CN102136342B - Circuit for driving electromagnet at high speed - Google Patents
Circuit for driving electromagnet at high speed Download PDFInfo
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- CN102136342B CN102136342B CN201010611322A CN201010611322A CN102136342B CN 102136342 B CN102136342 B CN 102136342B CN 201010611322 A CN201010611322 A CN 201010611322A CN 201010611322 A CN201010611322 A CN 201010611322A CN 102136342 B CN102136342 B CN 102136342B
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Abstract
The invention discloses a circuit for driving an electromagnetic at a high speed. The circuit comprises an electromagnet-driving circuit and a voltage-multiplying circuit; the electromagnet-driving circuit comprises a first triode and a first diode; the voltage-multiplying circuit comprises a second triode, a capacitor, a first resistor and a second diode; when a trigger signal is in a low level, the first triode and the second triode are stopped, direct-current power charges the capacitor through the first resistor, and a voltage at both ends of the capacitor is a voltage difference V between an output voltage of the direct-current power and a voltage of the anode of the second diode; and when the trigger signal is in a high level, the second triode is saturated to be conducted so that the voltage at the current input end of the second triode approaches 0.6 volts, and the voltage instantly exerted at both ends of the electromagnet is a sum of the output voltage of the direct-current power and the voltage difference V. As the voltage at both ends of the electromagnet at the conducting moment is only twice the voltage at both ends of the electromagnet during direct-current power supplying, the operation speed of the electromagnet is increased.
Description
Technical field
The present invention relates to a kind of electromagnet high-speed driving circuit, be used for the DM high speed motion, can be widely used in the electromagnet is in the equipment or device of action (dropout) mechanism.
Background technology
Electromagnet has purposes widely in Industry Control, like electromagnetically operated valve, relay, contactor, it is a kind of typical electric energy-mechanical energy conversion device.Fig. 1 is a traditional typical solenoid driver circuit, and it injects electromagnet L2 through the on-off action of triode Q3 with electric energy, accomplishes the conversion of electric energy-magnetic energy-mechanical energy.
In some applications (like circuit breaker, high accuracy industrial process control appliance), require electromagnet to have higher even very high responsiveness.Typical way is to improve the driving voltage of electromagnet.But in typical solenoid driver circuit shown in Figure 1, driving voltage often receives the restriction of supply voltage and can not arbitrarily raise.The driving voltage how under the certain condition of supply voltage, effectively to promote electromagnet is the problem that the present invention solves to reach the target of its high speed motion.
Under the supply voltage certain condition, promoting solenoid actuated voltage has number of ways.As adopt step-up DC/DC circuit, but such circuit structure is complicated, cost is higher.
Summary of the invention
The technical problem that the present invention will solve is under the constant condition of supply voltage, a kind of electromagnet high-speed driving circuit simple in structure, with low cost to be provided.
According to the electromagnetism basic principle, realize the high-speed driving of electromagnet, just must in its coil, inject energy as far as possible at high speed, to produce enough big electromagnetic force at the initial time of solenoid actuated.According to this thinking; The present invention has designed a voltage-multiplying circuit on the basis of typical solenoid driver circuit; This circuit is promoted to the twice of supply voltage at the solenoid actuated initial time with the voltage at coil two ends, realizes that the high speed of energy is injected, and reaches the purpose of electromagnet high speed motion.
For solving the problems of the technologies described above, the invention provides a kind of electromagnet high-speed driving circuit, it comprises: solenoid driver circuit and voltage-multiplying circuit.
Said solenoid driver circuit comprises: first triode and first diode; The negative electrode of first diode connects DC power supply, and the anode of first diode links to each other with the current input terminal of first triode, and the negative electrode of first diode links to each other with the two ends of electromagnet respectively with anode; Said voltage-multiplying circuit comprises: second triode, electric capacity, first resistance and second diode; The control end of second triode links to each other with an end of a current-limiting resistance, and the other end of this current-limiting resistance is the triggering signal input, and the current input terminal of second triode links to each other with an end of first resistance and the anode of electric capacity, another termination DC power supply of first resistance; The negative electrode of electric capacity links to each other with the anode of second diode, the minus earth of second diode, the current output terminal ground connection of second triode; The control end of first triode links to each other with the control end of second triode, and the current output terminal of first triode links to each other with the negative electrode of electric capacity.
When the triggering signal from said triggering signal input input is low level; First triode and second triode end; Said DC power supply charges to electric capacity through first resistance, and the voltage at electric capacity two ends is the pressure reduction V of anode voltage of output voltage and said second diode of said DC power supply.
When the triggering signal from said triggering signal input input is high level; The second triode saturation conduction; The voltage of current input terminal that makes second triode is near 0.6 volt; Because the voltage at electric capacity two ends can not suddenly change, and the blocking-up in the second diode pair capacitor discharge loop and the acting in conjunction of the first triode conducting, the voltage that makes moment be applied to the electromagnet two ends is the output voltage and the said pressure reduction V sum of said DC power supply.Because the voltage of electromagnet conducting its voltage of moment when having only said DC power supply has improved nearly one times; The energy that the energy that is about to instantaneous injection electromagnet coil injects when having only said DC power supply has improved nearly one times, thereby has improved the responsiveness of electromagnet.
Further, described first triode is a FET, also can be bipolar transistor;
Further, described second triode is a bipolar transistor, also can be FET;
The present invention compares with traditional typical solenoid driver circuit, and remarkable advantages has improved the electromagnet responsiveness exactly.Compare with the boost scheme of DC/DC circuit of employing, have the advantage that circuit is succinct, cost is low.
Description of drawings
For content of the present invention is more clearly understood, below basis specific embodiment and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is traditional typical electrical magnet drives circuit theory diagrams;
Fig. 2 is an electromagnet high-speed driving circuit schematic diagram of the present invention.
Embodiment
See Fig. 2, the electromagnet high-speed driving circuit of present embodiment, it comprises: solenoid driver circuit and voltage-multiplying circuit.
Said solenoid driver circuit comprises: the first triode Q1 and the first diode D1; The negative electrode of the first diode D1 connects DC power supply, and the anode of the first diode D1 links to each other with the current input terminal of the first triode Q1, and the negative electrode of the first diode D1 links to each other with the two ends of electromagnet L1 respectively with anode; Said voltage-multiplying circuit comprises: the second triode Q2, capacitor C 1, first resistance R 1 and the second diode D2; The control end B of the second triode Q2 links to each other with the end of a current-limiting resistance R2; The other end of this current-limiting resistance R2 is triggering signal input Vin; The current input terminal C of the second triode Q2 links to each other with an end of first resistance R 1 and the anode of capacitor C 1, another termination DC power supply VDD of first resistance R 1; The negative electrode of capacitor C 1 links to each other with the anode of the second diode D2, the minus earth GND of the second diode D2, the current output terminal E ground connection GND of the second triode Q2; The control end G of the first triode Q1 links to each other with the control end B of the second triode Q2, and the current output terminal S of the first triode Q1 links to each other with the negative electrode of capacitor C 1.
When the triggering signal from said triggering signal input Vin input is low level; The first triode Q1 and the second triode Q2 end; To capacitor C 1 charging, the voltage that makes capacitor C 1 two ends is the pressure reduction V of anode voltage of output voltage V vdd and the said second diode D2 of said DC power supply VDD to said DC power supply through first resistance R 1.Pressure reduction V=Vvdd-0.6 volt.
When the triggering signal from said triggering signal input Vin input is high level; The second triode Q2 saturation conduction; The voltage of current input terminal C that makes the second triode Q2 is near 0.6 volt; Because the voltage at capacitor C 1 two ends can not suddenly change; And under the acting in conjunction of the second diode D2 to the blocking-up of capacitor C 1 discharge loop and the first triode Q1 conducting, the voltage that makes moment be applied to electromagnet L1 two ends is output voltage V vdd and the said pressure reduction V sum of said DC power supply VDD, i.e. the 2Vvdd-0.6 volt.Because the voltage of electromagnet conducting its voltage of moment when having only said DC power supply has improved nearly one times; The energy that the energy that is about to instantaneous injection electromagnet coil injects when having only said DC power supply has improved nearly one times, thereby has improved the responsiveness of electromagnet.
Said triggering signal Vin is by intelligent controller or the outputs of other circuit module such as single-chip microcomputer, PLC.
The said first triode Q1 is FET or bipolar transistor.The said second triode Q2 is bipolar transistor or FET.
As the execution mode of the best, the said first triode Q1 adopts FET, and the said second triode Q2 adopts bipolar transistor.Wherein, the control end G of the first triode Q1 is the grid of FET, and the current input terminal D of the first triode Q1 is the drain electrode of FET, and the current output terminal S of the first triode Q1 is the source electrode of FET.The control end B of the second triode Q2 is the base stage of bipolar transistor, and the current input terminal C of the second triode Q2 is the collector electrode of bipolar transistor, and the current output terminal E of the second triode Q2 is the emitter of bipolar transistor.The drain-source current Ids of the said first triode Q1 should be greater than the drive current of electromagnet L1, and the withstand voltage Vds of drain-source should be greater than 3VDD.The first diode D1 plays reverse afterflow effect, and its forward conduction electric current should be greater than the drive current of electromagnet L1, reverse withstand voltage should be greater than 3VDD.
The capacity of capacitor C 1 need be confirmed according to the driving energy of electromagnet L1; The resistance of first resistance R 1 then needs to confirm according to the charging interval of capacitor C 1; The forward conduction electric current of the second diode D2 should be greater than the drive current of electromagnet L1, reverse withstand voltage should be greater than the output voltage V DD of said DC power supply.The withstand voltage Vce of collection emitter-base bandgap grading of the second triode Q2 should be greater than 2VDD.
As another kind of embodiment, be in series with the 3rd resistance R 3 between the control end B of the control end G of the first triode Q1 and the second triode Q2.
As a kind of scheme that substitutes said the 3rd resistance R 3, the voltage stabilizing didoe of connecting between the control end B of the control end G of the first triode Q1 and the second triode Q2.
As other execution mode, the said first diode D1 can wait to substitute with piezo-resistance, resistor-capacitor series circuit, TVS pipe.
Obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not to be qualification to execution mode of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that thought of the present invention extends out and still are among protection scope of the present invention.
Claims (4)
1. an electromagnet high-speed driving circuit is characterized in that comprising: solenoid driver circuit and voltage-multiplying circuit;
Said solenoid driver circuit comprises: first triode (Q1) and first diode (D1); The negative electrode of first diode (D1) connects DC power supply, and the anode of first diode (D1) links to each other with the current input terminal of first triode (Q1), and the negative electrode of first diode (D1) links to each other with the two ends of electromagnet (L1) respectively with anode;
Said voltage-multiplying circuit comprises: second triode (Q2), electric capacity (C1), first resistance (R1) and second diode (D2); The control end (B) of second triode (Q2) links to each other with an end of a current-limiting resistance (R2); The other end of this current-limiting resistance (R2) is the triggering signal input; The current input terminal (C) of second triode (Q2) links to each other another termination DC power supply of first resistance (R1) with an end of first resistance (R1) and the anode of electric capacity (C1) respectively; The negative electrode of electric capacity (C1) links to each other with the anode of second diode (D2), the minus earth of second diode (D2), the current output terminal ground connection of second triode (Q2);
The control end (G) of first triode (Q1) links to each other with the control end (B) of second triode (Q2), and the current output terminal (S) of first triode (Q1) links to each other with the negative electrode of electric capacity (C1).
2. the said electromagnet high-speed driving circuit of claim 1; It is characterized in that: when the triggering signal from said triggering signal input input is low level; First triode (Q 1) and second triode (Q2) end; To electric capacity (C1) charging, the voltage that makes electric capacity (C1) two ends is the pressure reduction V of anode voltage of output voltage and said second diode (D2) of said DC power supply to said DC power supply through first resistance (R1);
When the triggering signal from said triggering signal input input is high level; Second triode (Q2) saturation conduction; The voltage of current input terminal (C) that makes second triode (Q2) is near 0.6 volt; Because the voltage at electric capacity (C1) two ends can not suddenly change, reach second diode (D2) to the blocking-up of electric capacity (C1) discharge loop and the acting in conjunction of first triode (Q1) conducting, the voltage that makes moment be applied to electromagnet (L1) two ends is the output voltage and the said pressure reduction V sum of said DC power supply.
3. claim 1 or 2 said electromagnet high-speed driving circuits, it is characterized in that: said second triode (Q2) is bipolar transistor or FET.
4. the said electromagnet high-speed driving circuit of claim 3, it is characterized in that: said first triode (Q1) is FET or bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010611322A CN102136342B (en) | 2010-12-29 | 2010-12-29 | Circuit for driving electromagnet at high speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010611322A CN102136342B (en) | 2010-12-29 | 2010-12-29 | Circuit for driving electromagnet at high speed |
Publications (2)
| Publication Number | Publication Date |
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| CN102136342A CN102136342A (en) | 2011-07-27 |
| CN102136342B true CN102136342B (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010611322A Expired - Fee Related CN102136342B (en) | 2010-12-29 | 2010-12-29 | Circuit for driving electromagnet at high speed |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311874A (en) * | 2013-05-10 | 2013-09-18 | 长城电器集团有限公司 | Tripping circuit for flux transformer |
| CN108153369A (en) * | 2017-12-08 | 2018-06-12 | 安徽泰德电子科技有限公司 | A kind of Household appliance switch control circuit |
| CN108538536A (en) * | 2018-03-22 | 2018-09-14 | 北京航天动力研究所 | A kind of accelerated release in vitro circuit and method based on two-way TVS |
| CN108982044A (en) * | 2018-06-12 | 2018-12-11 | 西安工程大学 | A kind of exciting bank for electric power pylon modal idenlification |
| CN109245025B (en) * | 2018-10-16 | 2024-05-10 | 常熟开关制造有限公司(原常熟开关厂） | Tripping circuit, tripping device and circuit breaker |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037612A (en) * | 1989-03-15 | 1989-11-29 | 李幼夫 | The fast drive circuit of electromagnetism winding |
| CN2406321Y (en) * | 2000-01-07 | 2000-11-15 | 连云港市机械研究所 | Double pressure controllable rectifier |
| CN1412568A (en) * | 2002-10-25 | 2003-04-23 | 华中科技大学 | D.C. current sensing device |
| CN101090023A (en) * | 2007-08-08 | 2007-12-19 | 赵维国 | High pressure operation quick release rectification circuit |
| CN101737551A (en) * | 2010-02-02 | 2010-06-16 | 中国航天科技集团公司烽火机械厂 | High-speed electromagnetic valve driver circuit |
-
2010
- 2010-12-29 CN CN201010611322A patent/CN102136342B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037612A (en) * | 1989-03-15 | 1989-11-29 | 李幼夫 | The fast drive circuit of electromagnetism winding |
| CN2406321Y (en) * | 2000-01-07 | 2000-11-15 | 连云港市机械研究所 | Double pressure controllable rectifier |
| CN1412568A (en) * | 2002-10-25 | 2003-04-23 | 华中科技大学 | D.C. current sensing device |
| CN101090023A (en) * | 2007-08-08 | 2007-12-19 | 赵维国 | High pressure operation quick release rectification circuit |
| CN101737551A (en) * | 2010-02-02 | 2010-06-16 | 中国航天科技集团公司烽火机械厂 | High-speed electromagnetic valve driver circuit |
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| CN102136342A (en) | 2011-07-27 |
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