CN203760387U - Synchronous switch - Google Patents
Synchronous switch Download PDFInfo
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- CN203760387U CN203760387U CN201420178611.0U CN201420178611U CN203760387U CN 203760387 U CN203760387 U CN 203760387U CN 201420178611 U CN201420178611 U CN 201420178611U CN 203760387 U CN203760387 U CN 203760387U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to a synchronous switch. The synchronous switch comprises a phase detecting circuit, a central controller, an auxiliary switching circuit and a main switching circuit, wherein the auxiliary switching circuit comprises a voltage zero crossing detector and a switch unit; the voltage zero crossing detector is used for automatically detecting a voltage zero crossing point; by using the voltage zero crossing detector, the auxiliary switching circuit is switched on; the switch unit is used for receiving a first control signal and is connected with the voltage zero crossing detector; the voltage zero crossing detector is serially connected with the switch unit; and the switch unit is connected with the central controller. The switch unit is switched on within positive half wave time, a power capacitor comes into service by using the auxiliary switching circuit, the main switching circuit is switched on, real inrush current service of the power capacitor is realized, action time of the synchronous switch is prolonged from point control to half wave time control, and the control difficulty of the synchronous switch is greatly reduced.
Description
Technical field
The utility model relates to power capacitor no-flashy-flow switching technical field, relates in particular to a kind of synchro switch.
Background technology
Synchro switch, for controlling the moment closure that three-phase power capacitor is zero in make and break contact both end voltage, thereby the no-flashy-flow of realizing power capacitor drops into, but synchro switch is the combination of mechanical switch and electronic switch, no-flashy-flow while realizing synchro switch input, to detect accurately voltage over zero on the one hand, and the control information of sending in time voltage over zero, the opposing party, ensure the mechanical property of synchro switch, make it accurately closed in the time of voltage over zero.But, the mechanical property stability of existing synchro switch is not high, if the mechanical property of synchro switch changes or occur the error of controlling when zero crossing, the generation of shoving all may cause power capacitor to drop into time, therefore, existing synchro switch exists and is difficult to the problem that accurate control switch drops at two ends isopiestic point.
At present, the closing time that also has proposition to promote magnetic latching relay by improving magnetic latching relay driving voltage solves the problems referred to above, drops at switch ends voltage over zero by lifting switch operate time and control switch.But, above-mentioned control method, still keeps away the problem that unavoidably need to ensure synchro switch mechanical property, or needs the accurate voltage over zero that detects, that is to say that cannot accurately be controlled at switch ends isopiestic point drops into, capacitor still has four times of above generations of shoving while input.
Summary of the invention
Technical problem to be solved in the utility model is to exist and be difficult to accurately the problems referred to above of dropping into when the switch ends isopiestic point for existing synchro switch, provide a kind of control difficulty low, drop into no-flashy-flow, only need in hemiwave time, drop into a kind of synchro switch of power capacitor.
For addressing the above problem, the technical solution of the utility model is:
A kind of synchro switch, described synchro switch comprises for detection of single phase poaer supply voltage-phase and exports positive half wave detection signal and the phase detecting circuit of negative half-wave detection signal, be used for the central controller that receives positive half wave detection signal and negative half-wave detection signal and export corresponding the first control signal and the second control signal, for receiving the first control signal and automatically detecting the auxiliary switching circuit of voltage over zero and for receiving the second control signal and dropping into the main switching circuit of power capacitor, main switching circuit, auxiliary switching circuit and phase detecting circuit are connected on respectively between single phase poaer supply and power capacitor, phase detecting circuit, main switching circuit is all connected with central controller with auxiliary switching circuit, described auxiliary switching circuit comprise for automatically detect voltage over zero and when the voltage over zero the auxiliary switching circuit of conducting voltage zero-crossing detector and for receiving the first control signal and being communicated with the switch element of voltage zero-crossing detector, voltage zero-crossing detector is connected with switch element, and switch element is connected with central controller.
Preferably, described voltage zero-crossing detector is diode, and switch element is power relay, and voltage zero-crossing detector is connected with single phase poaer supply, and switch element is connected with power capacitor, diode by power capacitor to the conducting of single phase poaer supply direction.
Preferably, described main switching circuit is magnetic freeze mode relay, and magnetic freeze mode relay is connected with central controller.
Preferably, described voltage-phase testing circuit comprises photoelectrical coupler U1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and diode D5, the first resistance R 1, after diode D5 and the second resistance R 2 are in sequential series, be connected in parallel on the two ends of auxiliary switching circuit, diode D5 by single phase poaer supply to the conducting of power capacitor direction, in photoelectrical coupler U1, two inputs of light-emitting diode are connected in parallel on diode D5, light-emitting diode by power capacitor to the conducting of single phase poaer supply direction, the grounded emitter of triode in photoelectrical coupler U1, the collector electrode of triode is connected with power supply by the 3rd resistance R 3, the collector electrode of triode is connected with central controller, the collector electrode of triode is used for exporting positive half wave detection signal and negative half-wave detection signal.
Preferably, described synchro switch also comprises for detection of power capacitor inside and shoving and the testing circuit that shoves of output feedback signal, the input of testing circuit of shoving is connected to the junction of main switching circuit and power capacitor, and the output of the testing circuit that shoves is connected with central controller.
Preferably, the described testing circuit that shoves comprises for regulating the charging interval and controlling the first unidirectional charging circuit of output voltage, be used for the second unidirectional charging circuit that regulates the charging interval and control output voltage, comparator and output control unit, the input of the first unidirectional charging circuit and the second unidirectional charging circuit is connected with the junction of main switching circuit and power capacitor, the output of the first unidirectional charging circuit and the second unidirectional charging circuit is connected with two inputs of comparator respectively, the output of comparator is connected with output control unit, output control unit is connected with central controller.
Preferably, described the first unidirectional charging circuit comprises diode D1, the 4th resistance R 4, the 5th resistance R 5 and the first capacitor C 1, diode D1, the 4th resistance R 4 and the 5th resistance R 5 are connected in turn, the other end ground connection of the 5th resistance R 5, the input of diode D1 is the input of the first unidirectional charging circuit, diode D1 by the input of the first unidirectional charging circuit to the 4th resistance R 4 direction conductings, the first capacitor C 1 is connected in parallel on the two ends of the 5th resistance R 5, and the junction of the 4th resistance R 4 and the first capacitor C 1 is the output of the first unidirectional charging circuit; Described the second unidirectional charging circuit comprises diode D2, the 6th resistance R 6, the 7th resistance R 7 and the second capacitor C 2, diode D2, the 6th resistance R 6 and the 7th resistance R 7 are connected in turn, the other end ground connection of the 7th resistance R 7, the input of diode D2 is the input of the second unidirectional charging circuit, diode D2 by the input of the second unidirectional charging circuit to the 6th resistance R 6 direction conductings, the second capacitor C 2 is connected in parallel on the two ends of the 7th resistance R 7, and the junction of the 6th resistance R 6 and the second capacitor C 2 is the output of the second unidirectional charging circuit; Described output control unit comprises the diode D3, the 8th resistance R 8 and the 9th resistance R 9 that connect in turn, the other end ground connection of the 9th resistance R 9, diode D3 is connected on the output of comparator, diode D3 is by comparator to the 8th resistance R 8 direction conductings, and the 8th resistance R 8 is connected with central controller with the junction of the 9th resistance R 9.
Be compared to prior art, synchro switch of the present utility model adopts double-mechanical switch control mode, by first Closing Switch unit within the positive half wave time, utilize voltage zero-crossing detector automatically to detect in real time voltage over zero, while making switch ends voltage over zero, utilize auxiliary switching circuit to drop into power capacitor, and in negative hemiwave time, be communicated with main switching circuit, the real no-flashy-flow of realizing power capacitor drops into, also extend to hemiwave time control by point control the operate time of synchro switch, greatly reduces the control difficulty of synchro switch; The utility model has been avoided because the variation of synchro switch mechanical property causes the phenomenon of shoving, and in the time dropping into, neither damages fling-cut switch, does not also damage power capacitor, has extended the useful life of switch and power capacitor.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of the utility model synchro switch.
Fig. 2 is the schematic block circuit diagram of testing circuit of shoving in the utility model synchro switch.
Fig. 3 is the local circuit schematic diagram of the utility model synchro switch.
Fig. 4 is the circuit theory diagrams of testing circuit of shoving in the utility model synchro switch.
Embodiment
Further describe the utility model below in conjunction with drawings and Examples, but protection range of the present utility model is not limited to this.
With reference to Fig. 1, synchro switch of the present utility model comprises main switching circuit, auxiliary switching circuit, phase detecting circuit, central controller and the testing circuit that shoves, main switching circuit, auxiliary switching circuit and phase detecting circuit are connected on respectively between single phase poaer supply and power capacitor, main switching circuit, auxiliary switching circuit and phase detecting circuit are connected in parallel to each other, phase detecting circuit, main switching circuit is all connected with central controller with auxiliary switching circuit, the input of testing circuit of shoving is connected to the junction of main switching circuit and power capacitor, the output of testing circuit of shoving is connected with central controller.
With reference to Fig. 3, described phase detecting circuit is for detection of single phase poaer supply voltage-phase and export positive half wave detection signal and negative half-wave detection signal, and phase detecting circuit is for the sequencing control of power capacitor input process.If it is 0 °≤φ <180 ° that phase detecting circuit detects the phase of single phase poaer supply voltage, and when the rising edge signal of single phase poaer supply voltage detected, phase detecting circuit output positive half wave detection signal is in central controller, if detect when the phase of single phase poaer supply voltage is <360 ° of 180 °≤φ, the negative half-wave detection signal of phase detecting circuit output.Wherein, voltage-phase testing circuit comprises photoelectrical coupler U1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and diode D5, the first resistance R 1, after diode D5 and the second resistance R 2 are in sequential series, be connected in parallel on the two ends of auxiliary switching circuit, the first resistance R 1 and the second resistance R 2 play the effect of current limliting, diode D5 by single phase poaer supply to the conducting of power capacitor direction, in photoelectrical coupler U1, two inputs of light-emitting diode are connected in parallel on diode D5, light-emitting diode by power capacitor to the conducting of single phase poaer supply direction, the grounded emitter of triode in photoelectrical coupler U1, the collector electrode of triode is connected with power supply by the 3rd resistance R 3, the collector electrode of triode is connected with central controller, the collector electrode of triode is used for exporting positive half wave detection signal and negative half-wave detection signal.Due to the restriction of phase detecting circuit particular circuit configurations, cause phase detecting circuit in the time of negative half-wave, to continue output high level signal, therefore in the time judging, need central controller to postpone as judgement according to rising edge signal backward, after 10ms after rising edge signal is the half-wave voltage signal duration, be judged as the beginning of negative half-wave voltage signal.
Phase detecting circuit is in the time detecting, and output signal ZERO, in central controller, judges tracking by central controller, and signal ZERO comprises positive half wave detection signal and negative half-wave detection signal, and signal ZERO marks out in Fig. 3.When the voltage at main switching circuit two ends is timing, photoelectrical coupler U1 cut-off, signal ZERO is signal Vdd, i.e. power supply signal, namely positive half wave detection signal; When the voltage at main switching circuit two ends is when negative, photoelectrical coupler U1 conducting, signal ZERO is signal Vss, i.e. earth signal, namely negative half-wave detection signal.
Described central controller is controlled main switching circuit and auxiliary switching circuit execution corresponding actions by judging square-wave signal ZERO.Be positive half wave detection signal when central controller judges signal ZERO, central controller is exported the first control signal in auxiliary switching circuit, when central controller judges that signal ZERO is for negative half-wave detection signal, central controller is exported the second control signal in main switching circuit.Central controller is Master Control Center, central controller also needs to gather current/voltage by current/voltage collecting unit, carries out Arithmetic for Reactive Power Compensation etc., the auxiliary switching of controlling synchro switch, the above-mentioned control of central controller and algorithm belong to the conventional control procedure in this area, do not repeat them here.
With reference to Fig. 3, described auxiliary switching circuit is for receiving the first control signal of central controller output and automatically detecting voltage over zero.Auxiliary switching circuit comprise for automatically detect voltage over zero and when the voltage over zero the auxiliary switching circuit of conducting voltage zero-crossing detector and for receiving the first control signal and being communicated with the switch element of voltage zero-crossing detector, voltage zero-crossing detector is connected with switch element, and switch element is connected with central controller.Voltage zero-crossing detector is the automatic detector part of characteristic electron, voltage zero-crossing detector is powerful diode D4, switch element is power relay K2, voltage zero-crossing detector is connected with single phase poaer supply, switch element is connected with power capacitor, diode D4 by power capacitor to the conducting of single phase poaer supply direction.When auxiliary switching circuit receives the first control signal of central controller output, power ratio control relay K 2 is controlled power relay K2 closure in the lasting random time of whole positive half wave signal, now diode D4 is in reverse blocking state, the upper no current of power relay K2 passes through, i.e. auxiliary switching circuit breaker, in the time that diode D4 detects voltage reversal, diode D4 is in forward conduction state, on power relay K2, start to have electric current to pass through, auxiliary switching circuit communication, power capacitor drops into.
With reference to Fig. 3, described main switching circuit is for receiving the second control signal of central controller output and dropping into power capacitor, main switching circuit is magnetic freeze mode relay K 1, and magnetic freeze mode relay K 1 is connected with central controller, and by the second control signal control, whether it drops into.When after magnetic freeze mode relay K 1 closure, by central controller controls power relay, K2 disconnects.
With reference to Fig. 1, Fig. 2 and Fig. 4, described in the testing circuit that shoves shove and output feedback signal IR for detection of power capacitor inside, feedback signal IR is input in central controller, for judging the reliability of power capacitor switching.The testing circuit that shoves connects on the input of power capacitor, and the electric current on the input of note power capacitor is I.The testing circuit that shoves comprises for regulating the charging interval and controlling the first unidirectional charging circuit of output voltage, be used for the second unidirectional charging circuit that regulates the charging interval and control output voltage, comparator U2 and output control unit, the input of the first unidirectional charging circuit and the second unidirectional charging circuit is connected with the junction of main switching circuit and power capacitor, the output of the first unidirectional charging circuit and the second unidirectional charging circuit is connected with two inputs of comparator U2 respectively, the output of comparator U2 is connected with output control unit, output control unit is connected with central controller.By regulating, can make the charging interval difference of the first unidirectional charging circuit and the second unidirectional charging circuit, while generation when shoving, the first unidirectional charging circuit and the second unidirectional charging circuit will be exported different voltage, judge.
With reference to Fig. 4, the first unidirectional charging circuit comprises diode D1, the 4th resistance R 4, the 5th resistance R 5 and the first capacitor C 1, diode D1, the 4th resistance R 4 and the 5th resistance R 5 are connected in turn, the other end ground connection of the 5th resistance R 5, the input of diode D1 is the input of the first unidirectional charging circuit, diode D1 by the input of the first unidirectional charging circuit to the 4th resistance R 4 direction conductings, the first capacitor C 1 is connected in parallel on the two ends of the 5th resistance R 5, and the junction of the 4th resistance R 4 and the first capacitor C 1 is the output of the first unidirectional charging circuit.The second unidirectional charging circuit comprises diode D2, the 6th resistance R 6, the 7th resistance R 7 and the second capacitor C 2, diode D2, the 6th resistance R 6 and the 7th resistance R 7 are connected in turn, the other end ground connection of the 7th resistance R 7, the input of diode D2 is the input of the second unidirectional charging circuit, diode D2 by the input of the second unidirectional charging circuit to the 6th resistance R 6 direction conductings, the second capacitor C 2 is connected in parallel on the two ends of the 7th resistance R 7, and the junction of the 6th resistance R 6 and the second capacitor C 2 is the output of the second unidirectional charging circuit; Described output control unit comprises the diode D3, the 8th resistance R 8 and the 9th resistance R 9 that connect in turn, the other end ground connection of the 9th resistance R 9, diode D3 is connected on the output of comparator U2, diode D3 is by comparator to the 8th resistance R 8 direction conductings, and the 8th resistance R 8 is connected with central controller with the junction of the 9th resistance R 9.
Adjust the 4th resistance R 4 and the 6th resistance R 6 can make the charging interval of the first unidirectional charging circuit be less than the charging interval of the second unidirectional charging circuit.While generation when shoving, the inconsistent electrical potential difference that causes two inputs of comparator U2 of two-way charging interval, feedback signal IR can export high level, judges the sudden change situation of power capacitor internal current by feedback signal IR.Occur that when the zero passage of synchro switch drops into function, in abnormal situation, the sampled signal of power capacitor internal current can produce the impact of shoving, just can follow the tracks of by current feedback signal IR the reliability of synchro switch.
Synchro switch of the present utility model adopts double-mechanical switch control mode, do not need accurately to control the operate time of magnetic latching relay K1, as long as ensure the positive half wave closed power relay K 2 in magnetic latching relay K1 both end voltage, that is to say closed power relay K 2 in 10mS, and the time of general power relay closure is in 5ms, so just reduce control difficulty, really accomplished power relay K2 no-flashy-flow closure.Closed magnetic latching relay K1 in the negative hemiwave time of magnetic latching relay K1 both end voltage, that is to say closed magnetic latching relay K1 in the situation that of power relay K2 closure and diode D4 forward conduction, light like this no-flashy-flow closure of accomplishing magnetic latching relay K1, disconnect again afterwards power relay K2, complete the process that whole no-flashy-flow drops into capacitor, also extend to hemiwave time control by point control the operate time of synchro switch, greatly reduces the control difficulty of synchro switch.
Referring to figs. 1 through Fig. 4, the control method of synchro switch, comprises the steps:
Step a: under the control of central controller, keep magnetic freeze mode relay K 1 and power relay K2 in off-state, now, power capacitor does not drop into.
Step b: phase detecting circuit detects the phase place of single phase poaer supply voltage in real time, if detect, the phase of single phase poaer supply voltage is <180 ° of 0 °≤φ and when the rising edge signal of single phase poaer supply voltage detected, the voltage at main switching circuit two ends is for just, photoelectrical coupler U1 cut-off, phase detecting circuit output positive half wave detection signal, and enter step c;
If detect, the phase place of single phase poaer supply voltage is that <360 ° of 180 °≤φ is while spending, the voltage at main switching circuit two ends is for negative, diode D4 detects and forward conduction automatically, photoelectrical coupler U1 conducting simultaneously, the negative half-wave detection signal of phase detecting circuit output, and enter steps d.
Step c: the positive half wave detection signal of central controller receiving phase testing circuit output, output the first control signal is to power relay K2, control power relay K2 closure in 5ms, now, due to the anti-phase cut-off of diode D4, auxiliary switching circuit, in off-state, returns to step b.
Steps d: the negative half-wave detection signal of central controller receiving phase testing circuit, detection power relay K 2, whether in closure state, if closed, enters step e simultaneously; Otherwise, return to step b.
Step e: central controller is exported the second control signal to magnetic freeze mode relay K 1, and controls magnetic freeze mode relay closes K1 in the lasting random time of whole negative half-wave voltage signal, enters step f after magnetic freeze mode relay K 1 closure.
Step f: central controller detects that after magnetic freeze mode relay K 1 closure, power ratio control relay K 2 disconnects.
Step g: above-mentioned steps, the testing circuit that shoves detects the input current I of power capacitor in real time, and output feedback signal IR is in central controller.
In above-mentioned steps, due to the restriction of phase detecting circuit particular circuit configurations, cause phase detecting circuit in the time of negative half-wave, to continue output high level signal, therefore in the time judging, need central controller to postpone as judgement according to rising edge signal backward, after 10ms after rising edge signal is the half-wave voltage signal duration, be judged as the beginning of negative half-wave voltage signal.
In above-mentioned explanation, all special instructions that do not add, all adopt technological means of the prior art.
Claims (7)
1. a synchro switch, it is characterized in that, described synchro switch comprises for detection of single phase poaer supply voltage-phase and exports positive half wave detection signal and the phase detecting circuit of negative half-wave detection signal, be used for the central controller that receives positive half wave detection signal and negative half-wave detection signal and export corresponding the first control signal and the second control signal, for receiving the first control signal and automatically detecting the auxiliary switching circuit of voltage over zero and for receiving the second control signal and dropping into the main switching circuit of power capacitor, main switching circuit, auxiliary switching circuit and phase detecting circuit are connected on respectively between single phase poaer supply and power capacitor, phase detecting circuit, main switching circuit is all connected with central controller with auxiliary switching circuit, described auxiliary switching circuit comprise for automatically detect voltage over zero and when the voltage over zero the auxiliary switching circuit of conducting voltage zero-crossing detector and for receiving the first control signal and being communicated with the switch element of voltage zero-crossing detector, voltage zero-crossing detector is connected with switch element, and switch element is connected with central controller.
2. synchro switch according to claim 1, it is characterized in that, described voltage zero-crossing detector is diode, switch element is power relay, voltage zero-crossing detector is connected with single phase poaer supply, switch element is connected with power capacitor, diode by power capacitor to the conducting of single phase poaer supply direction.
3. synchro switch according to claim 2, is characterized in that, described main switching circuit is magnetic freeze mode relay, and magnetic freeze mode relay is connected with central controller.
4. synchro switch according to claim 1, it is characterized in that, described voltage-phase testing circuit comprises photoelectrical coupler U1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and diode D5, the first resistance R 1, after diode D5 and the second resistance R 2 are in sequential series, be connected in parallel on the two ends of auxiliary switching circuit, diode D5 by single phase poaer supply to the conducting of power capacitor direction, in photoelectrical coupler U1, two inputs of light-emitting diode are connected in parallel on diode D5, light-emitting diode by power capacitor to the conducting of single phase poaer supply direction, the grounded emitter of triode in photoelectrical coupler U1, the collector electrode of triode is connected with power supply by the 3rd resistance R 3, the collector electrode of triode is connected with central controller, the collector electrode of triode is used for exporting positive half wave detection signal and negative half-wave detection signal.
5. synchro switch according to claim 1, it is characterized in that, described synchro switch also comprises for detection of power capacitor inside and shoving and the testing circuit that shoves of output feedback signal, the input of testing circuit of shoving is connected to the junction of main switching circuit and power capacitor, and the output of the testing circuit that shoves is connected with central controller.
6. synchro switch according to claim 5, it is characterized in that, the described testing circuit that shoves comprises for regulating the charging interval and controlling the first unidirectional charging circuit of output voltage, be used for the second unidirectional charging circuit that regulates the charging interval and control output voltage, comparator and output control unit, the input of the first unidirectional charging circuit and the second unidirectional charging circuit is connected with the junction of main switching circuit and power capacitor, the output of the first unidirectional charging circuit and the second unidirectional charging circuit is connected with two inputs of comparator respectively, the output of comparator is connected with output control unit, output control unit is connected with central controller.
7. synchro switch according to claim 6, it is characterized in that, described the first unidirectional charging circuit comprises diode D1, the 4th resistance R 4, the 5th resistance R 5 and the first capacitor C 1, diode D1, the 4th resistance R 4 is connected in turn with the 5th resistance R 5, the other end ground connection of the 5th resistance R 5, the input of diode D1 is the input of the first unidirectional charging circuit, diode D1 by the input of the first unidirectional charging circuit to the 4th resistance R 4 direction conductings, the first capacitor C 1 is connected in parallel on the two ends of the 5th resistance R 5, the junction of the 4th resistance R 4 and the first capacitor C 1 is the output of the first unidirectional charging circuit, described the second unidirectional charging circuit comprises diode D2, the 6th resistance R 6, the 7th resistance R 7 and the second capacitor C 2, diode D2, the 6th resistance R 6 and the 7th resistance R 7 are connected in turn, the other end ground connection of the 7th resistance R 7, the input of diode D2 is the input of the second unidirectional charging circuit, diode D2 by the input of the second unidirectional charging circuit to the 6th resistance R 6 direction conductings, the second capacitor C 2 is connected in parallel on the two ends of the 7th resistance R 7, and the junction of the 6th resistance R 6 and the second capacitor C 2 is the output of the second unidirectional charging circuit, described output control unit comprises the diode D3, the 8th resistance R 8 and the 9th resistance R 9 that connect in turn, the other end ground connection of the 9th resistance R 9, diode D3 is connected on the output of comparator, diode D3 is by comparator to the 8th resistance R 8 direction conductings, and the 8th resistance R 8 is connected with central controller with the junction of the 9th resistance R 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178611.0U CN203760387U (en) | 2014-04-14 | 2014-04-14 | Synchronous switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178611.0U CN203760387U (en) | 2014-04-14 | 2014-04-14 | Synchronous switch |
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| Publication Number | Publication Date |
|---|---|
| CN203760387U true CN203760387U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420178611.0U Expired - Fee Related CN203760387U (en) | 2014-04-14 | 2014-04-14 | Synchronous switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903912A (en) * | 2014-04-14 | 2014-07-02 | 杭州得诚电力科技有限公司 | Synchronous switch and control method thereof |
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2014
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903912A (en) * | 2014-04-14 | 2014-07-02 | 杭州得诚电力科技有限公司 | Synchronous switch and control method thereof |
| CN103903912B (en) * | 2014-04-14 | 2016-09-28 | 杭州得诚电力科技股份有限公司 | Synchro switch and control method thereof |
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| 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: 20140806 Termination date: 20170414 |