CN2524423Y - Monophase active power factor calibration rectifying circuit - Google Patents
Monophase active power factor calibration rectifying circuit Download PDFInfo
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- CN2524423Y CN2524423Y CN 02215487 CN02215487U CN2524423Y CN 2524423 Y CN2524423 Y CN 2524423Y CN 02215487 CN02215487 CN 02215487 CN 02215487 U CN02215487 U CN 02215487U CN 2524423 Y CN2524423 Y CN 2524423Y
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Abstract
Monophase active power factor calibration rectifying circuit of the utility model comprises a uncontrolled bridge rectifier, a voltage and current rated signal sampling circuit, a current detection circuit, a power factor calibrating circuit with a power switch, a DC output voltage sampling circuit, an outer voltage loop circuit consisting of a proportional integral regulator and a multiplier, an inner current loop circuit with a proportional integral regulator, a carrier signal generator and a comparator. DC voltage output by the circuit is always lower than peak of the input AC current, and input DC voltage fluctuates little. Within the scope of effective value of input AC voltage, i.e. 170V-260V, a power factor is higher than 0.98. In each half power frequency period, the power switch stops working for a continuous time of 3ms approximately. In such period, the rectifying circuit does not produce high frequency electromagnetic interference to a power network, a zero line utilized to input AC power supply can be used as communication channel to transmit signals. The utility model can be broadly applicable for household electric appliances, such as inverter air conditioner, inverter refrigerator, inverter washing machine, and etc.
Description
Technical field
The utility model relates to a kind of single-phase active power factor correction rectification circuit.
Background technology
Along with the continuous development of power electronic technology and Control Technique of Microcomputer, various RHVC become better and approaching perfection day by day, and have obtained extensive use in every field.But some problems of bringing are thus also more and more paid close attention to by people, such as: cause the increase of mains by harmonics electric current, electrical source power factor to descend the electromagnetic interference that the rapid variation of internal switch voltage and switching current causes etc.Consider ratio of performance to price factor, at present generally all adopt single-phase active power factor correction rectification circuit based on uncontrollable rectifier bridge in field of household appliances.The shortcoming of conventional Boost rectification circuit is: 1) DC side output voltage height.Exchanging under 220 volts of initial conditions, the DC side output voltage is compared with not controlling rectification transformating circuit generally near 400V, and the withstand voltage level of all devices and maintenance echelon are all wanted a high level; 2) power switch works in the high frequency state all the time, and there is electromagnetic interference in electrical network.Convertible frequency air-conditioner with field of household appliances is an example, and the domestic variable frequency air-conditioning generally is made up of indoor set and off-premises station, needs communication between them.The traditional air-conditioning that adopts uncontrollable rectifier power source power supply is for reducing cost, and the zero line of generally using input ac power carries out communication as channel.Because the Boost rectification circuit exists high-frequency electromagnetic to disturb, it is very difficult to make that the zero line that utilizes input ac power carries out communication.
Summary of the invention
The purpose of this utility model provides a kind of output dc voltage and is lower than the input ac voltage peak value all the time, and power factor is higher, do not have the single-phase active power factor correction rectification circuit that communication is disturbed in short-term.
Single-phase active power factor correction rectification circuit of the present utility model is based on the ovennodulation principle design.It comprises does not control rectifier bridge, the given signal sample circuit of electric current and voltage, current detection circuit, the circuit of power factor correction that contains power switch, the output dc voltage sample circuit, the outer voltage circuit of forming by proportional and integral controller and multiplier, current inner loop circuit with proportional and integral controller, carrier signal generator and comparator, by not controlling rectifier bridge the input AC electric rectification is become half-sinusoid, divide two-way to be defeated by given signal sample circuit of electric current and voltage and current detection circuit respectively, the sensed current signal of current detection circuit output is defeated by the current inner loop circuit, another road output links to each other with the input of circuit of power factor correction, the output of circuit of power factor correction links to each other with the input of output dc voltage sample circuit, the outer voltage circuit is defeated by in the output of output dc voltage sample circuit and the given signal sample circuit of electric current and voltage jointly, the current tracking signal of outer voltage circuit output is defeated by the current inner loop circuit, the carrier signal of the modulation wave signal of current inner loop circuit output and carrier signal generator output is defeated by comparator jointly, obtain the width-modulation pulse signal after relatively and be defeated by circuit of power factor correction, be used for the power controlling switch on and off.
The operation principle of this circuit is: do not control rectifier bridge the input AC electric rectification is become half-sinusoid, through the given signal sample circuit sampling of electric current and voltage, obtain the given signal of current tracking and be defeated by the outer voltage circuit with the voltage given signal that size is directly proportional with the effective value of input ac voltage, the outer voltage circuit carries out the proportional integral dynamic adjustments to the output dc voltage from the output dc voltage sample circuit on the one hand, to guarantee that output dc voltage is lower than the peak value of input ac voltage all the time, on the other hand will be after the proportional integral dynamic adjustments gained signal and the given signal multiplication of the given signal sample circuit gained of electric current and voltage electric current, be defeated by the current inner loop circuit as the tracking signal of electric current.By the current inner loop circuit with the current tracking signal of input and from the sensed current signal of current detection circuit after the proportional integral dynamic adjustments, the output modulating wave, the carrier wave output of modulating wave and carrier signal generator through comparator relatively, at the time interval of modulating wave peak value less than the carrier wave peak value, produce the high-frequency pulsed width modulation pulse signal, electric current can be followed the tracks of sinusoidal waveform, and at the time interval of modulating wave peak value greater than the carrier wave peak value, intervally during this period of time approach the time interval of peak value corresponding to input ac voltage, switch turn-offs.Nearly 3ms power switch continuous time quits work in per half power frequency period, at this moment, because switch is not worked, can not produce High-frequency Interference in electrical network.
Single-Phase Active Power Factor Correction Circuit of the present utility model, the direct voltage of output is lower than the input ac voltage peak value all the time, and output dc voltage fluctuation is little, and the sudden change of load and input ac voltage is had the Fast Dynamic responding ability.In input ac voltage effective value 170V～260V scope, power factor is higher than 0.98.Power switch is operated in the high frequency state in the most of the time of power frequency period.In per half power frequency period, nearly 3ms power switch continuous time quits work.In the section, rectification circuit does not have high-frequency electromagnetic to electrical network to be disturbed at this moment, can utilize the zero line of input ac power to carry out the signal transmission as communication channel.
The utility model can be widely used in the field of household appliances that requirement has superior performance price ratio, as convertible frequency air-conditioner, and frequency conversion refrigerator, variable-frequency washing machine etc.
Description of drawings
Fig. 1 is the utility model forming circuit block diagram;
Fig. 2 is another forming circuit block diagram of the utility model;
Fig. 3 is a kind of physical circuit example of the utility model.
Embodiment
With reference to Fig. 1, single-phase active power factor correction rectification circuit of the present utility model comprises does not control rectifier bridge 2, the given signal sample circuit 3 of electric current and voltage, current detection circuit 4, the circuit of power factor correction 5 that contains power switch, output dc voltage sample circuit 6, the outer voltage circuit of forming by proportional and integral controller and multiplier 7, current inner loop circuit 8 with proportional and integral controller, carrier signal generator 9 and comparator 10, by not controlling rectifier bridge 2 the input AC electric rectification is become half-sinusoid, divide two-way to be defeated by given signal sample circuit 3 of electric current and voltage and current detection circuit 4 respectively, the sensed current signal of current detection circuit 4 outputs is defeated by current inner loop circuit 8, another road output links to each other with the input of circuit of power factor correction 5, the output of circuit of power factor correction 5 links to each other with the output of output dc voltage sample circuit 6, outer voltage circuit 7 is defeated by in the output of the given signal sample circuit 3 of output dc voltage sample circuit 6 and electric current and voltage jointly, the current tracking signal of outer voltage circuit 7 outputs is defeated by current inner loop circuit 8, comparator 10 is defeated by in the signal of current inner loop circuit 8 outputs and the output of carrier signal generator 9 jointly, obtain the width-modulation pulse signal through comparator 10 after relatively and be defeated by circuit of power factor correction 5, be used for the power controlling switch on and off.
In order to obtain the communication triggering signal, so that in power switch off-air time section, can utilize the zero line of input ac power to carry out communication, usually, can be as shown in Figure 2, at single-phase active power factor correction rectification circuit signalization treatment circuit 11, one of them input of signal processing circuit links to each other with the output of current inner loop circuit 8, another input links to each other with the output of comparator 10, and the output of signal processing circuit links to each other with the control end of power switch V.
Fig. 2 is a kind of instantiation of single-phase active power factor correction rectification circuit.
This example, not controlling rectifier bridge 2 is made of diode D1～D4, the given signal sample circuit 3 of electric current and voltage comprises that being connected across rectifier bridge exports the series resistance R1 of positive and negative polarity end, R2, R3, the capacitor C 4 in parallel with resistance R 3, one end links to each other with resistance R 2 contacts with resistance R 1, the dividing potential drop sampling that the capacitor C 3 that the other end links to each other with the negative polarity end is formed, obtain the voltage given signal, and be connected across the series resistance R4 that rectifier bridge is exported positive and negative polarity end, the dividing potential drop sampling that R5 forms obtains the given signal of electric current.Current detection circuit 4 adopts a current transformer to detect the current signal that flows through, the former edge joint circuit of power factor correction 5 of current transformer, pay edge joint current inner loop circuit 8, circuit of power factor correction 5 is by inductance L, and power switch V, diode D, capacitor C and load R form.The output dc voltage sample circuit 6 that is connected to circuit of power factor correction 5 outputs comprises series resistance R6, R7 and is connected across the capacitor C 5 at resistance R 7 two ends.Outer voltage circuit 7 comprises by amplifier AP1, proportional and integral controller and multiplier A that resistance R 8, R9 and capacitor C 6 are formed, the negative input end of amplifier AP1 links to each other through the output of resistance R 8 with output dc voltage sample circuit 6, a positive input terminal that the voltage given signal of given signal sample circuit 3 outputs of electric current and voltage and the given signal of electric current are imported amplifier AP1 respectively and the input of multiplier A, the output of amplifier AP1 links to each other with another input of multiplier.Current inner loop circuit 8 has by amplifier AP2, the proportional and integral controller that resistance R 10, R11, R14 and capacitor C 7, C8 form.The positive input terminal of amplifier AP2 links to each other with the output of multiplier A in the outer voltage circuit 7 through resistance R 14, the sensed current signal of negative input end input current testing circuit 4.The output of amplifier AP2 links to each other with the positive input terminal of comparator 10, and the output signal end of carrier signal generator 9 links to each other with the negative input end of comparator 10.Be provided with signal processing circuit 11 in the illustrated example, it comprises comparator A2, A3, not gate N1, N2, N3, and with door N4, N5, reference level U1, U2, and corresponding Resistor-Capacitor Unit.Link to each other with the output of comparator 10 with the input of door N5, the width-modulation pulse signal of input comparator 10 outputs, the negative input end of comparator A2 links to each other with the output of amplifier AP2, the modulation wave signal of loop circuit output in the input current.The negative input end of the positive input terminal of comparator A2 and comparator A3 meets reference level U1 respectively, U2, after comparator A2 compares the output signal of current inner loop circuit and reference level U1, through Resistor-Capacitor Unit R12, R13, C9 filtering, send into comparator A3, compare with reference level U2 again, the gained signal divides two the tunnel, two the not gate N1 in one road, connect a input after the N2 time-delay with door N4, another road connects another input with door N4, through with door N4 with after obtain the communication triggering signal, be used for communication, simultaneously, the communication triggering signal is through the anti-phase interference cancellation signals that obtains of not gate N3, sends into another input with door N5 again, links to each other with the control end of power switch V with the output of door N5.Through with door N5 the interference cancellation signals of input and width-modulation pulse signal are carried out with after, export switch control wave power controlling switch V break-make, above-mentioned carrier signal generator 9 can be used the monolithic function generator, as ICL8038.Signal processing circuit also can adopt microprocessor, as single-chip microcomputer MCS-51.
Claims (4)
1. single-phase active power factor correction rectification circuit, it is characterized in that it comprises does not control rectifier bridge [2], the given signal sample circuit of electric current and voltage [3], current detection circuit [4], the circuit of power factor correction [5] that contains power switch, output dc voltage sample circuit [6], the outer voltage circuit of forming by proportional and integral controller and multiplier [7], current inner loop circuit [8] with proportional and integral controller, carrier signal generator [9] and comparator [10], by not controlling rectifier bridge [2] the input AC electric rectification is become half-sinusoid, divide two-way to be defeated by given signal sample circuit of electric current and voltage [3] and current detection circuit [4] respectively, the sensed current signal of current detection circuit [4] output is defeated by current inner loop circuit [8], another road output links to each other with the input of circuit of power factor correction [5], the output of circuit of power factor correction [5] links to each other with the input of output dc voltage sample circuit [6], outer voltage circuit [7] is defeated by in the output of output dc voltage sample circuit [6] and the given signal sample circuit of electric current and voltage [3] jointly, the current tracking signal of outer voltage circuit [7] output is defeated by current inner loop circuit [8], the carrier signal of the modulation wave signal of current inner loop circuit [8] output and carrier signal generator [9] output is defeated by comparator [10] jointly, obtain the width-modulation pulse signal after relatively and be defeated by circuit of power factor correction [5], be used for the power controlling switch on and off.
2. by the described single-phase active power factor correction of claim 1 rectification circuit, it is characterized in that it also comprises signal processing circuit [11], one of them input of signal processing circuit links to each other with the output of current inner loop circuit [8], another input links to each other with the output of comparator [10], and the output of signal processing circuit links to each other with the control end of power switch V.
3. by the described single-phase active power factor correction of claim 2 rectification circuit, it is characterized in that said signal processing circuit [11] comprises comparator [A2], [A3], not gate [N1], [N2], [N3] are with door [N4], [N5], reference level [U1], [U2], and corresponding Resistor-Capacitor Unit.
4. by claim 1 or 2 described single-phase active power factor correction rectification circuits, it is characterized in that carrier signal generator [9] is the monolithic function generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215487 CN2524423Y (en) | 2002-01-29 | 2002-01-29 | Monophase active power factor calibration rectifying circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02215487 CN2524423Y (en) | 2002-01-29 | 2002-01-29 | Monophase active power factor calibration rectifying circuit |
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| CN2524423Y true CN2524423Y (en) | 2002-12-04 |
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| CN 02215487 Expired - Fee Related CN2524423Y (en) | 2002-01-29 | 2002-01-29 | Monophase active power factor calibration rectifying circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1966827B (en) * | 2005-11-17 | 2010-08-18 | Lg电子株式会社 | A device and a method for driving the motor of a washing machine |
| CN101325367B (en) * | 2007-06-14 | 2010-09-22 | 海尔集团公司 | Circuit for correcting part active power factor |
| CN101656467B (en) * | 2008-08-18 | 2013-01-30 | 海尔集团公司 | Power factor correcting circuit of part of active power supplies |
| CN110120753A (en) * | 2019-05-21 | 2019-08-13 | 山东艾诺仪器有限公司 | A kind of single-phase rectifier analog control circuit |
-
2002
- 2002-01-29 CN CN 02215487 patent/CN2524423Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1966827B (en) * | 2005-11-17 | 2010-08-18 | Lg电子株式会社 | A device and a method for driving the motor of a washing machine |
| CN101325367B (en) * | 2007-06-14 | 2010-09-22 | 海尔集团公司 | Circuit for correcting part active power factor |
| CN101656467B (en) * | 2008-08-18 | 2013-01-30 | 海尔集团公司 | Power factor correcting circuit of part of active power supplies |
| CN110120753A (en) * | 2019-05-21 | 2019-08-13 | 山东艾诺仪器有限公司 | A kind of single-phase rectifier analog control circuit |
| CN110120753B (en) * | 2019-05-21 | 2024-03-12 | 山东艾诺智能仪器有限公司 | Single-phase rectification analog control circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |