CN217634159U - Low-power consumption electromagnetic valve control circuit - Google Patents
Low-power consumption electromagnetic valve control circuit Download PDFInfo
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- CN217634159U CN217634159U CN202220591237.1U CN202220591237U CN217634159U CN 217634159 U CN217634159 U CN 217634159U CN 202220591237 U CN202220591237 U CN 202220591237U CN 217634159 U CN217634159 U CN 217634159U
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Abstract
The utility model discloses a low-power consumption solenoid valve control circuit, through set up coil control circuit between DC power supply and solenoid valve coil, after the solenoid valve coil got the electricity, the controller work and give a PWM pulse signal of first triode circuit, first triode circuit switches the high-low level, control second triode circuit switches on or ends, and then control the intermittent type break-make of solenoid valve coil, because the solenoid valve keeps the actuation state throughout in the in-process of short outage, make the solenoid valve be in normal operating condition, but can reduce the thermal power of solenoid valve coil, reach the purpose that reduces power loss; even if the external world causes interference to the controller or the controller generates a transient pulse signal error due to the error of the controller system, the first triode circuit cannot realize high-low level switching at the moment, the control end of the second triode circuit always keeps high level to be conducted, the two ends of the electromagnetic valve coil are directly connected to the two ends of the power supply to work at rated voltage, and the structure is more stable and reliable.
Description
Technical Field
The utility model relates to a solenoid valve control technical field, concretely relates to low-power consumption solenoid valve control circuit.
Background
When a user electrically controls machinery, the electromagnetic valve is often adopted to control the on-off of the air path to conveniently realize switching, and further automatic control is realized on the machinery, so that the reliability of the electromagnetic valve is very important.
The existing electromagnetic valve is found in the using process, after the electromagnetic valve works continuously for a period of time, the temperature of a shell can rise rapidly, and particularly, the situation of overheating is easy to happen in summer, so that an inductance coil is burnt, and normal production is influenced. If the heating value of the electromagnetic valve coil is reduced, and meanwhile, the effective work power of the electromagnetic valve is ensured, the problem that the electromagnetic valve is burnt due to overheating can be avoided, for example, the electromagnetic valve and the circuit control method which reduce the power consumption are disclosed in the patent number '201710489133.3', a single chip microcomputer control system outputs pulse voltage, the voltage duty ratio is output to the electromagnetic valve coil through a power tube, the electromagnetic valve is triggered to act, the intermittent power supply to the electromagnetic valve coil is realized, and therefore the heat power of the electromagnetic coil is reduced. However, when the external causes interference to the system of the single chip microcomputer or a short pulse signal or a certain periodic pulse signal of the single chip microcomputer is wrong due to the system of the single chip microcomputer, the voltage at two ends of a coil of the electromagnetic valve can be influenced, and the electromagnetic valve cannot work normally, and is not stable and reliable enough.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the present invention provides a low power consumption solenoid valve control circuit to solve the deficiencies of the prior art.
The utility model discloses mainly realize through following technical scheme:
the utility model provides a low-power consumption solenoid valve control circuit, include power supply circuit, be used for controlling the coil control circuit of solenoid valve coil break-make, coil control circuit includes controller, first resistance, second resistance, first triode circuit, second triode circuit, power supply circuit is connected with the DC power supply electricity, the first tip of first resistance, second resistance is connected with the positive pole electricity of DC power supply respectively, the second tip of first resistance is connected with power supply circuit, controller electricity respectively, the controller is connected with the control end of first triode circuit, DC power supply's negative pole electricity respectively, the second tip of second resistance is connected with the control end of second triode circuit, the first tip of first triode circuit, power supply circuit electricity respectively, the first tip of second triode circuit, the second tip of first triode circuit are connected with DC power supply's negative pole electricity respectively, the second tip of second triode circuit is connected with the second tip of solenoid valve coil electricity, the first tip of solenoid valve coil is connected with DC power supply's positive pole electricity.
Furthermore, the first triode circuit comprises a third resistor and a triode, the control end of the triode is connected with the controller in series through the third resistor, and the triode is electrically connected with the power supply circuit, the control end of the second triode circuit and the negative electrode of the direct-current power supply respectively.
Furthermore, the second triode circuit comprises a first diode, a second diode and a field effect tube, wherein after the first diode and the second diode are reversely connected, the cathode of the first diode is electrically connected with the control electrode of the field effect tube, the cathode of the second diode is electrically connected with the source electrode of the field effect tube, the drain electrode of the field effect tube is electrically connected with the cathode of the direct-current power supply, and the source electrode of the field effect tube is electrically connected with the second end part of the solenoid valve coil.
The electromagnetic valve further comprises a follow current circuit, wherein the follow current circuit comprises a bidirectional diode and a fourth resistor, after the bidirectional diode is connected with the fourth resistor in series, the first end part of the fourth resistor is electrically connected with the first end part of the electromagnetic valve coil, and the bidirectional diode is electrically connected with the second end part of the electromagnetic valve coil.
Furthermore, the power circuit comprises a filtering unit and a voltage stabilizing unit, the filtering unit is connected in parallel to two ends of the dc power supply, a first end of the voltage stabilizing unit is electrically connected to a second end of the first resistor, the first end of the voltage stabilizing unit is electrically connected to a first end of the first triode circuit through a fifth resistor, and the second end of the voltage stabilizing unit is electrically connected to a negative electrode of the dc power supply.
Furthermore, the two ends of the fourth resistor are connected in parallel with an indicator light.
Furthermore, an anti-reverse diode is arranged between the connection position of the power circuit and the first end of the first resistor and the positive electrode of the direct current power supply.
Further, the filter unit is a filter capacitor.
Furthermore, the voltage stabilizing unit comprises a first capacitor and a voltage stabilizing diode which are arranged in parallel, the cathode of the voltage stabilizing diode is electrically connected with the second end of the first resistor, and the two ends of the first capacitor are connected with a sixth resistor in parallel.
Further, the controller is a single chip microcomputer.
Compared with the prior art the utility model discloses technical scheme's beneficial effect does:
1. the utility model provides a low-power consumption solenoid valve control circuit, through set up coil control circuit between DC power supply and solenoid valve coil, the solenoid valve coil gets the electricity after, controller work is and give PWM pulse signal of first triode circuit, first triode circuit switches the high-low level, control second triode circuit switches on or ends, and then control solenoid valve coil's intermittent type break-make, because the in-process solenoid valve at the short-term outage remains the actuation state throughout, make the solenoid valve be in normal operating condition, but can reduce solenoid valve coil's thermal power, reach the purpose that reduces power loss.
2. When the external interference is caused to the controller or the error is caused to the controller system, the controller generates a transient pulse signal error or a certain periodic pulse signal error, at the moment, the first triode circuit cannot realize high-low level switching, because the direct current power supply is directly connected with the control end of the second triode circuit to form a closed loop, the direct current power supply is used for directly supplying power, the high level is always kept for conduction, the electromagnetic valve coil is directly connected with the two ends of the power supply to work at rated voltage, the transient energy is not saved, and the electromagnetic valve coil cannot be damaged, so that the structure is more stable and reliable, the cost is lower, and the structure is simpler.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a low-power-consumption solenoid valve control circuit provided by an embodiment of the present invention;
fig. 2 is a diagram of waveforms of operating voltages at two ends of a solenoid coil in a low-power-consumption solenoid valve control circuit provided by an embodiment of the present invention.
The reference numbers are as follows:
1. a power supply circuit 2, a coil 3, a controller 4, a first resistor 5, a second resistor 6, a first triode circuit, 7, a second triode circuit 8, a direct current power supply 9, a follow current circuit 10, a filtering unit 11 and a voltage stabilizing unit.
Detailed Description
In order to better understand the invention for those skilled in the art and to define the claimed scope more clearly, the invention will be described in detail below with respect to certain specific embodiments of the invention. It should be noted that the following description is only a few examples of the present invention, and the specific and direct descriptions of the related structures are only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of the present invention. Conventional alternatives and substitutions made by those skilled in the art in light of the teachings of the present disclosure should be considered within the scope of the present disclosure.
The invention will be further explained with reference to the drawings and the specific embodiments.
Example 1
As shown in fig. 1-2, the utility model provides a low-power consumption solenoid valve control circuit, including power supply circuit 1, a coil control circuit for controlling 2 break-make of solenoid valve coil, coil control circuit includes controller 3, first resistance 4, second resistance 5, first triode circuit 6, second triode circuit 7, power supply circuit 1 is connected with DC power supply 8 electricity, first resistance 4, the first tip of second resistance 5 is connected with DC power supply 8's anodal electricity respectively, the second tip of first resistance 4 is respectively with power supply circuit 1, controller 3 electricity is connected, controller 3 is respectively with first triode circuit 6's control end, DC power supply 8's negative pole electricity is connected, the second tip of second resistance 5 is respectively with second triode circuit 7's control end, the first tip of first triode circuit 6, power supply circuit 1 electricity is connected, the first tip of second triode circuit 7, the second tip of first triode circuit 6 is connected with DC power supply circuit 8's negative pole electricity respectively, the second tip of second triode circuit 7 is connected with solenoid valve coil 2's second tip, the first tip of solenoid valve coil is connected with DC power supply circuit 8 electricity. The electromagnetic valve is mainly applicable to textile machinery, but not limited to the above fields, and the electromagnetic valve can be electrified for a long time or the power consumption of the electromagnetic valve can be reduced, so that the electromagnetic valve belongs to the applicable range.
In this embodiment, the first resistor 4 is R1, and the second resistor 5 is R5. The controller 3 is a single chip microcomputer, the single chip microcomputer does not work within 0-20ms after the two ends of the coil 2 are connected with voltage, the single chip microcomputer starts to work after 20ms, time can be set according to actual needs, and the single chip microcomputer starts to work preferably after 10-20 ms.
Specifically, the power supply circuit 1 includes a filtering unit 10 and a voltage stabilizing unit 11, the filtering unit 10 is connected in parallel to two ends of the dc power supply 8, a first end of the voltage stabilizing unit 11 is electrically connected to a second end of the first resistor 4, a first end of the voltage stabilizing unit 11 is electrically connected to a first end of the first triode circuit 6 through the fifth resistor R3, and a second end of the voltage stabilizing unit 11 is electrically connected to a negative electrode of the dc power supply 8. The filtering unit 10 absorbs noise of the dc power supply 8, and the voltage stabilizing unit 11 is provided to stabilize the voltage supplied by the controller 3, so that the controller 3 is more stable and reliable.
Preferably, the filter unit 10 is a filter capacitor C1.
Preferably, the voltage stabilizing unit 11 includes a first capacitor C2 and a voltage stabilizing diode D2, which are connected in parallel, a cathode of the voltage stabilizing diode D2 is electrically connected to the second end of the first resistor 4, and two ends of the first capacitor C2 are connected in parallel to a sixth resistor R2.
Preferably, the first triode circuit 6 includes a third resistor R4 and a triode Q1, a control terminal of the triode Q1 is connected in series with the controller 3 through the third resistor R4, and the triode Q1 is electrically connected to the power circuit 1, a control terminal of the second triode circuit 7, and a negative electrode of the dc power supply 8, respectively.
In this embodiment, the single chip microcomputer is electrically connected to the second end of the first resistor R1, the first end of the sixth resistor R2, the first end of the first capacitor C2, and the cathode of the zener diode D2, the first end of the triode Q1 and the second end of the second resistor R5 are electrically connected, and the triode Q1 is a low frequency triode, specifically, a PNP tube.
Preferably, the second triode circuit 7 includes a first diode D3, a second diode D4 and a field effect transistor Q2, after the first diode D3 and the second diode D4 are connected in reverse, one end of the cathode of the first diode D3 is electrically connected to the control electrode (i.e., G electrode) of the field effect transistor Q2, the cathode of the second diode D4 is electrically connected to the source electrode (i.e., S electrode) of the field effect transistor Q2, the drain electrode (i.e., D electrode) of the field effect transistor Q2 is electrically connected to the cathode of the dc power supply 8, and the source electrode of the field effect transistor Q2 is electrically connected to the second end portion of the solenoid valve coil 2.
In this embodiment, the field effect transistor Q2 is an N-channel MOS transistor, and when the triode Q1 cannot realize high-low level switching, the control terminal of the MOS transistor always maintains a high level, so that the drain and the source of the MOS transistor are turned on.
After the electromagnetic valve coil 2 is electrified for 20ms, the single chip microcomputer starts to work, the single chip microcomputer gives a PWM pulse signal to the triode Q1, and after the triode Q1 obtains the pulse signal of the single chip microcomputer, high-low level switching can be achieved on the G pole voltage of the field effect tube Q2, so that the D pole and the S pole of the field effect tube Q2 are switched on and off.
The PWM pulse signal has an on-off period of 52 mus and a duty ratio of 0.3-0.4, namely, the on-time is 15.6-20.8 mus, the off-time is 31.2 mus-36.4, and the PWM pulse signal is realized by adopting a pulse width modulation principle, so that the smaller the duty ratio is, the lower the energy consumption is. The on-time is 18 mus, the off-time is 34 mus, because each power-off period is only 34us, the suction force of the coil 2 can not be instantly reduced to 0 in a very short time, because the solenoid valve coil 2 can generate a suction force which is much larger than that in the initial state after being sucked, the suction force is kept much smaller than that generated under the rated voltage, so that the movable iron core of the solenoid valve can not be separated from the static iron core due to short power-off, the solenoid valve is ensured to be still in the suction state in the power-off process, and the pulsation noise generated during the work of the solenoid valve is avoided.
Preferably, the electromagnetic valve further comprises a freewheeling circuit 9, the freewheeling circuit 9 comprises a bidirectional diode D6 and a fourth resistor R6, after the bidirectional diode D6 is connected in series with the fourth resistor R6, a first end of the fourth resistor R6 is electrically connected with a first end of the electromagnetic valve coil 2, and the bidirectional diode D6 is electrically connected with a second end of the electromagnetic valve coil 2.
The bidirectional diode D6 and the fourth resistor R6 are connected in parallel at two ends of the solenoid valve coil 2 to play a role of follow current, and the controller 3 and related elements are prevented from being damaged by high voltage formed by self-induced electromotive force when the coil 2 is powered off.
Specifically, the two ends of the fourth resistor R6 are connected in parallel with an indicator lamp to indicate the on-off state of the solenoid valve.
In this embodiment, the indicator light is a diode D5.
Preferably, a reverse connection prevention diode D1 is arranged between the connection position of the power circuit 1 and the first end of the first resistor 4 and the positive electrode of the direct current power supply 8, so as to prevent circuit faults caused by reverse connection of the direct current power supply 8.
In this embodiment, the reverse connection preventing diode D1 is a schottky diode, and the first end of the filter capacitor C1 and the first end of the first resistor R1 are electrically connected to the cathode of the reverse connection preventing diode D1, respectively.
When the solenoid valve needs to be powered on to work, namely, the two ends of the direct current power supply 8 provide direct current voltage, wherein the voltage value is the rated working voltage of the solenoid valve coil, after the voltage is switched on, a point B in the figure 1 can continuously generate a high level, namely, a D pole and an S pole of a field effect tube Q2 are switched on, and the two ends of the coil 2 work at the rated voltage to generate suction force, so that the movable iron core and the static iron core of the solenoid valve are attracted. Along with the extension of time, after 20ms, the single chip microcomputer starts to work, and the single chip microcomputer controls the D pole and the S pole of the field-effect tube Q2 to be switched on and off by applying a PWM pulse signal to the triode Q1, so that the two ends of the electromagnetic valve coil 2 are periodically powered off. In the whole electrifying period, the thermal power of the electromagnetic valve coil 2 is reduced, so that the power of the whole control circuit is about 0.5W, and under the condition of rated voltage operation, the power of the electromagnetic valve is about 4W, and the aim of reducing power loss is achieved.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A low-power consumption solenoid valve control circuit which characterized in that: comprises a power circuit (1) and a coil control circuit for controlling the on-off of a coil (2) of an electromagnetic valve, the coil control circuit comprises a controller (3), a first resistor (4), a second resistor (5), a first triode circuit (6) and a second triode circuit (7), the power circuit (1) is electrically connected with a direct current power supply (8), the first end parts of the first resistor (4) and the second resistor (5) are respectively electrically connected with the positive electrode of the direct current power supply (8), the second end part of the first resistor (4) is respectively and electrically connected with the power circuit (1) and the controller (3), the controller (3) is respectively electrically connected with the control end of the first triode circuit (6) and the negative electrode of the direct current power supply (8), the second end part of the second resistor (5) is respectively and electrically connected with the control end of the second triode circuit (7), the first end part of the first triode circuit (6) and the power circuit (1), the first end part of the second triode circuit (7) and the second end part of the first triode circuit (6) are respectively and electrically connected with the cathode of the direct current power supply (8), the second end part of the second triode circuit (7) is electrically connected with the second end part of the solenoid valve coil (2), the first end part of the electromagnetic valve coil (2) is electrically connected with the positive electrode of the direct current power supply (8).
2. The low power consumption solenoid valve control circuit of claim 1, wherein: the first triode circuit (6) comprises a third resistor and a triode, the control end of the triode is connected with the controller (3) in series through the third resistor, and the triode is electrically connected with the power circuit (1), the control end of the second triode circuit (7) and the negative electrode of the direct-current power supply (8) respectively.
3. The low power consumption solenoid valve control circuit of claim 2, wherein: the second triode circuit (7) comprises a first diode, a second diode and a field effect tube, wherein the negative electrode of the first diode is electrically connected with the control electrode of the field effect tube after the first diode and the second diode are reversely connected, the negative electrode of the second diode is electrically connected with the source electrode of the field effect tube, the drain electrode of the field effect tube is electrically connected with the negative electrode of the direct current power supply (8), and the source electrode of the field effect tube is electrically connected with the second end part of the electromagnetic valve coil (2).
4. A low power consumption solenoid valve control circuit according to any one of claims 1-3, wherein: the electromagnetic valve is characterized by further comprising a follow current circuit (9), wherein the follow current circuit (9) comprises a bidirectional diode and a fourth resistor, after the bidirectional diode and the fourth resistor are connected in series, the first end of the fourth resistor is electrically connected with the first end of the electromagnetic valve coil (2), and the bidirectional diode is electrically connected with the second end of the electromagnetic valve coil (2).
5. The low power consumption solenoid valve control circuit of claim 4, wherein: the power supply circuit (1) comprises a filtering unit (10) and a voltage stabilizing unit (11), wherein the filtering unit (10) is connected to two ends of the direct current power supply (8) in parallel, a first end part of the voltage stabilizing unit (11) is electrically connected with a second end part of the first resistor (4), a first end part of the voltage stabilizing unit (11) is electrically connected with a first end part of the first triode circuit (6) through a fifth resistor, and a second end part of the voltage stabilizing unit (11) is electrically connected with a negative electrode of the direct current power supply (8).
6. The low power consumption solenoid valve control circuit of claim 4, wherein: and two ends of the fourth resistor are connected with an indicator lamp in parallel.
7. A low power consumption solenoid valve control circuit according to any one of claims 1-3, wherein: and a reverse connection prevention diode is arranged between the connection part of the power circuit (1) and the first end part of the first resistor (4) and the positive electrode of the direct current power supply (8).
8. The low power consumption solenoid valve control circuit of claim 5, wherein: the filter unit (10) is a filter capacitor.
9. The low power consumption solenoid valve control circuit of claim 5, wherein: the voltage stabilizing unit (11) comprises a first capacitor and a voltage stabilizing diode which are arranged in parallel, the cathode of the voltage stabilizing diode is electrically connected with the second end part of the first resistor (4), and the two ends of the first capacitor are connected with a sixth resistor in parallel.
10. A low power consumption solenoid valve control circuit according to any one of claims 1-3, wherein: the controller (3) is a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591237.1U CN217634159U (en) | 2022-03-17 | 2022-03-17 | Low-power consumption electromagnetic valve control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220591237.1U CN217634159U (en) | 2022-03-17 | 2022-03-17 | Low-power consumption electromagnetic valve control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217634159U true CN217634159U (en) | 2022-10-21 |
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ID=83645287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220591237.1U Active CN217634159U (en) | 2022-03-17 | 2022-03-17 | Low-power consumption electromagnetic valve control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217634159U (en) |
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2022
- 2022-03-17 CN CN202220591237.1U patent/CN217634159U/en active Active
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