CN203691227U - Big-power three-phase active power correction circuit - Google Patents
Big-power three-phase active power correction circuit Download PDFInfo
- Publication number
- CN203691227U CN203691227U CN201320884464.4U CN201320884464U CN203691227U CN 203691227 U CN203691227 U CN 203691227U CN 201320884464 U CN201320884464 U CN 201320884464U CN 203691227 U CN203691227 U CN 203691227U
- Authority
- CN
- China
- Prior art keywords
- phase
- point
- rectifier bridge
- output
- detects
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
Abstract
The utility model discloses a big-power three-phase active power correction circuit, which comprises a three-phase uncontrolled rectifier bridge which comprises totally six VD devices from VD1 to VD 6, the input end of the three-phase uncontrolled rectifier bridge is respectively connected to AC 380 V three-phase AC currents correspondingly, the positive pole of the three-phase uncontrolled rectifier bridge is connected to an inductance L, one channel of the inductance L is connected to the negative pole of the three-phase uncontrolled rectifier bridge by a switch tube S, the other channel of the inductance L passes through a diode D and a capacitor C in order to be connected to the negative pole of the three-phase uncontrolled rectifier bridge, and the capacitor C is connected with additional loads in parallel. With the circuit structure in the utility model, the power factor of equipment at a three-phase big power occasion is ensured to reach more than 0.93, network access requirements are satisfied, the circuit structure is simple and has high reliability, and control can be realized easily.
Description
Technical field
The utility model belongs to power electronic equipment technical field, for the industrial large-power occasions of required power factor correcting, is specifically related to a kind of high power three-phase active power correcting circuit.
Background technology
Power factor correction (Power Factor Correction, PFC) technology can solve the problems such as traditional rectifying installation Harmonics of Input content is high, power factor is lower.The electric equipment of industrial occasions high-power (general more than several kilowatts), the input of main employing three phase supply, traditional high-power electrical equipment is directly used in rear class load after with diode or thyristor rectifier filtering, produces a large amount of harmonic waves, can not meet networking requirement.Take modern power electronics technology as basic three-phase active power factor alignment technique, (Active Power Factor Correction, APFC) applied more and more widely for this reason.
Three-phase APFC main circuit topology mainly can be divided into triphase single-switch, three-phase three switches and three-phase six switches etc.Triphase single-switch power factor correcting circuit, because circuit is simple, switching device is few and low cost and other advantages, has important actual application value in industrial occasions.What triphase single-switch Active Power Factor Correction mainly adopted at present is to proofread and correct based on the three-phase active power factor under BOOST discontinous mode (DCM).
Be that CN00136053.1 name is called in " triphase single-switch Active PFC booster converter " in the patent No., proposed a kind of triphase single-switch power factor correcting step-up converter.This power factor correction structure can make power factor meet harmonic standard, but its inductive current is operated in discontinuous mode (DCM), and magnetic core utilance is low, and the power of converter can only reach 5kW, and inverter power is restricted.
In paper " High Power Factor Three-phase Single-transistor Boost pfc converter ", a kind of Three-phase Single-transistor Boost pfc converter is proposed.This Boost pfc converter has adopted a kind of new variable duty cycle control method, has reduced Harmonics of Input, and power factor approaches unity power factor, but it is still operated in DCM, is only applicable to middle low power applications.
And triphase single-switch APFC is operated under continuous current mode (CCM) and yet there are no relevant report.Although the correlation technique being operated under continuous current mode at single-phase single switch APFC has had more application, single-phase APFC is easy to realize the APFC under CCM pattern, but there is Coupling Between Phases relation between the three-phase input due to three-phase APFC, make to control complexity, three-phase APFC technology has run into new control difficulty and complexity.
The single-phase APFC of CCM pattern is applied to three-phase APFC, and the scheme having occurred has three single-phase, accurate three-phases.Three single-phase schemes are that three single-phase schemes are simple and practical, function admirable by three three-phase APFC power supplys of single-phase APFC power supply composition of CCM pattern completely independently, but the cost of three single-phase schemes is higher, components and parts are more.Accurate three-phase scheme is that a preposition accurate three-phase APFC adds a rearmounted DC/DC, wherein accurate three-phase APFC is combined by the single-phase APFC of three independent CCM patterns, rearmounted DC/DC only has one, it is few that standard three is compared three single-phase scheme components and parts, but accurate three-phase scheme exists Coupling Between Phases, power factor correction is not as three single-phase schemes.So above-mentioned structure is at single-phase APFC and the triphase single-switch APFC of CCM pattern, still can not meets and when converter power factor reaches networking standard, be applicable to powerful requirement.
Utility model content
The purpose of this utility model is to provide a kind of high power three-phase active power correcting circuit, solve single-phase APFC and the triphase single-switch APFC of existing structure in CCM pattern, all can not meet the problem that is applicable to powerful requirement when converter power factor reaches networking standard.
The technical scheme that the utility model adopts is,. a kind of high power three-phase active power correcting circuit, comprise that three-phase do not control rectifier bridge, three-phase does not control rectifier bridge input and AC380V three-phase alternating current is connected respectively, the positive pole that three-phase is not controlled rectifier bridge is connected with inductance L, inductance L is leaded up to the negative pole that switching tube S do not control rectifier bridge with three-phase and is connected, and the negative pole that another road of inductance L is not controlled rectifier bridge with capacitor C with three-phase by diode D is successively connected, and capacitor C is parallel with load in addition.
High power three-phase active power correcting circuit of the present utility model, its feature is also:
Three-phase is not controlled cathode rectifier output and is called X point, node between diode D and capacitor C is called Y point, three-phase is not controlled rectifier bridge cathode output end and is called Z point, Z point is connected with earth terminal by after resistance R, overall structure is, X point detects input with detection at zero point and peak value simultaneously and is connected, and the output that the output detecting zero point detects with peak value is connected with waveform generation simultaneously, and waveform generates and is connected with control unit first input end; Y point detects and is connected with output voltage, and output voltage detection hinders filtering by point and is connected with control unit the second input; Z point detects and is connected with inductive current, and inductive current detects and is connected with control unit the 3rd input by filtration module, and control unit output is connected with driver module, and the output of driver module is connected with switching tube S.
The beneficial effects of the utility model are, adopt triphase single-switch power factor correcting step-up converter, and with respect to the many switch power factor correcting step-up converters of three-phase, this topological structure hardware circuit is simple, control flexibly, cost is lower; Booster converter is operated in CCM pattern, with respect to the converter that is operated in DCM pattern, can make power factor reach more than 0.93 after power factor correction, meets the networking requirement of industrial powerful device.
Accompanying drawing explanation
Fig. 1 is APFC basic circuit structure schematic diagram of the present utility model;
Fig. 2 is APFC embodiment electrical block diagram of the present utility model;
Fig. 3 is APFC internal control process schematic diagram of the present utility model;
Fig. 4 is the inductive current wavy curve of the APFC circuit of the utility model device;
Fig. 5 is the power factor curve of the utility model device under different loads condition.
In figure, 1. detect zero point, 2. waveform generates, and 3. peak value detects, 4. control unit, and 5. driver module, 6. output voltage detects, a 7. resistance filtering, 8. inductive current detects, 9. filtration module, 10. load.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
With reference to Fig. 1, for APFC basic circuit schematic diagram of the present utility model, its structure is, comprise that three-phase do not control rectifier bridge, three-phase is not controlled rectifier bridge and is comprised VD1～VD6 six VD devices altogether, three-phase does not control rectifier bridge input and AC380V three-phase alternating current is connected respectively, the positive pole that three-phase is not controlled rectifier bridge is connected with inductance L, inductance L is leaded up to the negative pole that switching tube S do not control rectifier bridge with three-phase and is connected, the negative pole that another road of inductance L is not controlled rectifier bridge with capacitor C with three-phase by diode D is successively connected, and capacitor C is parallel with load 10 in addition.
With reference to Fig. 2, it is the example structure block diagram (being the structured flowchart of APFC unit in dotted line frame) that has increased APFC unit on the basis of Fig. 1, three-phase is not controlled cathode rectifier output and is called X point, node between diode D and capacitor C is called Y point, three-phase is not controlled rectifier bridge cathode output end and is called Z point, Z point is connected with earth terminal by after resistance R, overall structure is, X point simultaneously with detect zero point 1 with two modules of peak value detection 3() input is connected, detecting 1 output and peak value zero point detects 3 output and generates (module) 2 with waveform simultaneously and be connected, waveform generates (module) 2 and is connected with control unit 4 first input ends, Y point detects (module) 6 with output voltage and is connected, and output voltage detection 6 hinders filtering (module) 7 by point and is connected with control unit 4 second inputs, Z point detects (module) 8 with inductive current and is connected, and inductive current detects 8 and is connected with control unit 4 the 3rd input by filtration module 9, and control unit 4 outputs are connected with driver module 5, and the output of driver module 5 is connected with switching tube S.
Detect zero point, for detection of the zero point of rectifier bridge output voltage;
Peak value detects, for detection of the peak value of rectifier bridge output voltage;
Waveform generates, and generates rectifier bridge output voltage waveforms for the feature that adds rectifier bridge output voltage waveforms according to the zero point, the peak point that detect;
Output voltage detects, for detection of Boost output voltage;
Inductive current detects, for detection of load current;
Control unit, DSP adopts the Double closed-loop of voltage and current of band feedforward under Average Current Control mode.
Device of the present utility model is applicable to the power factor correction of Three-phase high-power application scenario, wherein circuit of power factor correction adopts triphase single-switch booster converter, booster converter is operated in continuous mode (Continuous Conduction Mode, CCM).By detecting zero point and the peak point at three phase rectifier output voltage (the X point in figure), according to the zero point detecting and peak point, utilize the feature of three phase rectifier output voltage waveforms to generate the waveform of three phase rectifier output voltage, the waveform of generation is delivered to control unit (DSP) and is carried out computing.This mode input voltage of need not sampling continuously as traditional Active PFC control circuit, only need to detect zero point and the peak point of APFC correcting circuit input voltage.
Sampling Boost output voltage (Y point voltage in Fig. 2), Y point voltage is processed through A/D, through some resistance filtering, sends into control unit (DSP) and carries out computing.Point resistance filtering can filtering enters the voltage ripple of feedback loop, near harmonic wave point resistance filtering rejection frequency 100Hz, and some resistance filter wave frequency is made as the twice of filter input signal frequency.
Sampling inductive current, the electric current that in Fig. 2, Z is ordered is inductive current, and it converts by A/D and filtering is sent to control unit (DSP).
According to the rectifier output voltage of foregoing generation, Boost output voltage and inductive current, DSP adopts the Double closed-loop of voltage and current duty ratio with band feedforward under Average Current Control mode.Boost output voltage u
oafter sampling network, with given voltage V
refafter comparing, be input in multiplier through voltage regulator AVR, then after doing computing with electric voltage feed forward signal and rectifier bridge output voltage sampled signal in multiplier, given by multiplier output as current inner loop, then inductive current is compared through current sample network and current inner loop are given, this error is modulated and is obtained PWM ripple after current regulator ACR, by regulating the size of duty ratio, make i
inwaveform is followed u
inwaveform, thus reach the object of power factor correction.
With reference to Fig. 3, be APFC control procedure schematic diagram of the present utility model, it is the control procedure schematic diagram of APFC unit in Fig. 2, control procedure is, given voltage V
refwith Boost output voltage u
ocompare, error is sent into AVR(voltage regulator), regulate and send into M(multiplier through AVR), then with electric voltage feed forward signal and V
inafter (rectifier bridge output voltage) sampled signal is done computing in multiplier, given by multiplier output as current inner loop, then compares given to inductive current and current inner loop, and this error is through ACR(current regulator) after modulate and obtain PWM ripple;
Y point voltage (Boost output voltage) is after sample circuit sampling, some resistance filtering, with given voltage V
refcompare, obtain difference V
errbe input to multiplier (M) through voltage regulator (AVR), the voltage then generating with the point of zero voltage detecting according to X point, peak point and rectifier bridge output voltage waveforms feature does computing multiplier (M) is inner.The normal phase input end of multiplier output access electric current loop, given as current inner loop, negative-phase input by Z point electric current (inductive current) through current sample network insertion electric current loop, compare with current inner loop is given, this error signal is modulated and is connected to pulse-width modulation circuit after current regulator (ACR), the modulation of passages through which vital energy circulates stretch circuit obtains PWM ripple, by the size of regulating frequency and duty ratio, makes i
inwaveform is followed u
inwaveform, thus reach the object of power factor (PF).DSP is according to switching frequency and the duty ratio of the Double closed-loop of voltage and current rated output pipe of band feedforward under Average Current Control mode.Wherein, take voltage as outer shroud, regulated output voltage, outer voltage is emphasized anti-stability and perturbation; Take electric current as interior ring, guarantee that input current is and input voltage same-phase that current inner loop is emphasized followability, makes i
infollow u
in.
Embodiment
Three-phase active power factor correction circuit of the present utility model is applied to the high power contravariant welding/cutting power supply of a 16kW.As seen from Figure 4, adopt three-phase active power factor correcting circuit of the present utility model to realize inductive current and follow input voltage waveform, and the THD(Total Harmonic Distortion of input current) and peak value less, use power quality analyzer to test power supply, obtained the unequally loaded power factor waveform shown in Fig. 5.As seen from Figure 5, adopt three-phase active power factor correcting circuit of the present utility model, the power factor of power supply is greater than 0.93, meets the networking standard of equipment.
In sum, circuit of the present utility model adopts triphase single-switch power factor correcting step-up converter, and with respect to the many switch power factor correcting step-up converters of three-phase, this topological structure hardware circuit is simple, control is flexible, cost is lower; Booster converter is operated in CCM pattern, with respect to the converter that is operated in DCM pattern, can meet the powerful requirement of industrial occasions.
Claims (2)
1. a high power three-phase active power correcting circuit, its feature is: comprise that three-phase do not control rectifier bridge, three-phase does not control rectifier bridge input and AC380V three-phase alternating current is connected respectively, the positive pole that three-phase is not controlled rectifier bridge is connected with inductance (L), inductance (L) is leaded up to the negative pole that switching tube (S) do not control rectifier bridge with three-phase and is connected, the negative pole that another road of inductance (L) is not controlled rectifier bridge with electric capacity (C) with three-phase by diode (D) is successively connected, and electric capacity (C) is parallel with load (10) in addition.
2. high power three-phase active power correcting circuit according to claim 1, its feature is: described three-phase is not controlled cathode rectifier output and is called X point, node between diode (D) and electric capacity (C) is called Y point, three-phase is not controlled rectifier bridge cathode output end and is called Z point, Z point is connected with earth terminal by after resistance (R), X point detects (3) input with detection at zero point (1) and peak value simultaneously and is connected, the output that detects (1) zero point is connected with waveform generation (2) with the output that peak value detects (3) simultaneously, waveform generates (2) and is connected with control unit (4) first input end, Y point detects (6) with output voltage and is connected, and output voltage detection (6) hinders filtering (7) by point and is connected with control unit (4) second inputs, Z point detects (8) with inductive current and is connected, inductive current detects (8) and is connected with control unit (4) the 3rd input by filtration module (9), control unit (4) output is connected with driver module (5), and the output of driver module (5) is connected with switching tube (S).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884464.4U CN203691227U (en) | 2013-12-30 | 2013-12-30 | Big-power three-phase active power correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320884464.4U CN203691227U (en) | 2013-12-30 | 2013-12-30 | Big-power three-phase active power correction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203691227U true CN203691227U (en) | 2014-07-02 |
Family
ID=51013083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320884464.4U Expired - Fee Related CN203691227U (en) | 2013-12-30 | 2013-12-30 | Big-power three-phase active power correction circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203691227U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856370A (en) * | 2015-12-09 | 2017-06-16 | 罗姆股份有限公司 | Switching regulator |
| CN107070230A (en) * | 2016-12-29 | 2017-08-18 | 上海嘉洲环保机电设备有限责任公司 | A kind of three-phase 380V inputs High Power Factor high pressure purge supply unit peculiar to vessel |
-
2013
- 2013-12-30 CN CN201320884464.4U patent/CN203691227U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856370A (en) * | 2015-12-09 | 2017-06-16 | 罗姆股份有限公司 | Switching regulator |
| CN106856370B (en) * | 2015-12-09 | 2020-02-21 | 罗姆股份有限公司 | Switching regulator |
| CN107070230A (en) * | 2016-12-29 | 2017-08-18 | 上海嘉洲环保机电设备有限责任公司 | A kind of three-phase 380V inputs High Power Factor high pressure purge supply unit peculiar to vessel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109194113B (en) | Power factor corrector with active power decoupling function and control method thereof | |
| CN102025145B (en) | Bidirectional chopper-based direct current active power filter and control method thereof | |
| CN103887955A (en) | Grid-connected inverter for low-frequency current ripple output restraining of fuel cell and control device | |
| CN103401267A (en) | Grid-connected circuit for small-sized wind-driven generator | |
| CN102427293A (en) | Low output ripple wave parallel power-factor correction (PFC) transform control method and device | |
| CN105553249A (en) | Current injection type three-phase power factor correction circuit having wide voltage range and low voltage stress | |
| CN115051565A (en) | Bidirectional half-bridge direct-current converter grid-connected inverter and ripple wave control method | |
| CN107196491A (en) | A kind of pair of buck combining inverter half periods current distortion suppression system and its method | |
| CN102780409B (en) | Unity-power-factor buck-boost circuit | |
| CN111431394A (en) | Novel step-down single-phase three-level bridgeless PFC converter system | |
| CN113489308B (en) | Step-down power factor correction converter without input current dead zone and control method | |
| CN102025146B (en) | Double-switch direct current active power filter and control method thereof | |
| CN203691227U (en) | Big-power three-phase active power correction circuit | |
| CN102769394B (en) | Single-phase controllable rectification circuit | |
| Baharom et al. | Computer simulation model and performance analysis of high power factor three-phase AC-DC current injection hybrid resonant converter | |
| CN116961400A (en) | High-efficiency bridgeless buck PFC converter without input diode | |
| Kwak et al. | Current-source-rectifier topologies for sinusoidal supply current: Theoretical studies and analyses | |
| CN116317499A (en) | Single-phase inverter based on flying capacitor type three-level boost and control method | |
| CN113890406A (en) | Bridgeless single-stage isolation AC-DC converter and control method thereof | |
| CN213027802U (en) | Decoupling circuit | |
| CN115378286A (en) | Three-phase three-level converter circuit and modulation method thereof | |
| CN114244108A (en) | Bandwidth dynamic adjustment Boost-PFC control circuit and control method thereof | |
| Mude | Single-Phase Controlled Rectifiers | |
| Sayed et al. | DC-DC converter with three-phase power factor correction for arc welder | |
| CN202444413U (en) | Parallel connection power factor correction converter with low output ripple |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20161230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |