CN202914850U - Modified proportional valve drive return circuit - Google Patents
Modified proportional valve drive return circuit Download PDFInfo
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- CN202914850U CN202914850U CN 201220568066 CN201220568066U CN202914850U CN 202914850 U CN202914850 U CN 202914850U CN 201220568066 CN201220568066 CN 201220568066 CN 201220568066 U CN201220568066 U CN 201220568066U CN 202914850 U CN202914850 U CN 202914850U
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Abstract
The utility model discloses a modified proportional valve drive return circuit. The modified proportional valve drive return circuit comprises a proportional valve F1. The modified proportional valve drive return circuit is characterized in that a control input end of the proportional valve F1 is connected with a drive circuit (3), an operational amplifying circuit (2) and a master control circuit (1). The master control circuit (1) is composed of a main control chip U1 and an enabled capacitance C0. The operational amplifying circuit (2) is composed of a driver chip U2, a filter capacitor C1-C4, a filtering electrolytic capacitor EC1, a crystal oscillator TSO1 and a filter resistance R4. The drive circuit (3) is composed of a metal oxide semiconductor (MOS) tube Q1, a choke flow inductance L1, a freewheel diode D1, a sample resistance R1, a drive resistance R2 and a pull-down resistor R3. A signal output end of the main control chip U1 is connected with a signal input end of the driver chip U2, and the input end of the drive circuit (3) is connected with the output end of the driver chip U2. A circuit structure including a constant flow source generator, a flutter current generator and a signal superimpose is formed through an integration of the master control circuit (1), the operational amplifying circuit (2) and the drive circuit (3). The modified proportional valve drive return circuit has the advantages of being simple in structure, good in consistency and strong in anti-jamming capability.
Description
Technical field
The utility model relates to a kind of drive circuit, and especially a kind of improved Proportional valve drives the loop, is that the strong Proportional valve of a kind of antijamming capability drives the loop.Belong to industry control and technical field of automation.
Background technique
Along with the price of Proportional valve descends gradually, and contrast with the traditional electrical magnet valve, Proportional valve can realize gradually opening the advantage of gradually closing, be widely used in industrial control equipment, particularly be applied to hydraulic system and improve the performance of equipment, make the machinery action of equipment softer, and the life time of extension device.But the driving of Proportional valve is much more difficult compared with the traditional electrical magnet valve, if drive undesirable direct performance and the life-span that affects Proportional valve, perhaps damage the power component of drive circuit, so Proportional valve need to drive with current constant mode, and the magnetic hysteresis of signal stack vibrating signal with the reply proportion electro-magnet will driven.
At present, the Proportional valve drive circuit of prior art all is as the constant current source driving signal basically with operational amplifier, as shown in Figure 1, produce the Dither source by the Dither generator, and then by operational amplifier to both mixing, the driving signal that obtains wanting drives Proportional valve F1 through metal-oxide-semiconductor Q1.This circuit has each function module that Proportional valve F1 drives, can substantially realize by demand the driving of Proportional valve F1, but there is following shortcoming in this circuit: (1) discrete electronic component is more so that circuit structure complicated, layout to pcb board is had relatively high expectations, during debugging during for every a pcb board constant current drive signal generator and Dither generator all need to debug again separately, debug very inconvenient, be difficult to during volume production accomplish that the driving signal of each piece plate is more unified, need to proofread and correct each piece plate.(2) circuit easily is subjected to electromagnetic interference at work, can cause Proportional valve to drive when serious undesired, and logic error appears in the equipment work of making, and is not desirable Proportional valve drive circuit obviously.
In sum, need to provide a kind of simple in structure, high conformity, and the strong Proportional valve drive circuit of antijamming capability solves above problem.
The model utility content
The purpose of this utility model, in order to solve the problem that prior art Proportional valve driving circuit structure is complicated, be subject to electromagnetic interference, provide a kind of improved Proportional valve to drive the loop, its have simple in structure, level of integration is high, high conformity and the strong characteristics of antijamming capability.
The purpose of this utility model can reach by the following technical programs:
A kind of improved Proportional valve drives the loop, comprises Proportional valve F1, and it is characterized in that: the control input end of Proportional valve F1 is connected with drive circuit, operational amplification circuit and governor circuit in turn; Described governor circuit by main control chip U1 with enable capacitor C 0 and connect and compose, operational amplification circuit connects and composes by driving chip U2 and filter capacitor C1～C4, electrolytic capacitor filter EC1, crystal oscillator TSO1, filter resistance R4, and drive circuit is connected and composed by metal-oxide-semiconductor Q1, choke induction L1, sustained diode 1, sample resistance R1, driving resistance R 2 and pull down resistor R3; The signal output part of described main control chip U1 is connected with the signal input part that drives chip U2, and the input end of described drive circuit is connected with the output terminal that drives chip U2; Integrated the function of [constant generator, Dither generator and signal superimposer by governor circuit, operational amplification circuit and drive circuit, the output constant current mode drives signal, realizes the driving of Comparative Examples valve F1.
The purpose of this utility model can also reach by the following technical programs:
A kind of embodiment of the present utility model is: in the described governor circuit, the pin 8 of described main control chip U1 is by enabling capacitor C 0 ground connection; In the described operational amplification circuit, the pin 15 of described driving chip U2 is connected with resistance-capacitor filter branch road, and this resistance-capacitor filter props up route filter capacitor C1, electrolytic capacitor filter EC1 and filter resistance R4 is formed by connecting; Filter capacitor C2 and an end ground connection, another termination after C4 is in parallel drive the pin 23 of chip U2, and three pins of crystal oscillator TSO1 connect respectively the pin 21,22,23 that drives chip U2, consist of the vibration branch road; Be connected cooperation with operational amplification circuit by governor circuit and consist of [constant generator, Dither generator circuit structure.
A kind of embodiment of the present utility model is: in the described drive circuit, the D utmost point of metal-oxide-semiconductor Q1 is connected the negative pole of Proportional valve F1 with choke induction L1 by the positive pole of diode D1 connection Proportional valve F1, by sample resistance R1, the G utmost point of described metal-oxide-semiconductor Q1 is by the pin 14 of driving resistance R 2 connection driving chip U2, by pull down resistor R3 ground connection, the S utmost point ground connection of metal-oxide-semiconductor Q1; Be connected the circuit structure that cooperation consists of the signal superimposer with operational amplification circuit by the drive circuit governor circuit.
A kind of embodiment of the present utility model is: the pin 16 that drives chip U2 is connected with 13 pin of main control chip U1, the pin 18 that drives chip U2 is connected with 16 pin of main control chip U1, the pin 20 that drives chip U2 is connected with 17 pin of main control chip U1, the pin 24 that drives chip U2 is connected with 15 pin of main control chip U1, the pin 26 that drives chip U2 is connected with 14 pin of main control chip U1, the pin 27 that drives chip U2 is connected with 19 pin of main control chip U1, and the pin 28 that drives chip U2 is connected with 20 pin of main control chip U1.
A kind of embodiment of the present utility model is: the pin 9 of main control chip U1, and pin 8, pin 19 and the pin 23 of driving chip U2, the pin 1 of crystal oscillator TSO1, the end of filter capacitor C2～C4 connects the 5V power supply; The end of filter resistance R4, the positive pole of electrolytic capacitor filter EC1, the positive pole of Proportional valve F1, the negative pole of sustained diode 1 connects the 24V power supply.
A kind of embodiment of the present utility model is: pin 7, pin 17 and pin 21, the pin 2 of crystal oscillator TSO, an end that enables capacitor C 0, the negative pole of electrolytic capacitor filter EC1, the end of filter capacitor C1～C4 and the end ground connection of pull down resistor R3 of the pin 7 of described main control chip U1, driving chip U2.
The utlity model has following outstanding beneficial effect:
1, the utility model adopts the mode of monolithic integrated circuit to integrate the function of [constant generator, Dither generator and signal superimposer, control logic is transferred to through main control chip U1 and drives chip U2, drive chip U2 and calculate through internal algorithm, export the driving that desirable driving signal is realized the Comparative Examples valve.
2, monolithic integrated circuit design of the present utility model, affected by peripheral component little, circuit debugging gets up simply, convenience, each piece circuit board electrical properties is consistent when being easy to realize the batch volume production, need not circuit board is proofreaied and correct, be conducive to batch production, stable work in work on equipment is not subjected to other distrubance source to affect normal operation.
3, whole circuit volume of the present utility model is little, simple in structure, good in anti-interference performance, and product percent of pass is high, has broad application prospects.
Description of drawings
Fig. 1 is separated Proportional valve driving circuit principle figure in the prior art.
Fig. 2 is the circuit theory diagrams of the utility model specific embodiment 1.
Wherein, 1-governor circuit, 2-operational amplification circuit, the 3-drive circuit, Q1-MOS pipe, L1-choke induction, the D1-fly-wheel diode, the R1-sample resistance, R2-drives resistance, the R3-pull down resistor, the R4-filter resistance, C0-enables electric capacity, C1～C4-filter capacitor, EC1-electrolytic capacitor filter, TSO1-crystal oscillator, the U1-main control chip, U2-drives chip.
Embodiment
Specific embodiment 1:
Fig. 2 consists of specific embodiment of the utility model 1.
With reference to Fig. 2, the present embodiment comprises Proportional valve F1, and the control input end of Proportional valve F1 is connected with drive circuit 3, operational amplification circuit 2 and governor circuit 1 in turn; Described governor circuit 1 by main control chip U1 with enable capacitor C 0 and connect and compose, operational amplification circuit 2 connects and composes by driving chip U2 and filter capacitor C1～C4, electrolytic capacitor filter EC1, crystal oscillator TSO1, filter resistance R4, and drive circuit 3 is connected and composed by metal-oxide-semiconductor Q1, choke induction L1, sustained diode 1, sample resistance R1, driving resistance R 2 and pull down resistor R3; The signal output part of described main control chip U1 is connected with the signal input part that drives chip U2, and the input end of described drive circuit 3 is connected with the output terminal that drives chip U2; Integrated the function of [constant generator, Dither generator and signal superimposer by governor circuit 1, operational amplification circuit 2 and drive circuit 3, the output constant current mode drives signal, realizes the driving of Comparative Examples valve F1.
In the present embodiment:
Main control chip U1 can adopt the conventional singlechip chip with designing requirement, drives chip U2 and can adopt the conventional chip with operation amplifier, driving function.
The pin 8 of main control chip U1 is by enabling capacitor C 0 ground connection; The pin 15 of described driving chip U2 is connected with resistance-capacitor filter branch road, and this resistance-capacitor filter props up route filter capacitor C1, electrolytic capacitor filter EC1 and filter resistance R4 is formed by connecting; Filter capacitor C2 and an end ground connection, another termination after C4 is in parallel drive the pin 23 of chip U2, and three pins of crystal oscillator TSO1 connect respectively the pin 21,22,23 that drives chip U2, consist of the vibration branch road; Are connected with operational amplification circuit connect to cooperate by governor circuit 1 and consist of [constant generator, Dither generator circuit structure.
The D utmost point of metal-oxide-semiconductor Q1 is connected the negative pole of Proportional valve F1 with choke induction L1 by the positive pole of diode D1 connection Proportional valve F1, by sample resistance R1, the G utmost point of described metal-oxide-semiconductor Q1 is by the pin 14 of driving resistance R 2 connection driving chip U2, by pull down resistor R3 ground connection, the S utmost point ground connection of metal-oxide-semiconductor Q1; Are connected with operational amplification circuit by drive circuit 3 governor circuits 1 and connect cooperate the circuit structure that consists of the signal superimposer.
The pin 16 that drives chip U2 is connected with 13 pin of main control chip U1, the pin 18 that drives chip U2 is connected with 16 pin of main control chip U1, the pin 20 that drives chip U2 is connected with 17 pin of main control chip U1, the pin 24 that drives chip U2 is connected with 15 pin of main control chip U1, the pin 26 that drives chip U2 is connected with 14 pin of main control chip U1, the pin 27 that drives chip U2 is connected with 19 pin of main control chip U1, and the pin 28 that drives chip U2 is connected with 20 pin of main control chip U1.
The pin 9 of main control chip U1, pin 8, pin 19 and the pin 23 of driving chip U2, the pin 1 of crystal oscillator TSO1, the end of filter capacitor C2～C4 connects the 5V power supply; The end of filter resistance R4, the positive pole of electrolytic capacitor filter EC1, the positive pole of Proportional valve F1, the negative pole of sustained diode 1 connects the 24V power supply.
Pin 7, pin 17 and pin 21, the pin 2 of crystal oscillator TSO, an end that enables capacitor C 0, the negative pole of electrolytic capacitor filter EC1, the end of filter capacitor C1～C4 and the end ground connection of pull down resistor R3 of the pin 7 of described main control chip U1, driving chip U2.
The working principle of the present embodiment:
With reference to Fig. 2, at first main control chip U1 is transferred to control logic and drives chip U2, by pin 14 output drive signals, make metal-oxide-semiconductor Q1 conducting after driving chip U2 internal arithmetic, electric current is from 24V passing ratio valve F1, choke induction L1, sample resistance R1, metal-oxide-semiconductor Q1 to ground; Because the effect of choke induction L1, electric current slowly increases, drive chip U2 by the electric current on pin 11 and the pin 12 detection sample resistance R2 Real-Time Monitoring circuit, when reaching the CLV ceiling limit value of setting, weakens in electric current the driving signal of pin 14, make the electric current slow decreasing, the driving signal that strengthens pin 14 when electric current reaches the lower limit of setting makes again electric current slowly increase, because the speed of adjusting is very fast, the constant current that forms Proportional valve F1 that goes round and begins again drives; Simultaneously, drive chip U2 the oscillator signal of crystal oscillator TSO1 by after the internal algorithm computing, produce the vibrating signal pin 14 that is added to and export together, form the driving signal that meets demand, realize the ideal driving of Proportional valve F1.
The above; it only is the better specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the scope that the utility model discloses; be equal to replacement or change according to the technical solution of the utility model and model utility design thereof, all belonged to protection domain of the present utility model.
Claims (6)
1. an improved Proportional valve drives the loop, comprises Proportional valve F1, and it is characterized in that: the control input end of Proportional valve F1 is connected with drive circuit (3), operational amplification circuit (2) and governor circuit (1) in turn; Described governor circuit (1) by main control chip U1 with enable capacitor C 0 and connect and compose, operational amplification circuit (2) connects and composes by driving chip U2 and filter capacitor C1～C4, electrolytic capacitor filter EC1, crystal oscillator TSO1, filter resistance R4, and drive circuit (3) is connected and composed by metal-oxide-semiconductor Q1, choke induction L1, sustained diode 1, sample resistance R1, driving resistance R 2 and pull down resistor R3; The signal output part of described main control chip U1 is connected with the signal input part that drives chip U2, and the input end of described drive circuit (3) is connected with the output terminal that drives chip U2; Integrated the circuit structure of [constant generator, Dither generator and signal superimposer by governor circuit (1), operational amplification circuit (2) and drive circuit (3), the output constant current mode drives signal, realizes the driving of Comparative Examples valve F1.
2. a kind of improved Proportional valve according to claim 1 drives the loop, and it is characterized in that: in the described governor circuit (1), the pin 8 of described main control chip U1 is by enabling capacitor C 0 ground connection; In the described operational amplification circuit (2), the pin 15 of described driving chip U2 is connected with resistance-capacitor filter branch road, and this resistance-capacitor filter props up route filter capacitor C1, electrolytic capacitor filter EC1 and filter resistance R4 is formed by connecting; Filter capacitor C2 and an end ground connection, another termination after C4 is in parallel drive the pin 23 of chip U2, and three pins of crystal oscillator TSO1 connect respectively the pin 21,22,23 that drives chip U2, consist of the vibration branch road; Be connected 2 by governor circuit (1) with operational amplification circuit) connect to cooperate consist of [constant generator, Dither generator circuit structure.
3. a kind of improved Proportional valve according to claim 1 and 2 drives the loop, it is characterized in that: in the described drive circuit (3), the D utmost point of metal-oxide-semiconductor Q1 is connected the negative pole of Proportional valve F1 with choke induction L1 by the positive pole of diode D1 connection Proportional valve F1, by sample resistance R1, the G utmost point of described metal-oxide-semiconductor Q1 is by the pin 14 of driving resistance R 2 connection driving chip U2, by pull down resistor R3 ground connection, the S utmost point ground connection of metal-oxide-semiconductor Q1; Be connected 2 by drive circuit (3) governor circuit (1) with operational amplification circuit) connect to cooperate consist of the circuit structure of signal superimposer.
4. a kind of improved Proportional valve according to claim 1 and 2 drives the loop, it is characterized in that: the pin 16 that drives chip U2 is connected with 13 pin of main control chip U1, the pin 18 that drives chip U2 is connected with 16 pin of main control chip U1, the pin 20 that drives chip U2 is connected with 17 pin of main control chip U1, the pin 24 that drives chip U2 is connected with 15 pin of main control chip U1, the pin 26 that drives chip U2 is connected with 14 pin of main control chip U1, the pin 27 that drives chip U2 is connected with 19 pin of main control chip U1, and the pin 28 that drives chip U2 is connected with 20 pin of main control chip U1.
5. a kind of improved Proportional valve according to claim 1 and 2 drives the loop, it is characterized in that: the pin 9 of main control chip U1, drive pin 8, pin 19 and the pin 23 of chip U2, the pin 1 of crystal oscillator TSO1, the end of filter capacitor C2～C4 connects the 5V power supply; The end of filter resistance R4, the positive pole of electrolytic capacitor filter EC1, the positive pole of Proportional valve F1, the negative pole of sustained diode 1 connects the 24V power supply.
6. a kind of improved Proportional valve according to claim 1 and 2 drives the loop, it is characterized in that: pin 7, pin 17 and pin 21, the pin 2 of crystal oscillator TSO, an end that enables capacitor C 0, the negative pole of electrolytic capacitor filter EC1, the end of filter capacitor C1～C4 and the end ground connection of pull down resistor R3 of the pin 7 of main control chip U1, driving chip U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568066 CN202914850U (en) | 2012-10-31 | 2012-10-31 | Modified proportional valve drive return circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220568066 CN202914850U (en) | 2012-10-31 | 2012-10-31 | Modified proportional valve drive return circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202914850U true CN202914850U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220568066 Expired - Lifetime CN202914850U (en) | 2012-10-31 | 2012-10-31 | Modified proportional valve drive return circuit |
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| CN (1) | CN202914850U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111121304A (en) * | 2019-12-30 | 2020-05-08 | 四川虹美智能科技有限公司 | Water heater and control method thereof |
-
2012
- 2012-10-31 CN CN 201220568066 patent/CN202914850U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111121304A (en) * | 2019-12-30 | 2020-05-08 | 四川虹美智能科技有限公司 | Water heater and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY CO., Free format text: FORMER NAME: FOSHAN SHUNDE REALDESIGN ELECTRONICS INDUSTRY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528300 Shunde, Guangdong, Daliang Industrial Park, Fengxiang, Xiang Xiang Road, No. 1 Patentee after: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 528300 Guangdong province Foshan city Shunde District Daliang Industrial Park Fengxiang Huaye Road No. 1 Patentee before: FOSHAN SHUNDE REAL DESIGN ELECTRONICS IND CO.,LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |
|
| CX01 | Expiry of patent term |