CN105515373A - Non-isolation type switch power supply with high-power factor correction - Google Patents
Non-isolation type switch power supply with high-power factor correction Download PDFInfo
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- CN105515373A CN105515373A CN201410552376.3A CN201410552376A CN105515373A CN 105515373 A CN105515373 A CN 105515373A CN 201410552376 A CN201410552376 A CN 201410552376A CN 105515373 A CN105515373 A CN 105515373A
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- 238000002955 isolation Methods 0.000 title claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000003321 amplification Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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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- Dc-Dc Converters (AREA)
Abstract
The invention relates to a non-isolation type switch power supply with high-power factor correction. The power supply is used for a switch power supply topology structure and comprises an input voltage sampling circuit, an output voltage sampling circuit, an input voltage error amplifier, an output voltage error amplifier, a multiplier and a PWM comparator. The input voltage sampling circuit is connected between a power supply input end and the first input end of the multiplier. The output end of the input voltage error amplifier is connected with the input end of the PWM comparator. The other input end and the other output end of the PWM comparator are respectively connected with a triangular wave generator and the control end of a power pipe in a switch power supply topology. According to the invention, power factor correction of electrical appliances can be achieved; the power factor of a system is remarkably increased; and the EMC index of the system is also improved. The power supply is also applicable for circuit achievement of the same type of APFC control devices and has high engineering reference value.
Description
Technical field
The present invention relates to electronic circuit field, particularly, relate to a kind of non-isolation type Switching Power Supply of high power factor correction.
Background technology
Power prime many employings diode full-bridge rectification mode of current household electrical appliance, this can cause harmonic pollution in electric power net, power factor declines, idle component is mainly high order harmonic component, wherein triple-frequency harmonics amplitude is about 95% of first harmonic magnitude, and the 70%. the seventh harmonic amplitudes that quintuple harmonics amplitude is about first harmonic magnitude are about 45% of first harmonic magnitude.High order harmonic component can work the mischief to electrical network, and the input power factor of power consumption equipment is declined, and produces very strong electromagnetic interference (EMI), causes potential hazard to the safe operation of electrical network and other power consumption equipments.Non-isolation type Switching Power Supply (the ActivePowerFactorCorrector of high power factor correction, APFC) input current of power supply can be transformed to and input the synchronous sine wave of civil power, thus improve the power factor of electric equipment, reduce the harmonic pollution to electrical network.In theory, the converter topology such as buck (Buck), boost type (Boost), lifting/lowering pressure type (Boost-Buck) and inverse-excitation type (Flyback) all can be used as the main circuit of APFC.Wherein, BoostAPFC is simple current-mode control, and power factor value is high, and total harmonic distortion is little, and efficiency is high, but output voltage is higher than input voltage, is applicable to 75 ~ 2000W power power-supply, is widely used.
The continuous current mode of boost type APFC, energy storage inductor can be used as filter and suppresses radio frequency interference (RFI) and EMI noise, and preventing electrical network from impacting the high frequency transient of main circuit. circuit has boost chopper, output voltage is greater than input voltage peak value, the input voltage range that power supply allows expands, and usually can reach 90 ~ 270V, improves the adaptability of power supply, and boost type APFC controls simple, the power bracket be suitable for is wide.
Summary of the invention
For realizing a kind of Switching Power Supply of High Power Factor, the invention discloses a kind of non-isolation type Switching Power Supply of high power factor correction.
The non-isolation type Switching Power Supply of high power factor correction of the present invention, for switch power supply topological structure, comprise input voltage sample circuit, output voltage sampling circuit, input voltage error amplifier, output voltage error amplifier, multiplier and PWM comparator, described input voltage sample circuit is connected between power input and multiplier first input end, output voltage sampling circuit is connected between power output end and output voltage error amplifier, the output of described output voltage error amplifier connects multiplier second input, output and the power input of described multiplier are connected two inputs of input voltage error amplifier respectively, the output of described input voltage error amplifier connects the input of PWM comparator, another input and the output of described PWM comparator are connected the control end of power tube in triangular-wave generator and Switching Power Supply topology respectively.
Preferably, also building-out capacitor is connected with between the inverting input of described input voltage sample circuit and output.
Preferably, also building-out capacitor is connected with between the inverting input of described output voltage sampling circuit and output.
Concrete, input voltage sample circuit and/or output voltage sampling circuit are the divider resistance string be connected between sampled point and ground.
Concrete, described switch power supply topological structure be in BOOST, BUCK or BUCK-BOOST any one.
The non-isolation type Switching Power Supply of high power factor correction of the present invention, adopt the average current control mode principle of voltage and current double closed-loop, can realize the power factor correction of electric equipment, the power factor of system significantly improves.Meanwhile, the EMC index of system also improves.The present invention is also applicable to the circuit realiration of other APFC control devices of the same type, has project reference value widely.
Accompanying drawing explanation
Fig. 1 is a kind of embodiment schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
The non-isolation type Switching Power Supply of high power factor correction of the present invention, for switch power supply topological structure, comprise input voltage sample circuit S1, output voltage sampling circuit S2, input voltage error amplifier CA, output voltage error amplifier VA, multiplier M and PWM comparator, described input voltage sample circuit is connected between power input and multiplier first input end, output voltage sampling circuit is connected between power output end and output voltage error amplifier, the output of described output voltage error amplifier connects multiplier second input, output and the power input of described multiplier are connected two inputs of input voltage error amplifier respectively, the output of described input voltage error amplifier connects the input of PWM comparator, another input and the output of described PWM comparator are connected the control end of power tube in triangular-wave generator TR and Switching Power Supply topology respectively.
In Fig. 1, inductive current iL detected, then obtain signal iLR1, sent in current error amplifier CA by this signal, current reference value exports z by multiplier, and multiplier has two inputs, one is x, is the error signal between output voltage Vo/H and reference voltage V ref; Another inputs y, for the detected value VDC/K of voltage DC, VDC are the full-wave rectification value of input sinusoidal voltage.
According to power requirement, the power device of power circuit is selected as follows: Boost inductance L 2 value 470 μ H; Switching tube VQ1 is IRFP460, and its major parameter is: drain-source pole minimum break-down voltage 500V, and the maximum conducting resistance of drain-source pole is O.27 Ω, maximum On current 20A; Rectifier diode VD1 chooses Schottky diode STFA806, and its major parameter is: working inverse voltage 600V, forward average operating current 8A.Output capacitance C14 value 2200 μ F/450V.
The electric current loop of average current model regulates input current average value, makes itself and input rectifying voltage in phase, close to sinusoidal waveform.Input current signal is detected directly, after comparing with reference current. and the change of its high fdrequency component, by current error amplifier, is averaged process.After average current error after amplification compares with sawtooth waveforms slope, to switch Tr drive singal, and determine its duty ratio, thus correcting current error rapidly and accurately.Because electric current loop has higher gain one bandwidth (gain-banelwidth), the distortion that tracking error is produced is less than 1%, easily realizes the power factor close to 1.
As mentioned above, the present invention can be realized preferably.
Claims (5)
1. the non-isolation type Switching Power Supply of high power factor correction, for switch power supply topological structure, it is characterized in that, comprise input voltage sample circuit, output voltage sampling circuit, input voltage error amplifier, output voltage error amplifier, multiplier and PWM comparator, described input voltage sample circuit is connected between power input and multiplier first input end, output voltage sampling circuit is connected between power output end and output voltage error amplifier, the output of described output voltage error amplifier connects multiplier second input, output and the power input of described multiplier are connected two inputs of input voltage error amplifier respectively, the output of described input voltage error amplifier connects the input of PWM comparator, another input and the output of described PWM comparator are connected the control end of power tube in triangular-wave generator and Switching Power Supply topology respectively.
2. the non-isolation type Switching Power Supply of high power factor correction according to claim 1, is characterized in that, is also connected with building-out capacitor between the inverting input of described input voltage sample circuit and output.
3. the non-isolation type Switching Power Supply of high power factor correction according to claim 1, is characterized in that, is also connected with building-out capacitor between the inverting input of described output voltage sampling circuit and output.
4. the non-isolation type Switching Power Supply of high power factor correction according to claim 1, is characterized in that, input voltage sample circuit and/or output voltage sampling circuit are the divider resistance string be connected between sampled point and ground.
5. the non-isolation type Switching Power Supply of high power factor correction according to claim 1, is characterized in that, described switch power supply topological structure be in BOOST, BUCK or BUCK-BOOST any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552376.3A CN105515373A (en) | 2014-10-19 | 2014-10-19 | Non-isolation type switch power supply with high-power factor correction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410552376.3A CN105515373A (en) | 2014-10-19 | 2014-10-19 | Non-isolation type switch power supply with high-power factor correction |
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| Publication Number | Publication Date |
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| CN105515373A true CN105515373A (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410552376.3A Pending CN105515373A (en) | 2014-10-19 | 2014-10-19 | Non-isolation type switch power supply with high-power factor correction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533204A (en) * | 2016-10-19 | 2017-03-22 | 南京博兰得电子科技有限公司 | Resonant AC/DC conversion device and control method thereof |
| CN112421943A (en) * | 2020-11-02 | 2021-02-26 | 安徽乐图电子科技有限公司 | A power factor correction control circuit and driving power supply |
-
2014
- 2014-10-19 CN CN201410552376.3A patent/CN105515373A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533204A (en) * | 2016-10-19 | 2017-03-22 | 南京博兰得电子科技有限公司 | Resonant AC/DC conversion device and control method thereof |
| CN112421943A (en) * | 2020-11-02 | 2021-02-26 | 安徽乐图电子科技有限公司 | A power factor correction control circuit and driving power supply |
| CN112421943B (en) * | 2020-11-02 | 2025-07-04 | 安徽乐图电子科技股份有限公司 | A power factor correction control circuit and driving power supply |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160420 |
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| WD01 | Invention patent application deemed withdrawn after publication |