CN212034395U - Bluetooth directly links sky cat or zigbee intelligence wall switch single control circuit - Google Patents
Bluetooth directly links sky cat or zigbee intelligence wall switch single control circuit Download PDFInfo
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- CN212034395U CN212034395U CN202020538476.1U CN202020538476U CN212034395U CN 212034395 U CN212034395 U CN 212034395U CN 202020538476 U CN202020538476 U CN 202020538476U CN 212034395 U CN212034395 U CN 212034395U
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Abstract
The utility model relates to a wall switch single control circuit, especially single live wire bluetooth directly link sky cat or zigbee intelligence wall switch single control circuit. The utility model discloses wall switch single control circuit includes thyristor or relay main switch and drive circuit, direct current voltage stabilizing circuit, step-down chopper circuit, capacitanc touch-control circuit, LED state indicating circuit and bluetooth or zigbee modular circuit. The direct current power supply system has scientific circuit design and small standby current, so that the phenomenon of 'ghost fire' after the small LED lamp is turned off is avoided; because the step-down chopper circuit is inserted into the direct current power supply, the load carrying capacity is obviously improved, the technical problem that the small LED lamp cannot be distributed with a Bluetooth or zigbee module circuit and a relay cannot carry a low-power load is effectively solved, and the application range of the intelligent switch is greatly expanded.
Description
Technical Field
The utility model relates to a wall switch single control circuit, especially single live wire bluetooth directly link sky cat or zigbee intelligence wall switch single control circuit.
Background
With the rapid development of science and technology, smart homes gradually enter all households, particularly, Bluetooth directly-connected-to-heaven cat or zigbee smart wall switch appears in the near future, and the voice control and mobile phone app remote control are adopted, so that great convenience and fun are brought to users, and the smart home is deeply popular with the majority of users, especially young people. But the following drawbacks generally exist in the current intelligent wall switch: 1. in a standby state, the static current is too large, so that a low-power lamp cannot be completely turned off, and weak light still exists in the turn-off state, which is commonly called as 'ghost fire'; 2. the load capacity is poor, and the existing wall switch circuit of the low-power lamp cannot be distributed with a network because the Bluetooth circuit and the zigbee circuit need certain working current; 3. the relay cannot be provided with a low-power lamp, so that the application range of the lamp is influenced; 4. the thyristor trigger circuit is unreliable and easy to damage; 5. poor anti-interference ability and easy misoperation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art existence, provide a standby current little and take the bluetooth of load capacity reinforce directly even sky cat or zigbee intelligence wall switch single control circuit.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a bluetooth is direct even day cat or zigbee intelligence wall switch single control circuit, includes main loop and the main switch element, main switch drive circuit, direct current constant voltage power supply circuit and the touch of electric capacity and the bluetooth output circuit of establishing in the main circuit of cluster, the both ends of main loop are the live wire link end of being connected with the live wire and the load link end of being connected with the load respectively, direct current constant voltage power supply circuit provides working power supply for main switch drive circuit and electric capacity touch and bluetooth output circuit, main switch drive circuit control the break-make of main switch element, its characterized in that: the direct current stabilized power supply circuit comprises a single-ended flyback switching power supply circuit and two groups of rectification filtering stabilized power supply circuits with one high and one low, the input alternating voltage between the live wire connecting end and the load connecting end is used as the power supply of the single-end flyback switching power supply circuit after being subjected to bridge rectification, the secondary winding of the transformer T1 in the single-ended flyback switching power supply circuit is a center-tapped secondary winding, the output of the secondary coil of the transformer T1 is rectified and filtered by a first rectifying diode VD2 and a filter capacitor C3 to be used as a high dc power supply voltage VCC1 to supply power to a dc power supply system, the center tap output of the secondary coil of the transformer T1 is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal regulator, and then is used as low direct-current power supply voltage VCC3 to provide power for a control circuit and a driving circuit.
As a further arrangement of the present invention, the single-ended flyback switching power supply circuit includes a single-phase rectifier circuit DS1, a filter inductor L1, a filter capacitor C2, a positive feedback resistor R6, a positive feedback capacitor C6, a second photocoupler OP2, a second switching MOS V2, a first upper bias resistor R4, a first lower bias resistor R5, and a transformer T1, wherein an input ac voltage between the live line connection terminal Lin and the load connection terminal L1 is rectified by a current-limiting resistor R2, a single-phase rectifier circuit DS1, and filtered by an LC filter unit composed of a filter inductor L1 and a filter capacitor C2 to serve as a power supply of the single-ended flyback switching power supply circuit, a primary coil of the transformer T1 is connected between a positive power supply terminal and a ground terminal of the single-ended flyback switching power supply circuit through a drain electrode and a source electrode of the second switching MOS transistor V2, the first upper bias resistor R4 is connected between a positive electrode of the single-ended flyback switching power supply circuit and a gate electrode of the second switching MOS switch power supply circuit V2, the first lower bias resistor R5 is connected to the gate of the second switching MOS transistor V2 and the power ground of the single-ended flyback switching power supply circuit, and the feedback voltage of the positive feedback coil of the transformer T1 is input to the gate of the second switching MOS transistor V2 through a positive feedback branch composed of the positive feedback resistor R6 and the positive feedback capacitor C6; the center tap output of a secondary coil of a transformer T1 in the single-ended flyback switching power supply circuit is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal regulator to be used as low direct-current power supply voltage VCC 3; the output of the secondary coil of the transformer T1 is rectified and filtered by a first rectifying diode VD2 and a filter capacitor C3 to be used as a high dc power supply voltage VCC1, and a charging diode VD1 is connected between the cathode of the threshold voltage stabilizing diode VZ1 and the high dc power supply voltage VCC 1; the output of a center tap of a secondary coil of the transformer T1 is connected with a power ground end through a diode D4, a current-limiting resistor R16 and the input end of a second photoelectric coupler OP2, and the output end of the second photoelectric coupler OP2 is connected with the grid of the second switch MOS tube V2 and the power ground end of the single-ended flyback switch power circuit to form a voltage-stabilizing control circuit.
As a further setting of the utility model, be provided with step-down direct current chopping and chopping drive circuit between high direct current power supply voltage VCC1 anodal and three terminal regulator's input VCC2, wall switch single control circuit still is equipped with the blockade circuit of oscillation, blockade circuit of oscillation input with electric capacity touch and bluetooth output circuit's output are connected, blockade circuit of oscillation input and step-down direct current chopping and chopping drive circuit's input, control chopping pulse generating circuit.
As the utility model discloses a further setting, step-down direct current chopping and chopping drive circuit includes step-down direct current chopping unit, chopping pulse generating unit and pulse blocking circuit unit, the output control of pulse blocking circuit unit the chopping pulse output of chopping pulse generating unit, the chopping pulse control of chopping pulse generating unit output step-down direct current chopping unit.
As a further configuration of the present invention, the step-down dc chopper unit includes a first switch tube V3, a second switch tube V4, a second upper bias resistor R6, a second lower bias resistor R7, a differential resistor R8, a differential capacitor C8, a freewheeling diode VD4, a smoothing inductor L2, and a third inverter, the first switch tube V3 is a P-channel MOS tube, the second switch tube V4 is an N-channel MOS tube, the source of the first switch tube V3 is connected to the positive terminal of a high dc power supply voltage VCC1, the drain of the first switch tube V3 is connected to the input terminal VCC2 of the three-terminal regulator through the smoothing inductor L2, the gate of the first switch tube V3 is connected to the ground terminal of the three-terminal regulator through the second lower bias resistor R7, the drain of the second switch tube V4, the source is connected to the ground terminal of the dc power supply, the second upper bias resistor R6 is connected in parallel to the source of the first switch tube V3, and the differential resistor R5928 is connected to the first switch tube C3, the other end of the third inverter is connected with the input end of a third inverter, the output end of the third inverter is connected with the grid electrode of a second switching tube V4, and the input end of the third inverter is the chopping pulse input end of the step-down direct current chopping unit.
As a further setting of the utility model, the chopping pulse generating unit includes first oscillating resistance R9, second oscillating resistance R10, oscillating diode VD5, oscillating capacitor C9, first inverter, second inverter, the output of first inverter with the input of second inverter is connected, the output of second inverter with the input of third inverter is connected, first oscillating resistance R9 and second oscillating resistance R10 and oscillating diode VD 5's series branch are parallelly connected between the input of first inverter and the output, oscillating capacitor C9 is connected between the output of first inverter and dc power supply's ground, the input of first inverter is the control signal input of chopping pulse generating unit.
As the utility model discloses a further setting, the oscillation blockade circuit is including blockading diode VD6, blockading triode V5, blockade resistance R11, and oscillation opening resistance R12, blockade resistance R11 connects between low DC power supply voltage VCC 3's positive pole and ground end through blockading triode V5 collecting electrode, projecting pole, blockade diode VD6 positive pole is connected blockade on triode V5's the collecting electrode, the negative pole conduct oscillation blockade circuit's control signal output part, oscillation opening resistance R12 one end is connected with blockade triode V5's base, and the other end is connected with electric capacity touch and bluetooth output circuit's output.
As a further setting of the utility model, be provided with zener diode VZ2 between high dc power supply voltage VCC1 anodal and three terminal regulator's input VCC 2.
As a further configuration of the present invention, the main switch element is a bidirectional thyristor VT1, the main switch driving circuit includes a first current-limiting resistor R2, a second current-limiting resistor R3, a first photocoupler OP1, a first switch MOS transistor V1, a threshold voltage-stabilizing diode VZ1, an anti-interference capacitor C1, and an anti-interference resistor R1, the anti-interference capacitor C1 and the anti-interference resistor R1 are connected in parallel between the second anode and the gate of the bidirectional thyristor VT1, and a series branch of the first current-limiting resistor R2, the first photocoupler OP1 output, and the threshold voltage-stabilizing diode VZ1 is connected in parallel between the live wire connection end and the gate of the bidirectional thyristor VT 1; the second current-limiting resistor R3 is connected with the input end of a first photoelectric coupler OP1 and the input end of a first switch MOS tube V1 in series at the two ends of the low direct-current power supply voltage VCC3, and the output end of the capacitance touch and Bluetooth output circuit is connected with the grid electrode of the first switch MOS tube V1 to form the main switch driving circuit.
As a further configuration of the present invention, the main switch element is a relay K1, a third switch tube V7 and a fourth switch tube V8, the source electrodes of the third switch tube V7 and the fourth switch tube V8 are connected and then connected to the ground of the dc regulated power supply circuit, and the normally open contact K1-1 of the relay K1 is connected between the live wire connection end and the load connection end through a series branch after the drain electrodes of the third switch tube V7 and the fourth switch tube V8 are connected to form the main circuit;
the main switch driving circuit comprises a fifth switching tube V9, a sixth switching tube V10, a seventh switching tube V11 and a discharge resistor R16, wherein the source electrode of the fifth switching tube V9 is connected with the positive electrode output end VCC4 of the step-down direct-current chopper unit, the source electrode is connected with the input end VCC2 of the three-terminal voltage regulator through a current-limiting resistor R18, the discharge resistor R16 is connected between the source electrode and the grid electrode of the fifth switching tube V9 in parallel, and the grid electrode of the fifth switching tube V9 is connected with the ground end of the direct-current stabilized power supply circuit through the drain electrode and the source electrode of the sixth switching tube V10; a coil of the relay K1 is connected between the positive output end VCC4 and the ground end of the buck direct-current chopper unit through the drain and the source of a seventh switching tube V11; a static power supply resistor R15 is bridged between the positive electrode of the high direct-current power supply voltage VCC1 and the positive electrode output end VCC4 of the step-down direct-current chopper unit;
a conducting state DC voltage stabilizing circuit is also arranged, the conducting state DC voltage stabilizing circuit comprises a voltage sampling voltage-regulator tube DZ1, a current-limiting resistor R13, a voltage-stabilizing control triode V6, a time-delay resistor R14, a time-delay capacitor C10 and a fourth inverter, the negative electrode of the voltage sampling voltage-stabilizing tube DZ1 is connected with the positive electrode of a high DC power supply voltage VCC1, the positive electrode is connected with the base electrode of the voltage-stabilizing control triode V6 through a current-limiting resistor R13, the delay capacitor C10 is connected in parallel with the collector and the emitter of the voltage-stabilizing control triode V6, the input end of the fourth inverter is connected with the collector of a voltage-stabilizing control triode V6, the grid electrodes of the third switching tube V7 and the fourth switching tube V8 are connected and then connected with the output end of the fourth inverter, one end of the delay resistor R14 is connected with the collector of the voltage-stabilizing control triode V6, and the other end is connected with the anode of the low direct-current power supply voltage VCC 3.
Compared with the prior art, the Bluetooth direct-connected Tianmao or zigbee intelligent wall switch single-control circuit adopts a single-ended flyback switching power supply circuit as the direct-current voltage stabilizing power supply circuit, and the secondary coil of the transformer T1 in the single-end flyback switching power supply circuit is selected as the secondary coil with a center tap, the output of the secondary coil of the transformer T1 is rectified and filtered by a first rectifying diode VD2 and a filter capacitor C3 to be used as a high dc power supply voltage VCC1 to supply power to a dc power supply system, the center tap output of the secondary coil of the transformer T1 is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal regulator to be used as a low direct-current power supply voltage VCC3 to provide power for a control circuit and a driving circuit, so as to provide enough current to provide working power for the capacitance touch and Bluetooth output circuit under the condition of using small power and the like.
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic diagram of a main switch driving circuit and a dc voltage-stabilized power supply circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a voltage-reducing dc chopper and chopper driving circuit according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a three-main-switch driving circuit and a DC stabilized voltage power supply circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the capacitive touch and bluetooth (or zigbee) output circuit of the present invention.
Detailed Description
The utility model discloses direct sky cat of linking of bluetooth or zigbee intelligence wall switch single control circuit includes that main circuit and cluster establish main switch element, main switch drive circuit, direct current constant voltage power supply circuit and electric capacity touch and bluetooth (or zigbee) output circuit in the main circuit. The two ends of the main circuit are respectively a live wire connecting end Lin connected with a live wire and a load connecting end L1 connected with a load, the direct-current stabilized voltage power supply circuit provides a working power supply for the main switch driving circuit and the capacitance touch and Bluetooth output circuit, the main switch driving circuit controls the on-off of the main switch element so as to switch on or off the main circuit and provide current or cut off current for the load (such as an LED lamp), and the main switch element can be a non-contact electronic switch element or a relay with a mechanical contact. The direct current stabilized power supply circuit comprises a single-ended flyback switching power supply circuit and two groups of rectification filtering stabilized power supply circuits with one high and one low, the input alternating voltage between the live wire connection end Lin and the load connection end L1 is used as the power supply of the single-ended flyback switching power supply circuit after being subjected to bridge rectification, the secondary coil of the transformer T1 in the single-ended flyback switching power supply circuit is selected to be a secondary coil with a center tap, the center tap output of the secondary coil of the transformer T1 is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal voltage stabilizer to be used as a special integrated circuit in the circuit to provide a working power supply, the output of the secondary coil of the transformer T1 is rectified and filtered by a first rectifying diode VD2 and a filter capacitor C3, and then is used as a high dc power supply voltage VCC1 to provide a working power supply for the rest of the circuit. The present invention will be further described with reference to the following specific embodiments.
Detailed description of the preferred embodiment
As shown in fig. 1, the bluetooth direct-connected heaven or zigbee intelligent wall switch single control circuit in this embodiment includes a main circuit, and a main switch element, a main switch driving circuit, a dc voltage-stabilized power circuit, and a capacitive touch and bluetooth (or zigbee) output circuit serially connected in the main circuit. The direct current stabilized power supply circuit comprises a single-ended flyback switching power supply circuit and two groups of rectification filtering stabilized power supply circuits, namely a high group and a low group; the single-ended flyback switching power supply circuit comprises a single-phase rectification circuit DS1, a filter inductor L1, a filter capacitor C2, a positive feedback resistor R6, a positive feedback capacitor C6, a second photoelectric coupler OP2, a second switching MOS transistor V2, a first upper bias resistor R4, a first lower bias resistor R5 and a transformer T1, wherein an input alternating current voltage between a live wire connection end Lin and a load connection end L1 is rectified by a current-limiting resistor R2, a single-phase rectification circuit DS1 and filtered by an LC filter unit consisting of a filter inductor L1 and a filter capacitor C2 to serve as a power supply of the single-ended flyback switching power supply circuit, a primary coil of the transformer T1 is connected between the positive power supply electrode and the ground terminal of the single-ended flyback switching power supply circuit through the drain electrode and the source electrode of the second switching MOS transistor V2, the first upper bias resistor R4 is connected between the positive power supply electrode of the single-ended flyback switching power supply circuit and the grid electrode of the second switching MOS transistor V2, the first lower bias resistor R5 is connected to the gate of the second switching MOS transistor V2 and the power ground of the single-ended flyback switching power supply circuit, and the feedback voltage of the positive feedback coil of the transformer T1 is input to the gate of the second switching MOS transistor V2 through a positive feedback branch formed by the positive feedback resistor R6 and the positive feedback capacitor C6.
A secondary coil of a transformer T1 in the single-ended flyback switching power supply circuit is a secondary coil with a center tap, and the center tap output of the secondary coil of the transformer T1 is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal regulator to serve as a low direct-current power supply voltage VCC3 to provide a working power supply for a capacitor touch and Bluetooth (or zigbee) output circuit; the output of the secondary coil of the transformer T1 is rectified and filtered by a first rectifying diode VD2 and a filter capacitor C3, and then is used as a high dc power supply voltage VCC1 to provide a working power supply for the rest of the circuit, and a charging diode VD1 is further connected between the cathode of the threshold voltage stabilizing diode VZ1 and the high dc power supply voltage VCC1, in this specific embodiment, the high dc power supply voltage VCC1 is 11V when no load, and is determined by the transformation ratio of the transformer T1, and the switch on state is 12V, and is determined by the threshold voltage stabilizing diode VZ 1; three terminal regulator's input VCC2 sets for 4V, and three terminal regulator's the low DC power supply voltage VCC3 of output sets for 3V, and voltage no-load loss is little like this, and the condition of slightly shining can not appear in the miniwatt lamp, can satisfy low dropout three terminal regulator's requirement simultaneously.
The output of a center tap of a secondary coil of the transformer T1 is connected with a power ground end through a diode D4, a current-limiting resistor R16 and the input end of a second photoelectric coupler OP2, the second photoelectric coupler OP2 is preferably a zero-voltage thyristor optical coupler, and the output end of the second photoelectric coupler OP2 is connected with the grid of a second switch MOS tube V2 and the power ground end of the single-ended flyback switch power circuit to form a voltage-stabilizing control circuit.
The two ends of the main loop are respectively a live wire connecting end Lin connected with a live wire and a load connecting end L1 connected with a load, the main switch element is a bidirectional thyristor VT1, the main switch driving circuit comprises a first current-limiting resistor R2, a second current-limiting resistor R3, a first photoelectric coupler OP1, a first switch MOS transistor V1, a threshold voltage-stabilizing diode VZ1, an anti-interference capacitor C1 and an anti-interference resistor R1, the anti-interference capacitor C1 and the anti-interference resistor R1 are connected between a second anode and a gate of the bidirectional thyristor VT1 in parallel, a series branch of the current-limiting resistor R2, an output end of the first photoelectric coupler OP1 and the threshold voltage-stabilizing diode VZ1 is connected between the live wire connecting end Lin and the gate of the bidirectional thyristor VT1 in parallel, and the first photoelectric coupler 1 is preferably a zero-voltage type thyristor OP.
The second current-limiting resistor R3 is connected with the input end of the first photoelectric coupler OP1 and the first switch MOS tube V1 in series and then connected with the two ends of the low direct-current power supply voltage VCC3, and the amplifying circuit formed by connecting the output end of the capacitance touch and Bluetooth (or zigbee) output circuit and the grid electrode of the first switch MOS tube V1 forms the main switch driving circuit.
The capacitive touch and bluetooth (or zigbee) output circuit is composed of a dedicated touch bistable flip-flop integrated circuit U4, a bluetooth (or zigbee) dedicated integrated circuit U5 and peripheral components, as shown in fig. 4, when the touch sheet M has a touch signal, the output levels of the corresponding output terminals (U1-U3) on the bluetooth (or zigbee) dedicated integrated circuit U5 are inverted.
In order to ensure sufficient dc supply current of the switch conducting state control power supply, on the basis of the first embodiment, a zener diode VZ2 is preferably disposed between the positive electrode of the high dc supply voltage VCC1 and the input terminal VCC2 of the three-terminal regulator, and in this embodiment, the regulated voltage value of the zener diode VZ2 is selected to be 7.5V.
Detailed description of the invention
In order to further adapt to the use of miniwatt lamp for the circuit still can do when using the miniwatt lamp electric capacity touch and bluetooth (or zigbee) output circuit provide sufficient operating current, the utility model discloses the circuit can be on specific embodiment one's basis, in set up step-down direct current chopping and chopping drive circuit between high DC power supply voltage VCC1 anodal and three terminal regulator's input VCC2, wall switch single control circuit still is equipped with the blockade circuit of oscillation, blockade circuit input with electric capacity touch and bluetooth output circuit's output is connected, the blockade circuit of oscillation input and step-down direct current chopping and chopping drive circuit's input, control chopping pulse generating circuit.
As shown in fig. 2, in this embodiment, the step-down dc chopping and chopping drive circuit includes a step-down dc chopping unit, a chopping pulse generating unit, and a pulse blocking circuit unit, wherein an output of the pulse blocking circuit unit controls a chopping pulse output of the chopping pulse generating unit, and a chopping pulse output by the chopping pulse generating unit controls the step-down dc chopping unit; the input end of the pulse blocking circuit unit is connected with the output end of the capacitance touch and Bluetooth (or zigbee) output circuit.
The step-down direct current chopper unit comprises a first switch tube V3, a second switch tube V4, a second upper bias resistor R6, a second lower bias resistor R7, a differential resistor R8, a differential capacitor C8, a freewheeling diode VD4, a flat wave inductor L2 and a third inverter, wherein the first switch tube V3 is a P-channel MOS tube, the second switch tube V4 is an N-channel MOS tube, the source of the first switch tube V3 is connected with the anode of a high direct current power supply voltage VCC1, the drain of the first switch tube V3 is connected with the input end VCC2 of a three-terminal regulator through the flat wave inductor L2, the gate of the first switch tube V3 is connected with the source of a direct current power supply through the second lower bias resistor R7, the drain of the second switch tube V4 and the drain of the first switch tube V6 in parallel connection with the source and the gate of the first switch tube V3, the differential resistor R8 is connected with the gate of the differential capacitor C8 in series connection with the gate of the first switch tube 3, the other end of the third inverter is connected with the input end of a third inverter, the output end of the third inverter is connected with the grid electrode of a second switching tube V4, and the input end of the third inverter is the chopping pulse input end of the step-down direct current chopping unit.
The chopping pulse generating unit comprises a first oscillating resistor R9, a second oscillating resistor R10, an oscillating diode VD5, an oscillating capacitor C9, a first inverter and a second inverter, wherein the output end of the first inverter is connected with the input end of the second inverter, the output end of the second inverter is connected with the input end of the third inverter, a series branch of the first oscillating resistor R9, the second oscillating resistor R10 and the oscillating diode VD5 is connected between the input end and the output end of the first inverter in parallel, the oscillating capacitor C9 is connected between the output end of the first inverter and the ground end of a direct-current power supply, and the input end of the first inverter is the control signal input end of the chopping pulse generating unit. After the voltage reduction direct current chopping and chopping drive circuit is arranged, the input current and voltage of the high direct current power supply voltage VCC1 are related to the chopping pulse duty ratio, the chopping pulse duty ratio output by the chopping pulse generation circuit is preferably 2.5:1-3.5:1, in the specific embodiment, the chopping pulse duty ratio output by the chopping pulse generation circuit is 3:1, when the input end VCC2 of the three-terminal regulator is set to be 4V, and the current is 12mA, the theoretical high direct current power supply voltage VCC1 is 12V, and the current is 4mA, so that the low-power lamp can easily meet the requirements.
Oscillation lockout circuit is including blockading diode VD6, blockading triode V5, blockading resistance R11, and oscillation is opened resistance R12, blockading resistance R11 connects between low DC power supply voltage VCC 3's positive pole and ground end through blockading triode V5 collecting electrode, projecting pole, blockading diode VD6 positive pole is connected on blockading triode V5's the collecting electrode, the negative pole conduct oscillation lockout circuit's control signal output end, oscillation is opened resistance R12 one end and is connected with blockading triode V5's base, and the other end (promptly pulse lockout circuit unit's input) is connected with electric capacity touch and bluetooth output circuit's output.
Detailed description of the preferred embodiment
As shown in fig. 3, the bluetooth direct-connected skyhook or zigbee smart wall switch single-control circuit in this embodiment also includes a main circuit, and a main switch element, a main switch driving circuit, a dc voltage-stabilized power circuit, and a capacitive touch and bluetooth (or zigbee) output circuit serially connected in the main circuit. The direct current stabilized power supply circuit comprises a single-ended flyback switching power supply circuit and two groups of rectification filtering stabilized power supply circuits, namely a high group and a low group; the single-ended flyback switching power supply circuit comprises a single-phase rectification circuit DS1, a filter inductor L1, a filter capacitor C2, a positive feedback resistor R6, a positive feedback capacitor C6, a second photoelectric coupler OP2, a second switching MOS transistor V2, a first upper bias resistor R4, a first lower bias resistor R5 and a transformer T1, wherein an input alternating current voltage between a live wire connection end Lin and a load connection end L1 is rectified by a current-limiting resistor R2, a single-phase rectification circuit DS1 and filtered by an LC filter unit consisting of a filter inductor L1 and a filter capacitor C2 to serve as a power supply of the single-ended flyback switching power supply circuit, a primary coil of the transformer T1 is connected between the positive power supply electrode and the ground terminal of the single-ended flyback switching power supply circuit through the drain electrode and the source electrode of the second switching MOS transistor V2, the first upper bias resistor R4 is connected between the positive power supply electrode of the single-ended flyback switching power supply circuit and the grid electrode of the second switching MOS transistor V2, the first lower bias resistor R5 is connected to the gate of the second switching MOS transistor V2 and the power ground of the single-ended flyback switching power supply circuit, and the feedback voltage of the positive feedback coil of the transformer T1 is input to the gate of the second switching MOS transistor V2 through a positive feedback branch composed of the positive feedback resistor R6 and the positive feedback capacitor C6.
A secondary coil of a transformer T1 in the single-ended flyback switching power supply circuit is a secondary coil with a center tap, and the center tap output of the secondary coil of the transformer T1 is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal regulator to serve as a low direct-current power supply voltage VCC3 to provide a working power supply for a capacitor touch and Bluetooth (or zigbee) output circuit; the output of transformer T1's secondary coil is through first rectifier diode VD2 and filter capacitor C3's rectification and filtering back as high DC power supply voltage VCC1 for the rest of circuit provides working power supply, threshold value zener diode VZ 1's negative pole with still be connected with charging diode VD1 between the high DC power supply voltage VCC1, in this embodiment, high DC power supply voltage VCC1 sets for 12V, and three-terminal regulator's input VCC2 sets for 4V, and three-terminal regulator's the low DC power supply voltage VCC3 of output sets for 3V.
The center tap output of the secondary coil of the transformer T1 is connected with the power ground end through a diode D4, a current-limiting resistor R16 and the input end of a second photoelectric coupler OP2, and the output end of the second photoelectric coupler OP2 is connected with the grid of the second switch MOS tube V2 and the power ground end of the single-ended flyback switch power circuit to form a voltage-stabilizing control circuit.
This bluetooth direct-connected tianmao or zigbee intelligence wall switch single control circuit still is equipped with step-down direct current chopping and chopping drive circuit and regards as the working power supply of main switch drive circuit. In this embodiment, the step-down dc chopping and chopping drive circuit includes a step-down dc chopping unit, a chopping pulse generating unit, and a pulse blocking circuit unit, wherein the output of the pulse blocking circuit unit controls the chopping pulse output of the chopping pulse generating unit, and the chopping pulse output by the chopping pulse generating unit controls the step-down dc chopping unit; the input end of the pulse blocking circuit unit is connected with the output end of the capacitance touch and Bluetooth (or zigbee) output circuit.
The buck direct-current chopping unit comprises a first switch tube V3, a second switch tube V4, a second upper bias resistor R6, a second lower bias resistor R7, a differential resistor R8, a differential capacitor C8, a freewheeling diode VD4, a smoothing inductor L2 and a third inverter, wherein the first switch tube V3 is a P-channel MOS tube, the second switch tube V4 is an N-channel MOS tube, the source of the first switch tube V3 is connected with the positive electrode of a high direct-current power supply voltage VCC1, the drain of the first switch tube V3 is connected with the ground end of a direct-current power supply through the smoothing inductor L2 as the output end VCC4 of the buck direct-current chopping unit, the gate of the first switch tube V3 is connected with the source and the gate of the first switch tube V3 in parallel through the second lower bias resistor R7, the drain of the second switch tube V4 and the source, the second upper bias resistor R6 is connected with one end of the differential resistor R8 in series with the gate of the first switch tube V599, the other end of the third inverter is connected with the input end of a third inverter, the output end of the third inverter is connected with the grid electrode of a second switching tube V4, and the input end of the third inverter is the chopping pulse input end of the step-down direct current chopping unit.
The chopping pulse generating unit comprises a first oscillating resistor R9, a second oscillating resistor R10, an oscillating diode VD5, an oscillating capacitor C9, a first inverter and a second inverter, wherein the output end of the first inverter is connected with the input end of the second inverter, the output end of the second inverter is connected with the input end of the third inverter, a series branch of the first oscillating resistor R9, the second oscillating resistor R10 and the oscillating diode VD5 is connected between the input end and the output end of the first inverter in parallel, the oscillating capacitor C9 is connected between the output end of the first inverter and the ground end of a direct-current power supply, and the input end of the first inverter is the control signal input end of the chopping pulse generating unit. After the voltage reduction direct current chopping and chopping driving circuit is arranged, the size of the current output by the low direct current power supply voltage VCC3 is related to the duty ratio of chopping pulses, and the duty ratio of the chopping pulses output by the chopping pulse generating circuit is preferably 1: 0.7.
The oscillation blocking circuit is arranged to avoid oscillation in an idle state to increase an idle current, and in this embodiment, the oscillation blocking circuit includes a blocking diode VD6, a blocking triode V5, a blocking resistor R11, and an oscillation opening resistor R12, the blocking resistor R11 is connected between the positive pole and the ground of the low dc power supply voltage VCC3 through the collector and the emitter of the blocking triode V5, the anode of the blocking diode VD6 is connected to the collector of the blocking triode V5, the cathode of the blocking diode is used as the control signal output end of the oscillation blocking circuit, one end of the oscillation opening resistor R12 is connected to the base of the blocking triode V5, and the other end (i.e., the input end of the pulse blocking circuit unit) is connected to the output end of the capacitive touch and bluetooth output circuit.
The two ends of the main loop are respectively a live wire connecting end Lin connected with a live wire and a load connecting end L1 connected with a load, the main switching elements are a relay K1, a third switching tube V7 and a fourth switching tube V8, the sources of the third switching tube V7 and the fourth switching tube V8 are connected and then connected with the ground end of the DC stabilized power supply circuit, a normally-open contact K1-1 of the relay K1 is connected between the live wire connecting end Lin and the load connecting end L1 through a series branch circuit formed by connecting the drains of the third switching tube V7 and the fourth switching tube V8, and the voltage between the drains of the third switching tube V7 and the fourth switching tube V8 passes through a single-phase bridge rectifier circuit DS2 to provide input power for the buck DC chopping and driving circuit; in this embodiment, only one switching tube (the third switching tube V7 or the fourth switching tube V8) may be used to form a half-wave rectification mode, but the corresponding working current will be reduced.
The main switch driving circuit comprises a fifth switching tube V9, a sixth switching tube V10, a seventh switching tube V11 and a discharge resistor R16, wherein the source electrode of the fifth switching tube V9 is connected with the positive electrode output end VCC4 of the step-down direct-current chopper unit, the source electrode is connected with the input end VCC2 of the three-terminal voltage regulator through a current-limiting resistor R18, the discharge resistor R16 is connected between the source electrode and the grid electrode of the fifth switching tube V9 in parallel, and the grid electrode of the fifth switching tube V9 is connected with the ground end of the direct-current stabilized power supply circuit through the drain electrode and the source electrode of the sixth switching tube V10; and a coil of the relay K1 is connected between the positive output end VCC4 of the step-down direct-current chopper unit and the ground end through the drain and the source of a seventh switching tube V11.
In order to ensure that power tubes such as the third switch tube V7 and the fourth switch tube V8 are not overvoltage and overheating, the Bluetooth direct-current connected Tianmao or zigbee intelligent wall switch single control circuit is further provided with a conducting state direct current voltage stabilizing circuit, the conducting state direct current voltage stabilizing circuit comprises a voltage sampling voltage stabilizing tube DZ1, a current limiting resistor R13, a voltage stabilizing control triode V6, a time delay resistor R14, a time delay capacitor C10 and a fourth inverter, the negative electrode of the voltage sampling tube DZ1 is connected with the positive electrode of a high direct current power supply voltage VCC1, the positive electrode of the voltage sampling tube DZ1 is connected with the base electrode of the voltage stabilizing control triode V6 through the current limiting resistor R13, the time delay capacitor C10 is connected with the collector electrode and the emitter electrode of the voltage stabilizing triode V6 in parallel, the input end of the fourth inverter is connected with the collector electrode of the voltage stabilizing control triode V6, the grid electrodes of the third switch tube V7 and the fourth switch tube V8 are connected with, one end of the delay resistor R14 is connected with the collector of the voltage-stabilizing control triode V6, and the other end is connected with the anode of the low direct-current power supply voltage VCC 3. With this arrangement, the conducting state is delayed for a few ms (e.g. 10 ms) and turned off, and one cycle is only turned on 2 times, thereby reducing the switching loss of the third switch tube V7 and the fourth switch tube V8.
In a specific embodiment, in order to ensure that the relay K1 is reliably turned on in the initial state, a static supply resistor R15 is preferably connected across between the positive electrode of the high dc power supply voltage VCC1 and the positive electrode output terminal VCC4 of the step-down dc chopper unit in the bluetooth direct-connected tianmao or zigbee intelligent wall switch single control circuit.
The utility model discloses do not confine the above-mentioned embodiment to, the ordinary skilled person in the art can adopt other multiple embodiments to implement according to the utility model discloses a, perhaps all adopt the utility model discloses a design structure and thinking do simple change or change, if constitute multichannel single control circuit on this basis, all fall into the protection scope of the utility model.
Claims (10)
1. The utility model provides a bluetooth is direct even day cat or zigbee intelligence wall switch single control circuit, includes main loop and the main switch element, main switch drive circuit, direct current constant voltage power supply circuit and the touch of electric capacity and the bluetooth output circuit of establishing in the main circuit of cluster, the both ends of main loop are the live wire link end of being connected with the live wire and the load link end of being connected with the load respectively, direct current constant voltage power supply circuit provides working power supply for main switch drive circuit and electric capacity touch and bluetooth output circuit, main switch drive circuit control the break-make of main switch element, its characterized in that: direct current regulated power supply circuit includes high direct current supply voltage VCC1 and two sets of constant voltage power supply circuit of low one-high one of low direct current supply voltage VCC3, high direct current supply voltage VCC1 provides the power for DC power supply system, and low direct current supply voltage VCC3 provides the power for control circuit, drive circuit.
2. The bluetooth direct-connected heaven cat or zigbee intelligent wall switch single control circuit as claimed in claim 1, wherein: the direct current stabilized power supply circuit comprises a single-ended flyback switching power supply circuit and two groups of rectification filtering stabilized power supply circuits with one high and one low, the input alternating voltage between the live wire connecting end and the load connecting end is used as the power supply of the single-end flyback switching power supply circuit after being subjected to bridge rectification, the secondary winding of the transformer T1 in the single-ended flyback switching power supply circuit is a center-tapped secondary winding, the output of the secondary coil of the transformer T1 is rectified and filtered by a first rectifying diode VD2 and a filter capacitor C3 to be used as a high dc power supply voltage VCC1 to supply power to a dc power supply system, the center tap output of the secondary coil of the transformer T1 is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal regulator, and then is used as low direct-current power supply voltage VCC3 to provide power for a control circuit and a driving circuit.
3. The bluetooth direct-connected heaven or zigbee intelligent wall switch single control circuit as claimed in claim 2, wherein: the single-ended flyback switching power supply circuit comprises a single-phase rectification circuit DS1, a filter inductor L1, a filter capacitor C2, a positive feedback resistor R6, a positive feedback capacitor C6, a second photoelectric coupler OP2, a second switching MOS transistor V2, a first upper bias resistor R4, a first lower bias resistor R5 and a transformer T1, wherein an input alternating current voltage between a live wire connection end Lin and a load connection end L1 is rectified by a current-limiting resistor R2, a single-phase rectification circuit DS1 and filtered by an LC filter unit consisting of a filter inductor L1 and a filter capacitor C2 to serve as a power supply of the single-ended flyback switching power supply circuit, a primary coil of the transformer T1 is connected between the positive power supply electrode and the ground terminal of the single-ended flyback switching power supply circuit through the drain electrode and the source electrode of the second switching MOS transistor V2, the first upper bias resistor R4 is connected between the positive power supply electrode of the single-ended flyback switching power supply circuit and the grid electrode of the second switching MOS transistor V2, the first lower bias resistor R5 is connected to the gate of the second switching MOS transistor V2 and the power ground of the single-ended flyback switching power supply circuit, and the feedback voltage of the positive feedback coil of the transformer T1 is input to the gate of the second switching MOS transistor V2 through a positive feedback branch composed of the positive feedback resistor R6 and the positive feedback capacitor C6; the center tap output of a secondary coil of a transformer T1 in the single-ended flyback switching power supply circuit is rectified, filtered and stabilized by a second rectifying diode VD3, a filter capacitor and a three-terminal regulator to be used as low direct-current power supply voltage VCC 3; the output of the secondary coil of the transformer T1 is rectified and filtered by a first rectifying diode VD2 and a filter capacitor C3 to be used as a high direct-current power supply voltage VCC 1; the output of a center tap of a secondary coil of the transformer T1 is connected with a power ground end through a diode D4, a current-limiting resistor R16 and the input end of a second photoelectric coupler OP2, and the output end of the second photoelectric coupler OP2 is connected with the grid of the second switch MOS tube V2 and the power ground end of the single-ended flyback switch power circuit to form a voltage-stabilizing control circuit.
4. The Bluetooth direct-connected heaven or zigbee intelligent wall switch single control circuit as claimed in claim 3, wherein: a voltage reduction direct current chopping and chopping drive circuit is arranged between the positive electrode of the high direct current power supply voltage VCC1 and the input end VCC2 of the three-terminal voltage regulator; the voltage-reducing direct-current chopping and chopping drive circuit comprises a voltage-reducing direct-current chopping unit, a chopping pulse generating unit and a pulse blocking circuit unit, wherein the output of the pulse blocking circuit unit controls the chopping pulse output of the chopping pulse generating unit, and the chopping pulse output by the chopping pulse generating unit controls the voltage-reducing direct-current chopping unit; the wall switch single control circuit is further provided with an oscillation blocking circuit, the input end of the oscillation blocking circuit is connected with the output end of the capacitance touch and Bluetooth output circuit, and the input end of the oscillation blocking circuit and the input end of the voltage reduction direct current chopping and chopping drive circuit control the chopping pulse generating circuit.
5. The Bluetooth direct-connected heaven cat or zigbee intelligent wall switch single control circuit as claimed in claim 4, wherein: the step-down direct current chopper unit comprises a first switch tube V3, a second switch tube V4, a second upper bias resistor R6, a second lower bias resistor R7, a differential resistor R8, a differential capacitor C8, a freewheeling diode VD4, a flat wave inductor L2 and a third inverter, wherein the first switch tube V3 is a P-channel MOS tube, the second switch tube V4 is an N-channel MOS tube, the source of the first switch tube V3 is connected with the anode of a high direct current power supply voltage VCC1, the drain of the first switch tube V3 is connected with the input end VCC2 of a three-terminal regulator through the flat wave inductor L2, the gate of the first switch tube V3 is connected with the source of a direct current power supply through the second lower bias resistor R7, the drain of the second switch tube V4 and the drain of the first switch tube V6 in parallel connection with the source and the gate of the first switch tube V3, the differential resistor R8 is connected with the gate of the differential capacitor C8 in series connection with the gate of the first switch tube 3, the other end of the third inverter is connected with the input end of a third inverter, the output end of the third inverter is connected with the grid electrode of a second switching tube V4, and the input end of the third inverter is the chopping pulse input end of the step-down direct current chopping unit.
6. The Bluetooth direct-connected heaven or zigbee intelligent wall switch single control circuit as claimed in claim 5, wherein: the chopping pulse generating unit comprises a first oscillating resistor R9, a second oscillating resistor R10, an oscillating diode VD5, an oscillating capacitor C9, a first inverter and a second inverter, wherein the output end of the first inverter is connected with the input end of the second inverter, the output end of the second inverter is connected with the input end of the third inverter, a series branch of the first oscillating resistor R9, the second oscillating resistor R10 and the oscillating diode VD5 is connected between the input end and the output end of the first inverter in parallel, the oscillating capacitor C9 is connected between the output end of the first inverter and the ground end of a direct-current power supply, and the input end of the first inverter is the control signal input end of the chopping pulse generating unit.
7. The Bluetooth direct-connected heaven cat or zigbee intelligent wall switch single control circuit as claimed in claim 4, wherein: oscillation lockout circuit is including blockading diode VD6, blockading triode V5, blockading resistance R11, and oscillation is opened resistance R12, blockading resistance R11 connects between low DC power supply voltage VCC 3's positive pole and ground end through blockading triode V5 collecting electrode, projecting pole, blockading diode VD6 positive pole is connected on blockading triode V5's the collecting electrode, the negative pole conduct oscillation lockout circuit's control signal output end, it is connected with blockading triode V5's base to open resistance R12 one end, and the other end is connected with electric capacity touch and bluetooth output circuit's output.
8. The bluetooth direct-connected heaven or zigbee intelligent wall switch single control circuit as claimed in claim 2, wherein: and a voltage stabilizing diode VZ2 is arranged between the anode of the high direct-current power supply voltage VCC1 and the input end VCC2 of the three-terminal regulator.
9. The bluetooth direct-connected skyhook or zigbee smart wall switch single control circuit as claimed in any one of claims 1-8, wherein: the main switch element is a bidirectional thyristor VT1, the main switch driving circuit comprises a first current-limiting resistor R2, a second current-limiting resistor R3, a first photoelectric coupler OP1, a first switch MOS transistor V1, a threshold voltage-stabilizing diode VZ1, an anti-interference capacitor C1 and an anti-interference resistor R1, the anti-interference capacitor C1 and the anti-interference resistor R1 are connected between the second anode and the gate of the bidirectional thyristor VT1 in parallel, a series branch of the first current-limiting resistor R2, the output end of the first photoelectric coupler OP1 and the threshold voltage-stabilizing diode VZ1 is connected between the live wire connecting end and the gate of the bidirectional thyristor VT1 in parallel, and a charging diode VD1 is further connected between the cathode of the threshold voltage-stabilizing diode VZ1 and the high direct-current power supply voltage VCC 1; the second current-limiting resistor R3 is connected with the input end of a first photoelectric coupler OP1 and the input end of a first switch MOS tube V1 in series at the two ends of the low direct-current power supply voltage VCC3, and the output end of the capacitance touch and Bluetooth output circuit is connected with the grid electrode of the first switch MOS tube V1 to form the main switch driving circuit.
10. The bluetooth direct-connected skyhook or zigbee smart wall switch single control circuit as claimed in any one of claims 1-8, wherein: the main switching elements are a relay K1, a third switching tube V7 and a fourth switching tube V8, the sources of the third switching tube V7 and the fourth switching tube V8 are connected and then connected with the ground end of the DC stabilized power supply circuit, a normally open contact K1-1 of the relay K1 is connected between the live wire connecting end and the load connecting end through a series branch formed after the drains of the third switching tube V7 and the fourth switching tube V8 are connected to form the main loop, and the voltage between the drains of the third switching tube V7 and the fourth switching tube V8 is used for providing input power for the step-down DC chopping and chopping driving circuit through a single-phase rectification circuit DS 2;
the main switch driving circuit comprises a fifth switching tube V9, a sixth switching tube V10, a seventh switching tube V11 and a discharge resistor R16, wherein the source electrode of the fifth switching tube V9 is connected with the positive electrode output end VCC4 of the step-down direct-current chopper unit, the source electrode is connected with the input end VCC2 of the three-terminal voltage regulator through a current-limiting resistor R18, the discharge resistor R16 is connected between the source electrode and the grid electrode of the fifth switching tube V9 in parallel, and the grid electrode of the fifth switching tube V9 is connected with the ground end of the direct-current stabilized power supply circuit through the drain electrode and the source electrode of the sixth switching tube V10; a coil of the relay K1 is connected between the positive output end VCC4 and the ground end of the buck direct-current chopper unit through the drain and the source of a seventh switching tube V11; a static power supply resistor R15 is bridged between the positive electrode of the high direct-current power supply voltage VCC1 and the positive electrode output end VCC4 of the step-down direct-current chopper unit;
a conducting state DC voltage stabilizing circuit is also arranged, the conducting state DC voltage stabilizing circuit comprises a voltage sampling voltage-regulator tube DZ1, a current-limiting resistor R13, a voltage-stabilizing control triode V6, a time-delay resistor R14, a time-delay capacitor C10 and a fourth inverter, the negative electrode of the voltage sampling voltage-stabilizing tube DZ1 is connected with the positive electrode of a high DC power supply voltage VCC1, the positive electrode is connected with the base electrode of the voltage-stabilizing control triode V6 through a current-limiting resistor R13, the delay capacitor C10 is connected in parallel with the collector and the emitter of the voltage-stabilizing control triode V6, the input end of the fourth inverter is connected with the collector of a voltage-stabilizing control triode V6, the grid electrodes of the third switching tube V7 and the fourth switching tube V8 are connected and then connected with the output end of the fourth inverter, one end of the delay resistor R14 is connected with the collector of the voltage-stabilizing control triode V6, and the other end is connected with the anode of the low direct-current power supply voltage VCC 3.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020538476.1U CN212034395U (en) | 2020-04-13 | 2020-04-13 | Bluetooth directly links sky cat or zigbee intelligence wall switch single control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020538476.1U CN212034395U (en) | 2020-04-13 | 2020-04-13 | Bluetooth directly links sky cat or zigbee intelligence wall switch single control circuit |
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| CN212034395U true CN212034395U (en) | 2020-11-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111343755A (en) * | 2020-04-13 | 2020-06-26 | 刘冰冰 | Bluetooth directly links sky cat or zigbee intelligence wall switch single control circuit |
| CN112596426A (en) * | 2020-11-30 | 2021-04-02 | 深圳市欧瑞博科技股份有限公司 | Control and networking method and device of single-live-wire Bluetooth intelligent switch and electronic equipment |
| CN112867195A (en) * | 2021-01-25 | 2021-05-28 | 刘冰冰 | KA type single live wire wall intelligent switch |
-
2020
- 2020-04-13 CN CN202020538476.1U patent/CN212034395U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111343755A (en) * | 2020-04-13 | 2020-06-26 | 刘冰冰 | Bluetooth directly links sky cat or zigbee intelligence wall switch single control circuit |
| CN112596426A (en) * | 2020-11-30 | 2021-04-02 | 深圳市欧瑞博科技股份有限公司 | Control and networking method and device of single-live-wire Bluetooth intelligent switch and electronic equipment |
| CN112867195A (en) * | 2021-01-25 | 2021-05-28 | 刘冰冰 | KA type single live wire wall intelligent switch |
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