CN111489877B - Electromagnetic coil driving circuit - Google Patents
Electromagnetic coil driving circuit Download PDFInfo
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- CN111489877B CN111489877B CN202010376466.7A CN202010376466A CN111489877B CN 111489877 B CN111489877 B CN 111489877B CN 202010376466 A CN202010376466 A CN 202010376466A CN 111489877 B CN111489877 B CN 111489877B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F2007/1888—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings using pulse width modulation
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
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- Magnetic Treatment Devices (AREA)
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Abstract
The invention relates to the technical field of driving circuits, in particular to an electromagnetic coil driving circuit. The method comprises the following steps: the control driving circuit comprises a control chip and a driving part; the driving part is electrically connected with the control chip; when the control chip is powered on, the control chip outputs a wide pulse signal and a narrow pulse signal to the driving part; the driving part controls the output current according to the wide pulse signal and the narrow pulse signal. In the prior art, the power consumption of the electromagnetic coil is large, so that combustion damage occurs. Compared with the prior art, the invention meets the excitation requirement of the electromagnetic coil on one hand and effectively reduces the current for maintaining the starting state of the electromagnetic coil on the other hand through the wide pulse signal and the narrow pulse signal, thereby effectively reducing the power consumption of the electromagnetic coil and further effectively preventing the electromagnetic coil from being burnt due to overheating.
Description
Technical Field
The invention relates to the technical field of driving circuits, in particular to an electromagnetic coil driving circuit
Background
With the continuous development of the technology, the electromagnetic coil is widely applied to the devices in various industries, and in order to effectively utilize the physical characteristics of the electromagnetic coil, a corresponding driving circuit needs to be provided for the electromagnetic coil. However, in the actual use process, the stability of the operation of the electromagnetic coil is easily affected by the use time due to the influence of the driving circuit and the characteristics of the electromagnetic coil, and the electromagnetic coil is easily damaged by burning along with the increase of the use time, so that it is necessary to design a driving circuit capable of supporting the stable operation of the electromagnetic coil.
Disclosure of Invention
The invention provides a solenoid coil driving circuit aiming at the technical problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
a solenoid drive circuit comprises a control drive circuit, wherein the control drive circuit comprises a control chip and a drive part; the driving part is electrically connected with the control chip; when the control chip is powered on, the control chip outputs a wide pulse signal and a narrow pulse signal to the driving part; the driving part controls the output current according to the wide pulse signal and the narrow pulse signal.
When the control chip is electrified, the control chip outputs a wide pulse signal and a narrow pulse signal to the driving part. When the driving part receives the wide pulse signal, the current output by the driving part is in a high level, and the excitation process of the electromagnetic coil is completed, so that the electromagnetic coil is started. When the driving part receives the narrow pulse signal, the current output by the driving part is in a low level, so that the requirement of maintaining the starting state of the electromagnetic coil is met. Therefore, through the change of the pulse signal, on one hand, the requirement for starting the electromagnetic coil is met, on the other hand, the current for maintaining the starting state of the electromagnetic coil is effectively reduced, so that the power consumption of the electromagnetic coil during operation is effectively reduced, the electromagnetic coil is effectively prevented from being burnt due to overheating, and the stability of the operation of the electromagnetic coil is effectively enhanced.
Further, the output current comprises a high opening current and a low holding current; the driving part controls high opening current according to the wide pulse signal; the driving part controls the low holding current according to the narrow pulse signal.
Further, the control driving circuit further comprises a pulse width adjusting resistor R2 and a pulse width adjusting resistor R6, the control chip controls the width of the wide pulse signal according to the resistance value of the pulse width adjusting resistor R2 and the resistance value of the pulse width adjusting resistor R6 to adjust the high opening current, which is:
wherein, R2 is the resistance of the pulse width adjusting resistor R2, and R6 is the resistance of the pulse width adjusting resistor R6.
Further, the control chip controls the width of the narrow pulse signal according to the resistance value of the pulse width adjusting resistor R6 to adjust the low holding current, where the low holding current is:
furthermore, the control driving circuit also comprises a frequency adjusting resistor, the frequency adjusting resistor is electrically connected with the control chip, and the control chip controls the frequency of the wide pulse signal and the frequency of the narrow pulse signal according to the resistance value of the frequency adjusting resistor;
the frequency is:
wherein, R5 is the resistance of the frequency adjusting resistor.
Furthermore, the control drive circuit also comprises a wide pulse time adjusting capacitor, the wide pulse time adjusting capacitor is electrically connected with the control chip, and the control chip controls the time of the wide pulse signal according to the capacitance of the wide pulse time adjusting capacitor; the time of the wide pulse signal is:
where C2 is the capacitance of the wide pulse time adjustment capacitor.
Furthermore, the driving part comprises a driving MOS tube and a freewheeling diode; the grid and the source of the driving MOS tube are electrically connected with the control chip, and the drain of the driving MOS tube is electrically connected with the anode of the fly-wheel diode; the negative pole of the freewheeling diode is provided with a positive output end, and the positive pole of the freewheeling diode is provided with a negative output end; the driving MOS tube and the fly-wheel diode control the output current between the positive output end and the negative output end according to the wide pulse signal and the narrow pulse signal.
Further, the device also comprises an input rectifying filter circuit and a power supply circuit; the power supply circuit receives the filtering voltage input by the rectifying and filtering circuit; the power supply circuit outputs power supply voltage to the control drive circuit according to the filtering voltage.
Further, the rectification filter circuit is electrically connected with a power supply; the rectification filter circuit receives a power supply voltage; the rectification power supply circuit outputs the filter circuit to the power supply circuit.
Compared with the prior art, the invention has the following advantages:
when the control chip is electrified, the control chip outputs a wide pulse signal and a narrow pulse signal, the requirement for exciting the electromagnetic coil is met through the wide pulse signal, the requirement for maintaining the starting state of the electromagnetic coil is met through the narrow pulse signal on the one hand, and on the other hand, the current of the electromagnetic coil during operation is effectively reduced, so that the power consumption of the electromagnetic coil is effectively reduced, the electromagnetic coil is effectively prevented from being burnt due to overheating, and the stability of the operation of the electromagnetic coil is effectively enhanced.
The control drive circuit is provided with a plurality of different adjusting electronic devices, so that corresponding parameters of the wide pulse signal and the narrow pulse signal are adjusted, and the electromagnetic coil control circuit can adapt to various different electromagnetic coils by replacing the corresponding electronic devices.
Drawings
FIG. 1: the driving circuit is controlled.
FIG. 2 is a schematic diagram: and inputting the input into a rectifying and filtering circuit.
FIG. 3: a power supply circuit.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
An electromagnetic coil driving circuit comprises a control driving circuit, an input rectifying and filtering circuit and a power supply circuit. The input rectifying and filtering circuit comprises 4 diodes, a voltage dependent resistor and a filtering capacitor C1. The cathode of the diode D7 is electrically connected to the cathode of the diode D8, the anode of the diode D7 is electrically connected to the cathode of the diode D6, the cathode of the diode D5 is electrically connected to the anode of the diode D8, and the anode of the diode D5 is electrically connected to the anode of the diode D6. The positive pole of the diode D7 is further connected with a first power input end VIN1, the positive pole of the diode D8 is further connected with a second power input end VIN2, and a voltage dependent resistor M1 is arranged between the two power input ends. Thus, the input rectifying and smoothing circuit receives the power supply voltage through the first power input terminal VIN1 and the second power input terminal VIN 2. The received power supply voltage is filtered through a filter capacitor C1, and the filtered voltage is output to the power supply circuit.
The power supply circuit comprises a chip BP9918, a resistor R3, a resistor R7, a voltage stabilizing diode D2 and a capacitor C3. One end of the resistor R3 is electrically connected with the cathode of the diode D7, the cathode of the diode D8 and the anode of the filter capacitor C1, and the other end of the resistor R3 is electrically connected with the pin 1 of the chip BP 9918. One end of the resistor R7 is electrically connected with the 2 pin of the chip BP9918, and the other end of the resistor R7 is electrically connected with one pole of the capacitor C3 and the anode of the voltage stabilizing diode D2. The cathode of the voltage-stabilizing diode D2 and the other electrode of the capacitor C3 are electrically connected with the 3 pins of the chip BP 9918. Meanwhile, the cathode of the zener diode D2 and the other electrode of the capacitor C3 are electrically connected to the 4-pin of the control chip DRV110 of the control drive circuit, and one end of the resistor R3 away from the chip BP9918 is electrically connected to the cathode of the freewheeling diode D3 of the drive section of the control drive circuit. Therefore, the power supply circuit receives the filtering voltage input by the input rectifying and filtering circuit, converts the received filtering voltage into the power supply voltage and outputs the power supply voltage to the control drive circuit.
The control drive circuit includes a control chip DRV110 and a drive section. The driving part comprises a driving MOS tube, a freewheeling diode D3, a voltage stabilizing diode D1 and a resistor R1. One end of the resistor R1 is electrically connected with the pin 7 of the control chip DRV110, and the other end of the resistor R1 is electrically connected with the cathode of the zener diode D1 and the gate of the driving MOS transistor. The drain of the driving MOS tube is electrically connected with the anode of the freewheeling diode D3, and the source of the driving MOS tube is electrically connected with the 6-pin of the control chip DRV 110. The negative electrode of the freewheeling diode D3 is provided with a positive output terminal, and the positive electrode of the freewheeling diode D3 is provided with a negative output terminal. The control drive circuit is electrically connected with the electromagnetic coil through the positive output end and the negative output end. When the control chip DRV110 receives the supply voltage of the power supply circuit, the control chip DRV110 outputs a wide pulse signal and a narrow pulse signal through 7 pins. The driving MOS tube is switched on or switched off according to the wide pulse signal and the narrow pulse signal, and the freewheeling diode D3 outputs freewheeling current according to the wide pulse signal and the narrow pulse signal. The output current is controlled by matching the driving MOS tube with the freewheeling diode D3, when the control chip DRV110 outputs a wide pulse signal, the output current is high opening current, and the level of the output current is high level, so that the excitation process of the electromagnetic coil is completed, and the electromagnetic coil is started. When the control chip DRV110 outputs the narrow pulse signal, the output current is a low holding current, and the level of the output current appears as a low level, thereby maintaining the activated state of the solenoid coil. Therefore, on one hand, the requirement for starting the electromagnetic coil can be effectively met, on the other hand, the current in the starting state of the electromagnetic coil can be effectively reduced, so that the power consumption of the electromagnetic coil in the starting state is effectively reduced, the electromagnetic coil is effectively prevented from being burnt due to overheating, and the stability of the electromagnetic coil in long-time operation is effectively improved.
The control drive circuit further comprises a wide pulse width adjusting resistor R2, a wide pulse width adjusting resistor R6, a resistor R4 and a capacitor C4. The wide pulse width adjusting resistor R2 is electrically connected to pin 2 of the control chip DRV 110. One end of the wide pulse width adjusting resistor R6 is electrically connected to pin 6 of the control chip DRV110 through a resistor R4,
one end of the wide pulse width adjusting resistor R6 electrically connected with the resistor R4 is electrically connected with the source electrode of the driving MOS tube, and the other end of the wide pulse width adjusting resistor R6 is electrically connected with the 5 pin of the control chip DRV 110. The capacitor C4 is connected in parallel with the wide pulse width adjusting resistor R6. The control chip DRV110 controls the width of the wide pulse signal according to the resistance values of the two wide pulse width adjusting resistors, and further adjusts the high opening current, which is:
wherein, R2 is the resistance of the wide pulse width adjusting resistor R2, and R6 is the resistance of the wide pulse width adjusting resistor R6.
The control chip DRV110 controls the width of the narrow pulse signal according to the pulse width adjusting resistor R6 to adjust the low holding current, which is:
the control circuit further comprises a wide pulse time adjusting capacitor C2, the wide pulse time adjusting capacitor C2 is electrically connected with pin 1 of the control chip DRV110, the control chip DRV110 controls the time of the wide pulse signal according to the capacitance of the wide pulse time adjusting capacitor C2, and the time of the wide pulse signal is as follows:
wherein, C2 is the capacitance of the wide pulse time adjusting capacitor C2.
The control driving circuit further comprises a frequency adjusting resistor R5, the frequency adjusting resistor R5 is electrically connected with the 3 pins of the control chip DRV110, and the control chip DRV110 controls the frequency of the wide pulse signal and the frequency of the narrow pulse signal according to the frequency adjusting resistor R5. The frequency of the wide pulse signal and the frequency of the narrow pulse signal are as follows:
wherein, R5 is the resistance value of the frequency adjusting resistor R5.
Meanwhile, the output current is converted into feedback voltage through the wide pulse width adjusting resistor R6, and the wide pulse width adjusting resistor R6 feeds the feedback voltage back to the 6 pins of the control chip DRV110 after filtering through the resistor R4 and the capacitor C4, so that the control precision of the control chip DRV110 is improved.
In summary, the control driving circuit adjusts the corresponding parameters of the wide pulse signal and the narrow pulse signal through a plurality of different electrical elements, so that the electromagnetic coil control circuit can adapt to different electromagnetic coils, and further widens the application range of the electromagnetic coil control circuit.
The wide pulse signal and the narrow pulse signal described herein only mean that one of the pulse signals is a wide pulse signal with respect to the other pulse signal or that one of the pulse signals is a narrow pulse signal with respect to the other pulse signal. The wide and narrow expressions described herein are relative relationships of two pulse signals, and do not express properties of the pulse signals themselves.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the spirit of the invention.
Claims (3)
1. An electromagnetic coil drive circuit characterized by: the method comprises the following steps: the control driving circuit comprises a control chip and a driving part;
the driving part is electrically connected with the control chip;
when the control chip is electrified, the control chip outputs a wide pulse signal and a narrow pulse signal to the driving part;
the driving part controls output current according to the wide pulse signal and the narrow pulse signal;
the control driving circuit also comprises a pulse width adjusting resistor R6, a pulse width adjusting resistor R2, a resistor R4 and a capacitor C4;
one end of the pulse width adjusting resistor R6 is electrically connected to the control chip through the resistor R4, one end of the pulse width adjusting resistor R6 electrically connected to the resistor R4 is electrically connected to the driving part, the other end of the pulse width adjusting resistor R6 is electrically connected to the control chip, and the pulse width adjusting resistor R6 is connected in parallel to the capacitor C4;
the pulse width adjusting resistor R2 is electrically connected with the control chip;
the control chip can control the width of the wide pulse signal according to the resistance value of the pulse width adjusting resistor R2 and the resistance value of the pulse width adjusting resistor R6;
the control chip can control the width of the narrow pulse signal according to the resistance value of the pulse width adjusting resistor R6;
the control chip is capable of receiving feedback voltage fed back by the pulse width adjusting resistor R6;
the output current comprises a high opening current and a low holding current;
the driving part controls the high opening current according to the wide pulse signal;
the driving part controls the low holding current according to the narrow pulse signal;
the control chip can adjust the high opening current according to the resistance value of the pulse width adjusting resistor R2 and the resistance value of the pulse width adjusting resistor R6, and the high opening current is as follows:
wherein, R2 is the resistance value of the pulse width adjusting resistor R2, and R6 is the resistance value of the pulse width adjusting resistor R6;
the control chip can adjust the low holding current according to the resistance value of the pulse width adjusting resistor R6, and the low holding current is as follows:
；
the control driving circuit further comprises a frequency adjusting resistor, the frequency adjusting resistor is electrically connected with the control chip, and the control chip controls the frequency of the wide pulse signal and the frequency of the narrow pulse signal according to the resistance value of the frequency adjusting resistor;
the frequency is:
wherein R5 is the resistance of the frequency adjusting resistor;
the control driving circuit further comprises a wide pulse time adjusting capacitor, the wide pulse time adjusting capacitor is electrically connected with the control chip, and the control chip controls the time of the wide pulse signal according to the capacitance of the wide pulse time adjusting capacitor;
the time of the wide pulse signal is as follows:
wherein C2 is the capacitance of the wide pulse time adjusting capacitor;
the power supply circuit also comprises an input rectifying filter circuit and a power supply circuit;
the power supply circuit receives the filtering voltage input by the rectifying and filtering circuit;
the power supply circuit outputs power supply voltage to the control drive circuit according to the filtering voltage;
the power supply circuit comprises a chip BP9918, a resistor R3, a resistor R7, a zener diode D2 and a capacitor C3, wherein one end of the resistor R3 is electrically connected with the cathode of a diode D7, the cathode of a diode D8 and the anode of a filter capacitor C1 of the rectifying and filtering circuit, the other end of the resistor R3 is electrically connected with a pin 1 of the chip BP9918, one end of a resistor R7 is electrically connected with a pin 2 of the chip BP9918, the other end of the resistor R7 is electrically connected with the anode of a capacitor C3 and the cathode of the zener diode D2, the cathode of the zener diode D2 and the other end of the capacitor C3 are electrically connected with a pin 3 of the chip BP9918, meanwhile, the cathode of the zener diode D2 and the other end of the capacitor C3 are electrically connected with a pin 4 of a control chip of the control driving circuit, and one end, far away from the chip R3, far away from the chip BP9918, is electrically connected with the cathode of a freewheeling diode D3 of the driving part in the control driving circuit.
2. The electromagnetic coil drive circuit according to claim 1, wherein: the driving part comprises a driving MOS tube and a freewheeling diode;
the grid electrode and the source electrode of the driving MOS tube are electrically connected with the control chip, and the drain electrode of the driving MOS tube is electrically connected with the anode of the freewheeling diode;
the negative electrode of the fly-wheel diode is provided with a positive output end, and the positive electrode of the fly-wheel diode is provided with a negative output end;
the driving MOS tube and the freewheeling diode control the output current between the positive output end and the negative output end according to the wide pulse signal and the narrow pulse signal.
3. The electromagnetic coil drive circuit according to claim 1, characterized in that: the rectification filter circuit is electrically connected with a power supply;
the rectification filter circuit receives a power supply voltage;
the rectification filter circuit outputs the filter voltage to the power supply circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010376466.7A CN111489877B (en) | 2020-05-07 | 2020-05-07 | Electromagnetic coil driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010376466.7A CN111489877B (en) | 2020-05-07 | 2020-05-07 | Electromagnetic coil driving circuit |
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| CN111489877A CN111489877A (en) | 2020-08-04 |
| CN111489877B true CN111489877B (en) | 2022-08-26 |
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| CN201528322U (en) * | 2009-09-25 | 2010-07-14 | 安徽华东光电技术研究所 | Full solid wide pulse floating-deck modulator |
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| CN203859679U (en) * | 2014-03-21 | 2014-10-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Single-coil permanent-magnet mechanism driving circuit |
| CN105470046A (en) * | 2015-12-31 | 2016-04-06 | 广州金升阳科技有限公司 | Coil driving circuit of contactor and control method of coil driving current |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101770844B (en) * | 2009-01-06 | 2012-01-11 | 安泰汽车电气***（昆山）有限公司 | Electromagnetic coil driving circuit |
| CN101737551B (en) * | 2010-02-02 | 2011-08-17 | 中国航天科技集团公司烽火机械厂 | High-speed electromagnetic valve driver circuit |
| US9528625B2 (en) * | 2013-02-26 | 2016-12-27 | Infineon Technologies Ag | Current driving system for a solenoid |
| CN110911229A (en) * | 2019-11-26 | 2020-03-24 | 天索（苏州）控制技术有限公司 | Inductive coil driving circuit with protection function |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201528322U (en) * | 2009-09-25 | 2010-07-14 | 安徽华东光电技术研究所 | Full solid wide pulse floating-deck modulator |
| CN103200738A (en) * | 2013-03-29 | 2013-07-10 | 深圳市明微电子股份有限公司 | Constant current drive controller and light-emitting diode (LED) constant current drive circuit |
| CN203859679U (en) * | 2014-03-21 | 2014-10-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Single-coil permanent-magnet mechanism driving circuit |
| CN105470046A (en) * | 2015-12-31 | 2016-04-06 | 广州金升阳科技有限公司 | Coil driving circuit of contactor and control method of coil driving current |
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