KR20100003500A - Power control apparatus of proportional control valve for farming machines and power control method of using the same - Google Patents

Power control apparatus of proportional control valve for farming machines and power control method of using the same Download PDF

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KR20100003500A
KR20100003500A KR1020080063432A KR20080063432A KR20100003500A KR 20100003500 A KR20100003500 A KR 20100003500A KR 1020080063432 A KR1020080063432 A KR 1020080063432A KR 20080063432 A KR20080063432 A KR 20080063432A KR 20100003500 A KR20100003500 A KR 20100003500A
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input voltage
voltage
control valve
power
proportional
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KR1020080063432A
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KR100993418B1 (en
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감병우
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대동공업주식회사
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

Abstract

PURPOSE: A power control device of a proportional control valve for an agricultural machine is provided to secure the stable driving by minimizing the heat due to the loss of the input voltage. CONSTITUTION: An input voltage sensor(120) is arranged between a power supply port(110) and a controller(130). A plurality of resistors(R1,R2) of the input voltage sensor is serially connected to the power supply port to measure the distribution voltage of the power supply. The controller outputs the control signal according to the comparison result after comparing the variation value of the sensed input voltage with the reference value. A switch(140) controls the on/off of the power supply of a proportional control valve(150) according to the output signal.

Description

농기계용 비례제어밸브의 전원제어장치 및 이를 이용한 전원제어방법{POWER CONTROL APPARATUS OF PROPORTIONAL CONTROL VALVE FOR FARMING MACHINES AND POWER CONTROL METHOD OF USING THE SAME}Power control device for proportional control valve for agricultural machinery and power control method using same {POWER CONTROL APPARATUS OF PROPORTIONAL CONTROL VALVE FOR FARMING MACHINES AND POWER CONTROL METHOD OF USING THE SAME}

본 발명은 비례제어밸브를 정밀 제어할 수 있도록 하는 전원제어방치 및 이를 이용한 전원제어방법에 관한 것이다.The present invention relates to a power control method for precisely controlling a proportional control valve and a power control method using the same.

일반적으로 트랙터, 콤바인, 이앙기 등과 같은 농기계의 작업기 제어, 주행 속도제어, 경심 제어 및 부하제어를 위한 시스템에 비례제밸브가 사용된다.In general, proportional control valves are used in systems for working machine control, traveling speed control, hard control and load control of agricultural machinery such as tractors, combines, rice transplanters, and the like.

비례제어밸브는 솔레노이드 밸브에 공급되는 전원의 크기를 제어함으로써 가동철심에 유도되는 전자력의 크기를 제어하게 되고, 이로써 스풀의 이동거리를 제어할 수 있도록 된 밸브를 일컫는데, 그 제어의 대상에 따라, 압력을 제어하는 압력비례제어밸브와 유량을 제어하는 유량비례제어밸브 두 가지로 나눌 수 있고, 농기계용 비례제어밸브는 주로 유량제어방식이 이용된다.Proportional control valve refers to a valve that can control the magnitude of the electromagnetic force induced to the moving core by controlling the size of the power supplied to the solenoid valve, thereby controlling the movement distance of the spool, depending on the object of the control The proportional control valve for controlling the pressure and the proportional control valve for controlling the flow can be divided into two types. The proportional control valve for agricultural machinery is mainly used for the flow control method.

상기와 같은 비례제어밸브를 정밀 제어하기 위해서는 입력전압의 변동폭을 최소화시켜 균일한 전원이 공급되도록 하는 부하제어 시스템이 사용된다.In order to precisely control the proportional control valve as described above, a load control system for minimizing the fluctuation of the input voltage to supply uniform power is used.

이러한, 부하제어 시스템은 통상 도 1에서 보는 바와 같은 정전압 레귤레이터(13)를 이용한 정전압 회로(10)가 사용되고 있다.In this load control system, the constant voltage circuit 10 using the constant voltage regulator 13 as shown in FIG. 1 is used normally.

상기한 바와 같은 정전압 회로(10)는 전압 입력포트(11)로 입력된 외부 전압을 정전압 레귤레이터(13)를 통해 일정한 전압으로 변화시켜 전압 출력포트(15)를 통해 외부로 출력하여 밸브 등의 외부 비례제어밸브(20)에 공급하게 된다.The constant voltage circuit 10 as described above changes the external voltage inputted through the voltage input port 11 to a constant voltage through the constant voltage regulator 13 and outputs it to the outside through the voltage output port 15 to externally the valve. The proportional control valve 20 is supplied.

여기서, 상기 정전압 레귤레이터(13)라 함은, 입력 전압과 출력 부하가 변화하더라도 항상 일정한 출력 전압을 유지하도록 설계된 장치를 일컫는다.Here, the constant voltage regulator 13 refers to a device designed to maintain a constant output voltage at all times even if the input voltage and the output load change.

그러나, 상기 종래기술에서와 같은 정전압회로(10)에 사용되는 정전압 레귤레이터(13)는 사용부하가 크면 클수록 원가가 상승되고 레귤레이터의 표면온도가 상승하여 방열판의 크기가 증가된다는 문제가 있었다.However, the constant voltage regulator 13 used in the constant voltage circuit 10 as in the related art has a problem in that as the use load increases, the cost increases and the surface temperature of the regulator increases to increase the size of the heat sink.

또한, 상기 정전압 레귤레이터(13)는 통상 입력전압을 압력 강하시켜 정전압 출력을 행함으로써, 실제 입력 전압 대비 출력전압의 손실이 발생되는 문제가 있었고, 정전압 레귤레이터(13) 표면에 손실전압으로 인한 열이 발생되어 내부 기판에 영향을 주어 내구성 저하 혹은 부품의 오작동 등을 유발 시키는 문제가 있었다.In addition, the constant voltage regulator 13 has a problem in that a loss of output voltage compared to an actual input voltage occurs by performing a constant voltage output by pressure dropping an input voltage, and heat due to a loss voltage is generated on the surface of the constant voltage regulator 13. There is a problem that affects the internal substrate is generated causing degradation or malfunction of parts.

또한, 상기 종래기술은 입력 전압에 따라 사용 가능한 정전압 레귤레이터(13)의 전압이 용이하지 않기 때문에 정전압 레귤레이터(13)의 선정이 용이하지 않은 문제가 있었다.In addition, since the voltage of the constant voltage regulator 13 usable according to the input voltage is not easy, there is a problem in that the selection of the constant voltage regulator 13 is not easy.

예를 들어, 차량용 12볼트(V)의 정전압을 사용하고자 하는 경우, 최소 입력 전압이 14.5볼트 이상 유지되어야 하지만, 이는 일반적인 주행차량의 최고 전압에 해당하기 때문에 엔진의 회전수가 충분하지 않을 경우에는 이상 동작이 발생되는 문제가 있었고, 이는 10볼트(V)의 정전압 레귤레이터를 사용하더라도 차량 시스템의 다른 전원(12볼트)과 전압이 맞지 않는 문제가 있었다.For example, if you want to use a constant voltage of 12 volts (V) for a vehicle, the minimum input voltage should be maintained at 14.5 volts or more, but this is equivalent to the highest voltage of a typical driving vehicle. There was a problem that the operation occurs, which was a problem that the voltage does not match the other power supply (12 volts) of the vehicle system even if a constant voltage regulator of 10 volts (V).

종래기술의 문제점을 해결하기 위한 본 발명의 목적은 저렴하고 간단한 구조로 이루어지는 전원공급장치를 제공함에 있다.An object of the present invention for solving the problems of the prior art is to provide a power supply device made of a cheap and simple structure.

본 발명의 다른 목적은 전압 손실 및 이로 인한 발열문제를 해결하도록 된 전원공급장치를 제공함에 있다.Another object of the present invention is to provide a power supply device to solve the voltage loss and the resulting heating problem.

본 발명의 목적을 달성하기 위한 농기계용 비례제어밸브의 전원제어장치는 전원 공급포트에 복수의 저항이 직렬로 연결되어 공급전원의 분배전압을 측정하도록 된 입력전압 감지부; 상기 입력전압 감지부에서 감지된 입력전압의 변동값을 입력 받아 기준값과 비교하고, 비교 결과값에 반비례하도록 전압출력시간을 제어하도록 된 제어부; 및 상기 제어부의 출력신호에 따라 비례제어밸브의 공급전원을 온/오프 제어하도록 된 스위칭부;를 포함한다.Power control device for a proportional control valve for agricultural machinery for achieving the object of the present invention is a plurality of resistors connected in series to the power supply port is input voltage sensing unit for measuring the distribution voltage of the power supply; A controller configured to receive a change value of the input voltage sensed by the input voltage detector, compare the result with a reference value, and control a voltage output time to be inversely proportional to the comparison result value; And a switching unit configured to control on / off supply power of the proportional control valve according to the output signal of the controller.

그리고, 본 발명의 목적을 달성하기 위한 농기계용 비례제어밸브의 전원제어방법은 전원 공급포트에 복수의 저항이 직렬로 연결된 입력전압 감지부를 통해 공급전원의 분배전압을 측정하는 단계; 상기 입력전압 감지부에서 감지된 입력전압의 변동값을 제어부에서 입력 받아 기준값과 비교하여 비교 결과값에 반비례하도록 전압출력시간을 조정하여 출력하는 단계; 및 상기 제어부의 출력신호에 따라 스위칭부가 비례제어밸브의 공급전원을 온/오프 제어하는 단계;를 포함한다.In addition, the power control method for a proportional control valve for agricultural machinery for achieving the object of the present invention comprises the steps of measuring the distribution voltage of the power supply through an input voltage sensing unit connected in series with a plurality of resistors in the power supply port; Adjusting a voltage output time to receive a change value of the input voltage sensed by the input voltage detector from a control unit and compare the result with a reference value to be inversely proportional to a comparison result value; And controlling the on / off supply power of the proportional control valve according to the output signal of the controller.

본 발명은 고가의 정전압 레귤레이터를 사용하지 않고도 저렴한 가격의 농기계용 비례제어밸브의 전원제어장치를 구성할 수 있게 되는 효과를 갖는다.The present invention has the effect that it is possible to configure a power control device of a proportional control valve for agricultural machinery at a low price without using an expensive constant voltage regulator.

본 발명은 입력전압의 손실이 없기 때문에 손실 전압으로 인한 발열 문제를 최소화시켜 장치의 안정적으로 구동이 이루어지는 효과를 갖는다.According to the present invention, there is no loss of the input voltage, thereby minimizing the heat generation problem due to the loss voltage, thereby achieving the stable driving of the device.

이하, 본 발명의 바람직한 실시 예에 대해 첨부된 도면을 참조하여 자세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the present invention will be described in detail.

도 2는 본 발명에 따른 농기계용 비례제어밸브의 전원제어장치의 회로도로서, 동 도면에서 보는 바와 같은 전원제어장치(100)는 비례제어밸브에 안정적으로 전원이 공급될 수 있도록 하기 위한 일종의 펄스폭변조(PWM) 회로를 구성한다.Figure 2 is a circuit diagram of a power control device for a proportional control valve for agricultural machinery according to the present invention, the power control device 100 as shown in the figure is a kind of pulse width for stably supplying power to the proportional control valve Configure a modulation (PWM) circuit.

이를 위한 본 발명의 전원제어장치(100)는 전원 공급포트(110)와 제어부(130) 사이에 입력 전압의 변동을 감지하는 입력전압 감지부(120)가 구비되도록 한다.The power control device 100 of the present invention for this purpose is provided with an input voltage detection unit 120 for detecting a change in the input voltage between the power supply port 110 and the controller 130.

상기 입력전압 감지부(120)는 전원 공급포트(110)에 저항1,2(R1)(R2)를 직렬로 연결시켜 분배전압이 측정될 수 있도록 한다.The input voltage detector 120 connects the resistors 1, 2 (R1) and R2 in series to the power supply port 110 so that the distribution voltage can be measured.

상기 입력전압 감지부(120)에서의 분배전압은 제어부(130)의 A/D포트(131)로 입력되어 입력전압의 변동이 감지되도록 하는데, 상기 제어부(130)는 마이컴(micom)이 이용될 수 있다.The divided voltage in the input voltage detector 120 is input to the A / D port 131 of the controller 130 to detect a change in the input voltage. The controller 130 may use a micom. Can be.

상기 감지된 입력 전압의 변동값은 제어부(130)에서 기준값과 비교된 후, 비교 결과값에 따른 제어신호를 출력하게 된다.The detected change in the input voltage is compared with the reference value by the controller 130, and then outputs a control signal according to the comparison result value.

이때, 비교 결과값과 제어신호 출력값은 상호 반비례 관계를 갖게 되는데, (식 1)을 참조하여 이에 대해 자세히 설명한다.At this time, the comparison result and the control signal output value has an inverse relationship with each other, with reference to (Equation 1) will be described in detail.

(식 1) ---- 출력 = 전압 * 통전시간(Equation 1) ---- output = voltage * energization time

상기 (식 1)에서 보는 바와 같이 출력값은 전압과 통전시간에 비례하여 증가됨을 알 수 있다.As shown in Equation 1, the output value increases in proportion to the voltage and the energization time.

여기서, 동일한 출력 조건을 가정했을 때, 전압과 통전시간은 서로 반비례관계에 있기 때문에 낮은 전압이 입력되는 경우에는 통전시간을 길게 설정하고, 초과 전압이 입력되는 경우에는 통전시간을 짧게 설정하면 되는 것이다.Here, when the same output condition is assumed, the voltage and the energization time are inversely related to each other. Therefore, when a low voltage is input, the energization time is set long, and when the excess voltage is input, the energization time is set short. .

상기 제어부(130)에서의 출력신호는 스위칭부(140)의 온/오프 신호를 제어함으로써, 듀티비(duty rate)를 조절하게 된다.The output signal from the controller 130 controls the on / off signal of the switching unit 140 to adjust the duty ratio.

여기서, 듀티비라 함은, 듀티비 가변증폭회로 즉 펄스폭변조(PWM)회로의 스위칭 주기에 있어서, 1주기 동안 전원이 온(on)되어 있는 시간의 비를 일컫는다.Here, the duty ratio refers to the ratio of the time that the power is turned on for one period in the switching period of the duty ratio variable amplifier circuit, that is, the pulse width modulation (PWM) circuit.

즉, 상기 스위칭부(140)는 일종의 스위칭 트랜지스터로서, 일정한 주파수를 가지고 주기적으로 전원을 온(on)/오프(off) 작동시키게 된다.That is, the switching unit 140 is a kind of switching transistor, and periodically turns on / off the power with a constant frequency.

상기한 바와 같은 본 발명은 스위칭부(140)의 온(on) 주기를 조절함으로써, 비례제어밸브(150)에 일정한 출력의 전원을 안정적으로 공급할 수 있게 된다.According to the present invention as described above, by adjusting the on (on) period of the switching unit 140, it is possible to stably supply power of a constant output to the proportional control valve 150.

예를 들어, 기존의 정전압 레귤레이터(10V)를 사용한 회로에서 실린더의 길이를 10mm 증대하는데 걸리는 시간이 5초라고 했을 때, 출력은 10V * 5sec 이며, 스위칭부에서의 1주기 당 듀티비는 항상 50%로 일정하게 출력된다.For example, in the circuit using the conventional constant voltage regulator (10V), the time taken to increase the length of the cylinder by 10 mm is 5 seconds, the output is 10V * 5sec, and the duty ratio per cycle at the switching unit is always 50. Constant output in%

상기한 바와 같은 본 발명은 입력전압이 항상 변동되는 불안정한 경우로서, 이를 보정하기 위한 방법으로 입력전압 감지부(120)를 통해 입력전압의 변동값이 감지되도록 하고, 상기 변동값에 따라 스위칭부(140)에서의 통전시간 즉 듀티비가 함께 변동되도록 제어함으로써, 출력값이 항상 일정하게 유지되도록 한다.As described above, the present invention is an unstable case in which the input voltage is always fluctuated. As a method for correcting the above, the change in the input voltage is sensed through the input voltage detecting unit 120, and the switching unit according to the change value is used. By controlling the energization time, i.e., the duty ratio at 140, to fluctuate together, the output value is always kept constant.

도 3은 전압 변동에 따른 듀티비 변동 그래프로서, 동 도면을 통해 입력전압의 변동과 이에 따른 스위칭부(140)에서의 듀티비 변동이 서로 반비례관계에 있음을 볼 수 있다.3 is a graph of the duty ratio variation according to the voltage variation, and it can be seen from the figure that the variation in the input voltage and the variation in the duty ratio in the switching unit 140 are inversely related to each other.

도 4의 (a), (b)는 입력전압 및 통전시간에 따른 출력관계를 도시한 주파수 파형도로서, (a)는 입력전압이 기준값과 같은 10V 일 때, 듀티비를 50%(5초)의 출력이 행해지도록 제어하는 예를 도시하고 있고, (b)는 입력전압이 기준값보다 낮은 8V 일 때, 듀티비를 62.5%(6.25초)의 출력이 행해지도록 제어하는 예를 도시하고 있다.4 (a) and 4 (b) are frequency waveform diagrams showing output relations according to an input voltage and an energization time, and (a) shows a duty ratio of 50% (5 seconds) when the input voltage is 10 V equal to the reference value. (B) shows an example in which the duty ratio is controlled to be 62.5% (6.25 seconds) when the input voltage is 8V lower than the reference value.

또한, 도면에는 도시되지 않았지만 입력전압이 기준값보다 높은 13V인 경우에는 듀티비를 38.4%(3.84초)가 되도록 출력을 제어하게 되는 것이다.In addition, although not shown in the drawing, when the input voltage is 13V higher than the reference value, the output is controlled to have a duty ratio of 38.4% (3.84 seconds).

상기한 바와 같은 원리로 제어되는 본 발명은 고가의 정전압 레귤레이터를 사용하지 않고도 저렴한 가격으로 전원공급장치를 구성할 수 있고, 입력전압의 손실이 없기 때문에 손실 전압으로 인한 열 발생 문제가 없어 안정적인 구동이 가능하다.The present invention, which is controlled on the principle as described above, can configure a power supply at a low price without using an expensive constant voltage regulator, and since there is no loss of input voltage, there is no problem of heat generation due to a loss voltage, thereby ensuring stable driving. It is possible.

도 1은 종래기술에 따른 정전압 회로도.1 is a constant voltage circuit diagram according to the prior art.

도 2는 본 발명에 따른 농기계용 비례제어밸브의 전원제어장치 의 회로도.Figure 2 is a circuit diagram of a power control device for a proportional control valve for farm machinery according to the present invention.

도 3은 전압 변동에 따른 듀티비 변동 그래프.3 is a graph of duty ratio variation according to voltage variation.

도 4의 (a), (b)는 입력전압 및 통전시간에 따른 출력관계를 도시한 주파수 파형도.4 (a) and 4 (b) are frequency waveform diagrams illustrating output relations according to input voltages and energization times.

<도면 중 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100: 전원공급장치100: power supply

110: 공급포트110: supply port

120: 입력전압 감지부120: input voltage detector

130: 제어부130: control unit

131: A/D포트131: A / D port

133: 출력포트133: output port

140: 스위칭부140: switching unit

150: 비례제어밸브150: proportional control valve

Claims (2)

전원 공급포트(110)에 복수의 저항이 직렬로 연결되어 공급전원의 분배전압을 측정하도록 된 입력전압 감지부(120);A plurality of resistors connected in series with the power supply port 110 to measure a distribution voltage of the supply power; 상기 입력전압 감지부(120)에서 감지된 입력전압의 변동값을 입력 받아 기준값과 비교하고, 비교 결과값에 반비례하도록 전압출력시간을 제어하도록 된 제어부(130); 및A control unit 130 configured to receive a change value of the input voltage sensed by the input voltage detection unit 120, compare it with a reference value, and control a voltage output time to be inversely proportional to the comparison result value; And 상기 제어부(130)의 출력신호에 따라 비례제어밸브(150)의 공급전원을 온/오프 제어하도록 된 스위칭부(140);A switching unit 140 configured to control on / off supply power of the proportional control valve 150 according to the output signal of the controller 130; 를 포함하는 농기계용 비례제어밸브의 전원제어장치.Power control device for a proportional control valve for agricultural machinery comprising a. 전원 공급포트(110)에 복수의 저항이 직렬로 연결된 입력전압 감지부(120)를 통해 공급전원의 분배전압을 측정하는 단계;Measuring a distribution voltage of the supply power through an input voltage detector 120 in which a plurality of resistors are connected in series to the power supply port 110; 상기 입력전압 감지부(120)에서 감지된 입력전압의 변동값을 제어부(130)에서 입력 받아 기준값과 비교하여 비교 결과값에 반비례하도록 전압출력시간을 조정하여 출력하는 단계; 및Adjusting the voltage output time to receive a change value of the input voltage sensed by the input voltage detector 120 from the controller 130 and compare it with a reference value to be inversely proportional to the comparison result value; And 상기 제어부(130)의 출력신호에 따라 스위칭부(140)가 비례제어밸브(150)의 공급전원을 온/오프 제어하는 단계;A switching unit 140 controlling on / off supply power of the proportional control valve 150 according to the output signal of the control unit 130; 를 포함하는 농기계용 비례제어밸브의 전원제어방법.Power control method of the proportional control valve for agricultural machinery comprising a.
KR1020080063432A 2008-07-01 2008-07-01 Power control apparatus of proportional control valve for farming machines and power control method of using the same KR100993418B1 (en)

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Publication number Priority date Publication date Assignee Title
CN114135677A (en) * 2021-11-20 2022-03-04 厦门坤锦电子科技有限公司 Flow control valve and control method thereof
CN114135677B (en) * 2021-11-20 2024-05-14 厦门坤锦电子科技有限公司 Flow control valve and control method thereof

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KR100544186B1 (en) * 2003-06-12 2006-01-23 삼성전자주식회사 Apparatus for providing power

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114135677A (en) * 2021-11-20 2022-03-04 厦门坤锦电子科技有限公司 Flow control valve and control method thereof
CN114135677B (en) * 2021-11-20 2024-05-14 厦门坤锦电子科技有限公司 Flow control valve and control method thereof

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