CN104092461A - Coil synchronous alternating-current driving circuit - Google Patents
Coil synchronous alternating-current driving circuit Download PDFInfo
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- CN104092461A CN104092461A CN201410318363.XA CN201410318363A CN104092461A CN 104092461 A CN104092461 A CN 104092461A CN 201410318363 A CN201410318363 A CN 201410318363A CN 104092461 A CN104092461 A CN 104092461A
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Abstract
The invention discloses a coil synchronous alternating-current driving circuit which comprises an oscillating feedback control device, an oscillating circuit and a driven coil. The coil synchronous alternating-current driving circuit has the advantages of being suitable for coil efficient alternating-current driving and particularly suitable for low-frequency application and occasions where the frequency and the phase need to be accurately controlled. By means of the coil synchronous alternating-current driving circuit, under the condition that the external control frequency does not exist, an oscillator oscillates according to the inherent oscillation frequency and can be further stopped through the oscillating feedback control device, namely driving to the coil is stopped. The coil synchronous alternating-current driving circuit has the advantages of being simple in structure, low in cost, reliable in operation and high in driving efficiency.
Description
Technical field
The present invention relates to coil synchronous AC drive circuit, especially relate to improved electronic oscillating circuit and realize efficient interchange drive coil and can precisely control the synchronous drive circuit of its frequency, belong to electronic technology field.
Background technology
Phase-locked loop frequency combiner circuit and digital direct are bonded into circuit can produce needed frequency accurately, but these traditional circuit generations at present is all small-signal control frequency.In the time will exchanging the coil that drives certain power, as execution unit, magnetic field generation part, also will complete by power amplification circuit.There is the problem that efficiency is not high in simulation class power amplification circuit, thereby causes heating and waste electric energy.Switch power amplification circuit needs complicated switching circuit, increases cost, and produces the problems such as electromagnetic interference.General LC oscillating circuit, for example Kao Bizi (Colpitts) oscillating circuit or Hartley (Hartley) oscillating circuit, there is high driving efficiency, but its frequency is fixed by vibrate inductance L and capacitor C, and common LC loop self is stable not, particularly for low-frequency channel, numerical value and the volume of inductance L and capacitor C are relatively large, rare automatically controlled adjustment part, badly adjusts by electronics mode, is more difficult to realize the frequency being produced by digital circuit accurately and controls.
Summary of the invention
The object of the present invention is to provide a kind of coil synchronous AC drive circuit that can overcome above-mentioned technical problem, the present invention adopts fundamental oscillation circuit and the oscillatory feedback control device of drive coil, by oscillation circuit in control oscillating circuit, arrive the feedback of vibration driving tube, realized synchronizeing of frequency of oscillation and external control frequency, frequency of oscillation of the present invention can precisely be controlled by outside control frequency.The present invention is suitable for requirement and the accurate frequency of coil is efficiently exchanged to the occasion of driving, as alternating magnetic field generator.
Technical scheme of the present invention is: based on LC oscillating circuit, for example Kao Bizi (Colpitts) oscillating circuit or Hartley (Hartley) oscillating circuit, or the oscillating circuit that other comprises LC oscillation circuit, by increasing FEEDBACK CONTROL parts, control oscillation circuit enabling to the feedback of vibration driving, the frequency of oscillation of described oscillating circuit is synchronizeed with outside control frequency, and can follow within the specific limits described control frequency, the oscillation circuit of while due to the oscillating circuit at driven coil place is still in resonance condition, there is high efficiency, thereby realized, the efficient interchange of driven coil is driven.
The present invention includes oscillatory feedback control device, oscillating circuit, driven coil, described driven coil drives in the oscillation circuit of described oscillating circuit and by the oscillating current of oscillating circuit; Thereby described oscillatory feedback control device is controlled oscillating circuit according to control frequency, the driving frequency of oscillating circuit is synchronizeed with described control frequency.
Described oscillating circuit is one of Kao Bizi (Colpitts) oscillating circuit or Hartley (Hartley) oscillating circuit.
Described oscillatory feedback control device is one of MOS transistor npn npn, Unijunction Transistor, bipolar transistor, photoelectrical coupler, analog switch.
Described control frequency is bonded into circuit by phase-locked loop frequency combiner circuit or digital direct and produces; The driving frequency of oscillating circuit is identical with described control frequency.
The driving frequency of described oscillating circuit and described control frequency are frequency multiplication relations.
Coil synchronous AC drive circuit of the present invention is used for drive coil and produces open alternating magnetic field.
A kind of application of coil synchronous AC drive circuit of the present invention is by driving open coil to produce open alternating electromagnetic field.Coil synchronous AC drive circuit of the present invention also can be used for exchanging driving other coil, for example energy transducer of high-power ultrasonics in addition.
Advantage of the present invention is that the efficient interchange that is suitable for coil drives, is particularly suitable for the occasion that its frequency and phase place can be precisely controlled in low frequency applications and requirement, the present invention is not in the situation that there is no external control frequency, oscillator is by self intrinsic hunting of frequency, but also can close oscillator by FEEDBACK CONTROL parts, close the driving to coil, that the present invention has is simple in structure, cost is low, reliable, the feature simultaneously with high driving efficiency.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is typical application circuit schematic diagram of the present invention;
Fig. 3 is the driven line loop current curve synoptic diagram of typical application circuit of the present invention under different control frequencys;
Fig. 4 is the coil drive efficiency schematic diagram of typical application circuit of the present invention under different control frequencys.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
As shown in Figure 1; V1 is the power supply of circuit; L1 and R1 are driven coil; R1 is the internal resistance of described driven coil; L1 and R1 and C1, C2, R3, transistor Q1 and L2 have formed Kao Bizi (Colpitts) oscillating circuit, the equivalent internal resistance that wherein R2 is L2, and transistor Q2 is described oscillatory feedback control device; R3 is feedback resistance, the grid of diode D1 protection driving tube transistor Q1.V2 is described external control frequency, and R4 is its internal resistance.Described external control frequency V2 is bonded into circuit by phase-locked loop frequency combiner circuit and digital direct and produces frequency accurately.Transistor Q2 can be under the control of described external control frequency V2, control oscillation circuit and feed back to enabling of vibration driving switch pipe transistor Q1: when described external control frequency V2 is high potential, transistor Q2 conducting, bypasses and controls oscillation circuit to the feedback of transistor Q1; When described external control frequency V2 is electronegative potential, transistor Q2 cut-off, oscillator vibrates by its intrinsic mode.So the actual oscillation frequency of described circuit has specific synchronized relation with described external control frequency V2 within the specific limits, can be same frequency, also can two times or two times of above frequency multiplication relations, can also be frequency division relation.
In the situation that there is no external control frequency, if described external control frequency V2 is electronegative potential, Q2 is inoperative for oscillatory feedback control device transistor, and described oscillator is by self intrinsic hunting of frequency; If described external control frequency V2 is high potential, oscillatory feedback is by bypass completely, and described oscillator cuts out.
In a kind of typical application circuit of the present invention, as shown in Figure 2, V1 is the power supply of circuit, R7 is the internal resistance of source, L1 and R1 are driven coil, R1 is the internal resistance of described driven coil, L1 is the inductance of described driven coil, the R1 of described driven coil and L1 and C1, C2, R3, R5, C3, transistor Q1, C4 and L2 have formed Kao Bizi (Colpitts) oscillating circuit, the internal resistance that wherein R2 is L2, R5 is that transistor Q1 arranges working point, the grid of diode D7 protective transistor Q1, R3 is feedback resistance, transistor Q2 is described oscillatory feedback control device, R6 is the biasing resistor of transistor Q2, make it in the situation that there is no input signal, close described oscillator.Described external control frequency V2 is external control frequency, and R4 is its internal resistance.The frequency of oscillation of described oscillating circuit within the specific limits can be synchronous with described external control frequency V2, can be same frequency, also can two times or two times of above frequency multiplication relations.Implementing circuit as shown in Figure 2, under different frequency, as shown in Figure 3, its transverse axis is the time to the current waveform of described driven coil L1, the electric current that vertical pivot is coil.Described external control frequency V2 changes between 12kHz at 9.5kHz, and step frequency is 500Hz.As shown in Figure 4, the drive efficiency under different frequency is substantially in 90% left and right for the drive efficiency of described coil synchronous AC drive circuit.
The present invention utilizes described oscillatory feedback control device to control oscillation circuit to feed back to enabling of vibration driving switch pipe, namely by described oscillatory feedback control device, controlling vibration driving switch pipe closes completely or controlled by the feedback signal of oscillation circuit, for example, in the circuit of Fig. 2, when FEEDBACK CONTROL device Q2 conducting, Q1 oscillation switch pipe is in closed condition, the control of the loop feedback signal of not vibrated, when Q2 closes, can the be vibrated control of loop feedback signal of Q1, realize the synchronous of frequency of oscillation, in like manner can be applied to Hartley (Hartley) oscillating circuit, same realization exchanges and drives the synchronous high-efficiency of coil.
In as the circuit of Fig. 1 and Fig. 2, oscillatory feedback control device transistor Q2 is MOS transistor npn npn, and in side circuit, it can be also bipolar transistor, Unijunction Transistor, photoelectrical coupler, analog switch or other electronic switching devices.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in scope disclosed by the invention; the variation that can expect easily or replacement, all should be encompassed in the protection range of the claims in the present invention.
Claims (5)
1. coil synchronous AC drive circuit, is characterized in that, comprising: oscillatory feedback control device, oscillating circuit, driven coil, and described driven coil drives in the oscillation circuit of described oscillating circuit and by the oscillating current of oscillating circuit; Thereby described oscillatory feedback control device is controlled oscillating circuit according to control frequency, the driving frequency of oscillating circuit is synchronizeed with described control frequency.
2. coil synchronous AC drive circuit according to claim 1, is characterized in that, described oscillating circuit is one of Kao Bizi oscillating circuit or Hartley oscillation circuit.
3. coil synchronous AC drive circuit according to claim 1, is characterized in that, described oscillatory feedback control device is one of MOS transistor npn npn, Unijunction Transistor, bipolar transistor, photoelectrical coupler, analog switch.
4. coil synchronous AC drive circuit according to claim 1, is characterized in that, described control frequency is bonded into circuit by phase-locked loop frequency combiner circuit or digital direct and produces; The driving frequency of oscillating circuit is identical with described control frequency.
5. coil synchronous AC drive circuit according to claim 1, is characterized in that, the driving frequency of described oscillating circuit and described control frequency are frequency multiplication relations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410318363.XA CN104092461B (en) | 2014-07-03 | 2014-07-03 | Coil synchronous AC drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410318363.XA CN104092461B (en) | 2014-07-03 | 2014-07-03 | Coil synchronous AC drive circuit |
Publications (2)
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| CN104092461A true CN104092461A (en) | 2014-10-08 |
| CN104092461B CN104092461B (en) | 2018-01-23 |
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| CN201410318363.XA Active CN104092461B (en) | 2014-07-03 | 2014-07-03 | Coil synchronous AC drive circuit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4593255A (en) * | 1982-05-17 | 1986-06-03 | Sharp Kabushiki Kaisha | Varactor tuned Colpitts oscillator with compensating varactor for wide band width |
| CN85101811A (en) * | 1985-04-01 | 1987-01-10 | 株式会社日立制作所 | The method and apparatus of sampling processing vision signal |
| US5625327A (en) * | 1995-07-13 | 1997-04-29 | Gnuco Technology Corporation | Modified Colpitts oscillator for driving an antenna coil and generating a clock signal |
| CN1190284A (en) * | 1996-12-11 | 1998-08-12 | 阿尔卑斯电气株式会社 | Oscillating circuit |
| CN101924399A (en) * | 2010-04-12 | 2010-12-22 | 武汉大学 | Relay wireless power supply system based on magnetic resonance |
| CN102520015A (en) * | 2011-12-12 | 2012-06-27 | 北京航空航天大学 | Sensitive circuit type dew point measuring method |
| CN203933603U (en) * | 2014-07-03 | 2014-11-05 | 广州市易轩生物科技有限公司 | Coil synchronous AC drive circuit |
-
2014
- 2014-07-03 CN CN201410318363.XA patent/CN104092461B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4593255A (en) * | 1982-05-17 | 1986-06-03 | Sharp Kabushiki Kaisha | Varactor tuned Colpitts oscillator with compensating varactor for wide band width |
| CN85101811A (en) * | 1985-04-01 | 1987-01-10 | 株式会社日立制作所 | The method and apparatus of sampling processing vision signal |
| US5625327A (en) * | 1995-07-13 | 1997-04-29 | Gnuco Technology Corporation | Modified Colpitts oscillator for driving an antenna coil and generating a clock signal |
| CN1190284A (en) * | 1996-12-11 | 1998-08-12 | 阿尔卑斯电气株式会社 | Oscillating circuit |
| CN101924399A (en) * | 2010-04-12 | 2010-12-22 | 武汉大学 | Relay wireless power supply system based on magnetic resonance |
| CN102520015A (en) * | 2011-12-12 | 2012-06-27 | 北京航空航天大学 | Sensitive circuit type dew point measuring method |
| CN203933603U (en) * | 2014-07-03 | 2014-11-05 | 广州市易轩生物科技有限公司 | Coil synchronous AC drive circuit |
Non-Patent Citations (2)
| Title |
|---|
| 林伟雄: "LC振荡电路的分析及仿真", 《闽南师范大学学报(自然科学版)》 * |
| 章倩苓: "晶体管电路讲座（四）", 《电子技术》 * |
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| CN104092461B (en) | 2018-01-23 |
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Effective date of registration: 20190802 Address after: 510000 No. 7, Lianhua Road, Licheng Street, Zengcheng City, Guangzhou, Guangdong Province Patentee after: Guangzhou Hetai Garden Engineering Co., Ltd. Address before: 511300 Second and Fourth Floors of Building No. 509 Zengcheng Avenue, Licheng Street, Zengcheng City, Guangzhou City, Guangdong Province Patentee before: Yi Xuan bio tech ltd, Guangzhou |
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Effective date of registration: 20200724 Address after: Room 402, No. 248-3, Zengcheng Avenue, Licheng street, Zengcheng District, Guangzhou City, Guangdong Province Patentee after: GUANGZHOU YIXUAN BIOTECHNOLOGY Co.,Ltd. Address before: 510000 No. 7, Lianhua Road, Licheng Street, Zengcheng City, Guangzhou, Guangdong Province Patentee before: GUANGZHOU HETAI GARDEN ENGINEERING Co.,Ltd. |
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