CN107781490A - Electromagnetic valve actuator - Google Patents
Electromagnetic valve actuator Download PDFInfo
- Publication number
- CN107781490A CN107781490A CN201710735200.5A CN201710735200A CN107781490A CN 107781490 A CN107781490 A CN 107781490A CN 201710735200 A CN201710735200 A CN 201710735200A CN 107781490 A CN107781490 A CN 107781490A
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- Prior art keywords
- solenoid coil
- switch element
- control
- circuit
- magnetic valve
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/064—Circuit arrangements for actuating electromagnets
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Electronic Switches (AREA)
Abstract
The present invention provides electromagnetic valve actuator.The electrical characteristics of constituent parts are not made to deteriorate, promptly absorb the surge electric power as caused by the counter electromotive force of solenoid coil.Possess：Whether the 1st switch element, switching control electric current flow to the solenoid coil of magnetic valve；Rectification circuit and surge absorbing circuit, are connected in series between the two-terminal of solenoid coil；2nd switch element, is connected in parallel between the two-terminal of surge absorbing circuit；Control circuit, control the switching of connection or the disconnection of the 1st switch element and the 2nd switch element.Control circuit has：1st control unit, connect the 1st switch element according to the driving instruction of magnetic valve and make after the valve element of magnetic valve is moved to the location of instruction, the connection or being switched into horizontal pulse width control system of disconnection to the 1st switch element and valve element is held in the location of instruction；2nd control unit, the 2nd switch element is correspondingly set to disconnect the scheduled period at the time of starting the pulse width control of the 1st switch element with the 1st control unit.
Description
Technical field
The present invention relates to the electromagnetic valve actuator of drive magnetic valve.
Background technology
If the electric power of the solenoid coil supply to magnetic valve is blocked, counter electromotive force is produced in solenoid coil, because
This, it is proposed that a kind of circuit that the surge absorbers such as variable resistor are set and absorb counter electromotive force (with reference to patent document 1).
Patent Document 1 discloses a kind of circuit, in the circuit, if electric current flows and magnetic valve to solenoid coil
Valve element be moved to desired position, then pulse width control is carried out to the grid voltage of transistor, will be to solenoid coil
The electric current of flowing suppresses into required Min., also, variable resistor is absorbed in counter electromotive force caused by solenoid coil,
Wherein, the transistor switches over control to whether electric current flows to solenoid coil.
Prior art literature
Patent document
Patent document 1：No. 4289745 publications of Japanese Patent Publication No.
The content of the invention
Problems to be solved by the invention
However, in the case where magnetic valve to be used for such as engine control, the switching of magnetic valve is continually carried out.Cause
And variable resistor must absorb the counter electromotive force of solenoid coil repeatedly, the electrical characteristics of variable resistor are possible in a short time
Deterioration.
The present invention makes to solve the problems, such as above-mentioned, and its object is to provide a kind of not make constituent parts
Electrical characteristics deterioration, the solenoid-driven dress that just can promptly absorb the surge electric power as caused by the counter electromotive force of solenoid coil
Put.
The solution used to solve the problem
It is above-mentioned in order to solve the problems, such as, in the scheme of the present invention, there is provided a kind of electromagnetic valve actuator, the magnetic valve
Drive device possesses：
1st switch element, to electric current, whether the solenoid coil flowing to magnetic valve switches over control for it；
Rectification circuit and surge absorbing circuit, it is connected in series between the two-terminal of the solenoid coil；
2nd switch element, it is connected in parallel between the two-terminal of the surge absorbing circuit；And
Control circuit, the switching of its connection or disconnection to the 1st switch element and the 2nd switch element are carried out
Control,
The control circuit has：
1st control unit, it carries out the 1st current control, in the 1st current control according to the driving instruction of the magnetic valve
In, the 1st switch element is continuously connected, in order that the valve element of the magnetic valve moves towards the location of instruction, make the 1st electricity
The solenoid coil flowing is flowed to, afterwards, carries out the 2nd current control, in the 2nd current control, makes the 1st switch member
Part intermittently connects, and 2nd electric current smaller than the 1st electric current is flowed to the solenoid coil；And
2nd control unit, it correspondingly makes the described 2nd to open at the time of terminating 1 current control with the 1st control unit
Close element and disconnect the scheduled period.
Can also be that the scheduled period is phase at the time of end with the 1st current control of the 1st switch element
Should be during ground starts, terminates at the time of the 2nd current control of the 1st switch element starts.
Can also be that the length of the scheduled period is set according to the electric current flowed to the solenoid coil.
Can also be inductance and the surge absorbing circuit of the length of the scheduled period based on the solenoid coil
The surge voltage that is absorbed and set.
Can also be that the surge absorbing circuit has Zener diode,
The breakdown voltage of inductance and the Zener diode of the length of the scheduled period based on the solenoid coil
And set.
Can also be that, if terminating during the driving instruction of the magnetic valve, the control circuit makes the 1st switch member
Part and the 2nd switch element disconnect and pass through electric current caused by the counter electromotive force as caused by the both ends of the solenoid coil
Flowed by the surge absorbing circuit and the rectification circuit.
Can also be that the magnetic valve is used for the switching of ship equipment.
Can also be, in another program of the present invention, there is provided a kind of electromagnetic valve actuator, the electromagnetic valve actuator
Possess：
1st switch element, its to whether make magnetic valve solenoid coil one end turn on the 1st reference voltage node into
Row switching control；
Diode and Zener diode, it is connected in series between one end of the solenoid coil and the other end；
2nd switch element, whether it is to making one end of the Zener diode and other end conducting switch over control；With
And
Control circuit, its connection or disconnection to the 1st switch element and the 2nd switch element switch over control
System,
The other end of one end of the diode and the solenoid coil is connected with the 2nd reference voltage node.
The effect of invention
According to the present invention, deteriorate not the electrical characteristics for making constituent parts, can promptly absorb by solenoid coil
Surge electric power caused by counter electromotive force.
Brief description of the drawings
Fig. 1 is the circuit diagram of the electromagnetic valve actuator of one embodiment of the present invention.
Fig. 2 schemes at the time of being Fig. 1 circuit.
Fig. 3 schemes at the time of being the circuit of a Fig. 1 comparative example.
Fig. 4 is the circuit diagram of an example of the installation form for the electromagnetic valve actuator for representing Fig. 1.
Description of reference numerals
1st, electromagnetic valve actuator；2nd, 1MOSFET；3rd, Zener diode；4th, fly-wheel diode (Japanese：Bring back to life ダ イ
オード)；5th, 2MOSFET；6th, control circuit；7~9, diode；10th, electric field capacitor.
Embodiment
Hereinafter, embodiments of the present invention are explained.Fig. 1 is the solenoid-driven dress of one embodiment of the present invention
Put 1 circuit diagram.Fig. 1 electromagnetic valve actuator 1 possesses 1MOSFET (the 1st switch element) 2, Zener diode (inhale by surge
Receive circuit) 3, fly-wheel diode (rectification circuit) 4,2MOSFET (the 2nd switch element) 5 and control circuit 6.
Magnetic valve can both be switched over to two positions, and 3 positions can also be switched over.Two positions are carried out
The magnetic valve of switching can be by whether make electric current be flowed to solenoid coil L to be switched over to two positions.To 3 positions
The magnetic valve switched over configures solenoid coil L in the both sides of valve body, can be by whether making electric current to each solenoid coil L
Flow to be switched over to 3 positions.Hereinafter, as an example, the solenoid-driven of the magnetic valve to driving two positions
Device 1 illustrates.Hereinafter, electric current will be made to be flowed to solenoid coil L and the valve element of magnetic valve is moved to the location of instruction
Instruction is referred to as driving instruction, and the switching position of magnetic valve now is referred to as into the 1st position, and electric current is not flowed to solenoid coil L
The switching position of magnetic valve in the case of dynamic is referred to as the 2nd position.
The magnetic valve of present embodiment is used for such as the engine control of ship.The electromagnetism of the engine control of ship
Valve needs continually to switch opened and closed positions.Therefore, in the present embodiment, the solenoid coil L of reduction magnetic valve electricity is considered
Can consumption and the deterioration of the electrical characteristics of the constituent parts of suppression electromagnetic valve actuator 1.
Fig. 1 1MOSFET2 is N-type MOSFET, but a part for the circuit structure by Altered Graphs 1, also can be by P
Type MOSFET is formed.1MOSFET2 connects when electric current flows to the solenoid coil L of magnetic valve.1MOSFET2 connection
Or the switching control disconnected is carried out by control circuit 6.If electric current flows to solenoid coil L, the valve element of magnetic valve starts court
Moved to the location of instruction.Afterwards, control circuit 6 makes 1MOSFET2 intervals before and after the valve element of magnetic valve reaches the location of instruction
Ground connects.More specifically, control circuit 6 starts mobile and reached before and after the location of instruction to the in the valve element of magnetic valve
Pulse width control is carried out during 1MOSFET2 connection.Thus, valve element is held in minimal needed for the location of instruction
Electric current is flowed to the solenoid coil L of magnetic valve, and the power consumption at solenoid coil L is suppressed.
Fig. 1 2MOSFET5 is N-type MOSFET, but a part for the circuit structure by Altered Graphs 1, also can be by P
Type MOSFET is formed.2MOSFET5 is substantially connected when magnetic valve is switched to the 1st position, by magnetic valve to the 2nd
Position disconnects when switching.In addition, 2MOSFET5 switches to intermittent communication action in 1MOSFET2 from continuous connection action
When disconnect the scheduled period.The switching control of 2MOSFET5 connection or disconnection is also carried out by control circuit 6.
Control circuit 6 has the 1st control unit 6a and the 2nd control unit 6b.1st control unit 6a is according to the drive finger of magnetic valve
Order, the 1st current control is carried out, in the 1st current control, making 1MOSFET2, continuously connection acts, in order that magnetic valve
Valve element is moved to the location of instruction, the 1st electric current is flowed to solenoid coil, afterwards, the 2nd current control is carried out, in the 2nd electric current
In control, act 1MOSFET2 intermittent communications and 2nd electric current smaller than the 1st electric current is flowed to solenoid coil.1st electricity
Flow control is also referred to as absorption current control, and the 2nd current control also referred to as keeps current control.
2nd control unit 6b correspondingly makes at the time of switching to 2 current control from the 1st current control with the 1st control unit 6a
2MOSFET5 disconnects the scheduled period.If 2MOSFET5 disconnects, in counter electromotive force caused by solenoid coil L to Zener two
Pole pipe 3 is flowed and counter electromotive force is rapidly absorbed.
Scheduled period is correspondingly opened with making 1MOSFET2 continuously connect at the time of the 1st current control acted terminates
During the 2nd current control for beginning and acting 1MOSFET2 intermittent communications correspondingly terminates at the time of beginning.Scheduled period
Length be set to, the electric current flowed in such as solenoid coil L is monitored and the electric current is turned into desired value.
Or the length of the scheduled time can also be based on solenoid coil L inductance and the surge voltage that is absorbed of Zener diode 3
(breakdown voltage) and set.
Zener diode 3 is connected in parallel between 2MOSFET5 Drain-Source.More specifically, Zener diode 3
Negative electrode be connected with 2MOSFET5 drain electrode, the anode of Zener diode 3 is connected with 2MOSFET5 source electrode.
Fly-wheel diode 4 and 2MOSFET5 is connected in series.More specifically, the anode of fly-wheel diode 4 and
2MOSFET5 source electrode connection, the negative electrode of fly-wheel diode 4 are connected with solenoid coil L one end.It is desirable that, the pole of afterflow two
Pipe 4 is the less fly-wheel diode of forward voltage, such as Schottky-barrier diode is suitable, but can also use other kinds
The diode of class.
The solenoid coil L of magnetic valve with by the fly-wheel diode 4 being connected in series and 2MOSFET5 drain electrode-source
The series circuit formed between pole is connected in parallel.Supplied to the cathode side of a solenoid coil L side and fly-wheel diode 4
Power source voltage Vcc.In addition, it is connected with 1MOSFET2 in solenoid coil L another side and 2MOSFET5 drain side
Drain electrode.In addition, as described later, can also by Zener diode 3 and fly-wheel diode 4 with it is in opposite direction in Fig. 1
Direction is connected to 2MOSFET5.I.e., can also be, the negative electrode and 2MOSFET5 of Zener diode 3 and fly-wheel diode 4
Drain electrode connection, one end of the anode-side and solenoid coil L of Zener diode 3 and fly-wheel diode 4, power source voltage Vcc node
Connection.
Fig. 2 schemes at the time of being Fig. 1 circuit.Figure 2 illustrates the driving instruction signal inputted to control circuit 6, control
The grid voltage Vb1 for the 1MOSFET2 that circuit 6 is exported, 2MOSFET5 grid voltage Vb2 and in solenoid coil
The electric current I flowed in L.
Fig. 3 is that the Zener diode that variable resistor carrys out alternate figures 1 is connected in parallel between solenoid coil L both ends
Scheme at the time of the circuit of 3 comparative example.
If for t1 driving instruction from disconnecting as connecting, control circuit 6 makes 1MOSFET2's at the time of Fig. 2 with Fig. 3
Grid voltage Vb1 turns into high potential and connects 1MOSFET2, and 2MOSFET5 grid voltage Vb2 is turned into high potential
And connect 2MOSFET5.Thus, electric current flows from supply voltage node Vcc via solenoid coil L and 1MOSFET2,
The valve element of magnetic valve moves initially towards the location of instruction.If turning into moment t2, before the valve element arrival location of instruction of magnetic valve
Afterwards.Therefore, control circuit 6 makes the in order that 1MOSFET2 switches to intermittent communication action from continuous connection action for the time being
1MOSFET2 and 2MOSFET5 disconnect.Thus, counter electromotive force is produced in solenoid coil L.Will turn into moment t2 it
Before, larger energy accumulation is in solenoid coil L, therefore, if disconnecting 1MOSFET2 in moment t2, in solenoid coil
L produces larger counter electromotive force.2MOSFET5 is to disconnect, and therefore, the counter electromotive force is via Zener diode 3 and afterflow two
Pole pipe 4 flows, and can promptly absorb the counter electromotive force.
Control circuit 6 disconnects 2MOSFET5 within the scheduled period from moment t2 to t3.As described above, the expected time of arrival
Between length be that the electric current flowed to such as solenoid coil L is monitored to determine.
If turning into moment t3,2MOSFET5 connections, after moment t3,1MOSFET2 starts intermittent communication and moved
Make.Thus, the low current for the degree valve element of magnetic valve being held in required for the location of instruction flows to solenoid coil L.
Afterwards, if switching to disconnection from connection in moment t4 driving instruction, control circuit 6 makes 1MOSFET2 and
2MOSFET5 disconnects.In a period of moment t3~t4,1MOSFET2 carries out intermittent communication action, therefore, to solenoid
The electric current of coil L flowings is also fewer than moment t1~t2, and the electric power accumulated in solenoid coil L is also small.Thus, even in moment t4
1MOSFET2 is disconnected, is not also had in counter electromotive force caused by solenoid coil L so big.In addition, in moment t4, make
2MOSFET5 disconnects, can be in short-term therefore, it is possible to the counter electromotive force as caused by absorbing in solenoid coil L Zener diode 3
It is interior to make to the electric current that solenoid coil L flows to be zero.
Afterwards, in moment t4, disconnected if driving instruction turns into from connection, control circuit 6 makes 1MOSFET2 grid
Voltage Vb1 turns into low potential and disconnects 1MOSFET2 and 2MOSFET5 grid voltage Vb2 is turned into low potential and is made
2MOSFET5 disconnects.
On the other hand, in the case of a Fig. 3 comparative example, only absorbed by solenoid coil L and fly-wheel diode 4 firm
1MOSFET2 is just set to switch to the anti-electricity of caused solenoid coil L after the connection action of interval from continuous connection action
Kinetic potential, therefore, the electric current flowed to solenoid coil L reduce and spend the time.The electric current flowed to solenoid coil L is reduced and spent
Time refers to solenoid coil L power consumption increase.
In addition, in the case of a Fig. 3 comparative example, possesses variable resistor to substitute Zener diode, therefore, at the moment
After t4, the counter electromotive force as caused by variable resistor absorption in solenoid coil L, in the feelings for the switching for continually carrying out magnetic valve
Under condition, the electrical characteristics of variable resistor just deteriorate.
Unpredictable driving instruction turns into from connection at the time of disconnect, but in the present embodiment, just makes the
1MOSFET2 makes 2MOSFET5 temporarily disconnect and makes Zener after the connection action of interval is switched to from continuous connection action
Diode 3 absorbs solenoid coil L counter electromotive force, therefore, switches driving instruction even in any instant afterwards, also can
It is zero promptly to make to the electric current that solenoid coil L flows.
Fig. 4 is the circuit diagram of an example of the installation form for the electromagnetic valve actuator 1 for representing Fig. 1.Fig. 4 circuit knot
Structure is different from Fig. 1 circuit structure on apparent, but basic action is identical.In Fig. 4 circuit, the court of Zener diode 3
To the direction with fly-wheel diode 4 with the direction in Fig. 1 on the contrary, there is no the difference on circuit operation in Fig. 1 and Fig. 4.Separately
Outside, in Fig. 4, the diagram of Fig. 1 control circuit 6 is eliminated.
Fig. 4 circuit is also equipped with electric field capacitor 10 and 3 diodes 7~9 in addition to Fig. 1 circuit.Diode 7
Be connected with supply voltage node Vcc, and for prevent to supply voltage node Vcc flow backwards purpose and set.Diode 7 uses
Such as the less Schottky-barrier diode of forward voltage, but other kinds of diode can also be used.
Electric field capacitor 10 is connected between the negative electrode of diode 7 and 1MOSFET2 source electrode, is played and is suppressed power supply electricity
Press the effect of Vcc variation.
In Fig. 4, the direction of electric current flowing is represented with arrow line y1~y3.If control circuit 6 makes 1MOSFET2 grid
Pole tension Vb1 turns into high potential, then as shown in arrow line y1, the electric current from supply voltage node Vcc is to 1MOSFET2's
Flowed between Drain-Source.
Control circuit 6 when intermittent communication action is switched to from 1MOSFET2 continuous connection action the
In a period of 1MOSFET2 and 2MOSFET5 disconnects, electric current caused by the counter electromotive force as caused by solenoid coil L is such as
Shown in arrow line y3, flowed via fly-wheel diode 4 and Zener diode 3.Afterwards, act 1MOSFET2 intermittent communications
In a period of, when 1MOSFET2 disconnects, as shown in arrow line y2, the electric current as caused by solenoid coil L counter electromotive force
Flowed via the transistor 5 of fly-wheel diode 4 and the 2nd.Afterwards, if driving instruction from connection turn into disconnect, 1MOSFET2 and
2MOSFET5 is disconnected, and electric current caused by the electromotive force as caused by solenoid coil L is passed through continuous with arrow line y3 path
Flow diode 4 and Zener diode 3 and absorbed.
In this way, in the present embodiment, using Zener diode 3 substituting the switching of opening and closing repeatedly due to magnetic valve and
Electrical characteristics are easy to the variable resistor of deterioration, and by whether making electric current switch over control to solenoid coil L flowings
1MOSFET2 makes in anti-electricity larger caused by solenoid coil L when switching to intermittent communication action from continuous connection action
Kinetic potential flows to Zener diode 3, therefore, it is possible to make to flow to solenoid coil L in 1MOSFET2 intermittent communication action
Dynamic electric current promptly reduces.Thereby, it is possible to make the switch speed high speed of magnetic valve.
In the above-described embodiment, to setting Zener diode 3 to be illustrated as the example of surge absorbing circuit,
But variable resistor can also be set to substitute Zener diode 3.Zener is substituted by setting for example larger variable resistor
Diode 3, the deterioration of the electrical characteristics of variable resistor can be suppressed.
The form of the present invention is not limited to above-mentioned each embodiment, also thinkable including those skilled in the art
Various modifications, effect of the invention are also not limited to above-mentioned content.I.e., do not departing from out of claims defined
Hold and its equivalent export come idea of the invention thought and purport in the range of can carry out various additions, change with
And part is deleted.
Claims (8)
1. a kind of electromagnetic valve actuator, it possesses：
1st switch element, to electric current, whether the solenoid coil flowing to magnetic valve switches over control for it；
Rectification circuit and surge absorbing circuit, it is connected in series between the two-terminal of the solenoid coil；
2nd switch element, it is connected in parallel between the two-terminal of the surge absorbing circuit；And
Control circuit, the switching of its connection or disconnection to the 1st switch element and the 2nd switch element are controlled
System,
The control circuit has：
1st control unit, it carries out the 1st current control, in the 1st current control, made according to the driving instruction of the magnetic valve
1st switch element continuously connects, in order that the valve element of the magnetic valve towards the location of instruction move, make the 1st electric current to
Solenoid coil flowing, afterwards, the 2nd current control is carried out, in the 2nd current control, made between the 1st switch element
Connect and 2nd electric current smaller than the 1st electric current is flowed to the solenoid coil with having a rest；And
2nd control unit, it correspondingly makes the 2nd switch member at the time of terminating 1 current control with the 1st control unit
Part disconnects the scheduled period.
2. electromagnetic valve actuator according to claim 1, wherein,
The scheduled period correspondingly starts at the time of being and terminate with the 1st current control of the 1st switch element, until
During the 2nd current control of 1st switch element terminates at the time of beginning.
3. electromagnetic valve actuator according to claim 1 or 2, wherein,
The length of the scheduled period is set according to the electric current flowed to the solenoid coil.
4. electromagnetic valve actuator according to claim 1 or 2, wherein,
The surge that inductance and the surge absorbing circuit of the length of the scheduled period based on the solenoid coil are absorbed
Voltage and set.
5. electromagnetic valve actuator according to claim 4, wherein,
The surge absorbing circuit has Zener diode,
The breakdown voltage of inductance and the Zener diode of the length of the scheduled period based on the solenoid coil and set
It is fixed.
6. according to electromagnetic valve actuator according to any one of claims 1 to 5, wherein,
If terminating during the driving instruction of the magnetic valve, the control circuit opens the 1st switch element and the described 2nd
Element is closed to disconnect and electric current caused by the counter electromotive force as caused by the both ends of the solenoid coil is inhaled via the surge
Receive circuit and rectification circuit flowing.
7. according to electromagnetic valve actuator according to any one of claims 1 to 6, wherein,
The magnetic valve is used for the switching of ship equipment.
8. a kind of electromagnetic valve actuator, it possesses：
1st switch element, whether it is to making one end of solenoid coil of magnetic valve turn on and cut with the 1st reference voltage node
Change control；
Diode and Zener diode, it is connected in series between one end of the solenoid coil and the other end；
2nd switch element, whether it is to making one end of the Zener diode and other end conducting switch over control；And
Control circuit, its connection or disconnection to the 1st switch element and the 2nd switch element switch over control,
The other end of one end of the diode and the solenoid coil is connected with the 2nd reference voltage node.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016165922A JP2018032819A (en) | 2016-08-26 | 2016-08-26 | Electromagnetic valve driver |
| JP2016-165922 | 2016-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107781490A true CN107781490A (en) | 2018-03-09 |
| CN107781490B CN107781490B (en) | 2020-02-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710735200.5A Active CN107781490B (en) | 2016-08-26 | 2017-08-24 | Solenoid valve driving device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2018032819A (en) |
| KR (1) | KR101892398B1 (en) |
| CN (1) | CN107781490B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018215432A1 (en) * | 2018-09-11 | 2020-03-12 | Continental Teves Ag & Co. Ohg | Method for regulating the speed or torque of an engine, speed control system and control unit |
| JP6855558B2 (en) | 2018-12-26 | 2021-04-07 | 川崎重工業株式会社 | Controls for non-excited electromagnetic brakes, multi-brake systems, robots, and medical robot systems |
| CN110071491B (en) * | 2019-04-04 | 2021-06-29 | 苏州汇川技术有限公司 | Load tail current eliminating circuit |
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- 2017-08-24 CN CN201710735200.5A patent/CN107781490B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101892398B1 (en) | 2018-08-27 |
| JP2018032819A (en) | 2018-03-01 |
| KR20180023839A (en) | 2018-03-07 |
| CN107781490B (en) | 2020-02-07 |
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