CN1503287A - Spark free on/off control circuit for contact of relay - Google Patents
Spark free on/off control circuit for contact of relay Download PDFInfo
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- CN1503287A CN1503287A CNA021490457A CN02149045A CN1503287A CN 1503287 A CN1503287 A CN 1503287A CN A021490457 A CNA021490457 A CN A021490457A CN 02149045 A CN02149045 A CN 02149045A CN 1503287 A CN1503287 A CN 1503287A
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Abstract
A sparkless on-off control circuit for a relay contact includes a supply voltage phase detection circuit for testing zero cross point of voltage, a first memory storing closing parameter time of the relay contact, a second memory storing its open parameter time, a load-side voltage phase detection circuit for testing the voltage zero cross point at its both ends, among which, a control unit controls the relay's on-off according to the parameter time to control the excitation chance and operation of its contact. The said circuit also includes a current phase detection circuit for testing current phase signals of the power supplying the load, so as to know the phase difference between the output voltage and current.
Description
Technical field
The invention relates to a kind of control circuit of relay, be meant that especially a kind of no-spark with the relay tip that detects voltage or current zero crossover point and have calibration function opens and closes control circuit.
Background of invention
At present, relay is that widespread usage is in electrical home appliances and various electrical apparatus control equipment, the main member of this relay includes coil, mechanical contacts and relay housing, via the control of this relay, can be used for driving purposes such as big electric power, isolated signal.
Though in most electric equipment now, can use the thyristor (for example SCR, TRIAC) of contactless formula to replace the function of this relay.But in some occasion, still using traditional relay, and since this relay have cost low, control easy advantage, so the use of relay is still very general.
Yet, the mechanical contacts of this relay closed circuit, when opening.If no suitable phase control, then between two contacts, have the generation of moment contact sparking, the generation of this spark not only can produce the interference of signal, also can shorten relay useful life.
Because the operating principle of relay is to control opening/closing of contact by the whether excitatory of coil, so after long-time the use, relay magnetic force might have the situation of degenerating or changing.If can suitably detect the situation that this magnetic force degenerates and proofreaied and correct, then the on-off action of this relay will be more accurate.
Summary of the invention
Therefore, this creator designs the no-spark keying control circuit of a relay tip at aforementioned need.
Another object of the present invention provides a kind of contact open circuit, control relay circuit of closed parameter time that detects this relay magnetic force change and proofread and correct this relay according to the data parameters that is detected.
Another object of the present invention provides a kind of no-spark of the relay tip of different loads characteristic that is applicable to and opens and closes control circuit.
The object of the present invention is achieved like this: a kind of no-spark of relay tip opens and closes control circuit, comprising:
One relay has two contacts, is connected in series between AC power and the load, and its contact state is controlled by the whether excitatory of relay coil;
One control unit;
One supply voltage detecting phase circuit in order to detecting the voltage zero crossover point of this AC power, and is delivered to control unit with this signal;
One control switch, in order to the instruction of assigning control relay action to this control unit:
One first memory body is connected in this control unit, and the closed parameter time of its internal storage one relay tip, this this relay coil of parameter time representation is subjected to excitatory back to finish closed time of delay up to its relay tip;
One second memory body is connected in this control unit, its one relay tip open-circuit parameter time of internal storage, behind this this relay coil loss of excitation of parameter time representation up to time of delay that its relay tip is finished open circuit;
When this control unit detects this control switch when assigning the signal of open circuit, control unit reads the closed parameter time of the relay tip of storing in first memory body earlier, then according to the closed parameter time of this relay tip, before the lower half or the voltage zero crossover point of next week of supply voltage, control unit is sent a relay excited signal earlier, and that relay coil is subjected to is excitatory, after time, the contact of this relay just carries out closure in this relay tip folding parameter of process;
When this control unit detects this control switch when assigning the signal of open circuit, control unit reads the relay tip open-circuit parameter time of storing in second memory body earlier, then according to this relay tip open-circuit parameter time, before the lower half or the voltage zero crossover point of next week of supply voltage, stop to export this relay excited signal, make the relay coil loss of excitation, after this relay tip open-circuit parameter time of process, this relay tip is just opened a way.
This supply voltage detecting phase circuit is to include a supply voltage to pick up and know that circuit and a mains voltage zero hand over checking circuit more.
More include a load side voltage detecting phase circuit, its cross-over connection is in the two ends of load, in order to detect the voltage zero crossover point of this load both end voltage, and this signal delivered to control unit, after the signal that the signal that control unit can be exported according to this load side voltage detecting phase circuit and this supply voltage detecting phase circuit are exported is compared, revise closed parameter time of this relay tip and relay tip open-circuit parameter time according to this.
This load side voltage detecting phase circuit is to include an output voltage checking circuit and the zero checking circuit more of handing over of an output voltage.
A kind of no-spark of relay tip opens and closes control circuit, comprising:
One relay has two contacts, is connected in series between AC power and the load, and its contact state is controlled by the whether excitatory of relay coil;
One control unit;
One supply voltage detecting phase circuit in order to detecting the voltage zero crossover point of this AC power, and is delivered to control unit with this signal;
One current phase circuit for detecting, be supplied to the current phase signal of load in order to detect AC power, and this signal delivered to control unit, so that the signal that this control unit can be exported according to this supply voltage detecting phase circuit and current phase circuit for detecting, and detect out phase difference between output voltage and electric current;
One control switch, in order to the instruction of assigning control relay action to this control unit;
One first memory body is connected in this control unit, and the closed parameter time of its internal storage one relay tip, this this relay coil of parameter time representation is subjected to excitatory back to finish closed time of delay up to its relay tip;
One second memory body is connected in this control unit, its one relay tip open-circuit parameter time of internal storage, behind this this relay coil loss of excitation of parameter time representation up to time of delay that its relay tip is finished open circuit;
When this control unit detects this control switch when assigning closed circuit signal, control unit reads the closed parameter time of the relay tip of storing in first memory body earlier, then according to the closed parameter time of this relay tip, before the lower half or the voltage zero crossover point of next week of supply voltage, control unit is sent a relay excited signal earlier, and that relay coil is subjected to is excitatory, after time, the contact of this relay just carries out closure in the closed parameter of this relay tip of process;
When this control unit detects this control switch when assigning the signal of open circuit, control unit reads the relay tip open-circuit parameter time of storing in second memory body earlier, then according to the phase difference between this relay tip open-circuit parameter time and output voltage and electric current, before the lower half or the voltage zero crossover point of next week of supply voltage, stop to export this relay excited signal, make the relay coil loss of excitation, after this relay tip open-circuit parameter time of process, this relay tip is just opened a way.
This supply voltage detecting phase circuit is to include a supply voltage checking circuit and a mains voltage zero to hand over checking circuit more.
More include a load side voltage detecting phase circuit, its cross-over connection is in the two ends of load, in order to detect the voltage zero crossover point of this load both end voltage, and this signal delivered to control unit, after the signal that the signal that control unit can be exported according to this load side voltage detecting phase circuit and this supply voltage detecting phase circuit are exported is compared, revise closed parameter time of this relay tip and relay tip open-circuit parameter time according to this.
This load side voltage detecting phase circuit is to include an output voltage checking circuit and the zero checking circuit more of handing over of an output voltage.
Description of drawings
Fig. 1 is the control circuit figure of the embodiment of the invention 1;
Fig. 2 is the coherent signal oscillogram of displayed map 1 circuit relay electrical equipment contact when execution is closed circuit;
Fig. 3 is the coherent signal oscillogram of displayed map 1 circuit relay electrical equipment contact when carrying out open circuit;
Fig. 4 is in displayed map 1 circuit, if during the excitatory characteristic changing of relay, relay tip is in the coherent signal oscillogram of carrying out when closed circuit;
Fig. 5 is in displayed map 1 circuit, if during the excitatory characteristic changing of relay, and the coherent signal oscillogram of relay tip when carrying out open circuit:
Fig. 6 is the control circuit figure of the embodiment of the invention 2;
Fig. 7 is the coherent signal oscillograms of displayed map 6 circuit relay electrical equipment contacts when execution is closed circuit;
Fig. 8 is the coherent signal oscillograms of displayed map 6 circuit relay electrical equipment contacts when carrying out open circuit;
Fig. 9 is in displayed map 6 circuit, if during the excitatory characteristic changing of relay, relay tip is in the coherent signal oscillogram of carrying out when closed circuit;
Figure 10 is in displayed map 6 circuit, if during the excitatory characteristic changing of relay, and the coherent signal oscillogram of relay tip when carrying out open circuit.
The figure number explanation:
1 load, 2 relay coils
2a, 2b relay tip 3 supply voltage detecting phase circuit
31 supply voltage checking circuits, 32 mains voltage zero are handed over checking circuit more
4 control unit 5a, first memory body
5b second memory body 7 load side voltage detecting phase circuit
71 load side voltage checking circuits, 72 load side voltages zero are handed over checking circuit more
8 current phase circuit for detecting, 81 electric current detectors
82 current amplifiers, 83 current zeros are handed over checking circuit more
ACV AC power VO voltage zero crossover point
V1 supply voltage V2 output voltage
IO current zero crossover point
Embodiment
At first as shown in Figure 1, for circuit diagram of the present invention promptly is connected in series with a pair of relay tip 2a, 2b between an AC power ACV and load 1, and the opening of this relay tip 2a, the 2b/state of closing can be controlled by the excitatory or loss of excitation of a relay coil 2.
Be connected in parallel to a supply voltage detecting phase circuit 3 at the two ends of AC power ACV, it is got over checking circuit 32 by a supply voltage checking circuit 31 and mains voltage zero friendship and is formed.This supply voltage detecting phase circuit 3 can be sent a supply voltage zero-crossing signal S1 to control unit 4 by the output of this supply voltage detecting phase circuit 3 during at the voltage zero crossover point in the position each time at this AC power ACV.
Simultaneously as shown in Figure 2, when control unit 4 detects a control switch ON/OFF when assigning the signal of closed circuit (ON), control unit 4 can read the closed parameter time t-on of the relay tip of storing among the first memory body 5a earlier, then according to the closed parameter time t-on of this relay tip, before the lower half or the voltage zero crossover point VO of next week of supply voltage ACV, control unit 4 can be sent relay excited signal S2 earlier, and it is excitatory that this signal can make relay coil 2 be subjected to behind one drive circuit 6.After the scheduled time through the closed parameter time t-on of this relay tip, the proper position of this supply voltage ACV is at voltage zero crossover point VO or in a tolerance scope, this moment this relay tip 2a, 2b just formal closed (joining the signal S3 among Fig. 1), so that the voltage V1 of AC power ACV is supplied to the two ends of load 1, as output voltage V 2.So, can make this relay tip 2a, 2b when closed circuit each time, can both so can reduce the spark that this relay tip 2a, 2b are produced when closed circuit at supply voltage V1 in zero crossover point VO place.
In Fig. 3 presentation graphs 1 circuit, relay tip 2a, the 2b coherent signal oscillogram when carrying out open circuit.When control unit 4 detects control switch ON/OFF when assigning the signal of open circuit (OFF), control unit 4 can read the relay tip open-circuit parameter time t-off that stores among the second memory body 5b earlier, then according to this relay tip open-circuit parameter time t-off, before the voltage zero crossover point VO of half cycle or next week, control unit 4 promptly stops output relay excited signal S2 earlier under supply voltage ACV.After the scheduled time through this relay tip open-circuit parameter time t-off, this relay tip 2a, 2b be formal open circuit (ginseng signal S3 in Fig. 3), proper position of this time in zero crossover point VO place, so can be reduced the spark that this relay tip 2a, 2b are produced at supply voltage V1 when open circuit.
Desirable, circuit as shown in Figure 1, after the closed parameter time t-on of predetermined relay tip after control unit 4 is sent relay excited signal S2, control unit 4 promptly should receive the output voltage zero-crossing signal S4 that load side voltage detecting phase circuit 7 is sent.But, after with the passing of time relay magnetic force using, degenerate or during change, then promptly can change to some extent its operate time if having.So dispose a load side voltage detecting phase circuit 7 among the present invention, it is got over checking circuit 72 by a load side voltage checking circuit 71 and a load side voltage zero friendship and is formed.This load side voltage detecting phase circuit 7 is the two ends that are connected across load 1, can be used to detect AC power ACV delivers to load 1 two ends via relay tip 2a, 2b output voltage V 2 situations, and can in the output voltage V 2 at these load 1 two ends when the position is at the voltage zero crossover point each time, send an output voltage zero-crossing signal S4 to control unit 4 by the output of this load side voltage detecting phase circuit 7.
When relay tip is closed when the parameter time, t-on changed to some extent, by the signal of king's control unit 4 that load side voltage detecting phase circuit 7 is feedback can with former preset time difference (for example cycle of extra delay or several cycles) to some extent.This difference value can by control unit 4 according to supply voltage detecting phase circuit 3 and load side voltage detecting phase circuit 7 respectively output signal S1, S4 and calculated, and this corrected time value can be stored among the first memory body 5a, as the closed parameter time adjustment of relay tip value t '-on.
When this control unit 4 detects control switch ON/OFF when assigning the signal of unlatching (ON) next time, control unit 4 promptly can read the closed parameter time adjustment of the relay tip value t '-on that is stored among this first memory body 5a, then according to the closed parameter time adjustment of this relay tip value t '-on, before the lower half or the voltage zero crossover point VO of next week of supply voltage ACV, control unit 4 can be sent relay excited signal S2 earlier, and it is excitatory that this signal can make relay coil 2 be subjected to behind drive circuit 6.After the scheduled time through the closed parameter time adjustment of this relay tip value t '-on, this supply voltage ACV just the position at voltage zero crossover point VO or in a tolerance scope, this moment this relay tip 2a, 2b just formal closed (joining the signal S3 among Fig. 4).So, can make this relay tip 2a, 2b when closed circuit each time, can both when supply voltage V1 zero crossover point VO, move.
Similarly, when the relay tip open-circuit parameter time changes to some extent, by 7 back couplings of load side voltage detecting phase circuit to the signal of control unit 4 can with also difference (for example cycle of extra delay or several cycles) to some extent of former preset time.This difference value equally can by control unit 4 according to supply voltage detecting phase circuit 3 and load side voltage detecting phase circuit 7 respectively output signal S1, S4 and calculated, and this corrected time value can be stored among the second memory body 5b, as relay tip open-circuit parameter time adjustment value t '-off.
When control unit 4 detects control switch ON/OFF when assigning the signal of open circuit (OFF), control unit 4 can read the relay tip open-circuit parameter time adjustment value t '-off that stores among the first memory body 5b earlier, then according to this relay tip open-circuit parameter time adjustment value t '-off, before the lower half or the voltage zero crossover point VO of next week of supply voltage ACV, control unit 4 promptly stops output relay excited signal S2 earlier.After the scheduled time through this relay tip open-circuit parameter time adjustment value t '-off, this relay tip 2a, 2b be formal open circuit (the signal S3 among ginseng Fig. 5), this time just the position at supply voltage V1 in zero crossover point VO place.
This current phase circuit for detecting 8 can detect the phase place of the electric current that is supplied to load, and in current value position each time when zero crossover point IO, send a current zero crossing signal S5 to control unit 4 by its output.This control unit 4 can both be exported according to this supply voltage detecting phase circuit 3 and current phase circuit for detecting 8 signal, and detect out phase difference between voltage and electric current.
Fig. 7 is in displayed map 6 circuit, relay tip 2a, the 2b coherent signal oscillogram when carrying out closure.When control unit 4 detects a control switch ON/OFF when assigning the signal of unlatching (ON), control unit 4 can read the closed parameter time t1-on of the relay tip of storing among the first memory body 5a earlier, then according to the phase difference between the closed parameter time t1-on of this relay tip and output voltage and electric current, control unit 4 can be sent relay excited signal S2 earlier, and it is excitatory that this signal can make relay coil 2 be subjected to behind one drive circuit 6.After the scheduled time through the closed parameter time t1-on of this relay tip, just the position is at zero crossover point VO or in a tolerance scope for this supply voltage, and this moment, the S3 signal was sent, and this relay tip 2a, 2b are just formal closed.
Fig. 8 is in displayed map 6 circuit, relay tip 2a, the 2b coherent signal oscillogram when carrying out open circuit.When control unit 4 detects control switch ON/OFF when assigning the signal of open circuit (OFF), control unit 4 can read the relay tip open-circuit parameter time t1-Off that stores among the second memory body 5b earlier, then according to the phase difference between this relay tip open-circuit parameter time t-off and output voltage and electric current, the lower half of electric current or the current zero crossover point of next week still before, control unit 4 promptly stops output relay excited signal S2 earlier.After the scheduled time through this relay tip open-circuit parameter time t1-off, stop to send the S3 signal, this relay tip 2a, 2b just formally open a way.
Similar to last embodiment, when the closed parameter time of relay tip changes to some extent, by 7 back couplings of load side voltage detecting phase circuit to the signal of control unit 4 can with former preset time difference (for example cycle of extra delay or several cycles) to some extent.This difference value can by control unit 4 according to supply voltage detecting phase circuit 3 and load side voltage detecting phase circuit 7 respectively output signal S1, S4 and calculated, and this corrected time value can be stored among the first memory body 5a, as the closed parameter time adjustment of relay tip value t1 '-on (consulting shown in Figure 9).
When this control unit 4 detects control switch ON/OFF when assigning the signal of closed circuit (ON), control unit 4 promptly can be with the closed parameter time adjustment of the relay tip stored among this first memory body 5a value t1 '-on and according to the phase difference between output voltage and electric current, and the action of the excitatory opportunity of control relay and relay tip 2a, 2b.Control unit 4 is sent S2 earlier, passes through the scheduled time of t1 '-on again, and voltage just position is just sent the S3 signal at VO, makes relay tip 2a, 2b closure.
Similarly (join shown in Figure 10), when the relay tip open-circuit parameter time changes to some extent, by 7 back couplings of load side voltage detecting phase circuit to the signal of control unit 4 can with also difference (for example cycle of extra delay or several cycles) to some extent of former preset time.This difference value equally can by control unit 4 according to supply voltage detecting phase circuit 3 and load side voltage detecting phase circuit 7 respectively output signal S1, S4 and calculated, and this corrected time value can be stored among the second memory body 5b, as relay tip open-circuit parameter time adjustment value t1 '-off.
When this control unit 4 detects control switch ON/OFF when assigning the signal of open circuit (Off), control unit 4 promptly can be with relay tip open-circuit parameter time adjustment value t1 '-off of being stored among this second memory body 5b and according to the phase difference between output voltage and electric current, and the Off of the loss of excitation opportunity of control relay and relay tip 2a, 2b action.
Claims (8)
1, a kind of no-spark of relay tip opens and closes control circuit, comprising:
One relay has two contacts, is connected in series between AC power and the load, and its contact state is controlled by the whether excitatory of relay coil;
One control unit;
One supply voltage detecting phase circuit in order to detecting the voltage zero crossover point of this AC power, and is delivered to control unit with this signal;
One control switch, in order to the instruction of assigning control relay action to this control unit:
One first memory body is connected in this control unit, and the closed parameter time of its internal storage one relay tip, this this relay coil of parameter time representation is subjected to excitatory back to finish closed time of delay up to its relay tip;
One second memory body is connected in this control unit, its one relay tip open-circuit parameter time of internal storage, behind this this relay coil loss of excitation of parameter time representation up to time of delay that its relay tip is finished open circuit;
When this control unit detects this control switch when assigning the signal of open circuit, control unit reads the closed parameter time of the relay tip of storing in first memory body earlier, then according to the closed parameter time of this relay tip, before the lower half or the voltage zero crossover point of next week of supply voltage, control unit is sent a relay excited signal earlier, and that relay coil is subjected to is excitatory, after time, the contact of this relay just carries out closure in this relay tip folding parameter of process;
When this control unit detects this control switch when assigning the signal of open circuit, control unit reads the relay tip open-circuit parameter time of storing in second memory body earlier, then according to this relay tip open-circuit parameter time, before the lower half or the voltage zero crossover point of next week of supply voltage, stop to export this relay excited signal, make the relay coil loss of excitation, after this relay tip open-circuit parameter time of process, this relay tip is just opened a way.
2, the no-spark of relay tip opens and closes control circuit according to claim 1, it is characterized in that, this supply voltage detecting phase circuit is to include a supply voltage to pick up and know that a circuit and a mains voltage zero hand over checking circuit more.
3, the no-spark of relay tip opens and closes control circuit according to claim 1, it is characterized in that, more include a load side voltage detecting phase circuit, its cross-over connection is in the two ends of load, in order to detect the voltage zero crossover point of this load both end voltage, and this signal delivered to control unit, after the signal that the signal that control unit can be exported according to this load side voltage detecting phase circuit and this supply voltage detecting phase circuit are exported is compared, revise closed parameter time of this relay tip and relay tip open-circuit parameter time according to this.
4, the no-spark as relay tip as described in the claim 3 opens and closes control circuit, it is characterized in that, this load side voltage detecting phase circuit is to include an output voltage checking circuit and an output voltage zero is handed over checking circuit more.
5, a kind of no-spark of relay tip opens and closes control circuit, comprising:
One relay has two contacts, is connected in series between AC power and the load, and its contact state is controlled by the whether excitatory of relay coil;
One control unit;
One supply voltage detecting phase circuit in order to detecting the voltage zero crossover point of this AC power, and is delivered to control unit with this signal;
One current phase circuit for detecting, be supplied to the current phase signal of load in order to detect AC power, and this signal delivered to control unit, so that the signal that this control unit can be exported according to this supply voltage detecting phase circuit and current phase circuit for detecting, and detect out phase difference between output voltage and electric current;
One control switch, in order to the instruction of assigning control relay action to this control unit;
One first memory body is connected in this control unit, and the closed parameter time of its internal storage one relay tip, this this relay coil of parameter time representation is subjected to excitatory back to finish closed time of delay up to its relay tip;
One second memory body is connected in this control unit, its one relay tip open-circuit parameter time of internal storage, behind this this relay coil loss of excitation of parameter time representation up to time of delay that its relay tip is finished open circuit;
When this control unit detects this control switch when assigning closed circuit signal, control unit reads the closed parameter time of the relay tip of storing in first memory body earlier, then according to the closed parameter time of this relay tip, before the lower half or the voltage zero crossover point of next week of supply voltage, control unit is sent a relay excited signal earlier, and that relay coil is subjected to is excitatory, after time, the contact of this relay just carries out closure in the closed parameter of this relay tip of process;
When this control unit detects this control switch when assigning the signal of open circuit, control unit reads the relay tip open-circuit parameter time of storing in second memory body earlier, then according to the phase difference between this relay tip open-circuit parameter time and output voltage and electric current, before the lower half or the voltage zero crossover point of next week of supply voltage, stop to export this relay excited signal, make the relay coil loss of excitation, after this relay tip open-circuit parameter time of process, this relay tip is just opened a way.
6, the no-spark as relay tip as described in the claim 5 opens and closes control circuit, it is characterized in that, this supply voltage detecting phase circuit is to include a supply voltage checking circuit and a mains voltage zero is handed over checking circuit more.
7, the no-spark as relay tip as described in the claim 5 opens and closes control circuit, it is characterized in that, more include a load side voltage detecting phase circuit, its cross-over connection is in the two ends of load, in order to detect the voltage zero crossover point of this load both end voltage, and this signal delivered to control unit, after the signal that the signal that control unit can be exported according to this load side voltage detecting phase circuit and this supply voltage detecting phase circuit are exported is compared, revise closed parameter time of this relay tip and relay tip open-circuit parameter time according to this.
8, the no-spark as relay tip as described in the claim 7 opens and closes control circuit, it is characterized in that, this load side voltage detecting phase circuit is to include an output voltage checking circuit and an output voltage zero is handed over checking circuit more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021490457A CN100337291C (en) | 2002-11-20 | 2002-11-20 | Spark free on/off control circuit for contact of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021490457A CN100337291C (en) | 2002-11-20 | 2002-11-20 | Spark free on/off control circuit for contact of relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1503287A true CN1503287A (en) | 2004-06-09 |
| CN100337291C CN100337291C (en) | 2007-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021490457A Expired - Fee Related CN100337291C (en) | 2002-11-20 | 2002-11-20 | Spark free on/off control circuit for contact of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100337291C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159193B (en) * | 2007-09-28 | 2010-09-08 | 珠海格力电器股份有限公司 | Control method and system for prolonging electric service life of single-phase relay and alternating current contactor |
| CN102270546A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Drive circuit of relay |
| CN102693873A (en) * | 2011-03-21 | 2012-09-26 | 东硕资讯股份有限公司 | Time parameter acquiring method for adjusting alternating current electrical potential switching sequence of relay |
| CN104110800A (en) * | 2013-06-26 | 2014-10-22 | 广东美的制冷设备有限公司 | Air conditioner, and on-off control method and on-off control system for resistive load |
| CN105242728A (en) * | 2015-10-28 | 2016-01-13 | 小米科技有限责任公司 | Method and device controlling power on/off of intelligent socket, and the intelligent socket |
| CN106558449A (en) * | 2015-09-24 | 2017-04-05 | 仁宝电脑工业股份有限公司 | Relay control device and its control method |
| CN108962677A (en) * | 2018-07-11 | 2018-12-07 | 深圳拓邦股份有限公司 | A kind of means of relay controlling, system and relay |
| CN110033987A (en) * | 2019-05-15 | 2019-07-19 | 广州视琨电子科技有限公司 | Power supply control method, system, equipment and storage medium |
| CN111081495A (en) * | 2019-12-12 | 2020-04-28 | 恒大智慧充电科技有限公司 | Charging apparatus, charging method, computer apparatus, and storage medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO168009C (en) * | 1988-09-19 | 1994-06-21 | Sverre Lillemo | Electrical switchgear. |
| DE4219834A1 (en) * | 1992-06-17 | 1993-12-23 | Fraunhofer Ges Forschung | Method and device for controlling an electromagnetic switch |
| CN1359122A (en) * | 2000-12-18 | 2002-07-17 | 刘英彰 | Circuit for eliminating spark in relay contact |
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2002
- 2002-11-20 CN CNB021490457A patent/CN100337291C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159193B (en) * | 2007-09-28 | 2010-09-08 | 珠海格力电器股份有限公司 | Control method and system for prolonging electric service life of single-phase relay and alternating current contactor |
| CN102270546A (en) * | 2010-06-07 | 2011-12-07 | 鸿富锦精密工业（深圳）有限公司 | Drive circuit of relay |
| CN102693873A (en) * | 2011-03-21 | 2012-09-26 | 东硕资讯股份有限公司 | Time parameter acquiring method for adjusting alternating current electrical potential switching sequence of relay |
| CN104110800A (en) * | 2013-06-26 | 2014-10-22 | 广东美的制冷设备有限公司 | Air conditioner, and on-off control method and on-off control system for resistive load |
| CN104110800B (en) * | 2013-06-26 | 2017-04-05 | 广东美的制冷设备有限公司 | The method of controlling switch of resistive load, system and air-conditioner |
| CN106558449A (en) * | 2015-09-24 | 2017-04-05 | 仁宝电脑工业股份有限公司 | Relay control device and its control method |
| CN105242728A (en) * | 2015-10-28 | 2016-01-13 | 小米科技有限责任公司 | Method and device controlling power on/off of intelligent socket, and the intelligent socket |
| CN108962677A (en) * | 2018-07-11 | 2018-12-07 | 深圳拓邦股份有限公司 | A kind of means of relay controlling, system and relay |
| CN110033987A (en) * | 2019-05-15 | 2019-07-19 | 广州视琨电子科技有限公司 | Power supply control method, system, equipment and storage medium |
| CN111081495A (en) * | 2019-12-12 | 2020-04-28 | 恒大智慧充电科技有限公司 | Charging apparatus, charging method, computer apparatus, and storage medium |
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