CN102545578A - Single-phase half-bridge voltage-multiplying rectification PFC (power factor correction) circuit - Google Patents
Single-phase half-bridge voltage-multiplying rectification PFC (power factor correction) circuit Download PDFInfo
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Abstract
The invention discloses a single-phase half-bridge voltage-multiplying rectification PFC (power factor correction) circuit which comprises a power circuit, a detection circuit and a control circuit, wherein voltage and current signals of the power circuit are connected with the control circuit through the detection circuit; the power circuit comprises a booster circuit and a rectification circuit; two output ends of the booster circuit are connected with the midpoints of two bridge arms of the rectification circuit; an output end of the rectification circuit is used for outputting a direct current voltage; the detection circuit is used for detecting power voltage zero passage, inductive current and output voltage signals of the power circuit; and an input end of the control circuit is connected with an output end of the detection circuit, an output end of the control circuit is connected with a gate pole of a power switch of the power circuit. The single-phase half-bridge voltage-multiplying rectification PFC circuit can output stable direct voltage and generate a unit input power factor at the same time, can realize flexible voltage regulation capacity, can obtain linear input impedance, can obtain higher output voltage under lower input voltage and can reduce power consumption and voltage-withstand grade of power devices. The single-phase half-bridge voltage-multiplying rectification PFC circuit has the advantages of strong university, simple structure and low cost.
Description
Technical field
What the present invention relates to is a kind of AC-DC converter of electric and electronic technical field, specifically is a kind of single-phase semi-bridge voltage multiplying rectifier pfc circuit that can export multiplication of voltage.
Background technology
Along with the development of power electronic technology, increasing power electronic equipment inserts operation of power networks, and the mains by harmonics current problems is more and more serious.To the occurring principle of harmonic current and suppress a large amount of research, promoted the fast development of power factor correction (PFC) technology.Wherein single-phase active PFC technology is ripe gradually; It is higher that but traditional Single-phase PFC technology is fit to input voltage; Otherwise will cause the loss of volume and power device of boost inductance bigger, under this background, the present invention proposes a kind of single-phase semi-bridge voltage multiplying rectifier pfc circuit; Can when hanging down input ac voltage, accomplish unity power factor control and High Level DC Voltage output.
In order to accomplish the link of boosting, can adopt buck-boost type chopper circuit, C ú k chopper circuit, also can adopt the BOOST booster circuit.Advantages such as the BOOST circuit has simple in structure, and control is convenient are one of the preferred option that link takes of boosting.
In order to realize the rectification link, realize impedance conversion simultaneously, can adopt circuit of power factor correction.Traditional active PFC adjuster adopts uncontrollable rectifier bridge scheme, only adapts to the sufficiently high situation of input voltage, otherwise input voltage can increase the stress of power device when low, thus produce overheated with increase cost.
In sum; When low single phase alternating current (A.C.) voltage was imported, traditional single phase rectifier circuit required high to power device, and cost is higher; Can not be applied to the application scenario of low alternating voltage input-HVDC output, bigger limitation has appearred in traditional power factor control circuit.Along with the expansion of practical application, design a kind of simple in structure, complete function, high input power factor and the circuit can low-voltage alternating-current input-HVDC exported has been those skilled in the art's the task of top priority.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of prior art, proposed a kind of single-phase semi-bridge voltage multiplying rectifier pfc circuit, achieve low-voltage alternating-current-HVDC conversion, have linear impedance, simple in structure, control advantage easy and with low cost.
The present invention realizes through following technical scheme, the present invention includes: power circuit, testing circuit and control circuit, and wherein: the output of power circuit links to each other with the input of testing circuit, and the output of testing circuit links to each other with the input of control circuit.
Described power circuit comprises: the booster circuit of cascade and rectification circuit successively.
Described booster circuit is a BOOST type booster circuit; Structure is boost inductance, inspection leakage resistance and one group of bidirectional switch; Be connected in parallel between the live wire and zero line of AC power; One end of boost inductance links to each other with the AC power live wire; An end of bidirectional switch and an input of rectification circuit link to each other in the other end and the booster circuit, and the other end of bidirectional switch links to each other with another input of rectification circuit with an end of inspection leakage resistance in the booster circuit, and the other end of examining leakage resistance links to each other with the AC power zero line;
The structure of described rectification circuit is two diodes, two electric capacity and two bridge rectifiers that resistance constitutes; Be called diode brachium pontis and electric capacity brachium pontis respectively; First diode and second diode are in sequential series; Constitute the diode brachium pontis, this brachium pontis mid point links to each other as the common port of boost inductance in an input and the booster circuit and bidirectional switch.First electric capacity and second electric capacity are in sequential series, constitute the electric capacity brachium pontis, and this brachium pontis mid point links to each other with the common port of the elementary winding of current transformer in the galvanometer circuit as bidirectional switch in another input and the booster circuit.The positive pole of the negative electrode of first diode and first electric capacity and an end of first resistance positive pole of back that link to each other as direct current output; The negative electrode of the anode of second diode and second electric capacity and an end of second resistance link to each other the back as the negative pole of direct current output, and the other end of first resistance links to each other with an end of second resistance and afterwards links to each other with the mid point of electric capacity brachium pontis;
Two outputs of described BOOST type booster circuit link to each other the output output dc voltage of rectification circuit with the mid point of two brachium pontis of bridge rectifier respectively.
Described testing circuit is the zero-detection circuit of the input voltage of three individualisms, the galvanometer circuit of power circuit and the inspection volt circuit of output voltage.Two inputs of zero-detection circuit connect two outputs of AC power respectively; The input of two current transformers of galvanometer circuit is connected on and exchanges on the zero line, and two inputs of inspection volt circuit connect the cathode output end of rectifier bridge and the mid point of electric capacity brachium pontis respectively.
Described control circuit comprises pfc controller.The input of pfc controller links to each other with four outputs of testing circuit, and output links to each other with the control end of bidirectional switch.
Single-phase semi-bridge voltage multiplying rectifier pfc circuit of the present invention: zero-detection circuit is responsible for detecting net and is pressed zero crossing, presses zero passage information, the synchronizing signal that the auxiliary judgment net is pressed for control circuit provides net; Galvanometer circuit is responsible for detecting the electric current of boost inductance, is used for the current closed-loop control of control circuit PFC control algolithm; The inspection volt circuit can obtain exporting the voltage of total voltage and electric capacity brachium pontis underarm, through subtracting each other the voltage that can also obtain electric capacity brachium pontis upper arm, is used for the voltage close loop control of control circuit PFC control algolithm.Control circuit just can adopt various PFC control algolithms to go to realize the control of PFC at the above-mentioned zero passage of acquisition, electric current and information of voltage; The final PWM driving pulse that produces; The two-way power switch of booster circuit in the driving power circuit; Make it according to the certain rule break-make, realize the basic function of PFC, be i.e. regulated output voltage and acquisition unit input power factor.
The present invention can be under the situation of low input ac voltage according to voltage doubling rectifing circuit; Acquisition is under the principle of two times of general Output Voltage in Rectified Circuits; Formulated the voltage multiplying rectifier pfc circuit; Can realize flexibly, pressure regulation ability and obtain linear input impedance reliably, overcome low excessively the harsh requirement that causes of input voltage to boost inductance, power device, be fit to the various application scenarios that low-voltage alternating-current input-HVDC is exported.The power circuit simplicity of design, control is convenient, has important use and is worth.Voltage multiplying rectifier pfc circuit of the present invention has characteristics such as project organization novelty, highly versatile, has simple in structure, low cost and other advantages simultaneously.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention 1.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment is that prerequisite is carried out with technical scheme 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 provides a kind of single-phase semi-bridge voltage multiplying rectifier pfc circuit; Comprise power circuit, testing circuit and control circuit 6, the output of power circuit is a direct voltage, and the input of testing circuit links to each other with the voltage of power circuit, current signal; The output of testing circuit links to each other with the input of control circuit, and the output of control circuit links to each other with the gate pole of power switch in the power circuit.
Described power circuit comprises: the booster circuit 1 of cascade successively, rectification circuit 2.The output of booster circuit links to each other with the mid point of two brachium pontis of rectification circuit, the output DCP of rectification circuit and DCN output dc voltage.
Described booster circuit 1 is a BOOST type booster circuit; Comprise inductance L 1, bidirectional switch S1 and inspection leakage resistance R19; The end of boost inductance L1 links to each other with AC power live wire ACL; The other end links to each other with the end of bidirectional switch S1 and an input of rectification circuit 2, and the other end of bidirectional switch S1 links to each other with the end of inspection leakage resistance R19 and another input of rectification circuit 2, and the other end of inspection leakage resistance R19 links to each other with the AC power zero line;
Described inductance L 1 is an amorphous material, and the sense value is 1mH.
Described bidirectional switch is to be composed in series against leading the switch common emitter by two, and the gate pole of this bidirectional switch is accepted the pwm pulse control signal.
Described is IGBT 600V/50A/100 ℃ against leading switch, and common emitter is adjustable according to the closed-loop control result against the PWM driving pulse of leading switch, and switching frequency is 20kHz.
Described rectification circuit 2 is by two diodes, two electric capacity and two rectification circuits that resistance is formed; The first diode D1 and the second diode D2 are in sequential series; Constitute the diode brachium pontis, this brachium pontis mid point links to each other as the common port of boost inductance L1 in an input and the booster circuit 1 and bidirectional switch S1.The first electric capacity E1 and the second electric capacity E2 are in sequential series, constitute the electric capacity brachium pontis, and this brachium pontis mid point links to each other as the common port of the elementary winding of current transformer M1 in the galvanometer circuit 4 of bidirectional switch S1 in another input and the booster circuit 1 and testing circuit.The positive pole of the negative electrode of the first diode D1 and the first electric capacity E1 and an end of the first resistance R 1 anodal DCP of back that link to each other as direct current output; The negative electrode of the anode of the second diode D2 and the second electric capacity E2 and an end of second resistance R 2 link to each other the back as the negative pole DCN of direct current output, and the other end of first resistance R 1 links to each other with an end of second resistance R 2 and afterwards links to each other with the mid point of electric capacity brachium pontis;
Described diode D1, D2 are reverse fast recovery diode, and its reverse withstand voltage is 600V/35A/100 ℃.
Described electrochemical capacitor E1, E2 are that alminium electrolytic condenser is respectively 3300 μ F/330V.
Described first and second resistance R 1, R2 are conventional, electric-resistance, and resistance is 50k Ω/2W.
Described testing circuit comprises self-existent zero-detection circuit 3, galvanometer circuit 4, inspection volt circuit 5.
Described zero-detection circuit 3 comprises six resistance, four diodes, an electric capacity and an operational amplifier, and its output is the CAP signal.
Described the 3rd resistance R 3, the 4th resistance R 4, the 6th resistance R 6, the 7th resistance R 7 are common plug-in unit resistance, and resistance is 200k Ω.
Described the 5th resistance R 5, the 8th resistance R 8 are conventional, electric-resistance, and resistance is 1k Ω.
Described the 3rd to the 6th diode D3, D4, D5, D6 are general-purpose diode, reverse withstand voltage 800V.
Described capacitor C 1 is common electric capacity, 0.1 μ F/63V.
Described operational amplifier A 1 is common amplifier, like TLC2272.
Described galvanometer circuit 4 comprises six resistance, a diode, three electric capacity, a current transformer, an operational amplifier, and its output is an input of control circuit.
Described the 9th to the 13 resistance R 9, R10, R11, R12, R13 are conventional, electric-resistance, and resistance is 10k Ω.
Described the 14 resistance R 14 is a conventional, electric-resistance, and resistance is 1k Ω.
Described the 7th diode D7 is a general-purpose diode, and reverse withstand voltage is 700V.
Described second to the 4th capacitor C 2, C3, C4 are common electric capacity, 0.1 μ F/63V.
Described current transformer M1 is a current transformer, and the turn ratio is 200: 1.
Described operational amplifier is common amplifier, like TLC2272.
Described inspection volt circuit 5 comprises eight resistance, four electric capacity, and its output is two inputs of control circuit.
Described the 15 resistance R the 15, the 16 resistance R the 16, the 19 resistance R the 19, the 20 resistance R 20 is common plug-in unit resistance, and resistance is 200k Ω.
Described the 17 resistance R the 17, the 18 resistance R the 18, the 21 resistance R the 21, the 22 resistance R 22 is a conventional, electric-resistance, and resistance is 1k Ω.
Described the 5th to the 8th capacitor C 5, C6, C7, C8 are common electric capacity, 0.1 μ F/63V.
The input of described control circuit 6 is to link to each other with the output of testing circuit, and output links to each other with contrary control end of leading switch.
In the present embodiment, specified input ac voltage is 110V, and output dc voltage is 380V, and rated output power is 2.2kW, and all components and parts all adopt high accuracy.
Present embodiment can be realized high voltage input and bigger power output.
Present embodiment is worked in the following manner:
Zero-detection circuit 3 inputs link to each other with power supply terminal respectively, and both ends of power voltage carries out dividing potential drop with the 5th resistance and the 8th resistance respectively through the 3rd resistance, the 4th resistance and the 6th resistance, the 7th resistance respectively, the 5th resistance and the 8th resistance common end grounding; Obtain less sinusoidal voltage; First filter capacitor takes out this voltage signal from the 5th resistance and the 8th resistance, is applied on the 3rd diode and the 4th diode of one group of reverse parallel connection, then can obtain to be no more than for amplitude the alternating voltage of diode forward pressure drop; This voltage direction is along with the power supply zero passage changes; Then the voltage of two inputs of first operational amplifier is the conducting voltage of diode, and is positive and negative consistent with the first filter capacitor voltage direction, when supply voltage when zero crossing changes; The first operational amplifier output voltage direction changes, and accomplishes the purpose of zero-detection.The 5th diode and the 6th diode constitute protective circuit, make the zero-detection circuit output voltage be in the safe range.
The input of inspection volt circuit 5 links to each other with power circuit electric capacity brachium pontis, cathode output end, constitutes two on all four circuit of structure.The 15 resistance, the 16 resistance and the 17 resistance constitute bleeder circuit, detect the voltage of brachium pontis under the electric capacity brachium pontis, are input to the second sampling input of control circuit.The 19 resistance, the 20 resistance and the 21 resistance constitute bleeder circuit, detect the rectification circuit anode output end voltage, are input to the 3rd sampling input of control circuit.The 5th filter capacitor, the 6th filter capacitor, the 7th filter capacitor and the 8th filter capacitor have the effect of filtering output voltage medium-high frequency component.
Voltage signal, the current signal of 6 pairs of detections of control circuit carry out closed-loop control; Through adopting classical PFC control algolithm or other PFC control algolithm; Produce the high-frequency PWM pulse control signal; Bidirectional switch through booster circuit in the PWM port controlling power circuit is opened and is turn-offed, and finally makes rectification circuit output galvanic current press, and makes the net side present the unity power factor characteristic simultaneously.At the positive half cycle of power supply, during the bidirectional switch conducting, power supply fills ability to boost inductance, and first electrochemical capacitor, second electrochemical capacitor release energy to load; When bidirectional switch turn-offed, power supply, inductance and second electrochemical capacitor released energy, and first electrochemical capacitor is charged, and to load power output is provided, and wherein second electrolysis releases energy slower.At the power-half cycle, during the bidirectional switch conducting, power supply charges to boost inductance, and first electrochemical capacitor, second electrochemical capacitor release energy to load; When bidirectional switch turn-offed, power supply, inductance and first electrochemical capacitor released energy, and second electrochemical capacitor is charged, and to load energy is provided.First resistance and second resistance are energy consumption resistance, play all pressure effects.Rationally control the make-and-break time of bidirectional switch through control system, function that can PFC.
Single-phase semi-bridge voltage multiplying rectifier pfc circuit of the present invention: zero-detection circuit is responsible for detecting net and is pressed zero crossing, presses zero passage information, the synchronizing signal that the auxiliary judgment net is pressed for control circuit provides net; Galvanometer circuit is responsible for detecting the electric current of boost inductance L1, is used for the current closed-loop control of control circuit PFC control algolithm; The inspection volt circuit can obtain exporting the voltage of total voltage and electric capacity brachium pontis underarm, through subtracting each other the voltage that can also obtain electric capacity brachium pontis upper arm, is used for the voltage close loop control of control circuit PFC control algolithm.Control circuit just can adopt various PFC control algolithms to go to realize the control of PFC at the above-mentioned zero passage of acquisition, electric current and information of voltage; The final PWM driving pulse that produces; The two-way power switch of booster circuit in the driving power circuit; Make it according to the certain rule break-make, realize the basic function of PFC, be i.e. regulated output voltage and acquisition unit input power factor.Above-mentioned testing circuit is fit to carry out voltage multiplying rectifier by the bridge rectifier that two diodes and two electric capacity constitute very much, is fit to low AC-input voltage situation.Simultaneously entire circuit is very simple, directly detects electric weight and controlled electric weight is less, and design of Controller is also also uncomplicated, has obtained simulation analysis and experiment preliminary identification.And the common deficiency of existing several kinds of schemes: be not suitable for low alternating voltage input, the stress and the loss power of power device are bigger, and cost is higher.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (5)
1. single-phase semi-bridge voltage multiplying rectifier pfc circuit; Comprise power circuit, testing circuit and control circuit; Wherein: the power circuit output links to each other with the testing circuit input, and the testing circuit output links to each other with the control circuit input, and the zero passage of power circuit, voltage, current signal reach control circuit through testing circuit; It is characterized in that: described power circuit comprises: the booster circuit of cascade and rectification circuit successively, and described booster circuit is a BOOST type booster circuit;
Described rectification circuit is by two diodes, two electric capacity and two bridge rectifiers that resistance constitutes; Be called diode brachium pontis and electric capacity brachium pontis respectively; First diode and second diode are in sequential series; Constitute the diode brachium pontis, this brachium pontis mid point links to each other as the common port of boost inductance in an input and the booster circuit and bidirectional switch; First electric capacity and second electric capacity are in sequential series, constitute the electric capacity brachium pontis, and this brachium pontis mid point links to each other with the common port of the elementary winding of current transformer in the galvanometer circuit as bidirectional switch in another input and the booster circuit; The positive pole of the negative electrode of first diode and first electric capacity and an end of first resistance positive pole of back that link to each other as direct current output; The negative electrode of the anode of second diode and second electric capacity and an end of second resistance link to each other the back as the negative pole of direct current output, and the other end of first resistance links to each other with an end of second resistance and afterwards links to each other with the mid point of electric capacity brachium pontis;
Two outputs of described BOOST type booster circuit link to each other the output output dc voltage of rectification circuit with the mid point of two brachium pontis of bridge rectifier respectively.
2. single-phase semi-bridge voltage multiplying rectifier pfc circuit according to claim 1; It is characterized in that; Described BOOST type booster circuit is connected in parallel between the live wire and zero line of AC power; Comprise boost inductance, inspection leakage resistance and one group of bidirectional switch, wherein an end of boost inductance links to each other with the AC power live wire, and the other end links to each other with an end of bidirectional switch and an input of rectification circuit; The other end of bidirectional switch links to each other with an end of inspection leakage resistance and another input of rectification circuit, and the other end of inspection leakage resistance links to each other with the AC power zero line.
3. single-phase semi-bridge voltage multiplying rectifier pfc circuit according to claim 1; It is characterized in that; Described testing circuit is the zero-detection circuit of the input voltage of three individualisms, the galvanometer circuit of power circuit and the inspection volt circuit of output voltage; Two inputs of zero-detection circuit connect two outputs of AC power respectively; The input of two current transformers of galvanometer circuit is connected on and exchanges on the zero line, and two inputs of inspection volt circuit connect the cathode output end of rectifier bridge and the mid point of electric capacity brachium pontis respectively.
4. single-phase semi-bridge voltage multiplying rectifier pfc circuit according to claim 1 is characterized in that described control circuit comprises pfc controller, and the input of pfc controller links to each other with four outputs of testing circuit, and output links to each other with the control end of bidirectional switch.
5. according to each described single-phase semi-bridge voltage multiplying rectifier pfc circuit of claim 1-4, it is characterized in that said zero-detection circuit is responsible for detecting net and is pressed zero crossing, press zero passage information, the synchronizing signal that the auxiliary judgment net is pressed for control circuit provides net; Galvanometer circuit is responsible for detecting the electric current of boost inductance, is used for the current closed-loop control of control circuit PFC control algolithm; The inspection volt circuit obtains exporting the voltage of total voltage and electric capacity brachium pontis underarm, through subtracting each other the voltage that also obtains capacitance bridge arm upper arm, is used for the voltage close loop control of control circuit PFC control algolithm; Control circuit adopts the PFC control algolithm to go to realize the control of PFC after obtaining above-mentioned zero passage, electric current and information of voltage, finally produces the PWM driving pulse, the two-way power switch of booster circuit in the driving power circuit.
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| CN201110442460.6A CN102545578B (en) | 2011-12-26 | 2011-12-26 | Single-phase half-bridge voltage-multiplying rectification PFC (power factor correction) circuit |
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| CN201110442460.6A CN102545578B (en) | 2011-12-26 | 2011-12-26 | Single-phase half-bridge voltage-multiplying rectification PFC (power factor correction) circuit |
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| CN105337515A (en) * | 2015-11-01 | 2016-02-17 | 华南理工大学 | High-efficiency double-Boost PFC converter |
| CN105429447A (en) * | 2015-12-21 | 2016-03-23 | 华南理工大学 | Common-mode rejection dual-Boost voltage-multiplying PFC converter |
| CN107994764A (en) * | 2016-10-26 | 2018-05-04 | 上海儒竞自动控制***有限公司 | Single phase power factor correcting circuit |
| CN109683014A (en) * | 2019-02-22 | 2019-04-26 | 山东欧德利电气设备有限公司 | A kind of instrument current detection circuit that can directly detect direct current and exchange |
| CN111525821A (en) * | 2020-06-02 | 2020-08-11 | 哈尔滨工业大学（威海） | Novel PFC rectifier circuit |
| CN113541331A (en) * | 2021-07-21 | 2021-10-22 | 成都市易冲半导体有限公司 | Self-adaptive low-voltage starting circuit and method for low-inductance wireless charging system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105337515A (en) * | 2015-11-01 | 2016-02-17 | 华南理工大学 | High-efficiency double-Boost PFC converter |
| CN105429447A (en) * | 2015-12-21 | 2016-03-23 | 华南理工大学 | Common-mode rejection dual-Boost voltage-multiplying PFC converter |
| CN107994764A (en) * | 2016-10-26 | 2018-05-04 | 上海儒竞自动控制***有限公司 | Single phase power factor correcting circuit |
| CN109683014A (en) * | 2019-02-22 | 2019-04-26 | 山东欧德利电气设备有限公司 | A kind of instrument current detection circuit that can directly detect direct current and exchange |
| CN111525821A (en) * | 2020-06-02 | 2020-08-11 | 哈尔滨工业大学（威海） | Novel PFC rectifier circuit |
| CN113541331A (en) * | 2021-07-21 | 2021-10-22 | 成都市易冲半导体有限公司 | Self-adaptive low-voltage starting circuit and method for low-inductance wireless charging system |
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| CN102545578B (en) | 2014-10-15 |
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