CN110912409A - Forward and reverse excitation type switching power supply circuit - Google Patents

Forward and reverse excitation type switching power supply circuit Download PDF

Info

Publication number
CN110912409A
CN110912409A CN201911081546.3A CN201911081546A CN110912409A CN 110912409 A CN110912409 A CN 110912409A CN 201911081546 A CN201911081546 A CN 201911081546A CN 110912409 A CN110912409 A CN 110912409A
Authority
CN
China
Prior art keywords
capacitor
diode
transformer
secondary winding
anode
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.)
Granted
Application number
CN201911081546.3A
Other languages
Chinese (zh)
Other versions
CN110912409B (en
Inventor
许梦羊
张彦斌
冯刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mornsun Guangzhou Science and Technology Ltd
Original Assignee
Mornsun Guangzhou Science and Technology Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mornsun Guangzhou Science and Technology Ltd filed Critical Mornsun Guangzhou Science and Technology Ltd
Priority to CN201911081546.3A priority Critical patent/CN110912409B/en
Publication of CN110912409A publication Critical patent/CN110912409A/en
Priority to PCT/CN2020/126761 priority patent/WO2021088925A1/en
Application granted granted Critical
Publication of CN110912409B publication Critical patent/CN110912409B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a forward and reverse excitation type switching power supply circuit which is applied to a boosting occasion that the output voltage is far higher than the input voltage, and the output voltage can be adjusted. The controllable switch device is used as a control switch, and is controlled to be switched off when the output short circuit or the output voltage is low, so that the whole circuit works in a flyback state, and the short circuit power consumption and the output efficiency are greatly reduced; when the output voltage is higher, the switch tube is controlled to be conducted, so that the whole circuit works in a forward and reverse excited state, the voltage stress of a power tube of the whole circuit is reduced, the device selection is facilitated, and the efficiency of the whole machine is further improved.

Description

Forward and reverse excitation type switching power supply circuit
Technical Field
The invention relates to the field of switching power supplies, in particular to a forward and reverse excitation type switching power supply circuit.
Background
At present, a high-voltage constant-current charging converter is used in many fields, a flyback basic topology is generally applied to the field of outputting high-voltage and low-power, the purpose of high-output voltage is achieved by boosting voltage in a multi-winding mode or forming multi-stage voltage-multiplying rectification through a capacitor and a diode, but the methods have certain limitations:
the mode of rectifying by multiple windings and then outputting in series is adopted, namely a plurality of flyback outputs are connected in series, the higher the output voltage is, the more windings are needed, the requirement on the size of the transformer is a challenge, and in addition, the pin pitch of the transformer needs to be further increased, so the size of the whole transformer is larger;
the voltage-multiplying mode of the capacitor and the diode is only suitable for application with small current, and the situation with large output current is limited.
The prior art discloses a specific circuit topology structure of a flyback circuit, as shown in fig. 1.
The transformer has high energy transmission efficiency, is simple in structure, can output high voltage only by one winding, and has voltage of one winding more than that of common flyback voltage-multiplying rectification, so that the output voltage can be increased to be higher under the same transformer condition.
However, there is a fatal defect that when the output is short-circuited or the output voltage is less than the voltage of the secondary winding, the efficiency is sharply reduced, the loss of the primary side switching tube is sharply increased, and the performance and reliability of the whole machine product are affected. Particularly for a product with constant current source output, hiccup protection can not occur in the case of short circuit, the short circuit is considered to be that the output voltage is equal to the forward voltage drop of a rectifier diode, at this time, the circuit working in a forward state can reversely charge capacitors C1 and C2, the secondary winding of the transformer T1 can be always clamped at a negative voltage, a large current can be formed in the flyback working state, the duration is long, and the loss of a magnetic core and a primary side switching tube is increased sharply. The method comprises the following specific steps:
when the switching tube Q1 is turned on, the primary side 2 end of the transformer T1 is positive, and the primary side 1 end is negative, and this time belongs to a forward path, and then transfers energy to the secondary side while exciting the primary side of the transformer T1, because the primary side 1 end and the secondary side 3 end of the transformer T1 are dotted ends, and the path of secondary side energy transmission is that current flowing from the 3 end of the transformer T1 flows through the capacitor C1, the diode D3, the capacitor C3, and the capacitor C2 to return to the 4 end of the transformer T1 to form a forward loop, three capacitors are charged, and the output voltage starts to be established. At this time, the capacitor C1 and the capacitor C2 are both in the negative-down state. When the primary side switching tube Q1 is in an off state, voltages at two ends of the transformer T1 deflect, and a voltage induced to the secondary side of the transformer T1 also deflects, so that the end 4 is positive, and the end 3 is negative, but voltages of the capacitors C1 and C2 are charged in a reverse direction of the forward loop, so that the capacitors C1 and C2 need to be discharged at the beginning of the flyback loop, and then the reverse charging is performed, a large current is formed at this time, so that loss is increased, the output voltage is established slowly, and the startup time is long. This is also one of the drawbacks of this existing topology;
after a plurality of cycles of charging, the voltages of the capacitor C1 and the capacitor C2 are in a positive-negative state, and the flyback loop charges the capacitor C1 through the diode D1, charges the capacitor C2 through the diode D2, and charges the capacitor C3 through the diode D1, the diode D3 and the diode D2 when the primary switch Q1 is turned off. When the primary side switching tube Q1 is turned on, the forward loop is turned on, and the primary side energy reversely charges the secondary side capacitors C1 and C2 through the transformer T1. The output voltage at this time is equal to the sum of the three voltages of the capacitor C1, the capacitor C1, and the secondary winding voltage. When the output voltage is higher than the voltage on the secondary winding of the transformer T1, the voltages of the capacitors C1 and C2 do not present a positive-up negative state, the current generated by forward excitation is smaller, the loss is smaller, when the output is short-circuited or the output voltage is lower than the winding voltage, the forward loop lasts longer, the current on the primary side of the refraction transformer T1 is larger, the duration is longer, the loss is larger, and the fatal defect of the existing forward-flyback circuit can not be short-circuited or the lower voltage is output.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a forward and reverse excitation type switching power supply circuit, which is applied to the boosting occasion that the output voltage is far higher than the input voltage, the topology control of the transformer is simpler, the problem of rapid loss increase caused by lower output voltage or short circuit is thoroughly solved, and the topology is easier to be produced.
The invention conception of the invention is as follows:
a new control logic is provided for the forward and reverse excitation circuit topology of the existing transformer, and the fatal defect of the existing circuit is fundamentally overcome. The fundamental reason that the forward and backward excitation circuit of the transformer has large loss in a short circuit state or a low output voltage state is that a forward excitation path exists. The idea of the invention is to disconnect the forward path when the output voltage is short-circuited or lower than the winding voltage, as shown in fig. 2, a switching tube Q2 is connected in series in the forward charging loop, when the output voltage is short-circuited or lower, the switching tube Q2 is disconnected, and then the forward and reverse flyback circuit becomes a pure common flyback circuit, the diode D1 and the capacitor C1 form a flyback output rectifying loop, and the diode D3, the diode D2 and the capacitor C3 form another flyback loop. The primary side switching tube Q1 is not stressed as the output voltage is low. In addition, in the starting process, the output voltage starts to rise from zero, so that the common flyback circuit starts to be used, the starting capability is enhanced, and the starting time is greatly shortened. After the output voltage reaches a certain value, the switching tube Q2 in the forward path is opened, and the circuit becomes a forward and reverse circuit, so that the control logic not only improves the starting capability, but also solves the problems of short circuit or low output voltage and large power consumption. The stress on the primary side switching tube Q1 is not influenced.
The invention is realized by the following technical scheme:
a forward and reverse excitation type transformer is applied to the boosting occasion that the output voltage is far higher than the input voltage, and comprises a primary side circuit, a transformer T1 and a secondary side circuit, wherein the secondary side circuit specifically comprises a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2 and a capacitor C3; the end 1 of the primary winding of the transformer T1 and the end 3 of the secondary winding of the transformer T1 are homonymous ends, the end 4 of the secondary winding of the transformer T1 is electrically connected with one end of a capacitor C2 and is connected with the anode of a diode D1, the other end of a capacitor C2 is electrically connected with the anode of a diode D2, the cathode of a diode D2 is connected with the end 3 of the secondary winding of the transformer T1, the cathode of a diode D1 is electrically connected with one end of a capacitor C1 and is connected with the anode of a diode D3, the other end of a capacitor C1 is electrically connected with the end 3 of the secondary winding of the transformer T1, the cathode of a diode D3 is connected with one end of a capacitor C3, and the other end of a capacitor C3 is connected with the electrical connection point of the other end of the capacitor C2.
As one way of connecting the controllable switching device, one end of the controllable switching device is connected to the 4 terminal of the secondary winding of the transformer T1, and the other end of the controllable switching device is connected to one terminal of the capacitor C2.
As another way of connecting the controllable switching device, one end of the controllable switching device is connected to the cathode of the diode D1, and the other end of the controllable switching device is connected to one end of the capacitor C1.
As a further way of connection of the controllable switching device, one terminal of the controllable switching device is connected to the other terminal of the capacitor C2, and the other terminal of the controllable switching device is connected to the anode of the diode D2.
As yet another way of connecting the controllable switching device, one end of the controllable switching device is connected to the other end of the capacitor C1, and the other end of the controllable switching device is connected to the 3-terminal of the secondary winding of the transformer T1.
Preferably, the controllable switch device is a switch tube, the drain of the switch tube is one end of the controllable switch device, and the source of the switch tube is the other end of the controllable switch device.
Preferably, the switching tube is a MOS tube.
Preferably, the controllable switching device is an IGBT, the drain of the IGBT is one end of the controllable switching device, and the source of the IGBT is the other end of the controllable switching device.
Preferably, the controllable switch device is a thyristor, an anode terminal a of the thyristor is one terminal of the controllable switch device, and a cathode terminal K of the thyristor is the other terminal of the controllable switch device.
Interpretation of terms:
electrically coupling: the connection mode includes direct connection or indirect connection, and also includes connection modes such as inductive coupling, for example, the connection mode described in the invention is that "4 ends of the secondary winding of the transformer are electrically connected with one end of the capacitor C2", is direct connection, and when a switching tube is connected between the 4 ends of the secondary winding of the transformer and one end of the capacitor C2, the connection mode belongs to indirect connection.
Compared with the prior art, the invention has the following beneficial effects:
1. the novel forward and flyback circuit topology is provided, a single circuit topology is switched into two circuit topologies, the two topologies can be flexibly switched according to actual requirements, the problem is solved by applying a common flyback topology when the voltage is lower, and the problems of poor starting and large short-circuit power consumption caused by the original forward and flyback circuit are solved by adopting the forward and flyback topology when the output voltage is higher;
2. the switching logic of the two topologies is clear and simple, only a switching tube is added in a forward loop for control, and the control logic solves the fatal defect of the existing forward and backward excitation circuit, improves the performance and reliability of the product, and skillfully embodies the advantages of the flyback topology and the forward and backward excitation topology;
3. the control logic is simple, flexible and changeable, any point in a forward path can be cut off, the same effect can be achieved by adding a switch tube at any point in the forward path under the condition that a flyback loop is not influenced, the flyback circuit and the forward and reverse flyback circuit are skillfully fused, and the product popularization is easier to realize.
Drawings
Fig. 1 is a conventional forward and reverse excitation type switching power supply circuit;
FIG. 2 is a schematic diagram of a flyback switching power supply circuit according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a flyback switching power supply circuit according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a flyback switching power supply circuit according to a third embodiment of the present invention;
fig. 5 is a schematic diagram of a forward-reverse-excited switching power supply circuit according to a fourth embodiment of the present invention.
Detailed Description
Fig. 2 shows a schematic diagram of a flyback switching power supply circuit of the present invention, which is applied to a high-voltage constant-current converter, and mainly adds a switching tube Q2 to a flyback loop to control the timing of opening the flyback loop.
The specific idea is as follows: a switch tube Q2 is connected in series in a forward charging loop, when the output voltage is short-circuited or low, the switch tube Q2 is disconnected, then the forward and reverse exciting circuit becomes a pure common flyback circuit, a flyback output rectifying loop is formed by a diode D1 and a capacitor C1, and another flyback loop is formed by a diode D3, a diode D2 and a capacitor C3. The primary side switching tube Q1 is not stressed as the output voltage is low. In addition, in the starting process, the output voltage starts to rise from zero, so that the common flyback circuit starts to be used, the starting capability is enhanced, and the starting time is greatly shortened. After the output voltage reaches a certain value, the switch tube Q2 in the forward path is opened, and the circuit becomes a forward and reverse circuit.
In order that those skilled in the art will better understand the present invention, the present invention will be further described below in conjunction with specific implementation circuits.
First embodiment
FIG. 2 is a schematic diagram of a first embodiment of a forward-flyback switching power supply circuit of the present invention, which includes a primary circuit, a transformer T1, and a secondary circuit, where the primary circuit includes a switch transistor Q1, a drain of the switch transistor Q1 is connected to the 2-terminal of the primary winding of the transformer T1, and a source of the switch transistor Q1 is grounded; the secondary side circuit specifically comprises a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2, a capacitor C3, a switching tube Q2 and a diode D4, wherein the diode D4 is a body diode of a switching tube Q2; the end 1 of the primary winding of the transformer T1 and the end 3 of the secondary winding of the transformer T1 are the same-name ends, the end 4 of the secondary winding of the transformer T1 is connected with the drain of the switching tube Q2 and the anode of the diode D1, the source of the switching tube Q2 is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with the end 3 of the secondary winding of the transformer T1, the cathode of the diode D1 is connected with one end of the capacitor C1 and the anode of the diode D3, the other end of the capacitor C1 is connected with the end 3 of the secondary winding of the transformer T1, the cathode of the diode D3 is connected with one end of the capacitor C3, and the other end of the capacitor C3 is connected with the connection point of the.
The working principle of the embodiment is as follows:
when the circuit is started, the output voltage starts to rise from zero, and the switch tube Q2 is not conducted. When the switching tube Q1 is conducted, the primary side circuit is a forward loop to charge the capacitor C1 and the capacitor C2, but because the switching tube Q2 is not conducted and does not have a forward loop, energy generated by excitation of the transformer T1 is stored in a magnetic core and is not released to the secondary side circuit, when the switching tube Q1 is turned off, voltage at two ends of the transformer T1 is reversed, a flyback rectifying path of the secondary side circuit opens energy excited by the transformer T1 to be transmitted to the secondary side circuit, the whole process forms a common flyback, when output voltage is slowly established to reach a certain value (the value is set through an external circuit) in the energy transmission process, the switching tube Q2 of the forward loop is controlled to be conducted, and then the circuit works in the forward and flyback circuit. The on/off of the switching tube Q2 is determined by the output voltage.
Second embodiment
The second embodiment is shown in fig. 3, and the differences from the first embodiment are: the switch Q2 of the second embodiment is an N-MOS transistor, and the serial position is changed between the diode D1 and the capacitor C1, the drain of the switch is connected to the cathode of the diode D1, and the source of the switch is connected to one end of the capacitor C1.
The working principle of this embodiment is the same as that of the first embodiment, and will not be described herein.
Third embodiment
The third embodiment is shown in fig. 4, and the differences from the first embodiment are: the switching tube Q2 of the third embodiment is a P-MOS tube and the series position is changed between the diode D2 and the capacitor C2, the drain of the switching tube is connected to the other end of the capacitor C2, and the source of the switching tube is connected to the anode of the diode D2.
The working principle of this embodiment is the same as that of the first embodiment, and will not be described herein.
Fourth embodiment
The fourth embodiment is shown in fig. 5, and the differences from the first embodiment are: the switching tube Q2 of the fourth embodiment is a P-MOS tube, and the series position is changed between the terminal 3 of the secondary winding of the transformer T1 and the capacitor C1, the source of the switching tube is connected to the other terminal of the capacitor C1, and the drain of the switching tube is connected to the terminal 3 of the secondary winding of the transformer T1.
In the above description of the preferred embodiments of the present invention, it should be noted that the above described preferred embodiments should not be considered as limiting the present invention, and it will be apparent to those skilled in the art that several modifications and decorations can be made without departing from the spirit and scope of the present invention, for example, the modification of the same name terminal of the transformer T1, the modification of the switching tube Q2 to other devices that can achieve the same function, such as MOS transistor, IGBT, thyristor, relay, etc., and the modifications and decorations to all circuits that can achieve this function should also be considered as the protection scope of the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims.

Claims (8)

1. A forward and reverse excitation type switching power supply circuit is applied to the boosting occasion that the output voltage is far higher than the input voltage, and comprises a primary side circuit, a transformer T1 and a secondary side circuit, wherein the secondary side circuit specifically comprises a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2 and a capacitor C3; the end 1 of the primary winding of the transformer T1 and the end 3 of the secondary winding of the transformer T1 are the same-name ends, the end 4 of the secondary winding of the transformer T1 is electrically connected to one end of a capacitor C2 and is connected to the anode of a diode D1, the other end of a capacitor C2 is electrically connected to the anode of a diode D2, the cathode of a diode D2 is connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D1 is electrically connected to one end of a capacitor C1 and is connected to the anode of a diode D3, the other end of a capacitor C1 is electrically connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D3 is connected to one end of a capacitor C3, and the other end of a capacitor C3 is connected to the electrical connection point between the other end of the: and the controllable switching device is connected with one end of the secondary winding of the transformer T1 and the other end of the controllable switching device is connected with one end of the capacitor C2.
2. A forward and reverse excitation type switching power supply circuit is applied to the boosting occasion that the output voltage is far higher than the input voltage, and comprises a primary side circuit, a transformer T1 and a secondary side circuit, wherein the secondary side circuit specifically comprises a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2 and a capacitor C3; the end 1 of the primary winding of the transformer T1 and the end 3 of the secondary winding of the transformer T1 are the same-name ends, the end 4 of the secondary winding of the transformer T1 is electrically connected to one end of a capacitor C2 and is connected to the anode of a diode D1, the other end of a capacitor C2 is electrically connected to the anode of a diode D2, the cathode of a diode D2 is connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D1 is electrically connected to one end of a capacitor C1 and is connected to the anode of a diode D3, the other end of a capacitor C1 is electrically connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D3 is connected to one end of a capacitor C3, and the other end of a capacitor C3 is connected to the electrical connection point between the other end of the: and the controllable switching device is connected with one end of the diode D1, and the other end of the controllable switching device is connected with one end of the capacitor C1.
3. A forward and reverse excitation type switching power supply circuit is applied to the boosting occasion that the output voltage is far higher than the input voltage, and comprises a primary side circuit, a transformer T1 and a secondary side circuit, wherein the secondary side circuit specifically comprises a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2 and a capacitor C3; the end 1 of the primary winding of the transformer T1 and the end 3 of the secondary winding of the transformer T1 are the same-name ends, the end 4 of the secondary winding of the transformer T1 is electrically connected to one end of a capacitor C2 and is connected to the anode of a diode D1, the other end of a capacitor C2 is electrically connected to the anode of a diode D2, the cathode of a diode D2 is connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D1 is electrically connected to one end of a capacitor C1 and is connected to the anode of a diode D3, the other end of a capacitor C1 is electrically connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D3 is connected to one end of a capacitor C3, and the other end of a capacitor C3 is connected to the electrical connection point between the other end of the: and the controllable switching device is connected with one end of the capacitor C2, and the other end of the controllable switching device is connected with the anode of the diode D2.
4. A forward and reverse excitation type switching power supply circuit is applied to the boosting occasion that the output voltage is far higher than the input voltage, and comprises a primary side circuit, a transformer T1 and a secondary side circuit, wherein the secondary side circuit specifically comprises a diode D1, a diode D2, a diode D3, a capacitor C1, a capacitor C2 and a capacitor C3; the end 1 of the primary winding of the transformer T1 and the end 3 of the secondary winding of the transformer T1 are the same-name ends, the end 4 of the secondary winding of the transformer T1 is electrically connected to one end of a capacitor C2 and is connected to the anode of a diode D1, the other end of a capacitor C2 is electrically connected to the anode of a diode D2, the cathode of a diode D2 is connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D1 is electrically connected to one end of a capacitor C1 and is connected to the anode of a diode D3, the other end of a capacitor C1 is electrically connected to the end 3 of the secondary winding of the transformer T1, the cathode of a diode D3 is connected to one end of a capacitor C3, and the other end of a capacitor C3 is connected to the electrical connection point between the other end of the: and the controllable switching device is connected with one end of the capacitor C1, and the other end of the controllable switching device is connected with the 3 end of the secondary winding of the transformer T1.
5. The flyback switching power supply circuit according to any one of claims 1 to 4, wherein: the controllable switch device is a switch tube, the drain electrode of the switch tube is one end of the controllable switch device, and the source electrode of the switch tube is the other end of the controllable switch device.
6. The flyback switching power supply circuit according to claim 5, wherein: the switching tube is an MOS tube.
7. The flyback switching power supply circuit according to any one of claims 1 to 4, wherein: the controllable switch device is an IGBT, the drain electrode of the IGBT is one end of the controllable switch device, and the source electrode of the IGBT is the other end of the controllable switch device.
8. The flyback switching power supply circuit according to any one of claims 1 to 4, wherein: the controllable switch device is a controllable silicon, the anode A end of the controllable silicon is one end of the controllable switch device, and the cathode K end of the controllable silicon is the other end of the controllable switch device.
CN201911081546.3A 2019-11-07 2019-11-07 Forward and reverse excitation type switching power supply circuit Active CN110912409B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201911081546.3A CN110912409B (en) 2019-11-07 2019-11-07 Forward and reverse excitation type switching power supply circuit
PCT/CN2020/126761 WO2021088925A1 (en) 2019-11-07 2020-11-05 Forward-flyback switching power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911081546.3A CN110912409B (en) 2019-11-07 2019-11-07 Forward and reverse excitation type switching power supply circuit

Publications (2)

Publication Number Publication Date
CN110912409A true CN110912409A (en) 2020-03-24
CN110912409B CN110912409B (en) 2020-12-18

Family

ID=69816496

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911081546.3A Active CN110912409B (en) 2019-11-07 2019-11-07 Forward and reverse excitation type switching power supply circuit

Country Status (2)

Country Link
CN (1) CN110912409B (en)
WO (1) WO2021088925A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021088925A1 (en) * 2019-11-07 2021-05-14 广州金升阳科技有限公司 Forward-flyback switching power supply circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116054680B (en) * 2022-08-19 2023-10-27 荣耀终端有限公司 Motor driving circuit and terminal equipment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3981114B2 (en) * 2004-11-26 2007-09-26 Ｔｄｋ株式会社 Switching power supply
CN202309527U (en) * 2011-11-09 2012-07-04 深圳市同洲电子股份有限公司 Flyback switching power supply output short-circuit protection circuit
CN102891608A (en) * 2011-07-21 2013-01-23 山特电子（深圳）有限公司 High-efficiency and low-cost forward-flyback DC-DC (direct current-direct current) converter topology
CN102891606A (en) * 2012-09-07 2013-01-23 上海新时达电气股份有限公司 Switching power supply
CN106230263A (en) * 2016-07-28 2016-12-14 天宝电子（惠州）有限公司 A kind of positive activation type ZVT supply convertor
CN206442303U (en) * 2016-01-15 2017-08-25 半导体元件工业有限责任公司 Power-switching circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100461598C (en) * 2004-11-08 2009-02-11 中兴通讯股份有限公司 Reset circuit of single-end ortho-exciting electric source
US7505288B2 (en) * 2005-11-29 2009-03-17 Potentia Semiconductor Corporation DC converter with independently controlled outputs
CN104981971B (en) * 2013-02-28 2018-12-28 瑞典爱立信有限公司 The switched-mode power supply of Forward- flyback topology
CN204515096U (en) * 2015-04-30 2015-07-29 西安科技大学 A kind of working state monitoring of uninterrupted switch power supply and indicating circuit
CN105792447B (en) * 2016-05-16 2017-07-14 浙江工业职业技术学院 The LED drive circuit and its high power factor correction device of no electrolytic capacitor
CN106992687A (en) * 2017-05-10 2017-07-28 深圳戴普森新能源技术有限公司 A kind of single tube Forward- flyback voltage multiplying rectifier power circuit
WO2019181544A1 (en) * 2018-03-20 2019-09-26 Ntn株式会社 Forward-flyback insulated switching power supply
CN110912409B (en) * 2019-11-07 2020-12-18 广州金升阳科技有限公司 Forward and reverse excitation type switching power supply circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3981114B2 (en) * 2004-11-26 2007-09-26 Ｔｄｋ株式会社 Switching power supply
CN102891608A (en) * 2011-07-21 2013-01-23 山特电子（深圳）有限公司 High-efficiency and low-cost forward-flyback DC-DC (direct current-direct current) converter topology
CN202309527U (en) * 2011-11-09 2012-07-04 深圳市同洲电子股份有限公司 Flyback switching power supply output short-circuit protection circuit
CN102891606A (en) * 2012-09-07 2013-01-23 上海新时达电气股份有限公司 Switching power supply
CN206442303U (en) * 2016-01-15 2017-08-25 半导体元件工业有限责任公司 Power-switching circuit
CN106230263A (en) * 2016-07-28 2016-12-14 天宝电子（惠州）有限公司 A kind of positive activation type ZVT supply convertor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
胡海兵等: "一族有源钳位正激变换器", 《电工技术学报》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021088925A1 (en) * 2019-11-07 2021-05-14 广州金升阳科技有限公司 Forward-flyback switching power supply circuit

Also Published As

Publication number Publication date
CN110912409B (en) 2020-12-18
WO2021088925A1 (en) 2021-05-14

Similar Documents

Publication Publication Date Title
CN111654193B (en) Drive control method and circuit thereof
CN110855151B (en) Positive and negative excitation type switching power supply circuit and control method thereof
CA2327629C (en) Magnetically coupled autonomous battery equalization circuit
EP3883112B1 (en) Acf converter, voltage conversion method and electronic device
CN110912409B (en) Forward and reverse excitation type switching power supply circuit
WO2022110813A1 (en) Power-down delay protection circuit and control method
CN110995003B (en) Forward and reverse excitation type switching power supply circuit
US7944713B2 (en) Electric power conversion circuit having transfer gain variable by pulse-width modulation
US11831238B2 (en) Power conversion system
KR102155031B1 (en) Power supply and gate driver therein
CN206602454U (en) Make the circuit of rectifying tube soft start, module and its power supply in circuit of synchronous rectification
CN106571743B (en) Double-tube forward switch power supply circuit
US20210242790A1 (en) Control unit for improving conversion efficiency
TWI777313B (en) Power device and operation method thereof
CN111404391A (en) Positive-shock active clamping driving circuit
CN220775800U (en) Shutoff, electric energy unit and photovoltaic system
CN110165966A (en) A kind of power converter of switch reluctance motor and its control method
WO2023010733A1 (en) Soft switching circuit, circuit board assembly, and switching power supply
CN115133782B (en) Active clamp flyback circuit and control method thereof
CN215772920U (en) High-gain flyback converter
CN112491280B (en) Output voltage doubling circuit of forward and reverse flyback converter
CN113556038B (en) High-voltage wide-range input booster circuit and soft switching circuit
CN109936888A (en) High frequency drive circuit and the lighting device for using the high frequency drive circuit
CN212305149U (en) High-voltage input switching power supply circuit
CN116599340A (en) Power supply circuit and switching power supply

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant