CN108879615A - A kind of current foldback circuit - Google Patents
A kind of current foldback circuit Download PDFInfo
- Publication number
- CN108879615A CN108879615A CN201810754585.4A CN201810754585A CN108879615A CN 108879615 A CN108879615 A CN 108879615A CN 201810754585 A CN201810754585 A CN 201810754585A CN 108879615 A CN108879615 A CN 108879615A
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- CN
- China
- Prior art keywords
- cpu
- inverter
- rectifier
- voltage
- display screen
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
Abstract
The invention discloses a kind of current foldback circuits; including switch unit; the switch unit includes display unit, transformation resistance and connection bus; the display unit includes display screen and temperature sensor, and the switch unit input terminal is equipped with rectifier, and the rectifier input is equipped with exchange stabilized power supply; the switch unit output end is equipped with inverter; the inverter output end is equipped with load, and the display screen output end is equipped with CPU, and the CPU output end is equipped with control PCB.The present invention, which passes through, is equipped with control PCB; be conducive to switch over to by route; when passing through voltage≤threshold voltage; it controls PCB control CPU and rectifier and inverter is connected by connection bus, to reduce electric energy loss, when passing through voltage > threshold voltage; it controls PCB control CPU and rectifier and inverter is connected by transformation resistance; when excessive by voltage, control PCB controls the connection between CPU eliminating rectifier and inverter, to protect to load.
Description
Technical field
The present invention relates to field of circuit technology, in particular to a kind of current foldback circuit.
Background technique
Circuit protection is mainly to protect the component in electronic circuit by feelings such as over-voltage, overcurrent, surge, electromagnetic interferences
Not damaged under condition, with the development of science and technology, electric power/electronic product increasingly diversification, complication, applied circuit are protected
Oneself non-simple glass tube fuse in the past of protection element usually protects device to have varistor, TVS, gas-discharge tube etc.,
It crosses in current circuit, when overcurrent passes through conducting wire, huge burden can be generated to conducting wire, when acting on using on electric appliance, electricity
Flow will cause the situation that electric appliance burns or damages, and may seriously threaten to what safety of people.
In circuit protection, when by electric current it is small with aid using electric appliance both ends voltage when, do not need to circuit into
How row protection, also need to protect circuit, then will increase electric current by the loss in route, use damage to increase
Consumption is more than that degree is not high to crossing current circuit to carry out the electric current that protection usually requires to switch over route, but how to pass through,
If being cut off to route, then user can be caused using obstacle.
Therefore, it is necessary to solve the above problems to invent a kind of current foldback circuit.
Summary of the invention
The purpose of the present invention is to provide a kind of current foldback circuits, when passing through voltage≤threshold voltage, control PCB control
CPU processed connects rectifier and inverter by connection bus, thus reduce electric energy loss, when passing through voltage > threshold voltage,
It controls PCB control CPU and rectifier and inverter is connected by transformation resistance, when excessive by voltage, control PCB controls CPU
Connection between eliminating rectifier and inverter, to be protected to load, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the present invention provides the following technical solutions：A kind of current foldback circuit, including switch unit,
The switch unit includes display unit, transformation resistance and connection bus, and the display unit includes display screen and temperature sensing
Device, the switch unit input terminal are equipped with rectifier, and the rectifier input is equipped with exchange stabilized power supply, the switch unit
Output end is equipped with inverter, and the inverter output end is equipped with load, and the display screen output end is equipped with CPU, the CPU output
End is equipped with control PCB, specifically：
The connection bus is used to connect one section of access between rectifier and inverter；
The rectifier, which facilitates, is changed into DC power supply for the AC power source for exchanging stabilized power supply；
The display screen includes adjustment unit, and the display screen shows the voltage generated by CPU, facilitates observation
By voltage whether more than the specified setting of CPU threshold voltage, the adjustment unit changes the resistance value of transformation resistance, and temperature passes
Sensor facilitates using control PCB for detecting transformation resistance by temperature inversion caused by electric current to the source electricity by CPU
Pressure is switched over by route.
Preferably, the exchange stabilized power supply and rectifier are electrically connected, and the switch unit and inverter are electrically connected,
The inverter and load are electrically connected.
Preferably, the transformation resistance, display screen and temperature sensor are electrically connected with CPU, the CPU and control
PCB is electrically connected.
Preferably, the connection bus and CPU are electrically connected, and the transformation resistance is corresponding with temperature sensor.
Technical effect and advantage of the invention：
1, the present invention by be equipped with control PCB, be conducive to switch over to by route, when pass through voltage≤threshold voltage
When, control PCB control CPU connects rectifier and inverter by connection bus, to reduce electric energy loss, when passing through voltage >
When threshold voltage, control PCB control CPU connects rectifier and inverter by transformation resistance, when excessive by voltage, control
PCB controls the connection between CPU eliminating rectifier and inverter, to protect to load, reach makes electric current completely
With；
2, the present invention is conducive to reduce by electric current, by adjusting unit to transformation resistance by being equipped with transformation resistance
Resistance value is converted, and transformation resistance is facilitated to be applicable in most circuit, but electric current by the transformation resistance time it is long when, transformation resistance
The temperature on surface can continue to increase, to generate larger burden to circuit, need to control PCB and circuit is switched over or cut off,
And it connects bus and reduces the obstruction received of voltage in circuit, rectifier output voltage energy Gu is transmitted directly in inverter
It is converted, avoids the resistance in circuit that transmission electric current is lost, reduce energy consumption.
Detailed description of the invention
Fig. 1 is integrated circuit structural schematic diagram of the invention；
Fig. 2 is switch unit system structure diagram of the invention；
Fig. 3 is display screen structure schematic diagram of the invention；
In figure：It is 1 switch unit, 2 display units, 3 transformation resistances, 4 connection buses, 5 display screens, 6 temperature sensors, 7 whole
Flow device, 8 exchange stabilized power supplies, 9 inverters, 10 loads, 11CPU, 12 control PCB.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1：
The present invention provides a kind of current foldback circuit as shown in Figs. 1-3, including switch unit 1, the switch unit 1
Including display unit 2, transformation resistance 3 and connection bus 4, the display unit 2 includes display screen 5 and temperature sensor 6, described
1 input terminal of switch unit is equipped with rectifier 7, and 7 input terminal of rectifier is equipped with exchange stabilized power supply 8, and the switch unit 1 is defeated
Outlet is equipped with inverter 9, and 9 output end of inverter is equipped with load 10, and 5 output end of display screen is equipped with CPU11, described
CPU11 output end is equipped with control PCB12, specifically：
The connection bus 4 is used to connect one section of access between rectifier 7 and inverter 9；
The rectifier 7, which facilitates, is changed into DC power supply for the AC power source for exchanging stabilized power supply 8；
The display screen 5 includes adjustment unit, and the display screen 5 shows the voltage generated by CPU11, convenient
Observe the voltage that passes through whether more than the specified setting of CPU11 threshold voltage, the adjustment unit changes the resistance of transformation resistance 3
Value, temperature sensor 6 facilitate using control PCB12 for detecting transformation resistance 3 by temperature inversion caused by electric current to logical
Cross switching over by route for the source voltage of CPU11.
The effect of the embodiment technical solution is：When passing through voltage≤threshold voltage, control PCB12 control CPU11 is logical
It crosses connection bus 4 and connects rectifier 7 and inverter 9, thus reduce electric energy loss, when passing through voltage > threshold voltage, control
PCB12 controls CPU11 and connects rectifier 7 and inverter 9 by transformation resistance 3, and temperature sensor 6 detects the temperature of transformation resistance 3
Degree variation, when temperature is excessively high or by voltage it is excessive when, control PCB12 control CPU11 eliminating rectifier 7 and inverter 9 between
Connection, to be protected to load.
Embodiment 2：
The exchange stabilized power supply 8 is electrically connected with rectifier 7, and the alternating current that exchange stabilized power supply 8 generates is through over commutation
Device 7 becomes direct current after converting, convenient to provide direct current energy for electronic equipment, and the switch unit 1 electrically connects with inverter 9
It connects, the inverter 9 is electrically connected with load 10, and direct current is converted to alternating current required for load 10 by inverter 9, convenient
Electric energy is provided for load 10.
The transformation resistance 3, display screen 5 and temperature sensor 6 are electrically connected with CPU11, and CPU11 is facilitated to pass through display
The connection voltage for shielding 5 pairs of circuits detects, and overtension is avoided to generate damage, the CPU11 and control PCB12 electricity to circuit
Property connection, PCB12 by the voltage of CPU11 to switching over for control, reduction circuit loss.
The connection bus 4 and CPU11, which is electrically connected, to be sent out, and voltage is facilitated directly to pass through connection bus 4, reduces voltage in electricity
The obstruction received in road reduces energy consumption, and the transformation resistance 3 is corresponding with temperature sensor 6, and temperature sensor 6 is examined
Survey transformation resistance 3 temperature change, when temperature is excessively high or by voltage it is excessive when, control PCB12 control CPU11 eliminating rectifier
Connection between 7 and inverter 9, to protect to load, the model of the temperature sensor 6 is set as GMD50.
Working principle of the present invention：
Referring to Figure of description 2 and attached drawing 3, when electric current passes through CPU11, voltage that display screen 5 will be generated by CPU11
It has been shown that, the voltage for facilitating observation to pass through whether more than the specified setting of CPU11 threshold voltage, when passing through voltage≤threshold value electricity
When pressure, control PCB12 control CPU11 connects rectifier 7 and inverter 9 by connection bus 4, thus reduce electric energy loss, when
When by voltage > threshold voltage, control PCB12 control CPU11 connects rectifier 7 and inverter 9, temperature by transformation resistance 3
Sensor 6 detect transformation resistance 3 temperature change, when temperature is excessively high or by voltage it is excessive when, control PCB12 control CPU11
Connection between eliminating rectifier 7 and inverter 9, to be protected to load；
Referring to Figure of description 1, the alternating current that exchange stabilized power supply 8 generates becomes direct current after the conversion of rectifier 7
After the screening of switch unit 1, the inverter 9 that selected direct current is multiple parallel connections is powered, then inverter 9 will be straight
Galvanic electricity is converted to alternating current required for load 10, convenient to provide electric energy for load 10, and when load 10 damages, due to simultaneously
The mode of connection will not cause to damage to others load 10, so as to carry out protection processing to entire circuit.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (4)
1. a kind of current foldback circuit, including switch unit (1), it is characterised in that：The switch unit (1) includes display unit
(2), transformation resistance (3) and connection bus (4), the display unit (2) include display screen (5) and temperature sensor (6), described
Switch unit (1) input terminal is equipped with rectifier (7), and rectifier (7) input terminal is equipped with exchange stabilized power supply (8), described to cut
Unit (1) output end is changed equipped with inverter (9), inverter (9) output end is equipped with load (10), and the display screen (5) is defeated
Outlet is equipped with CPU (11), and CPU (11) output end is equipped with control PCB (12), specifically：
Connection bus (4) is used to connect one section of access between rectifier (7) and inverter (9)；
The rectifier (7), which facilitates, is changed into DC power supply for the AC power source for exchanging stabilized power supply (8)；
The display screen (5) includes adjustment unit, and the display screen (5) shows the voltage generated by CPU (13), side
Just observe the voltage that passes through whether more than CPU (13) specified setting threshold voltage, the adjustment unit changes transformation resistance (3)
Resistance value, temperature sensor (6) facilitates for detecting transformation resistance (3) by temperature inversion caused by electric current and utilizes control
PCB (12) is switched over to the source voltage by CPU (13) by route.
2. a kind of current foldback circuit according to claim 1, it is characterised in that：The exchange stabilized power supply (8) with it is whole
It flows device (7) to be electrically connected, the switch unit (1) and inverter (9) are electrically connected, the inverter (9) and load (10) electricity
Property connection.
3. a kind of current foldback circuit according to claim 1, it is characterised in that：The transformation resistance (3), display screen
(5) it is electrically connected with CPU (11) with temperature sensor (6), the CPU (11) and control PCB (12) are electrically connected.
4. a kind of current foldback circuit according to claim 1, it is characterised in that：The connection bus (4) and CPU (11)
It is electrically connected, the transformation resistance (3) is corresponding with temperature sensor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754585.4A CN108879615A (en) | 2018-07-11 | 2018-07-11 | A kind of current foldback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810754585.4A CN108879615A (en) | 2018-07-11 | 2018-07-11 | A kind of current foldback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108879615A true CN108879615A (en) | 2018-11-23 |
Family
ID=64300971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810754585.4A Pending CN108879615A (en) | 2018-07-11 | 2018-07-11 | A kind of current foldback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108879615A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109808867A (en) * | 2019-02-13 | 2019-05-28 | 莆田市蚂蚁草贸易有限公司 | One kind take photo by plane unmanned plane decline deceleration device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2181996Y (en) * | 1993-07-06 | 1994-11-09 | 张成雨 | Over-voltage and over-current protection high voltage electrostatic duster |
| CN101494371A (en) * | 2008-01-25 | 2009-07-29 | Abb公司 | Load control apparatus |
| CN101515758A (en) * | 2008-02-21 | 2009-08-26 | 施耐德东芝换流器欧洲公司 | Device for protecting a speed controller against overcurrent |
| CN207053428U (en) * | 2016-10-11 | 2018-02-27 | 北京中科宇杰节电设备有限公司 | 220V threephase asynchronous private energy-saving apparatus |
-
2018
- 2018-07-11 CN CN201810754585.4A patent/CN108879615A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2181996Y (en) * | 1993-07-06 | 1994-11-09 | 张成雨 | Over-voltage and over-current protection high voltage electrostatic duster |
| CN101494371A (en) * | 2008-01-25 | 2009-07-29 | Abb公司 | Load control apparatus |
| CN101515758A (en) * | 2008-02-21 | 2009-08-26 | 施耐德东芝换流器欧洲公司 | Device for protecting a speed controller against overcurrent |
| CN207053428U (en) * | 2016-10-11 | 2018-02-27 | 北京中科宇杰节电设备有限公司 | 220V threephase asynchronous private energy-saving apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109808867A (en) * | 2019-02-13 | 2019-05-28 | 莆田市蚂蚁草贸易有限公司 | One kind take photo by plane unmanned plane decline deceleration device |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181123 |
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| RJ01 | Rejection of invention patent application after publication |