CN114321482A - Short-circuit protection circuit for water supply electromagnetic valve and electromagnetic valve control device - Google Patents
Short-circuit protection circuit for water supply electromagnetic valve and electromagnetic valve control device Download PDFInfo
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- CN114321482A CN114321482A CN202111395930.8A CN202111395930A CN114321482A CN 114321482 A CN114321482 A CN 114321482A CN 202111395930 A CN202111395930 A CN 202111395930A CN 114321482 A CN114321482 A CN 114321482A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims description 18
- 230000004913 activation Effects 0.000 claims 1
- 230000006870 function Effects 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000006386 memory function Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001006 Constantan Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 230000005855 radiation Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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Abstract
The invention belongs to the field of direct current solenoid valve circuit control, and provides a short-circuit protection circuit of a water supply solenoid valve, which comprises the following components: the key setting circuit comprises a key setting circuit, a singlechip control unit, a driving circuit and a current detection circuit; the current detection circuit is used for detecting a real current value when the electromagnetic valve is started and a working current after the electromagnetic valve is started; the single chip microcomputer control unit is used for judging whether the working current of the electromagnetic valve during starting exceeds a first current threshold value or not according to the first current threshold value of the electromagnetic valve, if so, controlling the driving circuit to close the electromagnetic valve, and otherwise, controlling the driving circuit to open the electromagnetic valve; after the electromagnetic valve is started, the single-chip microcomputer control unit records the maximum current value of the electromagnetic valve in the working process of the electromagnetic valve through self-learning, judges whether the working current of the electromagnetic valve after the electromagnetic valve is started exceeds a second current threshold value of the electromagnetic valve, and controls the driving circuit to close the electromagnetic valve if the working current of the electromagnetic valve exceeds the second current threshold value. The short-circuit protection function and the service life prolonging function of the electromagnetic valve are achieved.
Description
Technical Field
The invention belongs to the field of direct current solenoid valve circuit control, and particularly relates to a short-circuit protection circuit of a water supply solenoid valve and a solenoid valve control device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, in a control circuit for direct current electromagnetic water supply, a water supply control system mainly starts an electromagnetic valve when detecting that the whole system needs water supply, and closes the electromagnetic valve when the condition is not met. When the electromagnetic valve is over-current or is overheated due to over-current, the electromagnetic valve is easy to damage, even leads to spontaneous combustion of a power line on the electromagnetic valve, and causes unnecessary economic loss.
The water feeding of the electromagnetic valve in the prior art has the following technical problems:
(1) for controlling water feeding by an alternating current electromagnetic valve, when the alternating current electromagnetic valve is clamped in a closed or semi-closed state, the inductance of a coil is very low, the inductive reactance is also low, and the electromagnetic valve is burnt out due to overheating when current passes through the coil too much;
(2) the control of solenoid valve water-feeding uses the relay to realize usually, and in the course of the work, the relay also has the defect, and switching speed is not fast, and the actuation metal contact can produce heavy current in the twinkling of an eye, generates heat, externally produces radiation interference, and the electric shock life-span also can decay, can the adhesion, and relevant phenomenon such as constantly exists.
Disclosure of Invention
In order to solve at least one technical problem in the background art, a first aspect of the present invention provides a short-circuit protection circuit for a water supply solenoid valve, which can set a maximum current of the solenoid valve during operation and display an operation state of the solenoid valve in real time, wherein once a set current value is reached or a maximum current value of the solenoid valve is obtained through a self-learning function of a controller during a water supply process of the solenoid valve, the controller starts protection of the solenoid valve to limit a start current of the solenoid valve, thereby performing a short-circuit protection function of the solenoid valve and prolonging a service life of the solenoid valve.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a short-circuit protection circuit of a water supply electromagnetic valve in a first aspect, which comprises: the key setting circuit comprises a key setting circuit, a singlechip control unit, a driving circuit and a current detection circuit;
the single chip microcomputer control unit is connected with a key setting circuit, and the key setting circuit is used for starting the electromagnetic valve water supply and setting a first current threshold and a second current threshold of the electromagnetic valve;
one end of the driving circuit is connected with the single chip microcomputer control unit, the other end of the driving circuit is connected with the current detection circuit, and the current detection circuit is used for detecting a working current value when the electromagnetic valve is started and a working current after the electromagnetic valve is started;
the single chip microcomputer control unit is used for judging whether the working current of the electromagnetic valve during starting exceeds a first current threshold value or not according to the first current threshold value of the electromagnetic valve, if so, controlling the driving circuit to close the electromagnetic valve, and otherwise, controlling the driving circuit to open the electromagnetic valve;
after the electromagnetic valve is started, the single-chip microcomputer control unit records the maximum current value of the electromagnetic valve in the working process of the electromagnetic valve through self-learning, judges whether the working current of the electromagnetic valve after the electromagnetic valve is started exceeds a second current threshold value of the electromagnetic valve, and controls the driving circuit to close the electromagnetic valve if the working current of the electromagnetic valve exceeds the second current threshold value.
In one embodiment, the solenoid valve is a dc solenoid valve.
As an implementation manner, the single chip microcomputer control unit sets the starting threshold current of the electromagnetic valve by collecting the number of times of touching and the frequency of the key.
As an implementation mode, the driving circuit comprises a current-limiting resistor, a switch tube, a freewheeling diode and a voltage VCC, one end of the current-limiting resistor is connected with the single chip microcomputer control unit, the other end of the current-limiting resistor is connected with a first pin of the switch tube, a second pin of the switch tube and one end of the freewheeling diode are connected with the voltage VCC, and a third pin of the switch tube and the other end of the freewheeling diode are connected with the current detection circuit.
As an embodiment, the process of controlling the driving circuit to open the solenoid valve by the single chip microcomputer control unit is as follows:
the singlechip control unit is used for transmitting a high-level signal to the switching tube through the first current-limiting resistor, so that the voltage of the second pin of the switching tube is transmitted to the third pin of the switching tube, the voltage VCC acts on the electromagnetic valve, and the electromagnetic valve is controlled to be opened.
As an embodiment, the process of controlling the driving circuit to close the electromagnetic valve by the single chip microcomputer control unit is as follows:
the singlechip control unit is used for giving a low-level signal to the switching tube through the first current-limiting resistor, the voltage of a third pin of the switching tube is low, no voltage difference exists at two ends of the electromagnetic valve, and the electromagnetic valve is in a closed state.
As an implementation mode, the current detection circuit includes a second current-limiting resistor and a sampling resistor, one end of the second current-limiting resistor is connected with the single chip microcomputer control unit, the other end of the second current-limiting resistor and the sampling resistor are connected to a third pin of the switching tube, and the sampling resistor and the electromagnetic valve are connected in parallel.
As an embodiment, the self-learning process of the mcu includes: after the electromagnetic valve is opened, the single chip microcomputer control unit is used for detecting the working current of the electromagnetic valve in real time, converting the working current of the electromagnetic valve into the working voltage of the electromagnetic valve, and storing the recorded maximum voltage value, minimum voltage value and average value of the electromagnetic valve in working into the single chip microcomputer control unit.
As an implementation manner, the protection circuit further includes a data display unit, and the data display unit is configured to display a current value when the solenoid valve is started and a current threshold value set by the key setting circuit.
A second aspect of the present invention provides a solenoid valve control device including any one of the above-described upper solenoid valve short-circuit protection circuits.
The invention has the beneficial effects that:
(1) the invention can set the maximum current of the solenoid valve, can display the running state of the solenoid valve in real time, and once the solenoid valve reaches the set current value or obtains the maximum current value of the solenoid valve through the self-learning function of the controller in the water feeding process of the solenoid valve, the controller starts the protection of the solenoid valve, limits the starting current of the solenoid valve, and plays the functions of short-circuit protection and service life prolonging of the solenoid valve.
(2) The direct-current electromagnetic valve is adopted, so that the problem that when the alternating-current electromagnetic valve is clamped in a closed or semi-closed state, the inductance of a coil is very low, the inductive reactance is low, and the electromagnetic valve is burnt out due to overheating when current passes through the coil too much is effectively solved.
(3) The invention changes the traditional relay control into the switch tube control for controlling the water supply of the electromagnetic valve, thereby effectively avoiding the problems that the switching speed is not fast and the metal contact can generate large current and generate heat at the moment of attracting. The range that drive circuit's switch tube can be selected is wider, and then satisfies different solenoid valve work, reduces the damage of switch tube, prolongs the life of solenoid valve.
(4) The current threshold value and the set current protection value of the electromagnetic valve can be set at will, different working requirements of the electromagnetic valve are met, the working current of the electromagnetic valve can be displayed and fed back simply and directly.
(5) The invention has the advantages that the set parameters have the memory function, the power failure is not lost, and the trouble of setting the current threshold value for the second time is avoided when the same electromagnetic valve works.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of the overall structure of a short-circuit protection circuit of an upper electromagnetic valve.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "connected" and "connecting" should be interpreted broadly, and mean either a fixed connection or an integral connection or a detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a short-circuit protection circuit for a water supply electromagnetic valve, which includes a key setting circuit 1, a power supply unit 2, a single-chip microcomputer control unit 3, a driving circuit 4, a current detection circuit 5, a data display unit 6 and an electromagnetic valve;
the single chip microcomputer control unit 3 is connected with the key setting circuit 1, the key setting circuit 1 is used for starting, testing water feeding of the electromagnetic valve and setting a current threshold of the electromagnetic valve, and the current threshold of the electromagnetic valve can be automatically calculated and determined through the single chip microcomputer;
one end of the driving circuit 4 is connected with the singlechip control unit 3, the other end of the driving circuit is connected with the current detection circuit 5, and the current detection circuit 5 is used for detecting a real current value when the electromagnetic valve is started and a working current after the electromagnetic valve is started;
the single chip microcomputer control unit 3 is used for automatically determining a current threshold of the electromagnetic valve according to a real current value when the electromagnetic valve is started, and also can judge whether a working current exceeds a threshold current after the electromagnetic valve is started according to the real current value when the electromagnetic valve is started and the current threshold of the electromagnetic valve, if so, the driving circuit 4 is controlled to close the electromagnetic valve, otherwise, the driving circuit 4 is controlled to normally work;
after the electromagnetic valve is started, the single-chip microcomputer control unit 3 records the maximum current value of the electromagnetic valve in the working process of the electromagnetic valve through self-learning, and is used for judging whether the working current after the electromagnetic valve is started exceeds the current threshold of the electromagnetic valve or not, and if the working current exceeds the current threshold, the driving circuit 4 is controlled to close the electromagnetic valve.
The key setting circuit 1 comprises a pull-up resistor R1, a first light touch switch K1 and a filter capacitor C1, one end of the pull-up resistor R1 is connected with a power supply, the other end of the pull-up resistor R1 is connected with the light touch switch K1, and the first light touch switch K1 is connected with the filter capacitor C1 in parallel.
The key setting circuit 1 is used for starting, testing the water supply of the electromagnetic valve and setting the current threshold of the electromagnetic valve.
The current threshold value and the set current protection value of the electromagnetic valve can be set at will, different working requirements of the electromagnetic valve are met, the working current of the electromagnetic valve can be displayed and fed back simply and directly.
The power supply unit 2 adopts a switching power supply circuit to provide power supply and output voltage for the whole protection circuit.
It should be noted that the range of the voltage value output by the power supply unit is: 0-36 VDC.
Singlechip control unit 3 is connected to drive circuit 4's one end, and current detection circuit 5 is connected to the other end, drive circuit 4 includes current-limiting resistor R2, switch tube Q1, freewheel diode D1 and voltage VCC, current-limiting resistor R2 one end links to each other with singlechip control unit 3, and the other end links to each other with switch tube Q1's first pin, switch tube Q1's second pin and freewheel diode D1 one end are connected in voltage VCC, switch tube Q1's third pin and freewheel diode D1's the other end are connected in current detection circuit 5.
It is understood that in other embodiments, the type of the switching tube Q1 may be set by a person skilled in the art according to specific operating conditions, and mainly includes a transistor, a MOS transistor, an IGBT, and the like, when a transistor is used, a freewheeling diode D1 must be optionally configured, and other switching tubes may not use the freewheeling diode D1.
As a specific embodiment, the present embodiment takes the example that the switching transistor Q1 is a triode:
the triode comprises a base electrode, a collector electrode and an emitting electrode, one end of the current-limiting resistor R2 is connected with the single chip microcomputer, the other end of the current-limiting resistor R2 is connected with the base electrode, the collector electrode of the triode and one end of the fly-wheel diode are connected with a voltage VCC, and the emitting electrode of the triode is connected with the other end of the fly-wheel diode.
The range that drive circuit's switch tube can be selected is wider, and then satisfies different solenoid valve work, reduces the damage of switch tube, prolongs the life of solenoid valve.
The single chip microcomputer is used for controlling the driving circuit to start or close the electromagnetic valve, and the specific control process is as follows:
the single-chip microcomputer control unit 3 is used for giving a high level signal to the switching tube Q1 through the current limiting resistor R2, enabling the voltage of the collector of the switching tube Q1 to reach the emitter of the switching tube Q1 through the PN junction, enabling the voltage VCC to act on the electromagnetic valve, and controlling the opening of the electromagnetic valve, and if the single-chip microcomputer control unit 3 gives a low level signal to the switching tube Q1 through the resistor R2, the voltage of the emitter of the switching tube Q1 is low, no voltage difference exists between two ends of the electromagnetic valve, and the electromagnetic valve is in a closed state.
The current detection circuit 5 comprises a current-limiting resistor R3 and a sampling resistor R4, one end of the current-limiting resistor R3 is connected with the single-chip microcomputer control unit, the other end of the current-limiting resistor R3526 is connected with a third pin of the switching tube Q1 through the sampling resistor R4, and the sampling resistor R4 is connected with the electromagnetic valve in parallel.
The single chip microcomputer unit comprises a current collecting circuit, the current collecting circuit can adopt an AD sampling circuit, one or more of the current limiting resistor R3 and the sampling resistor R4 are connected with the AD sampling circuit in series, and the AD sampling circuit is used for sampling and detecting a current value when the electromagnetic valve is started and a working current after the electromagnetic valve is started.
The current value when the electromagnetic valve is started is obtained through an AD sampling value and a proportional value in the single chip microcomputer control part 3.
The self-learning process of the single chip microcomputer control unit comprises the following steps: after the electromagnetic valve is opened, the single-chip microcomputer control unit is used for detecting the working current of the electromagnetic valve in real time, converting the working current of the electromagnetic valve into the working voltage of the electromagnetic valve, and storing the recorded maximum voltage value, minimum voltage value and average value of the electromagnetic valve in the working process into an EEPROM of the control unit.
When the electromagnetic valve is in short circuit, if the voltage on the sampling resistor R4 is larger than a certain time coefficient of the maximum voltage value of the normal work of the electromagnetic valve, and the action time is larger than the set short-circuit protection time, the single chip microcomputer control unit closes the switch tube Q1, the electromagnetic valve is powered off, and then the short circuit of the electromagnetic valve is protected.
It should be noted that the sampling resistor R4 can be made of constantan wire or a high-power precision resistor, and the sampling resistor R4 can be made of a plurality of resistors connected in parallel depending on power.
The electromagnetic valve is a direct current electromagnetic valve, when the alternating current electromagnetic valve is clamped in a closed or semi-closed state, the inductance of the coil is very low, the inductive reactance is low, and the electromagnetic valve is overheated and burnt out if the current passes through the electromagnetic valve too much.
The data display unit 6 is used for displaying the current threshold value set by the key setting circuit 1, and can also display the current value when the electromagnetic valve is started in real time.
It should be noted that the single chip microcomputer control unit can be selected according to actual conditions, for example, a logic control circuit mainly based on the single chip microcomputer, or a single chip microcomputer with 8 bits, 16 bits, 32 bits or higher can be selected, and a single chip microcomputer control system is formed by the single chip microcomputer control unit and peripheral digital-to-analog circuits.
It should be noted that, in this embodiment, the model of the data display unit 6 may be set by a person skilled in the art according to specific working conditions, and may be LCD display, VFD display, LED display, and the like, which are not described in detail herein.
The invention effectively protects the electromagnetic valve, and the current of the invention can be set at will because of burning out the fire which can not work or even causes because of overheating and overcurrent when water is supplied, once the current is set, the circuit has the memory function, records the current value each time, once the current value exceeds the set current value, the output control circuit acts to limit the output current and the voltage of the drive circuit, and limits the starting of the electromagnetic valve, thereby playing the role of short-circuit protection.
The single chip microcomputer control system 3 is used for comparing the actual current of the electromagnetic valve during working with a preset current threshold, and when the actual current is higher than the threshold current of the electromagnetic valve, the output of the electromagnetic valve is turned off, so that the electromagnetic protection is formed, and the greater economic loss caused by fire is avoided.
Example 2
The embodiment provides a solenoid valve control device, which comprises the short-circuit protection circuit of the water supply solenoid valve in embodiment 1.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A water supply solenoid valve short-circuit protection circuit, characterized by comprising: the key setting circuit comprises a key setting circuit, a singlechip control unit, a driving circuit and a current detection circuit;
the single chip microcomputer control unit is connected with a key setting circuit, and the key setting circuit is used for starting the electromagnetic valve water supply and setting a first current threshold and a second current threshold of the electromagnetic valve;
one end of the driving circuit is connected with the single chip microcomputer control unit, the other end of the driving circuit is connected with the current detection circuit, and the current detection circuit is used for detecting a working current value when the electromagnetic valve is started and a working current after the electromagnetic valve is started;
the single chip microcomputer control unit is used for judging whether the working current of the electromagnetic valve during starting exceeds a first current threshold value or not according to the first current threshold value of the electromagnetic valve, if so, controlling the driving circuit to close the electromagnetic valve, and otherwise, controlling the driving circuit to open the electromagnetic valve;
after the electromagnetic valve is started, the single-chip microcomputer control unit records the maximum current value of the electromagnetic valve in the working process of the electromagnetic valve through self-learning, judges whether the working current of the electromagnetic valve after the electromagnetic valve is started exceeds a second current threshold value of the electromagnetic valve, and controls the driving circuit to close the electromagnetic valve if the working current of the electromagnetic valve exceeds the second current threshold value.
2. The short-circuit protection circuit for the water supply electromagnetic valve as claimed in claim 1, wherein the electromagnetic valve is a direct current electromagnetic valve.
3. The short-circuit protection circuit of the water supply electromagnetic valve as claimed in claim 1, wherein the single-chip microcomputer control unit sets the first threshold current of the electromagnetic valve by collecting the number of times of activation and the frequency of the key.
4. The short-circuit protection circuit of the water supply electromagnetic valve as claimed in claim 1, wherein the driving circuit comprises a current-limiting resistor, a switch tube, a freewheeling diode and a voltage VCC, one end of the current-limiting resistor is connected with the single chip microcomputer control unit, the other end of the current-limiting resistor is connected with the first pin of the switch tube, the second pin of the switch tube and one end of the freewheeling diode are connected with the voltage VCC, and the third pin of the switch tube and one other end of the freewheeling diode are connected with the current detection circuit.
5. The short-circuit protection circuit of the water supply electromagnetic valve as claimed in claim 1, wherein the process of controlling the drive circuit to open the electromagnetic valve by the single-chip microcomputer control unit is as follows:
the singlechip control unit is used for transmitting a high-level signal to the switching tube through the first current-limiting resistor, so that the voltage of the second pin of the switching tube is transmitted to the third pin of the switching tube, the voltage VCC acts on the electromagnetic valve, and the electromagnetic valve is controlled to be opened.
6. The short-circuit protection circuit of the water supply electromagnetic valve as claimed in claim 1, wherein the process of controlling the drive circuit to close the electromagnetic valve by the single-chip microcomputer control unit is as follows:
the singlechip control unit is used for giving a low-level signal to the switching tube through the first current-limiting resistor, the voltage of a third pin of the switching tube is low, no voltage difference exists at two ends of the electromagnetic valve, and the electromagnetic valve is in a closed state.
7. The short-circuit protection circuit of the water supply electromagnetic valve as claimed in claim 1, wherein the current detection circuit comprises a second current limiting resistor and a sampling resistor, one end of the second current limiting resistor is connected with the single chip microcomputer control unit, the other end of the second current limiting resistor and the sampling resistor are connected to a third pin of the switch tube, and the sampling resistor and the electromagnetic valve are connected in parallel.
8. The upper solenoid valve short-circuit protection circuit as claimed in claim 1, wherein the self-learning process of the single-chip microcomputer control unit comprises the following steps: after the electromagnetic valve is opened, the single chip microcomputer control unit is used for detecting the working current of the electromagnetic valve in real time, converting the working current of the electromagnetic valve into the working voltage of the electromagnetic valve, and storing the recorded maximum voltage value, minimum voltage value and average value of the electromagnetic valve in working into the single chip microcomputer control unit.
9. The short-circuit protection circuit for the water supply electromagnetic valve according to claim 1, further comprising a data display unit for displaying the current value when the electromagnetic valve is started and the first current threshold value and the second current threshold value set by the key setting circuit.
10. A solenoid valve control device comprising a water supply solenoid valve short circuit protection circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111395930.8A CN114321482A (en) | 2021-11-23 | 2021-11-23 | Short-circuit protection circuit for water supply electromagnetic valve and electromagnetic valve control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111395930.8A CN114321482A (en) | 2021-11-23 | 2021-11-23 | Short-circuit protection circuit for water supply electromagnetic valve and electromagnetic valve control device |
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| CN114321482A true CN114321482A (en) | 2022-04-12 |
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| CN202111395930.8A Pending CN114321482A (en) | 2021-11-23 | 2021-11-23 | Short-circuit protection circuit for water supply electromagnetic valve and electromagnetic valve control device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050046422A (en) * | 2003-11-14 | 2005-05-18 | 주식회사 만도 | A protect apparatus and method of solenoid valve |
| CN101975301A (en) * | 2010-09-30 | 2011-02-16 | 北京理工大学 | FPGA-based solenoid valve driving module |
| JP2011202753A (en) * | 2010-03-26 | 2011-10-13 | Aisin Aw Co Ltd | Control device for solenoid valve |
| CN205375020U (en) * | 2016-01-19 | 2016-07-06 | 湖南机电职业技术学院 | Automatic switched systems of bi -motor overload |
| CN209800830U (en) * | 2019-04-04 | 2019-12-17 | 广东嘉腾机器人自动化有限公司 | Electromagnetic drive circuit and electronic equipment |
| CN111379893A (en) * | 2020-03-20 | 2020-07-07 | 青岛中加特电气股份有限公司 | Device for controlling electromagnetic valve |
-
2021
- 2021-11-23 CN CN202111395930.8A patent/CN114321482A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050046422A (en) * | 2003-11-14 | 2005-05-18 | 주식회사 만도 | A protect apparatus and method of solenoid valve |
| JP2011202753A (en) * | 2010-03-26 | 2011-10-13 | Aisin Aw Co Ltd | Control device for solenoid valve |
| CN101975301A (en) * | 2010-09-30 | 2011-02-16 | 北京理工大学 | FPGA-based solenoid valve driving module |
| CN205375020U (en) * | 2016-01-19 | 2016-07-06 | 湖南机电职业技术学院 | Automatic switched systems of bi -motor overload |
| CN209800830U (en) * | 2019-04-04 | 2019-12-17 | 广东嘉腾机器人自动化有限公司 | Electromagnetic drive circuit and electronic equipment |
| CN111379893A (en) * | 2020-03-20 | 2020-07-07 | 青岛中加特电气股份有限公司 | Device for controlling electromagnetic valve |
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