CN102437752A - Grading limiting circuit for aerospace alternative-current/direct-current (AC/DC) converter - Google Patents
Grading limiting circuit for aerospace alternative-current/direct-current (AC/DC) converter Download PDFInfo
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- CN102437752A CN102437752A CN201010299127XA CN201010299127A CN102437752A CN 102437752 A CN102437752 A CN 102437752A CN 201010299127X A CN201010299127X A CN 201010299127XA CN 201010299127 A CN201010299127 A CN 201010299127A CN 102437752 A CN102437752 A CN 102437752A
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention relates to a grading limiting circuit for an aerospace alternative-current/direct-current (AC/DC) converter, which is characterized by comprising a power part and a control part, wherein the power part comprises an input filter unit, a power factor correction (PFC) conversion circuit unit, a high-frequency isolation DC/DC conversion circuit unit and an auxiliary power supply unit; and the control part comprises a PFC conversion controller unit, an input power supply voltage detection circuit unit, a DC/DC limiting point setting circuit unit and a DC/DC control unit. The input filter unit is arranged at a first stage, so the interference of the power supply can be reduced after the inputted AC power supply is filtered. The AC power supply after being filtered is converted by the PFC conversion circuit unit into 410V DC power supply to be outputted, waveform of the inputted current is maintained to be consistent with the waveform of the voltage of the power supply, so the input power factor is approximate to 1. The 410V DC voltage is converted to a power supply voltage (28V or 57V) required by a load through the high-frequency isolation DC/DC conversion circuit unit.
Description
Technical field
The present invention relates to a kind of converting means that can be used for the ac/dc of two kinds of high-voltage alternating inputs, particularly a kind of high-voltage alternating/dc converter that is used for aerospace field.
Background technology
The ac/dc converting means is widely used in aerospace field.The power supply that the Aero-Space power supply is commonly used is alternating current 220V/50Hz and 115V/400Hz, and need be transformed into output voltage is direct current 28V or direct current 57V (power is 3KW's), in practice, has the switching of two kinds of input power supplys.The characteristics of this power supply are that input and output electrical isolation and output dc voltage are far below input ac voltage.Common circuit design structure has: 1, through carrying out rectifying and voltage-stabilizing after power frequency/intermediate frequency transformer step-down, and 2, rectification circuit and DC-DC high-frequency isolation voltage conversion circuit.The major defect that exists is: scheme 1 needs the circuit of special to match for adapting to different input supply voltages, and through commutation circuit control, complicated circuit, wide in variety, volume is big, cost is high, reliability is low.Scheme 2 is for reducing the harmonic current that rectification circuit produces, and when power output during greater than the power output of rectifier power source, unfavorable to power supply as then can produce current harmonics in first order current limliting, the circuit design difficulty is big, and is prone to produce Harmonic Interference.Scheme 2 adopts traditional design, and under rectifier power source power output the same terms, input voltage is that to be about input voltage be two times of 220V/50Hz to the input current of 115V/400Hz.By input voltage is that the power that 115V/400Hz can export carries out output current limiting, and this strategy does not make full use of the output potentiality that input voltage is 220V/50Hz.Under the situation of more high-power demand, need more power supply parallel connection to solve.
If AC-dc converter can be suitable for above two kinds of power supplys simultaneously; Can realize that rectifier power source can be respectively normally operation under 220V/50Hz and the 115V/400Hz situation at input voltage, guarantee simultaneously when different input voltage, can reach maximum power output; The scope of application of expand cooperative exchanges/DC converter; Can reduce the supply convertor kind, reduce cost, simplify the maintenance support requirement.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art; A kind of compatibling problem of ac/dc converting means to two kinds of communication power supplies that be used to solve is provided; Can guarantee that rectifier power source can normally move under two kinds of different input voltages, can make converter when two kinds of power supply inputs, export the classification current-limiting circuit that is used for the Aero-Space AC/DC transfer of its maximum exportable power again.
According to the classification current-limiting circuit that is used for the Aero-Space AC/DC transfer provided by the invention; Comprise power section and control section, said power section comprises input filter unit, PFC inverter unit, high-frequency isolation DC/DC inverter unit, accessory power supply unit; Control section comprises that PFC transform controller unit, input supply voltage testing circuit unit, DC/DC current-limiting points are provided with circuit unit, DC/DC control unit; The input of the said input filter unit of output termination of input ac power; The input of said PFC inverter unit of the output termination of said input filter unit and said input supply voltage testing circuit unit; The input of said high-frequency isolation DC/DC inverter unit of the output termination of said PFC inverter unit and accessory power supply unit; The said PFC transform controller of output termination unit, DC/DC control unit, input supply voltage testing circuit unit and the DC/DC current-limiting points of said accessory power supply unit is provided with the input of circuit unit; Another input of the said PFC inverter unit of output termination of said PFC transform controller unit; The said DC/DC current-limiting points of output termination of said input supply voltage testing circuit unit is provided with another input of circuit unit; Said DC/DC current-limiting points is provided with another input of the said DC/DC control unit of output termination of circuit unit; Another input of the said high-frequency isolation DC/DC inverter unit of output termination of said DC/DC control unit, said high-frequency isolation DC/DC inverter unit is output as the output of DC power supply.
Also have following attached technical characterictic according to a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer provided by the invention:
The differential mode inductance filter circuit is partly adopted in said input filtering, and said input filtering part is carried out Filtering Processing to input ac power.
Said PFC inverter unit comprises rectifier bridge and boost booster circuit; Said rectifier bridge carries out halfwave rectifier to AC supply voltage; Said boost booster circuit is the voltage transformation after the rectification DC bus-bar voltage through high-frequency PWM control again; Voltage waveform after the waveform of controlling inductive current simultaneously and the rectification is consistent, and the switching tube in the said boost booster circuit adopts harmless soft its make-and-break voltage of switch control.
Said boost booster circuit is made up of the main limit of switching tube VT7 and inductance L 3, and the secondary of said inductance L 3 and inductance L 4, capacitor C 17, capacitor C 18 constitute resonant circuit, and said resonant circuit makes opening of said switching tube or turn-offs under soft switch condition and accomplish.
Also comprise the MOSFET voltage clamping circuit of being made up of diode VD33, capacitor C 45, resistance R 54, said MOSFET voltage clamping circuit is connected the output of said boost booster circuit.
Said PFC transform controller unit is made up of UC3854 and peripheral circuit thereof, and said PFC transform controller unit adopts the dicyclo control mode of outer voltage, current inner loop to control the work of said PFC inverter unit.
Said high-frequency isolation DC/DC inverter unit adopts the integrated phase whole-bridging circuit of magnetic; It comprises four-quadrant full-bridge, high-frequency isolation transformer T2, halfwave rectifier, filter inductance, filter capacitor C34 resonant inductance L 5 compositions, and said filter inductance and said high-frequency isolation transformer T2 are integrated on the magnet.
Said DC/DC control circuit is made up of chip UC3895 and peripheral circuit thereof, and said DC/DC control circuit adopts the dicyclo control of interior ring of peak current and outer voltage that the output voltage of said high-frequency isolation DC/DC inverter unit is controlled.
Said input supply voltage testing circuit unit detects the AC power of input; Said DC/DC current-limiting points is provided with circuit unit and according to the detection output of importing said voltage detection circuit unit current-limiting points is provided with; Said DC/DC control unit is provided with situation according to the current-limiting points that said DC/DC current-limiting points is provided with circuit unit; Said high-frequency isolation DC/DC inverter unit is controlled; Said high-frequency isolation DC/DC inverter unit converts the direct voltage of importing into load required DC power supply under the control of said DC/DC control unit.
Compared with prior art have following advantage according to a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer provided by the invention:
1, the present invention is provided with the input filter unit in the first order, and input ac power reduces the interference of power supply through after importing filtering.
2, the AC power after the Filtering Processing becomes the output of 410V direct current through the PFC inverter unit, and the voltage waveform phase place of input current waveform and power supply is consistent, thereby makes input power factor near 1.High-frequency isolation DC/DC inverter unit is the required supply power voltage of load (28V or 57V) with the dc voltage conversion of 410V.
3, the accessory power supply unit converts the direct voltage of 410V into multiple power supplies, is respectively control circuit (the DC/DC current-limiting points is provided with circuit unit, DC/DC control unit, input supply voltage testing circuit unit) power supply is provided.
4, input supply voltage testing circuit unit carries out voltage detecting to the input power supply; Detect output is provided with circuit unit as the DC/DC current-limiting points input; The DC/DC current-limiting points is provided with circuit unit and according to the different situations of importing power supply is provided with different current-limiting points, and the DC/DC control unit limits according to the power output of different current-limiting points to power supply.
5, the present invention is applicable to the input of two kinds of AC powers, reduces the Harmonic Interference to the input power supply simultaneously, and can guarantee under every kind of AC power input condition, and power supply can full power output.
6, in the PFC main circuit, adopted harmless soft switch technique, reduced the high and bigger problem of switching loss that causes of switching frequency.
7, in full-bridge phase-shifted topology, adopted integrated magnetic, main transformer and two magnetic devices of direct current output inductor are integrated in the same magnet, and guarantee that the characteristic of two magnetic elements of control characteristic and tradition is consistent.
8, adopt voltage and current double closed-loop, realized respectively control of PFC busbar voltage and output voltage control.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is a filter circuit schematic diagram of the present invention.
Fig. 3 is PFC inverter unit circuit theory diagrams of the present invention.
Fig. 4 is a PFC transform controller element circuit schematic diagram of the present invention.
Fig. 5 is an accessory power supply element circuit schematic diagram of the present invention.
Fig. 6 is an input supply voltage testing circuit element circuit schematic diagram of the present invention.
Fig. 7 is that DC/DC current-limiting points of the present invention is provided with the circuit unit circuit theory diagrams.
Fig. 8 is a DC/DC control unit circuit schematic diagram of the present invention.
Fig. 9 is high-frequency isolation DC/DC inverter unit circuit theory diagrams of the present invention.
Embodiment
Referring to Fig. 1; According to a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer provided by the invention; Comprise power section and control section, said power section comprises input filter unit 1, PFC inverter unit 2, high-frequency isolation DC/DC inverter unit 3, accessory power supply unit 5; Control section comprises that PFC transform controller unit 4, input supply voltage testing circuit unit 7, DC/DC current-limiting points are provided with circuit unit 8, DC/DC control unit 6; The input of the said input filter unit 1 of output termination of input ac power; The input of said PFC inverter unit 2 of the output termination of said input filter unit 1 and said input supply voltage testing circuit unit 7; The input of said high-frequency isolation DC/DC inverter unit 3 of the output termination of said PFC inverter unit 2 and accessory power supply unit 5; The said PFC transform controller of output termination unit 4, DC/DC control unit 6, input supply voltage testing circuit unit 7 and the DC/DC current-limiting points of said accessory power supply unit 5 is provided with the input of circuit unit 8; Another input of the said PFC inverter unit 2 of output termination of said PFC transform controller unit 4; The said DC/DC current-limiting points of output termination of said input supply voltage testing circuit unit 7 is provided with another input of circuit unit 8; Said DC/DC current-limiting points is provided with another input of the said DC/DC control unit 6 of output termination of circuit unit 8; Another input of the said high-frequency isolation DC/DC inverter unit 3 of output termination of said DC/DC control unit 6, said high-frequency isolation DC/DC inverter unit 3 is output as the output of DC power supply.
Input ac power carries out Filtering Processing through input filter unit 1; PFC inverter unit 2 will be imported the alternating voltage of filter unit 1 output under the control of PFC transform controller unit 4; Be transformed to direct current 410V voltage; And the voltage waveform of input current waveform and power supply is consistent, thereby make input power factor near 1.The AC power of the 7 pairs of inputs in said input supply voltage testing circuit unit detects; Said DC/DC current-limiting points is provided with circuit unit 8 and according to the detection output of importing said voltage detection circuit unit 7 current-limiting points is provided with; Said DC/DC control unit 6 is provided with situation according to the current-limiting points that said DC/DC current-limiting points is provided with circuit unit 8; Said high-frequency isolation DC/DC inverter unit 3 is controlled; Said high-frequency isolation DC/DC inverter unit 3 converts the direct voltage of importing into load required DC power supply under the control of said DC/DC control unit 6.
Referring to Fig. 2, in the foregoing description that the present invention provides, said input filtering part 1 adopts the differential mode inductance filter circuit, and said input filtering part is carried out Filtering Processing to input ac power.The circuit theory diagrams that concrete formation provides referring to Fig. 2.The present invention adopts the first order to carry out filtering, thereby overcomes the influence of high order harmonic component for power supply.
Referring to Fig. 3, in the foregoing description that the present invention provides, said PFC inverter unit comprises rectifier bridge and boost booster circuit, and said rectifier bridge VD27 is GBPC35-10.Said boost booster circuit is a kind of switch DC booster circuit.Said rectifier bridge carries out halfwave rectifier to AC supply voltage; Said boost booster circuit is the voltage transformation after the rectification DC bus-bar voltage through high-frequency PWM control again; Voltage waveform after the waveform of controlling inductive current simultaneously and the rectification is consistent, and the switching tube in the said boost booster circuit adopts harmless soft its make-and-break voltage of switch control.Said boost booster circuit is made up of the main limit of switching tube VT7 and inductance L 3; The secondary of said inductance L 3 and inductance L 4, capacitor C 17, capacitor C 18 constitute resonant circuit; The magnitude of voltage of this resonant circuit control switch pipe VT7 when break-make levels off to zero; And give load, thereby realize the function of harmless soft switch circuit with unnecessary power delivery.The Boost circuit is to be operated in the HF switch state, and for reducing volume (mainly reducing the volume of inductance L 2 among the figure), the switching frequency of main circuit is high more good more.Because the reverse recovery time of switching tube and fly-wheel diode and nonideal switching device, particularly fly-wheel diode is longer.Be the volume and the Harmonics of Input that reduce inductance, the switching frequency of PFC reaches more than the 100kHz, adopts traditional hard switching main circuit, and switching loss is bigger, causes conversion efficiency to reduce, and needs bigger area of dissipation and increases equipment volume.Soft switch technique can reduce the high switching loss that high switching frequency brings.Adopt harmless soft switch technique to be used to reduce the switching loss of continuous switching tube and fly-wheel diode.
The composition and the operation principle of harmless soft switch circuit of the present invention are following:
Fig. 3 of the present invention is the circuit theory diagrams of PFC inverter unit 2, and what wherein be made up of diode VD33, capacitor C 45, resistance R 54 is the MOSFET voltage clamping circuit, and said MOSFET voltage clamping circuit is connected the output of said boost booster circuit.Only working as switch tube voltage just works greater than DC bus-bar voltage.When normal operation, the switching tube pressure drop is not more than DC bus-bar voltage.
Referring to Fig. 3, when switching tube VT7 conducting stable state, the main circuit path is rectifier bridge-inductance L 3-switching tube-rectifier bridge.
When switching tube VT7 turn-offs; Because the effect of diode VD12, capacitor C 18 (this moment, the voltage of capacitor C 18 was approximately zero); Voltage clamp when switching tube VT7 turn-offs is near zero, thereby the electric current of switching tube reduces that switch tube voltage remains near zero in the process when realizing turn-offing.Because the effect of inductance L 3, inductance is to capacitor C 18 continuous discharges, and its current path is rectifier bridge-inductance L 3-diode VD12-capacitor C 18-rectifier bridge.
Along with capacitor C 18 continues charging; Its voltage increases gradually; Surpass busbar voltage up to inductance L 3 secondary voltages, C17 voltage and C18 voltage sum; Its current path is that rectifier bridge-inductance L 3-inductance L 3 secondary-inductance L 4-capacitor C 17-diode VD10-capacitor C 38-rectifier bridge is one the tunnel, and rectifier bridge-inductance L 3-VD12-capacitor C 18-rectifier bridge is another road.This moment, the electric current of inductance L 4 increased gradually, and the voltage that the voltage of capacitor C 18 continues rising, capacitor C 17 continues down to.
When the voltage of capacitor C 18 reaches busbar voltage; Diode VD14 conducting; Switching tube VT7 voltage clamp is arrived busbar voltage; Its current path rectifier bridge-inductance L 3-inductance L 3 secondary-inductance L 4-capacitor C 17-diode VD10-capacitor C 39-rectifier bridge is one the tunnel, and rectifier bridge-inductance L 3-diode VD14-capacitor C 39-rectifier bridge is another road.
Because the effect of inductance L 3, make the voltage of inductance L 4 for just, the electric current of inductance L 4 continues increase gradually, up to diode VD14 by.Along with the voltage continuation decline of capacitor C 17, when capacitance voltage is 0, diode VD24 conducting.The current path of whole main circuit is rectifier bridge-inductance L 3-inductance L 3 secondary-inductance L 4-diode VD24-capacitor C 39-rectifier bridge.Inferior steady operation mode when turn-offing for switching tube.
When switching tube VT7 is transferred to when opening by shutoff, because the existence of inductance L 4, switching tube VT7 can realize that accurate no-voltage is open-minded.Electric current on the inductance L 4 is transferred on the switching tube VT7 gradually at this moment.Its current path is that rectifier bridge-inductance L 3-inductance L 3 secondary-inductance L 4-diode VD24-capacitor C 39-rectifier bridge is one the tunnel, and rectifier bridge-inductance L 3-switching tube VT7-rectifier bridge is another road.
When the electric current of inductance L 4 is reduced to zero; Owing to turn-off constantly at switching tube, capacitor C 18 electric energy stored are through the secondary of diode VD17, capacitor C 17, switching tube VT7, inductance L 3 and the loop of inductance L 4 formation; The current reversal of inductance L 4 increases; Its current path is that rectifier bridge-inductance L 3-switching tube VT7-rectifier bridge is one the tunnel, and 3 secondary-inductance L 3 is another road to capacitor C 18-diode VD11-capacitor C 17-inductance L 4-inductance L, and this road is connected in the two ends of switching tube VT7.In this stage, because inductance L 4 and two capacitor C 18, the resonance of C17 and the negative voltage of inductance L 3 secondary make that the voltage on the capacitor C 18 will be zero, simultaneously on the capacitor C 17 of its charge stored transfer.
The voltage of capacitor C 18 is zero, then realizes that for next switching tube turn-offs soft switch lays the first stone.The energy of capacitor C 17 storages is transferred in the load in above-mentioned path.
Can know by above-mentioned analysis: open at switching tube, blocking interval; The switching loss of switching tube is very little, has realized soft switch, and soft switch auxiliary network is transferred to the energy that switch absorbs in the load fully; Be not to consume in soft switching network, thereby realized the effect of harmless soft switch.
Referring to Fig. 4; In the foregoing description that the present invention provides; Said PFC transform controller unit is made up of UC3854 and peripheral circuit thereof, and said PFC transform controller unit adopts the dicyclo control mode of outer voltage, current inner loop to control the work of said PFC inverter unit.The effect of current inner loop is that control input current (inductance L 3 electric currents) makes it to be given reference current.Adopt the current controller of accurate PI controller as current inner loop, it is convenient that PI control realizes, can realize the floating of direct current signal is followed the tracks of, and has the better dynamic characteristic.Outer voltage control is output as the reference current effective value of current inner loop.The composition of said PFC transform controller unit is made up of circuit theory diagrams shown in Figure 4, its output with PFC inverter unit 2 in switching tube VT7 be connected the break-make of control switch pipe VT7.
Referring to Fig. 5, in the foregoing description that the present invention provides, Fig. 5 provides the composition of accessory power supply unit 5, and this circuit is that above-mentioned each circuit provides working power.Through transformer multiple voltage can be provided.
Referring to Fig. 6, in the foregoing description that the present invention provides, Fig. 6 provides the composition of input supply voltage testing circuit unit 7, and this circuit mainly is to be used to detect input ac power, and the foundation of judgement is set as current-limiting points.This circuit mainly is the sampling processing circuit.What Fig. 7 provided is the composition that the DC/DC current-limiting points is provided with circuit unit 8, and this circuit is provided with corresponding current-limiting points according to input voltage power sense circuit unit 7 detected input power supplys, thereby can be suitable for different input ac powers.
Referring to Fig. 9; In the foregoing description that the present invention provides; Said high-frequency isolation DC/DC inverter unit adopts the integrated phase whole-bridging circuit of magnetic; It comprises the four-quadrant full-bridge,, high-frequency isolation transformer T2, halfwave rectifier VD26, VD34, filter inductance, filter capacitor C34 resonant inductance L 5 form, said filter inductance and said high-frequency isolation transformer T2 are integrated on the magnet.Said four-quadrant full-bridge is made up of VT1, VT2, VT3, VT4.Filter inductance among the present invention is a dc inductance, in order to reduce current harmonics.Filter inductance is for reduce current harmonics as far as possible; Then need bigger inductance value; The electric current of inductance of flowing through simultaneously is unidirectional direct current, and size of current is a load current, and above factor causes the magnet volume of inductance big; And the present invention is integrated into a magnet with inductance and transformer, has then reduced volume greatly.
Referring to Fig. 8; In the foregoing description that the present invention provides; What Fig. 8 provided is the composition of DC/DC control circuit; Said DC/DC control circuit is made up of chip UC3895 and peripheral circuit thereof, and said DC/DC control circuit adopts the dicyclo control of interior ring of peak current and outer voltage that the output voltage of said high-frequency isolation DC/DC inverter unit is controlled.The transient current of ring employing phase-shifting full-bridge is a feedback parameters in the peak current.When transient current during less than the given reference current of outer voltage output, phase-shifting full-bridge output ' 1 ', this moment, output current increased always, up to transient current greater than with reference to given electric current the time, phase-shifting full-bridge output ' 0 ', output current will reduce this moment.Thereby current inner loop has guaranteed the reference current of the transient current peak value real-time tracking outer voltage adjusting output of phase-shifting full-bridge.Current inner loop can reach the real-time tracking of peak current in switch periods, but thereby the current inner loop Approximate Equivalent be the proportional component of proportionality coefficient K=1.Outer voltage and the control of PFC outer voltage are similar.
Claims (9)
1. classification current-limiting circuit that is used for the Aero-Space AC/DC transfer; It is characterized in that: comprise power section and control section, said power section comprises input filter unit, PFC inverter unit, high-frequency isolation DC/DC inverter unit, accessory power supply unit; Control section comprises that PFC transform controller unit, input supply voltage testing circuit unit, DC/DC current-limiting points are provided with circuit unit, DC/DC control unit; The input of the said input filter unit of output termination of input ac power; The input of said PFC inverter unit of the output termination of said input filter unit and said input supply voltage testing circuit unit; The input of said high-frequency isolation DC/DC inverter unit of the output termination of said PFC inverter unit and accessory power supply unit; The said PFC transform controller of output termination unit, DC/DC control unit, input supply voltage testing circuit unit and the DC/DC current-limiting points of said accessory power supply unit is provided with the input of circuit unit; Another input of the said PFC inverter unit of output termination of said PFC transform controller unit; The said DC/DC current-limiting points of output termination of said input supply voltage testing circuit unit is provided with another input of circuit unit; Said DC/DC current-limiting points is provided with another input of the said DC/DC control unit of output termination of circuit unit; Another input of the said high-frequency isolation DC/DC inverter unit of output termination of said DC/DC control unit, said high-frequency isolation DC/DC inverter unit is output as the output of DC power supply.
2. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 1, it is characterized in that: the differential mode inductance filter circuit is partly adopted in said input filtering, and said input filtering part is carried out Filtering Processing to input ac power.
3. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 1; It is characterized in that: said PFC inverter unit comprises rectifier bridge and boost booster circuit; Said rectifier bridge carries out halfwave rectifier to AC supply voltage; Said boost booster circuit is the voltage transformation after the rectification DC bus-bar voltage through high-frequency PWM control again; Voltage waveform after the waveform of controlling inductive current simultaneously and the rectification is consistent, and the switching tube in the said boost booster circuit adopts harmless soft its make-and-break voltage of switch control.
4. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 3; It is characterized in that: said boost booster circuit is made up of the main limit of switching tube VT7 and inductance L 3; The secondary of said inductance L 3 and inductance L 4, capacitor C 17, capacitor C 18 constitute resonant circuit, and said resonant circuit makes opening of said switching tube or turn-offs under harmless soft switch condition and accomplish.
5. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 4; It is characterized in that: also comprise the MOSFET voltage clamping circuit of being made up of diode VD33, capacitor C 45, resistance R 54, said MOSFET voltage clamping circuit is connected the output of said boost booster circuit.
6. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 4; It is characterized in that: said PFC transform controller unit is made up of UC3854 and peripheral circuit thereof, and said PFC transform controller unit adopts the dicyclo control mode of outer voltage, current inner loop to control the work of said PFC inverter unit.
7. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 4; It is characterized in that: said high-frequency isolation DC/DC inverter unit adopts the integrated phase whole-bridging circuit of magnetic; It comprises four-quadrant full-bridge, high-frequency isolation transformer T2, halfwave rectifier, filter inductance, filter capacitor C34 resonant inductance L 5 compositions, and said filter inductance and said high-frequency isolation transformer T2 are integrated on the magnet.
8. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 7; It is characterized in that: said DC/DC control circuit is made up of chip UC3895 and peripheral circuit thereof, and said DC/DC control circuit adopts the dicyclo control of interior ring of peak current and outer voltage that the output voltage of said high-frequency isolation DC/DC inverter unit is controlled.
9. a kind of classification current-limiting circuit that is used for the Aero-Space AC/DC transfer as claimed in claim 1; It is characterized in that: said input supply voltage testing circuit unit detects the AC power of input; Said DC/DC current-limiting points is provided with circuit unit and according to the detection output of importing said voltage detection circuit unit current-limiting points is provided with; Said DC/DC control unit is provided with situation according to the current-limiting points that said DC/DC current-limiting points is provided with circuit unit; Said high-frequency isolation DC/DC inverter unit is controlled; Said high-frequency isolation DC/DC inverter unit converts the direct voltage of importing into load required DC power supply under the control of said DC/DC control unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010299127XA CN102437752A (en) | 2010-09-29 | 2010-09-29 | Grading limiting circuit for aerospace alternative-current/direct-current (AC/DC) converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010299127XA CN102437752A (en) | 2010-09-29 | 2010-09-29 | Grading limiting circuit for aerospace alternative-current/direct-current (AC/DC) converter |
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| CN103532401A (en) * | 2013-10-30 | 2014-01-22 | 镇江船舶电器有限责任公司 | Switching power supply with function of power-factor correction |
| CN104539006A (en) * | 2014-12-09 | 2015-04-22 | 许继电气股份有限公司 | Fuel cell discharge power supply device |
| CN104583784A (en) * | 2012-08-20 | 2015-04-29 | 德克萨斯仪器股份有限公司 | Systems and methods of input power and current measurement |
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| CN110808688A (en) * | 2019-10-23 | 2020-02-18 | 福建睿能科技股份有限公司 | Textile equipment and power supply circuit thereof |
| CN111030501A (en) * | 2020-01-03 | 2020-04-17 | 西南交通大学 | Control method and control device of capacitor charging power supply |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104583784A (en) * | 2012-08-20 | 2015-04-29 | 德克萨斯仪器股份有限公司 | Systems and methods of input power and current measurement |
| CN104583784B (en) * | 2012-08-20 | 2018-04-03 | 德克萨斯仪器股份有限公司 | The system and method for Input Power ＆ Current measurement |
| CN103532401A (en) * | 2013-10-30 | 2014-01-22 | 镇江船舶电器有限责任公司 | Switching power supply with function of power-factor correction |
| CN104539006A (en) * | 2014-12-09 | 2015-04-22 | 许继电气股份有限公司 | Fuel cell discharge power supply device |
| CN104539006B (en) * | 2014-12-09 | 2018-04-24 | 许继电气股份有限公司 | A kind of fuel cell electric discharge supply unit |
| CN105183065A (en) * | 2015-10-16 | 2015-12-23 | 天津七六四通信导航技术有限公司 | Portable 28V DC (Direct Current) voltage-stabilized power supply |
| CN108583352A (en) * | 2018-06-26 | 2018-09-28 | 安徽聚捷汽车电子有限公司 | A kind of three-in-one vehicle-mounted charging device |
| CN109525108A (en) * | 2018-09-28 | 2019-03-26 | 中国人民解放军第五七九工厂 | A kind of aircraft passenger compartment 28V DC power supply |
| CN110808688A (en) * | 2019-10-23 | 2020-02-18 | 福建睿能科技股份有限公司 | Textile equipment and power supply circuit thereof |
| CN111030501A (en) * | 2020-01-03 | 2020-04-17 | 西南交通大学 | Control method and control device of capacitor charging power supply |
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