CN109599246A - A kind of Single electromagnet proportional valve controller based on current automatic adaptation - Google Patents
A kind of Single electromagnet proportional valve controller based on current automatic adaptation Download PDFInfo
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- CN109599246A CN109599246A CN201811437122.1A CN201811437122A CN109599246A CN 109599246 A CN109599246 A CN 109599246A CN 201811437122 A CN201811437122 A CN 201811437122A CN 109599246 A CN109599246 A CN 109599246A
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- proportional valve
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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
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
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- 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
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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)
Abstract
The invention discloses a kind of Single electromagnet proportional valve controller based on current automatic adaptation, including control unit, RS232 conversion circuit, signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface module；The parameter that RS232 conversion circuit receives host computer signal contrast example valve control is configured；Signal conditioning circuit receives external voltage command signal, and acquires the displacement of ratio valve core and the magnitude of current of electromagnet, generates pwm control signal by the proportional valve position ring of control unit and two ring closed loop control algorithms of electric current loop；Power driving circuit is used for the PWM command signal that reception control unit issues, and carries out power amplification to pwm signal, drives proportion electro-magnet as required.The present invention it is economical it is high, precision is high, frequency response is fast, good reliability, it is applied widely the advantages that.
Description
Technical field
The present invention relates to electrichydraulic control field, especially a kind of Single electromagnet proportional valve control based on current automatic adaptation
Device.
Background technique
Proportional valve controller is proportioning valve " brain ", has the function of scheduling controlling, power drive, signal processing etc.,
Performance superiority and inferiority directly affects the control performance of whole system.The control performance of ratio control system close to servo-system, flow is big,
Resistance tocrocking is strong, reliability and economy are high, and application demand at home is increasing.China is in high-end proportional valve controller
Research aspect be in the starting stage, control performance, in terms of compared with same kind of products at abroad there is also biggish differences
Away from domestic high-end proportional valve controller market is substantially by famous foreign hydraulic component business monopoly at present.
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 becomes research emphasis.Currently, being used on domestic market
The matched generally existing response speed of controller of domestic proportioning valve product is high, situations such as consistency is bad, the service life is not long.
Summary of the invention
The purpose of the present invention is to provide a kind of Single electromagnet proportional valve controller based on current automatic adaptation.
Realize the technical solution of the object of the invention are as follows: a kind of Single electromagnet proportional valve controller based on current automatic adaptation,
Including RS232 conversion circuit, signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface module and control
Unit processed；The RS232 conversion circuit, signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface
Module is connect with control unit；The parameter that RS232 conversion circuit receives host computer signal contrast example valve control is configured；
Signal conditioning circuit receives external voltage command signal, and acquires the displacement of ratio valve core and the magnitude of current of electromagnet, leads to
Two ring closed loop control algorithms of the proportional valve position ring and electric current loop of crossing control unit generate pwm control signal；Power drive electricity
Road is used for the PWM command signal that reception control unit issues, and carries out power amplification to pwm signal, drives proportion electro-magnet.
Compared with prior art, the present invention its remarkable advantage are as follows: economy of the present invention is high, precision is high, frequency response is fast, reliability
Good, applied widely, the development of high-end proportional valve controller is, it can be achieved that the control of high-precision electro-hydraulic proportional valve, terminates other factory, state
Monopolization situation of the family in terms of high-end electrical-liquid control promotes the development of domestic electrical-liquid control industry.
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
As shown in Figure 1, a kind of Single electromagnet proportional valve controller based on current automatic adaptation, including RS232 conversion circuit,
Signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface module and control unit；The RS232 turns
Circuit, signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface module is changed to connect with control unit
It connects；The parameter that RS232 conversion circuit receives host computer signal contrast example valve control is configured；Signal conditioning circuit receives outer
Portion's voltage command signal, and the displacement of ratio valve core and the magnitude of current of electromagnet are acquired, pass through the proportioning valve of control unit
Two ring closed loop control algorithms of position ring and electric current loop generate pwm control signal；Power driving circuit is used for reception control unit
The PWM command signal of sending carries out power amplification to pwm signal, drives proportion electro-magnet.
Control unit chip uses the dspic30F3013 model single-chip microcontroller of Microchip company.
The T1IN of RS232 protocol chip SP3232EE, the SP3232EE chip of RS232 conversion circuit selection SIPEX company,
R1OUT pin is connected with U1ATX, U1ART of control unit, chip power supply+3.0V~+5.5V.
Signal conditioning circuit is for converting the analog signal for needing to acquire to control unit claimed range.
Power-switching circuit is used to 24V power supply being converted to ± 15V power supply ,+5V power supply.
The following describes the present invention in detail with reference to examples.
Embodiment
As shown in Figure 1, a kind of Single electromagnet proportional valve controller based on current automatic adaptation, including RS232 conversion circuit,
Signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface module and control unit；
Proportional valve controller is selected by control core, integrated drive chips IR2301 and metal-oxide-semiconductor of dsPIC30f3013
The scheme of loop of power circuit.Control circuit receives external voltage command signal by signal conditioning circuit, and passes through feedback potentiometer
It acquires the displacement of ratio valve core and the magnitude of current of electromagnet respectively with current detecting conditioning circuit, passes through the ratio of control unit
Two ring closed loop control algorithms of example valve position ring and electric current loop generate pwm control signal；Power driving circuit is for receiving control
The PWM command signal that unit issues carries out power amplification to pwm signal, drives proportion electro-magnet, circuit for power conversion as required
The conducting of metal-oxide-semiconductor is controlled according to driving signal, control electromagnet by size of current, electromagnet will drive proportioning valve
Valve core movement, working principle is as shown in attached drawing 2.
(1) control unit
The selection of control unit chip directly influences the performance of entire controller, main to complete communication, control algolithm meter
The work of calculation, 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 function of single-chip microcontroller
It can be powered using 5V with the chip of the quick computing function of DSP, enhance noise immunity and steady keyness, be suitable for various severe rings
Border.Controller peripheral circuit diagram mainly includes power supply circuit, reset circuit, clock circuit composition.One is designed to system to power on
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 acquisition will also be detected by the electric current of electromagnet, and the analog input voltage of control unit require to be not more than+
5V, it is therefore desirable to signal conditioning circuit will need the analog signal that acquires to convert to OK range, be input to control unit into
Row 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
Power drive is the core of proportional valve controller, directly affects stable state, the dynamic property of proportional valve controller,
And functional reliability.Proportional valve controller requires power drive to meet the following conditions: exportable sufficiently large electric current driving ratio
Example magnet spool；With good static and dynamic performance；The control electric current of output is sufficiently stable, can resist temperature and power supply
The interference such as voltage change.
The circuit implementation of switch mode power driving mostly uses greatly " single tube modulation system " power drive and " reversal connection off-load
Formula " power drive, as shown in Figure 3.Electronic component needed for " single tube modulation system " power drive structure is less, and control is simple, but dynamic
State frequency response is lower；For the dynamic property for guaranteeing controller, " reversal connection discharging type " power drive form, " reversal connection discharging type " are used
Power drive realizes the control of proportion electro-magnet coil current by synchronizing PWM modulation to Ql, Q2, accelerates electric current decline
Speed, but power component quantity is twice of " single tube modulation system " power drive, and dash current is big when two pipes synchronization on-off, line
Wave 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:
1) ± 15V power supply provides power supply for internal conditioning circuit；
2)+15V power supply provides power supply for metal-oxide-semiconductor driving chip, selects the technical grade DC/DC electricity of Guangzhou Jin Shengyang company
Source module VRA_YMD-6WR3 realization+24V arrives the conversion of ± 15V；
3)+5V power supply provides DC power supply for RS232 chip and internal conditioning circuit, selects Guangzhou Jin Shengyang company
Technical grade DC/DC power module F2405XT-2WR2 realization+24V arrives the conversion of+5V, and the modular peripheral interface unit is few, efficiency
Up to 84%；
3) high-voltage driving circuit, the high pressure for providing 24V for electromagnet guide power supply, directly take external power supply；
4)+24V provides the DC power supply of 24V for spool feedback transducer, by taking after filtering external power supply.
(6) input/output interface module
1) director demon downloading jtag interface connector is that 6 feet arrange needle；
2) controller RS232 bus communication interface connector is 4 foot toggle switch；
3) controller and displacement sensor interface connector are 4 foot toggle switch；
4) controller and proportion electro-magnet interface connector are 2 foot toggle switch；
5) controller and external signal interface connector are 10 foot toggle switch.
Closed-loop digital proportional valve controller of the invention is the core of proportioning valve, can replace traditional analog ratio
Example valve control.Its working principle is that: firstly, receiving host computer signal contrast example valve control by RS232 bus communication
Pid parameter is configured.Then, it receives external demand signal (0~± 10V) comparative example valve electromagnet to be controlled, makes ratio
Valve core movement, while collecting spool position feed back signal (4~20mA), move to ratio valve core according to control instruction and want
The position asked.The input terminal of controller is the position feed back signal of external control signal and proportioning valve, passes through control unit algorithm
Output pwm signal is applied to the electromagnet of proportioning valve, and the position-force control of proportioning valve, the present invention are realized by electricity-liquid conversion
The proportioning valve highest dynamic used arrange in pairs or groups up to 60Hz.
Claims (5)
1. a kind of Single electromagnet proportional valve controller based on current automatic adaptation, which is characterized in that including RS232 conversion circuit,
Signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface module and control unit；The RS232 turns
Circuit, signal conditioning circuit, power driving circuit, power-switching circuit, input/output interface module is changed to connect with control unit
It connects；The parameter that RS232 conversion circuit receives host computer signal contrast example valve control is configured；Signal conditioning circuit receives outer
Portion's voltage command signal, and the displacement of ratio valve core and the magnitude of current of electromagnet are acquired, pass through the proportioning valve of control unit
Two ring closed loop control algorithms of position ring and electric current loop generate pwm control signal；Power driving circuit is used for reception control unit
The PWM command signal of sending carries out power amplification to pwm signal, drives proportion electro-magnet.
2. the Single electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, which is characterized in that control
Unit chip uses the dspic30F3013 model single-chip microcontroller of Microchip company.
3. the Single electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, which is characterized in that
RS232 conversion circuit selects T1IN, R1OUT of RS232 protocol chip SP3232EE, the SP3232EE chip of SIPEX company to draw
Foot is connected with U1ATX, U1ART of control unit.
4. the Single electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, which is characterized in that signal
Conditioning circuit is for converting the analog signal for needing to acquire to control unit claimed range.
5. the Single electromagnet proportional valve controller according to claim 1 based on current automatic adaptation, which is characterized in that power supply
Conversion 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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| CN201811437122.1A CN109599246A (en) | 2018-11-28 | 2018-11-28 | A kind of Single electromagnet proportional valve controller based on current automatic adaptation |
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| CN201811437122.1A CN109599246A (en) | 2018-11-28 | 2018-11-28 | A kind of Single electromagnet proportional valve controller based on current automatic adaptation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195796A (en) * | 2019-05-13 | 2019-09-03 | 深圳国器实业有限公司 | A kind of electro-hydraulic proportional valve intelligence control system |
| CN111190376A (en) * | 2020-02-21 | 2020-05-22 | 山东省计算中心（国家超级计算济南中心） | Proportional valve driving circuit suitable for agricultural machinery ECU and control method |
| CN111462976A (en) * | 2020-05-07 | 2020-07-28 | 浙江桃园智能科技有限公司 | Electromagnet driving circuit |
| CN112324735A (en) * | 2020-11-06 | 2021-02-05 | 南京工程学院 | High-frequency-response servo proportional valve position control method |
| CN114458660A (en) * | 2021-12-24 | 2022-05-10 | 江苏徐工工程机械研究院有限公司 | Control system and control method for electric control bus hydraulic valve |
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| CN106402456A (en) * | 2016-10-20 | 2017-02-15 | 北京精密机电控制设备研究所 | Circuit and method for controlling hydraulic valve flow |
| US20180328514A1 (en) * | 2017-05-12 | 2018-11-15 | Denso Corporation | Current control circuit |
| CN208999803U (en) * | 2018-11-28 | 2019-06-18 | 南京晨光集团有限责任公司 | A kind of Single electromagnet proportional valve controller based on current automatic adaptation |
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Patent Citations (4)
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| CN201688004U (en) * | 2010-05-18 | 2010-12-29 | 无锡和晶科技股份有限公司 | Proportional valve control and feedback circuit of gas water heater |
| CN106402456A (en) * | 2016-10-20 | 2017-02-15 | 北京精密机电控制设备研究所 | Circuit and method for controlling hydraulic valve flow |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110195796A (en) * | 2019-05-13 | 2019-09-03 | 深圳国器实业有限公司 | A kind of electro-hydraulic proportional valve intelligence control system |
| CN111190376A (en) * | 2020-02-21 | 2020-05-22 | 山东省计算中心（国家超级计算济南中心） | Proportional valve driving circuit suitable for agricultural machinery ECU and control method |
| CN111462976A (en) * | 2020-05-07 | 2020-07-28 | 浙江桃园智能科技有限公司 | Electromagnet driving circuit |
| CN112324735A (en) * | 2020-11-06 | 2021-02-05 | 南京工程学院 | High-frequency-response servo proportional valve position control method |
| CN114458660A (en) * | 2021-12-24 | 2022-05-10 | 江苏徐工工程机械研究院有限公司 | Control system and control method for electric control bus hydraulic valve |
| CN114458660B (en) * | 2021-12-24 | 2024-04-02 | 江苏徐工工程机械研究院有限公司 | Control system and control method for electric control bus hydraulic valve |
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Application publication date: 20190409 |