CN104167938A - Pulsating current stabilizing control system - Google Patents
Pulsating current stabilizing control system Download PDFInfo
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- CN104167938A CN104167938A CN201410425109.XA CN201410425109A CN104167938A CN 104167938 A CN104167938 A CN 104167938A CN 201410425109 A CN201410425109 A CN 201410425109A CN 104167938 A CN104167938 A CN 104167938A
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Abstract
The invention discloses a pulsating current stabilizing control system which comprises a rectification circuit module, a filtration circuit module, a high frequency inverter conversion module, a high frequency transformer, a high frequency rectification circuit and a pulse width modulation module. The pulse width modulation module enables a stable control loop to be formed between the high frequency inverter conversion module and a load end, after input alternating currents are sequentially subjected to rectification, filtration and high frequency conversion, the high frequency currents at the output end of the high frequency rectification circuit are sampled by a sensor, a pulse width control unit is used for outputting high frequency driving control waveforms to drive a switch tube of the high frequency inverter conversion module to work on the duty ratio, and therefore stable pulsating currents are generated at the load end. According to the pulsating current stabilizing control system, a switch does no need to be connected at the output end in series for chopping, power output can achieve pulsating currents with stable output average values without inductance and large bulk capacitance, the reliability of input power factors and the entire system is improved, construction cost is greatly saved, and the influence on harmonic currents is small.
Description
Technical field
The present invention relates to Current Control field, be specifically related to a kind of pulsating current stabilizing control system.
Background technology
In current control circuit, due to certain application-specific, the required electric current of circuit load end be interrupted or time little pulse current waveform when large.The pulsating current control system of prior art is by a series of circuit, by rectification circuit and LC filter, electrical network is become to level and smooth direct current, form pulse output by the on-off action of electronic switch again, in order to realize described pulse current waveform, prior art is that direct tandem tap carries out copped wave in the load of DC power output end, control by the break-make to described electronic switch, make load end occur pulse current.In order to make the pulse current occurring can keep stable state, the output of DC power supply is essential enough level and smooth, therefore use large bulk capacitance to carry out filtering at Alternating Current Power Supply input, but the use of large bulk capacitance make input power factor low, larger to mains by harmonics current affects.The electronic switch of serial connection need bear larger peak current simultaneously, therefore must adopt the reliability of the expensive switching device guarantee pulse output that parameter surplus is larger, has inevitably increased the manufacturing cost of power supply.Output voltage electric current is just to output in load by LC filter and electronic switch module, electronic switch module is carried overall electric flux, so the multiple heat of consumptive material is large, electronic switch module is fragile under large electric current, cost is high and failure rate is high, and the manufacturing cost of DC power supply is further strengthened.
Summary of the invention
The object of the invention is to, in order to solve above deficiency, design a kind of pulsating current stabilizing control system, this system can provide output current mean value stable pulsating current, and its input power factor is high, and little on harmonic current impact, cost is low and reliability is strong.
In order to realize the technical scheme that the object of the invention takes be: pulsating current stabilizing control system, comprises the rectification circuit module, filter circuit module, high-frequency inversion modular converter, high frequency transformer and the high-frequency rectification circuit that connect successively; Described rectification circuit module is for being converted to direct current by interchange input electricity; The input of described filter circuit module is connected with the output of described rectification circuit module, by the clutter filtering in described direct current; The input of described high-frequency inversion modular converter is connected with the output of described filter circuit module, the output of high-frequency inversion modular converter is connected with described high frequency transformer, after filtered direct current is successively by described high-frequency inversion modular converter and high frequency transformer, changes high-frequency ac square-wave voltage into; Described high-frequency ac square-wave voltage changes pulse-shaped voltage into after described high-frequency rectification circuit; Also comprise pulse width modulation module, the input of described pulse width modulation module is connected with the output of described high-frequency rectification circuit, the output of described pulse width modulation module is connected with described high-frequency inversion modular converter, formation control loop between described high-frequency inversion modular converter and high-frequency rectification circuit, by the switching tube work duty ratio of described pulse width modulation module controls high-frequency inversion modular converter, thereby form stable pulsating current at the output of high-frequency rectification circuit.
Preferably, described pulse width modulation module comprises the transducer, RC integral filter circuit, comparator and the pulse width control unit that connect successively; Described transducer one end is connected with the output of high-frequency rectification circuit, and the transducer other end is connected with described RC integral filter circuit, and the output of pulse width control unit is connected with described high-frequency inversion modular converter;
Described transducer samples the high frequency output electric current of high-frequency rectification circuit, be high frequency voltage by described high frequency output current conversion, and be sent to described RC integral filter circuit, described high frequency voltage is converted into smooth dc voltage, then feed back to described pulse width control unit through described comparator, described pulse width control unit output high-frequency drive control waveform is to drive the switching tube work duty ratio of high-frequency inversion modular converter.
Preferably, described transducer is shunt or Hall element.
Preferably, described comparator is voltage comparator, and voltage comparator will be exported high level or low level after the reference voltage of the described smooth dc voltage receiving and comparator.
Preferably, described high-frequency inversion modular converter adopts full bridge inverter topology, and the high-frequency drive control waveform sending by described pulse width modulation module drives the switching tube work duty ratio of described full bridge inverter topology.
Preferably, described high-frequency inversion modular converter adopts the wherein a kind of of half-bridge inversion circuit topology, flyback inverter topology, excited inversion circuit topology or push-pull inverter circuit topology.
Preferably, described rectification circuit module is three-phase active rectification circuit.
Preferably, described rectification circuit module is three-phase bridge rectification circuit.
Preferably, described filter circuit module is electrochemical capacitor filter circuit or LC filter circuit.
Preferably, described high-frequency rectification circuit adopts full bridge rectifier or full-wave rectifying circuit.
Beneficial effect of the present invention is:
1, pulsating current stabilizing control system of the present invention arranges pulse width modulation module between high-frequency inversion modular converter and high-frequency rectification circuit output, make formation control loop between high-frequency inversion modular converter and the output of control system, the work duty ratio that the high-frequency drive control waveform of exporting by pulse width modulation module drives switching tube in high-frequency inversion modular converter, can realize at the output of pulsating current control system and form stable pulsating current.
2, the output of control system of the present invention does not need smooth waveform, overcome in traditional pulsating current control circuit for electrical input need large bulk capacitance to meet enough level and smooth requirements of DC power output end, because power output end does not need smooth waveform, therefore do not needing jumbo electric capacity for electrical input, only need to use the electric capacity of low capacity to filter the ripple of HFS, input power factor is improved greatly, will the impact of mains by harmonics electric current be reduced to minimum.
3, the present invention is by sampling to high-frequency rectification circuit output end current, and sampled signal is changed and compared, make the pulse width control unit output high-frequency drive control waveform in pulse width modulation module, regulate with this work duty ratio of controlling high-frequency inversion modular converter switching tube, by the continuous sampling to output current and the feedback of control loop, finally form the stable pulsating current of mean value at the output of control system.Save the use of the filter inductance that in prior art, cost is higher and large bulk capacitance, greatly saved power supply cost of manufacture.Avoid the use of the switching device of costliness in traditional pulsating current control technology, thereby in improving power supply reliability and efficiency, the cost of manufacture of further having saved whole power supply.
Brief description of the drawings
Fig. 1 is the structured flowchart of pulsating current stabilizing control system of the present invention;
Fig. 2 is the physical circuit figure of pulsating current stabilizing control system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
With reference to accompanying drawing 1 to shown in accompanying drawing 2, pulsating current stabilizing control system, comprises three-phase alternating current electrical input, rectification circuit module 1, filter circuit module 2, high-frequency inversion modular converter 3, high frequency transformer 4, high-frequency rectification circuit 5, pulse width modulation module 7 and load 6.
Described rectification circuit module 1 is connected with three-phase alternating current electrical input, three-phase alternating current is inputted to electricity and be converted to direct current, and described rectification circuit module 1 can be three-phase bridge rectification circuit, can be also three-phase active rectification circuit.The input of described filter circuit module 2 is connected with the output of described rectification circuit module 1, for by the clutter filtering of described direct current; Filter circuit module 2 can adopt electrochemical capacitor filter circuit, can be also LC filter circuit.
The input of described high-frequency inversion modular converter 3 is connected with the output of described filter circuit module 2, the output of high-frequency inversion change-over circuit 3 is connected with described high frequency transformer 4, changes high-frequency ac square-wave voltage into successively through filtered direct current by described high-frequency inversion modular converter 3 and high frequency transformer 4.Wherein high-frequency inversion modular converter 3 can adopt the one in full bridge inverter topology, half-bridge inversion circuit topology, flyback inverter topology, excited inversion circuit topology or push-pull inverter circuit topology.Described high-frequency ac square-wave voltage changes pulse-shaped voltage into after described high-frequency rectification circuit 5.Described high-frequency rectification circuit 5 is full bridge rectifier or full-wave rectifying circuit, and the output of high-frequency rectification circuit 5 connects described load 6.
The structure of described pulse width modulation module 7 can be improved according to different pwm chips and inverter circuit.In the present embodiment, described pulse width modulation module 7 comprises transducer 71, RC integral filter circuit 72, comparator 73 and pulse width control unit 74.Described transducer 71 can be shunt or Hall element.Described transducer 71 one end are connected with described high-frequency rectification circuit 5 outputs, and transducer 71 other ends are connected with described RC integral filter circuit 72.The output of described pulse width control unit 74 is connected with described high-frequency inversion modular converter 3.Described transducer 71 is sampled to the high frequency output electric current of described high-frequency rectification circuit 5, sample rate current signal is converted to high frequency voltage square-wave signal and is sent to described RC integral filter circuit 72, because the signal of sampling in the present invention is pulse signal, after sampling, signal need be done filtering processing and just can send into pulse width controller, and so the voltage of impulse wave or electric current output are just stable.RC integral filter circuit 72 sends voltage signal to comparator 73, feeds back to described pulse width control unit 74 through described comparator 73 after relatively, and described pulse width control unit 74 is exported high-frequency drive control waveform to described high-frequency inversion modular converter 3.Between described high-frequency inversion modular converter 3 and described load 6 ends, form stable control loop, control the switching tube work duty ratio of described high-frequency inversion modular converter 3 by described pulse width modulation module 7, produce the stable pulsating current of mean value at described load 6 ends.
Operation principle of the present invention is as follows:
The circuit input end access three-phase alternating current of pulsating current stabilizing control system, interchange input electricity is converted to direct current by the rectification circuit module 1 being connected with alternating current input, gained direct current enters the filter circuit module 2 being connected with the output of described rectification circuit module 1, described filter circuit module is by clutter unnecessary in direct current and noise removal, it is carried out becoming direct voltage after smoothing processing, then enter in described high-frequency inversion modular converter 3.The direct voltage of removing after clutter is converted to alternating voltage by described high-frequency inversion modular converter 3, and by alternating voltage and be added in two ends, the former limit of high frequency transformer 4, high frequency transformer 4 original edge voltages are after electromagnetic conversion, at secondary output required voltage.Secondary output high voltage waveform is the same with the high frequency voltage waveform that two ends, former limit obtain, and two voltage magnitudes are determined by former and deputy limit turn ratio.The high frequency voltage of secondary output, after the rectification of the high-frequency rectification circuit 5 that is connected with the output of described high frequency transformer 4, becomes the only impulse wave voltage with positive period.High frequency transformer 4 is isolated former limit high tension voltage and output voltage mutually, improves power supply output safety.
Described transducer 71 samples the high frequency output electric current I out from described high-frequency rectification circuit 5 outputs, and the high-frequency current shape large-signal of output is converted to high-frequency electrical swaging small-signal, because Iout is pulsating current, the voltage V that sampling obtains is pulsating voltage.The high frequency small voltage signal being converted to is transferred into RC integral filter circuit 72, first RC integral filter circuit 72 converts high frequency small voltage signal to sawtooth waveforms by discharging and recharging of electric capacity in the integrating circuit of RC integral filter circuit 72, then by the filter circuit in RC integral filter circuit 72, sawtooth waveforms is converted to a smooth dc voltage signal.Then the inverting input that this smooth dc voltage signal is delivered to described voltage comparator 73, voltage comparator 73 is compared this smooth dc voltage signal with the reference voltage signal of comparator, corresponding output high level or low level.Then the level signal obtaining is transported in PWM pulse width control unit 74, pulse width control unit 74 is according to the size of comparator output voltage, regulation output high-frequency drive control waveform, controls the switching tube work duty ratio of described high-frequency inversion modular converter with this.The technical scheme that adopts the present embodiment, the scope of described duty ratio is between 0-48%.Then by arriving output loading after high-frequency inversion modular converter, transformer isolation, output rectification conversion, so between high-frequency inversion modular converter 3 and load 6, form stable loop control network, to realize the stable pulsation duty ratio of output average current, by constantly the output current of high-frequency rectification circuit 5 outputs being sampled, by the modulation of pulse width modulation module and the continuous feedback of loop, finally form the stable pulsating current of output current mean value at load 6 ends.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned execution mode.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition,, although used some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. pulsating current stabilizing control system, is characterized in that, comprises the rectification circuit module, filter circuit module, high-frequency inversion modular converter, high frequency transformer and the high-frequency rectification circuit that connect successively;
Described rectification circuit module is for being converted to direct current by interchange input electricity; The input of described filter circuit module is connected with the output of described rectification circuit module, by the clutter filtering in described direct current; The input of described high-frequency inversion modular converter is connected with the output of described filter circuit module, the output of high-frequency inversion modular converter is connected with described high frequency transformer, after filtered direct current is successively by described high-frequency inversion modular converter and high frequency transformer, changes high-frequency ac square-wave voltage into; Described high-frequency ac square-wave voltage changes pulse-shaped voltage into after described high-frequency rectification circuit;
Also comprise pulse width modulation module, the input of described pulse width modulation module is connected with the output of described high-frequency rectification circuit, the output of described pulse width modulation module is connected with described high-frequency inversion modular converter, formation control loop between described high-frequency inversion modular converter and high-frequency rectification circuit, by the switching tube work duty ratio of described pulse width modulation module controls high-frequency inversion modular converter, thereby form stable pulsating current at the output of high-frequency rectification circuit.
2. pulsating current stabilizing control system according to claim 1, is characterized in that, described pulse width modulation module comprises the transducer, RC integral filter circuit, comparator and the pulse width control unit that connect successively;
Described transducer one end is connected with the output of high-frequency rectification circuit, and the transducer other end is connected with described RC integral filter circuit, and the output of pulse width control unit is connected with described high-frequency inversion modular converter;
Described transducer samples the high frequency output electric current of high-frequency rectification circuit, be high frequency voltage by high frequency output current conversion, and be sent to described RC integral filter circuit, described high frequency voltage is converted into smooth dc voltage, then feed back to described pulse width control unit through described comparator, described pulse width control unit output high-frequency drive control waveform drives the switching tube work duty ratio of high-frequency inversion modular converter.
3. pulsating current stabilizing control system according to claim 2, is characterized in that, described transducer is shunt or Hall element.
4. pulsating current stabilizing control system according to claim 2, is characterized in that, described comparator is voltage comparator, and voltage comparator will be exported high level or low level after the reference voltage of the described smooth dc voltage receiving and comparator.
5. pulsating current stabilizing control system according to claim 1 and 2, it is characterized in that, described high-frequency inversion modular converter adopts full bridge inverter topology, and the high-frequency drive control waveform sending by described pulse width modulation module drives the switching tube work duty ratio of described full bridge inverter topology.
6. pulsating current stabilizing control system according to claim 1 and 2, it is characterized in that, described high-frequency inversion modular converter adopts the wherein a kind of of half-bridge inversion circuit topology, flyback inverter topology, excited inversion circuit topology or push-pull inverter circuit topology.
7. pulsating current stabilizing control system according to claim 1, is characterized in that, described rectification circuit module is three-phase active rectification circuit.
8. pulsating current stabilizing control system according to claim 1, is characterized in that, described rectification circuit module is three-phase bridge rectification circuit.
9. pulsating current stabilizing control system according to claim 1, is characterized in that, described filter circuit module is electrochemical capacitor filter circuit or LC filter circuit.
10. pulsating current stabilizing control system according to claim 1, is characterized in that, described high-frequency rectification circuit adopts full bridge rectifier or full-wave rectifying circuit.
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| CN201410425109.XA CN104167938A (en) | 2014-08-25 | 2014-08-25 | Pulsating current stabilizing control system |
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| CN201410425109.XA CN104167938A (en) | 2014-08-25 | 2014-08-25 | Pulsating current stabilizing control system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106950439A (en) * | 2016-10-31 | 2017-07-14 | 丰宾电子（深圳）有限公司 | A kind of Reliability Test Instrument of alminium electrolytic condenser |
| CN108512240A (en) * | 2018-05-15 | 2018-09-07 | 镇江市产品质量监督检验中心 | A kind of hybrid energy-storing source current chop control system |
| CN109494997A (en) * | 2018-12-29 | 2019-03-19 | 云南电网有限责任公司电力科学研究院 | A kind of high frequency switch power based on MOSFET pipe |
| CN112865559A (en) * | 2020-12-31 | 2021-05-28 | 华工科技(广东)有限公司 | Intelligent frequency-shift water treatment control system and control method thereof |
| CN113037055A (en) * | 2021-02-05 | 2021-06-25 | 散裂中子源科学中心 | Long pulse solid-state modulator based on high-frequency transformer |
| CN113162254A (en) * | 2021-04-16 | 2021-07-23 | 中国矿业大学 | Multi-stage pulse switching voltage stabilizing circuit and voltage stabilizing method |
| CN115313847A (en) * | 2022-08-24 | 2022-11-08 | 四川杰诺创科技有限公司 | High-voltage power supply of electromagnetic compatible millimeter wave transmitter and generation method thereof |
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| CN102227867A (en) * | 2009-05-27 | 2011-10-26 | 松下电器产业株式会社 | Inverter control device and inverter control method |
| JP2013150459A (en) * | 2012-01-19 | 2013-08-01 | Daihen Corp | Control circuit of power conversion circuit, interconnection inverter system using the same, and single-phase pwm converter system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102227867A (en) * | 2009-05-27 | 2011-10-26 | 松下电器产业株式会社 | Inverter control device and inverter control method |
| JP2013150459A (en) * | 2012-01-19 | 2013-08-01 | Daihen Corp | Control circuit of power conversion circuit, interconnection inverter system using the same, and single-phase pwm converter system |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950439A (en) * | 2016-10-31 | 2017-07-14 | 丰宾电子（深圳）有限公司 | A kind of Reliability Test Instrument of alminium electrolytic condenser |
| CN108512240A (en) * | 2018-05-15 | 2018-09-07 | 镇江市产品质量监督检验中心 | A kind of hybrid energy-storing source current chop control system |
| CN109494997A (en) * | 2018-12-29 | 2019-03-19 | 云南电网有限责任公司电力科学研究院 | A kind of high frequency switch power based on MOSFET pipe |
| CN112865559A (en) * | 2020-12-31 | 2021-05-28 | 华工科技(广东)有限公司 | Intelligent frequency-shift water treatment control system and control method thereof |
| CN112865559B (en) * | 2020-12-31 | 2022-07-05 | 华工科技(广东)有限公司 | Intelligent frequency-shift water treatment control system and control method thereof |
| CN113037055A (en) * | 2021-02-05 | 2021-06-25 | 散裂中子源科学中心 | Long pulse solid-state modulator based on high-frequency transformer |
| CN113162254A (en) * | 2021-04-16 | 2021-07-23 | 中国矿业大学 | Multi-stage pulse switching voltage stabilizing circuit and voltage stabilizing method |
| CN115313847A (en) * | 2022-08-24 | 2022-11-08 | 四川杰诺创科技有限公司 | High-voltage power supply of electromagnetic compatible millimeter wave transmitter and generation method thereof |
| CN115313847B (en) * | 2022-08-24 | 2024-01-30 | 四川杰诺创科技有限公司 | Electromagnetic compatible millimeter wave transmitter high-voltage power supply and generation method thereof |
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Application publication date: 20141126 |