WO2013056429A1 - Control system for controlling solenoid valve and control method thereof - Google Patents

Control system for controlling solenoid valve and control method thereof Download PDF

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Publication number
WO2013056429A1
WO2013056429A1 PCT/CN2011/080952 CN2011080952W WO2013056429A1 WO 2013056429 A1 WO2013056429 A1 WO 2013056429A1 CN 2011080952 W CN2011080952 W CN 2011080952W WO 2013056429 A1 WO2013056429 A1 WO 2013056429A1
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Prior art keywords
control
electromagnetic coil
effective value
controlling
spool
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PCT/CN2011/080952
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French (fr)
Chinese (zh)
Inventor
詹纯新
刘权
黎鑫溢
郭纪梅
Original Assignee
中联重科股份有限公司
湖南中联重科专用车有限责任公司
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Priority to PCT/CN2011/080952 priority Critical patent/WO2013056429A1/en
Publication of WO2013056429A1 publication Critical patent/WO2013056429A1/en

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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
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor

Definitions

  • the present invention relates to the field of control of electronic circuits, and more particularly to a control system and control method for controlling a solenoid valve. Background technique
  • the pulse width modulation (PWM) output of the controller is directly connected to the solenoid of the electro-hydraulic valve, and the duty cycle of the PWM output is adjusted to change the action on the electro-hydraulic valve.
  • the effective value of the current on the electromagnetic coil thereby adjusting the flow rate by controlling the displacement of the electrohydraulic valve spool.
  • the displacement or thrust of the spool of the electrohydraulic valve is proportional to the effective value of the current flowing through the solenoid. If the current is fixed, the position of the spool is also fixed, so that when the current is changed, the spool can overcome the static friction to start from the stationary state, so the so-called "viscous" effect is generated, which increases the hysteresis and reduces Response speed and sensitivity. Therefore, it is usually necessary to add a dither signal to the control signal of the controller to apply a small vibration to the valve core to keep it vibrating, and to convert the static friction into dynamic friction, thereby improving the response speed and response sensitivity and reducing the hysteresis.
  • FIG. 1 (a) shows no flutter The functional PWM waveform (solid line) and the actual current I (dashed line) generated on the electromagnet coil, wherein the PWM waveform has a period of f and a duty cycle of 50%.
  • the figure also shows the effective current IEFF of the electromagnet coil.
  • Figure 1 (b) shows the principle of flutter by changing the duty cycle of the PWM output waveform.
  • Figure 1 (b) where the duty cycle of the first 4 PWM waveforms is 60%, and the duty ratio of the last 4 PWM waveforms is 40. %, so that the amplitude of the effective current IEFF on the electromagnetic coil is changed to 10%, and the frequency change is 1/8 times the PWM frequency change, thus generating a flutter.
  • the coil current will exhibit a certain amplitude drop and rise in the periodic transition region adjacent to the PWM waveform (see Figure lb). ), that is, the flutter is essentially the parasitic ripple of the coil current. Therefore, the dither signal is coupled with the PWM control signal.
  • the amplitude and frequency of the dither signal are affected by the PWM signal and the coil inductance. Therefore, it is difficult to find a suitable PWM signal frequency to take into account the effective value of the coil current.
  • the dither signal and it is also difficult to achieve an independent adjustment between the effective value of the coil current and the amplitude and frequency of the flutter. Summary of the invention
  • the present invention is directed to the difficulty in finding a suitable PWM signal frequency in the prior art to balance the effective value of the coil current with the dither signal and the difficulty in achieving independent adjustment between the effective value of the coil current and the amplitude and frequency of the flutter.
  • a control system and control method for controlling a solenoid valve capable of overcoming the above drawbacks.
  • the present invention provides a control system for controlling a solenoid valve, the solenoid valve including an electromagnetic coil and a spool, the control system including a signal generator, wherein the signal generator generates two independent control signals and passes the signal Two different output terminals of the generator output the two independent control signals to the electromagnetic coil, one of the control signals for controlling an effective value of current on the electromagnetic coil, and the other of the controls The signal is used to cause chattering of the spool.
  • the invention also provides a control method for controlling a solenoid valve, the solenoid valve comprising an electromagnetic coil and a valve core, the method comprising: Generating two independent control signals, one of which is for controlling an effective value of current on the electromagnetic coil, and the other of the control signals for causing chattering of the spool;
  • the two separate control signals are communicated to the electromagnetic coil.
  • control system and the control method according to the present invention provide two independent control signals to the electromagnetic coil, that is, a control signal for controlling the effective value of the current on the electromagnetic coil and a control signal for causing chatter vibration of the spool, Therefore, the control system and the control method according to the present invention can achieve independent adjustment between the effective value of the coil current and the amplitude and frequency of the flutter, and can easily find a suitable control signal frequency to take into account the effective value of the coil current and the flutter. signal.
  • Figure la shows a PWM waveform without a dither function (solid line) and Figure lb generated on the electromagnetic coil shows the current on the electromagnetic coil after changing the duty cycle of the PWM waveform;
  • Figure 2 is a diagram in accordance with the present invention A control system for controlling a solenoid valve of an embodiment
  • FIG. 3 is a control system for controlling a solenoid valve according to another embodiment of the present invention.
  • the present invention provides a control system for controlling a solenoid valve, which includes an electromagnetic coil and a spool (the internal specific structure of the solenoid valve Y1 is not shown in detail), and the control system includes a signal generator 10, wherein the signal generator 10 generates two independent control signals, which are output through two different output terminals (ie, outl and out2) of the signal generator 10. And both are passed to the electromagnetic coil, one of the control signals for controlling the effective value of the current on the electromagnetic coil, and the other of the controls The signal is used to cause chattering of the spool. In this way, two separate control signals are applied to the solenoid, enabling separate adjustment of the solenoid current rms and spool flutter.
  • the control signal for controlling the effective value of the current on the electromagnetic coil is one of a square wave, a triangular wave, and a sine wave for causing chattering of the spool
  • the control signal is one of a square wave, a triangular wave, and a sine wave.
  • the two control signals can be set according to the effective value of the current of the electromagnetic coil and the requirement of the flutter of the valve core in the practical application, thereby realizing the independent adjustment of the electromagnetic coil current RMS and the valve core flutter by the present invention. purpose.
  • control signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are preferably square waves, for example, Pulse Width Modulation (PWM) wave.
  • PWM Pulse Width Modulation
  • the PWM signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are independent of each other, but the effective value of the latter may be 0.05 to 0.2 of the former effective value. In this way, the slight jitter of the spool can be achieved, thereby increasing the response speed of the solenoid valve and reducing the hysteresis.
  • the solenoid valve can refer to the electro-hydraulic proportional valve, electro-hydraulic servo valve, etc. commonly used in hydraulic systems, and can also refer to pneumatic proportional valves and pneumatic servo valves in the pneumatic transmission control system.
  • the control system for controlling the solenoid valve according to the present invention can control any type of solenoid valve that is electromagnetically controlled and that needs to generate chatter vibration of the spool to improve the response speed and reduce the hysteresis.
  • the electromagnetics of the two different output terminals out1 and out2 of the signal generator 10 and the electromagnet Y1 Diodes D1 and D2 are respectively connected between the coils, wherein the anode of the diode D1 is connected to the output terminal out1, and the anode of the diode D2 is connected to the output terminal out2.
  • the type of the diode can be selected according to the frequency of the control signal output by the signal generator 10, the magnitude of the loop current, etc.
  • the signal generator 10 is preferably a PLC controller.
  • the present invention also provides a control method for controlling a solenoid valve including an electromagnetic coil and a spool.
  • the control method of the control electromagnet according to the present invention includes:
  • the control signal for controlling the effective value of the current on the electromagnetic coil is one of a square wave, a triangular wave, and a sine wave for controlling the flutter of the spool
  • the control signal is one of a square wave, a triangular wave, and a sine wave.
  • the two control signals can be set according to the effective value of the current of the electromagnetic coil and the requirement of the flutter of the valve core in the practical application, thereby realizing the independent adjustment of the electromagnetic coil current RMS and the valve core flutter by the present invention. purpose.
  • control signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are preferably square waves, for example, Pulse Width Modulation (PWM) wave.
  • PWM Pulse Width Modulation
  • the PWM signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are independent of each other, but the effective value of the latter may be 0.05 to 0.2 of the former effective value. In this way, the slight jitter of the spool can be achieved, thereby increasing the response speed of the solenoid valve and reducing the hysteresis.
  • the solenoid valve can refer to the electro-hydraulic proportional valve, electro-hydraulic servo valve, etc. commonly used in hydraulic systems, and can also refer to pneumatic proportional valves and pneumatic servo valves in the pneumatic transmission control system.
  • the control system for controlling the solenoid valve according to the present invention can control any type of solenoid valve that is electromagnetically controlled and that needs to generate chatter vibration of the spool to improve the response speed and reduce the hysteresis.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

A control system and a control method for controlling a solenoid valve are provided. The solenoid includes a magnetic coil and a spool valve. The control system includes a signal generator (10) which produces two individual control signals and outputs two individual control signals to the magnetic coil via two different output terminals (out1, out2) of the signal generator (10). A control signal is used for controlling the effective value of current on the magnetic coil, while the other control signal is used for inducing the flutter of the spool valve.

Description

一种控制电磁阀的控制***与控制方法  Control system and control method for controlling electromagnetic valve
技术领域  Technical field
本发明涉及电子电路的控制领域， 尤其涉及一种控制电磁阀的控制系 统与控制方法。 背景技术  The present invention relates to the field of control of electronic circuits, and more particularly to a control system and control method for controlling a solenoid valve. Background technique
随着机电液一体化技术和产品的发展与开发， 电液阀的应用越来越广 泛。 在工程应用 （尤其是在工程机械） 中， 由控制器的脉宽调制 （PWM) 输出直接连接到电液阀的电磁线圈两端，通过调节 PWM输出的占空比来改 变作用在电液阀的电磁线圈上的电流的有效值， 从而通过控制电液阀阀芯 的位移量来调节流量。  With the development and development of electromechanical and hydraulic integration technologies and products, the application of electro-hydraulic valves has become more widespread. In engineering applications (especially in construction machinery), the pulse width modulation (PWM) output of the controller is directly connected to the solenoid of the electro-hydraulic valve, and the duty cycle of the PWM output is adjusted to change the action on the electro-hydraulic valve. The effective value of the current on the electromagnetic coil, thereby adjusting the flow rate by controlling the displacement of the electrohydraulic valve spool.
电液阀的阀芯的位移或推力正比于流经电磁线圈的电流的有效值。 若 该电流固定不变， 则阀芯位置也固定不动， 这样当改变电流时， 阀芯要克 服静摩擦才能从静止状态开始动作， 故产生所谓的 "粘滞"效应， 增大了 滞后， 降低了响应速度和灵敏度。 因此， 通常需要在控制器的控制信号中 加入颤振信号， 以给阀芯施加小幅振动， 使其始终处于振动状态， 将静摩 擦转换为动摩擦， 从而改善其响应速度和响应灵敏度， 减小滞后。  The displacement or thrust of the spool of the electrohydraulic valve is proportional to the effective value of the current flowing through the solenoid. If the current is fixed, the position of the spool is also fixed, so that when the current is changed, the spool can overcome the static friction to start from the stationary state, so the so-called "viscous" effect is generated, which increases the hysteresis and reduces Response speed and sensitivity. Therefore, it is usually necessary to add a dither signal to the control signal of the controller to apply a small vibration to the valve core to keep it vibrating, and to convert the static friction into dynamic friction, thereby improving the response speed and response sensitivity and reducing the hysteresis.
目前加入颤振的方法一般有两种。 一种是若控制器的 PWM输出本身 提供颤振功能，则可直接通过控制器的 PWM函数来设置 PWM输出的占空 比、 频率以及颤振的占空比、 频率等相关参数。 另一种是若控制器没有直 接提供颤振功能，则需要编制程序软件来以一定频率刻意改变 PWM输出的 占空比从而实现颤振功能。  There are currently two methods for adding chatter. One is that if the PWM output of the controller itself provides the flutter function, the duty cycle of the PWM output, the frequency, and the duty cycle and frequency of the flutter can be set directly through the PWM function of the controller. The other is that if the controller does not provide the flutter function directly, you need to program the software to deliberately change the duty cycle of the PWM output at a certain frequency to achieve the flutter function.
这两种方法的本质都是以一定频率改变 PWM输出波形的占空比， 以 期通过 PWM波形占空比的周期变化来实现颤振。 图 1 (a) 示出了无颤振 功能的 PWM波形 （实线） 以及电磁铁线圈上产生的实际电流 I (虚线）， 其中 PWM波形的周期为 f、 占空比为 50%, 图中还示出了电磁铁线圈的有 效电流 IEFF。 通过改变 PWM输出波形的占空比来实现颤振的原理如图 1 (b) 所示， 其中， 前 4个 PWM波形的占空比为 60%, 后 4个 PWM波形 的占空比为 40%，从而使得电磁线圈上的有效电流 IEFF的幅值变化为 10%、 频率变化为 1/8倍的 PWM频率变化， 这样就产生了颤振作用。 The essence of these two methods is to change the duty cycle of the PWM output waveform at a certain frequency, in order to achieve flutter through the periodic variation of the duty cycle of the PWM waveform. Figure 1 (a) shows no flutter The functional PWM waveform (solid line) and the actual current I (dashed line) generated on the electromagnet coil, wherein the PWM waveform has a period of f and a duty cycle of 50%. The figure also shows the effective current IEFF of the electromagnet coil. . The principle of flutter by changing the duty cycle of the PWM output waveform is shown in Figure 1 (b), where the duty cycle of the first 4 PWM waveforms is 60%, and the duty ratio of the last 4 PWM waveforms is 40. %, so that the amplitude of the effective current IEFF on the electromagnetic coil is changed to 10%, and the frequency change is 1/8 times the PWM frequency change, thus generating a flutter.
从电气角度分析， 由于电磁线圈的电感特性， 所以在改变 PWM输出 波形的占空比或频率时，线圈电流会在临近 PWM波形的周期过渡区域表现 为一定幅值的下降和上升（见图 lb),即颤振本质上是线圈电流的寄生紋波。 因此，颤振信号与 PWM控制信号是耦合在一起的，颤振信号的幅值和频率 受 PWM信号和线圈电感的共同影响，所以很难找到合适的 PWM信号频率 来兼顾线圈电流的有效值和颤振信号， 而且也难以实现线圈电流的有效值 和颤振的幅度和频率之间的独立调节。 发明内容  From the electrical point of view, due to the inductance characteristics of the electromagnetic coil, when changing the duty cycle or frequency of the PWM output waveform, the coil current will exhibit a certain amplitude drop and rise in the periodic transition region adjacent to the PWM waveform (see Figure lb). ), that is, the flutter is essentially the parasitic ripple of the coil current. Therefore, the dither signal is coupled with the PWM control signal. The amplitude and frequency of the dither signal are affected by the PWM signal and the coil inductance. Therefore, it is difficult to find a suitable PWM signal frequency to take into account the effective value of the coil current. The dither signal, and it is also difficult to achieve an independent adjustment between the effective value of the coil current and the amplitude and frequency of the flutter. Summary of the invention
本发明针对现有技术中很难找到合适的 PWM信号频率来兼顾线圈电 流的有效值和颤振信号以及难以实现线圈电流的有效值和颤振的幅度和频 率之间的独立调节的缺陷， 提供一种能够克服上述缺陷的控制电磁阀的控 制***和控制方法。  The present invention is directed to the difficulty in finding a suitable PWM signal frequency in the prior art to balance the effective value of the coil current with the dither signal and the difficulty in achieving independent adjustment between the effective value of the coil current and the amplitude and frequency of the flutter. A control system and control method for controlling a solenoid valve capable of overcoming the above drawbacks.
本发明提供一种控制电磁阀的控制***， 该电磁阀包括电磁线圈和阀 芯， 该控制***包括信号发生器， 其中， 所述信号发生器产生两个独立的 控制信号， 并通过所述信号发生器的两个不同的输出端子将所述两个独立 的控制信号输出到所述电磁线圈， 其中一个所述控制信号用于控制所述电 磁线圈上的电流的有效值， 另一个所述控制信号用于引起所述阀芯的颤振。  The present invention provides a control system for controlling a solenoid valve, the solenoid valve including an electromagnetic coil and a spool, the control system including a signal generator, wherein the signal generator generates two independent control signals and passes the signal Two different output terminals of the generator output the two independent control signals to the electromagnetic coil, one of the control signals for controlling an effective value of current on the electromagnetic coil, and the other of the controls The signal is used to cause chattering of the spool.
本发明还提供一种控制电磁阀的控制方法， 该电磁阀包括电磁线圈和 阀芯， 该方法包括： 产生两个独立的控制信号， 其中一个所述控制信号用于控制所述电磁 线圈上的电流的有效值， 另一个所述控制信号用于引起所述阀芯的颤振； 以及 The invention also provides a control method for controlling a solenoid valve, the solenoid valve comprising an electromagnetic coil and a valve core, the method comprising: Generating two independent control signals, one of which is for controlling an effective value of current on the electromagnetic coil, and the other of the control signals for causing chattering of the spool;
将所述两个独立的控制信号传递到所述电磁线圈。  The two separate control signals are communicated to the electromagnetic coil.
由于根据本发明的控制***和控制方法向电磁线圈提供了两个独立的 控制信号， 即用于控制电磁线圈上的电流的有效值的控制信号以及用于引 起阀芯的颤振的控制信号， 所以根据本发明的控制***和控制方法能够实 现线圈电流的有效值和颤振的幅度和频率之间的独立调节， 并且能够容易 地找到合适的控制信号频率来兼顾线圈电流的有效值和颤振信号。 附图说明  Since the control system and the control method according to the present invention provide two independent control signals to the electromagnetic coil, that is, a control signal for controlling the effective value of the current on the electromagnetic coil and a control signal for causing chatter vibration of the spool, Therefore, the control system and the control method according to the present invention can achieve independent adjustment between the effective value of the coil current and the amplitude and frequency of the flutter, and can easily find a suitable control signal frequency to take into account the effective value of the coil current and the flutter. signal. DRAWINGS
图 la示出了无颤振功能的 PWM波形 （实线） 以及电磁线圈上产生的 图 lb示出了改变 PWM波形的占空比后的电磁线圈上的电流； 图 2是根据本发明一种实施方式的控制电磁阀的控制***；  Figure la shows a PWM waveform without a dither function (solid line) and Figure lb generated on the electromagnetic coil shows the current on the electromagnetic coil after changing the duty cycle of the PWM waveform; Figure 2 is a diagram in accordance with the present invention A control system for controlling a solenoid valve of an embodiment;
图 3是根据本发明另一实施方式的控制电磁阀的控制***；  3 is a control system for controlling a solenoid valve according to another embodiment of the present invention;
图 4是根据本发明一种实施方式的控制电磁阀的控制方法。 具体实施方式  4 is a control method of a control solenoid valve according to an embodiment of the present invention. detailed description
下面结合附图来详细描述根据本发明的控制***和控制方法。  The control system and control method according to the present invention will be described in detail below with reference to the accompanying drawings.
首先， 如图 2所示， 本发明提供一种控制电磁阀的控制***， 该电磁 阀 Y1包括电磁线圈和阀芯 （图中未详细示出电磁阀 Y1的内部具体结构）， 该控制***包括信号发生器 10， 其中， 所述信号发生器 10产生两个独立的 控制信号， 所述两个独立的控制信号通过所述信号发生器 10的两个不同的 输出端子 （即 outl和 out2) 输出并且都被传递到所述电磁线圈， 其中一个 所述控制信号用于控制所述电磁线圈上的电流的有效值， 另一个所述控制 信号用于引起所述阀芯的颤振。 这样， 两个独立的控制信号就施加到了电 磁线圈上， 使得能够实现电磁线圈电流有效值与阀芯颤振的单独调节。 First, as shown in FIG. 2, the present invention provides a control system for controlling a solenoid valve, which includes an electromagnetic coil and a spool (the internal specific structure of the solenoid valve Y1 is not shown in detail), and the control system includes a signal generator 10, wherein the signal generator 10 generates two independent control signals, which are output through two different output terminals (ie, outl and out2) of the signal generator 10. And both are passed to the electromagnetic coil, one of the control signals for controlling the effective value of the current on the electromagnetic coil, and the other of the controls The signal is used to cause chattering of the spool. In this way, two separate control signals are applied to the solenoid, enabling separate adjustment of the solenoid current rms and spool flutter.
在根据本发明的一个优选实施方式中， 用于控制所述电磁线圈上的电 流的有效值的控制信号为方波、 三角波、 正弦波中的一种， 用于引起所述 阀芯的颤振的控制信号为方波、 三角波、 正弦波中的一种。 其中， 可以根 据实际应用中对电磁线圈的电流的有效值以及阀芯的颤振的要求来设置这 两个控制信号， 从而实现了本发明对电磁线圈电流有效值和阀芯颤振独立 调节的目的。  In a preferred embodiment according to the present invention, the control signal for controlling the effective value of the current on the electromagnetic coil is one of a square wave, a triangular wave, and a sine wave for causing chattering of the spool The control signal is one of a square wave, a triangular wave, and a sine wave. Wherein, the two control signals can be set according to the effective value of the current of the electromagnetic coil and the requirement of the flutter of the valve core in the practical application, thereby realizing the independent adjustment of the electromagnetic coil current RMS and the valve core flutter by the present invention. purpose.
在根据本发明的另一优选实施方式中， 用于控制所述电磁线圈上的电 流的有效值的控制信号和用于引起所述阀芯的颤振的控制信号均优选为方 波， 例如， 脉冲宽度调制 （PWM) 波。 而且， 用于控制所述电磁线圈上的 电流的有效值的 PWM信号与用于引起阀芯的颤振的控制信号彼此独立，但 是， 后者的有效值可以为前者的有效值的 0.05至 0.2倍， 这样就可以实现 阀芯的微小抖动， 从而增加电磁阀的响应速度、 降低滞后。 本文中， 电磁 阀可以指的是液压***中常用的电液比例阀、 电液伺服阀等， 也可以指的 是气压传动控制***中的气动比例阀、 气动伺服阀等。 总之， 根据本发明 的控制电磁阀的控制***可以对通过电磁方式控制的、 在操作中需要产生 阀芯的颤振以改善响应速度并降低滞后的任意类型的电磁阀进行控制。  In another preferred embodiment according to the present invention, the control signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are preferably square waves, for example, Pulse Width Modulation (PWM) wave. Moreover, the PWM signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are independent of each other, but the effective value of the latter may be 0.05 to 0.2 of the former effective value. In this way, the slight jitter of the spool can be achieved, thereby increasing the response speed of the solenoid valve and reducing the hysteresis. In this paper, the solenoid valve can refer to the electro-hydraulic proportional valve, electro-hydraulic servo valve, etc. commonly used in hydraulic systems, and can also refer to pneumatic proportional valves and pneumatic servo valves in the pneumatic transmission control system. In summary, the control system for controlling the solenoid valve according to the present invention can control any type of solenoid valve that is electromagnetically controlled and that needs to generate chatter vibration of the spool to improve the response speed and reduce the hysteresis.
另外， 为了避免信号发生器 10输出的两路控制信号的相互影响， 在根 据本发明的又一优选实施方式中， 在信号发生器 10 的两个不同输出端子 outl和 out2与电磁铁 Y1的电磁线圈之间分别连接有二极管 D1和 D2 (如 图 3所示）， 其中二极管 D1的正极连接到输出端子 outl , 二极管 D2的正 极连接到输出端子 out2。 可以根据信号发生器 10输出的控制信号的频率、 回路电流的大小等来选择二极管的类型， 信号发生器 10输出的控制信号的 频率越高， 所选二极管的工作频率就应当越大， 回路电流越大， 则所选二 极管的额定电流就越大。 在上面的描述中， 信号发生器 10优选为 PLC控制器。 In addition, in order to avoid the mutual influence of the two control signals output by the signal generator 10, in a further preferred embodiment according to the present invention, the electromagnetics of the two different output terminals out1 and out2 of the signal generator 10 and the electromagnet Y1 Diodes D1 and D2 (shown in FIG. 3) are respectively connected between the coils, wherein the anode of the diode D1 is connected to the output terminal out1, and the anode of the diode D2 is connected to the output terminal out2. The type of the diode can be selected according to the frequency of the control signal output by the signal generator 10, the magnitude of the loop current, etc. The higher the frequency of the control signal output by the signal generator 10, the larger the operating frequency of the selected diode should be, and the loop current The larger the diode, the greater the rated current of the selected diode. In the above description, the signal generator 10 is preferably a PLC controller.
本发明还提供了一种控制电磁阀的控制方法， 该电磁阀包括电磁线圈 和阀芯。 如图 4所示， 根据本发明的控制电磁铁的控制方法包括：  The present invention also provides a control method for controlling a solenoid valve including an electromagnetic coil and a spool. As shown in FIG. 4, the control method of the control electromagnet according to the present invention includes:
541、 产生两个独立的控制信号， 其中一个所述控制信号用于控制所述 电磁线圈上的电流的有效值， 另一个所述控制信号用于引起所述阀芯的颤 振。  541. Generate two independent control signals, one of the control signals for controlling an effective value of a current on the electromagnetic coil, and the other of the control signals for causing chattering of the spool.
在根据本发明的一个优选实施方式中， 用于控制所述电磁线圈上的电 流的有效值的控制信号为方波、 三角波、 正弦波中的一种， 用于控制所述 阀芯的颤振的控制信号为方波、 三角波、 正弦波中的一种。 其中， 可以根 据实际应用中对电磁线圈的电流的有效值以及阀芯的颤振的要求来设置这 两个控制信号， 从而实现了本发明对电磁线圈电流有效值和阀芯颤振独立 调节的目的。  In a preferred embodiment according to the present invention, the control signal for controlling the effective value of the current on the electromagnetic coil is one of a square wave, a triangular wave, and a sine wave for controlling the flutter of the spool The control signal is one of a square wave, a triangular wave, and a sine wave. Wherein, the two control signals can be set according to the effective value of the current of the electromagnetic coil and the requirement of the flutter of the valve core in the practical application, thereby realizing the independent adjustment of the electromagnetic coil current RMS and the valve core flutter by the present invention. purpose.
在根据本发明的另一优选实施方式中， 用于控制所述电磁线圈上的电 流的有效值的控制信号和用于引起所述阀芯的颤振的控制信号均优选为方 波， 例如， 脉冲宽度调制 （PWM) 波。 而且， 用于控制所述电磁线圈上的 电流的有效值的 PWM信号与用于引起阀芯的颤振的控制信号彼此独立，但 是， 后者的有效值可以为前者的有效值的 0.05至 0.2倍， 这样就可以实现 阀芯的微小抖动， 从而增加电磁阀的响应速度、 降低滞后。 本文中， 电磁 阀可以指的是液压***中常用的电液比例阀、 电液伺服阀等， 也可以指的 是气压传动控制***中的气动比例阀、 气动伺服阀等。 总之， 根据本发明 的控制电磁阀的控制***可以对通过电磁方式控制的、 在操作中需要产生 阀芯的颤振以改善响应速度并降低滞后的任意类型的电磁阀进行控制。  In another preferred embodiment according to the present invention, the control signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are preferably square waves, for example, Pulse Width Modulation (PWM) wave. Moreover, the PWM signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chattering of the spool are independent of each other, but the effective value of the latter may be 0.05 to 0.2 of the former effective value. In this way, the slight jitter of the spool can be achieved, thereby increasing the response speed of the solenoid valve and reducing the hysteresis. In this paper, the solenoid valve can refer to the electro-hydraulic proportional valve, electro-hydraulic servo valve, etc. commonly used in hydraulic systems, and can also refer to pneumatic proportional valves and pneumatic servo valves in the pneumatic transmission control system. In summary, the control system for controlling the solenoid valve according to the present invention can control any type of solenoid valve that is electromagnetically controlled and that needs to generate chatter vibration of the spool to improve the response speed and reduce the hysteresis.
542、 将所述两个独立的控制信号传递到所述电磁线圈。  542. Transfer the two independent control signals to the electromagnetic coil.
以上结合本发明的优选实施方式对本发明进行了详细描述， 但是在不 背离本发明精神和范围的情况下， 本领域技术人员可以对本发明进行各种 变形和修改。  The present invention has been described in detail above with reference to the preferred embodiments of the present invention, and various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1、 一种控制电磁阀的控制***， 该电磁阀包括电磁线圈和阀芯， 该控 制***包括信号发生器， 其中， 所述信号发生器产生两个独立的控制信号， 并通过所述信号发生器的两个不同的输出端子将所述两个独立的控制信号 输出到所述电磁线圈， 其中一个所述控制信号用于控制所述电磁线圈上的 电流的有效值， 另一个所述控制信号用于引起所述阀芯的颤振。  What is claimed is: 1. A control system for controlling a solenoid valve, the solenoid valve comprising an electromagnetic coil and a spool, the control system comprising a signal generator, wherein the signal generator generates two independent control signals and generates by the signal Two different output terminals of the device output the two independent control signals to the electromagnetic coil, one of the control signals for controlling an effective value of a current on the electromagnetic coil, and the other of the control signals Used to cause chattering of the spool.
2、 根据权利要求 1所述的控制***， 其中， 用于控制所述电磁线圈上 的电流的有效值的控制信号和用于引起所述阀芯的颤振的控制信号均为方 波。 The control system according to claim 1, wherein the control signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chatter of the spool are square waves.
3、 根据权利要求 2所述的控制***， 其中， 用于控制所述电磁线圈上 的电流的有效值的控制信号与用于引起所述阀芯的颤振的控制信号的周期 和幅值相互独立， 并且用于引起所述阀芯的颤振的控制信号的有效值为用 于控制所述电磁线圈上的电流的有效值的控制信号的有效值的 0.05 至 0.2 倍。 3. The control system according to claim 2, wherein a control signal for controlling an effective value of a current on the electromagnetic coil and a period and a magnitude of a control signal for causing chattering of the spool are mutually Independent, and the effective value of the control signal for causing chattering of the spool is 0.05 to 0.2 times the effective value of the control signal for controlling the effective value of the current on the solenoid.
4、 根据权利要求 1至 3中任一项权利要求所述的控制***， 其中， 在 所述两个不同的输出端子与所述电磁线圈之间分别连接有二极管， 并且各 个所述二极管的负极与所述电磁线圈连接。 The control system according to any one of claims 1 to 3, wherein a diode is connected between the two different output terminals and the electromagnetic coil, and a negative electrode of each of the diodes Connected to the electromagnetic coil.
5、 根据权利要求 1至 3中任一项权利要求所述的控制***， 其中， 所 述信号发生器为控制器。 A control system according to any one of claims 1 to 3, wherein the signal generator is a controller.
6、 一种控制电磁阀的控制方法， 该电磁阀包括电磁线圈和阀芯， 该方 法包括： 产生两个独立的控制信号， 其中一个所述控制信号用于控制所述电磁 线圈上的电流的有效值， 另一个所述控制信号用于引起所述阀芯的颤振； 以及 6. A control method for controlling a solenoid valve, the solenoid valve comprising an electromagnetic coil and a spool, the method comprising: Generating two independent control signals, one of which is for controlling an effective value of current on the electromagnetic coil, and the other of the control signals for causing chattering of the spool;
将所述两个独立的控制信号传递到所述电磁线圈。  The two separate control signals are communicated to the electromagnetic coil.
7、 根据权利要求 6所述的控制方法， 其中， 用于控制所述电磁线圈上 的电流的有效值的控制信号和用于引起所述阀芯的颤振的控制信号均为方 波。 The control method according to claim 6, wherein the control signal for controlling the effective value of the current on the electromagnetic coil and the control signal for causing the chatter of the spool are square waves.
8、 根据权利要求 7所述的控制方法， 其中， 用于控制所述电磁线圈上 的电流的有效值的控制信号与用于引起所述阀芯的颤振的控制信号的周期 和幅值相互独立， 并且用于引起所述阀芯的颤振的控制信号的有效值为用 于控制所述电磁线圈上的电流的有效值的控制信号的有效值的 0.05 至 0.2 倍。 8. The control method according to claim 7, wherein a control signal for controlling an effective value of a current on the electromagnetic coil and a period and a magnitude of a control signal for causing chattering of the spool are mutually Independent, and the effective value of the control signal for causing chattering of the spool is 0.05 to 0.2 times the effective value of the control signal for controlling the effective value of the current on the solenoid.
PCT/CN2011/080952 2011-10-18 2011-10-18 Control system for controlling solenoid valve and control method thereof WO2013056429A1 (en)

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