CN202818092U - Power adapter capable of suppressing electromagnetic interference - Google Patents
Power adapter capable of suppressing electromagnetic interference Download PDFInfo
- Publication number
- CN202818092U CN202818092U CN 201220403235 CN201220403235U CN202818092U CN 202818092 U CN202818092 U CN 202818092U CN 201220403235 CN201220403235 CN 201220403235 CN 201220403235 U CN201220403235 U CN 201220403235U CN 202818092 U CN202818092 U CN 202818092U
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- shield shell
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Abstract
The utility model discloses a power adapter capable of suppressing electromagnetic interference. The power adapter is simple in structure and reasonable in design, and comprises an upper shell and a lower shell, wherein an accommodating cavity is formed between the upper shell and the lower shell; a shielding shell, an insulating shell and a printed circuit board (PCB) are arranged in the accommodating cavity; the shielding shell is tightly adhered to the upper shell and the lower shell; the PCB is arranged in the insulating shell; the insulating shell is arranged between the PCB and the shielding shell; an anti-interference module circuit is arranged on the PCB; and the anti-interference module circuit comprises a first Y capacitor and a second Y capacitor. The power adapter is compact in structure, low in cost, light in weight, energy-saving, environmentally-friendly and high in economic benefits; and due to the comprehensive design of the structure and the circuit on the PCB, the electromagnetic interference of a switching power supply on external equipment can be effectively reduced, and thus the matching stability and compatibility of the external equipment are achieved.
Description
Technical field
The utility model relates to the switch power technology field, particularly relates to a kind of capable of suppressing electromagnetic interference power supply adaptor.
Background technology
Switching Power Supply is to utilize modern power electronics technology, and the time ratio that the control switch pipe turns on and off is kept a kind of power supply of regulated output voltage.Switching Power Supply generally is made of pulse width modulation (PWM) control IC and MOSFET.Along with development and the innovation of power electronic technology, so that switch power technology is also in constantly innovation.
But, can produce low-order harmonic during Switching Power Supply work, particularly relatively be difficult to overcome in this scope of frequency 0.15MHz ~ 300MHz, if this harmonic wave exceeds the sensitivity that it cooperates product, will produce disturb equipment, (Source Music AM frequency range is 520KHz ~ 1600KHz) can't work thereby make equipment.
Mostly the scheme that mainly solves at present this type of interference is that (50HZ ~ 60HZ) or powered battery cooperate this type of end product with power frequency supply.The shortcoming of power frequency supply itself is that volume is heavy, and voltage stabilized range is narrow, and to the consumption large (mainly being copper and silicon steel sheet) of source material, and along with the raising of present stage to energy-conservation requirement, a lot of power frequency supplies can not adapt to the requirement of energy-conserving and environment-protective.Battery has service time restriction, and after being finished as can not in time reclaim, can producing environment and pollute.Therefore, traditional Switching Power Supply serious interference has a strong impact on the result of use of equipment, and the conduction of too high electromagnetism and radiation meeting damage human body.
Summary of the invention
Based on this, be necessary the problem for the shortcoming of prior art, a kind of capable of suppressing electromagnetic interference power supply adaptor is provided, it is simple in structure, and is reasonable in design, has good antijamming capability, and energy-conserving and environment-protective are good with stability and the compatibility of terminal equipment coupling.
A kind of capable of suppressing electromagnetic interference power supply adaptor, comprise upper shell and lower house, consist of an accommodating cavity between described upper shell and the lower house, be provided with shield shell, insulation shell and pcb board in the described accommodating cavity, described shield shell is close to described upper shell and lower house, described pcb board is arranged in the described insulation shell, and described insulation shell is arranged at position between described pcb board and the shield shell; Described pcb board is provided with the immunity module circuit, and described immunity module circuit comprises a Y electric capacity and the 2nd Y electric capacity.
Among embodiment, described shield shell comprises shield shell and lower shield shell therein, and described upper shield shell is close to described upper shell, and described lower shield shell is close to described lower house; Described insulation shell comprises the first insulation shell and the second insulation shell, and described the first insulation shell is located at position between described upper shield shell and the pcb board, and described the second insulation shell is located at position between described lower shield shell and the pcb board.
Among embodiment, the elementary creepage distance between described pcb board and the described shield shell is greater than 5mm therein, and described pcb board one end points is connected with the DC line.
Therein among embodiment, described immunity module circuit one end is electrically connected in AC input module circuit, the other end of described immunity module circuit is electrically connected in secondary output module circuit, described AC input module circuit is electrically connected in the EMI circuit, described EMI circuit is electrically connected in the input rectifying filter circuit, described input rectifying filter circuit is electrically connected in transformer, described transformer one end is electrically connected in secondary output module circuit by output rectification circuit, the other end of described transformer is electrically connected in pulse modulation controller by switching tube, described pulse modulation controller is electrically connected in power supply circuits and isolation feedback circuit, and described isolation feedback circuit is electrically connected in described secondary output module circuit.
Among embodiment, the material of described shield shell is copper or aluminium therein, and the material of described insulation shell is plastic cement.
Among embodiment, described shield shell is electrically connected in described secondary output module circuit therein.
Therein among embodiment, a described Y electric capacity and the 2nd Y electric capacity have at least one to be electrically connected between described AC input module circuit and the secondary output module circuit, the resistance R A of described Y electric capacity electrical connection, the resistance R B of described the 2nd Y electric capacity electrical connection, a described Y electric capacity and the 2nd Y electric capacity also can directly be electrically connected with AC input module circuit without resistance R A or RB.
Above-mentioned a kind of capable of suppressing electromagnetic interference power supply adaptor, its structural design is simple, reasonable, by the design of the circuit synthesis on its structure and the pcb board, can effectively reduce Switching Power Supply to the electromagnetic interference of external equipment, and then reach stable and compatible with the coupling of external equipment.Simultaneously, its compact conformation, cheap, lightweight, energy-conserving and environment-protective, economic benefit is high, can obviously reduce the radiation to human body, thus the human and environment around protecting to greatest extent.
Described pcb board is arranged in the insulation shell, and described insulation shell periphery is provided with shield shell, and simultaneously, described shield shell is electrically connected in described secondary output module circuit, and then interference signal is introduced power supply, disturbs thereby reduce externally.The utility model is convenient to install, and uses safety, and good in anti-interference performance has improved reliability.
Description of drawings
Fig. 1 is the utility model STRUCTURE DECOMPOSITION figure.
Fig. 2 is the utility model structural representation.
Fig. 3 is the circuit diagram of the utility model pcb board.
Below be the explanation of the utility model parts sign flag:
Embodiment
For further understanding feature of the present utility model, technological means and the specific purposes that reach, function, resolve advantage of the present utility model and spirit, by below in conjunction with accompanying drawing and embodiment detailed description of the present utility model being further understood.
Such as Figure of description 1 and shown in Figure 2, the utility model comprises upper shell 110 and lower house 120, consists of an accommodating cavity between described upper shell 110 and the lower house 120, is provided with shield shell 200, insulation shell 300 and pcb board 400 in the described accommodating cavity.Described shield shell 200 is close to described upper shell 110 and lower house 120, and described pcb board 400 is arranged in the described insulation shell 300, and described insulation shell 300 is arranged at position between described pcb board 400 and the shield shell 200.The material of described shield shell 200 is copper or aluminium, and the material of described insulation shell 300 is plastic cement.
Described shield shell 200 comprises shield shell 210 and lower shield shell 220, described upper shield shell 210 is close to described upper shell 110, described lower shield shell 220 is close to described lower house 120, and described upper shell 110 and lower house 120 are coated on described shield shell 200 peripheries.
Described insulation shell 300 comprises the first insulation shell 310 and the second insulation shell 320, described the first insulation shell 310 is located at position between described upper shield shell 210 and the pcb board 400, and described the second insulation shell 320 is located at position between described lower shield shell 220 and the pcb board 400.Described shield shell 200 is coated on the periphery of described insulation shell 300, and described insulation shell 300 coats described pcb board 400.Described insulation shell 300 makes elementary creepage distance between described pcb board 400 and the described shield shell 200 greater than 5mm, and described pcb board 400 1 end points are connected with DC line 500.
Shown in Figure of description, described pcb board 400 is provided with the immunity module circuit, described immunity module circuit one end is electrically connected in AC input module circuit, the other end of described immunity module circuit is electrically connected in secondary output module circuit, described AC input module circuit is electrically connected in the EMI circuit, described EMI circuit is electrically connected in the input rectifying filter circuit, described input rectifying filter circuit is electrically connected in transformer, described transformer one end is electrically connected in secondary output module circuit by output rectification circuit, the other end of described transformer is electrically connected in pulse modulation controller by switching tube, described pulse modulation controller is electrically connected in power supply circuits and isolation feedback circuit, and described isolation feedback circuit is electrically connected in described secondary output module circuit.
Described immunity module circuit comprises a Y electric capacity and the 2nd Y electric capacity, the resistance R A of described Y electric capacity electrical connection, the resistance R B of described the 2nd Y electric capacity electrical connection.A described Y electric capacity and the 2nd Y electric capacity have at least one to be electrically connected between described AC input module circuit and the secondary output module circuit; A described Y electric capacity and the 2nd Y electric capacity also can directly be electrically connected with AC input module circuit by a end and b end without resistance R A or RB.
Described immunity module circuit comprises a Y electric capacity and the 2nd Y electric capacity, but is not limited to this two electric capacity, can comprise the more Y electric capacity such as the 3rd Y electric capacity.
The electrical connection method of described immunity module circuit and described AC input module circuit and secondary output module circuit comprises following several:
The first is that a end of a described Y electric capacity is electrically connected L end or the N end in the described AC input module circuit, and the c end of a described Y electric capacity is electrically connected in described secondary output module circuit;
The second is that the b end of described the 2nd Y electric capacity is electrically connected L end or the N end in the described AC input module circuit, and the c end of a described Y electric capacity is electrically connected in described secondary output module circuit;
The third is the L end in the described AC input module circuit of a end electrical connection of a described Y electric capacity, the N end in the described AC input module circuit of b end electrical connection of described the 2nd Y electric capacity, the described secondary output module circuit of c end electrical connection;
The 4th kind is the N end in the described AC input module circuit of a end electrical connection of a described Y electric capacity, the L end in the described AC input module circuit of b end electrical connection of described the 2nd Y electric capacity, the described secondary output module circuit of c end electrical connection.
Described shield shell 200 is electrically connected in described secondary output module circuit.
In sum, the utility model is simple and reasonable for structure, be provided with jamproof shield shell 200 between described upper shell 110 and the lower house 120, be provided with insulation shell 300 between described pcb board 400 and the described shield shell 200, make safe distance between described pcb board 400 and the described shield shell 200 greater than 5mm.
Described pcb board 400 is provided with the immunity module circuit, by the design of the circuit synthesis on its structure and the pcb board 400, can effectively reduce Switching Power Supply to the electromagnetic interference of external equipment, and then reaches stable and compatible with the coupling of external equipment.It is cheap, and is lightweight, energy-conserving and environment-protective, and economic benefit is high, can obviously reduce the radiation to human body, thus the human and environment around protecting to greatest extent.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (6)
1. capable of suppressing electromagnetic interference power supply adaptor, comprise upper shell and lower house, consist of an accommodating cavity between described upper shell and the lower house, it is characterized in that, be provided with shield shell, insulation shell and pcb board in the described accommodating cavity, described shield shell is close to described upper shell and lower house, and described pcb board is arranged in the described insulation shell, and described insulation shell is arranged at position between described pcb board and the shield shell; Described pcb board is provided with the immunity module circuit, and described immunity module circuit comprises a Y electric capacity and the 2nd Y electric capacity.
2. a kind of capable of suppressing electromagnetic interference power supply adaptor according to claim 1, it is characterized in that, described shield shell comprises shield shell and lower shield shell, and described upper shield shell is close to described upper shell, and described lower shield shell is close to described lower house; Described insulation shell comprises the first insulation shell and the second insulation shell, and described the first insulation shell is located at position between described upper shield shell and the pcb board, and described the second insulation shell is located at position between described lower shield shell and the pcb board.
3. a kind of capable of suppressing electromagnetic interference power supply adaptor according to claim 1 is characterized in that, the elementary creepage distance between described pcb board and the described shield shell is greater than 5mm, and described pcb board one end points is connected with the DC line.
4. a kind of capable of suppressing electromagnetic interference power supply adaptor according to claim 1, it is characterized in that, described immunity module circuit one end is electrically connected in AC input module circuit, the other end of described immunity module circuit is electrically connected in secondary output module circuit, described AC input module circuit is electrically connected in the EMI circuit, described EMI circuit electrical connection has the input rectifying filter circuit, described input rectifying filter circuit is electrically connected in transformer, described transformer one end is electrically connected in secondary output module circuit by output rectification circuit, the other end of described transformer is electrically connected in pulse modulation controller by switching tube, described pulse modulation controller is electrically connected in power supply circuits and isolation feedback circuit, and described isolation feedback circuit is electrically connected in described secondary output module circuit.
5. a kind of capable of suppressing electromagnetic interference power supply adaptor according to claim 1 is characterized in that, the material of described shield shell is copper or aluminium, and the material of described insulation shell is plastic cement.
6. a kind of capable of suppressing electromagnetic interference power supply adaptor according to claim 1 is characterized in that, described shield shell is electrically connected in described secondary output module circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220403235 CN202818092U (en) | 2012-08-15 | 2012-08-15 | Power adapter capable of suppressing electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220403235 CN202818092U (en) | 2012-08-15 | 2012-08-15 | Power adapter capable of suppressing electromagnetic interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202818092U true CN202818092U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220403235 Expired - Fee Related CN202818092U (en) | 2012-08-15 | 2012-08-15 | Power adapter capable of suppressing electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202818092U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780405A (en) * | 2012-08-15 | 2012-11-14 | 陈才华 | Power adapter capable of suppressing electromagnetic interference |
-
2012
- 2012-08-15 CN CN 201220403235 patent/CN202818092U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780405A (en) * | 2012-08-15 | 2012-11-14 | 陈才华 | Power adapter capable of suppressing electromagnetic interference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20150815 |
|
| EXPY | Termination of patent right or utility model |