CN209229103U - A kind of pilot-operated type double electromagnet proportional valve controller based on current automatic adaptation - Google Patents
A kind of pilot-operated type double electromagnet proportional valve controller based on current automatic adaptation Download PDFInfo
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- CN209229103U CN209229103U CN201821980035.6U CN201821980035U CN209229103U CN 209229103 U CN209229103 U CN 209229103U CN 201821980035 U CN201821980035 U CN 201821980035U CN 209229103 U CN209229103 U CN 209229103U
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Abstract
The utility model discloses a kind of pilot-operated type double electromagnet proportional valve controller based on current automatic adaptation, including control unit, RS232 conversion circuit, signal conditioning circuit, power driver module, power conversion module, input/output interface module；RS-232 conversion circuit is used to communicate with host computer, and carries out parameter setting to control unit；Signal conditioning circuit is improved for closed-loop control and the acquisition of feedback signal, and power driver module is used for the PWM command signal that reception control unit issues, and drives proportion electro-magnet；Power conversion module realizes the conversion of voltage needed for each module on two-way proportional valve control, is each functional module power supply on two-way proportional valve control.The utility model it is economical it is high, frequency response is fast, good reliability, it is applied widely the advantages that.
Description
Technical field
The utility model relates to electrohydraulic control technology field, the double electromagnetism of especially a kind of pilot-operated type based on current automatic adaptation
Iron proportional valve controller.
Background technique
China in terms of the research of high-end proportional valve controller be in the starting stage, control performance, in terms of
There is also biggish gaps compared with same kind of products at abroad, and domestic high-end proportional valve controller market is substantially by famous foreign at present
Hydraulic component business monopoly.
The control performance of two-way proportional valve current automatic adaptation fuzzy controller (hereinafter referred to as two-way proportional valve control)
Close to servo-system, flow is big, resistance tocrocking is strong, reliability and economy are high.Two-way proportional valve control is two-way proportional valve
Control core, has the function of scheduling controlling, power drive, signal processing etc., and performance superiority and inferiority directly affects the control of whole system
Performance processed.Current superfast electric-hydraulic proportion valve technology has been applied in external some famous injection molding machine companies.
It is influenced by proportional valve control system compact, integrated, networking, intelligentized development trend, market comparative example
The requirement of valve control is higher and higher, and the performance for improving proportional valve controller is research emphasis.Currently, what is used in the market is two-way
The generally existing response speed of the matched controller of proportioning valve product is not high, precision is inadequate, consistency is bad, service life not long etc. feelings
Condition.
Utility model content
The pilot-operated type double electromagnet proportional valve control based on current automatic adaptation that the purpose of this utility model is to provide a kind of
Device.
Realize the technical solution of the utility model aim are as follows: a kind of pilot-operated type double electromagnet ratio based on current automatic adaptation
Valve control, including it is control unit, RS232 conversion circuit, signal conditioning circuit, power driver module, power conversion module, defeated
Enter output interface module；Described control unit respectively with RS232 conversion circuit, signal conditioning circuit, power driver module, power supply
Conversion module, input/output interface module connection, the power driver module includes two-way power driving circuit；RS-232 conversion
Circuit is used to communicate with host computer, and carries out parameter setting to control unit；Signal conditioning circuit is for receiving spool displacement biography
Sensor signal and electromagnet current signal；Power driver module is used for the PWM command signal that reception control unit issues, and drives ratio
Example electromagnet；Conversion of the power conversion module for voltage needed for each module on two-way proportional valve control.
The utility model compared with prior art, remarkable advantage are as follows: (1) the two-way proportional valve control of the utility model
It aims at control two-way proportional direction valve and designs, can be by two work of electromagnet of pid algorithm Collaborative Control, and algorithm can be passed through
Adaptive output matching current；(2) the specific economy of the two-way proportional valve control of the utility model is high, frequency response is fast, reliability
The advantages that good, applied widely.
Detailed description of the invention
Fig. 1 is proportional valve controller composition block diagram.
Fig. 2 is proportional valve controller working principle block diagram.
Fig. 3 is reversal connection discharging type power drive schematic diagram.
Specific embodiment
A kind of pilot-operated type double electromagnet proportional valve controller based on current automatic adaptation, including control unit, RS232 conversion
Circuit, signal conditioning circuit, power driver module, power conversion module, input/output interface module；Described control unit difference
It is connect with RS232 conversion circuit, signal conditioning circuit, power driver module, power conversion module, input/output interface module,
The power driver module includes two-way power driving circuit；
RS-232 conversion circuit is used to communicate with host computer, and carries out parameter setting to control unit；Signal conditioning circuit
It is improved for closed-loop control and the acquisition of feedback signal, first is that receiving valve core displacement sensor signal, it is single that control is sent after conditioning
Member constitutes position feedback closed-loop control, second is that detection electromagnet current signal, sends control unit and constitute current feedback after conditioning
Closed-loop control；Power driver module is used for the PWM command signal that reception control unit issues, and drives proportion electro-magnet；Power supply turns
Change the mold conversion of the block for voltage needed for each module on two-way proportional valve control；
When two-way proportional valve control receives forward instruction signal, displacement sensor by the Displacement Feedback of main valve plug extremely
Obtained instruction value and value of feedback are exported control deviation by fuzzy PID algorithm more afterwards, generated by control unit, control unit
Pwm signal drives internal power circuit, and the electric current of generation is input to positive proportion electro-magnet, control bound core forward motion, directly
Equal to actual feedback and given instruction value, spool is maintained at equilbrium position；Conversely, reversed electromagnet is powered, spool is to anti-
To movement；When command signal is zero, spool be maintained under the action of centralizing spring in position.
Control unit chip uses the dspic30F3013 model single-chip microcontroller of Microchip company.
RS232 conversion circuit using SIPEX company RS232 protocol chip SP3232EE, SP3232EE chip T1IN,
R1OUT pin is connected with U1ATX, U1ART of control unit.
Power driving circuit is using reversal connection discharging type power drive.
Power-switching circuit is used to 24V power supply being converted to ± 15V power supply ,+5V power supply.
The utility model can realize host computer to the parameter of two-way proportional valve control by serial ports RS232 bus communication
Configuration and quantity of state monitoring.When work, receives external demand signal (0~± 10V) all the way and export two-way driving signal reality simultaneously
Now to the control of two electromagnet of pilot valve, the then movement of control bound spool, while collecting spool position feed back signal, make
Valve core of main valve moves to the position of requirement according to control instruction, and the proportioning valve highest dynamic used of arranging in pairs or groups is up to 60Hz.Control
The input terminal of device is the position feed back signal of external control signal and proportioning valve, and inside uses fuzzy PID algorithm output pwm signal
It is applied to the electromagnet of pilot valve, passes through electricity-final position-force control for realizing main valve of liquid conversion.
The utility model realizes following technical indicator:
(1) supply voltage: 24 ± 1V of power electricity；
(2) input/output signal requirement: input signal is 0~± 10V, 1 tunnel of port number；Output signal is electric current, single-pass
0~2.7A of road is adjustable, 2 tunnel of port number；
(3) realize that RS232 bus communication, baud rate 9600bps realize parameter setting and condition monitoring with host computer；
(4) two ring closed-loop controls of proportional valve position ring and electric current loop are realized；
(5) spool dead zone function can be achieved；
(6) it sends pwm control signal and drives proportion electro-magnet.
The utility model is described in detail below with reference to embodiment.
Embodiment
A kind of controller of the two-way proportional valve control of the present embodiment as two-way proportional valve, response control instruction are complete
The real-time closed-loop control of electric current loop and position ring in pairs to proportioning valve.Two-way proportional valve control circuit mainly includes 6 function
It can module: control unit, RS-232 conversion circuit, signal conditioning circuit, two-way power driving circuit, power-switching circuit, defeated
Enter output interface module, as shown in Figure 1.
External signal includes analog signals and digital quantity signal, the ADC that analog input signal is carried by control unit
Translation interface realizes that output signal is converted by driving circuit and realized；Signal conditioning circuit realizes closed-loop control and feedback signal
Acquisition conditioning, first is that control unit composition position feedback closed-loop control is sent after receiving valve core displacement sensor signal condition, two
It is to send control unit after detecting electromagnet current signal condition to constitute current feedback closed-loop control；Power driver module is for connecing
The PWM command signal that control unit issues is received, drives proportion electro-magnet as required；RS-232 conversion circuit is realized logical with host computer
News and to the parameter setting of control unit；Power module realizes the conditioning of voltage needed for each module on two-way proportional valve control,
To each functional module power supply on two-way proportional valve control；Control unit completes signal acquisition, signal processing, fuzzy tune
The functions such as section and output control signal.
The two ring control methods that two-way proportional valve control is combined using position ring and electric current loop, working principle such as Fig. 2 institute
Show, working principle is as follows:
Two-way proportional valve controls power supply before use, two-way proportional valve control connects 24V, complete each functional module be powered,
Control unit initialization and self-test；Controller receives host computer instruction by RS232 bus, realizes the setting of controller parameter；
After controller parameter is set, when two-way proportional valve control receives forward instruction signal, displacement sensor is by main valve plug
Displacement Feedback to controller, obtained instruction value and value of feedback are passed through fuzzy PID algorithm output control by controller more afterwards
Deviation generates pwm signal, drives internal power circuit, and the electric current of generation is input to positive proportion electro-magnet, and control bound core is just
To movement, until actual feedback and given instruction value are equal, spool is maintained at equilbrium position.Conversely, reversed electromagnet is powered,
Spool runs back.When signal is zero, spool be maintained under the action of centralizing spring in position.In the process of valve core movement
In, safeguard measure is taken when electric current exceeds design value, controller is avoided to damage.
(1) control unit
The selection of control unit chip directly influences the performance of entire controller, mainly completes serial communication, control is calculated
Method realizes, the work of Digital Signal Processing and each submodule of control circuit, according to technical requirements and control unit performance requirement,
Control unit chip uses the dspic30F3013 model single-chip microcontroller of Microchip company, the integrated chip control of single-chip microcontroller
The chip of function processed and the quick computing function of DSP, is powered using 5V, enhances noise immunity and steady keyness, is suitable for various evils
Bad environment.Controller peripheral circuit diagram mainly includes power supply circuit, reset circuit, clock circuit composition.One is designed to system
Electrification reset circuit, circuit access the MCLR pin of single-chip microcontroller, and external active crystal oscillator is selected to provide clock circuit for single-chip microcontroller.
(2) RS232 conversion circuit
Host computer needs to be communicated by RS232 bus with controller, realizes the setting of parameter, selects SIPEX company
RS232 protocol chip SP3232EE, SP3232EE chip T1IN, R1OUT pin and U1ATX, U1ART phase of control unit
Even, chip power supply+3.0V~+5.5V, 0 DEG C~+70 DEG C of operating temperature.
(3) signal conditioning circuit
In proportional valve control, input signal be 0~± 10V, external valve core position sensor feedback signal be 4~
20mA, while the electric current of 2 road electromagnet is acquired, and the analog input voltage of control unit requires to be not more than+5V, it is therefore desirable to
Signal conditioning circuit will need the analog signal acquired to convert to OK range, is input to control unit and carries out calculation process.
To guarantee to reduce the common mode interference of input signal, input signal will use Differential Input, while use filter circuit
The influence of noise is reduced, this function selects conventional arithmetic and control unit, it is contemplated that circuit board volume selects four high guaily unit.It is filtered
Signal passes through signal conditioning circuit again, and after conditioning to the receivable voltage range of control unit, then input control unit is transported
Calculation processing, proposed adoption controller LM2902D chip guarantee that the signal for being input to control unit is not negative using single-ended power+5V
Value, also functions to protective effect to the input interface of control unit.
(4) power driving circuit
On the basis of the analysis first generation unidirectional proportional valve controller, the power for being suitable for two-way proportional solenoid is selected to drive
Dynamic structure designs the hardware circuit of double proportion electro-magnet power drives, is realized and modulated with Digital Way.The control of two-way proportional valve
The drive module of device and the maximum difference of Single electromagnet proportional valve controller are the structure of drive module, control unit output
Two-way power drive signal passes through the driving that two-way power driving circuit realizes two electromagnet respectively, accordingly in double ratio electricity
The ADAPTIVE CONTROL of magnet current ring control parameter is also essentially different.
Power drive is the core of proportional valve controller, directly affect the stable state of proportional valve controller, dynamic property,
Functional reliability.Proportional valve controller requires power drive to meet the following conditions: exportable sufficiently large electric current driving ratio electricity
The coil of magnet；With good static and dynamic performance；The control electric current of output is sufficiently stable, can resist temperature and supply voltage
The interference such as variation.
For the speed for guaranteeing Dynamic response, the circuit implementation of switch mode power driving is using " reversal connection discharging type " power
Driving, as shown in Figure 3." reversal connection discharging type " power drive realizes proportion electro-magnet line by synchronizing PWM modulation to Ql, Q2
Loop current control accelerates the speed of electric current decline, but power component quantity is twice of " single tube modulation system " power drive, and
Dash current is big when two pipes synchronize on-off, and ripple current amplitude is larger, reduces ripple by the way of improving switching frequency.
(5) power-switching circuit
Power-switching circuit is the guarantee that entire hardware operates normally, and is one of the emphasis of entire hardware design.Entire ratio
Example valve control system is powered by 24V, is respectively necessary for generating following power supply:
± 15V power supply provides power supply for internal conditioning circuit；
+ 15V power supply provides power supply for metal-oxide-semiconductor driving chip, selects the technical grade DC/DC power supply of Guangzhou Jin Shengyang company
Module VRA_YMD-6WR3 realization+24V arrives the conversion of ± 15V；
+ 5V power supply provides DC power supply for RS232 chip and internal conditioning circuit, selects the work of Guangzhou Jin Shengyang company
Industry grade DC/DC power module F2405XT-2WR2 realization+24V arrives the conversion of+5V, and the modular peripheral interface unit is few, high-efficient
Up to 84%；
High-voltage driving circuit, the high pressure for providing 24V for electromagnet guide power supply, directly take external power supply；
+ 24V provides the DC power supply of 24V for spool feedback transducer, by taking after filtering external power supply.
(6) input/output interface module
It is that 6 feet arrange needle that director demon, which downloads jtag interface connector,；Controller RS232 bus communication interface connector is
4 foot toggle switch；Controller and displacement sensor interface connector are 4 foot toggle switch；Controller is connect with proportion electro-magnet interface
Device is 2 group of 2 foot toggle switch；Controller and external signal interface connector are 10 foot toggle switch.
Claims (5)
1. a kind of pilot-operated type double electromagnet proportional valve controller based on current automatic adaptation, which is characterized in that including control unit,
RS232 conversion circuit, signal conditioning circuit, power driver module, power conversion module, input/output interface module；The control
Unit processed respectively with RS232 conversion circuit, signal conditioning circuit, power driver module, power conversion module, input/output interface
Module connection, the power driver module includes two-way power driving circuit；RS-232 conversion circuit is used to communicate with host computer,
And parameter setting is carried out to control unit；Signal conditioning circuit is for receiving valve core displacement sensor signal and electromagnet current letter
Number；Power driver module is used for the PWM command signal that reception control unit issues, and drives proportion electro-magnet；Power conversion module
The conversion of voltage needed for each module on two-way proportional valve control.
2. the pilot-operated type double electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, feature exist
In control unit chip uses the dspic30F3013 model single-chip microcontroller of Microchip company.
3. the pilot-operated type double electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, feature exist
In RS232 conversion circuit uses T1IN, R1OUT of RS232 protocol chip SP3232EE, the SP3232EE chip of SIPEX company
Pin is connected with U1ATX, U1ART of control unit.
4. the pilot-operated type double electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, feature exist
In power driving circuit is using reversal connection discharging type power drive.
5. the pilot-operated type double electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, feature exist
In power-switching circuit is used to 24V power supply being converted to ± 15V power supply ,+5V power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821980035.6U CN209229103U (en) | 2018-11-28 | 2018-11-28 | A kind of pilot-operated type double electromagnet proportional valve controller based on current automatic adaptation |
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| CN201821980035.6U CN209229103U (en) | 2018-11-28 | 2018-11-28 | A kind of pilot-operated type double electromagnet proportional valve controller based on current automatic adaptation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178213A (en) * | 2020-09-30 | 2021-01-05 | 赵鑫 | High-temperature high-pressure environment electromagnetic valve |
| CN113431947A (en) * | 2021-06-10 | 2021-09-24 | 西北机电工程研究所 | Energy-saving drive circuit of electromagnetic directional valve based on MOSFET |
-
2018
- 2018-11-28 CN CN201821980035.6U patent/CN209229103U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178213A (en) * | 2020-09-30 | 2021-01-05 | 赵鑫 | High-temperature high-pressure environment electromagnetic valve |
| CN112178213B (en) * | 2020-09-30 | 2022-05-06 | 扬州苏油油成商贸实业有限公司 | High-temperature high-pressure environment electromagnetic valve |
| CN113431947A (en) * | 2021-06-10 | 2021-09-24 | 西北机电工程研究所 | Energy-saving drive circuit of electromagnetic directional valve based on MOSFET |
| CN113431947B (en) * | 2021-06-10 | 2023-08-04 | 西北机电工程研究所 | MOSFET-based energy-saving drive circuit for electromagnetic reversing valve |
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