TW201909539A - power converter - Google Patents

Abstract

A power converter includes a primary board, a primary circuit, a transformer, a secondary board, a secondary circuit, a bridge board and a bridge circuit. The primary circuit is sited on the primary board and generates a primary power based on the AC input power and the control signal. The transformer is electrically connected to the primary circuit to receive the primary power and generates secondary power. The secondary circuit is sited on the secondary board and is coupled to the transformer to receive the secondary side power. The secondary circuit generates a DC output power and generates a feedback signal based on the DC output power. The bridge board is coupled between the primary board and the secondary board. The bridge circuit is sited on the bridge board and is electrically connected between the primary circuit and the secondary circuit to receive the feedback signal and generates a control signal based on the feedback signal.

Description

Power converter

The invention relates to a converter, in particular to a power converter.

Existing power converters have the following disadvantages:

1. Large volume: The primary side circuit and the secondary side circuit of the existing power converter are all located on the same plane, so that the overall volume is large, and the demand for thinness and shortness required on the market cannot be achieved.

2. In order to comply with the safety design, the quality of the power converter is affected: the primary side circuit and the secondary side circuit of the existing power converter are all on the same plane, so in order to comply with the safety design, the primary side circuit and the second time are often The circuit board between the side circuits adds more than one slot to reduce electromagnetic interference between the primary side circuit and the secondary side circuit. However, the groove is prone to carbon deposition problem, and It is easy to cause the board to be insufficient in strength and fragile.

Accordingly, it is an object of the present invention to provide a power converter that is small in size.

Thus, the power converter of the present invention comprises a primary side plate, a primary side circuit, a transformer, a secondary side plate, a secondary side circuit, a bridge plate and a bridge circuit.

The primary side circuit is disposed on the primary side plate, and is electrically connected to an AC voltage source that supplies an AC input power to receive the AC input power from the AC voltage source, and receives a control signal, and according to the control signal and the AC input power produces a primary side power.

The transformer is electrically connected to the primary side circuit to receive the primary side power, and generates a secondary side power according to the primary side power adjustment power level.

The secondary side plate is located on a different plane from the primary side plate.

The secondary side circuit is disposed on the secondary side plate, and is electrically connected to the transformer to receive the secondary side power, and accordingly generates a DC output power, and generates a signal indicating the DC output power according to the DC output power. A feedback signal of a voltage value and a current value.

The bridge plate has two opposite sides, and the two sides are respectively connected to one side of the primary side plate and one side of the secondary side plate, so that the primary side plate, the bridge plate and the secondary side plate together form one A U-shaped space that accommodates space.

The bridge circuit is disposed on the bridge board and electrically connected between the primary side circuit and the secondary side circuit to receive the feedback signal, and is generated according to the voltage value indicated by the feedback signal and the magnitude of the current value. The control signal.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 1 and 2, a first embodiment of the power converter 1 of the present invention comprises a primary side panel 11, a primary side circuit 12, a transformer 13, a secondary side panel 14, a secondary side circuit 15, and a bridge. A board 16, a bridge circuit 18 and a spacer 19.

The primary side circuit 12 is disposed on the primary side board 11 and electrically connected to an AC voltage source AC for supplying an AC input power to receive the AC input power from the AC voltage source AC, and receives a control signal Sc, and A primary side power is generated based on the control signal Sc and the alternating input power.

The transformer 13 is disposed on the primary side plate 11 and electrically connected to the primary side circuit 12 to receive the primary side power, and generates a secondary side power according to the primary side power adjustment power level.

The secondary side plate 14 and the primary side plate 11 are located on different planes and are arranged in parallel.

The secondary side circuit 15 is disposed on the secondary side plate 14 and electrically connected to the transformer 13 to receive the secondary side power, and accordingly generates a DC output power Vo, and generates an indication according to the DC output power Vo. A voltage value of the DC output power Vo and a feedback signal Sf of a current value.

The bridge board 16 has two opposite side edges 161, 162 at opposite ends of the upper and lower sides, and the distance between the two side edges 161, 162 is at least 7 mm, and the side edges 111 of the primary side panel 11 are respectively connected to the second side. One side 141 of the side plate 14 causes the primary side plate 11, the bridge plate 16 and the secondary side plate 14 to form a U-shape having an accommodating space 17, so that the transformer 13, the primary side circuit 12 and the The secondary side circuit 15 is disposed in the accommodating space 17, and the volume of the power converter 1 of the present invention can be greatly reduced.

The bridge circuit 18 is disposed on the bridge board 16 and electrically connected between the primary side circuit 12 and the secondary side circuit 15 to receive the feedback signal Sf, and according to the voltage value indicated by the feedback signal Sf The magnitude of the current value generates the control signal Sc for the primary side circuit 12. When the voltage value indicated by the feedback signal Sf received by the bridge circuit 18 is insufficient or the current value is too large, the operation of the control signal Sc The duty cycle will become larger, the duty cycle will be increased or the operating frequency fs (operation frequency) will be increased, and both can increase the energy exchange. The bridge circuit 18 is a high-voltage process integrated chip. And includes a secondary side controller 181, and a primary side controller 182.

The secondary side controller 181 is disposed on the bridge board 16 and electrically connected to the secondary side circuit 15 to receive the feedback signal Sf, and according to the voltage value indicated by the feedback signal Sf and the magnitude of the current value, An adjustment signal Sm outputted in the manner of magnetic field transmission is generated.

The primary side controller 182 is disposed on the bridge board 16 and electrically connected to the primary side circuit 12, and receives the adjustment signal Sm, and generates the control signal Sc according to the magnitude of the adjustment signal Sm, and one of the control signals Sc The pulse width is related to the magnitude of the adjustment signal Sm.

The spacer 19 is made of an insulating material and has a thickness of at least 0.4 mm, and is disposed between the primary side circuit 12 and the secondary side circuit 15 in the accommodating space 17 for isolating and maintaining the primary side. The insulating member 19 has a first extending surface 191 extending from the one side 112 of the primary side plate 11 adjacent to the accommodating space 17 toward the secondary side plate 14 and the insulating effect between the circuit 12 and the secondary side circuit 15. An isolation surface 193 extending from a side edge 192 of the first extension surface 191 away from the primary side panel 11 away from the bridge plate 16 and a side 194 away from the bridge surface 16 from the isolation surface 193 The secondary side panel 14 extends a second extension surface 195.

The primary side circuit 12 and the secondary side circuit 15 are respectively disposed on the primary side plate 11 and the secondary side plate 14 which is different from the primary side plate 11 and spaced apart by at least 7 mm, and can be held by the spacer 19 The insulation effect between the primary side circuit 12 and the secondary side circuit 15 is therefore easier to conform to the safety design of the power converter 1 of the present invention.

In addition, it should be noted that the primary side circuit 12 and the secondary side circuit 15 may be respectively disposed on the primary side plate 11 and the secondary side plate 14 opposite to the accommodating space 17 according to designer design requirements. On the outer side.

In summary, the power converter 1 of the present invention has the following advantages:

1. Small in size: the primary side circuit 12, the secondary side circuit 15 and the bridge board 16 together surround the accommodating space 17 for the primary side circuit 12, the voltage leveler 13, and the secondary side circuit 15 And placing the primary side circuit 12 and the secondary side circuit 15 on different planes, and further utilizing the bridge circuit 18 as a bridge between the primary side circuit 12 and the secondary side circuit 15, so that the power converter of the present invention The volume of 1 can be greatly reduced.

2. Easy to comply with the safety design: the primary side circuit 12 and the secondary side circuit 15 of the power converter 1 of the present invention are respectively disposed on the primary side plate 11 and the secondary side plate 14, and the primary side plate 11 and the secondary The side plates 14 are respectively located on different planes and have a spacing of at least 7 mm, so that it is easier to maintain the requirements of the safety design. Further, the spacers 19 are used to isolate the primary side circuit 12 and the secondary side circuit 15 to reduce the primary side circuit. The electromagnetic interference between 12 and the secondary side circuit 15 can indeed achieve the object of the present invention.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

1‧‧‧Power Converter

181‧‧‧secondary controller

11‧‧‧One side panel

182‧‧‧primary side controller

112‧‧‧ Face

19‧‧‧Isolation

12‧‧‧primary circuit

191‧‧‧First extension

13‧‧‧Transformers

192‧‧‧ side

14‧‧‧second side panel

193‧‧ ‧ isolation surface

141‧‧‧ side

194‧‧‧ side

15‧‧‧secondary circuit

195‧‧‧Second extension

16‧‧‧Bridge board

AC‧‧‧AC voltage source

161‧‧‧ side

Sc‧‧‧ control signal

162‧‧‧ side

Sf‧‧‧ feedback signal

17‧‧‧ accommodating space

Sm‧‧‧Adjustment signal

18‧‧‧Bridge circuit

Vo‧‧‧DC output power

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is a schematic diagram illustrating an embodiment of a power converter of the present invention; and FIG. 2 is a block diagram illustrating A block diagram of this embodiment of the power converter of the present invention.

Claims (10)

A power converter comprising: a primary side plate; a primary side circuit disposed on the primary side plate and electrically connected to an AC voltage source supplying an AC input power to receive the AC input power from the AC voltage source, and Receiving a control signal, and generating a primary side power according to the control signal and the alternating current input power; a transformer electrically connecting the primary side circuit to receive the primary side power, and adjusting a power level according to the primary side power to generate a second Secondary side power; a secondary side plate located on a different plane from the primary side plate; a secondary side circuit disposed on the secondary side plate and electrically connected to the transformer to receive the secondary side power and thereby generate a direct current Outputting power, and generating a feedback signal indicating a voltage value and a current value of the DC output power according to the DC output power; a bridge board having two opposite sides, and the two sides are respectively connected to one of the primary side plates a side edge and a side of the secondary side plate, the primary side plate, the bridge plate and the secondary side plate are co-shaped a U-shaped type having a receiving space; and a bridge circuit disposed on the bridge board and electrically connected between the primary side circuit and the secondary side circuit to receive the feedback signal, and according to the feedback signal The indicated voltage value and the magnitude of the current value produce the control signal. The power converter of claim 1, wherein the bridge circuit comprises a secondary side controller disposed on the bridge board, and electrically connected to the secondary side circuit to receive the feedback signal, and according to the feedback signal The indicated voltage value and the magnitude of the current value generate an adjustment signal, and a primary side controller is disposed on the bridge board, and is electrically connected to the primary side circuit, and receives the adjustment signal, and according to the adjustment signal The magnitude of the control signal is generated, and a pulse width of the control signal is related to the magnitude of the adjustment signal. The power converter of claim 1, wherein the adjustment signal is output to the primary side controller in a magnetic field transmission manner. The power converter of claim 1, wherein the primary side circuit is located in the accommodating space and is disposed on the primary side panel. The power converter of claim 1, wherein the secondary side circuit is located in the accommodating space and is disposed on the secondary side plate. The power converter of claim 1, further comprising a spacer disposed in the accommodating space and disposed between the primary side circuit and the secondary side circuit for isolating and maintaining the primary The insulation effect between the side circuit and the secondary side circuit. The power converter of claim 6, wherein the spacer has a first extension surface extending from a side of the primary side panel adjacent to the accommodating space toward the secondary side panel, and a first extension surface extending from the first extension surface An isolation surface extending away from the side of the primary side plate in a direction away from the bridge plate, and a second extension surface extending from the side of the isolation surface away from the side of the bridge plate toward the secondary side plate. The power converter of claim 1, wherein the distance between the two sides of the bridge plate is at least 7 mm. A power converter comprising: a primary side plate; a primary side circuit disposed on the primary side plate and electrically connected to an alternating voltage source and generating a primary side power; a transformer electrically connected to the primary side circuit to receive the primary circuit Side power, and generate a secondary side power; a secondary side plate, located in a different plane from the primary side plate; a secondary side circuit disposed on the secondary side plate and electrically connected to the transformer to receive the secondary side power And generating a DC output power; and a bridge plate having two opposite sides, and the two sides are respectively connected to one side of the primary side plate and one side of the secondary side plate. A power converter comprising: a primary side plate; a secondary side plate located in a different plane from the primary side plate; a bridge plate having two opposite sides, and the two sides are respectively connected to one side of the primary side plate and the One side of the secondary side plate, the primary side plate, the bridge plate and the secondary side plate together define an accommodation space. a primary side circuit disposed on the primary side plate and located in the accommodating space for electrically connecting an AC voltage source and generating a primary side power; and a secondary side circuit disposed on the secondary side plate and located The accommodating space is used to generate a direct current output power.