CN206226307U - A kind of direct-current switch power supply circuit - Google Patents
A kind of direct-current switch power supply circuit Download PDFInfo
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- CN206226307U CN206226307U CN201621303824.7U CN201621303824U CN206226307U CN 206226307 U CN206226307 U CN 206226307U CN 201621303824 U CN201621303824 U CN 201621303824U CN 206226307 U CN206226307 U CN 206226307U
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Abstract
The utility model implementation method discloses a kind of direct-current switch power supply circuit, including：EMI circuits, the first current rectifying and wave filtering circuit, power conversion circuit, the second current rectifying and wave filtering circuit, direct current output module is input into over under-voltage protection circuit.It is different from prior art, a kind of direct-current switch power supply circuit that the utility model implementation method is provided, 220V alternating currents are filtered by EMI circuits, rectifying and wave-filtering is carried out by current rectifying and wave filtering circuit, direct current output is carried out by power conversion circuit, then after carrying out secondary rectifying and wave-filtering by current rectifying and wave filtering circuit；There is input over under-voltage protection circuit in input, circuit automatic shutdown circuit is controlled when input voltage is abnormal, circuit automatic restoring circuit is controlled after abnormal disappearance；There is output over under-voltage protection circuit in output end, circuit automatic shutdown circuit is controlled when output voltage is abnormal, circuit automatic restoring circuit is controlled after abnormal disappearance.
Description
Technical field
The utility model implementation method is related to circuit field, more particularly to a kind of direct-current switch power supply circuit.
Background technology
Current civil power is the alternating current for 220v, and alternating current is easy to produce, and generating efficiency is higher to also allow for conveying, can use
Step-up transformer boosts, it is also possible to which step-down transformer is depressured, and can reduce the electric current on power transmission line using high voltage power transmission, subtracts significantly
The electric energy loss of small power transmission line, improves power transmission efficiency.But current most of electronic products is but supplied using low-voltage DC
Electricity, needs that alternating current is changed into direct current by direct-current switch power supply circuit when in use.
Inventor has found that correlation technique has problems with：Existing direct-current switch power supply circuit volume is larger and defeated
Go out power smaller, production cost is high, be unfavorable for using on a large scale.
Utility model content
The utility model implementation method is mainly solving the technical problems that provide a kind of direct-current switch power supply circuit, volume
Small, power is big, is easy to large-scale use.
In order to solve the above technical problems, the technical scheme that the utility model is used is：A kind of dc switch electricity is provided
Source circuit, including：
EMI circuits, the EMI circuits are used to receive ac signal, and the high-frequency interferencing signal in ac signal is entered
Row filtering；
First current rectifying and wave filtering circuit, the current rectifying and wave filtering circuit is connected with EMI circuits, by by the alternating current of EMI circuits
It is converted into direct current；
Power conversion circuit, the power conversion circuit is connected with the first current rectifying and wave filtering circuit, to being filtered by the first rectification
The electric signal of wave circuit carries out power conversion；
Second current rectifying and wave filtering circuit, second current rectifying and wave filtering circuit is connected with power conversion circuit, to whole by second
The ac signal for flowing filter circuit is converted into DC signal；
Direct current output module, exports to the electric signal by the second current rectifying and wave filtering circuit；
Input over under-voltage protection circuit, the input over under-voltage protection circuit is connected with the first current rectifying and wave filtering circuit, is used for
Detect whether abnormal by the electric signal of the first current rectifying and wave filtering circuit, it is exception such as to detect, then send interrupt signal.
Wherein, the direct-current switch power supply is further included：
Control circuit, the control circuit is input into over under-voltage protection circuit, the control circuit and institute with described respectively
Output module connection is stated, the electric signal by input over under-voltage protection circuit or output module is received.
Wherein, output module is further included：DC output circuit, current-limiting protection circuit, output over under-voltage protection circuit,
Voltage sample circuit, short-circuit protection circuit and loop of voltage regulation circuit.
Wherein,
The current-limiting protection circuit, output over under-voltage protection circuit, voltage sample circuit, short-circuit protection circuit respectively with institute
DC output circuit connection is stated, the DC output circuit is connected with the second current rectifying and wave filtering circuit.
Wherein, the DC output circuit is received and exported by after the DC signal of the second current rectifying and wave filtering circuit.
Wherein,
Current-limiting protection circuit, receives by the electric signal of DC output circuit, will not mistake for the electric current in limiting circuit
Greatly；
Output over under-voltage protection circuit, receives by the electric signal of DC output circuit, for detecting by direct current output
Whether the electric signal of circuit is abnormal, and it is exception such as to detect, then send interrupt signal.
Wherein,
Voltage sample circuit, receives the electric signal of DC output circuit, and electric signal is obtained from DC output circuit, and detection is straight
Flow output circuit magnitude of voltage, and with compensation, it is ensured that the stabilization of output voltage.
Short-circuit protection circuit, receives the electric signal of DC output circuit, is detecting the electric current that is short-circuited in circuit loop
When excessive, shutoff signal is sent, cut off circuit.
Wherein, current-limiting protection circuit, output over under-voltage protection circuit, short-circuit protection circuit are connected with control circuit respectively.
Wherein, it is connected with control circuit again after loop of voltage regulation circuit is connected with voltage sample circuit.
Wherein, loop of voltage regulation circuit, electric signal is obtained from voltage sample circuit, Mobile state adjustment is entered to voltage so that defeated
The voltage for going out is into a stationary value.
The beneficial effect of the utility model implementation method is：Prior art is different from, the utility model implementation method is provided
A kind of direct-current switch power supply circuit, 220V alternating currents are filtered by EMI circuits, are carried out by current rectifying and wave filtering circuit once whole
Stream filtering, direct current output is carried out by power conversion circuit, then after carrying out secondary rectifying and wave-filtering by current rectifying and wave filtering circuit；In input
There is input over under-voltage protection circuit at end, and circuit automatic shutdown circuit is controlled when input voltage is abnormal, and electricity is controlled after abnormal disappearance
Road automatic restoring circuit；Have a voltage sampling feedback circuit in output end, real-time detection voltage output and with compensation, it is ensured that output electricity
The stabilization of pressure；There is output over under-voltage protection circuit in output end, circuit automatic shutdown circuit is controlled when output voltage is abnormal, it is different
Circuit automatic restoring circuit is controlled after often disappearing；In output end current limiting and short-circuit protection circuit, when output current exception time control
Circuit automatic shutdown circuit processed, controls circuit automatic restoring circuit after abnormal disappearance.Small volume, output power is cheap,
Can be widely used in other products, be protected with overvoltage/undervoltage, voltage compensation, the function such as current-limiting protection.
Brief description of the drawings
Fig. 1 is a kind of structured flowchart of direct-current switch power supply circuit that the utility model implementation method is provided.
Specific embodiment
For the ease of understanding the utility model, with reference to the accompanying drawings and detailed description, the utility model is carried out more
Detailed description.It should be noted that when element is expressed " being fixed on " another element, it can directly in another element
Above or therebetween there may be one or more elements placed in the middle.When an element is expressed " connection " another element, it can
To be directly to another element or there may be one or more elements placed in the middle therebetween.This specification is used
Term " vertical ", " level ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, this specification is used all of technology and scientific terminology with belong to skill of the present utility model
The implication that the technical staff in art field is generally understood that is identical.In art used in the description of the present utility model in this specification
Language is intended merely to describe the purpose of specific embodiment, is not intended to limit the utility model.The art that this specification is used
Language "and/or" includes the arbitrary and all of combination of one or more related Listed Items.
Refering to Fig. 1, a kind of direct-current switch power supply circuit that the utility model implementation method is provided includes：
EMI (Electro Magnetic Interference, electromagnetic interference) circuit 11, the first current rectifying and wave filtering circuit 12,
Power conversion circuit 13, the second current rectifying and wave filtering circuit 14, output module 15, input over under-voltage protection circuit 16 and control circuit
17, wherein EMI circuits 11 are connected with the first current rectifying and wave filtering circuit 12, the first current rectifying and wave filtering circuit 12 respectively with power conversion circuit
13 and input over under-voltage protection circuit 16 connect, power conversion circuit 13 respectively with control the rectifying and wave-filtering of circuit 17 and second
Circuit 14 is connected, and the second current rectifying and wave filtering circuit 14 is connected with output module 15, and output module 15 is connected with control circuit 17.
EMI circuits 11, the low-pass filter circuit being made up of current-limiting reactor and shnt capacitor, its effect is to access
The alternating current of 220v, it is allowed to electric current electricity frequency signal access arrangement, filters to high-frequency signal, and the interference signal to high frequency has
Larger inhibition.
First current rectifying and wave filtering circuit 12, will be direct current by the AC conversion of EMI circuits 11.Using the list of diode
The alternating voltage of positive and negative change is changed into unidirectional pulsating volage to electric conductivity.Commutation diode is periodically turned on and ended, and is obtained
To Rectified alternating current.In the positive half cycle of power supply, diode conducting makes the electric current in load identical with voltage waveform shape；
In the negative half period of supply voltage, diode is in reverse blocking state, bears power supply negative half period voltage, and load voltage is almost
Zero.
Power conversion circuit 13, power conversion is carried out to the electric signal by the first current rectifying and wave filtering circuit 12.
Second current rectifying and wave filtering circuit 14, is filtered again to the electric signal by power conversion circuit 13, by direct current
Signal is converted into ac signal.The alternating voltage of positive and negative change is changed into unidirectional pulsation by the unilateral conduction using diode
Voltage.Commutation diode is periodically turned on and ended, and obtains Rectified alternating current.In the positive half cycle of power supply, diode conducting makes
Electric current in load is identical with voltage waveform shape；In the negative half period of supply voltage, diode is in reverse blocking state,
Power supply negative half period voltage is born, load voltage is almost nil.
Direct current output module 15, exports to the electric signal by the second current rectifying and wave filtering circuit 14.
Direct current output module 15 is further included：DC output circuit 151, current-limiting protection circuit 152, output overvoltage/undervoltage are protected
Protection circuit 153, voltage sample circuit 154, short-circuit protection circuit 155, loop of voltage regulation circuit 156, wherein, current-limiting protection circuit
152nd, output over under-voltage protection circuit 153, voltage sample circuit 154, short-circuit protection circuit 155 respectively with DC output circuit
151 connection, current-limiting protection circuit 152, output over under-voltage protection circuit 153, short-circuit protection circuit 155 respectively with control circuit 16
Connection.Loop of voltage regulation circuit 156 is connected with control circuit 16 again after being connected with voltage sample circuit 154.
DC output circuit 151, is exported for receiving by after the DC signal of the second current rectifying and wave filtering circuit 14.
Current-limiting protection circuit 152, receives by the electric signal of DC output circuit 151, will not be excessive for the electric current in limiting circuit,
So as to ensure the work safety of other components.Output over under-voltage protection circuit 153, receives by DC output circuit 151
Electric signal, whether abnormal by the electric signal of DC output circuit 151 for detecting, it is exception such as to detect, then send interruption
Signal, cuts off circuit.Voltage sample circuit 154, receives the electric signal of DC output circuit 151, is obtained from DC output circuit 151
Power taking signal, detect DC output circuit 151 magnitude of voltage, and with compensation, it is ensured that the stabilization of output voltage.Short-circuit protection circuit
155, receive DC output circuit 151 electric signal, detect be short-circuited in circuit loop electric current it is excessive when, send cut-out
Signal, cuts off circuit.Loop of voltage regulation circuit 156, for obtaining electric signal from voltage sample circuit, Mobile state tune is entered to voltage
It is whole so that the voltage of output is into a stationary value.
Input over under-voltage protection circuit 16, it is whether abnormal by the electric signal of the first current rectifying and wave filtering circuit 12 for detecting,
It is exception such as to detect, then send interrupt signal, cuts off circuit.
Control circuit 17, receives the electric signal by input over under-voltage protection circuit 16 or output module 15, on the one hand
Sampled from output module 15, be compared with setting value, then send control signal to power conversion circuit 13, on the other hand,
According to the circuit signal of input over under-voltage protection circuit 16, through differentiating, there is provided control signal is protected to power conversion signal
Measure.
EMI circuits 11 are accessed after the alternating current of 220V, high-frequency interferencing signal are filtered, then the first rectifying and wave-filtering
Circuit 11 carries out first time rectifying and wave-filtering, and AC signal is become into direct current signal, if while now electric signal exception, is input into
Over under-voltage protection circuit 16 sends interrupt signal, cuts off circuit.As now electric signal is normal, power conversion circuit 13 carries out power
Conversion, electric signal is amplified, and then the second current rectifying and wave filtering circuit 14 carries out secondary rectifying and wave-filtering, and ac signal is changed
Into DC signal.Then DC output circuit 151 exports DC signal.Current-limiting protection circuit 152, receives by direct current
The electric signal of output circuit 151, the electric current in limiting circuit will not be excessive.Output over under-voltage protection circuit 153, receives by straight
The electric signal of output circuit 151 is flowed, whether detection is abnormal by the electric signal of DC output circuit 151, and it is exception such as to detect,
Interrupt signal is then sent, circuit is cut off.Voltage sample circuit 154, receives the electric signal of DC output circuit 151, defeated from direct current
Go out circuit 151 and obtain electric signal, detect the magnitude of voltage of DC output circuit 151, and keep the magnitude of voltage.Short-circuit protection circuit
155, receive DC output circuit 151 electric signal, detect be short-circuited in circuit loop electric current it is excessive when, send cut-out
Signal, cuts off circuit.Loop of voltage regulation circuit 156, for obtaining electric signal from voltage sample circuit, Mobile state tune is entered to voltage
It is whole so that the voltage of output is into a stationary value.Control circuit 17 receives control electric signal, carries out the cut-out and conducting of circuit.
It is different from prior art, a kind of direct-current switch power supply circuit that the utility model implementation method is provided, 220V exchanges
Electricity is filtered by EMI circuits, a rectifying and wave-filtering is carried out by current rectifying and wave filtering circuit, by power conversion circuit, then by whole
Stream filter circuit carries out direct current output after carrying out secondary rectifying and wave-filtering；There is input over under-voltage protection circuit in input, work as input
Circuit automatic shutdown circuit is controlled during electric voltage exception, circuit automatic restoring circuit is controlled after abnormal disappearance；There is voltage in output end
Sampling feedback circuit, real-time detection voltage output and with compensation, it is ensured that the stabilization of output voltage；There is output overvoltage/undervoltage in output end
Protection circuit, circuit automatic shutdown circuit is controlled when output voltage is abnormal, and circuit automatic restoring circuit is controlled after abnormal disappearance；
In output end current limiting and short-circuit protection circuit, circuit automatic shutdown circuit is controlled when output current is abnormal, after abnormal disappearance
Control circuit automatic restoring circuit.Small volume, output power is cheap, can be widely used in other products, tool
There is overvoltage/undervoltage to protect, voltage compensation, the function such as current-limiting protection.
It should be noted that given in specification of the present utility model and its accompanying drawing of the present utility model preferably implementing
Mode, but, the utility model can be realized by many different forms, however it is not limited to the implementation described by this specification
Mode, these implementation methods are not as the extra limitation to the utility model content, there is provided the purpose of these implementation methods is to make
Understanding to disclosure of the present utility model is more thorough comprehensive.Also, above-mentioned each technical characteristic continues to be mutually combined, formed
The various implementation methods not being enumerated above, are accordingly to be regarded as the scope of the utility model specification record；Further, to this area
For those of ordinary skill, can according to the above description be improved or be converted, and all these modifications and variations should all belong to
The protection domain of the utility model appended claims.
Claims (10)
1. a kind of direct-current switch power supply circuit, it is characterised in that including：
EMI circuits, the EMI circuits are used to receive ac signal, and the high-frequency interferencing signal in ac signal was carried out
Filter；
First current rectifying and wave filtering circuit, the current rectifying and wave filtering circuit is connected with EMI circuits, by by the AC conversion of EMI circuits
It is direct current；
Power conversion circuit, the power conversion circuit is connected with the first current rectifying and wave filtering circuit, to by the first rectifying and wave-filtering electricity
The electric signal on road carries out power conversion；
Second current rectifying and wave filtering circuit, second current rectifying and wave filtering circuit is connected with power conversion circuit, to being filtered by the second rectification
The ac signal of wave circuit is converted into DC signal；
Direct current output module, exports to the electric signal by the second current rectifying and wave filtering circuit；
Input over under-voltage protection circuit, the input over under-voltage protection circuit is connected with the first current rectifying and wave filtering circuit, for detecting
Whether the electric signal by the first current rectifying and wave filtering circuit is abnormal, and it is exception such as to detect, then send interrupt signal.
2. direct-current switch power supply circuit according to claim 1, it is characterised in that it is further included：
Control circuit, the control circuit respectively with the input over under-voltage protection circuit, the control circuit and described defeated
Go out module connection, receive the electric signal by input over under-voltage protection circuit or output module.
3. direct-current switch power supply circuit according to claim 1 and 2, it is characterised in that output module is further included：Directly
Stream output circuit, current-limiting protection circuit, output over under-voltage protection circuit, voltage sample circuit, short-circuit protection circuit and voltage stabilizing
Loop circuit.
4. direct-current switch power supply circuit according to claim 3, it is characterised in that
The current-limiting protection circuit, output over under-voltage protection circuit, voltage sample circuit, short-circuit protection circuit are straight with described respectively
Stream output circuit connection, the DC output circuit is connected with the second current rectifying and wave filtering circuit.
5. direct-current switch power supply circuit according to claim 4, it is characterised in that the DC output circuit is received and passed through
Exported after the DC signal of the second current rectifying and wave filtering circuit.
6. direct-current switch power supply circuit according to claim 4, it is characterised in that
Current-limiting protection circuit, receives by the electric signal of DC output circuit, will not be excessive for the electric current in limiting circuit；
Output over under-voltage protection circuit, receives by the electric signal of DC output circuit, for detecting by DC output circuit
Electric signal it is whether abnormal, it is exception such as to detect, then send interrupt signal.
7. direct-current switch power supply circuit according to claim 6, it is characterised in that
Voltage sample circuit, receives the electric signal of DC output circuit, and electric signal is obtained from DC output circuit, and detection direct current is defeated
Go out the magnitude of voltage of circuit, and with compensation, it is ensured that the stabilization of output voltage；
Short-circuit protection circuit, receives the electric signal of DC output circuit, and be short-circuited in circuit loop electric current excessive to detect
When, shutoff signal is sent, cut off circuit.
8. direct-current switch power supply circuit according to claim 3, it is characterised in that current-limiting protection circuit, output overvoltage/undervoltage
Protection circuit, short-circuit protection circuit are connected with control circuit respectively.
9. direct-current switch power supply circuit according to claim 3, it is characterised in that loop of voltage regulation circuit and voltage sampling electricity
It is connected with control circuit again after the connection of road.
10. direct-current switch power supply circuit according to claim 9, it is characterised in that loop of voltage regulation circuit, from voltage sampling
Circuit obtains electric signal, Mobile state adjustment is entered to voltage so that the voltage of output is into a stationary value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621303824.7U CN206226307U (en) | 2016-11-30 | 2016-11-30 | A kind of direct-current switch power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621303824.7U CN206226307U (en) | 2016-11-30 | 2016-11-30 | A kind of direct-current switch power supply circuit |
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| Publication Number | Publication Date |
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| CN206226307U true CN206226307U (en) | 2017-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621303824.7U Active CN206226307U (en) | 2016-11-30 | 2016-11-30 | A kind of direct-current switch power supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911013A (en) * | 2017-12-11 | 2018-04-13 | 成都互聚科技有限公司 | A kind of regulated power supply system with multi-protective function |
-
2016
- 2016-11-30 CN CN201621303824.7U patent/CN206226307U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911013A (en) * | 2017-12-11 | 2018-04-13 | 成都互聚科技有限公司 | A kind of regulated power supply system with multi-protective function |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210826 Address after: 518000 No.3 Factory, Qiaotou Fuqiao Industrial Zone, Fuyong Town, Bao'an District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN EVERWIN PRECISION TECHNOLOGY Co.,Ltd. Address before: 518000 2nd floor, building 25, Zhiheng Industrial Park, nantouguankou 2nd Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BELLSING ACOUSTIC TECHNOLOGY Co.,Ltd. |