CN102097929A - Single-level power factor corrector controlled by complete open loop - Google Patents
Single-level power factor corrector controlled by complete open loop Download PDFInfo
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- CN102097929A CN102097929A CN2011100652622A CN201110065262A CN102097929A CN 102097929 A CN102097929 A CN 102097929A CN 2011100652622 A CN2011100652622 A CN 2011100652622A CN 201110065262 A CN201110065262 A CN 201110065262A CN 102097929 A CN102097929 A CN 102097929A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a single-level power factor corrector controlled by a complete open loop, relating to the technical field of power electronics. The single-level power factor corrector comprises a rectifier circuit, a booster circuit, a voltage polarity detection circuit, an output detection circuit and a control unit, wherein the rectifier circuit, the booster circuit and the output detection circuit are sequentially cascaded; the voltage polarity detection circuit, the booster circuit and the output detection circuit are respectively connected with the control unit. The single-level power factor corrector can be used for achieving alternating current-direct current conversion of unit input power factors; the circuit is flexibly designed, the control algorithm is simple and the cost is low; the single-level power factor corrector can be suitable for random change of the load; and no matter in heavy load or light load, the single-level power factor corrector can obtain higher power factors.
Description
Technical field
What the present invention relates to is a kind of power factor corrector of electric and electronic technical field, specifically is a kind of single-level power factor correction device of complete open loop control.
Background technology
Along with the extensive application of nonlinear load, the harmonic pollution in the electrical network increases the weight of day by day, and the range of application of power factor corrector is also more and more wider.Traditional power factor correction device control algolithm need detect a large amount of circuit informations, comprising: inductive current, input ac voltage, input direct voltage and output dc voltage.And too much transducer and testing circuit have also reduced the reliability of system when having increased circuit complexity.Though sensorless control algorithm can reduce number of sensors to a certain extent, improve system reliability, it needs the detected circuit information of basis to estimate the circuit information that does not detect, control algolithm complexity.Therefore, the research of the power factor corrector of open loop has become a new problem.The main target of pursuing is for simplifying circuit design, reduces testing circuit and number of sensors and can be implemented in load variations simultaneously when big, guarantor unit's power factor.
Find through retrieval prior art, Francisco J.Azcondo, Angel de Castro, F.Javier Diaz1, Oscar Garcia.Current Sensorless Power Factor Correction based on Digital Current Rebuilding (based on the no current transducer PFC control of digital current reconstruct); Wanfeng Zhang, Guang Feng, Yan-Fei Liu and Bin Wu.A Digital Power Factor Correction (PFC) Control Strategy Optimized for DSP (a kind of digital power factor correcting (PFC) control strategy), the prediction algorithm that has proposed a kind of tape input electric voltage feed forward compensation comes the work of power controlling factor correcting device; Tokuo Ohnishi and Masahide Hojo.DC Voltage Sensorless Single-Phase PFC Converter (need not the Single-phase PFC converter of direct voltage transducer) proposes a kind of and needs to detect the power factor corrector control method that AC-input voltage need not detect VD, a certain dead load is suitable for, can not real-time regulated.
More than comprehensive, single-stage not being had the retrieval of sensor power factor correcting device prior art finds, adopting complicated control algolithm to reduce number of sensors is difficult for realizing, and generally be to be under the load-carrying situation of power factor corrector institute in known power output, design realizes control algolithm, the fluctuation of load situation that can't tackle in the practical application to be occurred.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of single-level power factor correction device of complete open loop control is provided, make the AC-DC conversion that it can the unit's of realization input power factor, the flexible design of circuit, control algolithm is simple, and cost is low, and can adapt to the change at random of load, no matter when heavy duty or underloading, can both obtain higher power factor.
The present invention is achieved by the following technical solutions, the present invention includes: rectification circuit, booster circuit, polarity of voltage testing circuit, output detection circuit and control unit, wherein: the cascade successively of rectification circuit, booster circuit and output detection circuit, polarity of voltage testing circuit, booster circuit and output detection circuit are connected with control unit respectively.
Described rectification circuit is made up of the rectifier bridge of two parallel connections.
Described booster circuit comprises: boost converter and electrochemical capacitor, and wherein: boost converter is in parallel with electrochemical capacitor respectively, electrochemical capacitor ground connection, boost converter is connected with control unit.
Described boost converter comprises: boost inductance, diode and insulated gate bipolar transistor, wherein: the grid of insulated gate bipolar transistor is connected with control unit, the collector electrode of insulated gate bipolar transistor is connected the grounded emitter of insulated gate bipolar transistor with the anode of diode and an end of boost inductance respectively.
Described output detection circuit comprises: two filter amplification circuit, voltage sampling circuit and the current sampling circuit realized by resistance, wherein: voltage sampling circuit is in parallel with the boost converter of booster circuit, voltage sampling circuit is connected the back cross-over connection in the output of output detection circuit with current sampling circuit, voltage sampling circuit, current sampling circuit are connected with control unit by first, second filter amplification circuit respectively.
Described control unit comprises: digital signal processing unit and insulated gate bipolar transistor driver, wherein: the insulated gate bipolar transistor driver is connected with the boost converter of digital signal processing unit and booster circuit respectively.
Described polarity of voltage testing circuit comprises: difference channel, RC filter circuit and two bleeder circuits by the resistance realization, wherein: the normal phase input end of the operational amplifier of difference channel is by first resistance of first bleeder circuit, second resistance inserts input ACN end, this positive input is by the 3rd grounding through resistance of first bleeder circuit, the inverting input of the operational amplifier of difference channel is by the 8th resistance of second bleeder circuit, the 9th resistance inserts input ACL end, this reverse input end is by the tenth grounding through resistance of second bleeder circuit, and the RC filter circuit is connected with control unit with the output of difference channel respectively.
Described difference channel comprises: operational amplifier, two diodes and electric capacity, wherein: electric capacity is arranged at the input of difference channel, electric capacity is parallel to the input of operational amplifier, and first, second diode is parallel to the input of operational amplifier with opposite polarity.
The present invention carries out work in the following manner: rectification circuit is to the input AC current commutates and the half-sinusoid direct voltage is provided, booster circuit is connected to the electrochemical capacitor two ends after copped wave is boosted to input half-sinusoid direct voltage can export constant DC voltage, the polarity of voltage testing circuit detects the positive-negative polarity of AC-input voltage, output detection circuit detects output voltage and current signal, load information is provided, insulated gate bipolar transistor is opened PWM (Pulse Width Modulation, the pulse width modulation) signal of shutoff in the control unit generation control booster circuit.
The present invention is according to open loop control and power factor correction principle, utilize less transducer and testing circuit that circuit of power factor correction is carried out open loop control, therefore the design of circuit simple and flexible more, control algolithm is simple, cost reduces, and efficient is promoted, and can adapt to the change at random of load, no matter heavy duty or underloading can both obtain higher power factor.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, present embodiment comprises: rectification circuit 1, booster circuit 2, polarity of voltage testing circuit 3, output detection circuit 4 and control unit 5, wherein: rectification circuit 1, booster circuit 2 and output detection circuit 4 cascade successively, booster circuit 2, polarity of voltage testing circuit 3 and output detection circuit 4 are connected with control unit respectively.
Described rectification circuit 1 is made up of the first rectifier bridge B1, the second rectifier bridge B2 of parallel connection.
Described booster circuit 2 comprises: boost converter and electrochemical capacitor E1, and wherein: boost converter is in parallel with electrochemical capacitor E1 respectively, electrochemical capacitor E1 ground connection, boost converter is connected with control unit 5.
Described boost converter comprises: boost inductance L1, diode D1 and insulated gate bipolar transistor S1, wherein: the grid of insulated gate bipolar transistor S1 is connected with control unit 5, the collector electrode of insulated gate bipolar transistor S1 is connected the grounded emitter of insulated gate bipolar transistor S1 with the anode of diode D1 and the end of boost inductance L1 respectively.
Described output detection circuit 4 comprises: first filter amplification circuit, second filter amplification circuit, by the 4th resistance R 4, voltage sampling circuit that the 5th resistance R 5 and the 6th resistance R 6 are formed and the current sampling circuit that constitutes by the 7th resistance R 7, wherein: the 4th resistance R 4 of voltage sampling circuit, the 5th resistance R 5 and the 6th resistance R 6 series connection backs are in parallel with the boost converter of booster circuit, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6 and the 7 series connection back cross-over connections of the 7th resistance R are in the output of output detection circuit, the voltage at the 6th resistance R of sampling 6 two ends is connected with control unit 5 by first filter amplification circuit, and the electric current that sample streams is crossed the 7th resistance R 7 is connected with control unit 5 by second filter amplification circuit.
Described control unit 5 comprises: digital signal processing unit and insulated gate bipolar transistor driver DR1, wherein: insulated gate bipolar transistor driver DR1 is connected with the boost converter of digital signal processing unit with booster circuit 2 respectively.
Described polarity of voltage testing circuit 4 comprises: difference channel, the RC filter circuit, by first resistance R 1, first bleeder circuit that second resistance R 2 and the 3rd resistance R 3 are formed and by the 8th resistance R 8, second bleeder circuit that the 9th resistance R 9 and the tenth resistance R 10 are formed, wherein: the positive input of the operational amplifier of difference channel is by first resistance R 1 of first bleeder circuit, second resistance R 2 inserts input ACN end, this positive input is by the 3rd resistance R 3 ground connection of first bleeder circuit, the reverse input end of the operational amplifier of difference channel is by the 8th resistance R 8 of second bleeder circuit, the 9th resistance R 9 inserts input ACL end, this reverse input end is by the tenth resistance R 10 ground connection of second bleeder circuit, and the RC filter circuit is connected with control unit 5 with the output of difference channel respectively.
Described difference channel comprises: operational amplifier U1, the first diode D2, the second diode D3 and capacitor C 3, wherein: capacitor C 3 is arranged at the input of difference channel, capacitor C 3 is parallel to the input of operational amplifier, and the first diode D2, the second diode D3 are parallel to the input of operational amplifier U1 with opposite polarity.
1 pair of input AC electricity of described rectification circuit carries out rectification, obtains direct current output, can reduce the electric stress of each rectification circuit by first rectifier bridge in parallel and second rectifier bridge.
Described booster circuit 2 be input as half-sinusoid voltage, the equivalent load of its input can accomplish that to resistive promptly the unit input power factor can make this boosting inverter output stable DC voltage simultaneously.
The positive-negative polarity that described polarity of voltage testing circuit 3 detects AC-input voltage uses for control unit.
Described output detection circuit 4 detects output voltage and output current, calculates load state in real time for controller, changes Control Parameter, thereby the wide region of realizing load is regulated.
The Digital Signal Processing of described control unit 5 is according to the circuit state signal that detects, calculate the output pwm pulse signal, through conducting and the shutoff of the insulated gate bipolar transistor S1 of driver rear drive booster circuit 2, make booster circuit 2 realize unit input power factors and dc constant voltage output.
Rectification circuit 1 described in this example, booster circuit 2, polarity of voltage testing circuit 3, the single-level power factor correction device of the complete open loop control that output detection circuit 4 and control unit 5 are formed, it has mainly acted on 2 points: one, make input current waveform follow the tracks of input voltage waveform preferably, realize the unit input power factor, two, prime pressurizer as circuit, the output galvanic current is pressed, adopt complete open loop control can simplify circuit design, control algolithm reduces cost, and can adapt to the change at random of load, no matter when heavy duty or underloading, can both obtain higher power factor.
Claims (8)
1. the single-level power factor correction device of a complete open loop control, comprise: rectification circuit, booster circuit, polarity of voltage testing circuit, output detection circuit and control unit, it is characterized in that, wherein: the cascade successively of rectification circuit, booster circuit and output detection circuit, polarity of voltage testing circuit, booster circuit and output detection circuit are connected with control unit respectively.
2. the single-level power factor correction device of complete open loop control according to claim 1 is characterized in that described rectification circuit is made up of the rectifier bridge of two parallel connections.
3. the single-level power factor correction device of complete open loop control according to claim 1, it is characterized in that described booster circuit comprises: boost converter and electrochemical capacitor, wherein: boost converter is in parallel with electrochemical capacitor respectively, electrochemical capacitor ground connection, boost converter is connected with control unit.
4. the single-level power factor correction device of complete open loop control according to claim 4, it is characterized in that, described boost converter comprises: boost inductance, diode and insulated gate bipolar transistor, wherein: the grid of insulated gate bipolar transistor is connected with control unit, the collector electrode of insulated gate bipolar transistor is connected the grounded emitter of insulated gate bipolar transistor with the anode of diode and an end of boost inductance respectively.
5. the single-level power factor correction device of complete open loop control according to claim 1, it is characterized in that, described output detection circuit comprises: two filter amplification circuit, voltage sampling circuit and the current sampling circuit realized by resistance, wherein: voltage sampling circuit is in parallel with the boost converter of booster circuit, voltage sampling circuit is connected the back cross-over connection in the output of output detection circuit with current sampling circuit, voltage sampling circuit, current sampling circuit are connected with control unit by first, second filter amplification circuit respectively.
6. the single-level power factor correction device of complete open loop control according to claim 1, it is characterized in that, described control unit comprises: digital signal processing unit and insulated gate bipolar transistor driver, wherein: the insulated gate bipolar transistor driver is connected with the boost converter of digital signal processing unit and booster circuit respectively.
7. the single-level power factor correction device of complete open loop control according to claim 1, it is characterized in that, described polarity of voltage testing circuit comprises: difference channel, RC filter circuit and two bleeder circuits by the resistance realization, wherein: the positive input of the operational amplifier of difference channel is by first resistance of first bleeder circuit, second resistance inserts input ACN end, this positive input is by the 3rd grounding through resistance of first bleeder circuit, the reverse input end of the operational amplifier of difference channel is by the 8th resistance of second bleeder circuit, the 9th resistance inserts input ACL end, this reverse input end is by the tenth grounding through resistance of second bleeder circuit, and the RC filter circuit is connected with control unit with the output of difference channel respectively.
8. the single-level power factor correction device of complete open loop control according to claim 7, it is characterized in that, described difference channel comprises: operational amplifier, two diodes and electric capacity, wherein: electric capacity is arranged at the input of difference channel, electric capacity is parallel to the input of operational amplifier, and first, second diode is parallel to the input of operational amplifier with opposite polarity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100652622A CN102097929A (en) | 2011-03-18 | 2011-03-18 | Single-level power factor corrector controlled by complete open loop |
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| CN2011100652622A CN102097929A (en) | 2011-03-18 | 2011-03-18 | Single-level power factor corrector controlled by complete open loop |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219894A (en) * | 2013-05-06 | 2013-07-24 | 西安电子科技大学 | Ultra-low-voltage boosting system and control method thereof |
| CN104780664A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | Logic protection voltage-stabilization type frequency conversion and energy saving control system for smart grid |
| CN107086769A (en) * | 2017-03-17 | 2017-08-22 | 深圳市中电华星电子技术有限公司 | One kind matches somebody with somebody the low apparent power digital circuit of network source |
| CN107437899A (en) * | 2017-09-13 | 2017-12-05 | 上海交通大学 | The sinusoidal single-phase AC DC translation circuits of net stream |
| CN107612387A (en) * | 2017-09-13 | 2018-01-19 | 上海交通大学 | The single-phase AC DC translation circuits of net stream pure sinusoid driving pulse modulating frequency and width |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201260129Y (en) * | 2008-08-29 | 2009-06-17 | 广东志高空调有限公司 | Power factor corrector |
| CN201726311U (en) * | 2010-08-11 | 2011-01-26 | 上海交通大学 | Half-controlled bridge arm power MOSFET power factor corrector |
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2011
- 2011-03-18 CN CN2011100652622A patent/CN102097929A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201260129Y (en) * | 2008-08-29 | 2009-06-17 | 广东志高空调有限公司 | Power factor corrector |
| CN201726311U (en) * | 2010-08-11 | 2011-01-26 | 上海交通大学 | Half-controlled bridge arm power MOSFET power factor corrector |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219894A (en) * | 2013-05-06 | 2013-07-24 | 西安电子科技大学 | Ultra-low-voltage boosting system and control method thereof |
| CN103219894B (en) * | 2013-05-06 | 2015-06-10 | 西安电子科技大学 | Ultra-low-voltage boosting system and control method thereof |
| CN104780664A (en) * | 2015-03-30 | 2015-07-15 | 成都颉隆科技有限公司 | Logic protection voltage-stabilization type frequency conversion and energy saving control system for smart grid |
| CN104780664B (en) * | 2015-03-30 | 2017-03-08 | 广州禺华电气设备有限公司 | A kind of virtual protection type voltage regulation intelligent grid energy saving control system of frequency conversion in use |
| CN107086769A (en) * | 2017-03-17 | 2017-08-22 | 深圳市中电华星电子技术有限公司 | One kind matches somebody with somebody the low apparent power digital circuit of network source |
| CN107437899A (en) * | 2017-09-13 | 2017-12-05 | 上海交通大学 | The sinusoidal single-phase AC DC translation circuits of net stream |
| CN107612387A (en) * | 2017-09-13 | 2018-01-19 | 上海交通大学 | The single-phase AC DC translation circuits of net stream pure sinusoid driving pulse modulating frequency and width |
| CN107612387B (en) * | 2017-09-13 | 2019-12-27 | 上海交通大学 | Single-phase AC-DC conversion circuit with network flow pure sine drive pulse frequency modulation and width modulation |
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Application publication date: 20110615 |