CN103198977A - Contactor coil power supply circuit - Google Patents
Contactor coil power supply circuit Download PDFInfo
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- CN103198977A CN103198977A CN2013101100553A CN201310110055A CN103198977A CN 103198977 A CN103198977 A CN 103198977A CN 2013101100553 A CN2013101100553 A CN 2013101100553A CN 201310110055 A CN201310110055 A CN 201310110055A CN 103198977 A CN103198977 A CN 103198977A
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Abstract
The invention provides a contactor coil power supply circuit which comprises a direct current voltage stabilization power supply unit, an energy storage unit and a control switch. The energy storage unit is connected with a contactor coil through the control switch. The direct current voltage stabilization power supply unit comprises a control sub unit, a direct current converter, an output sub unit and a feedback sub unit. The direct current converter is used for achieving direct current voltage conversion. An input end of the output sub unit is connected with an output end of the direct current converter and an output end of the output sub unit is connected with the energy storage unit. The feedback sub unit is used for obtaining feedback voltage and current from the output sub unit. The control sub unit is used for adjusting output voltage of the direct current converter according to the feedback voltage and the current. The contactor coil power supply circuit can improve stability of contactor coil power supply and solve the problem of large current impact when a pull-in phenomenon of a contactor occurs.
Description
Technical field
The present invention relates to the contactor field, more particularly, relate to a kind of contactor coil power supply circuits.
Background technology
Contactor refer to frequently to close close, carry and cut-off normal current and regulation overload current cut-off and the pass attaches together and puts, it is applicable to far distance controlled, is the critical elements in the automatic control system.At present, contactor is widely used in the start and stop of Electric Machine Control, blower fan, pump equipment etc.Contactor being cut-off and when control closed in the pass, generally is to realize by the power supply circuits of the coil in the control contactor: when contactor coil energising back produces very strong magnetic field, make to drive adhesive magnet action in the contactor contactor pass and close; When contactor coil cut off the power supply, adhesive magnet separately drove contactor and cut-offs.
Existing contactor generally adopts direct current or Alternating Current Power Supply.When adopting Alternating Current Power Supply, directly powered to contactor by electrical network; When adopting direct current supply, need adopt line voltage not control and power to contactor after rectification is converted to direct current.
In actual applications, the voltage ripple of power network scope is bigger, make the contactor coil scope range of the fluctuation of voltage also bigger, thereby surpass the voltage range that contactor coil allows, and may cause following problem: probe of contactor pressure may be not enough when the contactor coil brownout, cause the excessive and heating scaling loss contact of contact position resistance, also can cause adhesive simultaneously after the iron core noise big; When the contactor coil overtension, may cause too high or scaling loss of coil temperature rise etc.
In addition, flicker also may appear in line voltage, and for example low-voltage is passed through situation, and at this moment, passive release may cause contactor to open because power supply trouble causes wrong diagnosis to contactor because coil voltage descends.
The above-mentioned reliability that all can influence contactor work because of the line voltage problem of unstable.
Summary of the invention
The technical problem to be solved in the present invention is, the problem at above-mentioned contactor causes contact or coil damage, contactor wrong diagnosis to be opened because line voltage is unstable provides a kind of contactor coil power supply circuits.
The technical scheme that the present invention solves the problems of the technologies described above is, a kind of contactor coil power supply circuits are provided, it is characterized in that: comprise DC voltage-stabilizing power supply unit, energy-storage units and control switch, wherein: described energy-storage units is connected to contactor coil via control switch; Described DC voltage-stabilizing power supply unit comprises control subelement, DC converter, output subelement and feedback subelement; Described DC converter is used for realizing dc voltage conversion; Output, output that the input of described output subelement is connected to DC converter are connected to energy-storage units; Described feedback subelement is used for obtaining feedback voltage and electric current from the output subelement; Described control subelement is used for the output voltage according to described feedback voltage and electric current adjustment DC converter.
In contactor coil power supply circuits of the present invention, described DC converter is under described control subelement control, and output voltage is along with the rated voltage that reduces progressively to be lifted to energy-storage units of feedback current.
In contactor coil power supply circuits of the present invention, described DC voltage-stabilizing power supply unit comprises that also described commutator unit has the input port that connects AC network and the input that output is connected to DC converter for alternating current being transformed to galvanic commutator unit.
In contactor coil power supply circuits of the present invention, described DC voltage-stabilizing power supply unit also comprises the counnter attack subelement, and described counnter attack subelement has and connects the input that galvanic input port and output are connected to DC converter.
In contactor coil power supply circuits of the present invention, described DC voltage-stabilizing power supply unit also comprises commutator unit, counnter attack subelement and chooser unit; Described commutator unit has the input port that connects AC network and the first input end that output is connected to the chooser unit; Described counnter attack subelement has and connects second input that galvanic input port and output are connected to the chooser unit; The output of described chooser unit be connected to the input of DC converter and select first input end and second input in high one of magnitude of voltage import as power supply.
In contactor coil power supply circuits of the present invention, described chooser unit comprises diode, positive wire and cathode conductor, the first input end of this chooser unit and second input are connected to output via positive wire and cathode conductor respectively, and the first input end of described chooser unit or the positive terminal of second input are connected to positive conductor via described diode.
In contactor coil power supply circuits of the present invention, described energy-storage units is electric capacity or storage battery.
In contactor coil power supply circuits of the present invention, described control switch is field effect transistor, triode or relay.
Contactor coil power supply circuits of the present invention, the time be the contactor coil continued power by energy-storage units at voltage ripple of power network or flicker, and control DC converter by the control subelement and adjust the energy-storage units charging voltage according to feedback current, not only can improve the stability of contactor coil power supply, the heavy current impact problem in the time of also can solving the contactor adhesive.
Description of drawings
Fig. 1 is the schematic diagram of contactor coil power supply circuits embodiment of the present invention.
Fig. 2 is the schematic diagram of DC voltage-stabilizing power supply unit first example among Fig. 1.
Fig. 3 is the schematic diagram of DC voltage-stabilizing power supply unit second example among Fig. 1.
Fig. 4 is the schematic diagram of DC voltage-stabilizing power supply unit the 3rd example among Fig. 1.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
As shown in Figure 1, be the schematic diagram of contactor coil power supply circuits embodiment of the present invention.Contactor coil power supply circuits in the present embodiment comprise DC voltage-stabilizing power supply unit 100, energy-storage units 200 and control switch 300, wherein energy-storage units 200 is connected to contactor coil 400 via control switch 300, the direct current that DC voltage-stabilizing power supply unit 100 is used for providing stable is exported, thereby is energy-storage units 200 and contactor coil 400 power supplies.Above-mentioned energy-storage units 200 specifically can adopt energy-storage travelling wave tubes such as electric capacity, storage battery.Control switch 300 then can adopt field effect transistor, triode or relay etc.
As shown in Figure 2, be the schematic diagram of 100 1 examples of DC voltage-stabilizing power supply unit among Fig. 1.This DC voltage-stabilizing power supply unit 100 is by the AC network power supply, and it comprises control subelement 114, DC converter 112, output subelement 113, feedback subelement 115 and commutator unit 111.The input of commutator unit 111 is connected to AC network, output connects DC converter 112, is used for the alternating current of input is converted to direct current output, specifically can adopt full bridge rectifier etc.Output, output that the input of output subelement 113 is connected to DC converter 112 are connected to energy-storage units 200.DC converter 112 is used for realizing dc voltage conversion, just the direct current of input is converted to the direct current of specific voltage, and the direct current of this specific voltage is offered energy-storage units 200 and contactor coil 400 via output subelement 113.Feedback subelement 115 is used for obtaining feedback voltage and electric current (namely exporting output voltage and the electric current of subelement 113) from output subelement 113.Control subelement 114 is adjusted the output voltage of DC converter 112 according to the feedback voltage that comes self feed back subelement 115 and electric current.
Especially, above-mentioned DC converter 112 is under 114 controls of control subelement, and its output voltage is along with the rated voltage that reduces progressively to be lifted to energy-storage units 200 of feedback current.By this mode, when control switch 300 disconnects, can realize that energy-storage units 200 passes through low-voltage during by the charging of high voltage, overcurrent when low current charge, keep charging voltage stable after charging to rated voltage, so both can shorten the charging interval, can increase the useful life of energy-storage units 200 again.Particularly, the output voltage that above-mentioned control subelement 114 can make DC converter 112 is linear change or other curvilinear motions with the variation of feedback current, also can make DC converter 112 export first voltage when feedback current is in first scope, export second voltage (also output voltage can be divided into more amplitudes) in second scope time.
When above-mentioned contactor coil power supply circuits disconnected at control switch 300, DC voltage-stabilizing power supply unit 100 was energy-storage units 200 chargings; When control switch 300 closures, DC voltage-stabilizing power supply unit 100 and energy-storage units 200 are the contactor coil power supply simultaneously, and the energy when wherein energy-storage units 200 provides contactor coil 400 adhesives supports.When contactor coil 400 operate as normal, be contactor coil 100 power supplies by DC voltage-stabilizing power supply unit 100 mainly; When flicker appearred in line voltage, energy-storage units 200 was contactor coil 400 power supplies, thereby improves the reliability of contactor coil 400 power supplies.
As shown in Figure 3, be the schematic diagram of DC voltage-stabilizing power supply unit 100 another examples among Fig. 1.This DC voltage-stabilizing power supply unit 100 is by direct current supply, and it comprises counnter attack subelement 121, control subelement 124, DC converter 122, output subelement 123 and feedback subelement 125.
Above-mentioned counnter attack subelement 121 has and connects the input that galvanic input port and output are connected to DC converter 122, it can detect the both positive and negative polarity of input dc power, and when the input dc power reversal connection, disconnect input, avoid damaging the contactor coil power supply circuits.
As shown in Figure 4, be the schematic diagram of DC voltage-stabilizing power supply unit 100 another examples among Fig. 1.This DC voltage-stabilizing power supply unit 100 can connect AC network and DC power supply simultaneously, and it comprises counnter attack subelement 131, commutator unit 132, chooser unit 133, control subelement 136, DC converter 134, output subelement 135 and feedback subelement 137.
Above-mentioned commutator unit 132 has the input port that connects AC network and the first input end that output is connected to chooser unit 133; Counnter attack subelement 131 has the input port that connects DC power supply and second input that output is connected to chooser unit 133; The output of chooser unit 133 be connected to the input of DC converter and select first input end and second input in high one of magnitude of voltage import as power supply.
Particularly, above-mentioned chooser unit 133 can comprise diode, positive wire and cathode conductor, wherein the first input end of this chooser unit 133 and second input are connected to output via positive wire and cathode conductor respectively, and the positive terminal of first input end or second input is connected to positive conductor via diode.
In the above-mentioned contactor coil power supply circuits, in line voltage or DC input voitage just often, be transformed to specific voltage by line voltage or direct current input with input, thereby be the contactor coil power supply, and be the contactor coil continued power at voltage ripple of power network or when flicker by energy-storage units, and by the charging voltage of control subelement according to the size adjustment energy-storage units of feedback current control DC converter output voltage, not only can improve the stability of contactor coil power supply, the heavy current impact problem in the time of also can solving the contactor adhesive.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (8)
1. contactor coil power supply circuits, it is characterized in that: comprise DC voltage-stabilizing power supply unit, energy-storage units and control switch, wherein: described energy-storage units is connected to contactor coil via control switch; Described DC voltage-stabilizing power supply unit comprises control subelement, DC converter, output subelement and feedback subelement; Described DC converter is used for realizing dc voltage conversion; Output, output that the input of described output subelement is connected to DC converter are connected to energy-storage units; Described feedback subelement is used for obtaining feedback voltage and electric current from the output subelement; Described control subelement is used for the output voltage according to described feedback voltage and electric current adjustment DC converter.
2. contactor coil power supply circuits according to claim 1 is characterized in that: described DC converter is under described control subelement control, and output voltage is along with the rated voltage that reduces progressively to be lifted to energy-storage units of feedback current.
3. contactor coil power supply circuits according to claim 1 and 2, it is characterized in that: described DC voltage-stabilizing power supply unit comprises that also described commutator unit has the input port that connects AC network and the input that output is connected to DC converter for alternating current being transformed to galvanic commutator unit.
4. contactor coil power supply circuits according to claim 1 and 2, it is characterized in that: described DC voltage-stabilizing power supply unit also comprises the counnter attack subelement, and described counnter attack subelement has and connects the input that galvanic input port and output are connected to DC converter.
5. contactor coil power supply circuits according to claim 1 and 2, it is characterized in that: described DC voltage-stabilizing power supply unit also comprises commutator unit, counnter attack subelement and chooser unit; Described commutator unit has the input port that connects AC network and the first input end that output is connected to the chooser unit; Described counnter attack subelement has and connects second input that galvanic input port and output are connected to the chooser unit; The output of described chooser unit be connected to the input of DC converter and select first input end and second input in high one of magnitude of voltage import as power supply.
6. contactor coil power supply circuits according to claim 5, it is characterized in that: described chooser unit comprises diode, positive wire and cathode conductor, the first input end of this chooser unit and second input are connected to output via positive wire and cathode conductor respectively, and the first input end of described chooser unit or the positive terminal of second input are connected to positive conductor via described diode.
7. contactor coil power supply circuits according to claim 1 and 2, it is characterized in that: described energy-storage units is electric capacity or storage battery.
8. contactor coil power supply circuits according to claim 1 and 2, it is characterized in that: described control switch is field effect transistor, triode or relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110055.3A CN103198977B (en) | 2013-03-29 | 2013-03-29 | Contactor coil power supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110055.3A CN103198977B (en) | 2013-03-29 | 2013-03-29 | Contactor coil power supply circuits |
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| CN103198977A true CN103198977A (en) | 2013-07-10 |
| CN103198977B CN103198977B (en) | 2016-05-25 |
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| CN201310110055.3A Active CN103198977B (en) | 2013-03-29 | 2013-03-29 | Contactor coil power supply circuits |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610135A (en) * | 2016-03-30 | 2016-05-25 | 天津瑞能电气有限公司 | Protection device applied to power system control power supply |
| CN106474644A (en) * | 2016-12-02 | 2017-03-08 | 三汽车制造有限公司 | Water tower fire truck |
| CN112327984A (en) * | 2020-10-16 | 2021-02-05 | 苏州汇川技术有限公司 | Safety loop voltage regulating circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2457725Y (en) * | 2000-12-28 | 2001-10-31 | 北京通力环电气股份有限公司 | DC controller of AC contactor |
| CN2893904Y (en) * | 2005-12-01 | 2007-04-25 | 华为技术有限公司 | Energy-saving relay drive circuit device |
| US20120106020A1 (en) * | 2009-07-15 | 2012-05-03 | Weimin Huo | Switch circuit with independent dc power supply |
| CN202712066U (en) * | 2012-07-03 | 2013-01-30 | 阳光电源股份有限公司 | Power supply circuit of contactor coil |
-
2013
- 2013-03-29 CN CN201310110055.3A patent/CN103198977B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2457725Y (en) * | 2000-12-28 | 2001-10-31 | 北京通力环电气股份有限公司 | DC controller of AC contactor |
| CN2893904Y (en) * | 2005-12-01 | 2007-04-25 | 华为技术有限公司 | Energy-saving relay drive circuit device |
| US20120106020A1 (en) * | 2009-07-15 | 2012-05-03 | Weimin Huo | Switch circuit with independent dc power supply |
| CN202712066U (en) * | 2012-07-03 | 2013-01-30 | 阳光电源股份有限公司 | Power supply circuit of contactor coil |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610135A (en) * | 2016-03-30 | 2016-05-25 | 天津瑞能电气有限公司 | Protection device applied to power system control power supply |
| CN106474644A (en) * | 2016-12-02 | 2017-03-08 | 三汽车制造有限公司 | Water tower fire truck |
| CN112327984A (en) * | 2020-10-16 | 2021-02-05 | 苏州汇川技术有限公司 | Safety loop voltage regulating circuit |
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| Publication number | Publication date |
|---|---|
| CN103198977B (en) | 2016-05-25 |
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Effective date of registration: 20160222 Address after: 518101 Guangdong city of Shenzhen province Baoan District no 70 District Liu Xian two road Hongwei Dong Industrial Zone E Applicant after: Shenzhen Inovance Technology Co., Ltd. Applicant after: Suzhou Huichuan Technology Co.,Ltd. Address before: 518101 Guangdong city of Shenzhen province Baoan District no 70 District Liu Xian two road Hongwei Dong Industrial Zone E Applicant before: Shenzhen Inovance Technology Co., Ltd. Applicant before: Suzhou Huichuan Technology Co.,Ltd. Applicant before: Suzhou Monarch Control Technology Co., Ltd. |
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Effective date of registration: 20191121 Address after: 215000 No.16, Youxiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan Technology Co.,Ltd. Address before: 518101 Guangdong city of Shenzhen province Baoan District no 70 District Liu Xian two road Hongwei Dong Industrial Zone E Co-patentee before: Suzhou Huichuan Technology Co.,Ltd. Patentee before: Shenzhen Huichuan Technology Co., Ltd. |
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