CN2468222Y - Multi-channel parallel boost type power-factor correcting apparatus - Google Patents
Multi-channel parallel boost type power-factor correcting apparatus Download PDFInfo
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- CN2468222Y CN2468222Y CN 00257426 CN00257426U CN2468222Y CN 2468222 Y CN2468222 Y CN 2468222Y CN 00257426 CN00257426 CN 00257426 CN 00257426 U CN00257426 U CN 00257426U CN 2468222 Y CN2468222 Y CN 2468222Y
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Abstract
The utility model discloses a multi-channel parallel voltage boosting type power factor correcting apparatus. The utility model is composed of a power supply circuit, a rectifying bridge, a voltage boosting circuit and an active power factor control-driven circuit. The voltage boosting circuit is a parallel voltage boosting circuit with more than two circuits, more than one circuit of the voltage boosting circuit can be connected in parallel to form a group, control ends of each group of power tubes are connected in parallel to form an independent control end, and the power supply circuit can be three-phase or single-phase. The active power factor control-driven circuit is composed of an active power factor control circuit, a frequency divider and a drive circuit. The active power factor correction of the utility model can be extended to relatively large power and the utility model has the advantages of high power factor, no current equalization control, simple control circuit, low cost, small size and good output characteristic.
Description
The utility model relates to a kind of high frequency electric source conversion equipment, especially a kind of multi-channel parallelly connected step-up type power factor corrector.
On pulse modulation technology, the high frequency electric source switch technology that grows up has improved the inversion frequency of power supply greatly, has dwindled the volume of power supply, alleviates to draw middle sense in the coming year, has lowered energy consumption, has saved material.But existing high-frequency pulsed width modulation The Application of Technology has caused the pollution of the higher harmonic current that is on the rise to electric power system, and the power factor of most of power electronic products has also been brought extra burden to electrical network simultaneously, has influenced power quality.The problem that suppresses harmonic wave, raising power factor has become the key subjects that power electronic technology faces, and is just receiving increasing concern.Regulation has all been made to the power factor of power electronic product and the restriction of harmonic components by many countries of China and world wide and international organization.
Because high-frequency pulsed width modulation power source conversion technology adopts capacitor filtering type rectification circuit mostly, it is pulse condition that input current is subjected to the influence of filter capacitor, power factor is low, the Harmonics of Input composition is big, forms a harmonic source, and electric power system is caused very big harm.In some different switching power circuit devices, as single-ended buck, boost type, positive activation type, inverse-excitation type, both-end semibridge system, full-bridge type etc.Present single-ended boost type circuit structure as shown in Figure 1, adopt of Active Power Factor Correction for this class circuit carried out Active Power Factor Correction more in the power electronic product of small-power (tens watts supreme kilowatt), promptly adopt the active power switch technology to make linearization of input of Switching Power Supply, by power factor correction control circuit electric current and commutating voltage in the inductance L are consistent, exchange input current and AC-input voltage maintenance same-phase thereby make.This class adopts the small-power Active Power Factor Correction Technology of boost type very ripe, is widely used in the low power power electronic product.But because this simple traditional boost type circuit arrangement is the boost type single-ended structure, therefore generally only being only applicable to tens watts of maximum supreme kilowatt of small-power electric power electronic products carries out Active Power Factor Correction, and range of application is very limited.Be realizing the Active Power Factor Correction of more powerful power electronic product, generally is that such modular power device is in parallel one by one, up to the needs that satisfy power, as distributed communication power supply etc.The parallel connection of a plurality of modules has not only increased volume, and need carry out sharing control to each module, therefore must need the complicated Control current of a cover to finish sharing control.Its bigger volume can't be applied on microminiaturization, the powerful product, for example product such as convertible frequency air-conditioner; And sharing control must increase cost, and circuit is also very complicated, and therefore up to the present, the power factor problem fails to solve always on the convertible frequency air-conditioner.And because convertible frequency air-conditioner good electricity-saving ability, and start characteristics such as fast and be widely used in some developed regions, its development trend is not only very swift and violent, and power is increasing., its power factor is lower, so loss is big, by being to follow power factor low for what give prominence to, Harmonics of Input is very big, and this situation is also just very big for the contamination hazard of electrical network.So not only limited the energy-conservation like this product of convertible frequency air-conditioner and used, and serious impact the quality of electrical network.
The purpose of this utility model is to provide a kind of multi-channel parallelly connected step-up type power factor corrector at the deficiency of prior art, its Active Power Factor Correction can expand to more high-power, the power factor height, and do not need sharing control, control circuit is simplified, cost is lower, and volume is less, and output harmonic wave is little, characteristic good.
The purpose of this utility model is achieved in that
A kind of multi-channel parallelly connected step-up type power factor corrector, it comprises by the power circuit input, connects rectifier bridge, rectification output is connected to inductance, diode, the output capacitance of serial connection; One of power tube terminates at the booster circuit of forming between inductance and the diode, another termination output capacitance of power tube; The power tube control end is connected to source power factor control Driver Circuit, and wherein said booster circuit is the above boost type circuit in parallel of two-way.
Described booster circuit can be each and forms the identical booster circuit of device.
Described booster circuit can be more than one the tunnel first parallel connection in groups, every group is relation in parallel again, the control end of every group power also is connected into and is independent control end, this control termination No. one drive circuit.
Described booster circuit can be attempted by in the soft boost switching circuit.
Described power circuit can be three-phase or single-phase, and every phase can and connect the same number of booster circuit.
Described active power factor control Driver Circuit connects frequency divider by the active power factor control circuit, and frequency divider connects drive circuit again and forms.
The output of described frequency divider can be consistent with the independent control terminal number of booster circuit power tube.
According to the technique scheme analysis as can be known, the utlity model has following advantage:
1, power output is big.The both-end booster circuit can provide 2 times of power outputs, and therefore the power output of same trifocal or N end formula can expand the range of application of Active Power Factor Correction in power electronic product greatly near 3 times or N times.
2, highly versatile.This multiway intersection phase shift booster circuit both can be applicable to the Active Power Factor Correction of single phase alternating current power supply, also can be applicable to the Active Power Factor Correction of three-phase alternating-current supply.Can realize different Active Power Factor Correction such as hard switching, soft switch.
3, volume is little, in the control sets, does not need current-sharing adjustment control.Not only cost reduces, and control circuit is simple, and the reliability height is applicable to various microminiaturizations, high-power product.
Below in conjunction with accompanying drawing and specific embodiments the utility model is described in further detail.
Fig. 1 is the electrical block diagram of prior art;
Fig. 2 is a kind of preferred embodiment circuit theory diagrams of the present utility model;
Fig. 3 is another kind of preferred embodiment circuit theory diagrams of the present utility model;
Fig. 4 is another preferred embodiment circuit theory diagrams of the present utility model;
Fig. 5 is the utility model each point voltage waveform view;
Fig. 6 is another preferred embodiment circuit theory diagrams of the present utility model;
Fig. 7 is the circuit structure diagram of the utility model active power correcting circuit;
Fig. 8 is the utility model active power correcting circuit frequency dividing circuit schematic diagram;
Fig. 9 is the oscillogram of the utility model active power correcting circuit frequency dividing circuit each point.
Basic thought of the present utility model is that the single-ended boost type circuit that will be used to be applied to Active Power Factor Correction is improved to the multi-channel parallelly connected step-up type circuit.The multi-channel parallelly connected step-up type circuit is the multiterminal topological structure, and just structure is that two-way composes in parallel both-end push-pull type boost type circuit, also can be three ends, four ends ... wait the multi-channel parallelly connected step-up type circuit.In the reality, the boost type circuit output of 2-4 end is used comparatively extensive.
Referring to Fig. 2, the utility model is the two-way parallelly connected step-up type power factor corrector, promptly forms both-end push-pull type boost type circuit.Compared with prior art, it is characterized in that booster circuit is the boost type circuit that the identical device of two-way is formed, and becomes both-end push-pull type boost type circuit after the parallel connection.Shown in the figure, by drive power tube T1, the T2 of 180 ° of two groups of phase phasic differences, make the two-way cross-conduction respectively.By regulating the duty ratio of drive signal, can in certain scope, regulate output voltage.As adopting the power tube of same capacity, its power output is 2 times of monofocal booster circuit.Its operation principle (referring to Fig. 5) is: booster circuit can be regarded as by the monofocal booster circuit of two-way input, output parallel connection and form.This two-way circuit is made up of power tube T1, inductance L 1, diode D1 and power tube T2, inductance L 2 and diode D2 respectively.Exchanging input AC waveform is waveform a, is waveform b through full-wave rectification, is voltage Vd, and Vd is added to the input of booster circuit.The Active Power Factor Correction control Driver Circuit provides drive signal Vgs1, the Vgs2 of 180 ° of two groups of phase phasic differences, and as waveform c, d, driving power pipe T1, T2 make the two-way cross-conduction respectively.Be respectively tube voltage drop Vds1, the Vds2 of T1, T2 shown in waveform e, the f.Waveform g is the voltage on the capacitor C d, is output voltage.As can be seen from Figure, different with existing monofocal booster circuit, booster circuit is to be formed by stacking for 180 ° by the waveform phase shift together of two completeness, and power output expands to 2 times of monofocal booster circuit.
Fig. 3 is the boost type circuit in groups in parallel earlier booster circuit that constitutes in parallel again.It constitutes two groups of booster circuits by the parallel connection in twos of two-way booster circuit, the control end of boost type circuit in groups in parallel connects together earlier, connect one jointly and drive output control, the circuit of relative like this and equal-wattage size, control mode is simple, the designs simplification of drive circuit, drive output reduces, and therefore not only realizes easily the reliability height at control circuit, and cost is lower, only needs to increase the driving capacity and gets final product.In the present embodiment, 180 ° of two groups drive signal Vg1, the phasic differences of Vg2 phase, difference driving power pipe T1, T2 and T3, T4, make the corresponding respectively two-way monofocal booster circuit two-way monofocal booster circuit cross-conduction corresponding respectively of power tube T1, T2 of two-way parallel connection with power tube T3, T4, its each point waveform is consistent with foregoing circuit, and power output can expand to original 4 times.As long as the driving capacity is enough, available same group of pulse signal of recommending drive corresponding 4 power tubes.
Fig. 4 is the boost circuit structure that has soft switch.Because in the boost type circuit of Active Power Factor Correction link, semiconductor device bears high voltage.Because the switching loss when opening is directly proportional with the output end voltage of switching device, so switching loss is comparatively serious.In addition, high voltage also makes the noise of switch increase, and the voltage of electromagnetic interference and switching device, the stress problem of electric current are given prominence to, and utilize soft construction of switch can overcome then quite a lot of problems preferably.
Fig. 6 is the circuit structure of three phase times for power circuit.The waveform of the each point of each corresponding phase booster circuit operation principle is consistent with above-mentioned circuit in the three-phase.Working mechanism and effect are also identical substantially with the foregoing circuit structure.
Parallelly connected step-up type circuit APFC is shown in Fig. 7,8.The active power factor control Driver Circuit connects frequency divider by the active power factor control circuit, and frequency divider connects drive circuit again and forms.The output of frequency divider can be consistent with the independent control terminal number of booster circuit power tube.Present embodiment is a two-divider, and its output connects the two-way drive circuit, and the output Vg1 of drive circuit, 180 ° of difference of Vg2 phase difference driving power pipe T1, T2 make power tube T1, T2 cross-conduction respectively.The active power factor control circuit can adopt UC3854, MC34261, ML4812, TDA4814, CS3810 etc.
In addition, the each point waveform of corresponding frequency-halving circuit can be referring to shown in Figure 9.
Claims (7)
1, a kind of multi-channel parallelly connected step-up type power factor corrector, it comprises by the power circuit input, connects rectifier bridge, rectification output is connected to inductance, diode, the output capacitance of serial connection; One of power tube terminates at the booster circuit of forming between inductance and the diode, another termination output capacitance of power tube; The power tube control end is connected to source power factor control Driver Circuit, it is characterized in that: described booster circuit is the above boost type circuit in parallel of two-way.
2, multi-channel parallelly connected step-up type power factor corrector according to claim 1 is characterized in that: described booster circuit can be each and forms the identical booster circuit of device.
3, multi-channel parallelly connected step-up type power factor corrector according to claim 1, it is characterized in that: described booster circuit can be more than one the tunnel first parallel connection in groups, every group is relation in parallel again, and the control end of every group power also is connected into and is independent control end, this control termination No. one drive circuit.
4, multi-channel parallelly connected step-up type power factor corrector according to claim 1 is characterized in that: described booster circuit can be attempted by in the soft boost switching circuit.
5, multi-channel parallelly connected step-up type power factor corrector according to claim 1 is characterized in that: described power circuit can be three-phase or single-phase, and every phase can and connect the same number of booster circuit.
6, multi-channel parallelly connected step-up type power factor corrector according to claim 1 is characterized in that: described active power factor control Driver Circuit connects frequency divider by the active power factor control circuit, and frequency divider connects drive circuit again and forms.
7, according to claim 3 or 6 described multi-channel parallelly connected step-up type power factor correctors, it is characterized in that: the output of described frequency divider can be consistent with the independent control terminal number of booster circuit power tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00257426 CN2468222Y (en) | 2000-11-02 | 2000-11-02 | Multi-channel parallel boost type power-factor correcting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00257426 CN2468222Y (en) | 2000-11-02 | 2000-11-02 | Multi-channel parallel boost type power-factor correcting apparatus |
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| CN2468222Y true CN2468222Y (en) | 2001-12-26 |
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| CN 00257426 Expired - Fee Related CN2468222Y (en) | 2000-11-02 | 2000-11-02 | Multi-channel parallel boost type power-factor correcting apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036433A (en) * | 2012-12-12 | 2013-04-10 | 北京动力机械研究所 | Control method of two-way direct current conversion device |
-
2000
- 2000-11-02 CN CN 00257426 patent/CN2468222Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036433A (en) * | 2012-12-12 | 2013-04-10 | 北京动力机械研究所 | Control method of two-way direct current conversion device |
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| 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 |