CN212850250U

CN212850250U - Low-standby-power-consumption switching power supply

Info

Publication number: CN212850250U
Application number: CN202022185741.5U
Authority: CN
Inventors: 席晓琦; 陆明付; 万晓宇; 戴大荣
Original assignee: Wuxi Bao Wei Elecronic Co ltd
Current assignee: Wuxi Bao Wei Elecronic Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-03-30
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to a switching power supply technical field of low stand-by power consumption, and a switching power supply of low stand-by power consumption is disclosed, which comprises a circuit board, the last fixed surface of circuit board is provided with the transformer, the fixed transformer shell that is provided with in the outside of transformer, the inboard of transformer is fixed and is provided with primary, being close to of transformer the inboard of primary is fixed and is provided with secondary. This switching power supply of low standby power consumption, through setting up primary winding, secondary winding, transformer and transformer case, make the utility model discloses have low-power consumption and reducing wear's function, make the sense of leakage reduce more than 50%, and reduced the eddy current loss of transformer when no-load, thereby can effectively reduce switching power supply standby power consumption, reduce transformer copper loss simultaneously, make wire-wound effective sectional area improve greatly, reduce the transformer volume, make the use of transformer safer, reduce the maintenance cost, offer convenience for the user.

Description

Low-standby-power-consumption switching power supply

Technical Field

The utility model relates to a switching power supply technical field of low standby power consumption specifically is a switching power supply of low standby power consumption.

Background

With the increasing importance of energy efficiency and environmental protection, people expect higher standby efficiency of switching power supplies, and customers require power supply products provided by power supply manufacturers to meet green energy standards, for example, the requirements of the european union on the switching power supplies are as follows: the standby power consumption of the switching power supply with rated power of 0.3W-15W, 15W-50W and 50W-75W is respectively less than 0.3W, 0.5W and 0.75W. However, when most of the existing switching power supplies are switched into a light load state and a standby state from a rated load, the power supply efficiency is sharply reduced, and the standby efficiency cannot meet the requirements.

The leakage inductance influence of the conventional switching power supply is particularly obvious in a high-frequency switching state, the leakage inductance influence is generated by the leakage inductance influence, resonance is generated between the leakage inductance influence and a parasitic capacitor of a switching device, the voltage stress and the switching loss of the switching device are greatly improved, the eddy current loss of a transformer is increased, and the service life of the switching device is simultaneously reduced; leakage inductance loss reduces the efficiency of the switching power supply, standby power consumption of the switching power supply is increased, and meanwhile, a winding wire in the original switching power supply can be influenced by a skin effect, so that copper loss of the transformer is reduced, the effective sectional area of a winding is greatly reduced, and the transformer is large in size.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a switching power supply with low standby power consumption, which has the advantages of low power consumption and function of reducing abrasion, solves the problem that the leakage inductance of the existing switching power supply is obviously influenced in a high-frequency switching state, can generate resonance with the parasitic capacitance of a switching device, greatly improves the voltage stress and the switching loss of the switching device, increases the eddy current loss of a transformer, and simultaneously reduces the service life of the switching device; leakage inductance loss reduces the efficiency of the switching power supply, the standby power consumption of the switching power supply is increased, and meanwhile, the influence of the skin effect on a winding wire in the original switching power supply can be possibly caused, so that the copper loss of the transformer is reduced, the effective sectional area of the winding is greatly reduced, and the transformer is large in size.

The utility model provides a following technical scheme: the utility model provides a switching power supply of low stand-by power consumption, includes the circuit board, the last fixed surface of circuit board is provided with the transformer, the fixed transformer shell that is provided with in the outside of transformer, the inboard of transformer is fixed and is provided with primary, being close to of transformer the inboard of primary is fixed and is provided with secondary, the upper surface of circuit board is close to the fixed shell that is provided with in the outside of transformer, the lower fixed surface of circuit board is provided with the mounting panel, the fixed heating panel that is provided with in inside of mounting panel, the fixed connecting seat that is provided with in the outside of mounting panel, the mounting hole has been seted up on.

Preferably, the wires connected with the primary winding and the transformer casing are all multi-strand litz wires, and the auxiliary power supply winding wires are also multi-strand litz wires.

Preferably, the primary winding is uniformly wound for three times, the secondary winding is uniformly wound for two times, and the secondary winding and the primary winding adopt an alternate winding structure.

Preferably, a fixing opening is formed in the mounting plate, the area of the fixing opening is consistent with that of the heat dissipation plate, and the heat dissipation plate is mounted on the inner side of the fixing opening.

Preferably, the number of the connecting seats is two, the number of the mounting holes is four, and the two connecting seats and the four mounting holes are symmetrically distributed along the longitudinal section of the mounting plate.

Preferably, the area of the mounting plate is consistent with that of the circuit board, and the width of the connecting seat is consistent with that of the mounting plate.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this switching power supply of low standby power consumption, through setting up primary winding, secondary winding, transformer and transformer case, make the utility model discloses have the function of low-power consumption, effectively improved switching power supply's practicality, the primary winding of the transformer in the circuit is equallyd divide for the cubic, secondary winding equally divides for twice, adopts the institutional advancement design of coiling in turn, can reduce the leakage inductance to within 2% of transformer inductance, compared with prior art, its leakage inductance reduces more than 50%, and reduced the eddy current loss of transformer when no-load, thereby can effectively reduce switching power supply standby power consumption.

2. This switching power supply of low stand-by power consumption, through setting up primary winding and secondary winding, make the utility model discloses have the function of reducing wear, effectively improved the life of primary winding wire and secondary winding wire, chooseing for use stranded litz wire with the secondary winding and the auxiliary power supply winding wire of transformer, can avoid the influence of skin effect, reduce transformer copper loss, make wire-wound effective sectional area improve greatly, reduce the transformer volume for the use of transformer is safer, the maintenance cost has been reduced, bring the facility for the user.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of a transformer case according to the present invention;

fig. 3 is a schematic structural diagram of the heat dissipating plate of the present invention.

In the figure: 1. mounting a plate; 2. a circuit board; 3. a housing; 4. a transformer; 5. a secondary winding; 6. a primary winding; 7. a transformer housing; 8. a heat dissipation plate; 9. a connecting seat; 10. and (7) installing holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a switching power supply with low standby power consumption includes a circuit board 2, a transformer 4 is fixedly disposed on an upper surface of the circuit board 2, a transformer housing 7 is fixedly disposed on an outer side of the transformer 4, a primary winding 6 is fixedly disposed on an inner side of the transformer 4, a secondary winding 5 is fixedly disposed on an inner side of the transformer 4, which is close to the primary winding 6, a housing 3 is fixedly disposed on an outer side of the upper surface of the circuit board 2, a mounting plate 1 is fixedly disposed on a lower surface of the circuit board 2, a heat dissipation plate 8 is fixedly disposed inside the mounting plate 1, a connecting seat 9 is fixedly disposed on an outer side of the mounting plate 1, and a mounting.

The wires connected with the primary winding 6 and the transformer shell 7 are all multi-strand litz wires, and the wires of the auxiliary power supply winding are also multi-strand litz wires.

The primary winding 6 is uniformly wound for three times, the secondary winding 5 is uniformly wound for two times, and the secondary winding 5 and the primary winding 6 adopt an alternate winding structure.

The inside of mounting panel 1 is seted up fixed mouthful, and the area of fixed mouthful is unanimous with the area of heating panel 8, and heating panel 8 installs the inboard at fixed mouthful.

The number of connecting seat 9 is two, and the number of mounting hole 10 is four, and two connecting seats 9 and four mounting holes 10 are along the longitudinal section symmetric distribution of mounting panel 1.

The area of the mounting plate 1 is consistent with that of the circuit board 2, and the width of the connecting seat 9 is consistent with that of the mounting plate 1.

In the switching power supply, the secondary winding 5 of the transformer 4 and the auxiliary power supply winding lead adopt a plurality of strands of litz wires, the influence of the skin effect can be avoided, the copper loss of the transformer 4 is reduced, the effective sectional area of the winding is greatly improved, the size of the transformer 4 is reduced, the transformer 4 is safer to use, the maintenance cost is reduced, and convenience is brought to a user.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A switching power supply with low standby power consumption comprises a circuit board (2), and is characterized in that: the fixed transformer (4) that is provided with of upper surface of circuit board (2), the fixed transformer case (7) that is provided with in the outside of transformer (4), the inboard fixed primary winding (6) that is provided with of transformer (4), being close to of transformer (4) the inboard fixed secondary winding (5) that is provided with of primary winding (6), the upper surface of circuit board (2) is close to the fixed shell (3) that is provided with in the outside of transformer (4), the lower fixed surface of circuit board (2) is provided with mounting panel (1), the inside fixed heating panel (8) that is provided with of mounting panel (1), the fixed connecting seat (9) that is provided with in the outside of mounting panel (1), mounting hole (10) have been seted up on the surface of connecting seat (9).

2. The switching power supply with low standby power consumption as claimed in claim 1, wherein: and the wires connected with the primary winding (6) and the transformer shell (7) are all multi-strand litz wires, and the auxiliary power supply winding wire is also multi-strand litz wires.

3. The switching power supply with low standby power consumption as claimed in claim 1, wherein: the primary winding (6) is uniformly wound for three times, the secondary winding (5) is uniformly wound for two times, and the secondary winding (5) and the primary winding (6) adopt an alternative winding structure.

4. The switching power supply with low standby power consumption as claimed in claim 1, wherein: the fixed port is formed in the mounting plate (1), the area of the fixed port is consistent with that of the heat dissipation plate (8), and the heat dissipation plate (8) is mounted on the inner side of the fixed port.

5. The switching power supply with low standby power consumption as claimed in claim 1, wherein: the number of the connecting seats (9) is two, the number of the mounting holes (10) is four, and the connecting seats (9) and the mounting holes (10) are symmetrically distributed along the longitudinal section of the mounting plate (1).

6. The switching power supply with low standby power consumption as claimed in claim 1, wherein: the area of the mounting plate (1) is consistent with that of the circuit board (2), and the width of the connecting seat (9) is consistent with that of the mounting plate (1).