CN111442130A - Electromagnetic valve driving circuit - Google Patents
Electromagnetic valve driving circuit Download PDFInfo
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- CN111442130A CN111442130A CN202010376461.4A CN202010376461A CN111442130A CN 111442130 A CN111442130 A CN 111442130A CN 202010376461 A CN202010376461 A CN 202010376461A CN 111442130 A CN111442130 A CN 111442130A
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- power supply
- voltage
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- electrically connected
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M11/00—Power conversion systems not covered by the preceding groups
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Electronic Switches (AREA)
Abstract
The invention relates to the technical field of circuit driving, in particular to a solenoid valve driving circuit. The power supply circuit comprises an input rectifying filter circuit, a power supply circuit and a control drive circuit; the input rectifying and filtering circuit is electrically connected with the power supply and outputs filtering voltage to the power supply circuit according to the power supply voltage; the power supply circuit outputs power supply voltage to the control drive circuit according to the filtering voltage; the control driving circuit is electrically connected with the power supply circuit and comprises a control chip, and when the control chip receives power supply voltage, the control chip outputs a wide pulse signal and a narrow pulse signal. In the prior art, although the electromagnetic valve can be effectively driven, the electromagnetic valve is easily burnt under the influence of the power consumption of the coil of the electromagnetic valve. Compared with the prior art, the invention meets the requirement of exciting the electromagnetic valve by outputting the wide pulse signal and meets the requirement of continuously working the electromagnetic valve by the narrow pulse signal, thereby effectively reducing the working current of the electromagnetic valve and further reducing the power consumption of the electromagnetic valve.
Description
Technical Field
The invention relates to the technical field of driving circuits, in particular to a driving circuit of an electromagnetic valve.
Background
With the continuous development of the technology, the solenoid valve is widely applied to different devices, so how to effectively drive the solenoid valve becomes very important. Although prior art can effectively drive the solenoid valve, in the solenoid valve use, receive drive circuit and solenoid valve coil self characteristic's influence, along with the increase of live time, the problem of burning damage easily appears in the solenoid valve coil. Therefore, it is necessary to design a driving circuit which can make the solenoid valve coil operate more stably.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a solenoid valve driving circuit.
In order to solve the technical problems, the invention provides the following technical scheme:
a solenoid valve driving circuit comprises an input rectification filter circuit, a power supply circuit and a control driving circuit; the input rectifying and filtering circuit is electrically connected with the power supply and outputs filtering voltage to the power supply circuit according to the power supply voltage; the power supply circuit outputs power supply voltage to the control drive circuit according to the filtering voltage; the control driving circuit is electrically connected with the power supply circuit and comprises a control chip, and when the control chip receives power supply voltage, the control chip outputs a wide pulse signal and a narrow pulse signal to control output current.
The power supply voltage firstly passes through the input rectification filter circuit, and the input rectification filter circuit rectifies and filters the power supply voltage and then inputs the filtered voltage to the power supply circuit. The power supply circuit outputs a power supply voltage value to control the driving circuit after being powered on. After the control chip of the control driving circuit is electrified, the control chip converts the input power supply voltage into a voltage pulse sequence and outputs the voltage pulse sequence to the coil of the electromagnetic valve. The voltage pulse sequence comprises a wide pulse signal and a narrow pulse signal, when the wide pulse signal is output, the output current is represented as high level, so that the excitation process of the solenoid valve coil is completed, and the solenoid valve is further opened, and when the narrow pulse signal is output, the output current is represented as low level, so that the opening state of the solenoid valve is maintained. In conclusion, the output current is changed from high level to low level through the change from the wide pulse signal to the narrow pulse signal, on one hand, the high level output current can effectively start the electromagnetic valve, and on the other hand, the low level output current can effectively reduce the power consumption of the electromagnetic valve coil while maintaining the opening of the electromagnetic valve, thereby protecting the electromagnetic valve coil from being easily burnt and damaged due to overheating, and further enhancing the operation stability of the electromagnetic valve coil.
Further, the input rectifying and filtering circuit comprises a rectifying bridge and a filtering capacitor; the power supply voltage is input to the filter capacitor through the rectifier bridge; the filter capacitor outputs a filter voltage to the power supply circuit according to the power supply voltage.
Further, the rectifier bridge is provided with a first power supply input end and a second power supply input end; the first power supply input end is electrically connected with a power supply, and the second power supply input end is electrically connected with the power supply; and a voltage dependent resistor is arranged between the first power input end and the second power input end.
Furthermore, a driving part is arranged in the control driving circuit; the driving part is electrically connected with the control chip and controls output current according to the wide pulse signal and the narrow pulse signal.
Furthermore, the driving part comprises a driving MOS tube, a freewheeling diode, a driving resistor and a voltage stabilizing diode; the source electrode of the driving MOS tube is electrically connected with the control chip, the grid electrode of the driving MOS tube is electrically connected with the control chip through a driving resistor, the grid electrode of the driving MOS tube is electrically connected with the cathode of the voltage stabilizing diode, and the drain electrode of the driving MOS tube is electrically connected with the anode of the fly-wheel diode; the anode of the fly-wheel diode is provided with a negative output end, and the cathode of the fly-wheel diode is provided with a positive output end; the driving MOS tube and the fly-wheel diode control the output current between the negative output end and the positive output end according to the wide pulse signal and the narrow pulse signal.
Furthermore, a feedback part is arranged in the control driving circuit, the feedback part is electrically connected with the control chip, the feedback part generates feedback voltage according to the output current, and the feedback part outputs the feedback voltage to the control chip.
Further, the feedback part comprises a feedback resistor and a feedback capacitor; the feedback resistor is connected with the feedback capacitor in parallel, two poles of the feedback resistor are electrically connected with the control chip through the feedback capacitor, and the feedback resistor receives output current; the feedback resistor generates a feedback voltage according to the output current, and the feedback resistor outputs the feedback voltage to the control chip.
Further, the power supply comprises a direct current power supply and an alternating current power supply.
Compared with the prior art, the invention has the following advantages:
utilize control chip output wide pulse signal, narrow pulse signal in order to control output current, can satisfy the needs of opening the solenoid valve on the one hand, on the other hand can effectively reduce the electric current that passes through the solenoid valve coil when maintaining the solenoid valve open mode to the effectual consumption that reduces the solenoid valve coil, and then effectively prevented the solenoid valve coil and burnt the damage because of overheated, effectively improved the stability of solenoid valve coil operation.
The control driving circuit is internally provided with a feedback part, the output current can be fed back to the control chip in a feedback voltage mode through the feedback part, and the control chip performs further control according to the feedback voltage, so that the control precision of the control chip is effectively improved.
The power supply can be a direct current power supply or an alternating current power supply, so that the application range of the invention is effectively widened.
Drawings
FIG. 1: the driving circuit is controlled.
FIG. 2: 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 drawings, but the present invention is not limited to these embodiments.
A solenoid valve driving circuit comprises an input rectifying filter circuit, a power supply circuit and a control driving circuit. The input rectifying and filtering circuit comprises a rectifying bridge and a filtering capacitor C1. The rectifier bridge comprises four diodes, the cathode of the diode D7 is electrically connected with the cathode of the diode D4, the anode of the diode D7 is electrically connected with the cathode of the diode D6, the cathode of the diode D5 is electrically connected with the anode of the diode D4, and the anode of the diode D5 is electrically connected with the anode of the diode D6. The rectifier bridge is further provided with a first power input end and a second power input end, the first power input end is respectively and electrically connected with the anode of the diode D7 and the cathode of the diode D6, and the second power input end is respectively and electrically connected with the anode of the diode D4 and the cathode of the diode D5. The first power input end and the second power input end are also provided with piezoresistors. The first power input end and the second power input end are electrically connected with a power supply. The anode of the filter capacitor C1 is electrically connected to the cathode of the diode D7 and the cathode of the diode D4, respectively, and the cathode of the filter capacitor C1 is electrically connected to the anode of the diode D6 and the anode of the diode D5, respectively. The rectifier bridge receives power supply voltage through the first power supply input end and the second power supply input end, the power supply voltage is input to the filter capacitor C1 through the rectifier bridge, and the filter capacitor C1 outputs the filter voltage to the power supply circuit.
The power supply may be one of a dc power supply or an ac power supply. The voltage of the DC power supply is 110-255V, the voltage of the AC power supply is 110-255V, and the frequency is 1-100 HZ. Therefore, the application range of the invention is effectively improved.
The power supply circuit comprises a resistor R3, a capacitor C3, a resistor R7, a voltage stabilizing diode D2 and a BP9918 chip. One end of the resistor R3 is electrically connected to the cathode of the diode D7, the cathode of the diode D4, and the anode of the filter capacitor C1, so as to receive the filter voltage output by the filter capacitor C1. The other end of the resistor R3 is electrically connected with the 1 pin of the BP9918 chip. One end of the resistor R7 is electrically connected with the pin 2 of the BP9918 chip, 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 anode of the voltage-stabilizing diode D2 and the other electrode of the capacitor C3 are electrically connected with the 3 pins of the BP9918 chip. The power supply circuit converts the received filter voltage into a power supply voltage and outputs the power supply voltage to the control drive circuit.
The control drive circuit comprises a drive part and a feedback part. The driving part comprises a driving MOS tube, a freewheeling diode D3, a voltage stabilizing diode D1 and a driving resistor R1. One end of the driving resistor R1 is electrically connected to the 11 pin of the control chip DRV110, and the other end of the driving resistor R1 is electrically connected to the cathode of the zener diode D1 and the gate of the driving MOS transistor. The drain of the driving MOS transistor is electrically connected to the positive electrode of the freewheeling diode D3, and the source of the driving MOS transistor is electrically connected to the pin 9 of the control chip DRV 110. The negative electrode of the freewheeling diode D3 is electrically connected with the negative electrode of the diode D7, the negative electrode of the diode D4 and one end of the resistor R3 far away from the BP9918 chip, and the pin 7 of the control chip DRV110 is electrically connected with the capacitor C3 of the power supply circuit, the negative electrode of the zener diode D2 and the pin 3 of the BP9918 chip, so that the control chip DRV110 can effectively obtain the power supply voltage. When the control chip DRV110 is powered on, the control chip DRV110 outputs two rectangular wave pulse signals with the same frequency and different widths successively at pin 11, that is, the wide pulse signal is output first, and then the narrow pulse signal is output, so as to control the conduction or the closing of the driving MOS transistor, and at the same time, the follow current is performed through the diode D3. Thereby, the output current between the positive output terminal provided at the negative electrode of the diode D3 and the negative output terminal provided at the positive electrode of the diode D3 is controlled, and the current of the solenoid coil connected between the positive output terminal and the negative output terminal is controlled. When the wide pulse signal is output, the output current is represented as a high level, so that the excitation process of the solenoid valve coil is completed, and the solenoid valve is opened. When the narrow pulse signal is output, the output current is in a low level, so that the electromagnetic valve can be kept in an open state, the current for keeping the electromagnetic valve open is effectively reduced, the power consumption of the electromagnetic valve is effectively reduced, the risk of burning the electromagnetic valve due to overheating is effectively reduced, and the running stability of the electromagnetic valve is improved.
The feedback part comprises a feedback resistor R6 and a feedback capacitor C4. The feedback resistor R6 is connected in parallel with the feedback capacitor C4, and two poles of the feedback resistor R6 are respectively and electrically connected with the pin 9 and the pin 8 of the control chip DRV110 through the feedback capacitor C4. One pole of the feedback resistor R6 is electrically connected with the source electrode of the driving MOS tube, thereby obtaining the output current. The feedback resistor R6 converts the output current into a feedback voltage and outputs the feedback voltage to the control chip DRV110, and the control chip DRV110 further controls the output current by using the feedback voltage, thereby effectively improving the control precision.
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 or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. A solenoid valve drive circuit characterized in that: the method comprises the following steps: the input rectifying filter circuit, the power supply circuit and the control drive circuit;
the input rectifying and filtering circuit is electrically connected with a power supply and outputs filtering voltage to the power supply circuit according to power supply voltage;
the power supply circuit outputs power supply voltage to the control drive circuit according to the filtering voltage;
the control driving circuit is electrically connected with the power supply circuit and comprises a control chip, and when the control chip receives the power supply voltage, the control chip outputs a wide pulse signal and a narrow pulse signal to control the output current.
2. A solenoid valve driving circuit according to claim 1, wherein: the input rectifying and filtering circuit comprises a rectifying bridge and a filtering capacitor;
the power supply voltage is input to the filter capacitor through the rectifier bridge;
the filter capacitor outputs the filter voltage to the power supply circuit according to the power supply voltage.
3. A solenoid valve driving circuit according to claim 2, wherein: the rectifier bridge is provided with a first power supply input end and a second power supply input end;
the first power input end is electrically connected with the power supply, and the second power input end is electrically connected with the power supply;
and a voltage dependent resistor is arranged between the first power supply input end and the second power supply input end.
4. A solenoid valve driving circuit according to claim 1, wherein: the control drive circuit comprises a drive part;
the driving part is electrically connected with the control chip, and the driving part controls the output current according to the wide pulse signal and the narrow pulse signal.
5. The solenoid valve driving circuit according to claim 4, wherein: the driving part comprises a driving MOS tube, a freewheeling diode, a driving resistor and a voltage stabilizing diode;
the source electrode of the driving MOS tube is electrically connected with the control chip, the grid electrode of the driving MOS tube is electrically connected with the control chip through the driving resistor, the grid electrode of the driving MOS tube is electrically connected with the negative electrode of the voltage stabilizing diode, and the drain electrode of the driving MOS tube is electrically connected with the positive electrode of the freewheeling diode;
the anode of the fly-wheel diode is provided with a negative output end, and the cathode of the fly-wheel diode is provided with a positive output end;
the driving MOS tube and the freewheeling diode control the output current between the negative output end and the positive output end according to the wide pulse signal and the narrow pulse signal.
6. A solenoid valve driving circuit according to claim 1, wherein: the control driving circuit further comprises a feedback part, the feedback part is electrically connected with the control chip, the feedback part generates feedback voltage according to the output current, and the feedback part outputs the feedback voltage to the control chip.
7. The solenoid valve driving circuit according to claim 6, wherein: the feedback part comprises a feedback resistor and a feedback capacitor;
the feedback resistor is connected with the feedback capacitor in parallel, two poles of the feedback resistor are electrically connected with the control chip through the feedback capacitor, and the feedback resistor receives the output current;
the feedback resistor generates the feedback voltage according to the output current, and the feedback resistor outputs the feedback voltage to the control chip.
8. A solenoid valve driving circuit according to claim 1, wherein: the power supply comprises a direct current power supply and an alternating current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376461.4A CN111442130B (en) | 2020-05-07 | 2020-05-07 | Electromagnetic valve driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376461.4A CN111442130B (en) | 2020-05-07 | 2020-05-07 | Electromagnetic valve driving circuit |
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| Publication Number | Publication Date |
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| CN111442130A true CN111442130A (en) | 2020-07-24 |
| CN111442130B CN111442130B (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010376461.4A Active CN111442130B (en) | 2020-05-07 | 2020-05-07 | Electromagnetic valve driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961434A (en) * | 2021-02-27 | 2022-08-30 | 西安铁路信号有限责任公司 | Electromagnetic lock driving circuit adopting forward transformation principle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104842A (en) * | 1986-07-16 | 1988-02-03 | 邢士强 | Electromagnet energy economizing controller |
| JPH11193876A (en) * | 1998-01-05 | 1999-07-21 | Koganei Corp | Solenoid valve |
| CN205781229U (en) * | 2016-04-27 | 2016-12-07 | 济南市大秦机电设备有限公司 | Electromagnetic valve coil power conditioning circuitry |
| CN108156681A (en) * | 2017-12-20 | 2018-06-12 | 厦门著赫电子科技有限公司 | A kind of electromagnetic coil driving circuit |
| CN109185539A (en) * | 2018-10-27 | 2019-01-11 | 慈溪市泰姆电气有限公司 | A kind of band overcurrent protection automatic energy saving solenoid valve control circuit |
-
2020
- 2020-05-07 CN CN202010376461.4A patent/CN111442130B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104842A (en) * | 1986-07-16 | 1988-02-03 | 邢士强 | Electromagnet energy economizing controller |
| JPH11193876A (en) * | 1998-01-05 | 1999-07-21 | Koganei Corp | Solenoid valve |
| CN205781229U (en) * | 2016-04-27 | 2016-12-07 | 济南市大秦机电设备有限公司 | Electromagnetic valve coil power conditioning circuitry |
| CN108156681A (en) * | 2017-12-20 | 2018-06-12 | 厦门著赫电子科技有限公司 | A kind of electromagnetic coil driving circuit |
| CN109185539A (en) * | 2018-10-27 | 2019-01-11 | 慈溪市泰姆电气有限公司 | A kind of band overcurrent protection automatic energy saving solenoid valve control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961434A (en) * | 2021-02-27 | 2022-08-30 | 西安铁路信号有限责任公司 | Electromagnetic lock driving circuit adopting forward transformation principle |
| CN114961434B (en) * | 2021-02-27 | 2023-09-12 | 西安铁路信号有限责任公司 | Electromagnetic lock driving circuit adopting forward conversion principle |
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| Publication number | Publication date |
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| CN111442130B (en) | 2022-03-11 |
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