CN101290073A - Electromagnetic switch hydraulic multitandem valve control device - Google Patents
Electromagnetic switch hydraulic multitandem valve control device Download PDFInfo
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- CN101290073A CN101290073A CNA2008100232234A CN200810023223A CN101290073A CN 101290073 A CN101290073 A CN 101290073A CN A2008100232234 A CNA2008100232234 A CN A2008100232234A CN 200810023223 A CN200810023223 A CN 200810023223A CN 101290073 A CN101290073 A CN 101290073A
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- electromagnetic switch
- hydraulic multitandem
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Abstract
The invention relates an electromagnetic switch hydraulic multi-way valve control device based on the segmented current negative feedback principle, belonging to the hydraulic pressure control electric circuit field. The device mainly comprises a segmented electric current generating circuit, an electric current regulating circuit, a pulse-width modulation electric circuit, a power driving circuit and an electric current negative feedback electric circuit. Compared with the prior art, the invention adopts segmented current control which eliminates easy jam and lock phenomenon when an electromagnetic valve is just opened and guarantees the opening reliability; the invention makes power amplification electric circuit work in on-off state all the time by pulse-width modulating, which decreases heat productivity of electric circuit, is favorable for saving energy and enhances working stability; and the invention, by means of current negative feedback, eliminates oscillation of a valve core which effectively decreases the temperature of system oil, realizes energy conservation and increases operational stability of multi-way valves.
Description
Technical field
The present invention relates to a kind of control gear of electromagnetic switch hydraulic valve, especially a kind of electromagnetic switch hydraulic multitandem valve control device based on the segmented current negative-feedback principle belongs to the hydraulic control circuit technical field.
Background technique
Electromagnetic switch hydraulic multitandem valve is the base components of hydraulic transmission and control, is widely used in various walking hydraulic control systems (as various engineering machinery, engineering vehicle etc.).Respectively join electromagnetic switch valve, especially simply connected electromagnetic switch valve in traditional electromagnetic switch hydraulic multitandem valve owing to adopt switching circuit, have following problem for a long time as control gear
1, functional reliability, less stable;
Because the manufacturing machining accuracy reaches the influence to contamination level of oil liquid, the required stiction that overcomes is bigger during the electromagnetic switch hydraulic opening of valves, and the characteristic of switch electromagnet is: air gap is big when working when just opening, therefore the thrust of electromagnet is little, the result bite, stuck phenomenon occur when causing solenoid valve just to open easily, influences the reliability of system works; Solenoid valve open fully enter hold mode after, only need less electromagnetic push just can overcome the influence of active forces such as the power of surging, and this moment is little owing to the work of electromagnet air gap, and the electromagnetic push that is provided can not rationally utilize the electromagnetic performance of electromagnet much larger than the power of surging; In addition, because the fluctuation of supply voltage and the influence of other extraneous factor, the driving current of switch electromagnet is vulnerable to disturb, and also causes the instability of switch electromagnet thrust easily, influences the stability of system works.
2, the electromagnet power consumption is big, and heating is serious.
In existing electromagnetic switch hydraulic multitandem valve, each joins electromagnetic switch valve for bigger thrust is provided when the opening of valves, adopt the measure that improves driving current usually, and solenoid valve is at the driving current of opening, open fully, keep the identical size of employing under the operating mode.Because the electromagnetic switch hydraulic valve is being opened fully and kept under the operating mode the actual required driving current driving current when opening, the result causes the power consumption of solenoid valve big, and heating is serious, directly influences the working life of switch electromagnet.
Summary of the invention
The present invention wants the technical solution problem to be: at the shortcoming that above prior art exists, propose a kind of electromagnetic switch hydraulic multitandem valve control device that hydraulic multitandem valve functional reliability and stability and reduction electromagnet hear rate prolong its working life that helps to improve.
In order to solve above technical problem, electromagnetic switch hydraulic multitandem valve control device of the present invention comprises:
Segmented current generation circuit in order to when multi-way valve is opened, is exported big electric current, and after the multi-way valve unlatching was finished, electric current was kept in output;
Current regulating circuit is in order to export the electric current of segmented current generation circuit output and the feedback current stack back of negative-feedback circuit;
Pulse-width modulation circuit converts corresponding pulse-width signal in order to the current signal with current regulating circuit output;
Power driving circuit amplifies the electromagnet that hydraulic multitandem valve is controlled in back output in order to the pulse-width signal with pulse-width modulation circuit output;
Current negative feedback circuit feeds back to current regulating circuit in order to the loop current that will control the hydraulic multitandem valve electromagnet.
During work, segmented current generation circuit at first produces the required big electric current of electromagnet unlatching under the control of input signal, after the processing by subsequent conditioning circuit, drives the hydraulic multitandem valve electromagnet opening the moment generation than high thrust, makes its reliable breakdown action.Behind its complete opening, the generation of segmented current generation circuit is kept solenoid valve and is opened needed less electric current, therefore can reduce power consumption, reduces temperature rise, improves the working life of switch electromagnet.Simultaneously, the pulse-width modulation type power amplification makes power tube always work in saturation region or cut-off region, has further reduced power consumption, has not only improved efficient, also helps to have improved reliability.Current negative feedback circuit has then been eliminated the interference to the control electric current of supply voltage and other extraneous factor, the temperature rise of having avoided the spool vibration that therefore causes and hydraulic oil to be caused by stirring, thereby make control gear stable, and effectively suppressed the temperature rise of hydraulic oil.
Compared with prior art, the present invention adopts segmented current control, has eliminated solenoid valve easy bite, stuck phenomenon when just opening, and has guaranteed opening by property of unlatching; Utilize pulsewidth modulation to make power amplification circuit always work on off state, reduced the heating value of circuit, help energy saving, improve the stability of work; And eliminated the flutter of spool by Current Negative Three-Point Capacitance, and then reduced the temperature of system's fluid effectively, realized energy-conservationly, improved the multi-way valve functional reliability.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the circuit block diagram of one embodiment of the invention.
Fig. 2 is Fig. 1 embodiment's segmented current generation circuit theory diagrams.
Fig. 3 is Fig. 1 embodiment's a current regulating circuit schematic diagram.
Fig. 4 is Fig. 1 embodiment's a pulse-width modulation circuit schematic diagram.
Fig. 5 is Fig. 1 embodiment's a power driving circuit schematic diagram.
Fig. 6 is Fig. 1 embodiment's a current negative feedback circuit schematic diagram.
Embodiment
Embodiment one
The electromagnetic switch hydraulic multitandem valve control device of present embodiment mainly is made of segmented current generation circuit 2, current regulating circuit 3, pulse-width modulation circuit 4, power driving circuit 5, current negative feedback circuit 7 as shown in Figure 1.1 is control signal among the figure, the 6th, and the hydraulic multitandem valve electromagnet.
The basic annexation of above circuit is: segmented current generation circuit 2 receiving inputted signals 1, its output links to each other with the input of current regulating circuit device 3.Current regulating circuit 3 carries out the output signal of segmented current generation circuit 2 and the feedback signal of current negative feedback circuit 7 comprehensively to be transferred to the pulse-width modulation circuit 4 that is attached thereto.Pulse-width modulation circuit 4 converts the input signal that receives to associated pulse-width signal and exports to the power driving circuit 5 that is attached thereto.5 pairs of input signals of power driving circuit amplify 6 work of rear driving hydraulic multitandem valve electromagnet, and the loop current of hydraulic multitandem valve electromagnet feeds back to current regulating circuit device 3 through negative-feedback circuit 7 simultaneously.
Figure 2 shows that the segmented current generation circuit of present embodiment, power end VCC passes through first and second analog switching circuits in parallel after adder A3 output, two analog switching circuits are respectively by adjustable resistance R1, R2 is through voltage follower A1, meet analog switch device K1 behind the A2, K2 constitutes, wherein the control termination control signal of the analog switch device K1 in first analog switching circuit is imported I, the input of the control termination control signal of analog switch device K2 in second analog switching circuit connect control signal through with or door (requiring truth table is 1,0-1 1,1-00, output terminal 0-0).
Input voltage after the two adjustable resistance adjustment is imported analog switch behind voltage follower, control its break-make to adder by analog switch.The break-make of analog switch device K1 is directly controlled analog switch K1 conducting when this control signal is high level by the control signal of input.Analog switch 2 is same or gate control by the control signal warp.When the signal that requires the hydraulic multichannel opening of valves arrives, regulate the size of adjustable resistance R1, R2, can obtain the suitable pulse signal of width, the high level control analog switch K2 closure of this pulse signal, the two-way power supply acts on simultaneously, after first adder A1 addition, produce bigger electric current output.Through behind the needed time, analog switch K2 disconnects because of the control signal of importing becomes low level, and have only remaining one road power supply effect this moment, and output current diminishes, and realizes segmented current output control with this.
Current regulating circuit shown in Figure 3 is made of the second adder A4 that input end (being the inverting input of A4) connects segmented current generation circuit output end and current negative feedback circuit feedback end respectively, therefore can receive electric current from segmented current generation circuit and current negative feedback circuit, and to they summations, obtain the difference of two magnitude of current, again this difference is exported to follow-up pulse-width modulation circuit.
Figure 4 shows that the pulse-width modulation circuit of present embodiment, this circuit connects the output of current regulating circuit respectively by homophase and inverting input and the comparator A5 of triangle wave generating circuit constitutes, triangle wave generating circuit wherein is made up of two-level operating amplifier A6, A7 and capacitor C 4-1, resistance R 4-2, R4-4, behind the pyramidal wave input comparator A5 that this circuit produced, the input signal that produces with current regulating circuit is as reference voltage, through the corresponding pulse width modulated wave of signal that obtains after relatively producing with current regulating circuit.This pulse width modulated wave is transported to power driving circuit, can make the amplifying device in this circuit always work in saturation state or cut-off state, thereby reduce the heating of amplifying device, reduce the requirement of circuit heat radiation, reduce the circuit board volume, improve circuit stability.
Figure 5 shows that power driving circuit is made of the field effect as amplifying device.Usually the signal that obtains through pulsewidth modulation output is not enough to drive the hydraulic multitandem valve electromagnet, needs through amplifying.Amplification is mainly finished by field effect Q1 pipe in this circuit.Under the effect of pulse-width modulation circuit, field effect transistor is operated on off state always, can effectively reduce their heating value.
Figure 6 shows that current negative feedback circuit.This circuit meets the amplifier A8 that is connected on sampling resistor two ends in the hydraulic multitandem valve electromagnet loop respectively by homophase and inverting input and constitutes.After amplifying, the signal that this amplifier is returned sampling feeds back to circuit for signal conditioning.The resistance R 6-2 that regulates in this circuit can obtain different gains.Utilize Current Negative Three-Point Capacitance can shielded power supply voltage etc. the interference of extraneous factor, eliminate the flutter of electromagnetic valve core, stir the fluid temperature rise that causes thereby suppress spool.
Experimental results show that, the electromagnetic switch hydraulic multitandem valve control device of present embodiment can provide bigger electric current in the moment that multi-way valve is opened and produce bigger thrust so that play the electromagnet of on-off action, overcome switch electromagnetic valve in original technology and when just opening, cause bite, stuck disadvantage, the reliability when guaranteeing respectively to join the hydraulic multichannel opening of valves in the multi-way valve easily; Each connection hydraulic multitandem valve open fully enter hold mode after, provide lower, only keep the needed electric current of hydraulic multitandem valve hold mode, to reduce the power consumption of switch electromagnet, reduce temperature rise, thereby significantly improve the working life of switch electromagnet.
In addition to the implementation, the present invention can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (7)
1. electromagnetic switch hydraulic multitandem valve control device is characterized in that mainly being made up of following circuit:
Segmented current generation circuit in order to when multi-way valve is opened, is exported big electric current, and after the multi-way valve unlatching was finished, electric current was kept in output;
Current regulating circuit is in order to export the electric current of segmented current generation circuit output and the feedback current stack back of negative-feedback circuit;
Pulse-width modulation circuit converts corresponding pulse-width signal in order to the current signal with current regulating circuit output;
Power driving circuit amplifies the electromagnet that hydraulic multitandem valve is controlled in back output in order to the pulse-width signal with pulse-width modulation circuit output;
Current negative feedback circuit will be in order to will control hydraulic multitandem valve electromagnet earth-return currrent feedback to current regulating circuit.
2. according to the described electromagnetic switch hydraulic multitandem valve control device of claim 1, it is characterized in that: described segmented current generation circuit by power end by parallel connection first and second analog switching circuits after adder output constitute, described two analog switching circuits connect first and second analog switch devices by first and second adjustable resistances respectively and constitute behind first and second voltage followers, the input of the control termination control signal of first analog switch device in described first analog switching circuit, the control termination control signal input of second analog switch device in described second analog switching circuit connect control signal through with or the output terminal of door.
3. according to the described electromagnetic switch hydraulic multitandem valve control device of claim 2, it is characterized in that: described current regulating circuit is made of the second adder that input end connects segmented current generation circuit output end and current negative feedback circuit feedback end respectively.
4. according to the described electromagnetic switch hydraulic multitandem valve control device of claim 3, it is characterized in that: described pulse-width modulation circuit connects the output of current regulating circuit respectively by homophase and inverting input and the comparator of triangle wave generating circuit constitutes.
5. according to the described electromagnetic switch hydraulic multitandem valve control device of claim 4, it is characterized in that: described triangle wave generating circuit is made up of two-level operating amplifier and capacitance resistance ware.
6. according to the described electromagnetic switch hydraulic multitandem valve control device of claim 4, it is characterized in that: described power driving circuit is made of the field effect as amplifying device.
7. according to the described electromagnetic switch hydraulic multitandem valve control device of claim 6, it is characterized in that: described current negative feedback circuit connects the amplifier that is connected on sampling resistor two ends in the hydraulic multitandem valve electromagnet loop respectively by homophase and inverting input and constitutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100232234A CN101290073B (en) | 2008-04-02 | 2008-04-02 | Electromagnetic switch hydraulic multitandem valve control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100232234A CN101290073B (en) | 2008-04-02 | 2008-04-02 | Electromagnetic switch hydraulic multitandem valve control device |
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| CN101290073A true CN101290073A (en) | 2008-10-22 |
| CN101290073B CN101290073B (en) | 2010-07-07 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102893363A (en) * | 2010-02-08 | 2013-01-23 | 西门子公司 | Controlling circuit for an electromagnetic switching device |
| CN103321727A (en) * | 2012-03-21 | 2013-09-25 | 联创汽车电子有限公司 | Catalyst jetting and controlling circuit of automobile off-gas treating system |
| CN103713663A (en) * | 2012-10-01 | 2014-04-09 | 罗伯特·博世有限公司 | Method for triggering hydraulic valve device, and hydraulic valve device |
| CN105570491A (en) * | 2014-10-17 | 2016-05-11 | 徐工集团工程机械股份有限公司 | Load-sensitive multiway valve, load-sensitive system and excavator |
| CN104653758B (en) * | 2013-11-22 | 2017-03-15 | 上海汽车集团股份有限公司 | A kind of control method of vehicle hydraulic pressure system electromagnetic valve |
| CN111473020A (en) * | 2020-03-25 | 2020-07-31 | 科力远混合动力技术有限公司 | Method for evaluating flutter current parameters of electromagnetic valve of gearbox hydraulic system |
-
2008
- 2008-04-02 CN CN2008100232234A patent/CN101290073B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102893363A (en) * | 2010-02-08 | 2013-01-23 | 西门子公司 | Controlling circuit for an electromagnetic switching device |
| CN102893363B (en) * | 2010-02-08 | 2016-01-20 | 西门子公司 | For the control circuit of electromagentic switching apparatus |
| CN103321727A (en) * | 2012-03-21 | 2013-09-25 | 联创汽车电子有限公司 | Catalyst jetting and controlling circuit of automobile off-gas treating system |
| CN103321727B (en) * | 2012-03-21 | 2015-07-22 | 联创汽车电子有限公司 | Catalyst jetting and controlling circuit of automobile off-gas treating system |
| CN103713663A (en) * | 2012-10-01 | 2014-04-09 | 罗伯特·博世有限公司 | Method for triggering hydraulic valve device, and hydraulic valve device |
| CN104653758B (en) * | 2013-11-22 | 2017-03-15 | 上海汽车集团股份有限公司 | A kind of control method of vehicle hydraulic pressure system electromagnetic valve |
| CN105570491A (en) * | 2014-10-17 | 2016-05-11 | 徐工集团工程机械股份有限公司 | Load-sensitive multiway valve, load-sensitive system and excavator |
| CN105570491B (en) * | 2014-10-17 | 2018-03-06 | 徐工集团工程机械股份有限公司 | Load sensing multi-way valve, load sensitive system and excavator |
| CN111473020A (en) * | 2020-03-25 | 2020-07-31 | 科力远混合动力技术有限公司 | Method for evaluating flutter current parameters of electromagnetic valve of gearbox hydraulic system |
| CN111473020B (en) * | 2020-03-25 | 2022-03-18 | 科力远混合动力技术有限公司 | Method for evaluating flutter current parameters of electromagnetic valve of gearbox hydraulic system |
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| CN101290073B (en) | 2010-07-07 |
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