CN102709129A - Permanent magnet undervoltage tripping device - Google Patents
Permanent magnet undervoltage tripping device Download PDFInfo
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- CN102709129A CN102709129A CN2012102110469A CN201210211046A CN102709129A CN 102709129 A CN102709129 A CN 102709129A CN 2012102110469 A CN2012102110469 A CN 2012102110469A CN 201210211046 A CN201210211046 A CN 201210211046A CN 102709129 A CN102709129 A CN 102709129A
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Abstract
The invention provides a permanent magnet undervoltage tripping device. The permanent magnet undervoltage tripping device comprises a permanent magnet and a movable iron core which is matched with the permanent magnet, wherein a single coil is wound on the movable iron core; and the single coil is connected with a drive circuit which is used for changing the current direction in the single coil. In the drive circuit of the permanent magnet undervoltage tripping device, a first relay and a second relay are respectively in a tripping state and a closed state in a power failure state, so that even when a microprocessor circuit fails and a backup capacitor does not store electricity, the tripping also can be finished by a tripper if only a high level has a voltage; when the microprocessor circuit works normally, a first capacitor stores the electricity, so that when other devices or circuits fail, the voltage of the high level is ensured; and therefore, the tripping can be finished by the tripper, and finally, equipment is protected and loss is avoided.
Description
Technical field
The present invention relates to a kind of low voltage switchgear, relate in particular to a kind of permanent magnetism device for under-voltage releasing equipment.
Background technology
Device for under-voltage releasing equipment is the core component of low voltage switchgear; Accessory as a kind of protective circuit; It has open circuit, defencive function such as electric leakage, under-voltage, overvoltage, imbalance, under-frequency, overfrequency, inverse probability, phase sequence; For the protection entire circuit, device for under-voltage releasing equipment is very important device, obviously is very important so reduce it self failure rate.The circuit of existing device for under-voltage releasing equipment has exactly been ignored it self safety problem; There is not to be provided with the safeguard measure when breaking down; In case a link generation problem in the device for under-voltage releasing equipment circuit, whole release will lose efficacy, and so protected equipment just probably breaks down; Cause equipment malfunction, cause any property loss.
Summary of the invention
The technical problem that the present invention will solve is: in order to solve existing device for under-voltage releasing equipment when self disabler; There is not the emergency protection measure; Cause protected equipment to thread off safely; Thereby break down, the invention provides a kind of permanent magnetism device for under-voltage releasing equipment that has the drive circuit of troubleshooting function and solve the problems referred to above.
The technical solution adopted for the present invention to solve the technical problems is: a kind of permanent magnetism device for under-voltage releasing equipment; Comprise permanent magnet and the moving core that is equipped with permanent magnet; Be wound with unicoil on the said movable core, said unicoil connects the drive circuit that is used for changing the unicoil sense of current.
Particularly; Said drive circuit comprises filter rectifier, voltage-stabilized power supply circuit, control circuit and the auxiliary element that is connected with main circuit that inserts electrical network successively; Be in series with the line voltage sample circuit that is used to gather the SA sampled signal of representing the line voltage height between said filter rectifier and the control circuit, said auxiliary element comprises first isolating diode, second isolating diode, the 3rd isolating diode, first capacitor, second capacitor and the 3rd resistance.
Particularly, said filter rectifier comprises EMC circuit and rectifier circuit, and the power input of said EMC circuit connects with electrical network; Said EMC circuit has first output and second output; Said first output is connected rectifier circuit respectively with second output, the output negativing ending grounding of said rectifier circuit, and said second output is connected with the positive pole of first isolating diode; The negative pole of said first isolating diode is linked into voltage-stabilized power supply circuit; Said voltage-stabilized power supply circuit connect successively the 3rd resistance and second capacitor, the minus earth of said second capacitor is parallel with the 3rd isolating diode on said the 3rd resistance; Said line voltage sampled signal comprises first divider resistance, second divider resistance; Connect successively between the output plus terminal of said rectifier circuit and the ground first divider resistance, second divider resistance, said SA sampled signal is the magnitude of voltage of drawing between first divider resistance and second divider resistance, the output plus terminal of said rectifier bridge is connected with the positive pole of second isolating diode; The negative pole of said second isolating diode connects the anodal of first capacitor and draws high level; The minus earth of said first capacitor, said control circuit comprise microcontroller circuit and current switching control circuit, and the output of said SA sampled signal and voltage-stabilized power supply circuit is linked in the microcontroller circuit respectively.
Concrete, said microcontroller circuit (4) comprises
BCD toggle switch: needing the occasion of delayed releasing, different toggle switch combinations is set, after said microprocessor reads this signal, confirming the delay time of delayed releasing;
Microprocessor: when the no-voltage delayed releasing; If the delay time that the BCD toggle switch is represented is non-vanishing; When time-delay arrived, microcontroller circuit Control current on-off control circuit was accomplished and is threaded off, if the delay time that the BCD toggle switch is represented is zero; Microcontroller circuit Control current on-off control circuit is accomplished dropout immediately, does not have time-delay.
Concrete; Said current switching control circuit comprises first relay and second relay; First control end of said microcontroller circuit is connected with second relay with first relay respectively with second control end, and said first relay comprises first contact, second contact, the 3rd contact and the 4th contact, the 7th contact and the 8th contact, and said second relay comprises the 5th contact and the 6th contact; Said unicoil two ends are connected with the 7th contact and the 8th contact respectively; Said first contact is connected high level with second contact, and said the 3rd contact is connected the 5th contact simultaneously with the 4th contact, the 6th contact ground connection.
Further, be trip status during said first relay electric-loss, electric back be an attracting state; During said second relay electric-loss is closure state, electric back be an off-state, said trip status is the 3rd contact and the 7th contacting; Second contact and the 8th contacting, said attracting state i.e. first contact and the 7th contacting, the 4th contact and the 8th contacting; Said closure state i.e. the 5th contact and the 6th contacting, and off-state i.e. the 5th contact and the disconnection of the 6th contact.
The invention has the beneficial effects as follows, in the drive circuit of this permanent magnetism device for under-voltage releasing equipment, first relay and second relay under power failure state, be in trip status and closure state respectively; Even therefore microcontroller circuit is malfunctioning, the reserve capacitor does not have storing electricity, as long as high level has voltage; That release equally can be accomplished dropout, and when operate as normal, first capacitor can store electric weight; Thereby when other components and parts or circuit are malfunctioning, guaranteed that high level still has voltage, thereby guaranteed that release can accomplish dropout; Finally protect equipment, avoided loss.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the circuit diagram of the optimum embodiment of permanent magnetism device for under-voltage releasing equipment of the present invention.
Among the figure 1, filter rectifier, 2, voltage-stabilized power supply circuit, 3, microcontroller circuit,
Embodiment
Combine accompanying drawing that the present invention is done further detailed explanation now.These accompanying drawings are the sketch map of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1, the invention provides a kind of permanent magnetism device for under-voltage releasing equipment, comprise permanent magnet and the moving core that is equipped with permanent magnet, be wound with unicoil on the said movable core, said unicoil connects the drive circuit that is used for changing the unicoil sense of current.
Drive circuit comprises filter rectifier 1, voltage-stabilized power supply circuit 2, control circuit and the auxiliary element that is connected with main circuit that inserts electrical network successively; Be in series with the line voltage sample circuit that is used to gather the SA sampled signal of representing the line voltage height between filter rectifier 1 and the control circuit, auxiliary element comprises the first isolating diode D1, the second isolating diode D2, the 3rd isolating diode D3, the first capacitor C1, the second capacitor C2 and the 3rd resistance R 3.
Filter rectifier 1 comprises EMC circuit and rectifier circuit BG; The power input of EMC circuit connects with electrical network, and the EMC circuit has the first output L1 and the second output N1, and the first output L1 is connected rectifier circuit BG respectively with the second output N1; The output negativing ending grounding of rectifier circuit BG; The second output N1 is connected with the positive pole of the first isolating diode D1, and the negative pole of the first isolating diode D1 is linked into voltage-stabilized power supply circuit 2, voltage-stabilized power supply circuit 2 connect successively the 3rd resistance R 3 and the second capacitor C2; The minus earth of the second capacitor C2; Be parallel with the 3rd isolating diode D3 on the 3rd resistance R 3, the line voltage sampled signal comprises the first divider resistance R1, the second divider resistance R2, and the first divider resistance R1, the second divider resistance R2 successively connect between the output plus terminal of rectifier circuit BG and the ground; The SA sampled signal is the magnitude of voltage of drawing between the first divider resistance R1 and the second divider resistance R2; The output plus terminal of rectifier bridge is connected with the positive pole of the second isolating diode D2, and the negative pole of the second isolating diode D2 connects the anodal of the first capacitor C1 and draws high level VH, the minus earth of the first capacitor C1; Control circuit comprises microcontroller circuit 3 and current switching control circuit, and the output of SA sampled signal and voltage-stabilized power supply circuit 2 is linked into respectively in the microcontroller circuit 3.
Microcontroller circuit (4) comprises
BCD toggle switch: needing the occasion of delayed releasing, different toggle switch combinations is set, after microprocessor reads this signal, confirming the delay time of delayed releasing;
Microprocessor: when the no-voltage delayed releasing; If the delay time that the BCD toggle switch is represented is non-vanishing; When time-delay arrived, microcontroller circuit 3 Control current on-off control circuits were accomplished and are threaded off, if the delay time that the BCD toggle switch is represented is zero; Microcontroller circuit 3 Control current on-off control circuits are accomplished dropout immediately, do not have time-delay.
The current switching control circuit comprises first relay J 1 and second relay J 2; First control end of microcontroller circuit 3 is connected with second relay J 2 with first relay J 1 respectively with second control end; First relay J 1 comprises the first contact Q, the second contact J, the 3rd contact P and the 4th contact K, the 7th contact M and the 8th contact N; Second relay J 2 comprises the 5th contact T and the 6th contact S, and the unicoil two ends are connected with the 7th contact M and the 8th contact N respectively, and the first contact Q is connected high level VH with the second contact J; The 3rd contact P is connected the 5th contact T simultaneously with the 4th contact K, the 6th contact S ground connection.
During first relay J, 1 dead electricity is trip status, and getting electric back is attracting state, is closure state during second relay J, 2 dead electricity; Getting electric back is off-state, and trip status i.e. the 3rd contact P and the 7th contact M connection, and the second contact J and the 8th contact N connect; Attracting state i.e. the first contact Q and the 7th contact M connection; The 4th contact K and the 8th contact N connect, and closure state i.e. the 5th contact T and the 6th contact S connection, and off-state i.e. the 5th contact T and the 6th contact S disconnection.
After powering on, microcontroller circuit 3 controls second relay J 2 gets electric, and the 5th contact T of second relay J 2 and the 6th contact S break off; No current passes through in the unicoil, remain static, when the SA sampled signal surpass the electrical network rated voltage 80% after; Microcontroller circuit 3 control earlier first relay J 1 gets electric adhesive, and it is closed to control second relay J, 2 dead electricity then, and the sense of current is VH-Q-M-N-K-ground in the unicoil; Movable core and permanent magnet adhesive, through tens of milliseconds time-delay, microcontroller circuit 3 controls second relay J 2 gets electric disconnection; Thereby accomplish an adhesive, microcontroller circuit 3 controls first relay J 1 is got back to the dead electricity trip status then.
When the SA sampled signal be lower than specified line voltage 50% the time; Microcontroller circuit 3 controls second relay J 2 dead electricity are closed; The sense of current in the unicoil is VH-J-N-M-P-ground, and movable core breaks away from permanent magnet, through after tens of milliseconds the time-delay; Microcontroller circuit 3 controls second relay J 2 gets electric disconnection, accomplishes once and threads off.
Key is, stops power supply the no-voltage delayed releasing stage at electrical network; The first capacitor C1 can store certain electric weight, even if the reserve electric weight so among the second capacitor C2 has been put in advance, microcontroller circuit 3 is not worked or damaged; Still there is certain voltage on the high level VH, because under powering-off state, first relay J 1 is defaulted as trip status; Second relay J 2 is defaulted as closure state; So the electric current that has one direction and be VH-J-N-M-P-ground is through unicoil, movable core breaks away from permanent magnet, threads off thereby accomplish.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification, must confirm its technical scope according to the claim scope.
Claims (6)
1. a permanent magnetism device for under-voltage releasing equipment comprises permanent magnet and the moving core that is equipped with permanent magnet, is wound with unicoil on the said movable core, it is characterized in that: said unicoil connects the drive circuit that is used for changing the unicoil sense of current.
2. permanent magnetism device for under-voltage releasing equipment according to claim 1; It is characterized in that: said drive circuit comprises filter rectifier (1), voltage-stabilized power supply circuit (2), the control circuit and the auxiliary element that is connected with main circuit that inserts electrical network successively; Be in series with the line voltage sample circuit that is used to gather the SA sampled signal of representing the line voltage height between said filter rectifier (1) and the control circuit, said auxiliary element comprises first isolating diode (D1), second isolating diode (D2), the 3rd isolating diode (D3), first capacitor (C1), second capacitor (C2) and the 3rd resistance (R3).
3. permanent magnetism device for under-voltage releasing equipment according to claim 1 or claim 2; It is characterized in that: said filter rectifier (1) comprises EMC circuit and rectifier circuit (BG); The power input of said EMC circuit connects with electrical network; Said EMC circuit has first output (L1) and second output (N1); Said first output (L1) is connected rectifier circuit (BG) respectively with second output (N1); The output negativing ending grounding of said rectifier circuit (BG); Said second output (N1) is connected with the positive pole of first isolating diode (D1), and the negative pole of said first isolating diode (D1) is linked into voltage-stabilized power supply circuit (2), said voltage-stabilized power supply circuit (2) connect successively the 3rd resistance (R3) and second capacitor (C2); The minus earth of said second capacitor (C2); Be parallel with the 3rd isolating diode (D3) on said the 3rd resistance (R3), said line voltage sampled signal comprises first divider resistance (R1), second divider resistance (R2), connect successively between the output plus terminal of said rectifier circuit (BG) and the ground first divider resistance (R1), second divider resistance (R2); Said SA sampled signal is the magnitude of voltage of drawing between first divider resistance (R1) and second divider resistance (R2); The output plus terminal of said rectifier bridge is connected with the positive pole of second isolating diode (D2), and the negative pole of said second isolating diode (D2) connects the anodal of first capacitor (C1) and draws high level (VH), the minus earth of said first capacitor (C1); Said control circuit comprises microcontroller circuit (3) and current switching control circuit, and the output of said SA sampled signal and voltage-stabilized power supply circuit (2) is linked into respectively in the microcontroller circuit (3).
4. like the said permanent magnetism device for under-voltage releasing equipment of claim 3, it is characterized in that: said microcontroller circuit (4) comprises
BCD toggle switch: needing the occasion of delayed releasing, different toggle switch combinations is set, after said microprocessor reads this signal, confirming the delay time of delayed releasing;
Microprocessor: when the no-voltage delayed releasing; If the delay time that the BCD toggle switch is represented is non-vanishing; When time-delay arrived, microcontroller circuit (3) Control current on-off control circuit was accomplished and is threaded off, if the delay time that the BCD toggle switch is represented is zero; Microcontroller circuit (3) Control current on-off control circuit is accomplished dropout immediately, does not have time-delay.
5. like the said permanent magnetism device for under-voltage releasing equipment of claim 3; It is characterized in that: said current switching control circuit comprises first relay (J1) and second relay (J2); First control end of said microcontroller circuit (3) is connected with second relay (J2) with first relay (J1) respectively with second control end; Said first relay (J1) comprises first contact (Q), second contact (J), the 3rd contact (P) and the 4th contact (K), the 7th contact (M) and the 8th contact (N); Said second relay (J2) comprises the 5th contact (T) and the 6th contact (S); Said unicoil two ends are connected with the 7th contact (M) and the 8th contact (N) respectively; Said first contact (Q) is connected high level (VH) with second contact (J), and said the 3rd contact (P) is connected the 5th contact (T) simultaneously with the 4th contact (K), the 6th contact (S) ground connection.
6. like the said permanent magnetism device for under-voltage releasing equipment of claim 5; It is characterized in that: during said first relay (J1) dead electricity is trip status; Getting electric back is attracting state, is closure state during said second relay (J2) dead electricity, and getting electric back is off-state; Said trip status i.e. the 3rd contact (P) is connected with the 7th contact (M); Second contact (J) is connected with the 8th contact (N), and said attracting state i.e. first contact (Q) is connected with the 7th contact (M), and the 4th contact (K) connects with the 8th contact (N); Said closure state i.e. the 5th contact (T) is connected with the 6th contact (S), and off-state i.e. the 5th contact (T) is broken off with the 6th contact (S).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210211046.9A CN102709129B (en) | 2012-06-26 | 2012-06-26 | Permanent magnet undervoltage tripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210211046.9A CN102709129B (en) | 2012-06-26 | 2012-06-26 | Permanent magnet undervoltage tripping device |
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| Publication Number | Publication Date |
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| CN102709129A true CN102709129A (en) | 2012-10-03 |
| CN102709129B CN102709129B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210211046.9A Active CN102709129B (en) | 2012-06-26 | 2012-06-26 | Permanent magnet undervoltage tripping device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767807A (en) * | 2018-07-25 | 2018-11-06 | 佛山科学技术学院 | A kind of 10kV breaker dual control trip circuits for distribution automation |
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| US5105326A (en) * | 1991-05-31 | 1992-04-14 | Westinghouse Electric Corp. | Circuit for controlling the orientation of a magnetic field |
| CN101625944A (en) * | 2009-08-03 | 2010-01-13 | 江苏国星电器有限公司 | Permanent magnet releaser |
| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN202616164U (en) * | 2012-06-26 | 2012-12-19 | 江苏国星电器有限公司 | Permanent magnet under-voltage release |
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2012
- 2012-06-26 CN CN201210211046.9A patent/CN102709129B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5105326A (en) * | 1991-05-31 | 1992-04-14 | Westinghouse Electric Corp. | Circuit for controlling the orientation of a magnetic field |
| CN101625944A (en) * | 2009-08-03 | 2010-01-13 | 江苏国星电器有限公司 | Permanent magnet releaser |
| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN202616164U (en) * | 2012-06-26 | 2012-12-19 | 江苏国星电器有限公司 | Permanent magnet under-voltage release |
Non-Patent Citations (1)
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| 吴志祥: "基于ATtiny单片机的永磁型欠压脱扣器的设计", 《工矿自动化》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767807A (en) * | 2018-07-25 | 2018-11-06 | 佛山科学技术学院 | A kind of 10kV breaker dual control trip circuits for distribution automation |
| CN108767807B (en) * | 2018-07-25 | 2023-10-31 | 佛山科学技术学院 | Dual-control tripping circuit for 10kV circuit breaker for distribution network automation |
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| CN102709129B (en) | 2015-06-10 |
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Effective date of registration: 20171103 Address after: Wujin District of Jiangsu city in Changzhou Province before 213177 Huang Zhen Zhai Bridge Industrial Park before the Village Road No. 3 Patentee after: Jiangsu Guoxing Electrical Apparatus Co.Ltd Address before: 213177 Jiangsu Changzhou Star Electric Appliance Co., Ltd., No. 3 middle Zhai Road, walled Industrial Park, Wujin District, Jiangsu Co-patentee before: Changzhou Polytechnic College Patentee before: Jiangsu Guoxing Electrical Apparatus Co.Ltd |
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