CN208767992U - AC power source - Google Patents
AC power source Download PDFInfo
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- CN208767992U CN208767992U CN201820287759.6U CN201820287759U CN208767992U CN 208767992 U CN208767992 U CN 208767992U CN 201820287759 U CN201820287759 U CN 201820287759U CN 208767992 U CN208767992 U CN 208767992U
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Abstract
The utility model discloses a kind of AC power sources, including shell, main circuit board is equipped in shell, main circuit board is equipped with AC power circuit, AC power circuit includes ac power input end, bridge rectifier, controllable accurate source of stable pressure, first zener diode, second diode, first metal-oxide-semiconductor, first resistor, first capacitor, second electrolytic capacitor and voltage output end, one ac input end of bridge rectifier and the zero line of ac power input end connect, another ac input end of bridge rectifier and the zero line side of ac power input end connect, one DC output end of bridge rectifier anode with the second diode respectively, one end of first resistor, the anode of second electrolytic capacitor is connected with voltage output end, the cathode of second diode is connect with the reference pole of controllable accurate source of stable pressure.This practical circuit structure is relatively simple, hardware cost is lower, the safety and reliability of circuit is higher.
Description
Technical field
The utility model relates to field of power supplies, in particular to a kind of AC power source.
Background technique
AC power source refers to, to connect the alternating current of alternating current offer, being made household electrical appliance using plug and socket and being taken
Device workable for formula small device is powered.Attaching plug has rodlike or copper sheet shape pin end outstanding, is physically inserted into
There is the power outlet of the female connector type of slot or pothole.Generally there are firewire (hole is shorter), neutral wire terminal (hole on plug
It is longer), partially there are also ground joint (central circular holes).Firewire and the neutral conductor, and some are not distinguished especially there are many plug
Connector has multiple firewires.These connectors may plate copper, tin, nickel, and power outlet is the female connector for having slot or pothole, use
There is the attaching plug insertion outstanding of rodlike or copper sheet shape to allow, by electric power through plug conductive to electric appliance.Traditional AC power source
Circuit part structure is complicated, hardware cost is higher.In addition, since traditional AC power source lacks corresponding circuit protection function
Can, cause the safety and reliability of circuit not high.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of circuit knot
Structure is relatively simple, hardware cost is lower, the higher AC power source of the safety and reliability of circuit.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of AC power source, including shell are constructed,
Main circuit board is equipped in the shell, the main circuit board is equipped with AC power circuit, and the AC power circuit includes handing over
Flow power input, bridge rectifier, controllable accurate source of stable pressure, the first zener diode, the second diode, the first metal-oxide-semiconductor, the
One resistance, first capacitor, the second electrolytic capacitor and voltage output end, an ac input end of the bridge rectifier with it is described
The zero line of ac power input end connects, another ac input end of the bridge rectifier and the AC power source input
The zero line side at end connects, a DC output end of the bridge rectifier respectively with the anode of second diode, first
One end of resistance, the second electrolytic capacitor anode connected with voltage output end, the cathode of second diode and described controllable
The reference pole of precision voltage regulator connects, the anode of the controllable accurate source of stable pressure and another DC output end of bridge rectifier
It is grounded, the cathode of controllable accurate source of stable pressure connects with the cathode of the other end of the first resistor and the first zener diode respectively
It connects, the anode of first zener diode is connect with the grid of one end of the first capacitor and the first metal-oxide-semiconductor respectively, described
The source grounding of the other end of first capacitor and the first metal-oxide-semiconductor, the drain electrode of first metal-oxide-semiconductor and second electrolytic capacitor
Cathode connection, the model S-701T of second diode.
In AC power source described in the utility model, the AC power circuit further includes third diode, and described
The anode of three diodes is connect with the anode of second diode, cathode and the first resistor of the third diode
One end connection, the model S-352T of the third diode.
In AC power source described in the utility model, the AC power circuit further includes second resistance, and described second
One end of resistance is connect with the cathode of the controllable accurate source of stable pressure, and the other end of the second resistance is electric with described first respectively
The connection of the cathode of the other end of resistance and the first zener diode, the resistance value of the second resistance are 25k Ω.
In AC power source described in the utility model, the AC power circuit further includes the 4th diode, and described
The anode of four diodes is connect with one end of the first resistor, the cathode and second electrolytic capacitor of the 4th diode
Anode connection, the model E-101L of the 4th diode.
In AC power source described in the utility model, first metal-oxide-semiconductor is N-channel MOS pipe.
The AC power source for implementing the utility model has the advantages that due to being equipped with main circuit board, main electricity in shell
Road plate is equipped with AC power circuit, and AC power circuit includes ac power input end, bridge rectifier, controllable accurate pressure stabilizing
Source, the first zener diode, the second diode, the first metal-oxide-semiconductor, first resistor, first capacitor, the second electrolytic capacitor and voltage are defeated
Outlet, for the AC power circuit relative to traditional AC power source, the component used is less, can reduce in this way hardware at
This, in addition, the second diode is used to carry out current-limiting protection, therefore circuit structure is relatively simple, hardware cost is lower, the peace of circuit
Full property and reliability are higher.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram of AC power circuit in the utility model AC power source one embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In the utility model AC power source embodiment, which includes shell, is equipped with main circuit board in shell, should
Main circuit board is equipped with AC power circuit, and the circuit diagram of the AC power circuit is as shown in Figure 1.In Fig. 1, the alternating current
Source circuit includes ac power input end, bridge rectifier Z, controllable accurate source of stable pressure U1, the first zener diode D1, the two or two
Pole pipe D2, the first metal-oxide-semiconductor Q1, first resistor R1, first capacitor C1, the second electrolytic capacitor C2 and voltage output end Vo, wherein bridge
The zero line L connection of an ac input end and ac power input end of formula rectifier Z, another friendship of bridge rectifier Z
The zero line side N connection of input terminal and ac power input end is flowed, a DC output end of bridge rectifier Z is respectively with the two or two
The anode of pole pipe D2, one end of first resistor R1, the second electrolytic capacitor C2 anode connected with voltage output end Vo, the two or two pole
The cathode of pipe D2 is connect with the reference pole of controllable accurate source of stable pressure U1, the anode and bridge rectifier Z of controllable accurate source of stable pressure U1
Another DC output end be grounded, the cathode of controllable accurate source of stable pressure U1 respectively with the other end of first resistor R1 and first
The cathode of zener diode D1 connects, the anode of the first zener diode D1 respectively with one end of first capacitor C1 and the first MOS
The grid of pipe Q1 connects, the source grounding of the other end of first capacitor C1 and the first metal-oxide-semiconductor Q1, the drain electrode of the first metal-oxide-semiconductor Q1
It is connect with the cathode of the second electrolytic capacitor C2.
The AC power circuit is relative to traditional AC power source, and the component used is less, and circuit structure is more simple
It is single, hardware cost can be reduced in this way.Second diode D2 is Current Limiting Diodes, for a direct current to bridge rectifier Z
Branch between output end and the reference pole of controllable accurate source of stable pressure U1 carries out route protection, therefore the safety of circuit and reliable
Property is higher.It is noted that in the present embodiment, the model S-701T of the second diode D2, certainly, in practical applications,
Second diode D2 can also have the diode of similar functions using other models.
In the present embodiment, the alternating voltage of ac power input end input is alternating current 220V.When electrical equipment power-up, hand over
Stream 220V is rectified by bridge rectifier Z, and rectifier power source is by first resistor R1 and the first zener diode D1 to first
Capacitor C1 charging, the first metal-oxide-semiconductor Q1 from off state to conducting status transition.The alternating voltage pair of ac power input end input
Capacitor in electrical equipment slowly charges, and achievees the purpose that Anti-surging electric current.It, can be by selecting not according to different load capacitances
Same resistance value control time constant carries out the inhibition of current surge.
When ac power input end input alternating voltage in the normal range when, the AC power circuit work normal
State.First zener diode D1 is breakdown.First metal-oxide-semiconductor Q1 conducting, controllable accurate source of stable pressure U1 cut-off.
If the alternating voltage of ac power input end input increases, causing rectified voltage is more than that the voltage after rectification is protected
Thresholding is protected, the reference pole tension of controllable accurate source of stable pressure U1 is more than controllable accurate source of stable pressure U1 internal reference voltage.Controllable accurate
Source of stable pressure U1 conducting, cathode voltage decline, the first zener diode D1 cut-off.No current flows into first capacitor C1, the first MOS
The gate-source pole tension of pipe Q1 is 0V, and the first metal-oxide-semiconductor Q1 cut-off, output loop disconnection, high voltage can not be added to be loaded below,
Have the function that electric voltage over press is protected.
It is noted that the first metal-oxide-semiconductor Q1 is N-channel MOS pipe in the present embodiment.Certainly, in practical applications,
One metal-oxide-semiconductor Q1 can also use P-channel metal-oxide-semiconductor, but at this moment the structure of circuit also will accordingly change.
In the present embodiment, which further includes third diode D3, the anode and second of third diode D3
The anode of diode D2 connects, and the cathode of third diode D3 is connect with one end of first resistor R1.Third diode D3 is limited
Diode is flowed, carries out current-limiting protection for a DC output end to bridge rectifier Z and the branch between first resistor R1,
To further enhance the safety and reliability of circuit.It is noted that in the present embodiment, the model of third diode D3
S-352T, certainly, in practical applications, third diode D3 can also have the diode of similar functions using other models.
In the present embodiment, which further includes second resistance R2, one end of second resistance R2 and controllable accurate
The cathode of source of stable pressure U1 connects, the other end of second resistance R2 respectively with the other end of first resistor R1 and the first zener diode
The cathode of D1 connects.Second resistance R2 is current-limiting resistance, for carrying out current limliting guarantor to the branch where controllable accurate source of stable pressure U1
Shield, further to enhance the safety and reliability of circuit.It is noted that in the present embodiment, the resistance of second resistance R2
Value is 25k Ω, and certainly, in practical applications, the resistance value of second resistance R2 can also adjust accordingly as the case may be.
In the present embodiment, which further includes the 4th diode D4, the anode and first of the 4th diode D4
One end of resistance R1 connects, and the cathode of the 4th diode D4 is connect with the anode of the second electrolytic capacitor C2.4th diode D4 is
Current Limiting Diodes carry out current limliting guarantor for the branch between the DC output end and voltage output end Vo to formula rectifier Z
Shield, so that the safety and reliability of circuit is further enhanced.It is noted that in the present embodiment, the four or two pole
The model E-101L of pipe D4, certainly, in practical applications, the 4th diode D4 can also have similar function using other models
The diode of energy.
In short, in the present embodiment, the AC power circuit relative to traditional AC power source, the component that uses compared with
Few, circuit structure is relatively simple, can reduce hardware cost in this way.In addition, Current Limiting Diodes are equipped in the AC power circuit,
Therefore the safety and reliability of circuit is higher.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (5)
1. a kind of AC power source, which is characterized in that including shell, main circuit board is equipped in the shell, on the main circuit board
Equipped with AC power circuit, the AC power circuit includes ac power input end, bridge rectifier, controllable accurate pressure stabilizing
Source, the first zener diode, the second diode, the first metal-oxide-semiconductor, first resistor, first capacitor, the second electrolytic capacitor and voltage are defeated
One ac input end of outlet, the bridge rectifier is connect with the zero line of the ac power input end, the bridge-type
Another ac input end of rectifier is connect with the zero line side of the ac power input end, and one of the bridge rectifier
DC output end respectively with the anode of second diode, one end of first resistor, the second electrolytic capacitor anode and voltage
Output end connection, the cathode of second diode are connect with the reference pole of the controllable accurate source of stable pressure, the controllable accurate
The anode of source of stable pressure and another DC output end of bridge rectifier are grounded, the cathode of controllable accurate source of stable pressure respectively with institute
State first resistor the other end and the first zener diode cathode connection, the anode of first zener diode respectively with institute
The one end for stating first capacitor is connected with the grid of the first metal-oxide-semiconductor, and the source electrode of the other end of the first capacitor and the first metal-oxide-semiconductor is equal
Ground connection, the drain electrode of first metal-oxide-semiconductor are connect with the cathode of second electrolytic capacitor, the model S- of second diode
701T。
2. AC power source according to claim 1, which is characterized in that the AC power circuit further includes the three or two pole
Pipe, the anode of the third diode connect with the anode of second diode, the cathode of the third diode with it is described
One end of first resistor connects, the model S-352T of the third diode.
3. AC power source according to claim 2, which is characterized in that the AC power circuit further includes second resistance,
One end of the second resistance is connect with the cathode of the controllable accurate source of stable pressure, the other end of the second resistance respectively with institute
The cathode connection of the other end and the first zener diode of first resistor is stated, the resistance value of the second resistance is 25k Ω.
4. AC power source according to claim 3, which is characterized in that the AC power circuit further includes the four or two pole
Pipe, the anode of the 4th diode connect with one end of the first resistor, the cathode of the 4th diode and described the
The anode connection of two electrolytic capacitors, the model E-101L of the 4th diode.
5. AC power source according to any one of claims 1 to 4, which is characterized in that first metal-oxide-semiconductor is N-channel
Metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820287759.6U CN208767992U (en) | 2018-02-28 | 2018-02-28 | AC power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820287759.6U CN208767992U (en) | 2018-02-28 | 2018-02-28 | AC power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208767992U true CN208767992U (en) | 2019-04-19 |
Family
ID=66125016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820287759.6U Active CN208767992U (en) | 2018-02-28 | 2018-02-28 | AC power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208767992U (en) |
-
2018
- 2018-02-28 CN CN201820287759.6U patent/CN208767992U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211215 Address after: 510000 room 1232, No. 4, Yuanjing Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: Guangzhou zhongdiantong Technology Co.,Ltd. Address before: 510000 room b403, No. 16, datanggang Road, Jingxi street, Baiyun District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU ZHICHENG INFORMATION TECHNOLOGY CO.,LTD. |