CN202602533U - Power factor correction circuit, and integrated circuit and switch power supply for the manufacture of the power factor correction circuit - Google Patents
Power factor correction circuit, and integrated circuit and switch power supply for the manufacture of the power factor correction circuit Download PDFInfo
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- CN202602533U CN202602533U CN2012201426648U CN201220142664U CN202602533U CN 202602533 U CN202602533 U CN 202602533U CN 2012201426648 U CN2012201426648 U CN 2012201426648U CN 201220142664 U CN201220142664 U CN 201220142664U CN 202602533 U CN202602533 U CN 202602533U
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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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Abstract
The utility model discloses a power factor correction circuit, comprising a rectification circuit for rectification of the electrical network voltage. The output terminal of the rectification circuit is correspondingly connected to the input terminal of a boost circuit; the input terminal and/or the output terminal of the rectification circuit is connected to a filter circuit; the boost circuit achieves boost and power factor correction under the control of a control circuit; the control circuit possesses a feedback signal input terminal for controlling the switch tube in the boost circuit; a harmonic wave compensating circuit is used for transforming the voltage signal obtained after electrical network voltage rectification to a harmonic wave current signal and transmitting the harmonic wave current signal to the control circuit to reduce the harmonic wave distortion of the input current of the power factor correction circuit, and the power factor is raised. The power factor correction circuit is suitable for a switch type power supply circuit.
Description
Technical field
The utility model relates to electronic technology field, particularly a kind of circuit of power factor correction.
Background technology
Circuit of power factor correction is used for the power factor of correcting switch power supply.For example: the Switching Power Supply or the supply convertor that have circuit of power factor correction.
Existing circuit of power factor correction, as shown in Figure 1, comprise being connected level behind rectification circuit, the filter circuit
Booster circuit is realized boosting and power factor emendation function under the control of control circuit;
Control circuit is used for controlling the switching tube S10 of said booster circuit;
Wherein, rectification circuit generally adopts rectifier bridge B or full-wave rectification diode;
Wherein, booster circuit comprise the inductance L 10 and diode D10 of the output plus terminal that is serially connected in rectification circuit, and the anode of said diode D10 is connected with inductance L 10; The negative electrode of said diode D10 is the output plus terminal V of booster circuit
OO+; Said inductance L 10 is passed through the switching tube S10 drain-source utmost point, sampling resistor R with the common intersection of diode D10
S0Ground connection meets at the output negative terminal V of booster circuit
OO-;
Wherein, control circuit comprises first sample circuit, reference voltage signal Vr, operational amplifier U10, compensating network, second sample circuit, multiplier M10, voltage comparator U20, Drive and Control Circuit;
Said reference voltage signal Vr is for said operational amplifier U10 provides reference voltage;
Said first sample circuit is gathered output voltage signal from said booster circuit output, and is exported the first sampled signal V
F0Give the inverting input of operational amplifier U10, wherein, the inverting input of operational amplifier U10 is as the feedback signal input F0 of said control circuit; Its circuit connection structure is output plus terminal and the output series arm that is made up of divider resistance R10 and divider resistance R20 between the negative terminal that is connected in parallel on said booster circuit, and said resistance R 10 is connected the feedback signal input F0 of said control circuit with the common intersection of resistance R 20;
Said operational amplifier U10 is used for the said first sampled signal V
F0Compare and enlarge back output error signal V with reference voltage signal Vr
E0Its circuit connection structure is that the in-phase input end of operational amplifier U10 connects reference voltage signal Vr, inverting input connects the first sampled signal V
F0Be connected with compensating network between the output of said operational amplifier U10 and the inverting input, said compensating network can be the RC series circuit;
Second sample circuit, the output voltage that is used to gather said rectification circuit is as the second sampled signal V
S2
Multiplier is used for the said second sampled signal V
S2With said error signal V
E0Carry out the phase multiplication;
Said voltage comparator U20 goes to control said Drive and Control Circuit after the current sampling signal
of the switching tube S10 of the output signal of said multiplier M10 and said booster circuit compared; Its circuit connection structure is that the in-phase input end of voltage comparator U20 is connected with the output of said multiplier M10, inverting input connects switching tube S10 and the common intersection of gathering resistance R S1, and the voltage signal of said common intersection is the current sampling signal
of said switching tube S10
Said Drive and Control Circuit is used for the shutoff according to the switching tube S10 of the said booster circuit of output signal controlling of voltage comparator U20; Its circuit connection structure is that the output of Drive and Control Circuit is connected with the grid of the switching tube S10 of booster circuit;
Above-mentioned work principle of Power Factor Correction Circuit is: the first sampled signal V of the booster circuit output that first sample circuit is gathered
F0After comparing and enlarging with reference voltage reference signal Vr, output error signal V
E0Give multiplier M10, as first input signal of multiplier M10; Again second sample circuit is gathered the second sampled signal V of the output of rectification circuit
S2Give multiplier M10, as second input signal of multiplier M10; Multiplier M10 multiplies each other above-mentioned two input signals afterwards and the current sampling signal of switching tube S10
Remove the controlling and driving control circuit after comparing, when the current sampling signal of switching tube S10
During more than or equal to the output signal of multiplier M10, voltage comparator U20 exports control signal, and through drive control circuit switching tube S10 conducting.Because with the current ratio signal of switching tube S10 output signal from multiplier; And the output signal of multiplier is the product of first input signal and second input signal; Therefore, the current peak of switching tube S10 is followed the variation of first input signal, also promptly follows the output voltage signal of rectification circuit; Thereby make input current Iin follow the variation of input voltage vin, improve the power factor of circuit.As shown in Figure 2, the desired voltage waveform Vin of rectification circuit input end and ideal current waveform Iin, but in the circuit of power factor correction of reality; In order to realize electromagnetic compatibility; Generally when the input of rectification circuit and/or output were provided with filter circuit C10 and/or C20, the current waveform of rectification circuit input end will produce distortion near zero-crossing point, and its current waveform produces harmonic distortion; Thereby make the power factor step-down of circuit, as shown in Figure 3.
The utility model content
The utility model technical problem to be solved is, overcomes above deficiency, and a kind of circuit of power factor correction that can improve power factor and reduce harmonic distortion is provided.
In order to solve the problems of the technologies described above, the technical scheme of the utility model is: a kind of circuit of power factor correction comprises the rectification circuit that line voltage is carried out rectification, the corresponding connection with the input of booster circuit of the output of said rectification circuit; And connect filter circuit between the input of said rectification circuit and/or the output;
Said booster circuit is realized boosting and power factor emendation function under the control of control circuit;
Said control circuit is used for controlling the switching tube of said booster circuit;
The harmonic compensation circuit; Be used for converting the voltage signal after the line voltage rectification into the harmonic current signal; And said harmonic current signal injected to said control circuit, the total harmonic distortion with the input current that reduces said circuit of power factor correction improves power factor.
Further, said booster circuit comprises first inductance and first diode that are serially connected in level behind said rectification circuit and the filter circuit, and the common intersection of said first inductance and first diode is passed through the switching tube drain-source utmost point, sampling resistor ground connection.
Further, said control circuit comprises first sample circuit, reference voltage signal, operational amplifier, compensating network, second sample circuit, multiplier, voltage comparator, Drive and Control Circuit;
Said reference voltage signal is input to the normal phase input end of said operational amplifier;
Said first sample circuit, the output voltage of the said booster circuit of sampling, and export the first sampled signal V
FGive the inverting input of operational amplifier, wherein, the inverting input of operational amplifier is as the feedback signal input of said control circuit;
Said operational amplifier is used for said first sampled signal and reference voltage signal are compared the back output error signal;
Second sample circuit is used to the output voltage of said rectification circuit of sampling, and exports the second sampled signal V
S
Multiplier is used for said second sampled signal is carried out multiplication mutually with said error signal;
Said voltage comparator goes to control said Drive and Control Circuit after the current sampling signal of the switching tube of the output signal of said multiplier and said booster circuit compared;
Said Drive and Control Circuit is used for the shutoff according to the switching tube of the said booster circuit of output signal controlling of voltage comparator.
Further, said Drive and Control Circuit, also be used for detecting said booster circuit first inductive current zero passage constantly; When the zero passage that detects electric current constantly the time, output drive signal is used to control the conducting of the switching tube of booster circuit.
Further, said first sample circuit is to be connected in parallel on the output plus terminal of said booster circuit and first resistance and second resistance between the output negative terminal, and the common intersection of said first resistance and second resistance is the feedback signal input.
Further, be connected with compensating network between the output of said operational amplifier and its inverting input.
Further; Said harmonic compensation circuit; Be connected between the feedback signal input of said rectification circuit output plus terminal and said control circuit; Convert the output voltage of said rectification circuit into the harmonic current signal, and said harmonic current signal is injected in the said control circuit through the feedback signal input of said control circuit.
Further, said harmonic compensation circuit comprises the 3rd resistance and the 3rd electric capacity of series connection successively.
The utility model work principle of Power Factor Correction Circuit is: give operational amplifier after the harmonic current signal stack that first sampled signal of the booster circuit output of the first sample circuit collection and harmonic compensation circuit produce; Give multiplier after comparing and enlarging with the reference voltage reference signal of operational amplifier, as first input signal of multiplier; Second sampled signal of again second sample circuit being gathered the output of rectification circuit is given multiplier, as second input signal of multiplier; Current sampling signal with switching tube after multiplier multiplies each other above-mentioned two input signals compares; Come the control switch pipe through the controlling and driving control circuit; Make the current peak of switching tube follow the variation of input voltage; Thereby the input current that makes circuit of power factor correction is followed the variation of input voltage, improves power factor, reduces harmonic distortion.
Compared with prior art; The beneficial effect of the utility model is: through the harmonic compensation circuit; Gather the harmonic current signal of said rectification circuit output; And first sampled signal of the said harmonic current signal and first sample circuit injected to said control circuit, reducing the total harmonic distortion of circuit of power factor correction, thereby improve power factor.
The utility model also provides a kind of integrated circuit that utilizes described circuit of power factor correction to make, and its advantage is: integrated, and be convenient to Installation and Debugging, receive external interference few.
The utility model also provides a kind of Switching Power Supply of utilizing described circuit of power factor correction to make, and its advantage is: the power factor that can improve Switching Power Supply.
Description of drawings
Fig. 1 is the schematic diagram of existing circuit of power factor correction;
Fig. 2 is existing circuit of power factor correction input desired voltage current waveform figure;
Fig. 3 is the virtual voltage current waveform figure of the input of the existing circuit of power factor correction that is provided with filter circuit;
Fig. 4 is the frame principle figure of the utility model embodiment circuit of power factor correction;
Fig. 5 is the circuit theory diagrams of the utility model embodiment circuit of power factor correction;
Fig. 6 is the oscillogram of the utility model embodiment harmonic current signal;
Fig. 7 is the electric current and voltage stream shape figure of the utility model embodiment circuit of power factor correction input.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail:
Like Fig. 4, shown in Figure 5, (Power Factor Correction PFC), comprises the rectification circuit that line voltage is carried out rectification to the utility model embodiment circuit of power factor correction, the corresponding connection with the input of booster circuit of the output of said rectification circuit; And connect filter circuit between the input of said rectification circuit and/or the output;
Said booster circuit is realized boosting and power factor correction under the control of control circuit; Its circuit connection structure comprises first inductance L 1 and the first diode D1 that are serially connected in said rectification circuit output plus terminal, and the common intersection of said first inductance L 1 and the first diode D1 is through the switching tube S1 drain-source utmost point, sampling resistor Rs ground connection; When switching tube S1 conducting, electrical network is that first inductance L 1 provides energy after rectification, filtering; When switching tube S1 breaks off, the first diode D1 conducting, the electrical network and first inductance L 1 release energy to output, with the output voltage of the said rectification circuit that raises;
Said control circuit is used for controlling the switching tube S1 of said booster circuit, thereby the power factor of correcting power factors correcting circuit improves the power factor of circuit of power factor correction input; Its circuit connection structure comprises, comprises first sample circuit, reference voltage signal Vref, operational amplifier U1, compensating network, second sample circuit, multiplier M1, voltage comparator U2, Drive and Control Circuit;
Said reference voltage signal Vref is input to the normal phase input end of said operational amplifier U1;
Said first sample circuit, the output voltage of the said booster circuit of sampling, and export the first sampled signal V
FGive the inverting input of operational amplifier U1, wherein, the inverting input of operational amplifier U1 is as the feedback signal input F of said control circuit; First sample circuit in the present embodiment; First resistance R 1 and second resistance R 2 between the output plus terminal Vo+ that employing is connected in parallel on said booster circuit and the output negative terminal Vo-, that connect, said first resistance R 1 is connected feedback signal input F with the common intersection of second resistance R 2;
Said operational amplifier U1 is used for the said first sampled signal V
FCompare back output error signal V with reference voltage signal Vref
EThis error signal V
ESize along with the first sampled signal V
FAnd the difference size variation between the reference voltage signal Vref and changing;
Be connected with compensating network between the output of said operational amplifier U1 and its inverting input; Said compensating network can adopt the RC series circuit;
Second sample circuit is used to the output voltage of said rectification circuit of sampling, and exports the second sampled signal V
S
Multiplier is used for the said second sampled signal V
SWith said error signal V
ECarry out the phase multiplication;
Said voltage comparator U2 goes to control said Drive and Control Circuit after the current sampling signal
of the switching tube S1 of the output signal of said multiplier M1 and said booster circuit compared;
Said Drive and Control Circuit is used for the switching tube S1 according to the said booster circuit of output signal controlling of voltage comparator U2.
Particularly; In voltage comparator U2; When current sampling signal
is exported signal more than or equal to multiplier M1; Said voltage comparator U2 output control signal is through the switching tube S1 shutoff of the said booster circuit of drive control circuit.
In addition, when said control circuit was the Critical Control mode, described Drive and Control Circuit detected the zero passage moment of first inductance L, 1 electric current in the said booster circuit; When the zero passage that detects electric current constantly the time, output drive signal is used to control the conducting of the switching tube S1 of booster circuit.
The harmonic compensation circuit; Be used for converting the voltage signal after the line voltage rectification into harmonic current signal Ix; And said harmonic current signal Ix injected to said control circuit, the total harmonic distortion with the input current that reduces said circuit of power factor correction improves power factor; As shown in Figure 5, the harmonic compensation circuit among the utility model embodiment is connected said rectification circuit output plus terminal V
DC+ and feedback signal input F between; Said harmonic compensation circuit comprises the 3rd resistance R 3 and the 3rd capacitor C 3 of series connection successively; Convert the output voltage of said rectification circuit into harmonic current signal Ix, and be injected among the operational amplifier U1 of said control circuit through said feedback signal input F.
The utility model work principle of Power Factor Correction Circuit is: first sample circuit sampling booster circuit output voltage, and export the first sampled signal V
F, this first sampled signal V
FHarmonic current signal I with the generation of harmonic compensation circuit
XGive operational amplifier U1 after the stack, compare and enlarge back output error signal V with the reference voltage reference signal Vref of operational amplifier U1
EGive multiplier M1, as first input signal of multiplier M1; Pass through the output voltage of second sample circuit sampling rectification circuit again, and export the second sampled signal V
SGive multiplier M1, as second input signal of multiplier M1; Multiplier M1 multiplies each other above-mentioned two input signals afterwards and the current sampling signal V of switching tube S1
RSCompare; Come control switch pipe S1 through the controlling and driving control circuit; Make the current peak of switching tube S1 follow the variation of input voltage, thereby make the input current of circuit of power factor correction follow the variation of input voltage, improve power factor, reduce harmonic distortion.
Because current sampling signal V with the switching tube S1 of booster circuit
RSThe signal of comparing is the output signal from multiplier M1; And the output signal of multiplier is multiplied each other by second sampled signal of the output signal of operational amplifier U1 and sampling Output Voltage in Rectified Circuits and obtains; Therefore, under the control of control circuit, the input current of said booster circuit; Both follow the variation of Output Voltage in Rectified Circuits, followed booster circuit output voltage sampled signal V again
FWith the variation of the difference of reference voltage reference signal Vref, also promptly, booster circuit had both been realized the function of power factor correction under the control of control circuit, realized the magnitude of voltage that its output voltage is surely set at reference voltage reference signal Vref again.Simultaneously, the output voltage that this reference voltage is set is higher than the input voltage of the circuit that boosts, and therefore is called booster circuit.
Wherein, rectification circuit can adopt rectifier bridge or full-wave rectification diode, and present embodiment adopts rectifier bridge BD.
Wherein, harmonic current signal Ix is:
Wherein, Output Voltage in Rectified Circuits V
DCWaveform, can be expressed as for the function of time t: V
DC=| sin (ω t) |
As shown in Figure 6, and with reference to above-mentioned I
XFormula can know: in the one-period of the output voltage of rectification circuit, promptly at Output Voltage in Rectified Circuits V
DCAdjacent two zero crossings between, the curve approximation of harmonic current signal Ix is in the curve of sin (ω t) between 90 °～270 °; Harmonic current signal waveform and Output Voltage in Rectified Circuits be harmonic current signal waveform leading angle θ on phase place, and this angle θ and resistance R 3 have following relation with capacitor C 3:
That is, when the appearance value of resistance that reduces resistance R 3 and/or capacitor C 3, the value of angle θ will increase, and the phase difference of harmonic current signal and Output Voltage in Rectified Circuits also increases.
Visible from the formula of above-mentioned tan θ, < 90 ° of the phase difference angle θ of harmonic current signal waveform and rectifier output voltage.
As shown in Figure 6, because sin (ω t) is taken absolute value in the function expression of Ix, therefore, at the zero cross near of rectification input voltage Vdc, harmonic wave input current is steeper.
Harmonic current signal Ix acts on the inverting input of operational amplifier U1; After operational amplifier U1 output; The signal of its output makes near the value the peak value of input current Iin ' of its input of power factor compensation circuit reduce than the peak value of the input current Iin of the input that does not increase the harmonic compensation circuit, and the current value of zero cross near has raise (please refer to Fig. 6), has reduced the distortion degree of input current; Improve power factor, reduced total harmonic distortion; In addition, the distortion factor that is similar to constant time period current waveform in the zero cross near amplitude reduces, and promptly increases before the harmonic compensation circuit; The approximate constant time period of the amplitude of the input current waveform Iin ' of input is in t4-t1 and the t8-t5 time period scope, increases after the harmonic compensation circuit, and the approximate constant time period of the amplitude of the input current waveform Iin ' of its circuit of power factor correction input is in t3-t2 and the t7-t6 time period scope; Wherein, t1 t2 t3 t4 t5 t6 t7 t8, hence one can see that; After increasing the harmonic compensation circuit; Further improved power factor, (Total Harmonic Distortion THD) has reduced to have reduced total harmonic distortion.
Therefore, the utility model circuit of power factor correction power factor that can improve, reduce the total harmonic distortion of the input current of circuit of power factor correction input.
The utility model also provides a kind of integrated circuit that utilizes above-mentioned circuit of power factor correction to make, and its advantage is: integrated, and be convenient to Installation and Debugging, receive external interference few.
The utility model provides a kind of Switching Power Supply of utilizing above-mentioned circuit of power factor correction to make again, and said switching circuit comprises the circuit of power factor correction in rectification circuit, filter circuit and the foregoing description.The utility model utilizes the Switching Power Supply of above-mentioned circuit of power factor correction making, can improve the power factor of Switching Power Supply input.
The above only is the application's a preferred implementation; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the application's protection range.
Claims (10)
1. a circuit of power factor correction comprises the rectification circuit that line voltage is carried out rectification, the corresponding connection with the input of booster circuit of the output of said rectification circuit; And connect filter circuit between the input of said rectification circuit and/or the output;
Said booster circuit is realized boosting and power factor emendation function under the control of control circuit;
Said control circuit has the feedback signal input, is used for controlling the switching tube (S1) of said booster circuit;
It is characterized in that, also comprise
The harmonic compensation circuit; Be used for converting the voltage signal after the line voltage rectification into harmonic current signal (Ix); And said harmonic current signal (Ix) injected to said control circuit, to reduce the input current harmonics distortion of said circuit of power factor correction, improve power factor.
2. circuit of power factor correction as claimed in claim 1; It is characterized in that; Said booster circuit; Comprise first inductance (L1) and first diode (D1) that are serially connected in level behind said rectification circuit and the filter circuit, said first inductance (L1) passes through switching tube (S1) the drain-source utmost point, sampling resistor (Rs) ground connection with the common intersection of first diode (D1).
3. circuit of power factor correction as claimed in claim 1; It is characterized in that; Said control circuit comprises first sample circuit, reference voltage signal (Vref), operational amplifier (U1), compensating network, second sample circuit, multiplier (M1), voltage comparator (U2), Drive and Control Circuit;
Said reference voltage signal (Vref) is input to the normal phase input end of said operational amplifier (U1);
Said first sample circuit, the output voltage of the said booster circuit of sampling, and export the first sampled signal (V
F) give the inverting input of operational amplifier (U1), wherein, the inverting input of operational amplifier (U1) is as the feedback signal input (F) of said control circuit;
Said operational amplifier (U1) is used for the said first sampled signal (V
F) compare and enlarge back output error signal (V with reference voltage signal (Vref)
E);
Second sample circuit is used to the output voltage of said rectification circuit of sampling, and exports the second sampled signal (V
S);
Multiplier (M1) is used for the said second sampled signal (V
S) and said error signal (V
E) carry out the phase multiplication;
Said voltage comparator (U2) goes to control said Drive and Control Circuit after the current sampling signal
of the switching tube (S1) of the output signal of said multiplier (M1) and said booster circuit compared;
Said Drive and Control Circuit is used for the shutoff according to the switching tube (S1) of the said booster circuit of output signal controlling of voltage comparator (U2).
4. circuit of power factor correction as claimed in claim 3 is characterized in that, said Drive and Control Circuit, also be used for detecting said booster circuit first inductance (L1) electric current zero passage constantly; When the zero passage that detects electric current constantly the time, output drive signal is used to control the conducting of the switching tube (S1) of booster circuit.
5. circuit of power factor correction as claimed in claim 3; It is characterized in that; Said first sample circuit be the output plus terminal (Vo+) that is connected in parallel on said booster circuit with output negative terminal (Vo-) between, first resistance (R1) and second resistance (R2) of connect, the common intersection of said first resistance (R1) and second resistance (R2) is feedback signal input (F).
6. circuit of power factor correction as claimed in claim 3 is characterized in that, is connected with compensating network between the output of said operational amplifier (U1) and its inverting input.
7. circuit of power factor correction as claimed in claim 1 is characterized in that, said harmonic compensation circuit is connected said rectification circuit output plus terminal (V
DC+) and the feedback signal input (F) of said control circuit between; Convert the output voltage of said rectification circuit into harmonic current signal (Ix), and said harmonic current signal (Ix) is injected in the said control circuit through the feedback signal input (F) of said control circuit.
8. circuit of power factor correction as claimed in claim 7 is characterized in that, said harmonic compensation circuit comprises the 3rd resistance (R3) and the 3rd electric capacity (C3) of series connection successively.
9. an integrated circuit is characterized in that, comprises the described circuit of power factor correction like claim 1-7.
10. a Switching Power Supply is characterized in that, comprises the described circuit of power factor correction like claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201426648U CN202602533U (en) | 2012-04-06 | 2012-04-06 | Power factor correction circuit, and integrated circuit and switch power supply for the manufacture of the power factor correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201426648U CN202602533U (en) | 2012-04-06 | 2012-04-06 | Power factor correction circuit, and integrated circuit and switch power supply for the manufacture of the power factor correction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202602533U true CN202602533U (en) | 2012-12-12 |
Family
ID=47320044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201426648U Expired - Lifetime CN202602533U (en) | 2012-04-06 | 2012-04-06 | Power factor correction circuit, and integrated circuit and switch power supply for the manufacture of the power factor correction circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202602533U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983761A (en) * | 2012-12-13 | 2013-03-20 | 北京赛德高科铁道电气科技有限责任公司 | Voltage switching circuit |
| CN103390995A (en) * | 2013-07-18 | 2013-11-13 | 矽力杰半导体技术(杭州)有限公司 | PFC (power factor correction) circuit |
| CN104871421A (en) * | 2012-12-21 | 2015-08-26 | 陈威伦 | Single-pole switch power source |
| CN106787675A (en) * | 2016-12-28 | 2017-05-31 | 成都芯源***有限公司 | Resonant converter with power factor correction function and controller thereof |
| CN109842286A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of pfc circuit |
| CN113765348A (en) * | 2021-10-19 | 2021-12-07 | 上海联影医疗科技股份有限公司 | High-voltage power supply and medical imaging equipment |
-
2012
- 2012-04-06 CN CN2012201426648U patent/CN202602533U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983761A (en) * | 2012-12-13 | 2013-03-20 | 北京赛德高科铁道电气科技有限责任公司 | Voltage switching circuit |
| CN102983761B (en) * | 2012-12-13 | 2015-08-19 | 北京赛德高科铁道电气科技有限责任公司 | A kind of voltage conversion circuit |
| CN104871421A (en) * | 2012-12-21 | 2015-08-26 | 陈威伦 | Single-pole switch power source |
| CN104871421B (en) * | 2012-12-21 | 2018-07-13 | 陈威伦 | Mono-pole switch power supply |
| CN103390995A (en) * | 2013-07-18 | 2013-11-13 | 矽力杰半导体技术(杭州)有限公司 | PFC (power factor correction) circuit |
| CN103390995B (en) * | 2013-07-18 | 2015-09-30 | 矽力杰半导体技术(杭州)有限公司 | A kind of pfc circuit |
| CN106787675A (en) * | 2016-12-28 | 2017-05-31 | 成都芯源***有限公司 | Resonant converter with power factor correction function and controller thereof |
| CN109842286A (en) * | 2017-11-27 | 2019-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of pfc circuit |
| CN113765348A (en) * | 2021-10-19 | 2021-12-07 | 上海联影医疗科技股份有限公司 | High-voltage power supply and medical imaging equipment |
| CN113765348B (en) * | 2021-10-19 | 2024-02-02 | 上海联影医疗科技股份有限公司 | High-voltage power supply and medical imaging equipment |
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Granted publication date: 20121212 |