CN205901617U - Two voltage PFC converters and three -phase alternating current input power supply circuit - Google Patents
Two voltage PFC converters and three -phase alternating current input power supply circuit Download PDFInfo
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- CN205901617U CN205901617U CN201620703548.7U CN201620703548U CN205901617U CN 205901617 U CN205901617 U CN 205901617U CN 201620703548 U CN201620703548 U CN 201620703548U CN 205901617 U CN205901617 U CN 205901617U
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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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Abstract
The utility model provides a two voltage PFC converters and three -phase alternating current input power supply circuit belongs to the power supply circuit field. The utility model discloses two voltage PFC converters include controller, energy storage unit, current detection unit, voltage detection unit, switch element, wherein, the controller respectively with current detection unit, switch element, voltage detection unit link to each other, the current detection unit links to each other through the output of energy storage unit with alternating current power supply AC, the switch element is two the tunnel, is first via switch element and second way switch element respectively, first via switch element sets up between current detection unit and the electric capacity C1, second way switch element sets up between current detection unit and electric capacity C2. The utility model discloses simple structure, efficiency greatly increased saves electronic components, and is with low costs to be applicable to high -power occasion and three -phase input power occasion.
Description
Technical field
The utility model is related to a kind of power circuit, and more particularly, to a kind of twin voltage pfc converter and three-phase alternating current input
Power circuit.
Background technology
Now in power circuit on the market, in order to improve the power factor of power supply, generally adopt pfc circuit, namely
Circuit of power factor correction.Fig. 1 is existing pfc circuit structure, the more too many diode of its circuital current, causes efficiency very
Low, and may not apply to large-power occasions；And it is not suitable for the occasion of three-phase input power supply.
Utility model content
For solving the problems of the prior art, the utility model provides a kind of twin voltage pfc converter and contains this converter
Three-phase alternating current input power circuit.
The utility model twin voltage pfc converter is arranged between AC power ac and dual output unit, twin voltage
Output unit includes electric capacity c1 and electric capacity c2, and described electric capacity c1 and electric capacity c2 is connected in parallel on alternating current unit ac output end, described double electricity
Pressure pfc converter includes controller, energy-storage units, current detecting unit, voltage detection unit, switch element, wherein, described control
Device processed is connected with described current detecting unit, switch element, voltage detection unit respectively, and described current detecting unit passes through energy storage
Unit is connected with the output end of AC power ac, and described switch element is two-way, respectively first via switch element and the second tunnel
Switch element, described first via switch element is arranged between described current detecting unit and electric capacity c1, described second way switch
Unit is arranged between current detecting unit and electric capacity c2, and described voltage detection unit is used for detecting the voltage of AC power ac
V1, the voltage v3 of the voltage v2 of electric capacity c1 and electric capacity c2.
The utility model is further improved, and described switch element includes two diodes connected and a field-effect
Pipe, the diode d1 positive pole of first via switch element is connected with current detecting unit, and diode d3 negative pole is connected with electric capacity c1, field
Effect pipe s1 is connected in parallel between diode d3 and electric capacity c1, wherein, the drain electrode of described FET s1 be connected on two diodes it
Between, the grid of FET s1 is connected with controller；The diode d2 negative pole of the second way switch unit is with current detecting unit even
Connect, the diode d4 positive pole of the second way switch unit is connected with electric capacity c2, and FET s2 is connected in parallel on diode d4 and electric capacity c2
Between, wherein, the source electrode of described FET s2 connects between the two diodes, the grid of FET s2 and controller phase
Even.
The utility model is further improved, and described energy-storage units are inductance l, and described current detecting unit is used for detecting electricity
The electric current of sense l.
The utility model is further improved, and when voltage v1 >=0 of AC power ac, the pwm of FET s2 closes,
Controller calculates the pwm value of FET s1, wherein, when FET s1 opens, inductance l energy storage；FET s1 closes
When, AC power ac charges to electric capacity c1 with the energy being stored in inductance l；
As AC power v1 ＜ 0, the pwm of FET s1 closes, and controller calculates the pwm value of FET s2,
Wherein, when FET s2 opens, inductance l energy storage；When FET s2 closes, AC power ac and being stored in inductance l
Energy charges to electric capacity c2.
The utility model additionally provides a kind of three-phase alternating current input power circuit containing this converter, defeated including three-phase alternating current
Enter power supply and dual output unit, three-phase alternating current input power includes the AC power of three-phase, respectively three-phase electricity a cross streams
Power supply, three-phase electricity b cross streams power supply and three-phase electricity c cross streams power supply, every cross streams power supply connects a twin voltage pfc respectively and turns
Parallel operation, three twin voltage pfc converter parallel connections are simultaneously connected with dual output unit respectively.
The utility model is further improved, and the controller in three twin voltage pfc converters is set to same.
Compared with prior art, the beneficial effects of the utility model are: structure is simple, and efficiency greatly increases, and save electronics
Components and parts, low cost, and it is applied to large-power occasions and three-phase input power supply occasion.
Brief description
Fig. 1 is prior art pfc circuit；
Fig. 2 is twin voltage pfc converter circuit schematic diagram；
Fig. 3 is the utility model schematic diagram；
Fig. 4 is three-phase alternating current input power circuit diagram.
Specific embodiment
With reference to the accompanying drawings and examples the utility model is described in further details.
As shown in Fig. 2 twin voltage pfc converter of the present utility model is arranged on AC power ac and dual output unit
Between, dual output unit includes electric capacity c1 and electric capacity c2, and described electric capacity c1 and electric capacity c2 is connected in parallel on alternating current unit ac output
End.This example includes controller, energy-storage units, current detecting unit, voltage detection unit, switch element, wherein, described controller
It is connected with described current detecting unit, switch element, voltage detection unit respectively, described current detecting unit passes through energy-storage units
It is connected with the output end of AC power ac, described switch element is two-way, respectively the first via switch element and second of parallel connection
Way switch unit, described first via switch element is arranged between described current detecting unit and electric capacity c1, and described second tunnel is opened
Close unit to be arranged between current detecting unit and electric capacity c2, described voltage detection unit is used for detecting the voltage of AC power ac
V1, the voltage v3 of the voltage v2 of electric capacity c1 and electric capacity c2.
The switch element of this example includes two diodes connected and a FET, two poles of first via switch element
Pipe d1 positive pole is connected with current detecting unit, and diode d3 negative pole is connected with electric capacity c1, and FET s1 is connected in parallel on diode d3
And electric capacity c1 between, wherein, the drain electrode of described FET s1 connects between the two diodes, the grid of FET s1 and control
Device processed is connected；The diode d2 negative pole of the second way switch unit is connected with current detecting unit, two poles of the second way switch unit
Pipe d4 positive pole is connected with electric capacity c2, and FET s2 is connected in parallel between diode d4 and electric capacity c2, wherein, described FET s2
Source electrode connect between the two diodes, the grid of FET s2 is connected with controller.
When the DC voltage of AC power ac transmission electric power to dual output unit, adjustment controller is sent
Pwm(pulse width modulation, pulse width modulation) signal pulse width.
The energy-storage units of this example are inductance l, and described current detecting unit is used for detecting the electric current of inductance l, the exchange of this example
Power supply ac is generally 50hz or 60hz mains electricity, but not limited to this.Controller obtains inductive current inductor current value, friendship
The voltage v1 of stream power supply ac, the voltage v3 value of the voltage v2 and electric capacity c2 of electric capacity c1.
As shown in figure 3, operation principle of the present utility model is:
When voltage v1 >=0 of AC power ac, the pwm of FET s2 closes, and controller calculates FET s1
Pwm value, wherein, when FET s1 opens, inductance l energy storage；When FET s1 closes, AC power ac and be stored in electricity
Energy in sense l charges to electric capacity c1；
As AC power v1 ＜ 0, the pwm of FET s1 closes, and controller calculates the pwm value of FET s2,
Wherein, when FET s2 opens, inductance l energy storage；When FET s2 closes, AC power ac and being stored in inductance l
Energy charges to electric capacity c2.
In Fig. 3, the pwm of FET s1 and FET s2 is high frequency pwm, executes HF switch action, and vin is exchange
The input voltage of power supply ac, the switching frequency of pwm is generally far larger than the frequency of input ac power.
Controlled by above, make the voltage v1's of Phase Tracking AC power ac of the input current iin of AC power ac
Voltage-phase, thus realize PFC.The utility model can apply to ups(uninterrupted power source) pfc circuit portion
Point.
As shown in figure 4, this example can also be applied to the occasion of three-phase input power supply, such as three-phase input ups.Three-phase alternating current
Input power includes the AC power of three-phase, respectively three-phase electricity a cross streams power supply, three-phase electricity b cross streams power supply and three-phase electricity c
Cross streams power supply, every cross streams power supply connects a twin voltage pfc converter respectively, and three twin voltage pfc converter parallel connections are simultaneously
It is connected with dual output unit respectively.
Controller in three twin voltage pfc converters of this example could be arranged to three, three controllers be connected it is also possible to
It is set to same, is easy to control, first current detecting unit of this example is used for detecting the electric current of inductance l1, the second current detecting
Unit is used for detecting the electric current of inductance l2, and the 3rd current detecting unit is used for detecting the electric current of inductance l3；Voltage detection unit is used
In the detection voltage v1.a of three-phase electricity a cross streams power supply, the voltage v1.b of three-phase electricity b cross streams power supply, three-phase electricity c cross streams electricity
The voltage v1.c in source, the voltage v3 of the voltage v2 of electric capacity c1 and electric capacity c2.Control and correction principle be applied to single-phase double electricity
Pressure pfc converter is identical.
The specific embodiment of the above is better embodiment of the present utility model, not limits this practicality with this new
Type be embodied as scope, scope of the present utility model includes being not limited to this specific embodiment, all according to the utility model
The equivalence changes made are all in protection domain of the present utility model.
Claims (6)
1. a kind of twin voltage pfc converter, is arranged between AC power ac and dual output unit, dual output unit
Including electric capacity c1 and electric capacity c2 it is characterised in that: include controller, energy-storage units, current detecting unit, voltage detection unit,
Switch element, wherein, described controller is connected with described current detecting unit, switch element, voltage detection unit respectively, described
Current detecting unit is connected with the output end of AC power ac by energy-storage units, and described switch element is two-way, and respectively the
One way switch unit and the second way switch unit, described first via switch element is arranged on described current detecting unit and electric capacity c1
Between, described second way switch unit is arranged between current detecting unit and electric capacity c2, and described voltage detection unit is used for examining
Survey voltage v1, the voltage v3 of the voltage v2 and electric capacity c2 of electric capacity c1 of AC power ac.
2. twin voltage pfc converter according to claim 1 it is characterised in that: described switch element include two series connection
Diode and a FET, the diode d1 positive pole of first via switch element is connected with current detecting unit, diode
D3 negative pole is connected with electric capacity c1, and FET s1 is connected in parallel between diode d3 and electric capacity c1, wherein, described FET s1's
Drain electrode connects between the two diodes, and the grid of FET s1 is connected with controller；The diode d2 of the second way switch unit
Negative pole is connected with current detecting unit, and the diode d4 positive pole of the second way switch unit is connected with electric capacity c2, and FET s2 is simultaneously
It is associated between diode d4 and electric capacity c2, wherein, the source electrode of described FET s2 connects between the two diodes, FET
The grid of s2 is connected with controller.
3. twin voltage pfc converter according to claim 2 it is characterised in that: described energy-storage units be inductance l, described
Current detecting unit is used for detecting the electric current of inductance l.
4. twin voltage pfc converter according to claim 3 it is characterised in that:
When voltage v1 >=0 of AC power ac, the pwm of FET s2 closes, and controller calculates the pwm of FET s1
Value, wherein, when FET s1 opens, inductance l energy storage；When FET s1 closes, AC power ac and being stored in inductance l
Energy to electric capacity c1 charge；
As AC power v1 ＜ 0, the pwm of FET s1 closes, and controller calculates the pwm value of FET s2, wherein,
When FET s2 opens, inductance l energy storage；When FET s2 closes, AC power ac and the energy that is stored in inductance l to
Electric capacity c2 charges.
5. a kind of three-phase alternating current input power circuit comprising twin voltage pfc converter described in any one of claim 1-4, it is special
Levy and be: include three-phase alternating current input power and dual output unit, three-phase alternating current input power includes the alternating current of three-phase
Source, respectively three-phase electricity a cross streams power supply, three-phase electricity b cross streams power supply and three-phase electricity c cross streams power supply, every cross streams power supply
Connect a twin voltage pfc converter respectively, three twin voltage pfc converter parallel connections are simultaneously connected with dual output unit respectively
Connect.
6. three-phase alternating current input power circuit according to claim 5 it is characterised in that: three twin voltage pfc converters
In controller be set to same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620703548.7U CN205901617U (en) | 2016-07-05 | 2016-07-05 | Two voltage PFC converters and three -phase alternating current input power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620703548.7U CN205901617U (en) | 2016-07-05 | 2016-07-05 | Two voltage PFC converters and three -phase alternating current input power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205901617U true CN205901617U (en) | 2017-01-18 |
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ID=57770966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620703548.7U Active CN205901617U (en) | 2016-07-05 | 2016-07-05 | Two voltage PFC converters and three -phase alternating current input power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205901617U (en) |
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2016
- 2016-07-05 CN CN201620703548.7U patent/CN205901617U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |