CN206819829U - A kind of DC electric magnet driving apparatus - Google Patents
A kind of DC electric magnet driving apparatus Download PDFInfo
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- CN206819829U CN206819829U CN201720769520.8U CN201720769520U CN206819829U CN 206819829 U CN206819829 U CN 206819829U CN 201720769520 U CN201720769520 U CN 201720769520U CN 206819829 U CN206819829 U CN 206819829U
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- trigger
- electromagnet
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- driving apparatus
- resistance
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Abstract
It the utility model is related to a kind of DC electric magnet driving apparatus, external circuit including being connected into loop by power supply, switch, electromagnet, it is characterized in that, the external circuit is connected with drive circuit, the drive circuit includes pulse-width modulation circuit, and the pulse-width modulation circuit alternately exports high level and low level with controlling switch pipe Q1 break-make electromagnet loop alternate conduction and disconnection after outside contactor closure is powered by trigger.A kind of DC electric magnet driving apparatus of the present utility model, high level is exported by trigger and turns on switching tube electromagnet direct-on-line starting, and the pulsewidth square wave controlling switch pipe Q1 that frequency f is produced using trigger causes electromagnet half voltage to drive with frequency f speed-sensitive switches, to reduce the caloric value that electromagnet works long hours.
Description
Technical field
Electromechanical Qu Donglingyu is the utility model is related to, more particularly to a kind of DC electric magnet driving apparatus.
Background technology
Traditional solenoid driver circuit as shown in figure 1, including 12V power supplys, switch S (can also being substituted with relay) and
Electromagnet L, when electromagnet L needs to be powered, it is only necessary to which closure switch S can be to be applied to 12V power supplys on electromagnet L.But
Under this type of drive, electromagnet L carries 12V full voltages all the time, and caloric value is high, and then influences electromagnet reliability, very
Extremely electromagnet L may be caused to burn, be not suitable for working long hours.
Utility model content
The purpose of this utility model is to provide a kind of DC electric magnet driving apparatus can solve electromagnet length well
Time bears full voltage and high the problem of generating heat.
To reach above-mentioned requirements, the utility model adopts the technical scheme that：A kind of DC electric magnet driving apparatus is provided,
External circuit including being connected into loop by power supply, switch, electromagnet, external circuit are connected with drive circuit, drive circuit bag
Include pulse-width modulation circuit, pulse-width modulation circuit after outside contactor closure is powered by trigger alternately output high level and
Low level causes electromagnet loop alternate conduction and disconnection with controlling switch pipe Q1 break-makes.
Further, in pulse-width modulation circuit, resistance R2 first ends simultaneously with trigger VCC ends, trigger R ends, two poles
Be connected to switch after pipe D2 negative poles, the connection of electromagnet first end, the ends of resistance R2 second and meanwhile with resistance R3 first ends, trigger DC
End connection, the ends of resistance R3 second are grounded be connected with trigger TH ends, trigger TR ends simultaneously after by electric capacity C2, and diode D2 is just
Pole is grounded after being connected with the end of electromagnet second by switching tube Q1, switching tube Q1 base stages connection trigger Q ends.
Further, drive circuit also includes power-up time delay circuit, is touched with extending when external circuit switch closure is powered
Send out device output high level conducting switching tube Q1 time.
Yet further, in power-up time delay circuit, resistance R1 first ends are connected with pulse-width modulation circuit trigger VCC ends,
The ends of resistance R1 second are grounded after being connected with diode D1 negative poles by electric capacity C1, and diode D1 positive poles trigger with pulse-width modulation circuit
Device TH ends connect.
Compared with prior art, the utility model has advantages below：
A kind of DC electric magnet driving apparatus of the present utility model, high level is exported by trigger and turns on switching tube
Electromagnet direct-on-line starting, and made using trigger generation frequency f pulsewidth square wave controlling switch pipe Q1 with frequency f speed-sensitive switches
The driving of electromagnet half voltage is obtained, to reduce the caloric value that electromagnet works long hours.
Brief description of the drawings
Fig. 1 is existing solenoid driver circuit figure；
Fig. 2 is circuit diagram of the present utility model.
Embodiment
As shown in Fig. 2 the present embodiment provides a kind of DC electric magnet driving apparatus, including by 12V power supplys, switch S, electromagnetism
Iron L is connected into the external circuit (02) in loop, and external circuit is connected with drive circuit (01), and drive circuit includes pulsewidth modulation electricity
Road, pulse-width modulation circuit is after outside contactor closure is powered by trigger U1 output frequencies f pulsewidth square wave to control
Switching tube Q1 break-makes cause electromagnet loop with frequency f high speeds alternate conduction and disconnection.
Wherein, in pulse-width modulation circuit, resistance R2 first ends simultaneously with trigger U1 VCC ends, trigger U1 R ends,
Diode D2 negative poles, electromagnet L first ends connection after be connected to switch S, the ends of resistance R2 second simultaneously with resistance R3 first ends, touch
Device U1 DC ends connection is sent out, the ends of resistance R3 second pass through electricity be connected with trigger U1 TH ends, trigger U1 TR ends simultaneously after
Hold C2 ground connection, diode D2 positive poles are grounded after being connected with the ends of electromagnet L second by switching tube Q1, and the connection of switching tube Q1 base stages is touched
Send out device Q ends.Wherein, trigger U1 is 555 triggers.
Drive circuit also includes power-up time delay circuit, to extend trigger U1 outputs when external circuit switch S closures are powered
High level conducting switching tube Q1 time.In power-up time delay circuit, resistance R1 first ends are with pulse-width modulation circuit trigger U1's
VCC ends are connected, and the ends of resistance R1 second are grounded after being connected with diode D1 negative poles by electric capacity C1, and diode D1 positive poles are adjusted with pulsewidth
Circuit trigger TH ends connection processed.Wherein, electric capacity C1 is polar capacitor.
When switching S connections, VCC is the 8th end that 12V voltages are applied to 555 trigger U1, and 555 trigger U1 start working.
Meanwhile VCC through first resistor R1, second resistance R2,3rd resistor R3 and diode D1 to the first electric capacity C1 and the second electric capacity C2
Charging.First electric capacity C1 capacitance is larger, and the second electric capacity C2 both end voltages Uc2 will rise to 2VCC/ after long period T
3.The 3rd of 555 trigger U1 supports continuous output high level in this T time, and this high level turns on switching tube Q1, power supply VCC
Through electromagnet L, switching tube Q1 to ground, electromagnet L bears at both ends VCC voltages, and electromagnet L is direct-on-line starting, and full voltage is run
Time be T.
First electric capacity C1 both end voltages Uc1 and the second electric capacity C2 both end voltages Uc2 persistently rise.When the second electric capacity C2 both ends
When voltage Uc2 is only slight beyond 2VCC/3,555 trigger U1 bulk properties make the second electric capacity C2 start to discharge；Meanwhile 555 trigger
Device U1 the 3rd distal process is changed into low level, and this low level ends switching tube Q1.Hereafter, 555 trigger U1 and second resistance R2,
3rd resistor R3, the second electric capacity C2, the circuit of switching tube Q1 compositions enter multivibrator mode of operation, 555 trigger U1 productions
Raw frequency f pulsewidth square wave so that switching tube Q1 is with frequency f speed-sensitive switches.Because electromagnet L has inductance characteristic, its both ends
Voltage can not be mutated, and therefore, electromagnet L both end voltages are limited in VCC/2, and electromagnet is run into half voltage.
When the second electric capacity C2 starts electric discharge, due to diode D1 one-way conduction characteristic, the first electric capacity C1 cannot participate in
Electric discharge.Purpose existing for first electric capacity C1 is exactly when switching S to connect, to extend the time that Uc2 reaches 2VCC/3.
Power-up time delay circuit refers to after being powered through first resistor R1, second resistance R2,3rd resistor R3 to the first electric capacity C1
Charged, charging interval T.In T time, stable high level is produced according to 555 trigger U1 inherent characteristic and driven
Switching tube Q1 carries out the full voltage that voltage is VCC to electromagnet L and driven.After energization T time, pulsewidth modulation drive circuit according to
The pulsewidth square wave driving switch pipe Q1 that 555 trigger U1 inherent characteristic produces frequency f is VCC/2 to electromagnet L progress voltages
Half voltage driving.Electromagnet L caloric value is directly proportional to driving voltage, therefore, when electromagnet L is shorter after powered up
Between be the larger full voltage driving of caloric value in T, be all the less half voltage driving of caloric value after T time, effectively reduce
The caloric value that works long hours.
Claims (5)
1. a kind of DC electric magnet driving apparatus, including the external circuit in loop is connected into by power supply, switch, electromagnet, it is special
Sign is that the external circuit is connected with drive circuit, and the drive circuit includes pulse-width modulation circuit, the pulsewidth modulation electricity
Road alternately exports high level and low level with controlling switch pipe Q1 break-makes after outside contactor closure is powered by trigger
So that electromagnet loop alternate conduction and disconnection.
2. a kind of DC electric magnet driving apparatus according to claim 1, it is characterised in that the pulse-width modulation circuit is outside
By trigger output frequency f pulsewidth square wave with controlling switch pipe Q1 break-make electromagnet after portion's contactor closure energization
Loop is with frequency f alternate conductions and disconnection.
A kind of 3. DC electric magnet driving apparatus according to claim 2, it is characterised in that in the pulse-width modulation circuit,
Resistance R2 first ends are connected to be connected with trigger VCC ends, trigger R ends, diode D2 negative poles, electromagnet first end simultaneously after
Switch, the ends of resistance R2 second are connected with resistance R3 first ends, trigger DC ends simultaneously, the ends of resistance R3 second and meanwhile with trigger TH
It is grounded after end, the connection of trigger TR ends by electric capacity C2, diode D2 positive poles pass through switching tube after being connected with the end of electromagnet second
Q1 is grounded, switching tube Q1 base stages connection trigger Q ends.
4. a kind of DC electric magnet driving apparatus according to claim 1, it is characterised in that the drive circuit also includes upper
Electric delay circuit, to extend the time of trigger output high level conducting switching tube Q1 when external circuit switch closure is powered.
A kind of 5. DC electric magnet driving apparatus according to claim 4, it is characterised in that in the power-up time delay circuit,
Resistance R1 first ends are connected with trigger VCC ends, and the ends of resistance R1 second are grounded after being connected with diode D1 negative poles by electric capacity C1,
Diode D1 positive poles are connected with trigger TH ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720769520.8U CN206819829U (en) | 2017-06-28 | 2017-06-28 | A kind of DC electric magnet driving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720769520.8U CN206819829U (en) | 2017-06-28 | 2017-06-28 | A kind of DC electric magnet driving apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206819829U true CN206819829U (en) | 2017-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720769520.8U Active CN206819829U (en) | 2017-06-28 | 2017-06-28 | A kind of DC electric magnet driving apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN206819829U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322067A (en) * | 2018-09-25 | 2019-02-12 | 浙江大学 | A kind of presser foot lifter magnet control system of multi-mode output driving |
-
2017
- 2017-06-28 CN CN201720769520.8U patent/CN206819829U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322067A (en) * | 2018-09-25 | 2019-02-12 | 浙江大学 | A kind of presser foot lifter magnet control system of multi-mode output driving |
| CN109322067B (en) * | 2018-09-25 | 2020-02-28 | 浙江大学 | Multi-mode output driven presser foot lifting electromagnet control system |
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