CN209343877U - A kind of control circuit for electromagnet - Google Patents
A kind of control circuit for electromagnet Download PDFInfo
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- CN209343877U CN209343877U CN201920190430.2U CN201920190430U CN209343877U CN 209343877 U CN209343877 U CN 209343877U CN 201920190430 U CN201920190430 U CN 201920190430U CN 209343877 U CN209343877 U CN 209343877U
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Abstract
The utility model relates to a kind of control circuit for electromagnet, including DC-DC transfer circuit, delay circuit and impedance inverter circuit；The power input of the DC-DC transfer circuit is connect with external power supply, the power output end of the DC-DC transfer circuit is connect with the input terminal of delay circuit and magnet spool respectively, the output end of the delay circuit is connected with the input terminal of impedance inverter circuit, and the output end of the impedance inverter circuit and the reference voltage input terminal of DC-DC transfer circuit connect.The utility model can make electromagnet work under different operating voltages, to realize the reliable control of wide-voltage range (8V~18V) and hot environment lower electromagnet；Reducing voltage simultaneously maintains electromagnet to be maintained at working condition, so that system power dissipation is reduced, damage caused by reducing electromagnet due to fever, and and entire control circuit is simple, it is easy to make, it is at low cost.
Description
Technical field
The utility model relates to a kind of control circuit for electromagnet.
Background technique
The distance-light mapping mode of the double optical lens in automobile repacking market takes electromagnet directly to power on and power off progress at present
Distance-light transformation control, there are system power dissipation height, electromagnet to be easy due to self-heating temperature rise for existing control circuit for electromagnet
The problem of damaging, electromagnet caused to cannot proceed normally the distance-light switching of double optical lens, high failure rate.
Utility model content
In view of the above technical problems, the utility model provides a kind of control circuit for electromagnet.
The technical solution that the utility model solves above-mentioned technical problem is as follows: a kind of control circuit for electromagnet, including direct current-
DC transfer circuit, delay circuit and impedance inverter circuit；
The power input of the DC-DC transfer circuit is connect with external power supply, the DC-DC transfer circuit
Power output end connect respectively with the input terminal of delay circuit and magnet spool, the output end of the delay circuit and resistance
The input terminal of transformation circuit is connected, the output end of the impedance inverter circuit and the reference electricity of DC-DC transfer circuit
Press input terminal connection.
The beneficial effects of the utility model are: electromagnet can be made to work under different operating voltages using foregoing circuit,
To realize the reliable control of wide-voltage range (8V~18V) and hot environment lower electromagnet；Voltage is reduced simultaneously maintains electromagnet
It is maintained at working condition, so that system power dissipation is reduced, damage caused by reducing electromagnet due to fever, and entire control circuit
Simply, easy to make, it is at low cost.
Detailed description of the invention
Fig. 1 is a kind of structural block diagram of control circuit for electromagnet provided by the embodiment of the utility model；
Fig. 2 is the structural block diagram of another control circuit for electromagnet provided by the embodiment of the utility model；
Fig. 3 is a kind of circuit diagram of control circuit for electromagnet provided by the embodiment of the utility model.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Fig. 1 is a kind of structural block diagram of control circuit for electromagnet provided by the embodiment of the utility model, as shown in Figure 1, should
Circuit includes DC-DC transfer circuit, delay circuit and impedance inverter circuit；
The power input of the DC-DC transfer circuit is connect with external power supply, the DC-DC transfer circuit
Power output end connect respectively with the input terminal of delay circuit and magnet spool, the output end of the delay circuit and resistance
The input terminal of transformation circuit is connected, the output end of the impedance inverter circuit and the reference electricity of DC-DC transfer circuit
Press input terminal connection.
Specifically, electromagnet can be made to work under different operating voltages using foregoing circuit, to realize wide-voltage range
The reliable control of (8V~18V) and hot environment lower electromagnet；Reducing voltage simultaneously maintains electromagnet to be maintained at working condition, from
And system power dissipation is reduced, damage caused by reducing electromagnet due to fever, and entire control circuit is simple, it is easy to make, at
This is low.
Optionally, in this embodiment, as shown in Fig. 2, the circuit further includes reverse connection prevention protection circuit, the anti-reverse guarantor
The input terminal of protection circuit is connect with external power supply, the output end of the anti-reverse external circuits and DC-dc conversion electricity
The power input on road connects.
Specifically, reverse connection prevention protection circuit can prevent from causing component in control circuit for electromagnet because of reverse power connection
Damage.
Optionally, in this embodiment, as shown in Fig. 2, the circuit further includes filter circuit, the input of the filter circuit
End is connect with the power input of the output end of the anti-reverse external circuits and the DC-DC transfer circuit.
Specifically, partial automobile halogen lamp power supply mode is PWM (Pulse after tested to extend halogen lamp service life
Width Modulation) power supply mode, traditional magnet control mode cisco unity malfunction passes through increase in the embodiment
One filter circuit can make input pulse voltage be converted to DC voltage；It increases double optical lens and is applicable in vehicle installation percent of pass,
It is the developing direction of following double optical lens magnet controls.
Optionally, in this embodiment, as shown in Fig. 2, the circuit further includes absorbing circuit, the input of the absorbing circuit
End is connect with the power output end of the DC-DC transfer circuit.
Specifically, electromagnet is a kind of inductive load with high inductance, therefore when power-on voltage disconnects, can generate anti-
Electromotive force, interferes other electrical appliances on automobile, in the embodiment, by increase absorbing circuit can eliminate it is above-mentioned anti-electronic
The interference of gesture, to protect other electric appliances on automobile.
As shown in figure 3, the DC-DC transfer circuit 1 includes buck-boost type DC-DC conversion chip U1, inductance
L1 and L2, diode D2, capacitor C3, C4, C6, C7 and C8；The input pin of the buck-boost type DC-DC conversion chip U1
Power input as the DC-DC transfer circuit 1 is connect with one end of the inductance L1, and the inductance L1's is another
End is connect with a common end of the capacitor C3 and C4, one end of another common end of the capacitor C3 and C4 and the inductance L2
And the anode connection of the diode D2, the other end ground connection of the inductance L2, the cathode and the electricity of the diode D2
The common end for holding C6, C7 and C8 is connected to the power output end of the DC-DC transfer circuit 1, described C6, C7 and C8
Another common end grounding.
The DC-DC transfer circuit 1 further includes resistance R3 and diode D4；The cathode and power supply of the diode D4
It connects, one end and the buck-boost type DC-DC conversion chip U1 of the anode of the diode D4 and the resistance R3
Enabled pin connection, the other end ground connection of the resistance R3.
The impedance inverter circuit 3 includes resistance R1, R2 and R4, triode Q1；One end of the resistance R2 and described straight
The power output end of stream-DC transfer circuit 1 connects, and the other end of the resistance R2 is connect with one end of described resistance R1, R4
As the output end of the impedance inverter circuit 3, the other end of the resistance R1 is grounded, the other end of the resistance R4 with it is described
The collector of triode Q1 connects, and the emitter ground connection of the triode Q1, the base stage of the triode Q1 is as the impedance
The input terminal of translation circuit 3.
The delay circuit 2 includes capacitor C9, resistance R5, R6 and R7；One end of the capacitor C9 is as the delay electricity
The input terminal on road 2, the other end of the capacitor C9 are connect with one end of described resistance R5, R6, the other end of the resistance R5 with
One end of the resistance R7 is connected to the output end of the delay circuit 2, the other end ground connection of described resistance R6, R7.
The reverse connection prevention protection circuit 4 includes diode D1；The anode of the diode D1 is as the anti-reverse protection
The input terminal of circuit 4, output end of the cathode of the diode D1 as the reverse connection prevention protection circuit 4.
The filter circuit 5 includes capacitor C1, C2；A common end of described capacitor C1, C2 are connected to the filtered electrical
The input terminal on road 5, another common end grounding of described capacitor C1, C2.
The absorbing circuit 6 includes diode D3；Input of the cathode of the diode D3 as the absorbing circuit 6
End, the plus earth of the diode D3.
A kind of working principle of control circuit for electromagnet provided by the embodiment of the utility model is retouched below with reference to Fig. 3
It states.
Circuit as shown in Figure 3 is SEPIC (single ended primary inductor converter) topology knot
Structure；Wherein, using the unilateral conduction of diode, diode D1 is used for anti-reverse protection；Capacitor C1, C2 make input pulse voltage
DC voltage is converted to, and there is filter function；Chip U1, inductance L1, inductance L2, diode D2, capacitor C3, C4, C6,
The basic SEPIC of the compositions such as C7, C8 (single ended primary inductor converter) buck DC-DC becomes
Parallel operation, wherein XL6007 can be selected in chip U1, and XL6007 is switch buck-boost type DC-DC conversion chip, fixed switching frequency
400KHz, chip interior integrate the reliability modules such as overcurrent protection, overheat protector, SW overvoltage protection.The 3rd foot of XL6007 chip is
Voltage Feedback refers to foot, voltage 1.25V；The delay circuit being made of capacitor C9, resistance R6, R5 and R7, powered on moment because
The principle that the pressure drop of capacitor can not be mutated, capacitor are equally connected, and the voltage between capacitor C9 and resistance R6 is exactly the voltage of Vo point,
By resistance R5 make triode Q1 be connected, it is in parallel with R4 to be equivalent to R1, then connect with R2, by Ohm's law calculating R1, R4 and
The value of R2, it is known that powering in 80 milliseconds Vo point output voltage be 15V；After powering on, Vo charges to capacitor C9, triode Q1
Base potential, which reduces, levels off to the level of GND, and Q1 triode is in open-circuit condition, and resistance R1 connects with R2 makes Vo point voltage
5V is at this time stable operating voltage；Diode D3 provides the circuit that electromagnet generates counter electromotive force, protection as freewheeling diode
Other electric appliances on automobile.
The distance-light mapping mode of the double optical lens in automobile repacking market takes electromagnet directly to power on and power off progress at present
Distance-light transformation control, the variation of magnet spool temperature can cause the variation of electromagnet overall performance, when coil connects electricity
After source is applied with voltage, the temperature of coil can be gradually increasing, and the resistance of coil also just increases therewith, can be dropped by the electric current of coil
It is low, since the product of the circle number of the current value and coil that pass through in coil is considered ampere-turn, the mechanical output of DC electromagnet
The size of power is directly proportional to its ampere-turn, therefore also will cause the reduction of ampere-turn, the mechanical output force of DC electromagnet
Also just become smaller.Using at 20 DEG C of environment temperature as foundation, coil temperature and coil resistance, the relationship such as following table institute between ampere-turn
Show.
| Coil temperature (DEG C) | -40 | -20 | 0 | 20 | 40 | 60 | 80 | 100 | 120 |
| Resistance coefficient | 0.764 | 0.843 | 0.921 | 1 | 1.079 | 1.157 | 1.236 | 1.314 | 1.393 |
| Ampere-turn ratio | 1.309 | 1.186 | 1.086 | 1 | 0.927 | 0.864 | 0.809 | 0.761 | 0.718 |
Assuming that headlight for vehicles operating voltage is direct current 12V, the resistance of electromagnet is 22 Ω when environment temperature is 20 DEG C；It is then double
When optical lens is switched to distance light, power P=U of electromagnet consumption2/ R=122/ 22=6.55 watts.Electricity is tested after work half an hour
About 60 DEG C of the temperature rise of magnet self-heating.Ampere-turn ratio i.e. at 20 DEG C of environment temperature, after work of electromagnet half an hour
It is the 80% of initial ampere-turn ratio.
In control circuit for electromagnet shown in Fig. 3, input direct-current voltage 12V can be boosted to 15V, keep electromagnet machinery defeated
Power output is greater than the mechanical output force of traditional control method electromagnet, keeps 15V voltage to be delayed after 80 milliseconds, input voltage is reduced
For 5V voltage, to maintain electromagnet to be maintained at working condition.Power P=U of electromagnet consumption2/ R=52/ 22=1.14 watts.It can
To see, electromagnet power consumption reduces more than 80% compared with traditional control method in the circuit, and test electromagnet self-heating temperature rise is about 8 DEG C,
Reduce electromagnet fever and caused by damage；Electromagnet power consumption is reduced, that is, reduces double optical lens product temperatures, particularly with
The bis- optical lens of LED, greatly prolong the LED lamp bead service life, improve the reliability of double optical lens.Electromagnet power consumption is reduced, that is, is reduced
Double optical lens power, are more energy-saving and environmentally friendly.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of control circuit for electromagnet, which is characterized in that converted including DC-DC transfer circuit, delay circuit and impedance
Circuit；
The power input of the DC-DC transfer circuit is connect with external power supply, the electricity of the DC-DC transfer circuit
Source output terminal is connect with the input terminal of delay circuit and magnet spool respectively, and the output end of the delay circuit and impedance become
The input terminal for changing circuit is connected, and the output end of the impedance inverter circuit and the reference voltage of DC-DC transfer circuit are defeated
Enter end connection.
2. control circuit for electromagnet according to claim 1, which is characterized in that the DC-DC transfer circuit includes
Buck-boost type DC-DC conversion chip U1, inductance L1 and L2, diode D2, capacitor C3, C4, C6, C7 and C8；
Power supply of the input pin of the buck-boost type DC-DC conversion chip U1 as the DC-DC transfer circuit
Input terminal is connect with one end of the inductance L1, and a common end of the other end of the inductance L1 and the capacitor C3 and C4 connect
It connects, another common end of the capacitor C3 and C4 is connect with the anode of one end of the inductance L2 and the diode D2, institute
The other end ground connection of inductance L2 is stated, the cathode of the diode D2 and a common end of described capacitor C6, C7 and C8 are connected to
The power output end of the DC-DC transfer circuit, another common end grounding of described C6, C7 and C8.
3. control circuit for electromagnet according to claim 1, which is characterized in that the impedance inverter circuit includes resistance
R1, R2 and R4, triode Q1；
One end of the resistance R2 is connect with the power output end of the DC-DC transfer circuit, and the resistance R2's is another
End and one end of described resistance R1, R4 are connected to the output end of the impedance inverter circuit, another termination of the resistance R1
Ground, the other end of the resistance R4 are connect with the collector of the triode Q1, the emitter ground connection of the triode Q1, described
Input terminal of the base stage of triode Q1 as the impedance inverter circuit.
4. control circuit for electromagnet according to claim 1, which is characterized in that the delay circuit includes capacitor C9, electricity
Hinder R5, R6 and R7；
Input terminal of the one end of the capacitor C9 as the delay circuit, the other end of the capacitor C9 and the resistance R5,
One end of R6 connects, and one end of the other end of the resistance R5 and the resistance R7 are connected to the output of the delay circuit
End, the other end ground connection of described resistance R6, R7.
5. control circuit for electromagnet according to claim 1, which is characterized in that it further include reverse connection prevention protection circuit, it is described
The input terminal of reverse connection prevention protection circuit is connect with external power supply, and the output end of the reverse connection prevention protection circuit and the direct current-are straight
Flow the power input connection of translation circuit.
6. control circuit for electromagnet according to claim 5, which is characterized in that the reverse connection prevention protection circuit includes two poles
Pipe D1；
Input terminal of the anode of the diode D1 as the reverse connection prevention protection circuit, the cathode of the diode D1 is as institute
State the output end of reverse connection prevention protection circuit.
7. control circuit for electromagnet according to claim 5, which is characterized in that it further include filter circuit, the filtered electrical
The power input of the output end and the DC-DC transfer circuit of the input terminal on road and the anti-reverse external circuits connects
It connects.
8. control circuit for electromagnet according to claim 7, which is characterized in that the filter circuit includes capacitor C1, C2；
A common end of described capacitor C1, C2 are connected to the input terminal of the filter circuit, another public affairs of described capacitor C1, C2
End ground connection altogether.
9. control circuit for electromagnet according to claim 1, which is characterized in that it further include absorbing circuit, the absorption electricity
The input terminal on road is connect with the power output end of the DC-DC transfer circuit.
10. control circuit for electromagnet according to claim 9, which is characterized in that the absorbing circuit includes diode D3；
Input terminal of the cathode of the diode D3 as the absorbing circuit, the plus earth of the diode D3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920190430.2U CN209343877U (en) | 2019-02-11 | 2019-02-11 | A kind of control circuit for electromagnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920190430.2U CN209343877U (en) | 2019-02-11 | 2019-02-11 | A kind of control circuit for electromagnet |
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| Publication Number | Publication Date |
|---|---|
| CN209343877U true CN209343877U (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920190430.2U Active CN209343877U (en) | 2019-02-11 | 2019-02-11 | A kind of control circuit for electromagnet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112802652A (en) * | 2021-01-15 | 2021-05-14 | 无锡声亚医疗科技有限公司 | Reliable control circuit applied to direct current electromagnet control mechanical arm |
-
2019
- 2019-02-11 CN CN201920190430.2U patent/CN209343877U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112802652A (en) * | 2021-01-15 | 2021-05-14 | 无锡声亚医疗科技有限公司 | Reliable control circuit applied to direct current electromagnet control mechanical arm |
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