CN1449113A - Microprocessor controlled AC switch circuit - Google Patents
Microprocessor controlled AC switch circuit Download PDFInfo
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- CN1449113A CN1449113A CN 03112371 CN03112371A CN1449113A CN 1449113 A CN1449113 A CN 1449113A CN 03112371 CN03112371 CN 03112371 CN 03112371 A CN03112371 A CN 03112371A CN 1449113 A CN1449113 A CN 1449113A
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- 229910052710 silicon Inorganic materials 0.000 claims description 12
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Abstract
The microprocessor controlled AC switch circuit includes DC power source circuit and AC relay-operating DC control circuit. Both the DC power source circuit and the AC relay-operating DC control circuit have impedance comprising parallelly connected resistor and capacitor in their input; and the AC relay-operating DC control circuit has also relay circuit. The present invention is simple and reasonable in structure, has no transformer and may be produced into small circuit module for easy installation on household electric equipment. The AC switch circuit can turn off AC power radically and has mW level power consumption after the electric equipment is turned off. The AC switch circuit may be used in color TV set for true remote AC off.
Description
Technical field
The present invention relates to a kind of circuit structure, be specially a kind of alternating current switching circuit of microprocessor control.
Background technology
On various power consumption equipments, (as colour TV, refrigerator, air conditioner etc.) exist the alternating current switching circuit of various structures in a large number on the particularly various household electrical appliance, realization to the break-make of various power devices and conversion and control (as the Auto Power On and the shutdown of remote control colour TV set, the commentaries on classics of freezer compressor, stop control, the control of the switch of electromagnetically operated valve, the control of just the changeing of air-conditioner fan, counter-rotating and stall).These alternating current switching circuits mostly adopt direct current relay as the electric switch parts, the solenoid that is relay adopts dc powered, and be subjected to electronic circuit control, and the contact of relay links with ac power circuit, is used to control the break-make and the conversion of AC electric appliance.Therefore, be referred to as the dc operation AC relay on this relay stricti jurise.Now alternating current switching circuit comprises DC power supply circuit and relay drive circuit, control circuit usually, and control circuit is the electronic circuit of core often with the microprocessor, microprocessor is as the center of information gathering, information processing, by handling to gathering the signal that comes, and according to the program that designs in advance, corresponding output at microprocessor sends corresponding instruction, as status signal, the directly or indirectly adhesive or the release of control relay is controlled the break-make of alternating current thereby finish.
Relay drive circuit and the shared DC power supply circuit of control circuit in the existing alternating current switching circuit, this DC power supply circuit mostly adopts transformer commutation supply voltage or Switching Power Supply supply power mode.They have the shortcoming that volume is big, circuit is complicated, and along with the relay quantity of control increases, the power consumption of transformer and volume are also along with increase.More crucially be, if power circuit is as the general supply of power consumption equipment, particularly when power consumption is big, adopt the dc operation AC relay control circuit of above-mentioned supply power mode, under the power consumption equipment off-position, can not the cut off the electricity supply power supply of circuit, therefore, there is potential safety hazard, and still consumes bigger power.For example remote control colour TV set is under holding state, and Switching Power Supply continue to give microprocessor and remote-control receiving circuit power supply in the colour TV, otherwise remote-controlled start-up just can't be realized still in work.During the compressor stall of refrigerator, air-conditioning, the transformer rectification circuit can not cut off the power supply, otherwise relay is because of no driving DC voltage adhesive again, and control circuit does not quit work because of there being direct current supply.Obviously, existing alternating current switching circuit adopts above-mentioned method of supplying power to have defective, because volume more also is unfavorable for realizing circuit modular.
In addition, also have some AC electric equipment,, on power consumption equipment, be provided with work/energy-saving control circuit for convenience on using and energy-saving and cost-reducing or prolongation service life of equipment.As microcomputer monitor, when keyboard with mouse is not worked for a long time or when shutting down with program, the microprocessor in the display will detect the change information of the synchronizing signal that is provided with under VESA DPMS (display power management sig-maling) pattern.The status signal of the corresponding output end of microprocessor is changed, and auxiliary power and the load circuit thereof of controlling display by the control circuit in the complete machine quit work, thereby display is in stopped status.But at this moment still have main power source and microprocessor and synchronizing signal receiving circuit in running order, complete machine still has the power consumption about 8 watts, and complete machine also not and alternating current isolate, otherwise display recovers operate as normal automatically in the time of can not or reopening main frame at operation keyboard and mouse again.In fact this stopped status is a kind of mode that main power circuit is in holding state, obviously has aforesaid shortcoming.
At present, the start of microcomputer (computer) all adopts the manual operation mains switch to realize the cold start-up of microcomputer.When using microcomputer, at first use manual method and open the display power supply switch, then, open host power switch again.Obviously operating process is cumbersome.If can change the mains switch of display into be subjected to the control of main frame DPMS function dc operation AC relay switch circuit, wouldn't energy-conservationly save trouble again.
Summary of the invention
The present invention solves the existing power consumption equipment problem that particularly used alternating current switching circuit adopts transformer commutation supply voltage or Switching Power Supply supply power mode to be brought on the household electrical appliance, and a kind of alternating current switching circuit that can really accomplish power consumption equipment and microprocessor control that volume little that isolate with alternating current under holding state is provided.
The present invention adopts following technical scheme to realize: the alternating current switching circuit of microprocessor control, comprise and contain rectification circuit, the control circuit of the DC power supply circuit of voltage stabilizing circuit and dc operation AC relay, the ac input end of the rectification circuit of DC power supply circuit is serially connected with by resistance, the reactance that electric capacity is formed in parallel, the control circuit of dc operation AC relay comprises rectification circuit, the ac input end of this rectification circuit also is serially connected with by resistance, the reactance that electric capacity is formed in parallel, the control circuit of dc operation AC relay also comprises by the DC power supply circuit power supply and by photoelectrical coupler G2, light-emitting diode among the photoelectricity coupling controllable silicon G1, the collector electrode of triode BG4, the controlled loop that the emitter serial connection forms, the base stage of triode BG4 links to each other with the output of an operational amplifier 3 in the controlled loop, and the inverting input of operational amplifier 3 be connected in the DC power supply circuit output by resistance R 9, the bleeder circuit that R10 constitutes links to each other, its in-phase input end is subjected to corresponding output control terminal (or other the external source control signal) control of microprocessor, between two inputs of the AC power of dc operation AC relay control circuit, be connected with by the diode D3 in its rectification circuit, the coil of relay J 1, bidirectional triode thyristor S1, thermistor RT1, diode D10, the pull-in relay circuit that the normally-closed contact J1-1 serial connection of relay J 1 forms, wherein the control utmost point g of bidirectional triode thyristor S1 is through resistance R 7, photoelectricity coupling controllable silicon G1 links to each other with the first anode T1 of bidirectional triode thyristor S1, direct current output two ends at the rectification circuit of dc operation AC relay control circuit are connected with by triode BG2, the coil of the relay J 1 of triode BG2 collector electrode, the relay holding circuit that the diode D9 of triode BG2 emitter constitutes, wherein the base loop of triode BG2 is by resistance R 6, the optocoupler triode of photoelectrical coupler G2 is formed by connecting, and the normally opened contact J1-2 of relay J 1 is serially connected with the interchange input side of the rectification circuit in the dc operation AC relay control circuit and the ac power supply circuit of power consumption equipment.
The reactance of the rectification circuit ac input end serial connection of DC power supply circuit and dc operation AC relay control circuit plays current limliting, hypotensive effect, thereby can avoid using transformer.DC power supply circuit provides required DC power supply to microprocessor, when microprocessor when the normal phase input end of operational amplifier 3 provides switch state signal, the output of operational amplifier 3 provides high or low current potential, triode BG4 conducting or end, thereby make the controlled loop conducting in the dc operation AC relay control circuit or end, during this controlled loop conducting, at first make the pull-in relay circuit conducting, make the coil of relay J 1 charged with bigger attract current, the normally-closed contact J1-1 of relay J 1 disconnects, normally opened contact J2-2 closure, power consumption equipment begins Alternating Current Power Supply, the relay holding circuit of dc operation AC relay control circuit makes relay J 1 be in little electric current and keeps electriferous state with the lower current lead-through of keeping simultaneously; During this not conducting of controlled loop, relay J 1 dead electricity, its normally-closed contact J1-1 closure, normally opened contact J2-2 disconnect, and stop to the power consumption equipment Alternating Current Power Supply.
The operational amplifier of containing 1 is arranged in DC power supply circuit; 2 overvoltage crowbar; the inverting input of the normal phase input end of operational amplifier 1 and operational amplifier 2 be connected in the DC power supply circuit output by resistance R 9; the bleeder circuit that R10 constitutes links to each other; the normal phase input end of operational amplifier 2 be connected in DC power supply circuit rectification circuit dc output end by resistance R W1; R8; the bleeder circuit that R11 constitutes links to each other; the output of operational amplifier 2 is connected with the inverting input of operational amplifier 1 through diode D11; and being parallel with capacitor C 7 and resistance R 12 at the reverse input end of operational amplifier 1, DC power supply circuit is through the controlled loop power supply of overvoltage crowbar in the control circuit of dc operation AC relay (be controlled loop change DC power supply circuit into by former DC power supply circuit power supply power through overvoltage crowbar).Like this, the controlled loop in the dc operation AC relay control circuit is subjected to the dual control of the corresponding output control terminal and the overvoltage crowbar (output of operational amplifier 1) of microprocessor.Voltage just often, the output of operational amplifier 1 output high potential, above-mentioned controlled circuit and whole dc operation AC relay control circuit operate as normal; During overvoltage, the output of operational amplifier 1 is an electronegative potential, and no matter microprocessor provides opens or closes control signal, above-mentioned not conductings of controlled circuit, thus realize overvoltage protection.
Two ac input end sides of the rectification circuit in the DC power supply circuit all are serially connected with the reactance that is formed in parallel by resistance, electric capacity, help being connected of this alternating current switching circuit and other circuit, when an end of AC power when low-resistance in other circuit is communicated with, the arbitrary distolateral reactance of two ac input end sides can both be played buffer action, avoids because of only distolaterally being serially connected with other circuit that reactance is burnt the regulator rectifier circuit in this alternating current switching circuit and is connected with this alternating current switching circuit at one that exchanges input.Simultaneously, two of the rectification circuit in the DC power supply circuit ac input end sides all are serially connected with the consideration that the personal safety aspect is also come from the reactance that is formed in parallel by resistance, electric capacity.
The alternating current switching circuit of microprocessor control of the present invention; it can comprise the identical dc operation AC relay control circuit of a plurality of structures; each dc operation AC relay control circuit finally all is subjected to the control of corresponding output control terminal of microprocessor and overvoltage crowbar, and each dc operation AC relay control circuit is controlled the power supply open and close of different power consumption equipments or consuming parts.Because the power supply Push And Release of different power consumption equipments or consuming parts is also asynchronous in practice, the control signal of the normal phase input end that is controlled by the corresponding control output end of microprocessor of the operational amplifier 3 in the dc operation AC relay control circuit corresponding with each power consumption equipment or consuming parts can be carried out modification on the basis of signals of the corresponding control output end of microprocessor, to satisfy the nonsynchronous demand of different power consumption equipments or consuming parts power supply Push And Release.
The alternating current switching circuit of microprocessor control of the present invention is simple and reasonable for structure, realizes current limliting, hypotensive effect with reactance, need not transformer.Particularly on the household electrical appliance, functional circuit moduleization has become the trend of development to power consumption equipment, and this alternating current switching circuit is made circuit module, and its volume is little, is convenient to installing and fixing on power consumption equipment or household electrical appliance.This alternating current switching circuit can be realized interchange shutoff truly substantially, after closing the Alternating Current Power Supply of power consumption equipment, the power hungry of this alternating current switching circuit is only in the milliwatt level, and this alternating current switching circuit is used for colour TV, colour TV can be realized real remote control ac dump, and it is especially obvious that effect embodies.This alternating current switching circuit is applied to microcomputer monitor, can realize the control of main frame to display Auto Power On and shutdown, and has simplified the circuit of display complete machine greatly.This alternating current switching circuit has the advantages that the big electric current adhesive of relay, little electric current are kept, and power consumption is few down in normal operating conditions (keeping operating state).This alternating current switching circuit can comprise on the household electrical appliance at the multiple power consumption equipment that microprocessor control opens and closes and uses.
Description of drawings
Fig. 1 is the circuit structure schematic diagram of circuit of the present invention;
Fig. 2 is DC power supply circuit of the present invention and the circuit structure schematic diagram that connects two dc operation AC relay control circuits;
Embodiment
Present embodiment is used for color television set with the alternating current switching circuit of microprocessor control of the present invention.
The alternating current switching circuit of microprocessor control, comprise and contain rectification circuit, the control circuit of the DC power supply circuit of voltage stabilizing circuit and dc operation AC relay, rectification circuit adopts the diode bridge rectification, voltage stabilizing circuit adopts 78L05 voltage stabilizing chip, the ac input end of the rectification circuit of DC power supply circuit is serially connected with by resistance, the reactance that electric capacity is formed in parallel, and two ac input end sides of rectification circuit all are serially connected with respectively by resistance R 2, capacitor C 2 and resistance R 3, the reactance that capacitor C 3 is formed in parallel (like this, help rectification, other circuit in voltage stabilizing circuit and the colour TV is connected, when an end of AC power when circuit low-resistance in the colour TV complete machine is communicated with, buffer action is all played in the reactance of two ac input end sides, avoid because of only burning other circuit in regulator rectifier circuit and the connected colour TV complete machine exchanging input one distolateral serial connection reactance), the control circuit of dc operation AC relay comprises rectification circuit, the ac input end of this rectification circuit is serially connected with by resistance R 1, the reactance that capacitor C 1 is formed in parallel, the control circuit of dc operation AC relay also comprises by the DC power supply circuit power supply and by photoelectrical coupler G2, light-emitting diode among the photoelectricity coupling controllable silicon G1, the collector electrode of triode BG4, the controlled loop that the emitter serial connection forms, the base stage of triode BG4 links to each other with the output of an operational amplifier 3 in the controlled loop, and the inverting input of operational amplifier 3 be connected in the DC power supply circuit output by resistance R 9, the bleeder circuit that R10 constitutes links to each other, its in-phase input end is subjected to corresponding output control terminal (POWER) control of microprocessor, between two inputs of the AC power of dc operation AC relay control circuit, be connected with by the diode D3 in its rectification circuit, the coil of relay J 1, bidirectional triode thyristor S1, thermistor RT1, diode D10, the pull-in relay circuit that the normally-closed contact J1-1 serial connection of relay J 1 forms, wherein the control utmost point g of bidirectional triode thyristor S1 is through resistance R 7, photoelectricity coupling controllable silicon G1 links to each other with the first anode T1 of bidirectional triode thyristor S1, direct current output two ends at the rectification circuit of dc operation AC relay control circuit are connected with by triode BG2, the coil of the relay J 1 of triode BG2 collector electrode, the relay holding circuit that the diode D9 of triode BG2 emitter constitutes, wherein the base loop of triode BG2 is by resistance R 6, the optocoupler triode of photoelectrical coupler G2 is formed by connecting, and the normally opened contact J1-2 of relay J 1 is serially connected with the interchange input side of the rectification circuit in the dc operation AC relay control circuit and the ac power supply circuit of power consumption equipment.
Coil two ends in relay J 1 are parallel with capacitor C 6, guarantee that the coil of relay J 1 is steadily charged, the reliable adhesive in its contact.
For the alternating current switching circuit that makes this microprocessor control has over-voltage protecting function; the operational amplifier of containing 1 is arranged in DC power supply circuit; 2 overvoltage crowbar; the inverting input of the normal phase input end of operational amplifier 1 and operational amplifier 2 be connected in the DC power supply circuit output by resistance R 9; the bleeder circuit that R10 constitutes links to each other; the normal phase input end of operational amplifier 2 be connected in DC power supply circuit rectification circuit dc output end by resistance R W1; R8; the bleeder circuit that R11 constitutes links to each other; the output of operational amplifier 2 is connected with the inverting input of operational amplifier 1 through diode D11; and being parallel with capacitor C 7 and resistance R 12 at the inverting input of operational amplifier 1, DC power supply circuit is through the controlled loop power supply of overvoltage crowbar in the control circuit of dc operation AC relay.
The dc output end of the rectification circuit of the rectification circuit dc output end of DC power supply circuit and dc operation AC relay control circuit also is connected with the direct-current voltage reducing circuit that is made of triode BG3, the resistance R 5 that is connected in triode BG3 base stage, voltage stabilizing didoe DW2 and triode BG1, the resistance R 4 that is connected in triode BG1 base stage, voltage stabilizing didoe DW1 respectively.Unnecessary energy when direct-current voltage reducing circuit is used to protect this alternating current switching circuit to avoid impacting with high pressure and absorbs the AC power overvoltage.
The alternating current switching circuit of this microprocessor control is made circuit module, this module will have 8 external end lines, 1,8 is ac input end, 3,8 is the ac output end line, be used for rectification circuit power supply, connect start, the shut down switch K1 of colour TV between the line end 1,2 to the Switching Power Supply of colour TV, line end 5,6,7 respectively with the colour TV complete machine in the V of microprocessor (CPU)
DD, POWER, V
SSPin links to each other.
With the DC power supply circuit in the alternating current switching circuit of the present invention is that microprocessor (CPU) and remote-control receiving circuit in the colour TV complete machine provides required operating voltage, replaces Switching Power Supply power supply in the former cause colour TV machine.Under holding state, because the Switching Power Supply in the complete machine is no longer worked, power consumption is by original more than 7 watts, become present milliwatt level, and overcome colour TV complete machine indirect current still when standby, exist safety to fall into the drawback of suffering from, the complete machine mains switch of colour TV is also used miniature touch-switch instead or is realized the non source switch operation simultaneously.
Console switch K1 closure during start, the DC power supply circuit input ac voltage of forming for bridge rectifier, filtering, DC decompression, the voltage stabilizing circuit of two-way capacitance-resistance isolated buck, DC power supply circuit will export+and 5V direct voltage stably, satisfy the condition of work that circuit is accepted in microprocessor and remote control.Microprocessor just enters normal operating conditions after getting electric resetting, if the signal of the former storage memory of microprocessor is an open state, at this moment will export a kind of status signal (establishing open state is that high level, holding state are low level) at the corresponding output port of microprocessor (POWER), the input interface that this high level signal is added in modular circuit is normal phase input end the 10th pin of transport and placing device 3, make transport and placing device 3 also export high level, thereby make triode BG
4Conducting, optical coupling controllable silicon G
1With optical coupler G
2Light-emitting diode have electric current to flow through, so optocoupler controllable silicon G1 conducting.At this moment AC power will be from second end of power supply (external terminal 8 of N end or module) through rectifier diode D
3, relay coil J1 and storage capacitor C
6Parallel branch, bidirectional triode thyristor S
1Second plate T
2, bidirectional triode thyristor control utmost point g, current-limiting resistance R
7, optocoupler controllable silicon G
1Two silicon, current limliting PTC element RT
1, diode D
10, relay J
1Normally-closed contact J
1-1, power supply first end (L end or module external terminal 1) forms the loop.Because bidirectional triode thyristor S
1Control utmost point loop have electric current to pass through, so bidirectional triode thyristor S
1Conducting, at this moment big starting current will pass through along pull-in relay circuit, and storage capacitor C6 charges rapidly, and charging voltage rises to and satisfies relay J
1During the adhesive condition, so relay J
1Finish the adhesive action, relay J
1Normally-closed contact J
1-1Disconnect, starting process finishes, relay J
1Normally opened contact J
1-2Closure is connected on the one hand the alternating voltage (if adopt double-contact change type relay, can control the break-make of first end and second end of power supply simultaneously) of supplying with the colour TV complete machine, has also connected the holding circuit for the relay power supply on the other hand, because optical coupler G at this moment
2The conducting of optocoupler triode, so triode BG of control relay holding circuit break-make
2Also conducting, relay J
1Owing to also have the less electric current of keeping to pass through, therefore be in the maintenance attracting state.If microprocessor get electric reset enter normal operating conditions after, the signal of storage memory is a holding state, at this moment the output end of microprocessor mouth is a low level, this low level signal does not produce effect to module, therefore colour TV still is in holding state, also need to give starting-up signal of colour TV with remote controller, after remote control is accepted circuit and is received starting-up signal in the colour TV, after microprocessor identification is handled, corresponding output end (POWER) becomes high level, so module under the effect of this high voltage signal, will repeat the foregoing circuit course of work, make relay J
1Adhesive, thereby the purpose of realization remote-controlled start-up.
When the needs remote-control closedown, only need to accept circuit with remote controller to remote control in the machine and send out an off signal, remote control is accepted circuit and is received this off signal, after microprocessor is discerned processing, will provide a status signal at corresponding output end (POWER), this circuit is made as low level.This low level signal is not had an effect to module, so the electronic component in the module all locates cut-off state, is cut off so keep electric current, and relay J 1 discharges, and disconnects the alternating current of supplying with colour TV, thereby has realized the purpose of remote control ac dump.Manually also can realize the purpose of ac dump in addition: turn off K switch 1,, do not have high potential module is had an effect, so relay J 1 is in the release operating state, thereby make complete machine be in off-mode because little processing dead electricity is not worked.
The over-voltage protecting function of this circuit (or this module) is achieved in that the height of AC supply voltage; the output that directly is reflected at rectification circuit is the positive voltage input of three terminal regulator; the overvoltage signal is taken from by adjustable resistance RW1 and resistance R 8; on the resistance R 8 of the overvoltage sampling branch circuit that resistance R 11 is formed and the connected node of resistance R 11; normal phase input end the 5th pin of input transport and placing device 2; ripple voltage through transport and placing device 2 amplifications; through diode D11 rectification and capacitor C 7 filtering, the reverse input end of input transport and placing device 1.In the normal voltage scope, the voltage signal of transport and placing device 2 normal phase input ends is lower than the reference voltage that is added in inverting input, so transport and placing device 2 output electronegative potentials, and transport and placing device 1 output high potential is as the supply power voltage of optocoupler controllable silicon G1 and optical coupler G2 light-emitting diode.When supply voltage raises, when the overvoltage signal surpasses set point, through the ripple voltage of transport and placing device 2 amplifications, through the filtering of diode D11 rectification and capacitor C 7, the voltage of the reverse input end of input transport and placing device 1 just is higher than the reference voltage of transport and placing device 1 normal phase input end, thereby makes transport and placing device 1 output electronegative potential.So the light-emitting diode of optical coupler G2 and optocoupler controllable silicon G1 passes through because of losing the power supply no current, therefore the circuit of module all is in by operating state, relay J 1 is in release condition, have only after supply voltage recovers normally, transport and placing device 1 output could recover high potential, for the optical coupler light-emitting diode provides operating voltage, thereby make modular circuit be subjected to the control of the corresponding output end current potential of microprocessor.
Embodiment 2
Present embodiment is used for refrigerator with the alternating current switching circuit of microprocessor control of the present invention.Because the compressor of refrigerator has actuating coil and operating coils, therefore, this alternating current switching circuit has two dc operation AC relay control circuits that structure is identical, is connected to the two ends of AC power, is used to control the open and close of the Alternating Current Power Supply of actuating coil and the public input of two coils.
Because the actuating coil of compressor is only switched in starting process, after finishing, starting process only needs the operating coils energising, therefore, the dc operation AC relay control circuit of control actuating coil and the public input of two coils can not close synchronously, after finishing the compressor start process, the dc operation AC relay control circuit of control actuating coil must cut out, power to actuating coil stopping, thereby, the control signal of the normal phase input end of the operational amplifier 4 in the controlled loop of dc operation AC relay control circuit of control actuating coil, modification to some extent on the basis of the corresponding output end of microprocessor.The output of the operational amplifier 3 in the delay circuit that the normal phase input end of the operational amplifier 3 (physical circuit in Fig. 2 is labeled as operational amplifier 4) in (actuating coil) dc operation AC relay control circuit is formed by capacitor C 8 and resistance R 16 and another (compressor operation coil and the public input of actuating coil) dc operation AC relay control circuit links to each other.
When the output of operational amplifier 3 is high level, the normal phase input end of operational amplifier 4 also is a high level, the all normal adhesive of the relay of two dc operation AC relay control circuits, respectively to actuating coil and the public input Alternating Current Power Supply of two coils, after the delay circuit of operational amplifier 4 normal phase input ends passes through the 5-10 time-delay of second, the normal phase input end that makes operational amplifier 4 is an electronegative potential, thereby the relay of control actuating coil is resetted, actuating coil is stopped power supply, and operating coils normal power supply still, freezer compressor is finished starting, runs well.
Claims (4)
1, the alternating current switching circuit of a kind of microprocessor control comprises the DC power supply circuit that contains rectification circuit, voltage stabilizing circuit and the control circuit of dc operation AC relay, it is characterized by:
The ac input end of the rectification circuit of DC power supply circuit is serially connected with the reactance that is formed in parallel by resistance, electric capacity,
The control circuit of dc operation AC relay comprises rectification circuit, the ac input end of this rectification circuit is serially connected with by resistance R 1, the reactance that capacitor C 1 is formed in parallel, the control circuit of dc operation AC relay also comprises by the DC power supply circuit power supply and by photoelectrical coupler G2, light-emitting diode among the photoelectricity coupling controllable silicon G1, the collector electrode of triode BG4, the controlled loop that the emitter serial connection forms, the base stage of triode BG4 links to each other with the output of an operational amplifier (3) in the controlled loop, and the inverting input of operational amplifier (3) be connected in the DC power supply circuit output by resistance R 9, the bleeder circuit that R10 constitutes links to each other, its in-phase input end is subjected to corresponding output control terminal (or other the external source control signal) control of microprocessor, between two inputs of the AC power of dc operation AC relay control circuit, be connected with by the diode D3 in its rectification circuit, the coil of relay J 1, bidirectional triode thyristor S1, thermistor RT1, diode D10, the pull-in relay circuit that the normally-closed contact J1-1 serial connection of relay J 1 forms, wherein the control utmost point g of bidirectional triode thyristor S1 is through resistance R 7, photoelectricity coupling controllable silicon G1 links to each other with the first anode T1 of bidirectional triode thyristor S1, direct current output two ends at the rectification circuit of dc operation AC relay control circuit are connected with by triode BG2, the coil of the relay J 1 of triode BG2 collector electrode, the relay holding circuit that the diode D9 of triode BG2 emitter constitutes, wherein the base loop of triode BG2 is by resistance R 6, the optocoupler triode of photoelectrical coupler G2 is formed by connecting, and the normally opened contact J1-2 of relay J 1 is serially connected with the interchange input side of the rectification circuit in the dc operation AC relay control circuit and the ac power supply circuit of power consumption equipment.
2; the alternating current switching circuit of microprocessor control as claimed in claim 1; it is characterized by: the operational amplifier of containing (1) is arranged in DC power supply circuit; (2) overvoltage crowbar; the inverting input of the normal phase input end of operational amplifier (1) and operational amplifier (2) be connected in the DC power supply circuit output by resistance R 9; the bleeder circuit that R10 constitutes links to each other; the normal phase input end of operational amplifier (2) be connected in DC power supply circuit rectification circuit dc output end by resistance R W1; R8; the bleeder circuit that R11 constitutes links to each other; the output of operational amplifier (2) is connected with the inverting input of operational amplifier (1) through diode D11; and being parallel with capacitor C 7 and resistance R 12 at the reverse input end of operational amplifier (2), DC power supply circuit is through the controlled loop power supply of overvoltage crowbar in the control circuit of dc operation AC relay.
3, the alternating current switching circuit of microprocessor control as claimed in claim 1 or 2, it is characterized by: the dc output end of the rectification circuit of the rectification circuit dc output end of DC power supply circuit and dc operation AC relay control circuit also is connected with the direct-current voltage reducing circuit that is made of triode BG3, the resistance R 5 that is connected in triode BG3 base stage, voltage stabilizing didoe DW2 and triode BG1, the resistance R 4 that is connected in triode BG1 base stage, voltage stabilizing didoe DW1 respectively.
4, the alternating current switching circuit of microprocessor control as claimed in claim 1 or 2, it is characterized by: this alternating current switching circuit has two dc operation AC relay control circuits that structure is identical, be connected to the two ends of AC power, the output of the operational amplifier (3) in the delay circuit that the normal phase input end of the operational amplifier (4) in the dc operation AC relay control circuit is formed by capacitor C 8 and resistance R 16 and another dc operation AC relay control circuit links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112371 CN1246874C (en) | 2003-04-30 | 2003-04-30 | Microprocessor controlled AC switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112371 CN1246874C (en) | 2003-04-30 | 2003-04-30 | Microprocessor controlled AC switch circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1449113A true CN1449113A (en) | 2003-10-15 |
| CN1246874C CN1246874C (en) | 2006-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03112371 Expired - Fee Related CN1246874C (en) | 2003-04-30 | 2003-04-30 | Microprocessor controlled AC switch circuit |
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| Country | Link |
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| CN (1) | CN1246874C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576626A (en) * | 2009-12-21 | 2012-07-11 | 矢崎总业株式会社 | Heat-generation inhibiting circuit for exciting coil in relay |
| CN102109867B (en) * | 2009-12-25 | 2013-05-08 | 中国长城计算机深圳股份有限公司 | Household appliance energy-saving circuit, control method and display device |
| CN104035343A (en) * | 2013-03-08 | 2014-09-10 | 深圳市海洋王照明工程有限公司 | High-voltage electrical equipment and switch circuit thereof |
| WO2015000235A1 (en) * | 2013-07-04 | 2015-01-08 | 京东方科技集团股份有限公司 | Driving circuit and light-emitting device |
| CN106130012A (en) * | 2016-06-29 | 2016-11-16 | 温州宝翔科技有限公司 | Smart electronics transducer and control method thereof |
| TWI632580B (en) * | 2017-04-18 | 2018-08-11 | 徐政村 | Power switch module |
| CN109067386A (en) * | 2018-11-02 | 2018-12-21 | 南京工程学院 | Capacitor type touch switch circuit and its switch state judgment method |
| CN113589915A (en) * | 2021-07-30 | 2021-11-02 | 深圳市世纪创新显示电子有限公司 | Shutdown energy-saving display circuit and display |
-
2003
- 2003-04-30 CN CN 03112371 patent/CN1246874C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102576626A (en) * | 2009-12-21 | 2012-07-11 | 矢崎总业株式会社 | Heat-generation inhibiting circuit for exciting coil in relay |
| CN102576626B (en) * | 2009-12-21 | 2014-11-05 | 矢崎总业株式会社 | Heat-generation inhibiting circuit for exciting coil in relay |
| CN102109867B (en) * | 2009-12-25 | 2013-05-08 | 中国长城计算机深圳股份有限公司 | Household appliance energy-saving circuit, control method and display device |
| CN104035343A (en) * | 2013-03-08 | 2014-09-10 | 深圳市海洋王照明工程有限公司 | High-voltage electrical equipment and switch circuit thereof |
| US9516715B2 (en) | 2013-07-04 | 2016-12-06 | Boe Technology Group Co., Ltd. | Driving circuit and light emitting device |
| WO2015000235A1 (en) * | 2013-07-04 | 2015-01-08 | 京东方科技集团股份有限公司 | Driving circuit and light-emitting device |
| CN106130012A (en) * | 2016-06-29 | 2016-11-16 | 温州宝翔科技有限公司 | Smart electronics transducer and control method thereof |
| CN106130012B (en) * | 2016-06-29 | 2018-06-26 | 温州宝翔科技有限公司 | Smart electronics converter and its control method |
| TWI632580B (en) * | 2017-04-18 | 2018-08-11 | 徐政村 | Power switch module |
| CN109067386A (en) * | 2018-11-02 | 2018-12-21 | 南京工程学院 | Capacitor type touch switch circuit and its switch state judgment method |
| CN109067386B (en) * | 2018-11-02 | 2023-08-04 | 南京工程学院 | Capacitive touch switch circuit and its switch state judging method |
| CN113589915A (en) * | 2021-07-30 | 2021-11-02 | 深圳市世纪创新显示电子有限公司 | Shutdown energy-saving display circuit and display |
| CN113589915B (en) * | 2021-07-30 | 2024-11-22 | 深圳市世纪创新显示电子有限公司 | A shutdown energy-saving display circuit and display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1246874C (en) | 2006-03-22 |
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