CN205751740U - A kind of protection circuit of multi-channel DC electric magnet - Google Patents
A kind of protection circuit of multi-channel DC electric magnet Download PDFInfo
- Publication number
- CN205751740U CN205751740U CN201620403449.7U CN201620403449U CN205751740U CN 205751740 U CN205751740 U CN 205751740U CN 201620403449 U CN201620403449 U CN 201620403449U CN 205751740 U CN205751740 U CN 205751740U
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Abstract
The utility model discloses the protection circuit of a kind of multi-channel DC electric magnet; including: microcontroller; connect total power-off protecting circuit and at least 1 road solenoid driver circuit; control conducting and the disconnection of described total power-off protecting circuit; send PWM drive signal to described solenoid driver circuit, receive the voltage signal that described solenoid driver circuit sends；Total power-off protecting circuit, connects all of solenoid driver circuit, provides running voltage to all of solenoid driver circuit；And solenoid driver circuit, receive the PWM drive signal from microcontroller, send voltage signal to microcontroller.This utility model protects multi-channel electromagnet simultaneously, it is to avoid the accident of property loss and casualties occur.
Description
Technical field
This utility model relates to solenoid circuit field, the protection circuit of a kind of multi-channel DC electric magnet.
Background technology
DC electromagnet simple in construction, uses a switch element can realize a dynamic formula and controls, therefore in household electrical appliances and work
Industry equipment is used widely.Owing to during electric magnet energising work, heating is obvious, once switch element damages and causes closing
Cut-off electricity, it is possible to cause the overheated consequence burnt of electric magnet, possibly even causes fire time serious.
Single channel electric magnet failure detector circuit is simply cumulative cannot manage multiple electric magnet effectively concentratedly.Existing
Technology not for such issues that effective solution is proposed.In the occasion that electric magnet is more, still rely on independent product
Each electric magnet therein is managed by product respectively, or controls the break-make of multiple electric magnet simply, lacks enough faults
Diagnosis and protective measure.
Utility model content
The purpose of this utility model is to provide the protection circuit of a kind of multi-channel DC electric magnet, protects multi-channel electromagnetic simultaneously
Ferrum, it is to avoid the accident of property loss and casualties occurs.
The technical solution of the utility model is the protection circuit of a kind of multi-channel DC electric magnet, including:
Microcontroller, connects total power-off protecting circuit and at least 1 road solenoid driver circuit, controls described total power-off protection
The conducting of circuit and disconnection, send PWM drive signal to described solenoid driver circuit, receive described solenoid driver circuit and send out
The voltage signal sent；
Total power-off protecting circuit, connects all of solenoid driver circuit, provides work to all of solenoid driver circuit
Make voltage；And
Solenoid driver circuit, receives the PWM drive signal from microcontroller, sends voltage signal to microcontroller；
Wherein, described solenoid driver circuit includes:
PWM drive circuit, connects microcontroller and total power-off protecting circuit, receives the PWM from microcontroller and drives letter
Number；And
Signal conditioning circuit, connects described microcontroller and PWM drive circuit, gathers the voltage letter in PWM drive circuit
Number, after conditioning, it is sent in microcontroller；
Wherein, described PWM drive circuit includes:
Electric magnet EM1, connects total power-off protecting circuit and the drain electrode of switching tube Q1；
Sustained diode 1, in parallel with described electric magnet EM1, anode connects total power-off protecting circuit, and negative electrode connects signal
Modulate circuit；
Switching tube Q1, source ground, drain electrode connects the outfan of electric magnet EM1, and grid connects the outfan of resistance R1；
Resistance R1, connects described microcontroller and the grid of switching tube Q1；And
Resistance R2, the grid of connecting valve pipe Q1 and source electrode.
Further, described microcontroller includes:
Nucleus module, connects intervalometer, analog-digital converter and General Purpose I/O pins respectively, by General Purpose I/O pins to total power-off
Protection circuit sends switch controlling signal；
Intervalometer, is simultaneously connected with at least one PWM pin of microcontroller；And
Analog-digital converter, connects at least one ADC pin of microcontroller；
In described microcontroller, described PWM pin is identical with the quantity of ADC pin.
Further, intervalometer includes comparing output logical block and Synchronization Control logical block, described compare output and patrols
Collecting unit and connect at least one PWM pin of microcontroller, each PWM pin connects a PWM drive circuit；Analog-digital converter
Including synchronizing controlled logical block and Acquisition Circuit, described Synchronization Control logical block controls to synchronize controlled logical block, described
Acquisition Circuit connects at least one ADC pin of microcontroller, and each ADC pin connects a signal conditioning circuit.
Further, signal conditioning circuit includes:
Zener diode DZ1, connects outfan and the ground of current-limiting resistance R7；
Current-limiting resistance R7, the common port between drain electrode and the electric magnet EM of input connecting valve pipe Q1, this common port is
Voltage sample point；
Resistance R8, connects outfan and the ADC pin of microcontroller of current-limiting resistance R7；
Resistance R9 connects input and the ground of resistance R7.
Further, total power-off protecting circuit includes:
Switching tube Q2, drain electrode connects the input of electric magnet EM1, and source electrode connects 24V power supply, and grid connects the defeated of resistance R4
Go out end；
Resistance R3, the source electrode of connecting valve pipe Q2 and grid；
Resistance R4, the drain electrode of input connecting valve pipe Q3；
Switching tube Q3, source ground, grid connects the outfan of resistance R5；
Resistance R5, input connects microcontroller；
Resistance R6, the source electrode of connecting valve pipe Q3 and grid.
Further, switching tube Q1 is N-channel field effect transistor；Switching tube Q2 is P-channel field-effect transistor (PEFT) pipe；Switching tube Q3 is N
Channel field-effect pipe.
Beneficial effect: this utility model protects multi-channel electromagnet simultaneously, it is to avoid the thing of property loss and casualties occurs
Therefore.
Accompanying drawing explanation
Fig. 1 is the protection circuit figure of multi-channel DC electric magnet.
Fig. 2 is the cut-away view of microcontroller.
Labelling in figure: 1-microcontroller；The total power-off protecting circuit of 2-；3-solenoid driver circuit；4-signal conditioning circuit；
5-PWM drive circuit；6-nucleus module；7-intervalometer；8-analog-digital converter.
Detailed description of the invention
Below in conjunction with the accompanying drawings, preferably embodiment of the present utility model is described in further detail:
In conjunction with Fig. 1, the protection circuit of a kind of multi-channel DC electric magnet, including:
Microcontroller 1, connects total power-off protecting circuit 2 and 1 solenoid driver circuit 3, controls described total power-off protection electricity
The conducting on road 2 and disconnection, send PWM drive signal to described solenoid driver circuit 3, receives described solenoid driver circuit 3
The voltage signal sent；
Total power-off protecting circuit 2, connects all of solenoid driver circuit 3, provides to all of solenoid driver circuit 3
Running voltage；And
Solenoid driver circuit 3, receives the PWM drive signal from microcontroller 1, sends voltage letter to microcontroller 1
Number；
Wherein, described solenoid driver circuit 3 includes:
PWM drive circuit 5, connects microcontroller 1 and total power-off protecting circuit 2, receives the PWM from microcontroller 1 and drives
Dynamic signal；And
Signal conditioning circuit 4, connects described microcontroller 1 and PWM drive circuit 5, gathers the electricity in PWM drive circuit 5
Pressure signal, after conditioning, is sent in microcontroller；
Wherein, described PWM drive circuit 5 includes:
Electric magnet EM1, connects total power-off protecting circuit 2 and the drain electrode of switching tube Q1；
Sustained diode 1, in parallel with described electric magnet EM1, anode connects total power-off protecting circuit 2, and negative electrode connects signal
Modulate circuit 4；
Switching tube Q1, source ground, drain electrode connects the outfan of electric magnet EM1, and grid connects the outfan of resistance R1；
Resistance R1, connects described microcontroller 1 and the grid of switching tube Q1；And
Resistance R2, the grid of connecting valve pipe Q1 and source electrode.
Described signal conditioning circuit 4 includes:
Zener diode DZ1, connects outfan and the ground of current-limiting resistance R7；
Current-limiting resistance R7, the common port between drain electrode and the electric magnet EM of input connecting valve pipe Q1, this common port is
Voltage sample point；
Resistance R8, connects outfan and the ADC pin of microcontroller 1 of current-limiting resistance R7；
Resistance R9 connects input and the ground of resistance R7.
Described total power-off protecting circuit 2 includes:
Switching tube Q2, drain electrode connects the input of electric magnet EM1, and source electrode connects 24V power supply, and grid connects the defeated of resistance R4
Go out end；
Resistance R3, the source electrode of connecting valve pipe Q2 and grid；
Resistance R4, the drain electrode of input connecting valve pipe Q3；
Switching tube Q3, source ground, grid connects the outfan of resistance R5；
Resistance R5, input connects microcontroller 1；
Resistance R6, the source electrode of connecting valve pipe Q3 and grid.
Preferably, switching tube Q1 is N-channel field effect transistor；Switching tube Q2 is P-channel field-effect transistor (PEFT) pipe；Switching tube Q3 is N ditch
Road field effect transistor.
Described microcontroller 1 has a General Purpose I/O pins, 1 ADC pin and 1 PWM pin.General Purpose I/O pins connects
Total power-off protecting circuit 2.ADC pin connects the R1 in resistance R8, the PWM pin PWM drive circuit 5 in signal conditioning circuit 4.
Preferably, described microcontroller 1 is simultaneously connected with 3 solenoid driver circuits 3, and described microcontroller 1 is by 3
ADC pin connects the resistance R8 in 3 signal conditioning circuits 4 respectively, connects 3 PWM respectively by 3 PWM pins and drives electricity
R1 in road 5.
Preferably, described microcontroller 1 is simultaneously connected with 4 solenoid driver circuits 3, and described microcontroller 1 is by 4
ADC pin connects the resistance R8 in 4 signal conditioning circuits 4 respectively, connects 4 PWM respectively by 4 PWM pins and drives electricity
R1 in road 5.
Preferably, described microcontroller 1 is simultaneously connected with 5 solenoid driver circuits 3, and described microcontroller 1 is by 5
ADC pin connects the resistance R8 in 5 signal conditioning circuits 4 respectively, connects 5 PWM respectively by 5 PWM pins and drives electricity
R1 in road 5.
Preferably, described microcontroller 1 is simultaneously connected with 6 solenoid driver circuits 3, and described microcontroller 1 is by 6
ADC pin connects the resistance R8 in 6 signal conditioning circuits 4 respectively, connects 6 PWM respectively by 6 PWM pins and drives electricity
R1 in road 5.
In conjunction with Fig. 1 and Fig. 2, described microcontroller 1 includes:
Nucleus module 6, connects intervalometer 7, analog-digital converter 8 and General Purpose I/O pins, respectively by General Purpose I/O pins to always
Power-off protecting circuit 2 sends switch controlling signal；
Intervalometer 7, connects 1 PWM pin of microcontroller 1；And
Analog-digital converter 8, connects 1 ADC pin of microcontroller 1.
Preferably, intervalometer 7 connects 2 PWM pins by comparing output logical block, and analog-digital converter 8 is by integrated
Circuit connects 2 ADC pins.
Preferably, intervalometer 7 connects 3 PWM pins by comparing output logical block, and analog-digital converter 8 is by integrated
Circuit connects 3 ADC pins.
Preferably, intervalometer 7 connects 4 PWM pins by comparing output logical block, and analog-digital converter 8 is by integrated
Circuit connects 4 ADC pins.
Preferably, intervalometer 7 connects 5 PWM pins by comparing output logical block, and analog-digital converter 8 is by integrated
Circuit connects 5 ADC pins.
Preferably, intervalometer 7 connects 6 PWM pins by comparing output logical block, and analog-digital converter 8 is by integrated
Circuit connects 6 ADC pins.
In conjunction with Fig. 2, described intervalometer 7 includes comparing output logical block and Synchronization Control logical block, and described comparison is defeated
Going out logical block and connect a PWM pin of microcontroller 1, this PWM pin connects a PWM drive circuit 5；Analog-digital converter
8 include synchronizing controlled logical block and Acquisition Circuit, and described Synchronization Control logical block controls to synchronize controlled logical block, described
Acquisition Circuit connects an ADC pin of microcontroller 1, and this ADC pin connects a signal conditioning circuit 4.
Preferably, comparing output logical block and connect 2 PWM pins of microcontroller 1, each PWM pin connects one
PWM drive circuit 5；Acquisition Circuit connects 2 ADC pins of microcontroller 1, and each ADC pin connects a signal condition electricity
Road 4.
Preferably, comparing output logical block and connect 3 PWM pins of microcontroller 1, each PWM pin connects one
PWM drive circuit 5；Acquisition Circuit connects 3 ADC pins of microcontroller 1, and each ADC pin connects a signal condition electricity
Road 4.
Preferably, comparing output logical block and connect 4 PWM pins of microcontroller 1, each PWM pin connects one
PWM drive circuit 5；Acquisition Circuit connects 4 ADC pins of microcontroller 1, and each ADC pin connects a signal condition electricity
Road 4.
Preferably, comparing output logical block and connect 5 PWM pins of microcontroller 1, each PWM pin connects one
PWM drive circuit 5；Acquisition Circuit connects 5 ADC pins of microcontroller 1, and each ADC pin connects a signal condition electricity
Road 4.
Preferably, comparing output logical block and connect 6 PWM pins of microcontroller 1, each PWM pin connects one
PWM drive circuit 5；Acquisition Circuit connects 6 ADC pins of microcontroller 1, and each ADC pin connects a signal condition electricity
Road 4.
PWM drive signal is sent to the switch of the PWM drive circuit 5 of correspondence by microcontroller 1 by each PWM pin
In pipe Q1, each PWM drive circuit 5 normally works, and the supply voltage of electric magnet EM1 is 24V, and each modulate circuit is from opening
Close the common port between drain electrode and the electric magnet EM1 of pipe Q1 and gather voltage, when voltage is higher than 3.1V, microcontroller 1 receives
To voltage signal be 3.1V, when sampled point voltage less than 3.1V time, the voltage signal received in microcontroller 1 for reality
Voltage.
10 sampled voltages of Acquisition Circuit continuous detecting, detect the most in order in each PWM drive circuit 5 and sample
The voltage of point, often the sampled voltage in one PWM drive circuit 5 of detection, is spaced 50 milliseconds, the more next PWM of detection drives electricity
Sampled voltage in road 5, after continuous 10 detections terminate, unites respectively by the testing result in each PWM drive circuit 5
Meter, obtains out of order number of times, and the number of times that any road PWM drive circuit 5 breaks down, more than 7 times, is considered as this PWM and drives electricity
Road 5 occurs in that fault really.It is detected as a cycle continuous 10 times.
During the PWM pin output low level of microcontroller 1, the voltage that one of them ADC pin collects is a detection
More than 7 times less than 0.3V in cycle, then corresponding PWM drive circuit 5 occurs in that fault, corresponding electric magnet EM1 are opened a way, always
Power-off protecting circuit 2 breaker in middle pipe Q3 is turned off with switching tube Q2, and the electric magnet EM1 in all PWM drive circuit 5 loses energy
Amount, all PWM drive circuit 5 enter guard mode.That detects the results are shown in Table 1 every time.
| Times of collection | Voltage (V) |
| 1st time | 0.12 |
| 2nd time | 0.14 |
| 3rd time | 0.16 |
| The 4th | 0.18 |
| The 5th | 0.2 |
| 6th time | 0.22 |
| 7th time | 0.24 |
| 8th time | 0.26 |
| 9th time | 0.28 |
| 10th time | 0.3 |
Table 1: within a cycle, the magnitude of voltage that an ADC pin collects.
During the PWM pin output low level of microcontroller 1, the voltage that one of them ADC pin collects is an inspection
In the survey cycle more than 7 times between 0.7V～1.5V, then corresponding PWM drive circuit 5 occurs in that fault, corresponding field effect
Should pipe Q1 short circuit, total power-off protecting circuit 2 breaker in middle pipe Q3 is turned off with switching tube Q2, the electromagnetism in all PWM drive circuit 5
Ferrum EM1 loses energy, and all PWM drive circuit 5 enter guard mode.That detects the results are shown in Table 2 every time.
| Times of collection | Voltage (V) |
| 1st time | 0.7 |
| 2nd time | 0.8 |
| 3rd time | 0.9 |
| The 4th | 1 |
| The 5th | 1.1 |
| 6th time | 1.2 |
| 7th time | 1.3 |
| 8th time | 1.4 |
| 9th time | 1.5 |
| 10th time | 1.6 |
Table 2: within a cycle, the magnitude of voltage that an ADC pin collects.
Microcontroller 1 PWM pin output high level time, one of them ADC pin within a detection cycle more than 7 times
The voltage signal collected in 7 seconds of solenoid driver circuit 3 conducting is more than 2.9V, then corresponding PWM drive circuit 5 goes out
Having showed fault, now corresponding switching tube Q1 open circuit, total power-off protecting circuit 2 breaker in middle pipe Q3 is turned off with switching tube Q2, institute
Having the electric magnet EM1 in PWM drive circuit 5 to lose energy, all PWM drive circuit 5 enter guard mode.The knot of detection every time
Fruit is shown in Table 3.
| Times of collection | Voltage (V) |
| 1st time | 3 |
| 2nd time | 3.1 |
| 3rd time | 3.2 |
| The 4th | 3.3 |
| The 5th | 3.2 |
| 6th time | 3.5 |
| 7th time | 3.6 |
| 8th time | 3.3 |
| 9th time | 3.8 |
| 10th time | 3.9 |
Table 3: within a cycle, the magnitude of voltage that an ADC pin collects.
Within a detection cycle, the number of times that any road PWM drive circuit 5 breaks down is no more than 7 times, is considered as
All of PWM drive circuit 5 does not all have fault, and the nucleus module 6 in microcontroller 1 passes through General Purpose I/O pins to total power-off protection
After circuit 2 sends the switch controlling signal of Guan Bi, the equal constant conduction of switching tube Q2 and Q3, electric magnet EM1 is up to duty.
The technical solution of the utility model protects multi-channel electromagnet simultaneously, it is to avoid the thing of property loss and casualties occur
Therefore.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to
Assert that of the present utility model being embodied as is confined to these explanations.Ordinary skill for this utility model art
For personnel, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should regard
For belonging to protection domain of the present utility model.
Claims (6)
1. the protection circuit of a multi-channel DC electric magnet, it is characterised in that including:
Microcontroller, connects total power-off protecting circuit and at least 1 road solenoid driver circuit, controls described total power-off protecting circuit
Conducting and disconnection, to described solenoid driver circuit send PWM drive signal, receive described solenoid driver circuit send
Voltage signal；
Total power-off protecting circuit, connects all of solenoid driver circuit, to all of solenoid driver circuit offer work electricity
Pressure；And
Solenoid driver circuit, receives the PWM drive signal from microcontroller, sends voltage signal to microcontroller；
Wherein, described solenoid driver circuit includes:
PWM drive circuit, connects microcontroller and total power-off protecting circuit, receives the PWM drive signal from microcontroller；With
And
Signal conditioning circuit, connects described microcontroller and PWM drive circuit, gathers the voltage signal in PWM drive circuit, logical
After crossing conditioning, it is sent in microcontroller；
Wherein, described PWM drive circuit includes:
Electric magnet EM1, connects total power-off protecting circuit and the drain electrode of switching tube Q1；
Sustained diode 1, in parallel with described electric magnet EM1, anode connects total power-off protecting circuit, and negative electrode connects signal condition
Circuit；
Switching tube Q1, source ground, drain electrode connects the outfan of electric magnet EM1, and grid connects the outfan of resistance R1；
Resistance R1, connects described microcontroller and the grid of switching tube Q1；And
Resistance R2, the grid of connecting valve pipe Q1 and source electrode.
The protection circuit of multi-channel DC electric magnet the most according to claim 1, it is characterised in that described microcontroller bag
Include:
Nucleus module, connects intervalometer, analog-digital converter and General Purpose I/O pins respectively, by General Purpose I/O pins to total power-off protection
Circuit sends switch controlling signal；
Intervalometer, is simultaneously connected with at least one PWM pin of microcontroller；And
Analog-digital converter, connects at least one ADC pin of microcontroller；
In described microcontroller, described PWM pin is identical with the quantity of ADC pin.
The protection circuit of multi-channel DC electric magnet the most according to claim 2, it is characterised in that: intervalometer includes comparing
Output logical block and Synchronization Control logical block, the described output logical block that compares connects at least one PWM of microcontroller
Pin, each PWM pin connects a PWM drive circuit；Analog-digital converter includes synchronizing controlled logical block and Acquisition Circuit,
Described Synchronization Control logical block controls to synchronize controlled logical block, and described Acquisition Circuit connects at least one of microcontroller
ADC pin, each ADC pin connects a signal conditioning circuit.
The protection circuit of multi-channel DC electric magnet the most according to claim 3, it is characterised in that signal conditioning circuit bag
Include:
Zener diode DZ1, connects outfan and the ground of current-limiting resistance R7；
Current-limiting resistance R7, the common port between drain electrode and the electric magnet EM of input connecting valve pipe Q1, this common port is voltage
Sampled point；
Resistance R8, connects outfan and the ADC pin of microcontroller of current-limiting resistance R7；
Resistance R9 connects input and the ground of resistance R7.
The protection circuit of multi-channel DC electric magnet the most according to claim 4, it is characterised in that total power-off protecting circuit
Including:
Switching tube Q2, drain electrode connects the input of electric magnet EM1, and source electrode connects 24V power supply, and grid connects the output of resistance R4
End；
Resistance R3, the source electrode of connecting valve pipe Q2 and grid；
Resistance R4, the drain electrode of input connecting valve pipe Q3；
Switching tube Q3, source ground, grid connects the outfan of resistance R5；
Resistance R5, input connects microcontroller；
Resistance R6, the source electrode of connecting valve pipe Q3 and grid.
The protection circuit of multi-channel DC electric magnet the most according to claim 5, it is characterised in that: switching tube Q1 is N ditch
Road field effect transistor；Switching tube Q2 is P-channel field-effect transistor (PEFT) pipe；Switching tube Q3 is N-channel field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620403449.7U CN205751740U (en) | 2016-05-06 | 2016-05-06 | A kind of protection circuit of multi-channel DC electric magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620403449.7U CN205751740U (en) | 2016-05-06 | 2016-05-06 | A kind of protection circuit of multi-channel DC electric magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205751740U true CN205751740U (en) | 2016-11-30 |
Family
ID=57371049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620403449.7U Withdrawn - After Issue CN205751740U (en) | 2016-05-06 | 2016-05-06 | A kind of protection circuit of multi-channel DC electric magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205751740U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761877A (en) * | 2016-05-06 | 2016-07-13 | 深圳市君航智远科技有限公司 | Protection circuit and control method of multi-channel direct-current electromagnet |
| CN113030673A (en) * | 2021-02-24 | 2021-06-25 | 中科新松有限公司 | Electromagnet control circuit and detection method thereof |
-
2016
- 2016-05-06 CN CN201620403449.7U patent/CN205751740U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761877A (en) * | 2016-05-06 | 2016-07-13 | 深圳市君航智远科技有限公司 | Protection circuit and control method of multi-channel direct-current electromagnet |
| CN105761877B (en) * | 2016-05-06 | 2018-04-24 | 深圳市君航智远科技有限公司 | The protection circuit and control method of a kind of multi-channel DC electromagnet |
| CN113030673A (en) * | 2021-02-24 | 2021-06-25 | 中科新松有限公司 | Electromagnet control circuit and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161130 Effective date of abandoning: 20180424 |