CN210578264U - High-frequency switching power supply - Google Patents
High-frequency switching power supply Download PDFInfo
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- CN210578264U CN210578264U CN201921320479.1U CN201921320479U CN210578264U CN 210578264 U CN210578264 U CN 210578264U CN 201921320479 U CN201921320479 U CN 201921320479U CN 210578264 U CN210578264 U CN 210578264U
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- frequency switching
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Abstract
The utility model discloses a high frequency switching power supply, the load simulator comprises a case, first electrically conductive female arranging, the electrically conductive female row of second, a transformer, main control circuit board, three-phase rectifier bridge, the polar plate, chopping module and second rectifier module, first electrically conductive female arranging is relative with the electrically conductive female row of second and establishes and the bottom plate of perpendicular to machine case, first electrically conductive female arranging and the electrically conductive female cartridge of arranging of second are at quick-witted incasement, first electrically conductive female arranging and the electrically conductive one end of arranging of second are connected with main control circuit board, first electrically conductive female arranging and the electrically conductive other end of arranging of second stretch out outside the machine case, first electrically conductive female arranging and the electrically conductive female arranging of second press from both sides between and establish a plurality of transformers, chopping module, three-phase rectifier bridge and polar plate are located on the first electrically conductive lateral surface of arranging the transformer of keeping away from, second rectifier module. The utility model provides a distribution of each part of switching power supply is simple, reasonable, and the structure festival gathers together, and is convenient for install, dismantle and maintain, and the radiating effect is good.
Description
Technical Field
The utility model relates to a power supply unit technical field especially relates to a high frequency switching power supply.
Background
At present, with the rapid development of power electronic technology, the relationship between power electronic equipment and the work and life of people is increasingly close, and the electronic equipment cannot be powered by a reliable power supply. Compared with the traditional power frequency direct current power supply, the high-frequency switching power supply has the advantages of small volume, light weight, high efficiency and the like, and is widely applied to occasions of electrolysis, electrochemistry and the like of large current.
At present, a known high-frequency transformer assembly structure of a high-frequency switching power supply is composed of a transformer, a circuit module, a schottky diode or a rectifying tube at the rear of the transformer and at the rectifying part, and the like. The disadvantages of this structure are: the devices are distributed, so that the devices are inconvenient to mount and dismount; the adoption of a Schottky tube or a rectifying tube has larger rectifying loss; the devices are easy to interfere with each other, and the heat dissipation effect is poor.
In order to solve the problems, the high-frequency switching power supply assembly structure with application number 201220248264.5 discloses a high-frequency switching power supply assembly structure, which comprises a case, a conductive double-hole busbar, a transformer, a circuit board and a control trigger circuit, wherein the conductive double-hole busbar, the transformer, the circuit board and the control trigger circuit are arranged in the case; a plurality of transformers are fixedly arranged in the middle of the conductive double-hole busbar which is arranged in parallel, and a circuit board is arranged and fixed on the surface of the transformer.
The high-frequency switching power supply assembly structure adopts a synchronous rectification mode, and uses the power field effect transistor to replace a Schottky tube or a rectification rectifier tube, so that the loss is reduced, and the efficiency is improved; meanwhile, the integrated and modular design is adopted, the installation, the disassembly and the maintenance are convenient, the problems of component fixation and cooling are solved, the parallel arrangement of the conductive double-hole busbar and the arranged shielding iron box effectively enable each component to work independently, and the interference of an electromagnetic field to a line and devices is reduced.
However, the high-frequency switching power supply assembly structure described above has at least the following drawbacks: 1) the two conductive double-hole busbars are arranged in parallel up and down, the transformer is arranged between the two conductive double-hole busbars, and other electrical elements are arranged on the two conductive double-hole busbars to form an upper interlayer structure and a lower interlayer structure, so that the heat dissipation effect of the transformer is reduced; 2) it must know that the frequency of the switch power supply needing to be overhauled is higher, and the upper and lower sandwich structures are more complicated to disassemble when the switch power supply is overhauled, so that the overhaul work is inconvenient to be carried out and the assembly activity is inconvenient to be carried out.
SUMMERY OF THE UTILITY MODEL
For overcoming the defects of the prior art, the utility model discloses a high-frequency switching power supply.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
the embodiment of the utility model discloses a high-frequency switch power supply, which comprises a case, a first conductive bus bar, a second conductive bus bar, a transformer, a main control circuit board, a three-phase rectifier bridge, a polar plate, a chopping module and a second rectifier module, the first conductive busbar and the second conductive busbar are arranged opposite to each other and are perpendicular to the bottom plate of the chassis, the first conductive busbar and the second conductive busbar are inserted in the case, one end of the first conductive busbar and one end of the second conductive busbar are connected with the main control circuit board, the other ends of the first conductive bus bar and the second conductive bus bar extend out of the case, a plurality of transformers are clamped between the first conductive bus bar and the second conductive bus bar, the chopping module, the three-phase rectifier bridge and the polar plate are arranged on the outer side surface of the first conductive bus bar far away from the transformer, and the second rectifier module is arranged on the top fixing surface of the second conductive bus bar;
the input end of the three-phase rectifier bridge is connected with a power grid, and the output end of the three-phase rectifier bridge outputs direct current;
the input end of the polar plate is electrically connected with the output end of the three-phase rectifier bridge, and the output end of the polar plate outputs smooth direct current;
the input end of the chopping module is directly or indirectly electrically connected with the output end of the polar plate, and the output end of the chopping module outputs high-frequency alternating current;
the input end of the transformer is electrically connected with the output end of the chopping module, and the output end of the transformer outputs alternating current after voltage transformation;
the input end of the second rectifying module is electrically connected with the output end of the transformer, and the output end of the second rectifying module outputs direct current;
the second conductive busbar is electrically connected with the output end of the second rectifying module.
As one of the preferable schemes of the utility model, the chopper module comprises an insulated gate bipolar transistor and an IGBT drive board, and the insulated gate bipolar transistor is in signal connection with the IGBT drive board; the second rectifying module comprises a rectifying tube, and the rectifying tube adopts a diode.
Preferably, the insulated gate bipolar transistor is fixedly arranged on the outer side surface of the first conductive busbar far away from the transformer, and the IGBT driver board is fixedly arranged on the bottom plate of the case through a bracket.
Further preferably, the main control circuit board is also fixedly arranged on the bracket.
As one of the preferred schemes of the utility model, the three-phase rectifier bridge set firmly in first electrically conductive female arranging is kept away from on the lateral surface of transformer, first electrically conductive female arranging is kept away from lie in on the lateral surface of transformer filter capacitance has set firmly between three-phase rectifier bridge and the insulated gate bipolar transistor, filter capacitance's input and output respectively with polar plate and insulated gate bipolar transistor connect, and the polar plate respectively with three-phase rectifier bridge and filter capacitance fixed connection.
As one of the preferable schemes of the utility model, the top face of the electrically conductive female row of second outwards extends and sets for the distance and form wide stationary plane, the rectifier tube set firmly in on the wide stationary plane, the electrically conductive copper bar is connected rectifier tube and transformer.
As one of the preferable schemes of the present invention, the high frequency switching power supply further includes a current sensor and a reactor, and the current sensor and the reactor are respectively sleeved on the first conductive bus bar and the second conductive bus bar; and/or the transformer adopts an aluminum shell heat dissipation type transformer.
As one of the preferred schemes of the utility model, this high frequency switching power supply still includes first control transformer and second control transformer, first control transformer and second control transformer are used for respectively for main control circuit board and the power supply of IGBT drive plate, first control transformer and second control transformer install respectively in on the bottom plate of machine case.
As one of the preferred schemes of the utility model, first electrically conductive female arranging is kept away from still set firmly elementary inductance on the lateral surface of transformer, filter capacitance has still set firmly on the bottom plate of machine case, elementary inductance and filter capacitance respectively with the transformer electricity is connected, and the three forms the LLC circuit.
As one of the preferable schemes of the present invention, the first conductive busbar is kept away from the resistor is further fixedly arranged on the outer side surface of the transformer, and the resistor is electrically connected to the insulated gate bipolar transistor.
Compared with the prior art, the utility model discloses at least, following advantage has:
1) the utility model provides a simple reasonable of arranging of each part of switching power supply, the structure festival gathers together.
2) The utility model adopts a synchronous rectification mode, replaces a Schottky tube or a rectification tube with the rectification tube, reduces the loss and improves the efficiency; each part is integrated and modularized, so that the installation, the disassembly and the maintenance are convenient; especially, the first conductive busbar and the second conductive busbar are arranged oppositely, and other parts are respectively arranged on the outer side surface of the first conductive busbar and the top end surface of the second conductive busbar, so that the installation, the disassembly and the maintenance are more facilitated, and the fixation of the parts is solved.
3) The first conductive busbar and the second conductive busbar are arranged oppositely, and other parts are respectively arranged on the outer side surface of the first conductive busbar and the top end surface of the second conductive busbar, so that the heat dissipation area can be increased, and the heat dissipation effect is good.
4) The utility model discloses a two rectifier module (three-phase rectifier bridge and second rectifier module) and a chopper module, three-phase rectifier bridge can be with the at first rectification of electric wire netting alternating current for the direct current, then change the direct current into the high frequency alternating current through the chopper module, and the required transformer volume of high frequency alternating current vary voltage is less, has reduced switching power supply's whole volume, carries out the rectification output through the second rectifier module to the alternating current through transformer vary voltage at last.
5) The filter capacitor, the primary inductor and the transformer form an LLC circuit, the LLC circuit can adjust output under the condition that input voltage and load change in a large range, and meanwhile, the change of the switching frequency is relatively small.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of a high-frequency switching power supply disclosed in an embodiment of the present invention;
fig. 2 is a schematic diagram of an operating principle of a high-frequency switching power supply according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.
Referring to fig. 1, an embodiment of the present invention discloses a high frequency switching power supply, which includes a case 1, a first conductive bus bar 12, a second conductive bus bar 13, a transformer 19, a main control circuit board 6, a three-phase rectifier bridge 8, a pole plate 11, a chopper module (the chopper module includes an insulated gate bipolar transistor 5 and an IGBT driver board 7, the insulated gate bipolar transistor 5 is in signal connection with the IGBT driver board 7), and a second rectifier module (the second rectifier module includes a rectifier tube 16, and a diode), the first conductive bus bar 12 is opposite to the second conductive bus bar 13 and is perpendicular to a bottom plate of the case 1, the first conductive bus bar 12 and the second conductive bus bar 13 are inserted in the case 1, one end of the first conductive bus bar 12 and the second conductive bus bar 13 is connected with the main control circuit board 6, the other end of the first conductive bus bar 12 and the second conductive bus bar 13 extends out of the case 1, a plurality of transformers 19 are clamped between the first conductive bus bar 12 and the second conductive bus bar 13, the chopping module, the three-phase rectifier bridge 8 and the polar plate 11 are arranged on the outer side surface, far away from the transformers 19, of the first conductive bus bar 12, and the second rectifier module is arranged on the top fixing surface of the second conductive bus bar 13;
the input end of the three-phase rectifier bridge 8 is connected with a power grid, and the output end outputs direct current;
the input end of the polar plate 11 is electrically connected with the output end of the three-phase rectifier bridge 8, and the output end outputs smooth direct current;
the input end of the chopping module is directly or indirectly electrically connected with the output end of the polar plate 11, and the output end outputs high-frequency alternating current;
the input end of the transformer 19 is electrically connected with the output end of the chopping module, and the output end of the transformer 19 outputs alternating current after transformation;
the input end of the second rectifying module is electrically connected with the output end of the transformer 19, and the output end of the second rectifying module outputs direct current;
the second conductive busbar 13 is electrically connected with the output end of the second rectifying module.
As one of the preferable schemes of the utility model, the chopper module comprises an insulated gate bipolar transistor 5 and an IGBT drive plate 7, and the insulated gate bipolar transistor 5 is in signal connection with the IGBT drive plate 7; the second rectifying module comprises a rectifying tube 16, and the rectifying tube 16 adopts a diode.
Preferably, the insulated gate bipolar transistor 5 is fixedly arranged on an outer side surface of the first conductive busbar 12 away from the transformer 19, the IGBT driver board 7 is fixedly arranged on a bottom plate of the chassis 1 through a bracket 20, and the main control circuit board 6 is also fixedly arranged on the bracket 20.
As one of the preferred schemes of the utility model, three-phase rectifier bridge 8 sets firmly on the first electrically conductive female lateral surface of arranging 12 and keeping away from transformer 19, and first electrically conductive female arranging 12 is located and has set firmly filter capacitor 18 between three-phase rectifier bridge 8 and insulated gate bipolar transistor 5 on keeping away from transformer 19's the lateral surface, and filter capacitor 18's input and output are connected with polar plate 11 and insulated gate bipolar transistor 5 respectively to polar plate 11 respectively with three-phase rectifier bridge 8 and filter capacitor 18 fixed connection.
As one of the preferable schemes of the present invention, the top end face of the second conductive busbar 13 extends outwards to set the distance to form a wide fixing surface, the rectifier tube 16 is fixed on the wide fixing surface, and the conductive copper bar 17 connects the rectifier tube 16 and the transformer 19.
As one of the preferable schemes of the present invention, the high frequency switching power supply further includes a current sensor 15 and a reactor 14, and the current sensor 15 and the reactor 14 are respectively sleeved on the first conductive bus bar 12 and the second conductive bus bar 13; the current sensor 15 detects the output current and feeds the output current back to the main control circuit board 6, and the reactor 14 can reduce the ripple factor of the output current and make the output current smoother.
As one of the preferred schemes of the utility model, transformer 19 adopts the aluminum hull heat dissipation formula transformer, can do benefit to the heat dissipation.
As one of the preferable schemes of the present invention, the high frequency switching power supply further includes a first control transformer 9 and a second control transformer 10, the first control transformer 9 and the second control transformer 10 are respectively used for supplying power to the main control circuit board 6 and the IGBT drive board 7, and the first control transformer 9 and the second control transformer 10 are respectively installed on the bottom plate of the case 1.
As one of the preferred schemes of the utility model, first electrically conductive female arranging 12 still sets firmly elementary inductance 2 on keeping away from transformer 19's the lateral surface, still sets firmly filter capacitor 20 on machine case 1's the bottom plate, and elementary inductance 2 and filter capacitor 20 are connected with transformer 19 electricity respectively, and the three forms the LLC circuit. LLC circuits can regulate output with wide variations in input voltage and load, while the switching frequency variation is relatively small.
As one of the preferred schemes of the utility model, still set firmly resistor 4 on the lateral surface that transformer 19 was kept away from to first electrically conductive female arranging 12, resistor 4 with insulated gate bipolar transistor 5 electricity is connected, and resistor 4 and filter capacitance 18 constitute the RC circuit, and the RC circuit plays the effect of filtering.
As shown in fig. 2, the working principle of the high-frequency switching power supply provided by the utility model is as follows:
380V alternating current of the power grid is converted into a direct current power supply through a three-phase rectifier bridge 8; the direct current power supply is rectified through the polar plate 11 to obtain a smooth direct current power supply; filtering is carried out through filtering capacitor 18; the chopping module (an insulated gate bipolar transistor 5) chops the rectified direct current into high-frequency alternating current; transformation is performed by a transformer 19; finally, the direct current is rectified again through a second rectifying module (a rectifying tube 16) and is output through the first conductive busbar 12 and the second conductive busbar 13.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A high frequency switching power supply characterized by: the transformer comprises a case, a first conductive bus bar, a second conductive bus bar, a transformer, a main control circuit board, a three-phase rectifier bridge, a polar plate, a chopping module and a second rectifier module, wherein the first conductive bus bar and the second conductive bus bar are arranged oppositely and are vertical to a bottom plate of the case;
the input end of the three-phase rectifier bridge is connected with a power grid, and the output end of the three-phase rectifier bridge outputs direct current;
the input end of the polar plate is electrically connected with the output end of the three-phase rectifier bridge, and the output end of the polar plate outputs smooth direct current;
the input end of the chopping module is directly or indirectly electrically connected with the output end of the polar plate, and the output end of the chopping module outputs high-frequency alternating current;
the input end of the transformer is electrically connected with the output end of the chopping module, and the output end of the transformer outputs alternating current after voltage transformation;
the input end of the second rectifying module is electrically connected with the output end of the transformer, and the output end of the second rectifying module outputs direct current;
the second conductive busbar is electrically connected with the output end of the second rectifying module.
2. A high-frequency switching power supply according to claim 1, characterized in that: the chopper module comprises an insulated gate bipolar transistor and an IGBT drive board, and the insulated gate bipolar transistor is in signal connection with the IGBT drive board; the second rectifying module comprises a rectifying tube, and the rectifying tube adopts a diode.
3. A high-frequency switching power supply according to claim 2, characterized in that: the insulated gate bipolar transistor is fixedly arranged on the outer side face, away from the transformer, of the first conductive busbar, and the IGBT drive board is fixedly arranged on the bottom plate of the case through a support.
4. A high-frequency switching power supply according to claim 3, characterized in that: the main control circuit board is also fixedly arranged on the bracket.
5. A high-frequency switching power supply according to claim 1, characterized in that: the three-phase rectifier bridge set firmly in first electrically conductive female arranging is kept away from on the lateral surface of transformer, first electrically conductive female arranging is kept away from lie in on the lateral surface of transformer three-phase rectifier bridge and insulated gate bipolar transistor have set firmly filter capacitor between, filter capacitor's input and output respectively with polar plate and insulated gate bipolar transistor are connected, and the polar plate respectively with three-phase rectifier bridge and filter capacitor fixed connection.
6. A high-frequency switching power supply according to claim 2, characterized in that: the top end face of the second conductive busbar extends outwards for a set distance to form a wide fixing face, the rectifier tube is fixedly arranged on the wide fixing face, and the conductive copper bar is connected with the rectifier tube and the transformer.
7. A high-frequency switching power supply according to claim 1, characterized in that: the high-frequency switching power supply also comprises a current sensor and a reactor, wherein the current sensor and the reactor are respectively sleeved on the first conductive bus and the second conductive bus; and/or the transformer adopts an aluminum shell heat dissipation type transformer.
8. A high-frequency switching power supply according to claim 1, characterized in that: the high-frequency switching power supply further comprises a first control transformer and a second control transformer, wherein the first control transformer and the second control transformer are respectively used for supplying power to the main control circuit board and the IGBT drive board, and the first control transformer and the second control transformer are respectively installed on the bottom plate of the case.
9. A high-frequency switching power supply according to claim 1, characterized in that: and a primary inductor is fixedly arranged on the outer side surface of the first conductive busbar far away from the transformer, a filter capacitor is fixedly arranged on the bottom plate of the case, the primary inductor and the filter capacitor are respectively and electrically connected with the transformer, and the primary inductor, the filter capacitor and the transformer form an LLC circuit.
10. A high-frequency switching power supply according to claim 2, characterized in that: and a resistor is fixedly arranged on the outer side surface of the first conductive busbar far away from the transformer and is electrically connected with the insulated gate bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921320479.1U CN210578264U (en) | 2019-08-19 | 2019-08-19 | High-frequency switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921320479.1U CN210578264U (en) | 2019-08-19 | 2019-08-19 | High-frequency switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210578264U true CN210578264U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921320479.1U Active CN210578264U (en) | 2019-08-19 | 2019-08-19 | High-frequency switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210578264U (en) |
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2019
- 2019-08-19 CN CN201921320479.1U patent/CN210578264U/en active Active
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