CN211908658U - High-performance flyback switching power supply circuit - Google Patents
High-performance flyback switching power supply circuit Download PDFInfo
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- CN211908658U CN211908658U CN202020394231.6U CN202020394231U CN211908658U CN 211908658 U CN211908658 U CN 211908658U CN 202020394231 U CN202020394231 U CN 202020394231U CN 211908658 U CN211908658 U CN 211908658U
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Abstract
The utility model relates to a power supply circuit technical field specifically is a flyback switching power supply circuit of high performance, including performance control module, the redundant module of power, protection module and transformer, performance control module links to each other with the redundant module of power, and the redundant module of power links to each other with the transformer module, and performance control module still links to each other with protection module, and protection module links to each other with the transformer module simultaneously. The utility model discloses can make power output level and smooth at stable output current under the condition of load sudden change, adopt programmable chip as control chip simultaneously, be favorable to the self-regulation of power itself, have very high safeguard measure, increased redundant design, improved the security, the reliability to and take the load capacity.
Description
Technical Field
The utility model discloses power supply circuit technical field specifically is a high performance flyback switching power supply circuit.
Background
With the development of power electronic technology, power modules are widely applied in various fields, and a switching power supply gradually replaces a linear power supply and becomes a mainstream power supply. The power switch tube of the switch power supply performs on and off actions under the action of PWM (pulse width modulation), and chops the bus voltage into pulse voltage. The drive control circuit controls the duty ratio of the PWM to ensure the stability of the voltage. In a medium-low power DC-DC switching power supply, the most common circuit topologies are a flyback switching power supply and a forward circuit. Because the flyback switching power supply provides energy output to the load only during the period of controlling the switch to be turned off, the transient control characteristic of the output voltage of the flyback switching power supply is relatively poor, the performance is low, and the reliability is poor.
However, in the existing design of the flyback switching power supply, a single power switching tube is generally used as a chopping switch of a primary coil, the transient control characteristic is poor, relative self-regulation cannot be performed due to control of a special chip, the current output capability of a next-stage load cannot be stably realized, the protection measures are incomplete, redundant measures are almost not available, and the safety and the reliability are low.
Therefore, in view of the above situation, there is an urgent need to develop a high-performance flyback switching power supply circuit to overcome the shortcomings in the current practical application.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flyback switching power supply circuit of high performance 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:
a high-performance flyback switching power supply circuit comprises a performance control module, a power redundancy module, a protection module and a transformer module, wherein the performance control module is connected with the power redundancy module, the power redundancy module is connected with the transformer module, the performance control module is also connected with the protection module, and the protection module is simultaneously connected with the transformer module.
As a further aspect of the present invention: the power redundancy module comprises a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a freewheeling diode D1, a freewheeling diode D2, a chopping power MOS transistor Q1 and a chopping power MOS transistor Q2, wherein the cathode of the freewheeling diode D1 is connected with one end of a capacitor C1 and one end of a resistor R1, the capacitor C1 and the resistor R1 are connected in parallel, the anode of the freewheeling diode D1 is connected with the drain of the chopping MOS transistor Q1, the cathode of the freewheeling diode D2 is connected with one end of a capacitor C2 and one end of a resistor R2, the capacitor C2 and the resistor R2 are connected in parallel, and the anode of the freewheeling diode D2 is connected with the drain of the chopping MOS transistor Q2.
As a further aspect of the present invention: and the sources of the chopping MOS tube Q1 and the chopping MOS tube Q2 are both grounded.
As a further aspect of the present invention: the transformer module comprises a transformer, and the transformer consists of a first primary coil, a second primary coil, a secondary coil and a magnet arranged between the second primary coil and the secondary coil.
As a further aspect of the present invention: the first primary coil and the second primary coil are wound in parallel, and the secondary coil is wound in the middle of the first primary coil and the second primary coil.
As a further aspect of the present invention: the other ends of the capacitor C1, the capacitor C2, the resistor R1 and the resistor R2 are connected with the first primary coil and the second primary coil of the transformer.
As a further aspect of the present invention: anodes of the freewheeling diode D1 and the freewheeling diode D2 are connected to the first primary winding and the second primary winding, respectively.
As a further aspect of the present invention: the performance control module is connected with gates of a chopping MOS tube Q1 and a chopping MOS tube Q2; the performance control module is also connected with the protection module, and the protection module is connected with a secondary coil in the transformer module.
As a further aspect of the present invention: the transformer module further comprises a rectifying module, the rectifying module consists of a rectifying diode D3 and an energy storage capacitor C3, the rectifying diode D3 is a diode packaged in a two-body parallel mode, the anode of the rectifying diode D3 is connected with a secondary side coil in the transformer module, the cathode of the rectifying diode D3 is connected with the energy storage capacitor C3 and is connected with an output end Vout, and the other end of the energy storage capacitor C3 is grounded.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses can be under the condition of load sudden change stable output current, make power output level and smooth, adopt the chip able to programme as control chip simultaneously, be favorable to the self-regulation of power itself, have very high safeguard measure, increased redundant design, improved security, reliability, and take load capacity;
(2) the utility model can select different modes to control the on and off of the MOS tube according to different working conditions, thereby improving the stability of the output voltage of the whole power circuit;
(3) the utility model adopts the power redundancy module, realizes the electrical redundancy design, effectively prevents one path from being damaged and not working, and improves the protection capability of the switch power supply;
(4) the utility model adopts a novel transformer winding technology, improves the stability of each path of output voltage of the switch power supply, and changes the performance problem caused by sudden change of load;
(5) the utility model adds a protection module, realizes the measurement of the voltage, current and frequency of the output end and the load end of the transformer, is beneficial to the high-performance work of the MOS tube and the transformer, and improves the controllability and reliability of the switch power supply;
(6) the utility model discloses a rectification filtering afterflow circuit, and on the diode selection, in order to make the temperature coefficient reach the uniformity, selected the parallelly connected encapsulation of binary diode, when having realized the resistant stream to the diode, guaranteed its heating coefficient's uniformity, improved switching power supply's life-span and performance.
Drawings
Fig. 1 is a schematic structural diagram of a high-performance flyback switching power supply circuit.
Fig. 2 is a flowchart of the operation of the high-performance flyback switching power supply circuit.
In the figure: 1-performance control module, 2-power redundancy module, 3-protection module, 4-rectification module, 5-transformer module, 51-first primary coil, 52-second primary coil, 53-secondary coil and 54-magnet.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
Referring to fig. 1, in an embodiment of the present invention, a high performance flyback switching power supply circuit includes a performance control module 1, a power redundancy module 2, a protection module 3, and a transformer module 5, where the performance control module 1 is connected to the power redundancy module 2, the power redundancy module 2 is connected to the transformer module 5, the performance control module 1 is further connected to the protection module 3, and the protection module 3 is connected to the transformer module 5 at the same time;
the power redundancy module 2 comprises a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a freewheeling diode D1, a freewheeling diode D2, a chopping power MOS transistor Q1 and a chopping power MOS transistor Q2, wherein the cathode of the freewheeling diode D1 is connected with one end of a capacitor C1 and one end of a resistor R1, the capacitor C1 and the resistor R1 are connected in parallel, the anode of the freewheeling diode D1 is connected with the drain of the chopping MOS transistor Q1, the cathode of the freewheeling diode D2 is connected with one end of a capacitor C2 and one end of a resistor R2, the capacitor C2 and the resistor R2 are connected in parallel, the anode of the freewheeling diode D2 is connected with the drain of the chopping MOS transistor Q2, the sources of the chopping MOS transistor Q1 and the chopping MOS transistor Q2 are both grounded, and the power redundancy module 2 serves as a transformer switching circuit and can play a role of backup, and can effectively improve transient performance under the cooperation of the performance control module 1;
the transformer module 5 comprises a transformer, and the transformer consists of a first primary coil 51, a second primary coil 52, a secondary coil 53 and a magnet 54 arranged between the second primary coil 52 and the secondary coil 53;
the transformer module 5 is used for transmitting and storing energy of the whole switching power supply, and ensures that corresponding energy is provided for subsequent loads, the transformer module 5 changes the previous winding mode, two strands of the first primary coil 51 and the second primary coil 52 are wound in parallel, when the winding is completed by one turn, the first primary coil 51 and the second primary coil 52 are continuously wound in the left-right direction exchange direction, and so on, and meanwhile, the secondary coil 53 is ensured to be wound at the middle position of the first primary coil 51 and the second primary coil 52;
in order to ensure that the diameter of the coil needs to meet the requirement of load current and ensure the insulation grade and the anti-interference capability, the transformer in the transformer module 5 should be designed and selected according to the specification;
the other ends of the capacitor C1, the capacitor C2, the resistor R1 and the resistor R2 are connected with a first primary coil 51 and a second primary coil 52 of the transformer, and the anodes of the fly-wheel diode D1 and the fly-wheel diode D2 are respectively connected with the first primary coil 51 and the second primary coil 52;
the performance control module 1 adopts a programmable chip as a control chip, the performance control module 1 is connected with gate poles of a chopping MOS tube Q1 and a chopping MOS tube Q2 and is used for follow current of primary side current of the transformer, simultaneously chopping bus voltage, controlling voltage input of the primary side and carrying out redundancy design on a switch MOS tube and a follow current device, so that when one group of chopping switches is damaged, the other chopping switch continues to work, and meanwhile, two groups of chopping MOS work cooperatively, so that the output performance is ensured; the performance control module 1 is further connected with the protection module 3, the protection module 3 is connected with the secondary coil 53 in the transformer module 5, the protection module 3 is used for detecting load change and output current and voltage of a transformer, the protection module 3 ensures transient performance of a power supply, and safety and reliability of the switching power supply are ensured.
Example 2
Referring to fig. 1, in an embodiment of the present invention, a high performance flyback switching power supply circuit includes a performance control module 1, a power redundancy module 2, a protection module 3, and a transformer module 5, where the performance control module 1 is connected to the power redundancy module 2, the power redundancy module 2 is connected to the transformer module 5, the performance control module 1 is further connected to the protection module 3, and the protection module 3 is connected to the transformer module 5 at the same time;
the power redundancy module 2 comprises a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a freewheeling diode D1, a freewheeling diode D2, a chopping power MOS transistor Q1 and a chopping power MOS transistor Q2, wherein the cathode of the freewheeling diode D1 is connected with one end of a capacitor C1 and one end of a resistor R1, the capacitor C1 and the resistor R1 are connected in parallel, the anode of the freewheeling diode D1 is connected with the drain of the chopping MOS transistor Q1, the cathode of the freewheeling diode D2 is connected with one end of a capacitor C2 and one end of a resistor R2, the capacitor C2 and the resistor R2 are connected in parallel, the anode of the freewheeling diode D2 is connected with the drain of the chopping MOS transistor Q2, the sources of the chopping MOS transistor Q1 and the chopping MOS transistor Q2 are both grounded, and the power redundancy module 2 serves as a transformer switching circuit and can play a role of backup, and can effectively improve transient performance under the cooperation of the performance control module 1;
the transformer module 5 comprises a transformer, and the transformer consists of a first primary coil 51, a second primary coil 52, a secondary coil 53 and a magnet 54 arranged between the second primary coil 52 and the secondary coil 53;
the transformer module 5 is used for transmitting and storing energy of the whole switching power supply, and ensures that corresponding energy is provided for subsequent loads, the transformer module 5 changes the previous winding mode, two strands of the first primary coil 51 and the second primary coil 52 are wound in parallel, when the winding is completed by one turn, the first primary coil 51 and the second primary coil 52 are continuously wound in the left-right direction exchange direction, and so on, and meanwhile, the secondary coil 53 is ensured to be wound at the middle position of the first primary coil 51 and the second primary coil 52;
in order to ensure that the diameter of the coil needs to meet the requirement of load current and ensure the insulation grade and the anti-interference capability, the transformer in the transformer module 5 should be designed and selected according to the specification;
the other ends of the capacitor C1, the capacitor C2, the resistor R1 and the resistor R2 are connected with a first primary coil 51 and a second primary coil 52 of the transformer, and the anodes of the fly-wheel diode D1 and the fly-wheel diode D2 are respectively connected with the first primary coil 51 and the second primary coil 52;
the performance control module 1 adopts a programmable chip as a control chip, the performance control module 1 is connected with gate poles of a chopping MOS tube Q1 and a chopping MOS tube Q2 and is used for follow current of primary side current of the transformer, simultaneously chopping bus voltage, controlling voltage input of the primary side and carrying out redundancy design on a switch MOS tube and a follow current device, so that when one group of chopping switches is damaged, the other chopping switch continues to work, and meanwhile, two groups of chopping MOS work cooperatively, so that the output performance is ensured; the performance control module 1 is further connected with the protection module 3, the protection module 3 is connected with the secondary coil 53 in the transformer module 5, the protection module 3 is used for detecting load change and output current and voltage of a transformer, the protection module 3 ensures transient performance of a power supply, and safety and reliability of the switching power supply are ensured.
The difference between this embodiment and embodiment 1 is that the present embodiment further includes a rectifier module 4, the rectifier module 4 is composed of a rectifier diode D3 and an energy storage capacitor C3, the rectifier diode D3 is a diode packaged in parallel with two bodies, an anode of the rectifier diode D3 is connected to the secondary coil 53 in the transformer module 5, a cathode of the rectifier diode D3 is connected to the energy storage capacitor C3 and is connected to the output terminal Vout, the other end of the energy storage capacitor C3 is grounded, and the rectifier module 4 rectifies and stores pulsating current output by the transformer, converts the pulsating current into smooth direct current meeting performance requirements, and provides the smooth direct current to a load.
Referring to fig. 2, a working method of a high-performance flyback switching power supply circuit includes the following steps:
s1, before the performance control module 1 is powered on, each variable is initialized
S2, detecting data such as voltage, current, and frequency on the transformer side and the load side based on the data output from the protection module 3;
s3, if the detection result of the step S2 accords with the design parameter index of the power supply, continuing to work according to the current working mode, if the detection result is abnormal, carrying out corresponding PWM control according to the detected abnormal variable;
specifically, in this embodiment, the PWM control includes changing the switching time, the switching frequency, and the switching sequence of the chopping power MOS transistor Q1 and the chopping power MOS transistor Q2, so as to meet the requirement of the design index, and to enable the output voltage and current to be output smoothly without dropping.
The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (9)
1. The utility model provides a high performance flyback switching power supply circuit, its characterized in that, including performance control module (1), power redundancy module (2), protection module (3) and transformer module (5), performance control module (1) links to each other with power redundancy module (2), power redundancy module (2) link to each other with transformer module (5), performance control module (1) still links to each other with protection module (3), protection module (3) link to each other with transformer module (5) simultaneously.
2. The high-performance flyback switching power supply circuit according to claim 1, wherein the power redundancy module (2) comprises a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a freewheeling diode D1, a freewheeling diode D2, a chopping power MOS Q1 and a chopping power MOS Q2, a cathode of the freewheeling diode D1 is connected to one end of the capacitor C1 and one end of the resistor R1, the capacitor C1 and the resistor R1 are connected in parallel, an anode of the freewheeling diode D1 is connected to a drain of the chopping power MOS Q1, a cathode of the freewheeling diode D2 is connected to one end of the capacitor C2 and one end of the resistor R2, the capacitor C2 and the resistor R2 are connected in parallel, and an anode of the freewheeling diode D2 is connected to a drain of the chopping power MOS Q2.
3. The high-performance flyback switching power supply circuit according to claim 2, wherein the sources of the chopping MOS transistor Q1 and the chopping MOS transistor Q2 are both grounded.
4. The high performance flyback switching power supply circuit according to claim 2, wherein the transformer module (5) comprises a transformer consisting of a first primary coil (51), a second primary coil (52), a secondary coil (53), and a magnet (54) disposed between the second primary coil (52) and the secondary coil (53).
5. The high performance flyback switching power supply circuit according to claim 4, wherein the first primary coil (51) and the second primary coil (52) are wound in parallel two times, and the secondary coil (53) is wound at a position intermediate the first primary coil (51) and the second primary coil (52).
6. The high performance flyback switching power supply circuit according to claim 5, wherein the other ends of the capacitor C1, the capacitor C2, the resistor R1 and the resistor R2 are connected to the first primary coil (51) and the second primary coil (52) of the transformer.
7. The high-performance flyback switching power supply circuit according to claim 6, wherein anodes of the freewheeling diode D1 and the freewheeling diode D2 are connected to the first primary coil (51) and the second primary coil (52), respectively.
8. The flyback switching power supply circuit of claim 5, wherein the performance control module (1) is connected to the gates of the chopper MOS transistor Q1 and chopper MOS transistor Q2; the performance control module (1) is also connected with the protection module (3), and the protection module (3) is connected with a secondary coil (53) in the transformer module (5).
9. The flyback switching power supply circuit of claim 8, further comprising a rectifier module (4), wherein the rectifier module (4) is composed of a rectifier diode D3 and an energy storage capacitor C3, the rectifier diode D3 is a diode packaged in parallel with two bodies, an anode of the rectifier diode D3 is connected to the secondary winding (53) of the transformer module (5), a cathode of the rectifier diode D3 is connected to the energy storage capacitor C3 and the output terminal Vout, and the other end of the energy storage capacitor C3 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020394231.6U CN211908658U (en) | 2020-03-25 | 2020-03-25 | High-performance flyback switching power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020394231.6U CN211908658U (en) | 2020-03-25 | 2020-03-25 | High-performance flyback switching power supply circuit |
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| CN211908658U true CN211908658U (en) | 2020-11-10 |
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| CN202020394231.6U Active CN211908658U (en) | 2020-03-25 | 2020-03-25 | High-performance flyback switching power supply circuit |
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