CN204231011U - A kind of civil power input and inversion output switching circuit of power converter - Google Patents
A kind of civil power input and inversion output switching circuit of power converter Download PDFInfo
- Publication number
- CN204231011U CN204231011U CN201420533159.5U CN201420533159U CN204231011U CN 204231011 U CN204231011 U CN 204231011U CN 201420533159 U CN201420533159 U CN 201420533159U CN 204231011 U CN204231011 U CN 204231011U
- Authority
- CN
- China
- Prior art keywords
- connects
- output
- civil power
- relay
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of civil power input and inversion output switching circuit of power converter, comprise main commutation circuit, civil power input detecting circuit, inverter signal testing circuit and single-chip microcomputer, the signal output part of civil power input detecting circuit and inverter signal testing circuit connects signal input part corresponding to single-chip microcomputer respectively; Main commutation circuit comprises output relay and two transfer relays, the normally-closed contact of the first transfer relay connects inversion and exports live wire, normally opened contact connects civil power input live wire, and common connects the first contact of output relay, and the second contact of output relay connects to exchange and exports live wire; The normally-closed contact of the second transfer relay connects inversion and exports zero line, and normally opened contact connects civil power input zero line, and common connects to exchange and exports zero line; The signal input part of output relay drive circuit and transfer relay drive circuit connects the signal output part of single-chip microcomputer respectively.The utility model is eliminated safe hidden trouble by the method switching zero live wire simultaneously, and security performance is superior.
Description
[technical field]
The utility model relates to power converter control circuit, particularly relates to a kind of civil power input and inversion output switching circuit of power converter.
[background technology]
The handoff functionality of power converter mainly switches electrical network input and inversion exports, and power converter needs direct current to input and civil power input, if only have direct current to input, when the electricity of direct-flow input end accumulators store is finished time, load will power down.If now there is civil power to input, when the electricity of accumulators store is finished time, the output of inverter can be switched on electrical network automatically by commutation circuit, carrys out powering load by electrical network.
Traditional power converter commutation circuit as shown in Figures 1 to 4, comprises main commutation circuit, civil power input detecting circuit, inverter signal testing circuit and single-chip microcomputer U18.
In FIG, the main devices transfer relay RLY3 of main commutation circuit, be relay coil between 2 pin of relay R LY3 and 5 pin, 3 pin are normally opened contacts, and 4 pin are normally-closed contacts, and 1 pin is moving contact and common.
The drive circuit of relay R LY3 comprises triode Q1 and resistance R1.Power supply+the 12V of relay R LY3 coil receives 2 pin, C27 and C12 is filter capacitor, voltage-stabiliser tube ZD1 is the voltage clamping of triode Q1, because an inverse electromotive force can be produced when the coil blackout of relay R YL3 and have a very high spike, the voltage stabilizing value ZD1 that peak voltage exceedes voltage-stabiliser tube just punctures voltage clamping in the voltage stabilizing value of voltage-stabiliser tube, ensures that triode is not breakdown.
In Fig. 1, AC INPUT L is civil power input live wire, AC INPUT N is civil power input zero line, AC INPUTG0NDP is ground wire.AC OUTPUT L is that interchange exports live wire, AC OUTPUT N exchanges the ground wire exporting zero line, AC OUTPUT GNDP output.INVERTER INPUT L is that inversion exports live wire, and INVERTERINPUT N is that inversion exports zero line.
Electric capacity C120 and C121 be connected between the zero line of civil power input and live wire be X electric capacity its act on be suppresses differential mode interference, be connected on the live wire of civil power input and ground wire and electric capacity C126 and C122 between zero line and ground wire and C127 and C123 be Y capacitance its to act on be suppression common mode disturbances.
When making electricity container to abate the noise in power supply cross-line circuit, not only only having normal voltage, also must consider the generation of abnormal pulse voltage (as thunderbolt), this may cause capacitor to be smoldered or on fire.So the safety standard of cross-line capacitor for there are strict requirements at country variant, therefore must use the capacitor through safety certification.
The element MOV1 be connected between civil power input zero line and live wire is piezo-resistance, is commonly called as surge absorber.When humorous wave interference between zero line and live wire is greater than the threshold voltage of MOV1, its resistance diminishes suddenly, and too high voltage consumption with it this, its resistance is very large under normal circumstances.Its effect of X electric capacity C128 and Y capacitance C29, C130 being connected on output is identical with the X electric capacity Y capacitance being connected on input port.
As shown in Figure 3, in civil power input detecting circuit, the differential amplifier circuit be made up of amplifier U2A and relevant components and parts.Civil power input live wire AC INPUT L delivers to 2 pin (inverting input) of U2A by resistance R225, civil power input zero line is by 3 pin (in-phase input end) delivering to U2A after resistance R227 and resistance R226 dividing potential drop, feedback resistance R228 and R100, feeds back to the output signal of U2A on 2 pin of U2A.After AC INPUTL and AC INPUT N port access civil power, the 1 pin output amplitude of U2A is the sine wave of 5V.
What be made up of U2B and relevant components and parts is full-bridge precise rectification circuit, R63 delivers to 6 pin (inverting input) of U2B the signal that U2A output (1 pin) exports, R101 is feedback resistance, when 6 pin are input as sinusoidal wave positive half cycle, the output (7 pin) of U2B exports as negative half period, positive half cycle is by R101 to port LINE.V now D45 cut-off, and R101 is coupling resistance U2B and is operated in open loop situations.When 6 pin are input as sinusoidal wave negative half period, 7 pin of U2B export as positive half cycle, D45 conducting, and now U2B is operated in closed loop states, and port LINE.V obtains sinusoidal wave positive half cycle, and D46 is by counter 6 pin being poured into U2B of positive half cycle preventing 7 pin of U2B from exporting.See to obtain the sine wave that inputted by 6 pin of U2B obtains through precise rectification circuit rear port LINE.V is the pulsating direct current of 100HZ thus.
Another road signal that the output (1 pin) of U2A exports is to the base stage of Q10, the triode Q10 saturation conduction when Q10 base stage is sinusoidal wave positive half cycle, port LINE.ZC is 0V, and the triode Q10 cut-off when the base stage of Q10 is sinusoidal wave negative half period, port LINE.ZC is 5V.The pulse signal (as zero cross signal) of 50HZ/5V is obtained at port LINE.ZC.
As shown in Figure 2, inverter signal testing circuit is full-wave rectifying circuit, port INVERTER INPUT L and port INVERTER INPUT N connects the output of inverter, after diode D11 and D12 rectification, after resistance R179 and R177, R178 dividing potential drop, port INV.V obtains voltage lower than 5V, and frequency is the pulsating direct current of 100HZ.
Control circuit forms primarily of single-chip microcomputer U18, in the diagram, single-chip microcomputer U18 is only shown with four pin: the LINE.ZC (civil power incoming frequency detection signal-input pin), the LINE.V (mains input voltage detection signal-input pin) that close required for commutation circuit, INV.V (inversion detection signal-input pin), O/P.RLY (relay control signal-output pin).
When inverter normally works, the port INV.V of single-chip microcomputer U18 obtains normal inversion detection signal; When not having civil power to input, civil power inputting testing terminal LINE.ZC and LINE.V can not get normal signal, port O/P.RLY attonity, namely exports as 0V.After inverter access civil power, civil power inputting testing terminal LINE.ZC obtains normal zero cross signal, single-chip microcomputer is inner for locking the computing of civil power phase place, port LINE.V obtains the pulsating direct current of 100HZ, single-chip microcomputer is inner for calculating mains input voltage value, follow the tracks of when single-chip microcomputer and lock civil power phase place, and mains input voltage is in normal range (NR), now port O/P.RLY exports 5V high level.
Main commutation circuit, inverter normally works, and because one-chip machine port O/P.RLY exports as 0V is so triode Q1 base voltage is 0V when not having civil power to input, triode Q1 is operated in by state, and relay coil no current flows through relay is failure to actuate.Because inversion exports FireWire port port INVERTER INPUT, L is connected on the normally-closed contact 4 of relay, relay 1 pin exports as inversion exports live wire, it is directly receive to export on zero line that inversion exports zero line, so the point that now output port AC OUTPUT L and AC OUTPUT N exports is the alternating current that inversion exports.Inverter normally worked civil power input time due to one-chip machine port O/P.RLY export for 5V so triode Q1 base voltage is 5V, triode operation is in conducting state, and relay coil has electric current to flow through the actuating of relay.Relay contacts 1 jumps on 3 by 4, exporting FireWire port port AC OUTPUT L is connected on the live wire of civil power input, civil power input zero line directly receives to export on zero line, so the point that now output port AC OUTPUT L and AC OUTPUT N exports is the alternating current of civil power input.
There is potential safety hazard in traditional power converter commutation circuit, directly civil power input zero line inversion is exported zero line and exchanges output zero line to be directly connected in circuit, if user also becomes the zero line that the zero line that civil power inputs is connected into live wire so output into live wire, this phenomenon probably threatens personal life security.
[summary of the invention]
The technical problems to be solved in the utility model is to provide civil power input and the inversion output switching circuit of the good power converter of a kind of fail safe.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of civil power input and inversion output switching circuit of power converter, comprise main commutation circuit, civil power input detecting circuit, inverter signal testing circuit and single-chip microcomputer, the signal output part of civil power input detecting circuit and inverter signal testing circuit connects signal input part corresponding to single-chip microcomputer respectively, main commutation circuit comprises output relay and two transfer relays, the normally-closed contact of the first transfer relay connects inversion and exports live wire, normally opened contact connects civil power input live wire, common connects the first contact of output relay, second contact of output relay connects to exchange and exports live wire, the normally-closed contact of the second transfer relay connects inversion and exports zero line, and normally opened contact connects civil power input zero line, and common connects to exchange and exports zero line, the control signal input of output relay drive circuit connects single-chip microcomputer first control signal output, and the control signal input of transfer relay drive circuit connects single-chip microcomputer second control signal output.
Above-described civil power input and inversion output switching circuit, inverter signal testing circuit comprises the first diode, the second diode, the first resistance and the second resistance, inversion exports live wire and connects the first diode anode, inversion exports zero line and connects the second diode anode, the negative electrode of the first diode and the second diode connects the first end of the first resistance, the first end of the first resistance is by the second grounding through resistance, and the second end of the first resistance connects the inversion detection signal input of single-chip microcomputer as inverter signal testing circuit signal output part.
Above-described civil power input and inversion output switching circuit, civil power input detecting circuit comprises the first amplifier and the second amplifier, civil power input live wire connects the inverting input of the first amplifier by the 3rd resistance, civil power input zero line is by the 4th resistance and the in-phase input end connecing the first amplifier, the in-phase input end of the first amplifier passes through the 5th grounding through resistance, between the output that feedback resistance is connected on the first amplifier and inverting input; The base stage of output termination first triode of the first amplifier, the collector electrode of the first triode connects chip power, grounded emitter by the 6th resistance, and the collector electrode of the first triode connects single-chip microcomputer civil power incoming frequency detection signal input; First amplifier output connects the inverting input of the second amplifier by the 8th resistance, the in-phase input end ground connection of the second amplifier; The anode of the 3rd diode connects the output of the second amplifier, and the negative electrode of the 3rd diode connects the inverting input of the second amplifier by the second feedback resistance; The anode of anti-phase input termination the 4th diode of the second amplifier, the negative electrode of the 4th diode connects the output of the second amplifier; The negative electrode of the 3rd diode connects the mains input voltage detection signal input of single-chip microcomputer.
Above-described civil power input and inversion output switching circuit, output relay drive circuit comprises the second triode, the first end contact relay power supply of output relay coil, the collector electrode of the second termination second triode; The grounded emitter of the second triode, base stage connects the first control signal output of single-chip microcomputer.
Above-described civil power input and inversion output switching circuit, output relay drive circuit comprises clamp voltage-stabiliser tube, and the negative electrode of clamp voltage-stabiliser tube connects the collector electrode of the second triode, plus earth.
Above-described civil power input and inversion output switching circuit, output relay drive circuit comprises filter capacitor, the first end of a termination output relay coil of filter capacitor, other end ground connection.
Above-described civil power input and inversion output switching circuit, the coils from parallel connection of coils of two transfer relays, transfer relay drive circuit comprises the 3rd triode, the first end contact relay power supply of two transfer relay coils, the collector electrode of the second termination the 3rd triode; The grounded emitter of the 3rd triode, base stage connects the second control signal output of single-chip microcomputer.
Above-described civil power input and inversion output switching circuit, transfer relay drive circuit comprises the second clamp voltage-stabiliser tube, and the negative electrode of the second clamp voltage-stabiliser tube connects the collector electrode of the 3rd triode, plus earth.
Above-described civil power input and inversion output switching circuit, transfer relay drive circuit comprises acceleration breaking circuit, accelerate breaking circuit and comprise PNP triode, electrochemical capacitor, the 5th diode and the 6th diode, the negative electrode of the 5th diode connects the first end of two transfer relay coils, anode contact relay power supply; The positive pole of electrochemical capacitor connects the first end of two transfer relay coils, and negative pole is by the 7th grounding through resistance; The emitter contact relay power supply of PNP triode, collector electrode connects the negative pole of electrochemical capacitor, base earth; The plus earth of the 6th diode, negative electrode connects the emitter of PNP triode.
The utility model is eliminated safe hidden trouble by the method switching zero live wire simultaneously; output relay loads on the live wire of output; normally do not working or output can cut off rapidly under having failure condition; guarantee that the equipment of user is thoroughly separated with inverter, the equipment of protection user does not damage by the fault of inverter.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the schematic diagram of the main commutation circuit of prior art.
Fig. 2 is the schematic diagram of prior art and the utility model embodiment inverter signal testing circuit.
Fig. 3 is the schematic diagram of prior art and the utility model embodiment civil power input detecting circuit.
Fig. 4 is the wiring schematic diagram of prior art single-chip microcomputer.
Fig. 5 is the schematic diagram of the main commutation circuit of the utility model embodiment.
Fig. 6 is the wiring schematic diagram of the utility model embodiment single-chip microcomputer.
[embodiment]
The power converter commutation circuit of the utility model embodiment, as shown in Fig. 2, Fig. 3, Fig. 5 and Fig. 6, comprises main commutation circuit, civil power input detecting circuit, inverter signal testing circuit and the single-chip microcomputer U18 as control circuit.
In Figure 5, AC INPUT L is that civil power inputs live wire, AC INPUT N is civil power input zero line, ACINPUT G0NDP is ground wire.AC OUTPUT L is that interchange exports live wire, AC OUTPUT N exchanges the ground wire exporting zero line, AC OUTPUT GNDP output.INVERTER INPUT L is that inversion exports live wire, and INVERTER INPUT N is that inversion exports zero line.
Electric capacity C120 and C121 be connected between the zero line of civil power input and live wire be X electric capacity its act on be suppresses differential mode interference, be connected on the live wire of civil power input and ground wire and electric capacity C126 and C122 between zero line and ground wire and C127 and C123 be Y capacitance its to act on be suppression common mode disturbances.
When making electricity container to abate the noise in power supply cross-line circuit, not only only having normal voltage, also must consider the generation of abnormal pulse voltage (as thunderbolt), this may cause capacitor to be smoldered or on fire.So the safety standard of cross-line capacitor for there are strict requirements at country variant, therefore must use the capacitor through safety certification.
The element MOV1 be connected between civil power input zero line and live wire is piezo-resistance, is commonly called as surge absorber.When humorous wave interference between zero line and live wire is greater than the threshold voltage of MOV1, its resistance diminishes suddenly, and too high voltage consumption with it this, its resistance is very large under normal circumstances.Its effect of X electric capacity C128 and Y capacitance C29, C130 being connected on output is identical with the X electric capacity Y capacitance being connected on input port.
As shown in Figure 3, in civil power input detecting circuit, the differential amplifier circuit be made up of amplifier U2A and relevant components and parts.Civil power input live wire AC INPUT L delivers to 2 pin (inverting input) of U2A by resistance R225, civil power input zero line is by 3 pin (in-phase input end) delivering to U2A after resistance R227 and resistance R226 dividing potential drop, feedback resistance R228 and R100, feeds back to the output signal of U2A on 2 pin of U2A.After AC INPUTL and AC INPUT N port access civil power, the 1 pin output amplitude of U2A is the sine wave of 5V.
What be made up of U2B and relevant components and parts is full-bridge precise rectification circuit, R63 delivers to 6 pin (inverting input) of U2B the signal that U2A output (1 pin) exports, R101 is feedback resistance, when 6 pin are input as sinusoidal wave positive half cycle, the output (7 pin) of U2B exports as negative half period, positive half cycle is by R101 to port LINE.V now D45 cut-off, and R101 is coupling resistance U2B and is operated in open loop situations.When 6 pin are input as sinusoidal wave negative half period, 7 pin of U2B export as positive half cycle, D45 conducting, and now U2B is operated in closed loop states, and port LINE.V obtains sinusoidal wave positive half cycle, and D46 is by counter 6 pin being poured into U2B of positive half cycle preventing 7 pin of U2B from exporting.See to obtain the sine wave that inputted by 6 pin of U2B obtains through precise rectification circuit rear port LINE.V is the pulsating direct current of 100HZ thus.
Another road signal that the output (1 pin) of U2A exports is to the base stage of Q10, the triode Q10 saturation conduction when Q10 base stage is sinusoidal wave positive half cycle, port LINE.ZC is 0V, and the triode Q10 cut-off when the base stage of Q10 is sinusoidal wave negative half period, port LINE.ZC is 5V.The pulse signal (as zero cross signal) of 50HZ/5V is obtained at port LINE.ZC.
As shown in Figure 2, inverter signal testing circuit is full-wave rectifying circuit, port INVERTER INPUT L and port INVERTER INPUT N connects the output of inverter, after diode D11 and D12 rectification, after resistance R176 and R177, R178 dividing potential drop, port INV.V obtains voltage lower than 5V, and frequency is the pulsating direct current of 100HZ, R197 is the dummy load that inversion exports, and actual parameter is 100K/3W.
Control circuit forms primarily of single-chip microcomputer U18, in the diagram, single-chip microcomputer U18 is only shown with the output pin of 5 pin: the LINE.ZC (civil power incoming frequency detection signal input pin), the LINE.V (mains input voltage detection signal-input pin) that close required for commutation circuit, INV.V (inversion detection signal input pin), O/P.RLY (relay control signal output pin) and MAIN.RLY transfer relay control signal).
When inverter normally works, the port INV.V of single-chip microcomputer U18 obtains normal inversion detection signal; When not having civil power to input, civil power inputting testing terminal LINE.ZC and LINE.V can not get normal signal, port O/P.RLY attonity, namely exports as 0V.After inverter access civil power, civil power inputting testing terminal LINE.ZC obtains normal zero cross signal, single-chip microcomputer is inner for locking the computing of civil power phase place, port LINE.V obtains the pulsating direct current of 100HZ, single-chip microcomputer is inner for calculating mains input voltage value, follow the tracks of when single-chip microcomputer and lock civil power phase place, now port MAIN.RLY exports 5V high level to relay R LY3, no matter single-chip microcomputer U18 detect inverter signal or ac input signal normal, port O/P.RLY will export 5V, otherwise this port exports 0V.
The drive circuit of transfer relay RLY3 comprises triode Q1 and resistance R1.Relay coil between 2 pin of relay R LY3 and 5 pin, power supply+the 12V of relay R LY3 coil receives 2 pin of coil, C27 and C12 is filter capacitor, voltage-stabiliser tube ZD1 is used for the voltage clamping of triode Q1, because an inverse electromotive force can be produced when the coil blackout of relay R YL3 and have a very high spike, the voltage stabilizing value that peak voltage exceedes voltage-stabiliser tube ZD1 just punctures voltage clamping in the voltage stabilizing value of voltage-stabiliser tube, ensures that triode is not breakdown.
The drive circuit of relay R LY1 and RLY2 comprises triode Q2 and resistance R114, RJ3.Power supply+the 12V of relay R LY1 and RLY2 coil receives 5 pin of coil by diode DJ2, CJ1 and CJ2 is filter capacitor, voltage-stabiliser tube ZD16 is the voltage clamping of triode Q2, because an inverse electromotive force can be produced when the coil blackout of relay R LY1 and RLY2 and have a very high spike, the voltage stabilizing value ZD16 that peak voltage exceedes voltage-stabiliser tube just punctures voltage clamping in the voltage stabilizing value of voltage-stabiliser tube, ensures that triode is not breakdown.Triode QJ1, resistance RJ2, RJ1, diode DJ1 are the acceleration breaking circuits of relay R LY1 and RLY2.
Inverter normally works because one-chip machine port MAIN.RLY exports as 0V, triode Q2 base voltage is 0V when not having civil power to input, and triode operation is by state, and relay coil no current flows through relay is failure to actuate.
Because inversion exports FireWire port port INVERTER INPUT, L is connected on the normally-closed contact 4 of relay R LY1, inversion exports zero line port INVERTER INPUT L and is connected on the normally-closed contact 4 of relay R LY2,1 pin of relay R LY1 exports as inversion exports live wire, when microprocessor detect is normal to inverter signal, the port O/P.RLY of single-chip microcomputer U18 exports 5V high level, output relay RLY3 coil has electric current to flow through, the actuating of relay, contact 1 is connected with 3, and output port AC OUTPUT L exports as inversion exports INVERTERINPUT L.1 pin of relay R LY2 exports, for inversion exports zero line, so the electricity that now output port AC OUTPUTL and AC OUTPUT N exports is the alternating current that inversion exports.
Because one-chip machine port MAIN.RLY exports as 5V, triode Q2 base voltage is 5V when inverter normally works and has civil power to input, triode Q2 is operated in conducting state, and the coil of relay R LY1 and RLY2 has electric current to flow through, the actuating of relay.The contact 1 of relay R LY1 and RLY2 is jumped on 3 by 4, now the contact 1 of relay R LY3 and contact 3 are still in attracting state, exporting FireWire port port AC OUTPUT L is connected on the live wire of civil power input, export zero line port AC OUTPUT N to be connected on the zero line of civil power input, so the point that now output port AC OUTPUT L and AC OUTPUT N exports is the alternating current of civil power input.
The above embodiment of the utility model is eliminated safe hidden trouble by the method switching zero live wire simultaneously, and output relay loads on the live wire that exports, is not normally working or can cut off output rapidly under having failure condition.Guarantee that the equipment of user is thoroughly separated with inverter, the equipment of protection user does not damage by the fault of inverter.
Claims (9)
1. the civil power of a power converter inputs and inversion output switching circuit, comprise main commutation circuit, civil power input detecting circuit, inverter signal testing circuit and single-chip microcomputer, the signal output part of civil power input detecting circuit and inverter signal testing circuit connects signal input part corresponding to single-chip microcomputer respectively, it is characterized in that, main commutation circuit comprises output relay and two transfer relays, the normally-closed contact of the first transfer relay connects inversion and exports live wire, normally opened contact connects civil power input live wire, common connects the first contact of output relay, second contact of output relay connects to exchange and exports live wire, the normally-closed contact of the second transfer relay connects inversion and exports zero line, and normally opened contact connects civil power input zero line, and common connects to exchange and exports zero line, the control signal input of output relay drive circuit connects single-chip microcomputer first control signal output, and the control signal input of transfer relay drive circuit connects single-chip microcomputer second control signal output.
2. civil power input according to claim 1 and inversion output switching circuit, it is characterized in that, inverter signal testing circuit comprises the first diode, the second diode, the first resistance and the second resistance, inversion exports live wire and connects the first diode anode, inversion exports zero line and connects the second diode anode, the negative electrode of the first diode and the second diode connects the first end of the first resistance, the first end of the first resistance is by the second grounding through resistance, and the second end of the first resistance connects the inversion detection signal input of single-chip microcomputer as inverter signal testing circuit signal output part.
3. civil power input according to claim 1 and inversion output switching circuit, it is characterized in that, civil power input detecting circuit comprises the first amplifier and the second amplifier, civil power input live wire connects the inverting input of the first amplifier by the 3rd resistance, civil power input zero line is by the 4th resistance and the in-phase input end connecing the first amplifier, the in-phase input end of the first amplifier passes through the 5th grounding through resistance, between the output that feedback resistance is connected on the first amplifier and inverting input; The base stage of output termination first triode of the first amplifier, the collector electrode of the first triode connects chip power, grounded emitter by the 6th resistance, and the collector electrode of the first triode connects single-chip microcomputer civil power incoming frequency detection signal input; First amplifier output connects the inverting input of the second amplifier by the 8th resistance, the in-phase input end ground connection of the second amplifier; The anode of the 3rd diode connects the output of the second amplifier, and the negative electrode of the 3rd diode connects the inverting input of the second amplifier by the second feedback resistance; The anode of anti-phase input termination the 4th diode of the second amplifier, the negative electrode of the 4th diode connects the output of the second amplifier; The negative electrode of the 3rd diode connects the mains input voltage detection signal input of single-chip microcomputer.
4. civil power input according to claim 1 and inversion output switching circuit, it is characterized in that, output relay drive circuit comprises the second triode, the first end contact relay power supply of output relay coil, the collector electrode of the second termination second triode; The grounded emitter of the second triode, base stage connects the first control signal output of single-chip microcomputer.
5. civil power input according to claim 4 and inversion output switching circuit, it is characterized in that, output relay drive circuit comprises clamp voltage-stabiliser tube, and the negative electrode of clamp voltage-stabiliser tube connects the collector electrode of the second triode, plus earth.
6. civil power input according to claim 5 and inversion output switching circuit, it is characterized in that, output relay drive circuit comprises filter capacitor, the first end of a termination output relay coil of filter capacitor, other end ground connection.
7. civil power input according to claim 1 and inversion output switching circuit, it is characterized in that, the coils from parallel connection of coils of two transfer relays, transfer relay drive circuit comprises the 3rd triode, the first end contact relay power supply of two transfer relay coils, the collector electrode of the second termination the 3rd triode; The grounded emitter of the 3rd triode, base stage connects the second control signal output of single-chip microcomputer.
8. civil power input according to claim 7 and inversion output switching circuit, it is characterized in that, transfer relay drive circuit comprises the second clamp voltage-stabiliser tube, and the negative electrode of the second clamp voltage-stabiliser tube connects the collector electrode of the 3rd triode, plus earth.
9. civil power input according to claim 7 and inversion output switching circuit, it is characterized in that, transfer relay drive circuit comprises acceleration breaking circuit, accelerate breaking circuit and comprise PNP triode, electrochemical capacitor, the 5th diode and the 6th diode, the negative electrode of the 5th diode connects the first end of two transfer relay coils, anode contact relay power supply; The positive pole of electrochemical capacitor connects the first end of two transfer relay coils, and negative pole is by the 7th grounding through resistance; The emitter contact relay power supply of PNP triode, collector electrode connects the negative pole of electrochemical capacitor, base earth; The plus earth of the 6th diode, negative electrode connects the emitter of PNP triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533159.5U CN204231011U (en) | 2014-09-16 | 2014-09-16 | A kind of civil power input and inversion output switching circuit of power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533159.5U CN204231011U (en) | 2014-09-16 | 2014-09-16 | A kind of civil power input and inversion output switching circuit of power converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204231011U true CN204231011U (en) | 2015-03-25 |
Family
ID=52929061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420533159.5U Expired - Fee Related CN204231011U (en) | 2014-09-16 | 2014-09-16 | A kind of civil power input and inversion output switching circuit of power converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204231011U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305606A (en) * | 2015-11-25 | 2016-02-03 | 江永县元杰科技有限公司 | Self-powered monitoring device in power outage |
| CN108964246A (en) * | 2018-07-25 | 2018-12-07 | 郑州云海信息技术有限公司 | A kind of method for switching main and standby power supplies and system of test equipment |
-
2014
- 2014-09-16 CN CN201420533159.5U patent/CN204231011U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305606A (en) * | 2015-11-25 | 2016-02-03 | 江永县元杰科技有限公司 | Self-powered monitoring device in power outage |
| CN108964246A (en) * | 2018-07-25 | 2018-12-07 | 郑州云海信息技术有限公司 | A kind of method for switching main and standby power supplies and system of test equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204205552U (en) | The under-voltage over-voltage detection circuit of a kind of AC | |
| CN201590645U (en) | AC input over-voltage and under-voltage protection device for electric apparatus | |
| CN201262636Y (en) | Grounding checkout device for DC system | |
| CN103066559B (en) | Power-off protector | |
| CN102638024B (en) | Interruption line protector | |
| CN204190353U (en) | A kind of household electrical appliance automatic overvoltage power off device | |
| CN204231011U (en) | A kind of civil power input and inversion output switching circuit of power converter | |
| CN105356588A (en) | Control method for switching UPS output mode | |
| CN204515032U (en) | A kind of proving installation of energy feedback unit | |
| CN201956686U (en) | Active power filtering device | |
| CN204809852U (en) | Phase loss protection circuit among high -power switching power supply of three -phase | |
| CN203774767U (en) | Cut-off type fault protection circuit of unity power factor boost converter | |
| CN203243019U (en) | Power-off protector | |
| CN204559106U (en) | A kind of convertible frequency air-conditioner and electrolytic capacitor overvoltage crowbar thereof | |
| CN207410037U (en) | A kind of intelligent anti-over under-voltage protection circuit | |
| CN202435637U (en) | Zero-power-consumption standby control circuit of electromagnetic induction heating device | |
| CN206432779U (en) | A kind of high ferro signal station fast switch type stand-by heat inverter | |
| CN108767974A (en) | A kind of power supply automatic switchover circuit of charged pool undervoltage turnoff | |
| CN206020543U (en) | Three-phase lack phase detection circuit and electrical equipment | |
| CN204258264U (en) | A kind of transformer neutral point condenser type is every straight device | |
| CN205720457U (en) | A kind of stable intelligent relay-protection tester of powering | |
| CN202002975U (en) | Three-phase low power consumption cost-control intelligent watt-hour meter based on zero line judging switching power supply | |
| CN105429259A (en) | Single-phase rectification charging circuit | |
| CN205304385U (en) | A switching circuit | |
| CN204809839U (en) | Electric leakage circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20190916 |