CN100428390C - Electromagnet control device - Google Patents
Electromagnet control device Download PDFInfo
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- CN100428390C CN100428390C CNB2006100379598A CN200610037959A CN100428390C CN 100428390 C CN100428390 C CN 100428390C CN B2006100379598 A CNB2006100379598 A CN B2006100379598A CN 200610037959 A CN200610037959 A CN 200610037959A CN 100428390 C CN100428390 C CN 100428390C
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Abstract
The present invention discloses a new electromagnet control device with an oscillating circuit aiming at the problem of the existing electromagnet control device of poor interference rejection. The present invention comprises a rectification circuit (1), a voltage reduction filtering voltage stabilizing circuit (2), an electromagnet control circuit (3), an electromagnet (4), a starting circuit (5) and a divider circuit (7), wherein the input of the rectification circuit (1) is connected with a mains supply, and the output provides a working power supply for each circuit; the input of the starting circuit (5) is connected with the output of the voltage reduction filtering voltage stabilizing circuit (2); the electromagnet control circuit (3) controls the electromagnet (4) to attract and release; the output of the divider circuit (7) is connected with the output of the starting circuit (5). The present invention is characterized in that the oscillating circuit (6) is connected between the output of the starting circuit (5) and the input of the electromagnet control circuit (3). The present invention has the advantages of simple structure and strong interference rejection.
Description
Technical field
The present invention relates to a kind of control device of low-voltage circuit breaker, specifically relate to the electromagnet control device in a kind of circuit breaker.
Background technology
Typically, this electromagnet control device can be applied to the annex of circuit breaker, for example in shunt release and the making electromagnet, certainly, this electromagnet control device is not limited in and is applied in above-mentioned occasion, can be suitable for all occasions that needs control electromagnetic actuation and release.
At present, the control circuit of the electromagnet control device in the common circuit breaker as shown in Figure 1.Line voltage is output dc voltage U1 ' after diode D1 ', D2 ', D3 ', D4 ' rectification, U1 ' through resistance R 1 ', R2 ' dividing potential drop after diode D5 ', capacitor C 1 ', output voltage U 2 behind the voltage stabilizing didoe D6 ', resistance R 3 ' smothing filtering ', U2 ' is to capacitor C 2 ' charging, in the charging process field effect transistor VT1 ' grid form voltage U 3 ', make field effect transistor VT1 ' conducting, electromagnet L ' gets electric adhesive, after C2 ' is full of electricity, make U3 ' drop to 0V, field effect transistor VT1 ' ends, and circuit is in stable state.
Because this circuit input impedance is higher, other factors can not well prevent the interference of this circuit, such as electrostatic interference, the interference of electromagnetic field etc., these Recombinant Interferons make capacitor C 2 ' precharge, thereby when making the normal occlusion separating brake, because can not be, make the field effect transistor VT1 ' can not conducting, not adhesive of electromagnet again to capacitor C 2 ' charging.
93236467.5 of China Patent No. are called in the file of " economize on electricity contactor ", control circuit for electromagnet T
s, J and CRT send turn-on command when outage, reach the purpose that electromagnetic system is discharged, but can't prevent static, the interference of electromagnetic field, when disturbing when taking place, normally adhesive of electromagnet, it is unreliable that adhesive is moved.
Japanese patent application publication No. 2005-243869 name is called in the file of " electromagnet drive unit ", with control impuls output loop 8 and the maintenance 9 solenoid controlled loops 5 of controlling simultaneously in parallel, impulse hunting loop, 7, control impuls output loop 8 can only be adopted with the output that keeps impulse hunting loop 9 draw mode on the high level, can not adopt the low level pull-down pattern, not so can produce the conflict of high-low level, so this device can not be applied in the occasion of field effect transistor as the solenoid controlled loop, generally adopting under the situation of field effect transistor as switching device at present, the application of this kind device is subjected to restriction to a certain degree.And the purpose of this invention is to disturb for the voltage fluctuation of eliminating under the extremity.
90215388.9 of China Patent No. are called in the file of " energy-conservation dynamic electromagnetic driver is imitated in low temperature rise ", the pulse duration of the oscillating circuit output of electromagnet control device can only be set in advance, can not dynamically adjust, cross when low when supply voltage, may can not make electromagnet keep attracting state because coil current is too small; When supply voltage is too high, may make the temperature of solenoid too high owing to coil current is excessive, even burn out, reduced the reliable in action of solenoid.
Summary of the invention
The purpose of this invention is to provide that a kind of antijamming capability is strong, the electromagnet control device of reliable in action.
A kind of electromagnet control device, it comprises rectification circuit 1, step-down filter regulator circuit 2, control circuit for electromagnet 3, electromagnet 4, start-up circuit 5, bleeder circuit 7, the input of rectification circuit 1 connects mains supply, it is output as each circuit working power is provided, the input of start-up circuit 5 connects the output of step-down filter regulator circuit 2, control circuit for electromagnet 3 control electromagnet 4 carry out adhesive and release, the output of bleeder circuit 7 links to each other with the output of start-up circuit 5, it is characterized in that between the input of the output of start-up circuit 5 and control circuit for electromagnet 3 oscillating circuit 6 being arranged, described oscillating circuit 6 is by resistance R 3, diode D8, D9, capacitor C 3, C4, time-base integrated circuit IC1 forms, one end of resistance R 3, the anode of diode D9,7 pin of time-base integrated circuit IC1 and the resistance R 2 of bleeder circuit 7, the tie point of resistance R 4 is connected with the drain electrode of the field effect transistor VT2 of start-up circuit 5, the other end of resistance R 3 is connected with the negative electrode of diode D8, the negative electrode of the anode of diode D8 and diode D9,2 of one end of capacitor C 3 and time-base integrated circuit IC1,6 pin connect, 4 of time-base integrated circuit IC1,8 pin are connected with step-down filter regulator circuit 2,3 pin of time-base integrated circuit IC1 connect the grid of the field effect transistor VT1 in the control circuit for electromagnet 3,5 pin of time-base integrated circuit IC1 connect an end of capacitor C 4, capacitor C 3,1 pin of the other end of C4 and time-base integrated circuit IC1 connects the negative output terminal of rectification circuit 1.
Described rectification circuit 1 is made up of diode D1, D2, D3, D4; Step-down filter regulator circuit 2 is made up of resistance R 1, diode D5, capacitor C 1, voltage stabilizing didoe D6; Control circuit for electromagnet 3 is made up of field effect transistor VT1, start-up circuit 5 is made up of capacitor C 2, diode D7, resistance R 5 and field effect transistor VT2, the output that connects step-down filter regulator circuit 2 by capacitor C 2 is drawn in the input of start-up circuit 5 from the grid of field effect transistor VT2, the output of start-up circuit 5 connects the triggering input of oscillating circuit 6, the input that the output of oscillating circuit 6 connects control circuit for electromagnet 3 is the grid of field effect pipe VT1, and the output of control circuit for electromagnet 3 is drawn from the drain electrode of field effect transistor VT1 and connect electromagnet 4.
Described oscillating circuit 6 output pulse widths and line voltage size form inverse relation.
Beneficial effect of the present invention: owing to added oscillating circuit, the precharge of C2 electric capacity of in time releasing, and reduced input impedance, thus eliminated interference effect.And because the pulse duration of oscillating circuit output is controlled by bleeder circuit by mains supply, realized the dynamic control of solenoid, thereby the current constant that electromagnet is under any circumstance flow through can keep stable the suction-combining force, can control the temperature rise of solenoid simultaneously again, reliable in action.
Description of drawings
Fig. 1 is the electrical schematic diagram of shunt release common in the background technology of the present invention.
Fig. 2 is a theory diagram of the present invention.
Fig. 3 is a circuit diagram of the present invention.
Fig. 4 is the circuit diagram of oscillating circuit of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Shown in Fig. 2,3,4.
As shown in Figure 2, electromagnet control device of the present invention, it comprises rectification circuit 1, step-down filter regulator circuit 2, control circuit for electromagnet 3, electromagnet 4, start-up circuit 5, bleeder circuit 7, rectification circuit 1 offers electromagnet 4 with the direct voltage after rectification, bleeder circuit 7 and step-down filter regulator circuit 2, step-down filter regulator circuit 2 output power supplies are given start-up circuit 5, control circuit for electromagnet 3 control electromagnet 4 carry out adhesive and release work, the input of start-up circuit 5 connects the output of step-down filter regulator circuit 2, the output of bleeder circuit 7 links to each other with the output of start-up circuit 5, be connected to oscillating circuit 6 between the input of the output of start-up circuit 5 and control circuit for electromagnet 3, physical circuit as shown in Figure 3.
As Fig. 3, become direct voltage U1 after rectification circuit 1 rectification of mains supply via diode D1, D2, D3, D4 composition, output power supply U2 after step-down filter regulator circuit 2 step-downs that U1 forms via resistance R 1, diode D5, capacitor C 1, voltage stabilizing didoe D6 provides power supply to the oscillating circuit of being made up of resistance R 3, bidirectional diode D8, D9, capacitor C 3, C4, time-base integrated circuit IC1 (model can be 555) 6 (EDM Generator of Adjustable Duty Ratio).In addition, form start-up circuit 5 by capacitor C 2, diode D7, resistance R 5, field effect transistor VT2, U2 in the charging process, produces voltage U 3 at field effect transistor VT2 grid to capacitor C 2 chargings of start-up circuit 5, makes field effect transistor VT2 conducting.Because field effect transistor VT2 conducting makes above-mentioned oscillating circuit 6 failure of oscillations, the 3 pin output high level of time-base integrated circuit IC1, control circuit for electromagnet 3 conductings that control is made up of field effect transistor VT1, electromagnet 4 gets electric adhesive.After capacitor C 2 chargings finish, U3 drops to 0V, field effect transistor VT2 ends, above-mentioned oscillating circuit 6 starting of oscillations, 3 pin of time-base integrated circuit IC1 make periodically conducting of field effect transistor VT1 to field effect transistor VT1 grid output cyclic pulse signal, flow through pulse current in the electromagnet 4, this pulse current is very little, can't keep electromagnet 4 adhesives, so electromagnet 4 discharges.In addition, export the pulse duration of low voltage voltage control oscillation circuit 6 after bleeder circuit 7 dividing potential drops of direct voltage U2 via resistance R 2, R4 composition, and be inverse relation, just by utility grid voltage control pulse duration, line voltage is high more, and then U1 is high more, and pulsewidth is narrow more; Line voltage is low more, and then U1 is low more, and pulsewidth is wide more.The operating state of electromagnet 4 is determined by the operating state of oscillating circuit 6 fully.
Fig. 4 is shown another embodiment of oscillating circuit 6, it is by operational amplifier U1B, resistance R 4 ", R5 ", R6 ", R7 ", capacitor C 1 ", diode D1 ", D2 " forms oscillating circuit 6, forms pulse width control circuit by operational amplifier U1A, resistance R 1 ", R2 ", R3 ", R4 ".The output that connects start-up circuit 5 behind the bleeder circuit 7 of this pulse width control circuit input via resistance R 2, R4 composition is the drain electrode of field effect pipe VT2.
The core of operation principle of the present invention is:
1, the start-up circuit of being made up of capacitor C 2, diode D7, resistance R 5, field effect transistor VT2 5 is when capacitor C 2 chargings, make field effect transistor VT2 conducting, make oscillating circuit 6 failures of oscillations of forming by resistance R 3, bidirectional diode D8, D9, capacitor C 3, C4, time-base integrated circuit IC1, charging finishes back field effect transistor VT2 and ends, and oscillating circuit 6 recovers vibration.
2, by resistance R 2, R4 to the U1 dividing potential drop after, by diode D9 capacitor C 3 is charged, make the pulsewidth and the U1 of the 3 pin output of the time-base integrated circuit IC1 in the oscillating circuit 6 form inverse relation, promptly oscillating circuit 6 output pulse widths and line voltage size forms inverse relation.
Claims (3)
1, a kind of electromagnet control device, it comprises rectification circuit (1), step-down filter regulator circuit (2), control circuit for electromagnet (3), electromagnet (4), start-up circuit (5), bleeder circuit (7), the input of rectification circuit (1) connects mains supply, it is output as each circuit working power is provided, the input of start-up circuit (5) connects the output of step-down filter regulator circuit (2), control circuit for electromagnet (3) control electromagnet (4) carries out adhesive and release, the output of bleeder circuit (7) links to each other with the output of start-up circuit (5), it is characterized in that between the input of the output of start-up circuit (5) and control circuit for electromagnet (3) oscillating circuit (6) being arranged, described oscillating circuit (6) is by resistance R 3, diode D8, D9, capacitor C 3, C4, time-base integrated circuit IC1 forms, one end of resistance R 3, the anode of diode D9, the resistance R 2 of 7 pin of time-base integrated circuit IC1 and bleeder circuit (7), the tie point of resistance R 4 is connected with the drain electrode of the field effect transistor VT2 of start-up circuit (5), the other end of resistance R 3 is connected with the negative electrode of diode D8, the negative electrode of the anode of diode D8 and diode D9,2 of one end of capacitor C 3 and time-base integrated circuit IC1,6 pin connect, 4 of time-base integrated circuit IC1,8 pin are connected with step-down filter regulator circuit (2), 3 pin of time-base integrated circuit IC1 connect the grid of the field effect transistor VT1 in the control circuit for electromagnet (3), 5 pin of time-base integrated circuit IC1 connect an end of capacitor C 4, capacitor C 3,1 pin of the other end of C4 and time-base integrated circuit IC1 connects the negative output terminal of rectification circuit (1).
2, electromagnet control device according to claim 1 is characterized in that described rectification circuit (1) is made up of diode D1, D2, D3, D4; Step-down filter regulator circuit (2) is made up of resistance R 1, diode D5, capacitor C 1, voltage stabilizing didoe D6; Control circuit for electromagnet (3) is made up of field effect transistor VT1, start-up circuit (5) is made up of capacitor C 2, diode D7, resistance R 5 and field effect transistor VT2, the output that connects step-down filter regulator circuit (2) by capacitor C 2 is drawn in the input of start-up circuit (5) from the grid of field effect transistor VT2, the output of start-up circuit (5) connects the triggering input of oscillating circuit (6), the input that the output of oscillating circuit (6) connects control circuit for electromagnet (3) is the grid of field effect pipe VT1, and the output of control circuit for electromagnet (3) is drawn from the drain electrode of field effect transistor VT1 and connect electromagnet (4).
3, electromagnet control device according to claim 1 is characterized in that described oscillating circuit (6) output pulse width and line voltage size forms inverse relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100379598A CN100428390C (en) | 2006-01-19 | 2006-01-19 | Electromagnet control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100379598A CN100428390C (en) | 2006-01-19 | 2006-01-19 | Electromagnet control device |
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| Publication Number | Publication Date |
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| CN1815659A CN1815659A (en) | 2006-08-09 |
| CN100428390C true CN100428390C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100379598A Active CN100428390C (en) | 2006-01-19 | 2006-01-19 | Electromagnet control device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101404199B (en) * | 2008-07-01 | 2011-10-19 | 常熟开关制造有限公司(原常熟开关厂） | Electromagnet controller |
| CN101895215A (en) * | 2010-06-13 | 2010-11-24 | 德州学院 | Biological effect electromagnet system |
| CN105703584A (en) * | 2016-04-26 | 2016-06-22 | 威海顺意电机股份有限公司 | Asynchronous motor with built-in electromagnetic clutch device |
| CN110136918B (en) * | 2019-06-05 | 2020-11-06 | 中科新松有限公司 | Electromagnet protection circuit and control method thereof |
| CN110211828B (en) * | 2019-06-28 | 2024-03-29 | 神华包神铁路集团有限责任公司 | Control circuit of vacuum circuit breaker |
| CN110491620B (en) * | 2019-09-17 | 2024-05-10 | 陕西众力通用电器股份有限公司 | Electronic control type energy-saving integrated electromagnet with protection function |
| CN113359524A (en) * | 2021-06-07 | 2021-09-07 | 陈永英 | Shaking table control circuit for neonate of gynaecology and obstetrics |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634604A (en) * | 1986-06-25 | 1988-01-09 | Hitachi Ltd | Electromagnetic driving apparatus |
| CN2094792U (en) * | 1990-10-19 | 1992-01-29 | 沈正 | Low temp. in creasing high-efficient energy-saving dynmaic electricmagnetic driver |
| CN2148391Y (en) * | 1993-03-12 | 1993-12-01 | 贺东梅 | Power-saving contactor |
| JP2005243869A (en) * | 2004-02-26 | 2005-09-08 | Fuji Electric Fa Components & Systems Co Ltd | Electromagnet driver |
-
2006
- 2006-01-19 CN CNB2006100379598A patent/CN100428390C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634604A (en) * | 1986-06-25 | 1988-01-09 | Hitachi Ltd | Electromagnetic driving apparatus |
| CN2094792U (en) * | 1990-10-19 | 1992-01-29 | 沈正 | Low temp. in creasing high-efficient energy-saving dynmaic electricmagnetic driver |
| CN2148391Y (en) * | 1993-03-12 | 1993-12-01 | 贺东梅 | Power-saving contactor |
| JP2005243869A (en) * | 2004-02-26 | 2005-09-08 | Fuji Electric Fa Components & Systems Co Ltd | Electromagnet driver |
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| CN1815659A (en) | 2006-08-09 |
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