CN204290892U - A kind of electrohydraulic proportional am-plifier - Google Patents
A kind of electrohydraulic proportional am-plifier Download PDFInfo
- Publication number
- CN204290892U CN204290892U CN201420719295.3U CN201420719295U CN204290892U CN 204290892 U CN204290892 U CN 204290892U CN 201420719295 U CN201420719295 U CN 201420719295U CN 204290892 U CN204290892 U CN 204290892U
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- controller
- proportional
- electrohydraulic proportional
- plifier
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Abstract
The utility model discloses a kind of electrohydraulic proportional am-plifier, comprise connect successively controller, proportional amplifier, electro-hydraulic proportional valve, actuator and load, detection feedback circuit is connected with between described controller and described load, described controller is electrohydraulic proportional controller, the fly-wheel diode that described electrohydraulic proportional controller comprises power tube and is connected in series with described power tube, described fly-wheel diode is connected in parallel to the branch road by inductance coil and resistant series.The electrohydraulic proportional am-plifier provided that the utility model provides, what it adopted is digital, controls (pulse width modulation), by the working state control of power tube on off state by PWM, power consumption greatly reduces, and without the need to separately adding vibrating signal, antijamming capability is strong, and lag time is short, repeatable accuracy is high, parameter adjustment can set in advance, and without the need to manual adjustment, efficiency has and improves greatly.
Description
Technical field
The utility model relates to a kind of electrohydraulic proportional am-plifier.
Background technology
Proportional amplifier is that one is used for comparative example electromagnet and provides particular characteristic electric current, and carries out the electronic installation of open loop or closed-loop control to electro-hydraulic proportional valve or electro-hydraulic proportional control system, and it is the important component part of electrical-liquid control element or system.The performance of electromechanical converter and the overall performance of electro-hydraulic servo/proportioning valve are closely related, improve the performance index of electro-hydraulic servo/proportioning valve, the driving force of electromechanical converter will be improved to a great extent exactly, currently used proportional amplifier is analog, the exportable continuous current of analog proportional amplifier, power tube is operated in linear zone, power consumption is large, temperature rise, efficiency are lower, and the parameter adjustment of each proportional amplifier, need potentiometer on Circuit tuning plate, workload is large.
Prior art is compared, and the beneficial effects of the utility model are as follows: the electrohydraulic proportional am-plifier provided that the utility model provides, and what it adopted is digital, (pulse width modulation) is controlled by PWM, by the working state control of power tube on off state, power consumption greatly reduces, and without the need to separately adding vibrating signal, antijamming capability is strong, lag time is short, and repeatable accuracy is high, and parameter adjustment can set in advance, without the need to manual adjustment, efficiency has and improves greatly.
Utility model content
The purpose of this utility model is to solve the problem mentioned in above-mentioned background technology, and provide a kind of electrohydraulic proportional am-plifier, what it adopted is digital, (pulse width modulation) is controlled by PWM, by the working state control of power tube on off state, power consumption greatly reduces, and without the need to separately adding vibrating signal, antijamming capability is strong, lag time is short, and repeatable accuracy is high, and parameter adjustment can set in advance, without the need to manual adjustment, efficiency has and improves greatly.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of electrohydraulic proportional am-plifier, comprise connect successively controller, proportional amplifier, electro-hydraulic proportional valve, actuator and load, detection feedback circuit is connected with between described controller and described load, described controller is electrohydraulic proportional controller, the fly-wheel diode that described electrohydraulic proportional controller comprises power tube and is connected in series with described power tube, described fly-wheel diode is connected in parallel to the branch road by inductance coil and resistant series.
Further, described power tube is large power triode.
Further, the base stage of described large power triode is pwm signal input, and collector electrode connects with ground, and emitter-base bandgap grading is connected with one end of described fly-wheel diode, and the other end of described fly-wheel diode connects with power supply.
Further, described power tube is high-power MOS tube.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the electrical block diagram of PWM formula controller of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In conjunction with a kind of electrohydraulic proportional am-plifier shown in Fig. 1-2, comprise connect successively controller, proportional amplifier, electro-hydraulic proportional valve, actuator and load, detection feedback circuit is connected with between described controller and described load, described controller is electrohydraulic proportional controller, the fly-wheel diode that described electrohydraulic proportional controller comprises power tube and is connected in series with described power tube, described fly-wheel diode is connected in parallel to the branch road by inductance coil and resistant series.
In the present embodiment, described power tube is large power triode.
In the present embodiment, the base stage of described large power triode is pwm signal input, and collector electrode connects with ground, and emitter-base bandgap grading is connected with one end of described fly-wheel diode, and the other end of described fly-wheel diode connects with power supply.
In the present embodiment, described power tube is high-power MOS tube.
In the present embodiment, as shown in Figure 2, the core of electrohydraulic proportional controller is exactly adopt the electric current in PWM control ratio electromagnet coil, the conducting of pwm signal control switch pipe and cut-off, the voltage waveform being added in proportion electro-magnet coil is that the cycle is certain, the square wave that pulse duration is adjustable, frequency due to pwm signal is generally greater than the frequency range of more than 10 times proportioning valves, so the mean value of the motion of an armature response signal PWM, the citation form of pwm control circuit is that proportion electro-magnet equivalent coil adds equivalent resistance, fly-wheel diode in parallel, power supply is added to through large power triode or high-power MOS tube.
What the utility model provided employing is digital, (pulse width modulation) is controlled by PWM, by the working state control of power tube on off state, power consumption greatly reduces, and without the need to separately adding vibrating signal, antijamming capability is strong, lag time is short, and repeatable accuracy is high, and parameter adjustment can set in advance, without the need to manual adjustment, efficiency has and improves greatly.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement etc., all should be included within protection range of the present utility model.
Claims (4)
1. an electrohydraulic proportional am-plifier, it is characterized in that, comprise connect successively controller, proportional amplifier, electro-hydraulic proportional valve, actuator and load, detection feedback circuit is connected with between described controller and described load, described controller is electrohydraulic proportional controller, the fly-wheel diode that described electrohydraulic proportional controller comprises power tube and is connected in series with described power tube, described fly-wheel diode is connected in parallel to the branch road by inductance coil and resistant series.
2. electrohydraulic proportional am-plifier as claimed in claim 1, it is characterized in that, described power tube is large power triode.
3. electrohydraulic proportional am-plifier as claimed in claim 2, it is characterized in that, the base stage of described large power triode is pwm signal input, and collector electrode connects with ground, emitter-base bandgap grading is connected with one end of described fly-wheel diode, and the other end of described fly-wheel diode connects with power supply.
4. electrohydraulic proportional am-plifier as claimed in claim 1, it is characterized in that, described power tube is high-power MOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719295.3U CN204290892U (en) | 2014-11-25 | 2014-11-25 | A kind of electrohydraulic proportional am-plifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719295.3U CN204290892U (en) | 2014-11-25 | 2014-11-25 | A kind of electrohydraulic proportional am-plifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204290892U true CN204290892U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420719295.3U Expired - Fee Related CN204290892U (en) | 2014-11-25 | 2014-11-25 | A kind of electrohydraulic proportional am-plifier |
Country Status (1)
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| CN (1) | CN204290892U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015692A (en) * | 2016-06-27 | 2016-10-12 | 南昌大学 | Card inserting type flutter signal self-adaptive proportional valve amplifier |
| CN106051269A (en) * | 2016-06-27 | 2016-10-26 | 南昌大学 | Integrated flutter signal self-adaptive proportional pump amplifier |
| CN106246986A (en) * | 2016-06-27 | 2016-12-21 | 南昌大学 | Integrated form vibrating signal self adaptation proportional valve amplifier |
| CN112255933A (en) * | 2020-09-11 | 2021-01-22 | 瓴芯电子科技(无锡)有限公司 | Control circuit and control method of electromagnetic proportional valve |
| CN113612448A (en) * | 2021-07-21 | 2021-11-05 | 同济大学 | Digital electro-hydraulic proportional amplifier with ZVS soft switch |
-
2014
- 2014-11-25 CN CN201420719295.3U patent/CN204290892U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015692A (en) * | 2016-06-27 | 2016-10-12 | 南昌大学 | Card inserting type flutter signal self-adaptive proportional valve amplifier |
| CN106051269A (en) * | 2016-06-27 | 2016-10-26 | 南昌大学 | Integrated flutter signal self-adaptive proportional pump amplifier |
| CN106246986A (en) * | 2016-06-27 | 2016-12-21 | 南昌大学 | Integrated form vibrating signal self adaptation proportional valve amplifier |
| CN106051269B (en) * | 2016-06-27 | 2018-05-22 | 南昌大学 | The adaptive ratio pump amplifier of integrated form vibrating signal |
| CN106246986B (en) * | 2016-06-27 | 2019-02-01 | 南昌大学 | The adaptive proportional valve amplifier of integrated form vibrating signal |
| CN112255933A (en) * | 2020-09-11 | 2021-01-22 | 瓴芯电子科技(无锡)有限公司 | Control circuit and control method of electromagnetic proportional valve |
| CN112255933B (en) * | 2020-09-11 | 2022-01-14 | 瓴芯电子科技(无锡)有限公司 | Control circuit and control method of electromagnetic proportional valve |
| CN113612448A (en) * | 2021-07-21 | 2021-11-05 | 同济大学 | Digital electro-hydraulic proportional amplifier with ZVS soft switch |
| CN113612448B (en) * | 2021-07-21 | 2024-02-27 | 同济大学 | Digital electrohydraulic proportional amplifier with ZVS soft switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151125 |