CN106602875A - DC solenoid valve driving circuit and PWM control method based on the same - Google Patents
DC solenoid valve driving circuit and PWM control method based on the same Download PDFInfo
- Publication number
- CN106602875A CN106602875A CN201611095304.6A CN201611095304A CN106602875A CN 106602875 A CN106602875 A CN 106602875A CN 201611095304 A CN201611095304 A CN 201611095304A CN 106602875 A CN106602875 A CN 106602875A
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- China
- Prior art keywords
- resistance
- electromagnetic valve
- microprocessor
- driving circuit
- audion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a DC solenoid valve driving circuit including a microprocessor for transmitting, processing and receiving signals; a signal amplifying circuit for amplifying a transmission signal of the microprocessor to control a driving circuit; the driving circuit for transferring supply voltage to a DC solenoid valve to power the DC solenoid valve, wherein the input end of the signal amplifying circuit is connected with the microprocessor, and the output end of the signal amplifying circuit is connected with the driving circuit. The invention also provides a PWM control method based on the DC solenoid valve driving circuit. By using the DC solenoid valve driving circuit to power the DC solenoid valve and by adjusting the PWM to output different voltage, DC solenoid valves with different voltage specifications are satisfied.
Description
Technical field
The present invention relates to DC electromagnetic valve power supply technique field, it is especially a kind of DC electromagnetic valve driving circuit and should
PWM control methods based on DC electromagnetic valve driving circuit.
Background technology
DC electromagnetic valve is common part in DC frequency converting air-conditioner.Due to the difference of the demands such as power, therefore in direct current
Generally there is in convertible frequency air-conditioner the DC electromagnetic valve of multiple voltage specification, such as adopt DC12V, DC24V, DC36V, DC48V etc. many
Plant the electromagnetic valve that voltage specification is powered.But, in the power supply of DC frequency converting air-conditioner, typically only with one or two kinds of direct current
Voltage specification is powered, and in order to meet the DC electromagnetic valve of above-mentioned multiple voltage specification, needs to increase the structures such as switching tube, loop,
This complicated power supply architecture can not only increase the manufacturing cost of power supply, and can reduce the reliability of power supply.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of DC electromagnetic valve driving circuit and based on DC electromagnetic valve
The PWM control methods of driving circuit, are powered to DC electromagnetic valve by DC electromagnetic valve driving circuit, while by adjusting PWM
To export different voltages, and then meet the DC electromagnetic valve of different voltage specifications.
The technical scheme is that, there is provided a kind of DC electromagnetic valve driving circuit, including
Microprocessor, for the transmission of signal, is processed and reception；
Signal amplification circuit, for being amplified to control drive circuit by the sending signal of microprocessor；
Drive circuit, for supply voltage to be delivered to DC electromagnetic valve to be powered DC electromagnetic valve；
The input of the signal amplification circuit is connected with microprocessor, outfan and the driving of the signal amplification circuit
Circuit connects.
Described signal amplification circuit includes audion Q2, resistance R11；One end of the resistance R11 is connected with microprocessor
Connect, the other end of the resistance R11 is connected with the b poles of audion Q2；The e poles of the audion Q2 are connected with common ground end；
The c poles of the audion Q2 are connected with signal amplification circuit.
Described signal amplification circuit includes optocoupler E1, resistance R1；The negative input end of the optocoupler E1 is connected with microprocessor
Connect, the positive input terminal of the optocoupler E1 is connected with one end of resistance R1；The other end of the resistance R1 is connected with positive source；Institute
The negative output terminal for stating optocoupler E1 is connected with common ground end；The positive output end of the optocoupler E1 is connected with signal amplification circuit.
Described drive circuit includes audion Q1, resistance R2, R3, electric capacity C1, diode D1；The one of the resistance R2
End, one end of resistance R3 are connected with signal amplification circuit；The other end of the resistance R3, the e poles of audion Q1, valve are powered electricity
The positive pole connection in source；The other end of the resistance R2 is connected with the b poles of audion Q1；The c poles of the audion Q1 and unidirectional current
The negative electrode connection of magnet valve, diode D1；The anode of the diode D1 is all connected with DC electromagnetic valve, common ground end.
Described direct solenoid valve-driving circuit also includes a feedback circuit, and described feedback circuit includes resistance R4, little
Resistance variable resistance RS, electric capacity C1；The little resistance variable resistance RS be connected on the anode of diode D1 and DC electromagnetic valve it
Between；The little resistance variable resistance RS, the public connecting end of DC electromagnetic valve are connected with one end of resistance R4；The resistance R4's
The other end is connected with one end of microprocessor, electric capacity C1；The other end of the electric capacity C1 is connected with common ground end.
A kind of PWM control methods of DC electromagnetic valve driving circuit, the magnitude of voltage for arranging DC electromagnetic valve are target voltage
Value Va；The magnitude of voltage for arranging power supply is magnitude of voltage Vb；Comprise the following steps：
(1), target voltage values Va and magnitude of voltage Vb are brought into formula dutycycleObtain dutycycle D；
(2), bring dutycycle D into formulaDraw cycle T；
(3), cycle t1 is set so that t1<T；
(4) after, being processed cycle t1 and dutycycle D input microprocessor, output control signal is to DC electromagnetic valve
Driving circuit.
Described PWM control methods are further comprising the steps of：A, microprocessor receive the sampled signal of feedback circuit passback,
Obtain sampled value；B, when sampled value be more than target voltage values Va when, reduce dutycycle D；When sampled value is equal to target voltage values Va
When, dutycycle D keeps constant；When sampled value is less than target voltage values Va, increase dutycycle D.
After above structure and method, the present invention compared with prior art, with advantages below：
The present invention is adjusted controlling DC electromagnetic valve by software PWM dutycycle and cycle so that different voltages
The DC electromagnetic valve of specification can obtain corresponding running voltage, and without the need for increasing the knot such as switching tube, loop in on-off circuit again
Structure.It is individually power supply using the power supply that each DC electromagnetic valve is caused after the structure, reduces phase between each DC electromagnetic valve
The probability for mutually affecting, while this simple power supply architecture not only reduces the manufacturing cost of power supply, and improves power supply
Functional reliability.
Further, described direct solenoid valve-driving circuit also includes a feedback circuit, the input of the feedback circuit
End is connected with the e poles of audion Q2, and the outfan of the feedback circuit is connected with microprocessor.The feedback circuit can be effectively
Voltage is finely adjusted, so that the functional reliability of DC electromagnetic valve is improved.
Description of the drawings
Fig. 1 is the circuit block diagram of DC electromagnetic valve driving circuit of the present invention.
Fig. 2 is the circuit theory diagrams of the embodiment 1 of DC electromagnetic valve driving circuit scheme of the present invention 1.
Fig. 3 is the circuit theory diagrams of the embodiment 1 of DC electromagnetic valve driving circuit scheme of the present invention 2.
Fig. 4 is the circuit theory diagrams of the embodiment 2 of DC electromagnetic valve driving circuit scheme of the present invention 1.
Fig. 5 is the circuit theory diagrams of the embodiment 2 of DC electromagnetic valve driving circuit scheme of the present invention 2.
Fig. 6 is current waveform oscillogram.
Specific embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of DC electromagnetic valve driving circuit of the invention, including
Microprocessor, for the transmission of signal, is processed and reception, and in the present embodiment, microprocessor sends a signal to
Feedback signal is sent to microprocessor so that microprocessor is analyzed and processes by Xinda amplifying circuit, feedback circuit；
Signal amplification circuit, for being amplified to control drive circuit by the sending signal of microprocessor；
Drive circuit, for supply voltage to be delivered to DC electromagnetic valve to be powered DC electromagnetic valve；
The input of the signal amplification circuit is connected with microprocessor, outfan and the driving of the signal amplification circuit
Circuit connects.
Described signal amplification circuit includes audion Q2, resistance R11；One end of the resistance R11 is connected with microprocessor
Connect, the other end of the resistance R11 is connected with the b poles of audion Q2；The e poles of the audion Q2 are connected with common ground end；
The c poles of the audion Q2 are connected with signal amplification circuit.The structure is as shown in Figure 2.
Described signal amplification circuit includes optocoupler E1, resistance R1；The negative input end of the optocoupler E1 is connected with microprocessor
Connect, the positive input terminal of the optocoupler E1 is connected with one end of resistance R1；The other end of the resistance R1 is connected with positive source；Institute
The negative output terminal for stating optocoupler E1 is connected with common ground end；The positive output end of the optocoupler E1 is connected with signal amplification circuit.Should
Structure is as shown in Figure 3.
Described drive circuit includes audion Q1, resistance R2, R3, electric capacity C1, diode D1；The one of the resistance R2
End, one end of resistance R3 are connected with signal amplification circuit；The other end of the resistance R3, the e poles of audion Q1, valve are powered electricity
The positive pole connection in source；The other end of the resistance R2 is connected with the b poles of audion Q1；The c poles of the audion Q1 and unidirectional current
The negative electrode connection of magnet valve, diode D1；The anode of the diode D1 is all connected with DC electromagnetic valve, common ground end.
Described direct solenoid valve-driving circuit also includes a feedback circuit, and described feedback circuit includes resistance R4, little
Resistance variable resistance RS, electric capacity C1；The little resistance variable resistance RS be connected on the anode of diode D1 and DC electromagnetic valve it
Between；The little resistance variable resistance RS, the public connecting end of DC electromagnetic valve are connected with one end of resistance R4；The resistance R4's
The other end is connected with one end of microprocessor, electric capacity C1；The other end of the electric capacity C1 is connected with common ground end.Two kinds of signals
Amplifying circuit adds the structure of feedback circuit respectively as shown in Figure 4, Figure 5.
A kind of PWM control methods of DC electromagnetic valve driving circuit, the magnitude of voltage for arranging DC electromagnetic valve are target voltage
Value Va；The magnitude of voltage for arranging power supply is magnitude of voltage Vb, in general Vb>Va, and Vb can possibly fluctuate or change, but it is necessary
Ensure Vb>Va；Comprise the following steps：
(1), by target voltage values Va and magnitude of voltage Vb input microprocessors, microprocessor passes through dutycycleCalculate,
Obtain dutycycle D；
(2), microprocessor brings dutycycle D into formula againCalculate cycle T；
(3) cycle t1 is arranged according to dutycycle, so that t1<T, in the present embodiment, as long as cycle t1 less than cycle T is
Can；
(4) after, being processed cycle t1 and dutycycle D input microprocessor, output control signal is to DC electromagnetic valve
Driving circuit, makes the rated current that the electric current for flowing through electromagnetic valve is just that electromagnetic valve needs by the turn-on and turn-off of Q1.
In embodiment, dutycycleFor dutycycle computing formula common to those skilled in the art, as open loop control
System or the initial setting up of closed loop control.
Described PWM control methods also include：Connected on Electromagnetic Valve Circuit 1 current sampling resistor Rs, from Rs
Filtered direct current signals of RC that the signal of telecommunication of sampling is constituted via R4, C1 again simultaneously deliver to the AD mouths of microprocessor；Described PWM
Control method is further comprising the steps of：The dutycycle opens solenoid valve of a, microprocessor by initial setting up, receives Rs and RC filtering
The sampled signal of feedback circuit passback, obtains sampled value；B, when sampled value be more than target voltage values Va when, reduce dutycycle D or
Person reduces t1；When sampled value is equal to target voltage values Va, dutycycle D keeps constant；When sampled value is less than target voltage values Va
When, increase dutycycle D or increase t1.The regulation of dutycycle in the step is adjusted by PID.
Current waveform figures of the Fig. 6 for DC electromagnetic valves.An inductance and an internal resistance can be equivalent to inside electromagnetic valve.Diagram
Middle T is PWM cycle, and t1 is high level (ON time), and t2 is low level (turn-off time).I is to flow through induction coil current,
To flow through the direct current meansigma methodss of coil, r is electromagnetic valve DC internal resistance.
PWM duty cycle=t1/T,Rated voltages of the wherein U for DC electromagnetic valves.
Below only highly preferred embodiment of the present invention is described, but is not to be construed as limiting the scope of the invention.This
Invention is not limited only to above example, and its concrete structure allows to change.In every case in the protection model of independent claims of the present invention
Enclose interior made various change within the scope of the present invention.
Claims (7)
1. a kind of DC electromagnetic valve driving circuit, it is characterised in that：Including
Microprocessor, for the transmission of signal, is processed and reception；
Signal amplification circuit, for being amplified to control drive circuit by the sending signal of microprocessor；
Drive circuit, for supply voltage to be delivered to DC electromagnetic valve to be powered DC electromagnetic valve；
The input of the signal amplification circuit is connected with microprocessor, the outfan and drive circuit of the signal amplification circuit
Connection.
2. DC electromagnetic valve driving circuit according to claim 1, it is characterised in that：Described signal amplification circuit includes
Audion Q2, resistance R11；One end of the resistance R11 is connected with microprocessor, the other end and audion of the resistance R11
The b poles connection of Q2；The e poles of the audion Q2 are connected with common ground end；The c poles of the audion Q2 and signal amplification circuit
Connection.
3. DC electromagnetic valve driving circuit according to claim 1, it is characterised in that：Described signal amplification circuit includes
Optocoupler E1, resistance R1；The negative input end of the optocoupler E1 is connected with microprocessor, positive input terminal and the resistance R1 of the optocoupler E1
One end connection；The other end of the resistance R1 is connected with positive source；The negative output terminal of the optocoupler E1 and common ground end
Connection；The positive output end of the optocoupler E1 is connected with signal amplification circuit.
4. the DC electromagnetic valve driving circuit according to Claims 2 or 3, it is characterised in that：Described drive circuit includes
Audion Q1, resistance R2, R3, electric capacity C1, diode D1；One end of the resistance R2, one end of resistance R3 are amplified with signal
Circuit connects；The other end of the resistance R3, the e poles of audion Q1, the positive pole connection of valve power supply；The resistance R2's is another
One end is connected with the b poles of audion Q1；The c poles of the audion Q1 are connected with the negative electrode of DC electromagnetic valve, diode D1；It is described
The anode of diode D1 is all connected with DC electromagnetic valve, common ground end.
5. DC electromagnetic valve driving circuit according to claim 4, it is characterised in that：Described direct solenoid electrohydraulic valve actuator
Road also includes a feedback circuit, and described feedback circuit includes resistance R4, little resistance variable resistance RS, electric capacity C1；The little resistance
Value variable resistance RS is connected between the anode and DC electromagnetic valve of diode D1；The little resistance variable resistance RS, unidirectional current
The public connecting end of magnet valve is connected with one end of resistance R4；The other end of the resistance R4 and microprocessor, one end of electric capacity C1
Connection；The other end of the electric capacity C1 is connected with common ground end.
6. a kind of PWM control methods based on driving circuit in claim 5, it is characterised in that：The electricity of DC electromagnetic valve is set
Pressure value is target voltage values Va；The magnitude of voltage for arranging power supply is magnitude of voltage Vb；Comprise the following steps：
(1), target voltage values Va and magnitude of voltage Vb are brought into formula dutycycleObtain dutycycle D；
(2), bring dutycycle D into formulaDraw cycle T；
(3), cycle t1 is set so that t1<T；
(4) after, being processed cycle t1 and dutycycle D input microprocessor, output control signal is driven to DC electromagnetic valve
Loop.
7. according to the PWM control methods in claim 6, it is characterised in that：Described PWM control methods also include following step
Suddenly：A, microprocessor receive the sampled signal of feedback circuit passback, obtain sampled value；B, when sampled value be more than target voltage values Va
When, reduce dutycycle D；When sampled value is equal to target voltage values Va, dutycycle D keeps constant；When sampled value is less than target electricity
During pressure value Va, increase dutycycle D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095304.6A CN106602875A (en) | 2016-12-02 | 2016-12-02 | DC solenoid valve driving circuit and PWM control method based on the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095304.6A CN106602875A (en) | 2016-12-02 | 2016-12-02 | DC solenoid valve driving circuit and PWM control method based on the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106602875A true CN106602875A (en) | 2017-04-26 |
Family
ID=58596160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611095304.6A Pending CN106602875A (en) | 2016-12-02 | 2016-12-02 | DC solenoid valve driving circuit and PWM control method based on the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106602875A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477240A (en) * | 2017-09-30 | 2017-12-15 | 武汉浩宏科技有限公司 | Solenoid valve control circuit |
| CN110159614A (en) * | 2018-02-13 | 2019-08-23 | 昆达电脑科技(昆山)有限公司 | Cylinder solenoids control system |
| CN111061327A (en) * | 2019-12-12 | 2020-04-24 | 联合汽车电子有限公司 | Closed-loop control system and closed-loop control method of driving circuit |
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| US20010011885A1 (en) * | 2000-02-07 | 2001-08-09 | Shin Nakagawa | Voltage step down type DC-DC converter having a coupled inductor |
| CN1967035A (en) * | 2006-10-19 | 2007-05-23 | 上海凌同电子科技有限公司 | Double-peak-voltage holding high-speed solenoid valve drive circuit |
| CN101149594A (en) * | 2006-09-22 | 2008-03-26 | 广东万和集团有限公司 | Gas ratio valve control circuit |
| CN102255487A (en) * | 2011-06-30 | 2011-11-23 | 纽福克斯光电科技（上海）有限公司 | Inverting circuit |
| CN102314187A (en) * | 2010-06-30 | 2012-01-11 | 比亚迪股份有限公司 | Direct-current voltage proportion output circuit and control method thereof |
| CN203926087U (en) * | 2014-04-01 | 2014-11-05 | 佛山市顺德万和电气配件有限公司 | Gas water-heater DC fan control gear |
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2016
- 2016-12-02 CN CN201611095304.6A patent/CN106602875A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010011885A1 (en) * | 2000-02-07 | 2001-08-09 | Shin Nakagawa | Voltage step down type DC-DC converter having a coupled inductor |
| CN101149594A (en) * | 2006-09-22 | 2008-03-26 | 广东万和集团有限公司 | Gas ratio valve control circuit |
| CN1967035A (en) * | 2006-10-19 | 2007-05-23 | 上海凌同电子科技有限公司 | Double-peak-voltage holding high-speed solenoid valve drive circuit |
| CN102314187A (en) * | 2010-06-30 | 2012-01-11 | 比亚迪股份有限公司 | Direct-current voltage proportion output circuit and control method thereof |
| CN102255487A (en) * | 2011-06-30 | 2011-11-23 | 纽福克斯光电科技（上海）有限公司 | Inverting circuit |
| CN203926087U (en) * | 2014-04-01 | 2014-11-05 | 佛山市顺德万和电气配件有限公司 | Gas water-heater DC fan control gear |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477240A (en) * | 2017-09-30 | 2017-12-15 | 武汉浩宏科技有限公司 | Solenoid valve control circuit |
| CN110159614A (en) * | 2018-02-13 | 2019-08-23 | 昆达电脑科技(昆山)有限公司 | Cylinder solenoids control system |
| CN111061327A (en) * | 2019-12-12 | 2020-04-24 | 联合汽车电子有限公司 | Closed-loop control system and closed-loop control method of driving circuit |
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Application publication date: 20170426 |