CN101090023A - High pressure operation quick release rectification circuit - Google Patents
High pressure operation quick release rectification circuit Download PDFInfo
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- CN101090023A CN101090023A CN 200710143509 CN200710143509A CN101090023A CN 101090023 A CN101090023 A CN 101090023A CN 200710143509 CN200710143509 CN 200710143509 CN 200710143509 A CN200710143509 A CN 200710143509A CN 101090023 A CN101090023 A CN 101090023A
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Abstract
This invention relates to a high voltage pick-up quick discharge commutation circuit including a commutation circuit, a high voltage pick-up circuit parallel to the commutation circuit, a trigger circuit and a timing circuit, in which, the input of the commutation circuit is connected to the supply switch of a motor, said pick-up circuit includes a field effect tube and an output coil, said trigger circuit includes a trigger diode and a first triode providing a trigger signal to the trigger diode, the timing circuit provides the delay time from high voltage piock up to normal work, at the instance when the motor switch is turned off, said trigger diode is triggered, the voltage of the two ends of the output coil is high, that is the high voltage pick-up and the working voltage of the two ends of the coil is the relative low voltage.
Description
Technical field
The present invention relates to Motor Control Field, relate in particular to the rectifier control circuit of control electric motor clutch or brake adhesive and release.
Background technology
At present, the three phase alternating current motor of using in the fields such as chemical industry, building, lathe adopts electromagnetic clutch and brake to control the adhesive and the release of armature mostly.With the electromagnetic brake is example, and behind electrical power, brake is direct current with alternating current by the rectification circuit rectification, and at this moment, armature adhesive under the effect of electromagnetic field makes brake disc be in rotatable state, and motor is freely rotated; When the motor dead electricity, armature is withstood by spring, the rear end cap of brake disc and motor is pressed together and stops operating.
So, the rectification circuit of existing electromagnetic brake, the general unilateral diode that adopts comes the unidirectional conducting of Control current, behind electrical power, control circuit will just produce electric current and will make the armature adhesive after will having the regular hour to postpone, and the voltage at the brake coil two ends during adhesive is relatively low, and the armature sucting speed is slow; Simultaneously after the motor dead electricity, brake also will have just braking after the delay of certain hour, and the rate of release of armature is also slow, and this not only influences the startup of motor and stops performance, and for a long time like this, will influence the useful life of motor.
Summary of the invention
The purpose of this invention is to provide the clutch of a motor or the rectifier control circuit of brake adhesive and release, it can provide the control circuit of clutch or the adhesive of brake high pressure, rapid release, improve electric motor starting and stop performance, improve the useful life of motor.
For achieving the above object, the technical solution used in the present invention is as follows: a kind of high pressure operation quick release rectification circuit comprises a rectification circuit, the high pressure attraction circuit in parallel with this rectification circuit, circuits for triggering and timing circuit; The input termination electric power switch of described rectification circuit, described high pressure attraction circuit comprises field effect transistor and output winding; Described circuits for triggering comprise that by the diac and first triode, described first triode provides triggering signal to diac; Timing circuit comprises the capacitance resistance series circuit and second triode, and the collector electrode of described second triode links to each other with the base stage of first triode.
Described rectification circuit is a bridge rectifier, comprises a bidirectional triode thyristor that links to each other with described diac.
The grid of described field effect transistor joins by resistance and rectification circuit, is connected to voltage stabilizing didoe between grid and source electrode, and its drain electrode is serially connected with output winding, and described output winding two ends are parallel with piezo-resistance to protect this output winding.
Described high pressure attraction circuit comprises that one is parallel to the filter circuit between field effect transistor source electrode and output winding.
In the moment after the motor switch closure, the described first triode conducting also provides triggering signal to diac, and described rectification circuit is full-wave rectification, and the output voltage at described output winding two ends is a high pressure.
After the closed process time-delay of motor switch, described electric capacity is finished charging, the described second triode conducting, described first triode ends, described diac ends, and described rectification circuit is a halfwave rectifier, and the output voltage at described output winding two ends is a relatively low pressure.
Described timing circuit also comprises one the 3rd triode and a biasing circuit, and this biasing circuit provides the base stage of bias voltage to the 3rd triode, and after the motor switch closure, the 3rd triode is in cut-off state.
After motor switch disconnected, described electric capacity was by described the 3rd triode discharge.
After motor switch disconnected, described field effect transistor was ended immediately, described output winding fast break.
Owing to adopt such scheme, i.e. be high pressure during electromagnetic clutch or brake adhesive, make it can quick pick-up, improve the electric motor starting performance; And the operating voltage after the adhesive transfers relative low pressure to, has saved electric energy, simultaneously, when needs releasing clutch or brake, because the switching speed of field effect transistor is very fast, so get final product rapid release armature as long as disconnect motor switch, reduce the idle running of motor etc., improve motor useful life.
Description of drawings
Fig. 1 is the circuit theory diagrams of first embodiment of the invention;
Fig. 2 is the circuit theory diagrams of second embodiment of the invention.
Embodiment
Show as Fig. 1, high pressure operation quick release rectification circuit shown in the first embodiment of the invention, the supply voltage of motor is 220V in the present embodiment, this high pressure operation quick release rectification circuit comprises bridge rectifier 1, the high pressure attraction circuit 2 in parallel with this bridge rectifier, circuits for triggering 3 and are circuit 4 regularly.
Rectification circuit 1 is that direct current offers brake or clutch (following is the example explanation with the brake) with the AC rectification of motor input, the input termination electric power switch SW of this rectification circuit 1, comprise by diode D1, D2, D3, the bridge rectifier that D4 and bidirectional triode thyristor BT1 form, bidirectional triode thyristor BT1 also can be an one-way SCR in other embodiments.Rectification circuit 1 also comprises the filter circuit of a parallel connection, and this filter circuit is made up of capacitor C 1.
High pressure attraction circuit 2 comprises resistance R 12 and the field effect transistor CM1 that is connected in rectification circuit 1 one ends; resistance R 12 is connected on the grid of field effect transistor CM1; simultaneously between the grid of field effect transistor CM1 and source electrode and after being connected to resistance R 13 and voltage stabilizing didoe DW4; field effect transistor CM1 drain electrode is connected with an output winding L; this output winding L is the coil of electromagnetic brake, and an output winding L two ends piezo-resistance S also in parallel is with protection output winding L.
Circuits for triggering 3 provide a triggering signal to rectification circuit 1, comprise resistance R 3, R4, the first triode Q1, voltage stabilizing didoe DW1, capacitor C 3, and diac BT2 forms, wherein the emitter of the first triode Q1 and diac BT2 link to provide triggering signal to diac BT2, and the bidirectional triode thyristor BT1 of the diac BT2 other end and rectification circuit links.
Timing circuit 4 provides motor by connecting the delay time of adhesive to operate as normal, by the second triode Q2, the 3rd triode Q3 and capacitor C 4, and diode D9, voltage stabilizing didoe DW2, and resistance R 5, R6, R11 composition.Wherein resistance R 5 and capacitor C 4 are formed the RC series circuit, are parallel with the biasing circuit of the second triode Q2 at the two ends of capacitor C 4, and this biasing circuit comprises voltage stabilizing didoe DW2, resistance R 6, R11.The base stage of the collector electrode of the second triode Q2 and the first triode Q1 is joined, and its emitter connects common port (earth terminal).Simultaneously, also be parallel with the discharge loop of capacitor C 4 at the two ends of capacitor C 4, this discharge loop comprises the 3rd triode Q3 and diode D9.
The 3rd triode Q3 is the triode of a positive-negative-positive, and it has a biasing circuit 5, and biasing circuit 5 provides triode Q3 biasing, by diode D8, and voltage stabilizing didoe DW3, capacitor C 5, and resistance R 7, R8 forms.
After motor switch SW closure, the electric current diode D1 that at first flows through, D2, resistance R 12, R13 and voltage stabilizing didoe DW4 are to the grid of field effect pipe CM1 and make its conducting, and output winding L two ends produced voltage and made the adhesive of brake armature this moment; Simultaneously, through another road of electric current of diode D1 circuits for triggering 3 of flowing through, by making triode Q1 conducting after the resistance R 4, and by diac BT2 triggering bidirectional triode thyristor BT1, make rectification circuit be in the state of full-wave rectification, this moment, the voltage at output winding L two ends was relatively high pressure (approximately 198V), constituted the high pressure adhesive.
When the closed after-current of motor switch SW passes through timing circuit 4 simultaneously, and at first give capacitor C 4 chargings, electric capacity is full of after approximately through 2 seconds (determining according to capacitance parameter etc.), the second triode Q2 is switched on, the collector potential of the second triode Q2 is by high step-down, because the collector electrode of the second triode Q2 and the base stage of the first triode Q1 are joined, so the first triode Q1 base potential is step-down and being cut off also, diac BT2 loses triggering signal and stops to trigger, so the diode D4 and the bidirectional triode thyristor BT1 one tunnel of rectification circuit are cut off, the rectification circuit of this moment is in the state of halfwave rectifier, the operating voltage at coil two ends is the voltage of operate as normal, is relative low pressure (being approximately 98V).
When the closed after-current of motor switch SW is flowed through the biasing circuit 5 of the 3rd triode Q3, because the voltage of the 3rd triode Q3 base stage is greater than the voltage of emitter, so this triode Q3 is in the state that ends.
After electric power switch SW disconnects; because the switching speed of field effect transistor is very fast; field effect transistor CM1 is with fast break, and coil L also discharges fast break the adhesive to armature, and piezo-resistance S produces release coil L owing to fast break self induction voltage forms the protective circuit to coil L.And this moment because the disconnection of switch SW, make current potential conducting of the 3rd triode Q3 base stage by high step-down, capacitor C 4 is by the 3rd triode Q3 discharge, charging is ready once more after motor switch SW closure next time for capacitor C 4.
Fig. 2 is shown second embodiment of the invention, itself and first embodiment are basic identical, difference is according to the place difference of using, the motor power voltage of present embodiment rectification circuit input is 380V, filter circuit is by two capacitor C 1, and C2 is in series, and first triode is substituted by the stronger field effect transistor CM2 of voltage endurance capability, the parameter of piezo-resistance and field effect transistor is difference to some extent, and the operation principle of its circuit is identical with first embodiment.
Technology contents of the present invention and technical characterictic disclose as above, yet those of ordinary skill in the art still may be based on teaching of the present invention and announcements and done all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to the content that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by the present patent application claim.
Claims (10)
1. high pressure operation quick release rectification circuit, it is characterized in that: this high pressure operation quick release rectification circuit comprises a rectification circuit, the high pressure attraction circuit in parallel with this rectification circuit, circuits for triggering and timing circuit; The input termination electric power switch of described rectification circuit, described high pressure attraction circuit comprises field effect transistor and output winding; Described circuits for triggering comprise that by the diac and first triode, described first triode provides triggering signal to diac; Timing circuit comprises the capacitance resistance series circuit and second triode, and the collector electrode of described second triode links to each other with the base stage of first triode.
2. high pressure operation quick release rectification circuit according to claim 1 is characterized in that described rectification circuit is a bridge rectifier, comprises a bidirectional triode thyristor that links to each other with described diac.
3. high pressure operation quick release rectification circuit according to claim 1 is characterized in that the grid of described field effect transistor joins by biasing resistor and rectification circuit, is connected to voltage stabilizing didoe between grid and source electrode, and its drain electrode is serially connected with output winding.
4. high pressure operation quick release rectification circuit according to claim 1 is characterized in that described output winding two ends are parallel with piezo-resistance to protect this output winding.
5. high pressure operation quick release rectification circuit according to claim 1 is characterized in that described rectification circuit comprises the filter circuit of a parallel connection.
6. high pressure operation quick release rectification circuit according to claim 1, it is characterized in that described first triode can provide triggering signal to diac, after diac triggered, rectification circuit was full-wave rectification, and the output voltage at described output winding two ends is a high pressure.
7. high pressure operation quick release rectification circuit according to claim 1 is characterized in that the biasing circuit of the capacitance resistance series circuit of described timing circuit as first triode, and it also comprises another voltage stabilizing didoe.
8. high pressure operation quick release rectification circuit according to claim 1, it is characterized in that described timing circuit also comprises one the 3rd triode and a biasing circuit, this biasing circuit provides the base stage of bias voltage to the 3rd triode, makes the 3rd transistor base become electronegative potential by high potential.
9. high pressure operation quick release rectification circuit according to claim 8 is characterized in that, described the 3rd triode forms described capacitance discharges loop.
10. high pressure operation quick release rectification circuit according to claim 1 is characterized in that described first triode is a field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710143509 CN101090023A (en) | 2007-08-08 | 2007-08-08 | High pressure operation quick release rectification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710143509 CN101090023A (en) | 2007-08-08 | 2007-08-08 | High pressure operation quick release rectification circuit |
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| CN101090023A true CN101090023A (en) | 2007-12-19 |
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| CN 200710143509 Pending CN101090023A (en) | 2007-08-08 | 2007-08-08 | High pressure operation quick release rectification circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136342A (en) * | 2010-12-29 | 2011-07-27 | 浙江南瑞科技有限公司 | Circuit for driving electromagnet at high speed |
| CN103100785A (en) * | 2013-02-28 | 2013-05-15 | 广州市长胜焊接设备实业有限公司 | Digitization inversion arc welding machine output pole short circuit automatic protection system |
| CN103871712A (en) * | 2012-12-12 | 2014-06-18 | 肖国樑 | Double-coil combined direct current traction electromagnet |
| CN110265205A (en) * | 2018-03-12 | 2019-09-20 | 托马斯马格尼特股份有限公司 | Calutron and method for running this calutron |
-
2007
- 2007-08-08 CN CN 200710143509 patent/CN101090023A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136342A (en) * | 2010-12-29 | 2011-07-27 | 浙江南瑞科技有限公司 | Circuit for driving electromagnet at high speed |
| CN102136342B (en) * | 2010-12-29 | 2012-09-26 | 浙江南瑞科技有限公司 | Circuit for driving electromagnet at high speed |
| CN103871712A (en) * | 2012-12-12 | 2014-06-18 | 肖国樑 | Double-coil combined direct current traction electromagnet |
| CN103100785A (en) * | 2013-02-28 | 2013-05-15 | 广州市长胜焊接设备实业有限公司 | Digitization inversion arc welding machine output pole short circuit automatic protection system |
| CN103100785B (en) * | 2013-02-28 | 2015-11-25 | 广州长胜机电有限公司 | A kind of digitlization inverter arc welding machine output stage short circuit automatic protective system |
| CN110265205A (en) * | 2018-03-12 | 2019-09-20 | 托马斯马格尼特股份有限公司 | Calutron and method for running this calutron |
| CN110265205B (en) * | 2018-03-12 | 2022-09-23 | 托马斯马格尼特股份有限公司 | Electromagnetic device and method for operating the same |
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Open date: 20071219 |