CN204928360U - A prevent shaking electric installation for series capacitance formula ac contactor - Google Patents
A prevent shaking electric installation for series capacitance formula ac contactor Download PDFInfo
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- CN204928360U CN204928360U CN201520292755.3U CN201520292755U CN204928360U CN 204928360 U CN204928360 U CN 204928360U CN 201520292755 U CN201520292755 U CN 201520292755U CN 204928360 U CN204928360 U CN 204928360U
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Abstract
The utility model discloses a prevent shaking electric installation for series capacitance formula ac contactor, including electrical energy conversion and storage unit and the analog quantity acquisition unit who connects gradually, central control unit, half -bridge copped wave voltage output the control unit and friendship DC power supply switching the control unit, hand over DC power supply to switch and be connected with storage unit 1 between the control unit and the central control unit, analog quantity acquisition unit and electrical energy conversion and storage unit insert the alternating current respectively, and electrical energy conversion and storage unit are connected with central control unit and half -bridge copped wave voltage output the control unit respectively, the utility model discloses central control unit can estimate the capacity of a contactor according to the operating current who gathers ac contactor to set for drive circuit's PWM duty cycle according to the capacity of contactor, when ac contactor took place to shake the electricity, some devices of preventing shaking came contactor charging and discharging through half -bridge copped wave voltage output the control unit, made the controllable DC voltage of output exert contactor coil, reliable actuation still when guaranteeing that the contactor shakes the electricity.
Description
Technical field
The utility model relates to electronic circuit field, particularly relates to a kind of Anti-electricity dazzling device for series capacitance type A.C. contactor.
Background technology
A.C. contactor is generally used in alternating current circuit, its current induced magnetic field utilizing coil to flow through, thus makes contact closure, to reach the object of control load electrical equipment.After energising, coil can produce powerful magnetic field, and make the static iron core in electromagnetic system produce electromagnetic attraction armature, and make switch or closed action with moving contact, during power-off, magnetic force disappears, and contact returns to former state again: normally closed, closes, normal Kai Zekai.Traditional A.C. contactor circuit is in the process used, the phenomenon of instantaneous loss of pressure can be there is in the instability due to electric power system, contactor is caused operationally to discharge suddenly, have impact on the safe and stable operation of load circuit, to continuous seepage type, enterprise brings huge economic loss and potential safety hazard.
In order to solve this technical problem, prior art accesses direct current when occurring to shake electricity to described A.C. contactor, as shown in Figure 1, this processing mode has following shortcoming: when (1) direct voltage directly outputs to serial capacitance compensation energy-saving alternating current contactor, serial capacitance Cs due to this contactor inside has the effect that stopping direct current leads to interchange, charging process is only had when causing direct voltage to apply, discharge off process, when Cs is full of, direct current is blocked on outside contactor coil KM, therefore contactor can only adhesive very short a period of time, cannot adhesive for a long time, and then the setting requirement of user to the retention time cannot be met.(2) direct voltage exported is unadjustable, and the contactor of different manufacturers is had nothing in common with each other establishing timing parameter, and fix a voltage when exporting, voltage is higher easily causes coil burnout, and low voltage easily causes contactor to keep adhesive.(3) when direct voltage outside can timing, need to test different contactor, whether can reliably adhesive with verifying voltage, cause field adjustable workload large, efficiency is low.
Therefore, be necessary to provide a kind of new Anti-electricity dazzling device to solve the problems referred to above.
Utility model content
The purpose of this utility model is to provide one can automatically regulate direct voltage size, makes described A.C. contactor have the Anti-electricity dazzling device for series capacitance type A.C. contactor of charging and discharging function.
To achieve these goals, the technical scheme that adopts of the utility model is as follows:
A kind of Anti-electricity dazzling device for series capacitance type A.C. contactor, described Anti-electricity dazzling device comprises analog acquisition unit, power of alterating and direct current switch control unit, electric energy conversion and storage element, half-bridge chopping voltage output control unit, central control unit and driver element, described analog acquisition unit and described electric energy are changed and storage element incoming transport electricity respectively, described analog acquisition unit and described central control unit are electrically connected, described electric energy conversion and storage element are electrically connected to provide electric energy with described central control unit and described half-bridge chopping voltage output control unit respectively, described power of alterating and direct current switch control unit is connected between described analog acquisition unit and A.C. contactor circuit, described driver element is connected between described central control unit and described power of alterating and direct current switch control unit, described half-bridge chopping voltage output control unit and described power of alterating and direct current switch control unit are electrically connected.
Preferably, described alternating current comprises live wire and zero line, described analog acquisition unit comprises power pack, voltage changer and the first resistance, described current transformers in series is on described live wire, and described voltage changer and described first resistant series are connected between described live wire and described zero line.
Preferably, described electric energy conversion and storage element comprise C/DC power module, a DC/DC power module, the 2nd DC/DC power module and energy-storage module, described C/DC power module is electrically connected with a described DC/DC power module, described 2nd DC/DC power module and described energy-storage module respectively, and described energy-storage module is electrically connected with a described DC/DC power module and described 2nd DC/DC power module respectively.
Preferably, described energy-storage module comprises rechargeable battery or super capacitor.
Preferably, described Anti-electricity dazzling device comprises the first relay and the second relay, and described first relay comprises the first coil and the first dynamic circuit breaker switch, and described second relay comprises the second coil, the first dynamic circuit connector switch and the second dynamic circuit connector switch.
Preferably, described power of alterating and direct current switch control unit comprises described first dynamic circuit breaker switch, described first dynamic circuit connector switch, described second dynamic circuit connector switch, first electronic switch, second electronic switch and the 3rd electronic switch, described first to the 3rd electronic switch includes the first terminals, second terminals and control end, described first dynamic circuit breaker switch series is associated on described live wire, described first electronic switch is connected with described first dynamic circuit breaker switch in parallel, the first end of described first dynamic circuit breaker switch is connected with described analog acquisition unit, described second electronic switch and described first dynamic circuit connector switch are connected in series between the second end of described first dynamic circuit breaker switch and the first terminals of described half-bridge chopping voltage output control unit, described 3rd electronic switch and described second dynamic circuit connector switch are connected in series between the second terminals of described zero line and described half-bridge chopping voltage output control unit.
Preferably, described half-bridge chopping voltage output control unit comprises the 4th electronic switch, 5th electronic switch and pulse width modulation (PWM) drive circuit, described 4th electronic switch and described 5th electronic switch include the first terminals, second terminals and control end, first terminals of described 4th electronic switch are connected with a described DC/DC power module, second terminals of described 4th electronic switch are connected with the first terminals of described 5th electronic switch, the signal input part of described pulse width modulation (PWM) drive circuit is connected with described central control unit, the signal output part of described pulse width modulation (PWM) drive circuit respectively with described 4th electronic switch, the control end of described 5th electronic switch connects, wherein, second terminals of described 4th electronic switch form the first terminals of described half-bridge chopping voltage output control unit, second terminals of described 5th electronic switch form the second terminals of described half-bridge chopping voltage output control unit.
Preferably, described drive circuit comprises relay drive circuit, described first coil, described second coil and electronic switch drive circuit, the signal input part of described electronic switch drive circuit is connected with described central control unit, the signal output part of described electronic switch drive circuit respectively with described first electronic switch, second electronic switch is connected with the control end of described 3rd electronic switch, the signal input part of described relay drive circuit is connected with described central control unit, the signal output part of described relay drive circuit respectively with the first end of described first coil, the first end of described second coil connects, second end of described first coil and the second end ground connection of described second coil.
Compared with prior art, the beneficial effect that the utility model is used for the Anti-electricity dazzling device of series capacitance type A.C. contactor is: alternating current can be converted to direct current and store by described electric energy conversion and storage element, described central control unit can estimate the capacity of contactor according to the running current gathering A.C. contactor, and the capacity of foundation contactor sets the PWM duty ratio of drive circuit, when A.C. contactor occurs to shake electricity, anti-shake point apparatus comes contactor charge and discharge by half-bridge chopping voltage output control unit, the controlled direct voltage of output is made to be applied to contactor coil, still reliable adhesive when ensureing that contactor shakes electric.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of Anti-electricity dazzling device in prior art;
The circuit structure block diagram of Fig. 2 Anti-electricity dazzling device described in the utility model and A.C. contactor;
Fig. 3 is the circuit theory diagrams of Anti-electricity dazzling device described in the utility model;
Fig. 4 is the flow chart of the control method of Anti-electricity dazzling device described in the utility model;
Fig. 5 is the control flow chart of preparatory stage described in the utility model;
Fig. 6 is the control flow chart in supervision stage described in the utility model;
Fig. 7 is the control flow chart of switch step described in the utility model.
In figure, each mark is as follows: 1, analog acquisition unit; 2, power of alterating and direct current switch control unit; 3, electric energy conversion and storage element; 301, energy-storage module; 4, half-bridge chopping voltage output control unit; 5, driver element; 6, A.C. contactor circuit; L, live wire; N, zero line; TA, power pack; TV, voltage changer; R1, the first resistance; R2, the second resistance; L1, the first coil; L1_1, the first dynamic circuit breaker switch; L2, the second coil; L2_1, the first dynamic circuit connector switch; L2_2, the second dynamic circuit connector switch; S1, the first electronic switch; S2, the second electronic switch; S3, the 3rd electronic switch; S4, the 4th electronic switch; S5, the 5th electronic switch; Csuper, super capacitor; D1, the first diode; D2, the second diode.
Embodiment
Below in conjunction with specific embodiment, the utility model is described further.
Refer to shown in Fig. 1 to Fig. 7, the Anti-electricity dazzling device that the utility model is used for series capacitance type A.C. contactor comprises analog acquisition unit 1, power of alterating and direct current switch control unit 2, electric energy conversion and storage element 3, half-bridge chopping voltage output control unit 4, central control unit and driver element 5, described analog acquisition unit 1 and described electric energy are changed and storage element 3 incoming transport electricity respectively, described analog acquisition unit 1 is electrically connected with described central control unit, described electric energy conversion and storage element 3 are electrically connected to provide electric energy with described central control unit and described half-bridge chopping voltage output control unit 4 respectively, described power of alterating and direct current switch control unit 2 is connected between described analog acquisition unit 1 and A.C. contactor circuit 6, described driver element 5 is connected between described central control unit and described power of alterating and direct current switch control unit 2, described half-bridge chopping voltage output control unit 4 is electrically connected with described power of alterating and direct current switch control unit 2.
Wherein, described central control unit comprises microprocessor and peripheral circuit thereof, described alternating current comprises live wire L and zero line N, described analog acquisition unit 1 comprises power pack TA, voltage changer TV and the first resistance R1, described power pack TA is connected on described live wire L, and described voltage changer TV and described first resistance R1 is connected in series between described live wire L and described zero line N.
Described electric energy conversion and storage element 3 comprise AC/DC power module, a DC/DC power module, the 2nd DC/DC power module and energy-storage module 301, described AC/DC power module is electrically connected with a described DC/DC power module, described 2nd DC/DC power module and described energy-storage module 301 respectively, and described energy-storage module 301 is electrically connected with a described DC/DC power module and described 2nd DC/DC power module respectively.Described energy-storage module 301 comprises rechargeable battery or super capacitor Csuper.In the present embodiment, described AC/DC power module converts alternating current to 14V direct current, 14V direct current converts 96V direct current to through a described DC/DC power module and powers to described half-bridge chopping voltage output control unit 4, and 14V direct current converts 5V direct current to through described 2nd DC/DC power module and powers to described central control unit.
In the present embodiment, described energy-storage module 301 is connected with the first diode D1 with described AC/DC power module, the anode of described first diode D1 is connected with the DC voltage output end of described AC/DC power module, the negative electrode of the first diode D1 is connected with the power input of a DC/DC power module, described energy-storage module 301 is by super capacitor Csuper, second diode D2 and the second resistance R2 forms, described second diode D2 and the second resistance R2 is connected in parallel, the first end of described super capacitor Csuper is connected with the anode of the second diode D2, the second end ground connection of described super capacitor Csuper, the negative electrode of the second diode D2 is connected with the negative electrode of described first diode D1.
Described Anti-electricity dazzling device comprises the first relay and the second relay, and described first relay comprises the first coil L1 and the first dynamic circuit breaker switch L1_1, and described second relay comprises the second coil L2, the first dynamic circuit connector switch L2_1 and the second dynamic circuit connector switch L2_2.
In the utility model, described power of alterating and direct current switch control unit 2 comprises described first dynamic circuit breaker switch L1_1, described first dynamic circuit connector switch L2_1, described second dynamic circuit connector switch L2_2, first electronic switch S1, second electronic switch S2 and the 3rd electronic switch S3, described first to the 3rd electronic switch S3 includes the first terminals, second terminals and control end, described first dynamic circuit breaker switch L1_1 is connected on described live wire L, described first electronic switch S1 and described first dynamic circuit breaker switch L1_1 is connected in parallel, the first end of described first dynamic circuit breaker switch L1_1 is connected with described analog acquisition unit 1, between the second end that described second electronic switch S2 and described first dynamic circuit connector switch L2_1 is connected in series in described first dynamic circuit breaker switch L1_1 and the first terminals of described half-bridge chopping voltage output control unit 4, described 3rd electronic switch S3 and described second dynamic circuit connector switch L2_2 is connected in series between the second terminals of described zero line N and described half-bridge chopping voltage output control unit 4.
Described half-bridge chopping voltage output control unit 4 comprises the 4th electronic switch S4, 5th electronic switch S5 and pulse width modulation drive circuit, described 4th electronic switch S4 and described 5th electronic switch S5 includes the first terminals, second terminals and control end, first terminals of described 4th electronic switch S4 are connected with a described DC/DC power module, second terminals of described 4th electronic switch S4 are connected with first terminals of described 5th electronic switch S5, the signal input part of described pulse width modulation drive circuit is connected with described central control unit, the signal output part of described pulse width modulation drive circuit respectively with described 4th electronic switch S4, the control end of described 5th electronic switch S5 connects, wherein, second terminals of described 4th electronic switch S4 form the first terminals of described half-bridge chopping voltage output control unit 4, second terminals of described 5th electronic switch S5 form the second terminals of described half-bridge chopping voltage output control unit 4.
Described drive circuit comprises relay drive circuit, described first coil L1, described second coil L2 and electronic switch drive circuit, the signal input part of described electronic switch drive circuit is connected with described central control unit, the signal output part of described electronic switch drive circuit respectively with described first electronic switch S1, second electronic switch S2 is connected with the control end of described 3rd electronic switch S3, the signal input part of described relay drive circuit is connected with described central control unit, the signal output part of described relay drive circuit respectively with the first end of described first coil L1, the first end of described second coil L2 connects, second end of described first coil L1 and the second end ground connection of described second coil L2.
As shown in Figure 3, when A.C. contactor circuit 6 is energized, described coil KM is energized, and the dynamic circuit breaker switch that coil KM is corresponding disconnects, and in electric capacity Cs place in circuit, the dynamic circuit connector switch that coil KM is corresponding closes, and load circuit is connected.When alternating current occurs to shake point, described energy-storage module 301 powers to a described DC/DC power module and the 2nd DC/DC power module, a described DC/DC power module powers to described A.C. contactor circuit 6, and described 2nd DC/DC power module powers to described central control unit.
The control method of Anti-electricity dazzling device described in the utility model comprises the following steps:
A) system initialization is carried out;
B) preparatory stage: detect and calculate the alternating voltage of described alternating current and the alternating current of ac circuit, whether chargedly detect energy-storage module 301, calculate according to described alternating voltage and alternating current the voltage output duty cycle drawing described half-bridge chopping voltage output control unit 4, control described driver element 5 and work;
C) stage is monitored: detect described alternating current and whether shake electricity, namely whether described alternating voltage falls suddenly and whether described alternating current increases suddenly, if shake electricity, control described drive circuit, described half-bridge chopping voltage output control unit 4 works, start described power of alterating and direct current switch control unit 2, cut direct current to described A.C. contactor circuit 6;
D) switch step: detect abnormal alternating voltage and alternating current whether normal in the interior recovery of holding time of pre-set rolling electricity, if recover normal startup to restart time delay, alternating current is cut to described A.C. contactor circuit 6, normally start release delay if do not recover, make the power-off of described A.C. contactor circuit 6;
E) go to step b).
The control procedure of wherein said preparatory stage as shown in Figure 5, described analog acquisition unit 1 converts the voltage and current of control loop to small voltage signal by voltage changer TV and power pack TA, i.e. alternating voltage uac and alternating current iac, and alternating voltage uac and alternating current iac is delivered to described central control unit, digital signal is converted to by the analog to digital conversion circuit in central control unit, the size of electric current when the algorithm of microprocessor calculates power end voltage and contactor runs, when judging that power end voltage and contactor run, whether electric current is all greater than set point, if not, be then FALSE by preparation traffic sign placement, if, then judge to prepare whether mark is TRUE, if then the preparatory stage completes TRUE, if not TRUE then judges whether super capacitor Csuper is full of electricity, if underfill, be FALSE by preparation traffic sign placement, if be full of, judge whether direct voltage calculates complete and set duty ratio, if not, be then FALSE by preparation traffic sign placement, if, then drive S1 conducting, described first dynamic circuit breaker switch L1_1 is driven to disconnect, drive described first dynamic circuit connector switch L2_1 and the second dynamic circuit connector switch L2_2 conducting, PWM drive circuit sets duty ratio, be finally TRUE by preparation traffic sign placement, preparatory stage completes.Wherein, PWM drive circuit can make S4 and S5 according to the duty ratio alternate conduction set and shutoff, conducting when described S4 and S5 is different, when S4 conducting S5 turns off, electric capacity Cs in described A.C. contactor circuit 6 charges, voltage is applied to coil KM two ends, and when S4 turns off S5 conducting, the electric capacity Cs in described A.C. contactor circuit 6 is discharged by coil KM.
The control procedure in described supervision stage as shown in Figure 6, judge to prepare whether mark is TRUE, if then judge whether switching mark is FALSE, if not FALSE, detect uac whether fall suddenly more than 20% of rated voltage and slowly drop to less than 80% of rated voltage, if detect iac more whether increase suddenly more than 100% of rated current, if close S1, and start anti-shake time delay (0.16ms), if anti-shake delay time terminates, conducting S2 and S3, anti-shake is held time counter O reset, switching mark is set to TRUE, the supervision stage completes.
The control procedure of described switch step as shown in Figure 7, judge whether switching mark is TRUE, if judge whether anti-shake delay time terminates again, if terminate, judge whether uac recovers normal, if uac normally, turn off S2 and S3, make the first dynamic circuit connector switch L2_1 and the second dynamic circuit connector switch L2_2 disconnect and start and restart time delay (2ms), if restart delay time to terminate, A.C. contactor circuit 6 is incoming transport electricity again, conducting S1, first dynamic circuit breaker switch L1_1 is closed, switching mark is set to FALSE, and be FALSE by preparation traffic sign placement, switch step terminates; If uac is abnormal, turn off S2 and S3, the first dynamic circuit connector switch L2_1 and the second dynamic circuit connector switch L2_2 is made to disconnect and start release delay (20ms), if the release delay time terminates, A.C. contactor circuit 6 trips power-off, conducting S1, first dynamic circuit breaker switch L1_1 is closed, switching mark is set to FALSE, and be FALSE by preparation traffic sign placement, switch step terminates.
Schematically above be described the utility model and execution mode thereof, this description does not have restricted, and also just one of the execution mode of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the frame mode similar to this technical scheme and embodiment without creationary, protection range of the present utility model all should be belonged to.
Claims (8)
1. the Anti-electricity dazzling device for series capacitance type A.C. contactor, it is characterized in that, described Anti-electricity dazzling device comprises analog acquisition unit, power of alterating and direct current switch control unit, electric energy conversion and storage element, half-bridge chopping voltage output control unit, central control unit and driver element, described analog acquisition unit and described electric energy are changed and storage element incoming transport electricity respectively, described analog acquisition unit and described central control unit are electrically connected, described electric energy conversion and storage element are electrically connected to provide electric energy with described central control unit and described half-bridge chopping voltage output control unit respectively, described power of alterating and direct current switch control unit is connected between described analog acquisition unit and A.C. contactor circuit, described driver element is connected between described central control unit and described power of alterating and direct current switch control unit, described half-bridge chopping voltage output control unit and described power of alterating and direct current switch control unit are electrically connected.
2. Anti-electricity dazzling device as claimed in claim 1, it is characterized in that, described alternating current comprises live wire and zero line, described analog acquisition unit comprises power pack, voltage changer and the first resistance, described current transformers in series is on described live wire, and described voltage changer and described first resistant series are connected between described live wire and described zero line.
3. Anti-electricity dazzling device as claimed in claim 2, it is characterized in that, described electric energy conversion and storage element comprise AC/DC power module, a DC/DC power module, the 2nd DC/DC power module and energy-storage module, described AC/DC power module is electrically connected with a described DC/DC power module, described 2nd DC/DC power module and described energy-storage module respectively, and described energy-storage module is electrically connected with a described DC/DC power module and described 2nd DC/DC power module respectively.
4. Anti-electricity dazzling device as claimed in claim 3, it is characterized in that, described energy-storage module comprises rechargeable battery or super capacitor.
5. Anti-electricity dazzling device as claimed in claim 4, it is characterized in that, described Anti-electricity dazzling device comprises the first relay and the second relay, and described first relay comprises the first coil and the first dynamic circuit breaker switch, and described second relay comprises the second coil, the first dynamic circuit connector switch and the second dynamic circuit connector switch.
6. Anti-electricity dazzling device as claimed in claim 5, it is characterized in that, described power of alterating and direct current switch control unit comprises described first dynamic circuit breaker switch, described first dynamic circuit connector switch, described second dynamic circuit connector switch, first electronic switch, second electronic switch and the 3rd electronic switch, described first to the 3rd electronic switch includes the first terminals, second terminals and control end, described first dynamic circuit breaker switch series is associated on described live wire, described first electronic switch is connected with described first dynamic circuit breaker switch in parallel, the first end of described first dynamic circuit breaker switch is connected with described analog acquisition unit, described second electronic switch and described first dynamic circuit connector switch are connected in series between the second end of described first dynamic circuit breaker switch and the first terminals of described half-bridge chopping voltage output control unit, described 3rd electronic switch and described second dynamic circuit connector switch are connected in series between the second terminals of described zero line and described half-bridge chopping voltage output control unit.
7. Anti-electricity dazzling device as claimed in claim 6, it is characterized in that, described half-bridge chopping voltage output control unit comprises the 4th electronic switch, 5th electronic switch and pulse width modulation drive circuit, described 4th electronic switch and described 5th electronic switch include the first terminals, second terminals and control end, first terminals of described 4th electronic switch are connected with a described DC/DC power module, second terminals of described 4th electronic switch are connected with the first terminals of described 5th electronic switch, the signal input part of described pulse width modulation drive circuit is connected with described central control unit, the signal output part of described pulse width modulation drive circuit respectively with described 4th electronic switch, the control end of described 5th electronic switch connects, wherein, second terminals of described 4th electronic switch form the first terminals of described half-bridge chopping voltage output control unit, second terminals of described 5th electronic switch form the second terminals of described half-bridge chopping voltage output control unit.
8. Anti-electricity dazzling device as claimed in claim 7, it is characterized in that, described drive circuit comprises relay drive circuit, described first coil, described second coil and electronic switch drive circuit, the signal input part of described electronic switch drive circuit is connected with described central control unit, the signal output part of described electronic switch drive circuit respectively with described first electronic switch, second electronic switch is connected with the control end of described 3rd electronic switch, the signal input part of described relay drive circuit is connected with described central control unit, the signal output part of described relay drive circuit respectively with the first end of described first coil, the first end of described second coil connects, second end of described first coil and the second end ground connection of described second coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520292755.3U CN204928360U (en) | 2015-05-08 | 2015-05-08 | A prevent shaking electric installation for series capacitance formula ac contactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520292755.3U CN204928360U (en) | 2015-05-08 | 2015-05-08 | A prevent shaking electric installation for series capacitance formula ac contactor |
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| CN204928360U true CN204928360U (en) | 2015-12-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935077A (en) * | 2015-05-08 | 2015-09-23 | 江苏国网自控科技股份有限公司 | Anti-interference electricity device for series capacitance type AC contactor and control method thereof |
| CN111693854A (en) * | 2020-06-24 | 2020-09-22 | 贵州天义电器有限责任公司 | Circuit for simulating voltage drop and operation method thereof |
-
2015
- 2015-05-08 CN CN201520292755.3U patent/CN204928360U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935077A (en) * | 2015-05-08 | 2015-09-23 | 江苏国网自控科技股份有限公司 | Anti-interference electricity device for series capacitance type AC contactor and control method thereof |
| CN104935077B (en) * | 2015-05-08 | 2018-06-12 | 江苏国网自控科技股份有限公司 | For the Anti-electricity dazzling device and its control method of series capacitance type A.C. contactor |
| CN111693854A (en) * | 2020-06-24 | 2020-09-22 | 贵州天义电器有限责任公司 | Circuit for simulating voltage drop and operation method thereof |
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