CN205945681U - Electronic switching circuit of low -cost low -power consumption - Google Patents
Electronic switching circuit of low -cost low -power consumption Download PDFInfo
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- CN205945681U CN205945681U CN201620911328.3U CN201620911328U CN205945681U CN 205945681 U CN205945681 U CN 205945681U CN 201620911328 U CN201620911328 U CN 201620911328U CN 205945681 U CN205945681 U CN 205945681U
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- hall element
- power supply
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Abstract
The utility model relates to an electronic switching circuit of low -cost low -power consumption for detect the hall sensor who opens off state in the control circuit breaker, electronic switching circuit includes: the power sub circuit: including a full wave bridge rectifier, signal battery detects the sub circuit: including partial pressure detecting element and LC filtering unit for whether the generating line that detects inlet wire end place exists voltage, and carry out LC filtering to the power sub circuit, step -down steady voltage sub circuit: the 12V constant voltage power supply power supply is used for producing, hall sensor controls the sub circuit: be used for controlling the position that hall sensor detected the killer switch, MCU: be used for acquireing partial pressure detecting element's busbar voltage signal and hall sensor's position sigual to produce the switch that hall sensor control signal passes through the sub - circuit control hall sensor of hall sensor control. Compared with the prior art, the utility model has the advantages of ultra -low power consumption, accurate, low -cost, the simple structure of detection.
Description
Technical field
This utility model is related to a kind of electronic switching circuit, especially relates to a kind of electronic cutting of low cost low-power consumption powered-down
Road.
Background technology
Because the external chopper of electric energy meter proposes the demand of full-automatic autoreclose breaker, realizing this product
During, Ge great producer is all to complete reclosing function using Switching Power Supply, direct current generator, and microswitch or sensor are carried out
The position of the switch is detected.
If using sensor, because the stand-by power consumption ratio of itself is larger, typically all mA rank, such Switching Power Supply is treated
Machine power consumption can exceed AC0.2mA, be unsatisfactory for product standard and require.
Existing control circuit requires to meet standard, controls microswitch to carry out killer switch using driving chip
Action, the detection ratio that typically all add of pull-up resistor of microswitch is larger simultaneously, has very big power consumption, and microswitch appearance
The reason such as easily get rusty can affect the life and reliability of product.
Utility model content
The purpose of this utility model be exactly provide to overcome the defect that above-mentioned prior art exists a kind of super low-power consumption,
Detection is accurate, low cost, the electronic switching circuit of the simple low cost low-power consumption of structure.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of electronic switching circuit of low cost low-power consumption, in order to control the hall sensing of detection switch state in chopper
Device, electronic switching circuit includes：
Power supply electronic circuit：Including a full-wave rectification bridge, bus is connected to by end of incoming cables, and supplies for electronic switching circuit
Electricity；
Power supply signal detects electronic circuit：It is connected with power supply electronic circuit, including partial pressure detector unit and LC filter unit, in order to
The bus that detection end of incoming cables is located whether there is voltage, and carries out LC filtering to power supply electronic circuit；
Lowering and stabilizing blood pressure electronic circuit：It is connected with power supply signal detection electronic circuit, power in order to produce 12V regulated power supply；
Hall element controls electronic circuit：It is connected with lowering and stabilizing blood pressure electronic circuit, in order to control Hall element detection open circuit
The position of device switch；
MCU：Control electronic circuit and suddenly with power supply signal detection electronic circuit, lowering and stabilizing blood pressure electronic circuit, Hall element respectively
You connect sensor, in order to obtain the bus voltage signal of partial pressure detector unit and the position signalling of Hall element, and produce
Hall element control signal controls electronic circuit to control the switch of Hall element by Hall element.
Described partial pressure detector unit include the tenth electric capacity, the 11st electric capacity and the second resistance being sequentially connected in series, the 5th
Resistance, the 7th resistance, the tenth resistance and the 12nd resistance, described second resistance is connected with full-wave rectification bridge one outfan, institute
The 12nd resistance one end ground connection stated, the tenth described electric capacity one end is connected between the 7th resistance and the tenth resistance, the other end
Ground connection, the 11st described electric capacity one end is connected between the tenth resistance and the 12nd resistance, and the other end is grounded, described MCU
Bus voltage signal pin be connected between the tenth resistance and the 12nd resistance.
Described lowering and stabilizing blood pressure electronic circuit is including the switching power source chip being sequentially connected, transformator and linear manostat,
Described switching power source chip is connected with LC filter unit, and the outfan of described linear manostat is connected with MCU, described change
Depressor outfan controls electronic circuit to be connected with Hall element.
Described Hall element controls electronic circuit to include audion and MOSFET pipe, the described colelctor electrode of audion with
Transformator outfan connects, and emitter stage is connected with Hall element, and base stage passes through the drain electrode of the first current-limiting resistance and MOSFET pipe
Connect, the described grid of MOSFET pipe is connected with the Hall element control signal pin of MCU, source ground.
The position signalling of described Hall element includes open position signal, closing position signal and free position letter
Number.
Compared with prior art, this utility model has advantages below：
First, super low-power consumption：In monitoring, only MCU is in discontinuous operation state to this utility model, only needs timing detection letter
Number, once motion, then wake up other elements and carry out action, after other elements action, return to idle state, therefore, it is possible to make whole machine
Below power line standby input power consumption AC0.2mA, below control signal wire power consumption AC1mA.
2nd, detect accurately：This utility model replaces original microswitch that the position of the switch is carried out using Hall element
Detection, it is therefore prevented that microswitch gets rusty easily and the detection bringing of wearing and tearing is inaccurate, can adapt to compare relatively rugged environment.
3rd, low cost, structure are simple：This utility model adopts audion and the Hall element of MOSFET pipe composition to control
Electronic circuit instead of original driving chip, saves cost, more reduces power consumption simultaneously, and structure is simple, and operation is steady
Fixed.
Brief description
Fig. 1 is the circuit diagram that power supply electronic circuit and power supply signal detect electronic circuit.
Fig. 2 is the circuit diagram of lowering and stabilizing blood pressure electronic circuit.
Fig. 3 is the circuit structure diagram of MCU.
Fig. 4 controls the circuit structure diagram of electronic circuit for Hall element.
Fig. 5 detects the circuit structure diagram of the position of killer switch for Hall element, and wherein, figure (5a) is to control open circuit
Device switch is in the circuit structure diagram of closing position, and figure (5b) is the circuit structure controlling killer switch to be in open position
Figure, figure (5c) is the circuit structure diagram controlling killer switch to be in free position.
Specific embodiment
With specific embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
Embodiment：
A kind of electronic switching circuit of low cost low-power consumption, in order to control the hall sensing of detection switch state in chopper
Device, electronic switching circuit includes：
As illustrated in fig. 1 and 2, power supply electronic circuit：Including a full-wave rectification bridge, bus is connected to by end of incoming cables, and is
Electronic switching circuit is powered；
Power supply signal detects electronic circuit：It is connected with power supply electronic circuit, including partial pressure detector unit and LC filter unit, in order to
The bus that detection end of incoming cables is located whether there is voltage, and carries out LC filtering to power supply electronic circuit, as shown in figure 1, partial pressure inspection
Survey unit and include the tenth electric capacity R10, the 11st electric capacity R11 and second resistance R2 being sequentially connected in series, the 5th resistance R5, the 7th electricity
Resistance R7, the tenth resistance R10 and the 12nd resistance R12, second resistance R2 is connected with full-wave rectification bridge one outfan, the 12nd resistance
R12 one end is grounded, and the tenth electric capacity R10 one end is connected between the 7th resistance R7 and the tenth resistance R10, and the other end is grounded, and the tenth
One electric capacity R11 one end is connected between the tenth resistance R10 and the 12nd resistance R12, and the other end is grounded, the busbar voltage letter of MCU
Number pin is connected between the tenth resistance R10 and the 12nd resistance R12；
Lowering and stabilizing blood pressure electronic circuit：It is connected with power supply signal detection electronic circuit, power in order to produce 12V regulated power supply, blood pressure lowering
Voltage stabilizing electronic circuit is including the switching power source chip U2 being sequentially connected, transformator T1 and linear manostat U1, switching power source chip
U2 is connected with LC filter unit, and the outfan of linear manostat U1 is connected with MCU, transformator T1 outfan and Hall element control
System circuit connects, and switching power source chip U2 adopts UCC28910 chip；
As shown in Figures 4 and 5, Hall element controls electronic circuit：It is connected with lowering and stabilizing blood pressure electronic circuit, in order to control Hall to pass
Sensor detects the position of killer switch, including open position signal, closing position signal and free position signal.Hall sensing
Device controls electronic circuit to include audion VT1 and MOSFET pipe VT2, and the colelctor electrode of audion VT1 is connected with transformator T1 outfan,
Emitter stage is connected with Hall element, and base stage is connected with the drain electrode of MOSFET pipe VT2 by the first current-limiting resistance R101, MOSFET
The grid of pipe VT2 is connected with the Hall element control signal pin of MCU, source ground；
As shown in figure 3, MCU：Control with power supply signal detection electronic circuit, lowering and stabilizing blood pressure electronic circuit, Hall element respectively
Electronic circuit and Hall element connect, in order to obtain the bus voltage signal of partial pressure detector unit and the position letter of Hall element
Number, and producing the switch that Hall element control signal controls electronic circuit control Hall element by Hall element, MCU adopts
With MSP430FR572X type single-chip microcomputer.
This utility model passes through the break-make of electronic switching circuit controlling switch power supply 12V output, and 12V output can be for linear
Manostat and Hall element are operated because Hall element stand-by power consumption than larger it is possible to new by this practicality
Type is capable of the control of Hall element power supply it is ensured that under holding state, realizing the zero-power of Hall element.
Specific implementation is that PNP triode VT1 is opened as the control of MCU as switching tube, N-channel MOS FET pipe VT2
Close,
Resistance R104 ensures under ideal case, PNP triode VT1 reliable turn-off, and current-limiting resistance R101 limits the drain electrode of VT2
Electric current, R102, R103 ensure that VT2 reliably switchs；
When MCU judges to need killer switch action, MCU produces Hall element control signal and is sent to VT2's
Grid, the grid of VT2 obtains high level, and VT2 turns on, and VT1 is also switched on simultaneously, Hall element power on, inspection of starting working
Survey the position signalling of killer switch and return to MCU,
When MCU judges not needing killer switch action, MCU produces Hall element control signal and is sent to VT2
Grid, the grid of VT2 applies low level, and VT2 turns off, and VT1 is also switched off simultaneously, and Hall element quits work, such control
System can make the power consumption of whole control circuit unrelated with sensor, realize super-low standby power consumption switching power loss and be possibly realized.
Therefore this utility model employs Hall element and instead of original microswitch, and devising one kind can pass through
External circuit completes the control circuit of Hall element power supply, when realizing needing sensor signal, opens sensor electricity by MCU
After the completion of source, automatic closing or separating brake, cut off probe power, reduce power consumption so that using sensor, and realize high-precision
Degree, the detection of high reliability position is possibly realized, and cost is relatively cheap simultaneously.
Claims (5)
1. a kind of electronic switching circuit of low cost low-power consumption, in order to control the hall sensing of detection switch state in chopper
Device is it is characterised in that electronic switching circuit includes：
Power supply electronic circuit：Including a full-wave rectification bridge, bus is connected to by end of incoming cables, and powers for electronic switching circuit；
Power supply signal detects electronic circuit：It is connected with power supply electronic circuit, including partial pressure detector unit and LC filter unit, in order to detect
The bus that end of incoming cables is located whether there is voltage, and carries out LC filtering to power supply electronic circuit；
Lowering and stabilizing blood pressure electronic circuit：It is connected with power supply signal detection electronic circuit, power in order to produce 12V regulated power supply；
Hall element controls electronic circuit：It is connected with lowering and stabilizing blood pressure electronic circuit, in order to control Hall element detection chopper to open
The position closed；
MCU：Electronic circuit and Hall is controlled to pass with power supply signal detection electronic circuit, lowering and stabilizing blood pressure electronic circuit, Hall element respectively
Sensor connects, and in order to obtain the bus voltage signal of partial pressure detector unit and the position signalling of Hall element, and produces Hall
Sensor control signal controls electronic circuit to control the switch of Hall element by Hall element.
2. a kind of electronic switching circuit of low cost low-power consumption according to claim 1 is it is characterised in that described partial pressure
Detector unit includes the tenth electric capacity (R10), the 11st electric capacity (R11) and the second resistance (R2) being sequentially connected in series, the 5th resistance
(R5), the 7th resistance (R7), the tenth resistance (R10) and the 12nd resistance (R12), described second resistance (R2) and all wave rectification
Bridge one outfan connects, described 12nd resistance (R12) one end ground connection, and the tenth described electric capacity (R10) one end is connected to the
Between seven resistance (R7) and the tenth resistance (R10), the other end is grounded, and the 11st described electric capacity (R11) one end is connected to the tenth
Between resistance (R10) and the 12nd resistance (R12), the other end is grounded, and the bus voltage signal pin of described MCU is connected to the
Between ten resistance (R10) and the 12nd resistance (R12).
3. a kind of electronic switching circuit of low cost low-power consumption according to claim 1 is it is characterised in that described blood pressure lowering
Voltage stabilizing electronic circuit is including the switching power source chip (U2) being sequentially connected, transformator (T1) and linear manostat (U1), described
Switching power source chip (U2) is connected with LC filter unit, and the outfan of described linear manostat (U1) is connected with MCU, described
Transformator (T1) outfan controls electronic circuit to be connected with Hall element.
4. a kind of electronic switching circuit of low cost low-power consumption according to claim 3 is it is characterised in that described Hall
Sensor controls electronic circuit to include audion (VT1) and MOSFET pipe (VT2), the described colelctor electrode of audion (VT1) and change
Depressor (T1) outfan connects, and emitter stage is connected with Hall element, and base stage passes through the first current-limiting resistance (R101) and MOSFET
The drain electrode of pipe (VT2) connects, and the grid of described MOSFET pipe (VT2) is connected with the Hall element control signal pin of MCU,
Source ground.
5. a kind of electronic switching circuit of low cost low-power consumption according to claim 1 is it is characterised in that described Hall
The position signalling of sensor includes open position signal, closing position signal and free position signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620911328.3U CN205945681U (en) | 2016-08-19 | 2016-08-19 | Electronic switching circuit of low -cost low -power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620911328.3U CN205945681U (en) | 2016-08-19 | 2016-08-19 | Electronic switching circuit of low -cost low -power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205945681U true CN205945681U (en) | 2017-02-08 |
Family
ID=57948256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620911328.3U Active CN205945681U (en) | 2016-08-19 | 2016-08-19 | Electronic switching circuit of low -cost low -power consumption |
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| Country | Link |
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| CN (1) | CN205945681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370482A (en) * | 2017-06-06 | 2017-11-21 | 深圳达人高科电子有限公司 | One kind clicks button low-voltage control circuit module |
-
2016
- 2016-08-19 CN CN201620911328.3U patent/CN205945681U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370482A (en) * | 2017-06-06 | 2017-11-21 | 深圳达人高科电子有限公司 | One kind clicks button low-voltage control circuit module |
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