KR101163390B1 - Apparatus to control current of solenoid for PWM operation - Google Patents

Apparatus to control current of solenoid for PWM operation Download PDF

Info

Publication number
KR101163390B1
KR101163390B1 KR1020060036663A KR20060036663A KR101163390B1 KR 101163390 B1 KR101163390 B1 KR 101163390B1 KR 1020060036663 A KR1020060036663 A KR 1020060036663A KR 20060036663 A KR20060036663 A KR 20060036663A KR 101163390 B1 KR101163390 B1 KR 101163390B1
Authority
KR
South Korea
Prior art keywords
solenoid
current
voltage
field effect
control
Prior art date
Application number
KR1020060036663A
Other languages
Korean (ko)
Other versions
KR20070104981A (en
Inventor
김관식
Original Assignee
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020060036663A priority Critical patent/KR101163390B1/en
Publication of KR20070104981A publication Critical patent/KR20070104981A/en
Application granted granted Critical
Publication of KR101163390B1 publication Critical patent/KR101163390B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/665—Electrical control in fluid-pressure brake systems the systems being specially adapted for transferring two or more command signals, e.g. railway systems
    • B60T13/667—Electrical control in fluid-pressure brake systems the systems being specially adapted for transferring two or more command signals, e.g. railway systems and combined with electro-magnetic brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • 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
    • 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
    • H01F7/16—Rectilinearly-movable armatures

Landscapes

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

Abstract

본 발명은 펄스폭변조 방식의 유압밸브 구동용 솔레노이드의 전류제어장치에 관한 것으로, 솔레노이드에 흐르는 전류를 실시간으로 측정하는데 있어서 전류측정 시 발생할 수 있는 저항값의 오차를 보상하여 PWM 듀티비를 제어함으로서 원하는 제어성능을 확보하도록 하는데 그 목적이 있다.

이를 위해 본 발명은, 플라이백 다이오드 보호회로를 갖춘 드라이버의 PWM 구동에 따라 밸브를 구동시키는 솔레노이드에 있어서, 상기 솔레노이드에 연결되어 솔레노이드에 흐르는 전류를 실시간으로 측정하는 전류측정부; 및 상기 전류측정부에서 측정된 전류값을 입력받아 전류측정 시 발생하는 저항값의 오차를 보상하여 PWM 듀티비를 제어하는 제어부를 포함하는 것이다.

Figure R1020060036663

The present invention relates to a current control device for a solenoid for driving a hydraulic valve of a pulse width modulation method. The purpose is to ensure the desired control performance.

To this end, the present invention, the solenoid for driving the valve in accordance with the PWM drive of the driver having a flyback diode protection circuit, the current measuring unit connected to the solenoid to measure the current flowing in the solenoid in real time; And a controller configured to control the PWM duty ratio by receiving a current value measured by the current measuring unit and compensating for an error of a resistance value generated during current measurement.

Figure R1020060036663

Description

펄스폭변조 구동용 솔레노이드의 전류제어장치{Apparatus to control current of solenoid for PWM operation}Current control device for solenoid for pulse width modulation driving {Apparatus to control current of solenoid for PWM operation}

도 1은 종래에 의한 솔레노이드의 펄스폭변조 구동회로도,1 is a pulse width modulation driving circuit diagram of a conventional solenoid;

도 2는 본 발명에 의한 솔레노이드 전류제어장치의 펄스폭변조 구동회로도.Figure 2 is a pulse width modulation drive circuit diagram of a solenoid current control device according to the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *    Explanation of symbols on the main parts of the drawings

10 : 솔레노이드 20 : 제어부10: solenoid 20: control unit

30 : 드라이버 40 : 기준전원공급부30: driver 40: reference power supply

50 : 전류측정부50: current measuring unit

본 발명은 펄스폭변조(PWM) 방식의 유압밸브 구동용 솔레노이드에 관한 것으로, 특히 솔레노이드의 전류변화에 따라 듀티비를 제어하여 원하는 제어성능을 확보하는 펄스폭변조 구동용 솔레노이드의 전류제어장치에 관한 것이다.The present invention relates to a pulse width modulated (PWM) type solenoid for driving a hydraulic valve, and more particularly, to a current control device for a pulse width modulated driving solenoid for controlling a duty ratio according to a change in current of a solenoid to secure a desired control performance. will be.

일반적으로 자동차 전자제어시스템(ECU)은 솔레노이드나 모터 등과 같은 외부 로드(load)를 구동하여 원하는 출력을 얻는다. 이중에서 유압밸브(Hydraulic Unit Valve) 등을 구동하는 솔레노이드는 등가적으로 볼 때 저항(R)과 인덕턴스(L) 의 연결로 생각할 수 있으며, 솔레노이드에 발생되는 자기장(Magnetic Force)은 솔레노이드에 흐르는 전류에 비례한다. 따라서 밸브에 작용하는 자기장도 전류에 비례한다고 볼 수 있다.In general, an automotive electronic control system (ECU) drives an external load such as a solenoid or a motor to obtain a desired output. Among them, the solenoid driving the hydraulic unit valve, etc. can be considered as the connection between the resistance (R) and the inductance (L), and the magnetic field generated in the solenoid is the current flowing through the solenoid. Proportional to Therefore, the magnetic field acting on the valve is also proportional to the current.

종래에는, 이러한 밸브의 솔레노이드 전류제어를 위해 플라이백 다이오드(Flyback Diode 또는 Free-Wheeling Diode) 보호회로를 갖춘 드라이버를 펄스폭변조(이하, PWM이라 한다) 구동하는 방식이 도 1에 도시한 바와 같이, 제안되었다.Conventionally, a method of driving a pulse width modulation (hereinafter referred to as PWM) driver with a flyback diode (Flyback Diode or Free-Wheeling Diode) protection circuit for controlling solenoid current of such a valve is shown in FIG. , Was proposed.

도 1을 참조하면, 저항(Rc) 및 코일(Lc)로 구성된 솔레노이드(10)에 보호용 및 제어용 전계효과 트랜지스터(FET1, FET2)가 연결되어 제어부(20)에서 드라이버(30)를 통해 보호용 전계효과 트랜지스터(FET1)를 온한 상태에서 제어부(20)의 PWM 구동신호에 따라 제어용 전계효과 트랜지스터(FET2)를 단순히 ON 또는 OFF하는 방식으로 솔레노이드(10)의 동작을 제어하였다.Referring to FIG. 1, protective and control field effect transistors FET1 and FET2 are connected to a solenoid 10 composed of a resistor Rc and a coil Lc and a protective field effect through a driver 30 in the controller 20. The operation of the solenoid 10 is controlled by simply turning on or off the control field effect transistor FET2 according to the PWM driving signal of the controller 20 while the transistor FET1 is turned on.

또한, 상기 솔레노이드(10)의 전류제어를 위한 PWM 동작특성을 고려하여 솔레노이드(10)에 플라이백 다이오드(D2)를 병렬로 연결한 보호회로를 구성하였다.In addition, in consideration of the PWM operation characteristics for controlling the current of the solenoid 10, a protection circuit in which a flyback diode D2 is connected to the solenoid 10 in parallel is configured.

이와 같이 구성된 종래 솔레노이드(10)의 PWM 구동회로에 있어서, 저항(Rc) 및 코일(Lc)로 구성된 솔레노이드(10)를 PWM 구동할 때, 저항(Rc) 및 코일(Lc)이 일정하면 전류는 PWM 듀티비(Duty Ratio)에 비례하므로 PWM 듀티비를 제어하여 밸브의 자기장을 선형적으로 제어하였다.In the PWM driving circuit of the conventional solenoid 10 configured as described above, when PWM driving the solenoid 10 composed of the resistor Rc and the coil Lc, the current is constant if the resistor Rc and the coil Lc are constant. Since it is proportional to the PWM duty ratio, the PWM magnetic field is linearly controlled by controlling the PWM duty ratio.

그런데, 저항(Rc)은 전류가 흐르면 전력을 소비하면서 발열하는 특성을 가지므로 이 경우 솔레노이드(10)의 저항값이 변화하면서 듀티비에 비례하는 자기장도 변화하게 되나, 종래에는 저항(Rc) 및 코일(Lc)이 일정할 때의 안정된 상태에서의 듀티비를 가지고 전류를 제어함으로써 저항변화에 따른 밸브 제어특성이 온도변화의 영향을 받아 정밀한 전류측정이 어렵고, 이는 제어성능이 저하되는 결과를 초래하였다.However, since the resistor Rc has a characteristic of generating heat while consuming power when current flows, in this case, the resistance value of the solenoid 10 changes, and the magnetic field proportional to the duty ratio also changes, but in the related art, the resistor Rc and By controlling the current with a duty ratio in a stable state when the coil Lc is constant, the valve control characteristic according to the resistance change is affected by the temperature change, making it difficult to accurately measure the current, which results in deterioration of the control performance. It was.

특히, ABS, ESP의 경우 솔레노이드를 적게는 8개에서부터 많게는 14개를 독립적으로 제어해야 하므로 여러 제어상황에 맞게 다양하고 세밀한 제어를 할 수가 없어 성능향상에 장애가 되었다.In particular, ABS and ESP have to control solenoids from as few as eight to as many as fourteen independently, which makes it difficult to improve performance due to the inability to control various and various control situations.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위해 안출된 것으로, 본 발명의 목적은 솔레노이드에 흐르는 전류를 실시간으로 측정하는데 있어서 전류측정 시 발생할 수 있는 저항값의 오차를 보상하여 PWM 듀티비를 제어함으로서 원하는 제어성능을 확보할 수 있는 펄스폭변조 구동용 솔레노이드의 전류제어장치를 제공하는데 있다.Accordingly, the present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to compensate for the error in the resistance value that may occur during current measurement in the current flowing through the solenoid PWM duty ratio It is to provide a current control device of the solenoid for pulse width modulation drive to ensure the desired control performance by controlling the.

상기 목적을 달성하기 위하여 본 발명은, 플라이백 다이오드 보호회로를 갖춘 드라이버의 PWM 구동에 따라 밸브를 구동시키는 솔레노이드에 있어서, 상기 솔레노이드에 연결되어 솔레노이드에 흐르는 전류를 실시간으로 측정하는 전류측정부; 및 상기 전류측정부에서 측정된 전류값을 입력받아 전류측정 시 발생하는 저항값의 오차를 보상하여 PWM 듀티비를 제어하는 제어부를 포함하는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a solenoid for driving a valve according to a PWM driving of a driver having a flyback diode protection circuit, comprising: a current measuring unit connected to the solenoid and measuring a current flowing in the solenoid in real time; And a controller configured to control the PWM duty ratio by receiving the current value measured by the current measuring unit and compensating for an error in the resistance value generated during the current measurement.

또한, 상기 전류측정부는 전류검출을 위한 션트저항(Rs)과, 상기 션트저항(Rs)에 의해 검출된 값을 평활화된 DC전압으로 분압하여 상기 제어부에 입력하는 저항(R1, R2), (R3, R4)을 포함하는 것을 특징으로 한다.The current measuring unit divides the shunt resistor Rs for current detection and the value detected by the shunt resistor Rs into a smoothed DC voltage and inputs the resistors R1 and R2 and R3 to the controller. , R4).

또한, 상기 제어부는 PWM 구동 시 상기 솔레노이드에 흐르는 전류를 측정할 때 발생하는 저항(R1, R2), (R3, R4) 값의 오차를 소프트웨어 방식으로 보상하는 것을 특징으로 한다.In addition, the controller is characterized in that for compensating for the error of the resistance (R1, R2), (R3, R4) value generated when measuring the current flowing through the solenoid during PWM driving by software method.

이하, 본 발명의 일실시예를 첨부된 도면을 참조하여 설명한다.Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명에 의한 솔레노이드 전류제어장치의 펄스폭변조 구동회로도로서, 솔레노이드(10), 보호용 및 제어용 전계효과 트랜지스터(FET1, FET2), 제어부(20), 드라이버(30), 기준전원공급부(40), 전류측정부(50), 플라이백 다이오드(D2)를 포함하며, 종래의 구성과 동일한 부분에 대해서는 동일부호를 병기한다.2 is a pulse width modulation driving circuit diagram of a solenoid current control device according to the present invention, which includes a solenoid 10, protection and control field effect transistors FET1 and FET2, a control unit 20, a driver 30, a reference power supply unit 40), the current measuring unit 50, and the flyback diode (D2), and the same reference numerals are given together for the same parts as the conventional configuration.

도 2에서, 상기 솔레노이드(10)는 유압밸브를 구동하기 위한 것으로, 등가적으로 볼 때 저항(Rc) 및 코일(Lc)로 구성된다.In FIG. 2, the solenoid 10 is configured to drive a hydraulic valve and, equivalently, includes a resistor Rc and a coil Lc.

상기 솔레노이드(10)에는 플라이백 다이오드(D2)가 병렬로 연결되어 있으며, 이 플라이백 다이오드(D2)는 상기 솔레노이드(10)의 전류제어를 위한 PWM 동작특성을 고려하여 보호회로를 구성한다.A flyback diode D2 is connected to the solenoid 10 in parallel, and the flyback diode D2 forms a protection circuit in consideration of the PWM operation characteristic for the current control of the solenoid 10.

상기 솔레노이드(10)에는 제어부(20)로부터 출력되는 PWM 구동신호에 따라 원하는 출력을 얻기 위해 ON/OFF되는 제어용 전계효과 트랜지스터(FET2)가 직렬로 연결되어 있으며, 이 제어용 전계효과 트랜지스터(FET2)는 PWM 듀티비에 비례하여 솔레노이드(10)에 흐르는 전류를 제어한다.The solenoid 10 is connected in series with a control field effect transistor FET2 that is turned on and off in order to obtain a desired output according to a PWM driving signal output from the control unit 20. The control field effect transistor FET2 is connected to the solenoid 10. The current flowing through the solenoid 10 is controlled in proportion to the PWM duty ratio.

또한, 상기 솔레노이드(10)에는 제어용 전계효과 트랜지스터(FET2)의 오동작 시 회로를 보호하기 위한 보호용 전계효과 트랜지스터(FET1)가 직렬로 연결되어 있으며, 이 보호용 전계효과 트랜지스터(FET1)는 제어부(20)로부터 출력되는 구동신호를 드라이버(30)를 통해 전달받아 ON/OFF 동작하며 배터리전원(VBAT)을 공급받는다.In addition, the solenoid 10 is connected in series with a protective field effect transistor FET1 for protecting a circuit when the control field effect transistor FET2 malfunctions. The protective field effect transistor FET1 is connected to the control unit 20. It receives the driving signal output from the driver 30 through the ON / OFF operation and receives the battery power (V BAT ).

또한, 상기 솔레노이드(10)에는 기준저항(Rref) 및 역출력 방지용 다이오드(D1)로 구성된 기준전원공급부(40)가 연결되어 기준전원(Vcc; 5V)을 공급받는다.In addition, the solenoid 10 is connected to a reference power supply 40 composed of a reference resistor Rref and a reverse output prevention diode D1 to receive a reference power supply Vcc (5V).

상기 보호용 전계효과 트랜지스터(FET1)와 솔레노이드(10) 사이에는 솔레노이드(10) 코일(Lc)에 흐르는 전류를 실시간으로 측정하기 위한 전류측정부(50)가 연결되어 있으며, 이 전류측정부(50)는 전류검출을 위한 션트저항(Rs)과, 상기 션트저항(Rs)에 의해 검출된 값에 포함된 노이즈성분을 제거하는 컨덴서(C1, C2)와, 상기 션트저항(Rs)에 의해 검출된 값을 평활화된 DC전압으로 분압하는 분압저항(R1, R2), (R3, R4)과, 상기 분압저항(R1, R2), (R3, R4)에 의해 평활화된 DC전압의 항복전압 이상만을 바이패스하여 상기 제어부(20)의 ADC단(ADC2, ADC3)에 일정전압을 입력하는 제너다이오드(ZD1, ZD2)를 포함한다.A current measuring unit 50 is connected between the protective field effect transistor FET1 and the solenoid 10 to measure the current flowing in the coil Lc of the solenoid 10 in real time. Is a shunt resistor (Rs) for current detection, capacitors (C1, C2) for removing noise components included in the value detected by the shunt resistor (Rs), and the value detected by the shunt resistor (Rs). Bypasses only the voltage divider resistors R1 and R2 and R3 and R4 for dividing the voltage into a smoothed DC voltage and the breakdown voltage of the DC voltage smoothed by the voltage divider resistors R1 and R2 and R4 and R4. And the Zener diodes ZD1 and ZD2 for inputting a predetermined voltage to the ADC terminals ADC2 and ADC3 of the controller 20.

본 발명은 상기 전류측정부(50)에서 솔레노이드(10) 코일(Lc)에 흐르는 전류를 실시간으로 측정할 때 발생할 수 있는 오차를 고려하여 정밀한 전류를 측정할수록 정밀한 제어성능을 낼 수 있도록 하였다.According to the present invention, in consideration of an error that may occur when the current flowing through the coil Lc of the solenoid 10 in the current measuring unit 50 is measured in real time, the more precise current is measured, the more precise control performance can be achieved.

전류측정시 발생할 수 있는 오차는 션트저항(Rs)과 ADC 허용오차(resolution)를 들 수 있으며, 이중에서 션트저항(Rs)의 오차(0.1Ω 션트저항 적 용 시 1mΩ 오차발생)는 아주 작기 때문에 심각하게 고려할 사항은 아니며 분압저항(R1, R2), (R3, R4)에 의한 저항값들의 허용오차와 온도에 따른 편차(온도편차는 무시 가능)이다.Errors that can occur during current measurement include shunt resistance (Rs) and ADC tolerance, and among them, the error of shunt resistance (Rs) (1mΩ error when applying 0.1Ω shunt resistor) is very small. It is not a serious consideration, but the tolerances of the resistance values due to the voltage divider (R1, R2) and (R3, R4) and the deviation with temperature (temperature deviation can be ignored).

저항값들의 오차를 보상하는 하나의 방법은 ±1% 또는 ±0.5% 저항을 사용해서 기본적으로 저항값의 편차를 줄이는 방법이 있으나, 이 방법은 성능향상을 위해 더 정밀한 저항값들을 적용 시 가격 상승 및 사이즈 증가의 문제가 발생하므로 어느 정도 한계가 있다.One method of compensating for the error in resistance values is to reduce the variation of resistance by using ± 1% or ± 0.5% resistance, but this method increases the price when applying more precise resistance values to improve performance. And there is a limit to some extent because of the problem of size increase.

따라서, 본 발명에서는 이러한 저항값들의 오차를 소프트웨어 방식으로 실측하여 계산하는 방법을 제안하였다.Therefore, the present invention has proposed a method of measuring and calculating the error of the resistance values by a software method.

먼저, 제어부(20)의 제어에 따라 보호용 및 제어용 전계효과 트랜지스터(FET1, FET2)를 오프한 상태에서 제어부(20)의 ADC단을 통해 AD1~AD3단의 값을 아래의 [식 1]과 같이 측정한다.First, under the control of the controller 20, the values of AD1 to AD3 stages are changed through the ADC stage of the controller 20 in the state in which the protective and control field effect transistors FET1 and FET2 are turned off, as shown in Equation 1 below. Measure

AD2_전압 = AD1_전압ㅧ[R2/(R1+R2)]AD2_voltage = AD1_voltage ㅧ [R2 / (R1 + R2)]

AD3_전압 = AD1_전압ㅧ[R4/(R3+R4)] ..... [식 1]AD3_voltage = AD1_voltage ㅧ [R4 / (R3 + R4)] ..... [Equation 1]

상기 [식 1]에서 AD1, AD2, AD3의 값을 측정하면, [식 1]의 수식은 [식 2]와 같이 치환될 수 있다.When the values of AD1, AD2, and AD3 are measured in [Formula 1], the formula of [Formula 1] may be substituted as shown in [Formula 2].

K1 = (AD1_전압/AD2_전압) - 1K1 = (AD1_voltage / AD2_voltage)-1

K2 = (AD1_전압/AD3_전압) - 1 ..... [식 2]K2 = (AD1_voltage / AD3_voltage)-1 ..... [Equation 2]

여기서, K1=R1/R2, K2=R3/R4 이다.Here, K1 = R1 / R2 and K2 = R3 / R4.

이때, K1, K2값을 실측할 수 있으므로 가장 큰 오차의 원인인 저항값들의 허 용오차 차이를 소프트웨어 방식에 의해 일정량 보상할 수 있다.At this time, since the K1 and K2 values can be measured, a certain amount can be compensated by a software method for the difference in tolerances of the resistance values that cause the largest error.

그외 발생할 수 있는 오차는 삼각파형태의 전류를 측정 시 랜덤하게 측정하므로 Max Peak나 또는 Min Peak를 측정함으로 해서 발생할 수 있는 오차가 있을 수 있다. 이것은 첫째 PWM제어 주파수를 높이면 어느 정도 비례적으로 전류의 Peak-Peak값을 줄일 수 있으며, 둘째 AD2, AD3, 모니터부에 Low Pass Filter를 달아서 높은 주파수의 Peak값을 효과적으로 제거할 수 있으므로 Peak값에 의한 오차는 많이 상쇄할 수 있다.In addition, the error that may occur is randomly measured when measuring the triangular wave current, there may be an error that can occur by measuring the Max Peak or Min Peak. This is because first, the PWM control frequency can be increased proportionally to reduce the peak-peak value, and second, the low-pass filter can be effectively attached to the AD2, AD3, and monitor parts to effectively remove the high-frequency peak value. Error can be canceled out a lot.

이와 같이, 상기 전류측정부(50)에서 측정된 전류값이 제어부(20)에 입력되면, 상기 제어부(20)는 상기한 소프트웨어 방식으로 저항값들의 오차를 보상하여 PWM 듀티비를 제어함으로서 정밀한 전류를 측정할수록 정밀한 제어성능을 낼 수 있게 된다.As such, when the current value measured by the current measuring unit 50 is input to the control unit 20, the control unit 20 compensates for the error of the resistance values by the software method to control the PWM duty ratio to precise current. The more you measure, the more precise control you get.

상기의 설명에서와 같이, 본 발명에 의한 펄스폭변조 구동용 솔레노이드의 전류제어장치에 의하면, 기존의 단순한 ON/OFF 동작에 의한 제어에서 벗어나 다양한 제어로직을 구현하기 위해 실시간으로 솔레노이드에 흐르는 전류를 측정하는데 있어서 전류측정 시 발생할 수 있는 저항값들의 오차를 보상하여 정밀한 전류측정이 가능하고, 정밀한 전류값 측정에 따라 PWM 듀티비를 제어함으로서 원하는 제어성능을 확보할 수 있다는 효과가 있다.As described above, according to the current control device of the pulse width modulation driving solenoid according to the present invention, the current flowing through the solenoid in real time in order to implement various control logics from the conventional simple ON / OFF operation control In measuring, it is possible to precisely measure current by compensating for the error of resistance value that may occur during current measurement, and by controlling PWM duty ratio according to precise current value measurement, it is possible to secure desired control performance.

상기에서 설명한 것은 본 발명에 의한 펄스폭변조 구동용 솔레노이드의 전류제어장치를 실시하기 위한 하나의 실시예에 불과한 것으로, 본 발명은 상술한 실시 예에 한정되지 않고, 본 발명의 기술적 사상 내에서 당 분야의 통상의 지식을 가진 자에 의하여 여러 가지 변형이 가능함은 물론이다.What has been described above is just one embodiment for implementing the current control device of the pulse width modulation drive solenoid according to the present invention, the present invention is not limited to the above-described embodiment, it is within the technical spirit of the present invention Of course, various modifications are possible by one of ordinary skill in the art.

Claims (3)

플라이백 다이오드 보호회로를 갖춘 드라이버의 PWM 구동에 따라 밸브를 구동시키는 솔레노이드에 있어서,In the solenoid which drives a valve according to PWM drive of a driver equipped with a flyback diode protection circuit, 상기 솔레노이드에 연결되어 솔레노이드에 흐르는 전류를 실시간으로 측정하는 션트저항(Rs)과, 상기 션트저항의 전압을 분압하여 출력하는 분압저항(R1, R2), (R3, R4)을 포함하는 전류측정부; 및A current measuring unit including a shunt resistor (Rs) connected to the solenoid to measure the current flowing through the solenoid in real time, and a divided resistor (R1, R2) and (R3, R4) for dividing and outputting the voltage of the shunt resistor. ; And 복수의 ADC단(ADC1, ADC2, ADC3)이 마련되어 있고 상기 ADC2단에 연결된 일부의 분압저항(R1, R2)과, 상기 ADC3단에 연결된 나머지 분압저항(R3, R4)에서 측정된 전류값을 입력받아 전류측정 시 발생하는 상기 분압저항에서의 저항값의 오차를 보상하여 PWM 듀티비를 제어하는 제어부;A plurality of ADC stages (ADC1, ADC2, ADC3) are provided and input the partial voltage resistors (R1, R2) connected to the ADC2 stage and the current values measured at the remaining voltage divider (R3, R4) connected to the ADC3 stage. A control unit for controlling the PWM duty ratio by compensating for the error of the resistance value in the voltage dividing resistance generated during current measurement; 상기 제어부로부터 출력되는 PWM 구동 신호에 대응하여 온오프되는 제어용 전계효과 트랜지스터;A control field effect transistor turned on and off in response to the PWM driving signal output from the controller; 상기 제어용 전계효과 트랜지스터가 오동작되면 상기 제어부로부터 출력되는 구동신호에 대응하여 온오프되는 보호용 전계효과 트랜지스터를 포함하고,A protective field effect transistor which is turned on and off in response to a driving signal output from the controller when the control field effect transistor is malfunctioned; 상기 제어부는 상기 제어용 전계효과 트랜지스터와 보호용 전계효과 트랜지스를 오프시킨 상태에서 상기 복수의 ADC단을 통해 입력되는 각 전압에 기초하여 저항값의 오차를 측정하는 것을 특징으로 하는 펄스폭변조 구동용 솔레노이드의 전류제어장치.The control unit measures a pulse width modulation driving solenoid based on the respective voltages input through the plurality of ADC stages while the control field effect transistor and the protective field effect transistor are turned off. Current control device. 제 1항에 있어서, 상기 전류측정부는 According to claim 1, wherein the current measuring unit 상기 션트저항에 의해 검출된 전류의 노이즈 성분을 제거하는 복수의 컨덴서와, 상기 분압저항에 의해 평활된 전압 중 항복 전압 이상만을 바이패스하여 상기 제어부의 ADC2단 및 ADC3단에 입력되도록 하는 복수의 제너 다이오드를 더 포함하는 것을 특징으로 하는 펄스폭변조 구동용 솔레노이드의 전류제어장치.A plurality of Zeners for bypassing only a plurality of capacitors for removing the noise component of the current detected by the shunt resistor and a breakdown voltage or more of the voltage smoothed by the voltage divider resistor and inputting them to the ADC2 and ADC3 terminals of the controller. Current control device for a pulse width modulation drive solenoid further comprising a diode. 삭제delete
KR1020060036663A 2006-04-24 2006-04-24 Apparatus to control current of solenoid for PWM operation KR101163390B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020060036663A KR101163390B1 (en) 2006-04-24 2006-04-24 Apparatus to control current of solenoid for PWM operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020060036663A KR101163390B1 (en) 2006-04-24 2006-04-24 Apparatus to control current of solenoid for PWM operation

Publications (2)

Publication Number Publication Date
KR20070104981A KR20070104981A (en) 2007-10-30
KR101163390B1 true KR101163390B1 (en) 2012-07-12

Family

ID=38818603

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020060036663A KR101163390B1 (en) 2006-04-24 2006-04-24 Apparatus to control current of solenoid for PWM operation

Country Status (1)

Country Link
KR (1) KR101163390B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015110672B4 (en) * 2015-07-02 2024-04-11 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Circuit arrangement and method for monitoring a freewheeling diode, as well as use of the circuit arrangement

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005276222A (en) * 2004-03-25 2005-10-06 Husco Internatl Inc Electrohydraulic valve servomechanism with adaptive resistance estimator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005276222A (en) * 2004-03-25 2005-10-06 Husco Internatl Inc Electrohydraulic valve servomechanism with adaptive resistance estimator

Also Published As

Publication number Publication date
KR20070104981A (en) 2007-10-30

Similar Documents

Publication Publication Date Title
DK2515123T3 (en) Current sensor that works according to the compensation principle
WO1995003963A1 (en) Testing and speed control of electric motors in vehicles having electronically controlled braking systems
US7791302B2 (en) Method for measuring a motor current
KR101163390B1 (en) Apparatus to control current of solenoid for PWM operation
EP3423841B1 (en) Circuit and method for shunt current sensing
US9632111B2 (en) Passive input filter with clamping for shunt measurements
US20090324205A1 (en) Pulse count control for brushed dc motor driven by pulse width modulation
US8836269B2 (en) Method for detecting blockages of electrically commutated electric motors
JP6961820B2 (en) Methods for verifying the validity of actuator current measurements and use of the above methods
EP2843831B1 (en) Motor drive unit
US9634605B2 (en) Motor drive controller
JP2011041356A (en) Motor drive
EP2104223B1 (en) Switching unit for controlling an electronically commuted ventilation motor
KR100822324B1 (en) Electromagnetic compatibility filter circuit of pwm controller
WO2013027342A1 (en) Drive device for electromagnet coil
KR20080023875A (en) Apparatus to control current of solenoid for a valve operation
JP2010226028A (en) Device for driving of inductive load
JP3843332B2 (en) Electromagnetic actuator drive
JP2015046710A (en) Load drive circuit
CN110945330A (en) Temperature sensor circuit
KR102052954B1 (en) Solenoid controlling installation and method for preventing over energizing of the solenoid
Fowler Tutorial 12: An extention to outputs and actuators
DE102016204094A1 (en) Circuit arrangement and method for the secure transmission of a sensor signal
US8804384B2 (en) Converter for powering electric motor
EP1668771A1 (en) Control circuit and method for controlling an inductive electric consumer

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20160630

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20170622

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20180626

Year of fee payment: 7