CN211266762U - APFC direct current 400V direct current stabilized voltage power supply circuit - Google Patents
APFC direct current 400V direct current stabilized voltage power supply circuit Download PDFInfo
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- CN211266762U CN211266762U CN201922109797.XU CN201922109797U CN211266762U CN 211266762 U CN211266762 U CN 211266762U CN 201922109797 U CN201922109797 U CN 201922109797U CN 211266762 U CN211266762 U CN 211266762U
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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 discloses a APFC direct current 400V direct current regulated power supply circuit, including rectifier module, step up transformer, APFC power factor correction circuit and feedback circuit, APFC power factor correction circuit includes control chip IC1, resistance R1, resistance R2, resistance R5, diode D2 and switch tube Q1, and feedback circuit includes diode D1, resistance R4 and resistance R7, 220V alternating current commercial power is connected to rectifier module's input, and electric capacity C1, resistance R1, resistance R4 and step up transformer's voltage input end is connected respectively to rectifier module's output positive pole. The utility model discloses APFC direct current 400V direct current constant voltage power supply circuit adopts the APFC technique, combines rectification, feedback control technique to realize improving purposes such as alternating current power supply utilization ratio, increase consumer's load.
Description
Technical Field
The utility model relates to the technical field of power, specifically a APFC direct current 400V direct current constant voltage power supply circuit.
Background
Any electric equipment needs a power supply for providing energy for the electric equipment when working, the existing power supply is generally divided into a direct current power supply and an alternating current power supply according to functions, wherein the direct current power supply has the advantages of good stability, small fluctuation and the like, and is widely applied, but most of direct current power supplies have lower output voltage and can only meet the requirement of low-power electric loads. Meanwhile, after the input current is rectified and filtered, the input current not only contains sine waves, but also contains a plurality of harmonic components, so that the power factor of the circuit can not reach 1, the power grid is seriously polluted, and even the power equipment is damaged.
The Active Power Factor Correction (APFC) technology has the advantages of improving the network-side Power Factor of the Power electronic device, reducing the line loss, saving the energy, reducing the harmonic pollution of the Power network, improving the Power supply quality of the Power network and the like, and is widely applied to many industries.
The present design proposes an application for implementing a high voltage dc power supply using the APFC technique.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a APFC direct current 400V direct current constant voltage power supply circuit to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an APFC direct current 400V direct current stabilized voltage power supply circuit comprises a rectifying module, a boosting transformer, an APFC power factor correction circuit and a feedback circuit, wherein the APFC power factor correction circuit comprises a control chip IC1, a resistor R1, a resistor R2, a resistor R5, a diode D2 and a switch tube Q1, the feedback circuit comprises a diode D1, a resistor R4 and a resistor R7, the input end of the rectifying module is connected with 220V alternating current mains supply, the positive pole of the output end of the rectifying module is respectively connected with a capacitor C1, a resistor R1, a resistor R4 and the voltage input end of the boosting transformer, the other end of the resistor R1 is connected with a resistor R2, a capacitor C2 and a pin 3 of the control chip IC1, a pin 2 of the control chip IC1 is connected with a capacitor C3 and a capacitor C4, a pin 1 of the control chip IC1 is connected with the other end of a capacitor C3, a resistor R3 and a resistor R7, the voltage output end of the voltage drain of the boosting transformer is connected, The diode-based power supply comprises a resistor R7 and a load, wherein the cathode of a diode D1 is connected with the other ends of a pin 8 of a control chip IC1 and a resistor R4, the other end of a resistor R4 is connected with a pin 5 of a control chip IC1, a pin 6 of the control chip IC1 is grounded, a pin 7 of a control chip IC1 is connected with a resistor R5, the other end of a resistor R5 is connected with the anode of the diode D2 and a resistor R6, the other end of a resistor R6 is grounded, the cathode of the diode D2 is connected with the gate of a switching tube Q1, the drain of the switching tube Q1 is connected with the resistor R8 and a pin 4 of the control chip IC1, the other end of a resistor R8 is connected with the other end of a resistor R3, the other end of a capacitor C1, the other end of the load.
As a further technical solution of the present invention: the rectifying module is a full-bridge rectifying circuit consisting of four 1N4001 diodes, and the output voltage of the rectifying module is 311V.
As a further technical solution of the present invention: the resistor R1 and the resistor R2 form a voltage division circuit.
As a further technical solution of the present invention: the switch Q1 is an N-MOS tube.
As a further technical solution of the present invention: the output voltage of the step-up transformer is 311V, and the output voltage is 400V.
As a further technical solution of the present invention: and a rectifier diode D3 is arranged between the output end of the step-up transformer and the load.
As a further technical solution of the present invention: the capacitor C1 is a filter capacitor.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses APFC direct current 400V direct current constant voltage power supply circuit adopts the APFC technique, combines rectification, feedback control technique to realize improving purposes such as alternating current power supply utilization ratio, increase consumer's load.
Drawings
Fig. 1 is an overall circuit diagram of the present invention.
Fig. 2 is a circuit diagram of embodiment 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an APFC dc 400V dc regulated power supply circuit includes a rectifier module, a step-up transformer, an APFC power factor correction circuit and a feedback circuit, where the APFC power factor correction circuit includes a control chip IC1, a resistor R1, a resistor R2, a resistor R5, a diode D2 and a switch Q1, the feedback circuit includes a diode D1, a resistor R4 and a resistor R7, an input terminal of the rectifier module is connected to a 220V ac mains supply, an anode of an output terminal of the rectifier module is respectively connected to a capacitor C1, a resistor R1, a resistor R4 and a voltage input terminal of the step-up transformer, another terminal of the resistor R1 is connected to a resistor R2, a capacitor C2 and a pin 3 of the control chip IC1, a pin 2 of the control chip IC1 is connected to a capacitor C3 and a capacitor C4, a pin 1 of the control chip IC1 is connected to another terminal of a capacitor C3, a resistor R3 and a resistor R7, and an anode of the step-up, The diode comprises a drain electrode of a switch tube Q1, a resistor R7 and a load, a cathode of a diode D1 is connected with a pin 8 of a control chip IC1 and the other end of a resistor R4, the other end of a resistor R4 is connected with a pin 5 of a control chip IC1, a pin 6 of the control chip IC1 is grounded, a pin 7 of a control chip IC1 is connected with a resistor R5, the other end of a resistor R5 is connected with an anode of a diode D2 and a resistor R6, the other end of the resistor R6 is grounded, a cathode of a diode D2 is connected with a gate of a switch tube Q1, a drain electrode of a switch tube Q1 is connected with a resistor R8 and a pin 4 of a control chip IC1, the other end of a resistor R8 is connected with the other end of a resistor R82 2, the other end of a resistor R3, the other end of a capacitor.
The core element of the circuit is a control chip IC1 with the model number of MC33262, in which a resistor R1 and a resistor R2 are connected in series to form a voltage division circuit, the 311V input voltage after rectification and filtration is divided, the phase and the waveform of the APFC input voltage are detected, and then the APFC input voltage is used as an input signal of a 3-pin multiplier (integrated in the MC33262 chip). After correction and boosting, the voltage is input into pin 1 of control chip IC1 through resistor R7, compared with the reference point potential in control chip IC1, and then output to the other end of the internal multiplier through the compensation network between pin 1 and pin 2, the two voltages are multiplied by the multiplier to obtain sine wave reference voltage V according to the cut-off of the power switchr。
The pin 7 of the control chip IC1 is a drive signal output terminal, and when the pin 7 outputsWhen the driving signal turns on the switching tube Q1, the inductive current rises according to the linear proportional change rule, and the voltage V across the resistor R8 is obtainedR8Inputting the 4 pins of the control chip IC1 to make it and the reference voltage VrAnd (6) comparing. When V isR8＞VrWhen the voltage is low, the 7 pin outputs low voltage, and the switching tube Q1 is cut off. The function of the step-up transformer is to boost the direct current voltage of 311V to 400V, and the output signal is also connected to the 4 pins of the control chip IC1 through a resistor R4, which aims to detect the zero current signal of the step-up transformer, wherein R4 is the resistor for detecting the inductive current.
Inductance of the primary winding of the step-up transformer T1 in this circuit:
wherein the input fluctuation range of the alternating current is 170V-265V, VimaxMaximum value 265V, Vo＝400V，fswmin＝30kHz，PoWhen the desired efficiency η is 94% after 250W, L can be obtained by substituting the formula (1)p＝0.295mH。
Example 2: on the basis of embodiment 1, if a load with electric energy, such as a storage battery, a super capacitor, etc., is connected to the present design, a rectifier diode D3 needs to be added to the output terminal when designing a circuit, as shown in fig. 2, so that the current of the charged load can be prevented from flowing back into the circuit, and a reverse-stopping and reverse-preventing effect is achieved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. An APFC direct current 400V direct current stabilized voltage power supply circuit comprises a rectifying module, a boosting transformer, an APFC power factor correction circuit and a feedback circuit, wherein the APFC power factor correction circuit comprises a control chip IC1, a resistor R1, a resistor R2, a resistor R5, a diode D2 and a switch tube Q1, and the feedback circuit comprises a diode D1, a resistor R4 and a resistor R7 The diode comprises a drain electrode of a switch tube Q1, a resistor R7 and a load, a cathode of a diode D1 is connected with a pin 8 of a control chip IC1 and the other end of a resistor R4, the other end of a resistor R4 is connected with a pin 5 of a control chip IC1, a pin 6 of the control chip IC1 is grounded, a pin 7 of a control chip IC1 is connected with a resistor R5, the other end of a resistor R5 is connected with an anode of a diode D2 and a resistor R6, the other end of the resistor R6 is grounded, a cathode of a diode D2 is connected with a gate of a switch tube Q1, a drain electrode of a switch tube Q1 is connected with a resistor R8 and a pin 4 of a control chip IC1, the other end of a resistor R8 is connected with the other end of a resistor R82 2, the other end of a resistor R3, the other end of a capacitor.
2. The APFC DC 400V DC regulated power supply circuit according to claim 1, wherein the rectification module is a full bridge rectification circuit consisting of four 1N4001 diodes, and the output voltage is 311V.
3. The APFC DC 400V DC voltage-stabilized power supply circuit according to claim 1, wherein the resistor R1 and the resistor R2 form a voltage dividing circuit.
4. The APFC DC 400V DC regulated power supply circuit according to claim 1, wherein the switching tube Q1 is an N-MOS tube.
5. The APFC DC 400V DC regulated power supply circuit according to claim 1, wherein the output voltage of the step-up transformer is 311V, and the output voltage is 400V.
6. An APFC DC 400V DC regulated power supply circuit according to any one of claims 1-5 and characterized in that a rectifier diode D3 is provided between the output of said step-up transformer and the load.
7. The APFC DC 400V DC regulated power supply circuit according to claim 6, wherein the capacitor C1 is a filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922109797.XU CN211266762U (en) | 2019-11-30 | 2019-11-30 | APFC direct current 400V direct current stabilized voltage power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922109797.XU CN211266762U (en) | 2019-11-30 | 2019-11-30 | APFC direct current 400V direct current stabilized voltage power supply circuit |
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| Publication Number | Publication Date |
|---|---|
| CN211266762U true CN211266762U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922109797.XU Expired - Fee Related CN211266762U (en) | 2019-11-30 | 2019-11-30 | APFC direct current 400V direct current stabilized voltage power supply circuit |
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| Country | Link |
|---|---|
| CN (1) | CN211266762U (en) |
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2019
- 2019-11-30 CN CN201922109797.XU patent/CN211266762U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200814 Termination date: 20201130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |