric module with two and convert preset standard voltage (if 3.3V) into, give control module 3 again.
Referring to fig. 2 and 4, Vout1 is: the output voltage of the lamp turning-off electricity-taking module; vout4 is: and the output voltage of the power-on module is switched on.
Illustratively, referring to fig. 2, the surge protection circuit 20 includes a first resistor R1 and a first varistor RV1, a first end of the first resistor R1 is connected to the first firewire port L n1, a second end of the first resistor R1 is connected to the first input end of the rectifier circuit 21, a first end of the first varistor RV1 is connected between the input port and the first resistor R1, and a second end of the varistor is connected to the output port through the fuse F1.
The first piezoresistor RV1 is used for clamping voltage when the circuit bears overvoltage, and absorbing redundant current; and the first resistor R1 improves the surge protection capability.
Illustratively, referring to fig. 2, the rectifier circuit 21 includes: a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4; the cathode of the first diode D1 is connected with the anode of the second diode D2, the cathode of the second diode D2 is connected with the cathode of the third diode D3, the anode of the third diode D3 is connected with the cathode of the fourth diode D4, and the anode of the fourth diode D4 is connected with the anode of the first diode D1; an output end of the surge protection circuit 20 is connected between a cathode of the first diode D1 and an anode of the second diode D2, an input end of the AC-DC step-down circuit 23 is connected between an anode of the fourth diode D4 and an anode of the first diode D1, and the output port is connected between an anode of the third diode D3 and a cathode of the fourth diode D4 through the fuse F1.
The rectifier circuit 21 is a full bridge formed by four diodes, i.e., a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4.
Illustratively, referring to fig. 2, the AC-DC voltage step-down circuit 23 includes: the circuit comprises a power chip U1, a transformer T1, an optical coupler (comprising a light emitter U2A and a light receiver U2B), a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth diode D5, a first voltage stabilizing diode Z1, a reference voltage source D10 and a first voltage output port Vout 1; the transformer T1 has a first primary winding, a second primary winding, and a secondary winding; a first end of the first primary winding is connected with an output end of the rectifying circuit 21, a second end of the first primary winding is connected with a pin D of the power chip U1, a pin FB of the power chip U1 is connected with an emitter of the optical coupler NPN light receiver U2B, and a pin BP of the power chip U1 is connected with a collector of the optical coupler NPN light receiver U2B; a first end of the first capacitor C1 is connected between a first rectified output end of the rectifying circuit 21 and a first end of the first primary winding, and a second end of the first capacitor C1 is grounded; the four S pins of the power chip U1 are connected between the second end of the first capacitor C1 and the ground; the second capacitor C2 is connected in parallel between the four S pins and the BP pin; the first end of the second primary winding is grounded with a third capacitor C3 through a fifth diode D5 in sequence, and the second end of the second primary winding is grounded; a first end of the second resistor R2 is connected with the BP pin, and a second end of the second resistor R2 is connected between the fifth diode D5 and the third capacitor C3; a first end of the secondary winding is connected with an anode of a light emitter U2A of the optical coupler through the first voltage stabilizing diode Z1, a second end of the secondary winding is grounded, a cathode of the light emitter U2A is connected with a first end of a reference voltage source D10 through the third resistor R3, a second end of the reference voltage source D10 is grounded, one end of a fourth resistor R4 is connected between the third resistor R3 and the first end of the reference voltage source D10, and the other end of the fourth resistor R4 is connected with a third end of the reference voltage source D10; one end of the fourth capacitor C4 is connected between the first zener diode Z1 and the anode of the light emitter U2A of the optocoupler, and the other end of the fourth capacitor C4 is grounded; the first voltage output port Vout1 is connected to the anode of the light emitter U2A of the optocoupler, and is further connected to the second power supply terminal of the control module. It should be noted that the first voltage port Vout1 is a power supply terminal of the AC-DC voltage reduction circuit 23.
The power chip U1 controls the voltage conversion according to the feedback signal of the optical coupler. The reference voltage source D10 sets the output voltage of the AC-DC buck circuit 23 along with the third resistor R3, the fourth resistor R4, and the light emitter U2A. And the fifth diode D5 and the third capacitor C3 both assist the primary winding to power the power chip U1.
When the first relay SW1 is turned off and the lamp is turned off, a high-voltage difference exists between the first live wire port L n1 and the first neutral wire port L o1, high-voltage alternating current input from the live wire is converted into high-voltage direct current through the rectifying circuit 21, at this time, the power supply chip U1 is powered on to work, and high-voltage is converted into low-voltage Vout1 power supply through the work of the control transformer T1, so that the control module 3 is powered, and when the first relay SW1 is turned on, the voltage between L n1 and L o1 is lower than 13V, so that normal Vout1 voltage cannot be output.
In this embodiment, the output end optocoupler feedback mode is adopted, so that the precision of the output voltage is improved, and lower idle current can be realized.
As an improvement of the above scheme, referring to fig. 2, the light-off power-taking module 2 further includes: a fifth resistor R5, a sixth resistor R6 and a second zener diode Z2; the fifth resistor R5, the sixth resistor R6 and the second zener diode Z2 are connected in parallel and connected between the first rectified output terminal of the rectifying circuit 21 and the input terminal of the AC-DC step-down circuit 23.
The fifth resistor R5 and the sixth resistor R6 are current-limiting resistors, and are used for reducing current fluctuation of a circuit, inhibiting electromagnetic interference and avoiding flickering of a lamp. The second zener diode Z2 functions to provide a current path during power-on, so as to prevent an excessive voltage drop between the fifth resistor R5 and the sixth resistor R6.
Illustratively, referring to fig. 3 and 4, the power-on and power-taking module 1 includes a first fet Q1, a second fet Q2, a power output circuit 11 for supplying power to the control module when the first relay SW1 is closed, a hysteresis comparator circuit 12, a self-starting circuit 13, a seventh resistor R7 and a second voltage output port Vout2, wherein a source of the first fet Q1 is connected to the hot line port L in and grounded, a drain of the first fet Q1 is connected to a first input terminal of the first relay SW1, a drain of the first fet Q1 is further connected to an input terminal of the power output circuit 11, a power supply terminal of the power output circuit is connected to a first power supply terminal of the control module, an output terminal of the power output circuit 11 is connected to an input terminal of the hysteresis comparator circuit 12, an output terminal of the hysteresis comparator circuit 12 is connected to a gate of the second fet Q2, a drain of the second fet Q8642 is connected to a drain of the second fet Q2, and a drain of the second fet Q8672 is connected to a second resistor R8672, and a drain of the second fet Q7, wherein the second fet Q7 is connected between the drain of the second fet Q1 and a resistor R3614, the second fet Q3614, and a resistor R3614 is connected to control circuit for controlling the power output voltage output from the second fet R3614 when the second fet Q3614 is controlled by a predetermined voltage output from the second voltage output terminal of the second fet 3614, and a second fet R3614, and a second fet 3614 is connected between the second fet 3614, and a resistor R3614, wherein the second fet 3614 is.
The power output of the power-on and power-taking module is Vout4, and Vout4 can be converted to 3.3V by a DC-DC voltage-reducing circuit (not shown) to supply power to the control module 3.
In this embodiment, when the one-shot switch circuit is powered on, the voltage between the drain of the second fet Q2 and the seventh resistor R7 is 0, the voltage at the gate of the first fet Q1 is 0, the first fet Q1 is turned off, and the output voltage Vout4 of the power output circuit 11 is gradually increased. When the Vout4 increases to above 5.1V, the Vout5 outputs voltage to Vout7, i.e. the hysteresis comparator module is powered on to start working, and the V-GATE is not controlled by the self-starting circuit and is controlled by the hysteresis comparator circuit. Until Vout4 increases to a target value, the control module may be powered by a DC-DC voltage reduction circuit (not shown).
For example, referring to fig. 3 and 4, the power output circuit 11 includes: a first schottky diode SBD1, a fourth zener diode Z4, a fourth voltage output port Vout4, a fifth voltage output port Vout5, a sixth capacitor C6 and an eighth resistor R8; the first schottky diode SBD1 is connected between the drain of the first field effect transistor Q1 and the input terminal of the hysteresis comparator circuit 12, the fourth voltage output port Vout4 is connected between the first schottky diode SBD1 and the input terminal of the hysteresis comparator circuit 12, and the fourth voltage output port is further connected to the first power terminal of the control module; one end of the sixth capacitor C6 is connected between the first schottky diode SBD1 and the input end of the hysteresis comparator circuit 12, and the other end of the sixth capacitor C6 is grounded; a first end of the eighth resistor R8 is connected between the first schottky diode SBD1 and the input terminal of the hysteresis comparator circuit 12, and a second end of the eighth resistor R8 is connected to the ground through the fourth zener diode Z4; the fifth voltage output port Vout5 is connected between the second end of the eighth resistor R8 and the fourth zener diode Z4. The fourth voltage port Vout4 is a power supply terminal of the power output circuit 11.
The sixth capacitor C6 is an energy storage capacitor, and can be connected in series with an external lamp when the lamp is turned on, and can be divided by voltage of the lamp. Specifically, the voltage across the sixth capacitor C6 may be set at 13V, so that the voltage across the lamp approaches the rated voltage, and the influence on the lamp is reduced.
Illustratively, the sixth capacitor C6 is a polypropylene capacitor, which can reduce the no-load loss of the circuit.
Illustratively, referring to fig. 3 and 4, the hysteresis comparator circuit 12 includes: a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixth voltage output port Vout6, a seventh voltage output port Vout7 and a comparator U10; the output end of the power output circuit 11 is grounded through the ninth resistor R9 and the tenth resistor R10 in sequence, and the sixth voltage output port Vout6 is grounded through the eleventh resistor R11 and the twelfth resistor R12 in sequence; a negative input terminal of the comparator U10 is connected between the ninth resistor R9 and the tenth resistor R10, a voltage input terminal of the comparator U10 is connected to the seventh voltage output port Vout7, a ground terminal of the comparator U10 is grounded, a positive input terminal of the comparator U10 is connected between the eleventh resistor R11 and the twelfth resistor R12, and an output terminal of the comparator U10 is connected to a gate of the second field effect transistor Q2 through the thirteenth resistor R13; the fourteenth resistor R14 is connected in parallel between the output end and the voltage input end of the comparator U10; the fifteenth resistor R15 is connected in parallel between the output terminal and the positive input terminal of the comparator U10.
For example, referring to fig. 3 and 4, the self-starting circuit 13 includes: a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, an eighth capacitor C8, a ninth capacitor C9, a fifth zener diode Z5, a first NPN triode Q5 and a second NPN triode Q4; a first end of the sixteenth resistor R16 is connected between the eighth resistor R8 and the second voltage output port Vout2, and a second end of the sixteenth resistor R16 is grounded to the seventeenth resistor R17 through a fifth zener diode Z5 in sequence; a first end of the eighth capacitor C8 is connected to a first end of the sixteenth resistor R16, and a second end of the eighth capacitor C8 is grounded; a first end of the eighteenth resistor R18 is connected to a first end of the sixteenth resistor R16, a second end of the eighteenth resistor R18 is connected to a collector of the first NPN transistor Q5, a base of the first NPN transistor Q5 is connected between the fifth zener diode Z5 and the seventeenth resistor R17, and an emitter of the first NPN transistor Q5 is grounded; the ninth capacitor C9 is connected in parallel with the seventeenth resistor R17; a base of the second NPN transistor Q4 is connected between the collector of the first NPN transistor Q5 and the eighteenth resistor R18, an emitter of the second NPN transistor Q4 is grounded, and a collector of the second NPN transistor Q4 is connected between the drain of the second field effect transistor Q2 and the eighth resistor R8.
Wherein the Q1 is controlled by the V-GATE signal to switch continuously, so as to charge the sixth capacitor C6 through V-DRAIN. When Q1 is turned off, the sixth capacitor C6 is charged through the first schottky diode SBD 1. The first schottky diode SBD1 functions to prevent the sixth capacitor C6 from discharging from Q1 when Q1 is closed.
The power output circuit 11 outputs power when the lamp is turned off, wherein, as an example, 13V is the voltage across the sixth capacitor C6. The fourth zener diode Z4 is used to provide 5.1V to the rear comparator U10. The eighth resistor R8 is a current limiting resistor, which limits the current of the fourth zener diode Z4 and the 5.1V power supply.
In the hysteresis comparator circuit 12, both the eleventh resistor R11 and the twelfth resistor R12 form a voltage dividing circuit and set a threshold value of the comparator U10, when the voltage 13V across the sixth capacitor C6 is divided by the ninth resistor R9 and the tenth resistor R10 and then is lower than the threshold value, the comparator U10 outputs a high level, and the Q3 outputs a V-GATE signal to turn off the Q1 and charge the sixth capacitor C6. When the voltage across the sixth capacitor C6 reaches the target, the charging is stopped.
In the self-starting circuit 13, when the power-on starts, before the voltage across the sixth capacitor C6 is lower than 5.1V, Q4 is turned on, Q5 is turned off, and at this time, because Q4 is turned on and V-GATE is grounded, Q1 is forced to be turned off to charge the sixth capacitor C6; when the voltage across the sixth capacitor C6 is higher than 5.1V, the fifth zener diode Z5 breaks down, the Q5 is turned on, the Q4 is turned off, the V-GATE is pulled up and controlled by the Q3, and the self-starting circuit 13 no longer controls the V-GATE.
When the lamp is turned off, the relay SW1 is switched off, no input is available, and the lamp-on power-taking module does not work completely. When the lamp is turned on, the C6 is charged by controlling the on-off of the Q1. When the Q1 is switched on, the C6 cannot be charged, and the control module is powered by the charge stored in the C6; when Q1 is off, a voltage differential is created across Q1 to charge C6 to replenish the charge consumed by the control module 3.
In this embodiment, the switching frequency of the switch Q1 may be reduced by using a hysteretic comparator circuit.
In addition, the signal input for the hysteresis comparison is Vout4, the signal output is connected to the base of Q2, and the power input is Vout 7. Wherein Vout2 is: the power supply of the self-starting module is obtained from Vout 4; vout4 is: the output voltage of the power-on and power-off module is switched on; vout5 is: an output voltage to power the comparator U10 module; vout7 is: the power supply input voltage of the comparator U10 module is obtained from Vout 5; vout6 is: the comparison reference voltage of the comparator U10 module is obtained from Vout 5.
As an improvement of the above scheme, the light-on power-taking module 1 further includes: a ninth capacitor C9 and a tenth capacitor C10; both the ninth capacitor C9 and the tenth capacitor C10 are connected in parallel between the source and gate of the first field effect transistor Q1. The ninth capacitor C9 and the tenth capacitor C10 function to reduce the switching speed of the transistor, thereby reducing the electromagnetic interference to the circuit.
As an improvement of the above scheme, the light-on power-taking module 1 further includes: a second schottky diode SBD2, the second schottky diode SBD2 being connected in parallel between the source and drain of the first field effect transistor Q1. When Q1 is turned off and the current direction is from its source to drain, the second schottky diode SBD2 turns on, providing a current path that prevents the bulk current from flowing entirely through the body diode of Q1.
As an improvement of the above scheme, the light-on power-taking module 1 further includes: an eleventh capacitance C11; the eleventh capacitor C11 is connected in parallel between the source and the gate of the second field effect transistor Q2. The eleventh capacitor C11 functions to reduce the switching speed of the transistor, thereby reducing electromagnetic interference to the circuit.
As an improvement of the above solution, referring to fig. 1, the single fire switch circuit further includes a second relay SW2 and a second load port L out2, the second load port L out2 is used for being connected with a zero line through a load, an input end of the second relay SW2 is connected with the fire line port L in, an output end of the second relay SW2 is connected with the second load port L out2, a controlled end of the second relay SW2 is connected with a second control end of the control module 3, and the control module 3 is further used for controlling the opening and closing of the second relay SW2 according to a control command.
In the embodiment of the invention, the L out2 secondary circuit does not participate in power taking, the on-off of the secondary circuit is controlled only by the second relay SW2, and the secondary circuit is not electrically connected with the power taking module, so that the problem of lamp flicker does not exist in the L out2 path, and the use experience of the path is ensured.
Another embodiment of the present invention provides a single live switch device, including the single live switch circuit according to any one of the above embodiments.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A single fire switch circuit, comprising: the device comprises a fire wire port, a first load port, a lamp turning-on electricity taking module, a lamp turning-off electricity taking module, a first relay and a control module;
the fire wire port is used for being connected with a fire wire;
the first load port is used for being connected with a zero line through a load;
the control module is used for controlling the opening and closing of the first relay according to a control instruction;
the lamp turning-off and power taking module is used for supplying power to the control module when the first relay is switched off and stopping supplying power to the control module when the first relay is switched on;
the lamp turning-on and power taking module is used for supplying power to the first load port and the control module when the first relay is closed and stopping supplying power to the first load port and the control module when the first relay is disconnected;
the live wire port is connected with the live wire end of the light-on electricity-taking module, the null wire end of the light-on electricity-taking module is connected with the first input end of the first relay, and the output end of the first relay is connected with the first load port; the live wire end of the lamp turning-off electricity taking module is connected with the live wire port, and the zero line end of the lamp turning-off electricity taking module is connected with the first load port; the first control end of the control module is connected with the controlled end of the first relay, the first power end of the control module is connected with the power supply end of the power taking module when the lamp is turned on, and the second power end of the control module is connected with the power supply end of the power taking module when the lamp is turned off.
2. The single fire switch circuit of claim 1, wherein the lamp power-off module comprises: the device comprises a first fire wire port, a first zero wire port, a surge protection circuit, a rectifying circuit, an AC-DC voltage reduction circuit and a fuse;
the first fire wire port is connected with the fire wire port and is connected with the input end of the surge protection circuit; the output end of the surge protection circuit is connected with the first input end of the rectifying circuit, the output end of the rectifying circuit is connected with the input end of the AC-DC voltage reduction circuit, the power supply end of the AC-DC voltage reduction circuit is connected with the second power supply end of the control module, and the second input end of the rectifying circuit is connected with the first zero line port through the fuse; the first neutral port is connected with the first load port.
3. The single fire switch circuit of claim 2,
the surge protection circuit includes: a first resistor and a first voltage dependent resistor; the first end of the first resistor is connected with the first fire wire port, and the second end of the first resistor is connected with the first input end of the rectifying circuit; the first end of the first piezoresistor is connected between the input port and the first resistor, and the second end of the piezoresistor is connected with the output port through the fuse;
the rectifier circuit includes: a first diode, a second diode, a third diode and a fourth diode; the cathode of the first diode is connected with the anode of the second diode, the cathode of the second diode is connected with the cathode of the third diode, the anode of the third diode is connected with the cathode of the fourth diode, and the anode of the fourth diode is connected with the anode of the first diode; the output end of the surge protection circuit is connected between the cathode of the first diode and the anode of the second diode, the input end of the AC-DC voltage reduction circuit is connected between the anode of the fourth diode and the anode of the first diode, and the output port is connected between the anode of the third diode and the cathode of the fourth diode through the fuse;
the AC-DC buck circuit includes: the circuit comprises a power supply chip, a transformer, an optocoupler, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth diode, a first voltage stabilizing diode, a reference voltage source and a first voltage output port; the transformer has a first primary winding, a second primary winding and a first secondary winding; the first end of the first primary winding is connected with the output end of the rectifying circuit, the second end of the first primary winding is connected with the D pin of the power chip, the FB pin of the power chip is connected with the emitter of the NPN light receiver of the optical coupler, and the BP pin of the power chip is connected with the collector of the NPN light receiver of the optical coupler; the first end of the first capacitor is connected between the output end of the rectifying circuit and the first end of the first primary winding, and the second end of the first capacitor is grounded; four S pins of the power supply chip are connected between the second end of the first capacitor and the ground; the second capacitor is connected in parallel between the four S pins and the BP pin; the first end of the second primary winding is grounded with the third capacitor through the fifth diode in sequence, and the second end of the second primary winding is grounded; a first end of the second resistor is connected with the BP pin, and a second end of the second resistor is connected between the fifth diode and the third capacitor; the first end of the secondary winding is connected with the anode of a light emitter of the optical coupler through the first voltage stabilizing diode, the second end of the secondary winding is grounded, the cathode of the light emitter is connected with the first end of the reference voltage source through the third resistor, the second end of the reference voltage source is grounded, one end of the fourth resistor is connected between the third resistor and the first end of the reference voltage source, and the other end of the fourth resistor is connected with the third end of the reference voltage source; one end of the fourth capacitor is connected between the first voltage-stabilizing diode and the anode of the light emitter of the optocoupler, and the other end of the fourth capacitor is grounded; the first voltage output port is connected with the anode of a light emitter of the optocoupler and is also connected with a second power supply end of the control module.
4. The single fire switch circuit according to any one of claims 2 to 3, wherein the lamp-off power-taking module further comprises: a fifth resistor, a sixth resistor and a second zener diode; the fifth resistor, the sixth resistor and the second voltage stabilizing diode are connected in parallel and connected between the first rectifying output end of the rectifying circuit and the input end of the AC-DC voltage reducing circuit.
5. The single fire switch circuit of claim 1, wherein the light-on power-taking module comprises: the power supply comprises a first field effect transistor, a second field effect transistor, a power supply output circuit used for providing power supply for the control module when the first relay is closed, a hysteresis comparator circuit, a self-starting circuit, a seventh resistor and a second voltage output port;
the source electrode of the first field effect transistor is connected with the fire wire port and grounded, the drain electrode of the first field effect transistor is connected with the first input end of the first relay, the drain electrode of the first field effect transistor is also connected with the input end of the power output circuit, the power supply end of the power output circuit is connected with the first power supply end of the control module, the output end of the power output circuit is connected with the input end of the hysteresis comparator circuit, the output end of the hysteresis comparator circuit is connected with the grid electrode of the second field effect transistor, the drain electrode of the second field effect transistor is connected with the second voltage output port through the seventh resistor, and the source electrode of the second field effect transistor is grounded; the grid electrode of the first field effect transistor is connected between the drain electrode of the second field effect transistor and the seventh resistor;
one end of the self-starting circuit is connected between the seventh resistor and the second voltage output port, and the other end of the self-starting circuit is connected between the drain electrode of the second field effect transistor and the seventh resistor; the self-starting circuit is used for controlling the voltage between the drain electrode of the second field effect transistor and the seventh resistor to be 0 when the single fire switch circuit is powered on, and stopping controlling the voltage between the drain electrode of the second field effect transistor and the seventh resistor after the power output circuit outputs a preset voltage.
6. The single fire switch circuit of claim 5,
the power output circuit includes: the first Schottky diode, the fourth voltage stabilizing diode, the fourth voltage output port, the fifth voltage output port, the sixth capacitor and the eighth resistor; the first schottky diode is connected between the drain electrode of the first field effect transistor and the input end of the hysteresis comparator circuit, the fourth voltage output port is connected between the first schottky diode and the input end of the hysteresis comparator circuit, and the fourth voltage output port is also connected with the first power supply end of the control module; one end of the sixth capacitor is connected between the first Schottky diode and the input end of the hysteresis comparator circuit, and the other end of the sixth capacitor is grounded; a first end of the eighth resistor is connected between the first schottky diode and the input end of the hysteresis comparator circuit, and a second end of the eighth resistor is grounded through the fourth zener diode; the fifth voltage output port is connected between the second end of the eighth resistor and the fourth zener diode;
the hysteresis comparator circuit includes: a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixth voltage output port, a seventh voltage output port, and a comparator; the output end of the power output circuit is grounded through the ninth resistor and the tenth resistor in sequence, and the sixth voltage output port is grounded through the eleventh resistor and the twelfth resistor in sequence; a negative input end of the comparator is connected between the ninth resistor and the tenth resistor, a voltage input end of the comparator is connected with the seventh voltage output port, a grounding end of the comparator is grounded, a positive input end of the comparator is connected between the eleventh resistor and the twelfth resistor, and an output end of the comparator is connected with a gate of the second field effect transistor through the thirteenth resistor; the fourteenth resistor is connected in parallel between the output end and the voltage input end of the comparator; the fifteenth resistor is connected in parallel between the output end and the positive input end of the comparator;
the self-starting circuit comprises: a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, an eighth capacitor, a ninth capacitor, a fifth zener diode, a first NPN triode, and a second NPN triode; a first end of the sixteenth resistor is connected between the eighth resistor and the second voltage output port, and a second end of the sixteenth resistor is grounded with the seventeenth resistor through a fifth voltage-stabilizing diode in sequence; a first end of the eighth capacitor is connected with a first end of the sixteenth resistor, and a second end of the eighth capacitor is grounded; a first end of the eighteenth resistor is connected with a first end of the sixteenth resistor, a second end of the eighteenth resistor is connected with a collector of the first NPN triode, a base of the first NPN triode is connected between the fifth voltage regulator diode and the seventeenth resistor, and an emitter of the first NPN triode is grounded; the ninth capacitor is connected with the seventeenth resistor in parallel; the base electrode of the second NPN triode is connected between the collector electrode of the first NPN triode and the eighteenth resistor, the emitter electrode of the second NPN triode is grounded, and the collector electrode of the second NPN triode is connected between the drain electrode of the second field effect transistor and the eighth resistor.
7. The single fire switch circuit according to claim 5 or 6, wherein the light-on power-taking module further comprises: a ninth capacitor and a tenth capacitor; the ninth capacitor and the tenth capacitor are both connected in parallel between the source and the gate of the first field effect transistor;
or, turn on light and get electric module still includes: a second Schottky diode connected in parallel between the source and the drain of the first field effect transistor;
or, turn on light and get electric module still includes: an eleventh capacitance; the eleventh capacitor is connected in parallel between the source and the gate of the second field effect transistor.
8. The single fire switch circuit of claim 6 wherein said sixth capacitor is a polypropylene capacitor.
9. The single fire switch circuit of claim 1 further comprising a second relay and a second load port; the second load port is used for being connected with a zero line through a load; the input end of the second relay is connected with the fire wire port, the output end of the second relay is connected with the second load port, and the controlled end of the second relay is connected with the second control end of the control module; the control module is further used for controlling the second relay to be opened and closed according to a control instruction.
10. A single fire switching device comprising a single fire switching circuit as claimed in any one of claims 1 to 9.
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