KR910000673Y1 - Control circuit of valve - Google Patents

Control circuit of valve Download PDF

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KR910000673Y1
KR910000673Y1 KR2019880005482U KR880005482U KR910000673Y1 KR 910000673 Y1 KR910000673 Y1 KR 910000673Y1 KR 2019880005482 U KR2019880005482 U KR 2019880005482U KR 880005482 U KR880005482 U KR 880005482U KR 910000673 Y1 KR910000673 Y1 KR 910000673Y1
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resistor
diode
resistors
capacitor
output
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KR2019880005482U
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KR890021533U (en
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이남훈
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삼원 F.A주식회사
홍원표
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25297—Identify controlled element, valve, and read characteristics
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25312—Pneumatic, hydraulic modules, controlled valves
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/41—Servomotor, servo controller till figures
    • G05B2219/41306—Control valve with counteracting control pulses

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Amplifiers (AREA)

Abstract

내용 없음.No content.

Description

콘트롤 밸브의 제어회로Control circuit of control valve

첨부도면은 본 고안의 회로도.The accompanying drawings are circuit diagrams of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

OP1,OP2,OP3,OP4,OP5 : 비교증폭기 가 : Speed 회로OP1, OP2, OP3, OP4, OP5: Comparative amplifier A: Speed circuit

나 : Feed Back 회로 A,B : 속도 및 압력제어회로B: Feed Back Circuit A, B: Speed and Pressure Control Circuit

본 고안은 사출성형기 등의 금형 개폐등 각종 유압기기의 압력과 유량을 자동으로 제어하는 부품인 전자비례변을 제어하는 회로에 관한 것이다.The present invention relates to a circuit for controlling the electronic proportional valve, a component for automatically controlling the pressure and flow rate of various hydraulic equipment, such as opening and closing the mold of the injection molding machine.

종래의 제어회로는 입력교류 전원의 변화가 출력부하에 영향을 미치게 되므로 기계적 동작이 불안정하고 공급 주파수가 120HZ의 단일 주파수의 사용으로 특정한 전자비례변에만 사용이 제한되는 폐단이 있었다.In the conventional control circuit, since the change of the input AC power affects the output load, the mechanical operation is unstable, and the use of a single frequency of 120HZ has limited the use of a specific electromagnetic proportional valve.

본 고안은 이와 같은 점을 감안하여 안출한 것으로 피드백회로를 사용하여 전자비례변에 가해지는 전류를 일정하게 하므로서 출력부하측의 변동을 없게 함과 동시에 모든 전자비례변이 200HZ 이내에서 동작하는 것이 착안하여 공급주파수를 50-200HZ까지 가변시킬 수 있게 하므로서 전자비례변의 종류의 관계없이 사용할 수 있게 SLOW START/SLOW STOP 회로를 부가하여 전자비례변의 개폐시에 전자비례변의 동작을 시간으로 조절하여 충격완화 및 사출금형을 보호하여 막대한 비용을 절감할 수 있게 함과 동시에 압력과 속도를 동시에 조절할 수 있게 하여 정밀조작을 가능하게 한 것인데 이를 첨부도면에 의거 상술하면 다음과 같다.The present invention has been devised in consideration of such a point, and the feedback circuit is used to make the current applied to the electron proportional side constant so that there is no variation in the output load side, and all electron proportional side operate within 200HZ. By changing the frequency up to 50-200HZ, the SLOW START / SLOW STOP circuit is added so that it can be used regardless of the type of electromagnetic proportional variable. It is possible to control the pressure and speed at the same time to reduce the enormous cost by protecting the precise operation is possible to be described in detail according to the accompanying drawings as follows.

입력단(P1)(P2)(P3)에 가변저항(VR1)을 연결하고 가변저항(VR2)와 저항(R6)(R4)을 통하여 콘덴서(C1)와 다이오드(D1)를 병렬 연결하여 +12V로부터 저항(R1)(R2), 가변저항(VR3)을 거쳐 비교증폭기(OP1)의 반전입력단자에 연결하며 비교증폭기(OP1)의 출력단자는 저항(R3)(R7), 콘덴서(C2), 가변저항(VR4)(VR5), 다이오드(D2)(D3)를 통하여 비교증폭기(OP2)의 입력단자에 연결하고 비반전입력단자는 저항(R4)에 연결하며 출력단자는 저항(R11)(R12), 콘덴서(C3)(C4), 다이오드(D4)를 접속하고 저항(R10)을 통하여 비교증폭기(OP1)의 입력단자에 연결하여서 되는 Speed회로(가)와 비교증폭기(OP3)의 입력 단자에 다이오드(D5)(D6), 저항(R6)(R13)(R16), 콘덴서(C5)를 연결하고 출력단자에는 저항(R17)(R18)(R19)를 연결하여 비교증폭기(OP4)의 입력단자에 다이오드(D7)(D8), 저항(R20)을 통하여 접속하며 출력단자는 콘덴서(C6)와 제너다이오드(ZD)가 병렬로 연결되어 비교증폭기(OP5)의 입력단자에 접속하고 비교증폭기(OP5)의 출력단자에는 저항(R25)(R26), 다이오드(D9)를 연결하여 트랜지스터(TR1)의 베이스에 연결하고 에미터에는 저항(R27)(R28)을 연결하여 트랜지스터(TR2)의 베이스에 접속하고 콜렉터는 저항(R29)(R30)을 연결하여 트랜지스터(TR3)의 베이스와 연결하여 이의 콜렉터는 브리지다이오드(BD)에 연결하여 병렬로 저항(R32), 콘덴서(C7)가 연결하고 에미터에는 저항(R31), 다이오드(D10) 및 저항(R0)이 연결되어 브리지다이오드에 연결하고 그리고 브리지다이오드의 나머지 두 단자는 트랜스(PT)로 연결하여서 되는 Feed Back회로(나)로서 구성된 속도 및 압력제어회로(A)(B)를 트랜지스터(FET)의 베이스측에 가변저항(VR6), 저항(R21), 콘덴서(C8)를 연결하여 트랜지스터(PVT)에 저항(R22)(R23)을 연결하여서 되는 톱니파 발진회로(다)의 비교증폭기(OP5)의 입력단자에 접속하여서 되는 것이다.The variable resistor VR1 is connected to the input terminals P1, P2, and P3, and the capacitor C1 and the diode D1 are connected in parallel through the variable resistor VR2 and the resistor R6 and R4, respectively. It is connected to the inverting input terminal of the comparative amplifier OP1 via the resistors R1 (R2) and the variable resistor VR3, and the output terminals of the comparative amplifier OP1 are the resistors R3 (R7), the capacitor (C2) and the variable resistor. (VR4) (VR5), diode (D2) (D3) connect to input terminal of comparative amplifier (OP2), non-inverting input terminal to resistor (R4), output terminal (R11) (R12), capacitor (C3) (C4) and diode (D4) are connected to the input terminal of the comparison amplifier (OP1) by connecting the diode (D4) and the resistor (R10) and the diode (D5) to the input terminal of the comparison amplifier (OP3). (D6), resistors (R6), (R13), (R16), and capacitor (C5) are connected, and the output terminals are connected with resistors (R17), (R18), and R19. D7) (D8), connect via resistor R20 and output terminal The denser C6 and the zener diode ZD are connected in parallel and connected to the input terminal of the comparison amplifier OP5, and the resistors R25, R26 and diode D9 are connected to the output terminal of the comparison amplifier OP5. It is connected to the base of the transistor TR1, and the resistors R27 and R28 are connected to the emitter to the base of the transistor TR2, and the collector is connected to the base of the transistor TR3 by connecting the resistors R29 and R30. The collector is connected to the bridge diode (BD) and connected in parallel with a resistor (R32) and a capacitor (C7). The emitter is connected with a resistor (R31), a diode (D10) and a resistor (R0). And the other two terminals of the bridge diode are connected by a transformer (PT), and a speed and pressure control circuit (A) (B) configured as a feed back circuit (B) is connected to the base of the transistor (FET) with a variable resistor (VR6). ), Resistor R21 and capacitor C8 are connected to the transistor PVT for resistor R22 ( R23) is connected to the input terminal of the comparative amplifier OP5 of the sawtooth oscillation circuit (C).

이와같이 본 고안의 작용효과를 설명하면 다음과 같다.As described above, the effect of the present invention is as follows.

스피드회로(가)는 Slow-Start, Slow-Stop 기능을 하는 회로로서 입력단(P1)(P2)(P3)에 연결된 가변저항(VR1)에서 가변되는 0-5V의 전압을 가변저항(VR2), 저항(R6)에서 감쇄량을 조절하여 비교증폭기(OP1) 입력단 보호용 콘덴서(C1), 다이오드(D1), 저항(R5)을 통하여 비교증폭기(OP1)의 부입력으로 들어감과 동시에 +12V, 저항(R1), 가변저항(VR3)으로 구성된 기본량 설정치가 저항(R2)을 통하여 비교증폭기(OP1)의 부입력에 가해진다.The speed circuit (A) is a circuit that functions as a slow-start and a slow-stop function. The speed circuit is configured to convert a voltage of 0-5V that is varied by the variable resistor VR1 connected to the input terminals P1, P2, and P3, and includes the variable resistor VR2, By adjusting the attenuation in the resistor (R6) to enter the negative input of the comparative amplifier (OP1) through the capacitor (C1), diode (D1), resistor (R5) for the protection of the input stage of the comparative amplifier (OP1), + 12V, resistor (R1) ), And a basic amount set value composed of the variable resistor VR3 is applied to the negative input of the comparison amplifier OP1 through the resistor R2.

이렇게 비교증폭기(OP1)의 부입력에 가해진 전압량과 정입력에 가해진 (가) 회로의 궤환량을 비교하여 비교증폭기(OP1)의 출력단은 부입력이 정입력보다 클때는 부전압이 출력되고 부입력이 정입력보다 작을때는 정전압이 출력되며 부입력과 정입력이 같을때는 영전압이 출력된다.In this way, the amount of voltage applied to the negative input of the comparative amplifier OP1 is compared with the feedback amount of the circuit (a) applied to the positive input, and the output terminal of the comparative amplifier OP1 outputs a negative voltage when the negative input is larger than the positive input. When the input is smaller than the positive input, the constant voltage is output. When the negative input and the positive input are the same, the zero voltage is output.

저항(R3)은 비교증폭기(OP1)의 부궤환용이고 콘덴서(C2)는 비교증폭기(OP1)의 오동작 방지용이다.The resistor R3 is for negative feedback of the comparative amplifier OP1 and the capacitor C2 is for preventing malfunction of the comparative amplifier OP1.

비교증폭기(OP1)에서 출력될때는 저항(R7), 가변저항(VR4), 다이오드(D2)를 통하여 콘덴서(C3)에 전압이 충전되므로서 비교증폭기(OP2)의 출력은 가변저항(VR4)의 조정량에 따라 전압이 서서히 상승하며 비교증폭기(OP1)에서 정전압이 출력될 때는 저항(R7), 가변저항(VR5), 다이오드(D3)를 통하여 콘덴서(C3)의 전압이 방전되므로서 비교증폭기(OP2)의 출력은 가변저항(VR5)의 조정량에 따라 서서히 하강하며 비교증폭기(OP1)에서 영전압이 출력될 때는 콘덴서(C3)의 전압 유지를 하게 된다.When output from the comparison amplifier OP1, a voltage is charged to the capacitor C3 through the resistor R7, the variable resistor VR4, and the diode D2, so that the output of the comparison amplifier OP2 is connected to the variable resistor VR4. The voltage gradually rises according to the adjustment amount, and when the constant voltage is output from the comparative amplifier OP1, the voltage of the capacitor C3 is discharged through the resistor R7, the variable resistor VR5, and the diode D3, and thus the comparative amplifier ( The output of OP2) gradually decreases according to the adjustment amount of the variable resistor VR5, and maintains the voltage of the capacitor C3 when zero voltage is output from the comparative amplifier OP1.

저항(R9)은 비교증폭기(OP2)의 오프셋용이며, 저항(R11)(R12), 다이오드(D4), 콘덴서(C4)는 비교증폭기(OP2)의 출력안정용 적분회로이고 저항(R10)(R8)에 의하여 비교증폭기(OP2)의 출력을 비교증폭기(OP1)의 정입력에 궤환량으로 돌려준다.Resistor R9 is for offset of comparative amplifier OP2, resistors R11 (R12), diode D4, and capacitor C4 are integral circuits for output stabilization of comparative amplifier OP2 and resistors R10 (R8). ) Returns the output of the comparison amplifier OP2 to the positive input of the comparison amplifier OP1 as a feedback amount.

다음 (다)회로를 설명하면 (가)회로에서 출력되는 전압은 오프셋용 저항(R15)(R16)과 보호용 다이오드(D5)(D6)와 궤환용 저항(R13)(R14), 콘덴서(C5)로 구성된 비교증폭기(OP3)에서 반전증폭하고, 저항(R17)(R19)으로 분배하여 저항(R18)을 통하여 설정치가 비교증폭기(OP4)의 부입력으로 가해짐과 동시에 전자비례변에 흐르는 전류량도 저항(R0)을 통하여 궤환량이 비교증폭기(OP4)의 부입력으로 가해진다.In the following circuit (c), the voltage output from the circuit (a) is offset resistor (R15) (R16), protective diode (D5) (D6), feedback resistor (R13) (R14), and capacitor (C5). The inverted amplification is performed by the comparative amplifier OP3, which is divided into the resistors R17 and R19, the set value is applied to the negative input of the comparative amplifier OP4 through the resistor R18, and the amount of current flowing through the electron proportional valve is also increased. The feedback amount is applied to the negative input of the comparative amplifier OP4 through the resistor R0.

입력보호용 다이오드(D7)(D8)와 오프셋용 저항(R20)과 출력평활용 콘덴서(C6)와 출력전압 제한용 제너다이오드(ZD)로 구성된 비교증폭기(OP4)는 설정치와 궤환량이 같아질 수 있도록 출력전압을 일정하게 유지시켜 주는 역할을 한다.The comparison amplifier OP4, which consists of an input protection diode D7 (D8), an offset resistor (R20), an output smoothing capacitor (C6), and an output voltage limiter zener diode (ZD), has the same setpoint and feedback rate. It keeps the output voltage constant.

비교증폭기(OP4)의 출력은 비교증폭기(OP5)의 정입력으로 전달되고 (다)회로에서 발생하는 톱니파는 비교증폭기(OP5)의 부입력으로 전달되어 부입력이 정입력보다 클때는 비교증폭기(OP5)는 부입력의 출력을 발생하고 부입력이 정입력보다 작을때는 정전압의 출력을 발생시켜 비교증폭기(OP5)의 정입력전압에 따라 비교증폭기(OP5)의 출력은 정전압출력과 부전압출력의 비율이 바뀌게 되어 PWM 방식의 제어파형을 발생시킨다.The output of the comparison amplifier OP4 is transmitted to the positive input of the comparison amplifier OP5, and the sawtooth wave generated in the circuit is transmitted to the negative input of the comparison amplifier OP5, and when the negative input is larger than the positive input, the comparison amplifier ( OP5) generates the output of the negative input and generates a constant voltage when the negative input is smaller than the positive input. The output of the comparative amplifier OP5 is the output of the constant voltage output and the negative voltage output according to the positive input voltage of the comparative amplifier OP5. The ratio is changed to generate a PWM control waveform.

이렇게 하여 얻어진 PWM 출력은 저항(R25)을 통하여 부전압출력이 다이오드(D9)로 전류가 흘러서 트랜지스터(T1)을 보호하며 정전압출력은 저항(R25)(R26)으로 전압분배되어 트랜지스터(TR1)을 구동시킨다.The PWM output obtained in this way has a negative voltage output flowing through the resistor R25 to the diode D9 to protect the transistor T1, and the constant voltage output is divided by the resistors R25 and R26 to divide the transistor TR1. Drive it.

트랜지스터(TR1)가 구동되면 저항(R27)(R28)으로 전압분배되어 트랜지스터(TR2)를 구동시키고 이로서 저항(R29)(R30)으로 전압분배되어 트랜지스터(TR3)을 구동시킨다.When the transistor TR1 is driven, the voltage is divided by the resistors R27 and R28 to drive the transistor TR2, and thereby the voltage is distributed by the resistors R29 and R30 to drive the transistor TR3.

즉 비교증폭기(OP5)의 출력이 부전압 출력일 때는 트랜지스터(TR1)(TR2)(TR3)가 오프(OFF)되고 정전압 출력일 때는 트랜지스터(TR1)(TR2)(TR3)가 온(ON)되어 AC입력전원을 DC로 바꾸어주는 정류기인 브리지다이오드(BD1)와 DC전원 평활용인 콘덴서(C7)와 AC 입력전원이 오프(OFF) 되었을때(C7) 방전용인 저항(R32)으로 구성된 정류회로에서 얻어진 전압이 트랜지스터(TR3), 저항(R31)을 거쳐서 제어대상인 전자비례변으로 전류를 흘려주게 된다.That is, when the output of the comparative amplifier OP5 is the negative voltage output, the transistors TR1, TR2, and TR3 are turned off. When the constant voltage output is the transistors TR1, TR2, and TR3 are turned on. In the rectifier circuit composed of a bridge diode (BD1), a rectifier for converting AC input power to DC, a capacitor (C7) for smoothing DC power, and a resistor (R32) for discharging when AC input power is turned off (C7). The obtained voltage flows a current through the transistor TR3 and the resistor R31 to the electron proportional side to be controlled.

이때 전자비례변에 흐르는 전류는 저항(R31)에도 흐르게 되어 얻어지는 전압을 저항(R0)을 통하여 비교증폭기(OP4)의 부입력에 궤환량으로 되돌려지게 되어 AC220V 공급전원이 변동이 있더라도 전자비례변에는 항상 일정전류를 흘려주게 된다.At this time, the current flowing through the electron proportional side also flows to the resistor R31, and the voltage obtained is returned to the negative input of the comparative amplifier OP4 through the resistor R0. It will always flow a constant current.

그리고 (다)회로는 PUT의 K-G간 전압보다 K-A간 전압이 높이면 K-A가 도통하는 특성을 이용하여 톱니파를 발생시키는 회로로서 트랜지스터(FET1)은 콘덴서(C8)에 일정한 전류를 흘려 충전하기 위한 목적이며 가변저항(VR6), 저항(R21)에 의하여 충전전류가 결정된다.And (c) circuit is a circuit that generates sawtooth wave by using the characteristic that KA conducts when voltage between KA is higher than voltage between KG of PUT. Transistor (FET1) is for the purpose of charging a constant current through capacitor C8. The charging current is determined by the variable resistor VR6 and the resistor R21.

즉 톱니파의 주파수를 가변저항(VR6)으로 조정하여 전자비례변에 가해지는 전압의 주파수로 결정되어진다.In other words, the frequency of the sawtooth wave is adjusted by the variable resistor VR6 to determine the frequency of the voltage applied to the electromagnetic proportional side.

트랜지스터(TRE1), 가변저항(VR6), 저항(R21)을 통하여 흐르는 전류는 콘덴서(C8)에 충전이 되어 전압이 상승하게 되다가 저항(R22)(R23)으로 분할된 전압 즉, PUT1의 K-G간의 전압보다 커지면 K-A간이 도통하게 되어 콘덴서(C8)이 충전전압을 순식간에 방전하므로 인하여 K-A간 전압이 0V가 되어 K-A간 전압보다 K-A간 전압이 낮게 되고 PUT1은 오프(OFF)가 되어 콘덴서(C8)는 다시 충전을 하게 되어 톱니파를 발생하는 회로가 구성된다.The current flowing through the transistor TRE1, the variable resistor VR6, and the resistor R21 is charged to the capacitor C8 to increase the voltage, and then the voltage divided by the resistors R22 and R23, that is, between KG of the PUT1. When the voltage is greater than the voltage between KA, the capacitor C8 discharges the charging voltage in an instant. Therefore, the voltage between the KA becomes 0V and the voltage between the KA is lower than the voltage between the KA and PUT1 is turned OFF. Is recharged to form a circuit for generating sawtooth waves.

이와 같이 PWM(Pulse Width Modulation:펄스 폭 변조)방식으로 채택된 본 고안은 출력 트랜지스터(TR3)와 전원트랜스(T1) 등의 열손실 절감과 전력소모를 줄일 수 있는 획기적인 고안으로 안정된 출력을 얻을 수 있으며 전자비례변의 종류에 관계없이 사용이 가능하고 압력 및 속도를 겸용해서 제어하는 효과가 있다.As such, the present invention adopting PWM (Pulse Width Modulation) method is a breakthrough design that can reduce heat loss and power consumption of output transistor (TR3) and power supply transformer (T1). It can be used regardless of the type of electron proportional valve and has the effect of controlling by using both pressure and speed.

Claims (1)

입력단(P1)(P2)(P3)에 가변저항(VR1)을 연결하고 가변저항(VR2)와 저항(R6)(R4)을 통하여 콘덴서(C1)와 다이오드(D1)를 병렬 연결하여 +12V로부터 저항(R1)(R2), 가변저항(VR3)을 거쳐 비교증폭기(OP1)의 반전입력단자에 연결하며 비교증폭기(OP1)의 출력단자는 저항(R3)(R7), 콘덴서(C2), 가변저항(VR4)(VR5), 다이오드(D2)(D3)를 통하여 비교증폭기(OP2)의 입력단자에 연결하고 비반전입력단자는 저항(R4)에 연결하며 출력단자는 저항(R11)(R12), 콘덴서(C3)(C4), 다이오드(D4)를 접속하고 저항(R10)을 통하여 비교증폭기(OP1)의 입력단자에 연결하여서 되는 Speed회로(가)와 비교증폭기(OP3)의 입력 단자에 다이오드(D5)(D6), 저항(R6)(R13)(R16), 콘덴서(C5)를 연결하고 출력단자에는 저항(R17)(R18)(R19)를 연결하여 비교증폭기(OP4)의 입력단자에 다이오드(D7)(D8), 저항(R20)을 통하여 접속하며 출력단자는 콘덴서(C6)와 제너다이오드(ZD)가 병렬로 연결되어 비교증폭기(OP5)의 입력단자에 접속하고 비교증폭기(OP5)의 출력단자에는 저항(R25)(R26), 다이오드(D9)를 연결하여 트랜지스터(TR1)의 베이스에 연결하고 에미터에는 저항(R27)(R28)을 연결하여 트랜지스터(TR2)의 베이스에 접속하고 콜렉터는 저항(R29)(R30)을 연결하여 트랜지스터(TR3)의 베이스와 연결하며 이의 콜렉터는 브리지다이오드(BD)에 연결하여 병렬로 저항(R32), 콘덴서(C7)가 연결되고 에미터에는 저항(R31), 다이오드(D10) 및 저항(R0)이 연결되어 브리지다이오드에 연결하며 그리고 브리지다이오드의 나머지 두 단자는 트랜스(PT)로 연결하여서 되는 Feed Back회로(나)로서 구성된 속도 및 압력제어회로(A)(B)를 트랜지스터(FET)의 베이스측에 가변저항(VR6), 저항(R21), 콘덴서(C8)를 연결하여 트랜지스터(PVT)에 저항(R22)(R23)을 연결하여서 되는 톱니파 발진회로(다)의 비교증폭기(OP5)의 입력단자에 접속하여서 되는 콘트롤 밸브의 제어회로.The variable resistor VR1 is connected to the input terminals P1, P2, and P3, and the capacitor C1 and the diode D1 are connected in parallel through the variable resistor VR2 and the resistor R6 and R4, respectively. It is connected to the inverting input terminal of the comparative amplifier OP1 via the resistors R1 (R2) and the variable resistor VR3, and the output terminals of the comparative amplifier OP1 are the resistors R3 (R7), the capacitor (C2) and the variable resistor. (VR4) (VR5), diode (D2) (D3) connect to input terminal of comparative amplifier (OP2), non-inverting input terminal to resistor (R4), output terminal (R11) (R12), capacitor (C3) (C4) and diode (D4) are connected to the input terminal of the comparison amplifier (OP1) by connecting the diode (D4) and the resistor (R10) and the diode (D5) to the input terminal of the comparison amplifier (OP3). (D6), resistors (R6), (R13), (R16), and capacitor (C5) are connected, and the output terminals are connected with resistors (R17), (R18), and R19. D7) (D8), connect via resistor R20 and output terminal The denser C6 and the zener diode ZD are connected in parallel and connected to the input terminal of the comparison amplifier OP5, and the resistors R25, R26 and diode D9 are connected to the output terminal of the comparison amplifier OP5. It is connected to the base of the transistor TR1, and the resistors R27 and R28 are connected to the emitter to the base of the transistor TR2, and the collector is connected to the base of the transistor TR3 by connecting the resistors R29 and R30. Its collector is connected to the bridge diode (BD) by connecting a resistor (R32) and a capacitor (C7) in parallel.The emitter is connected with a resistor (R31), a diode (D10) and a resistor (R0). And the other two terminals of the bridge diode are connected by a transformer (PT), and a speed and pressure control circuit (A) (B) configured as a feed back circuit (B) is connected to the base of the transistor (FET) with a variable resistor (VR6). ), Resistor R21 and capacitor C8 are connected to the transistor PVT for resistor R22 ( Control circuit of a control valve connected to the input terminal of the comparative amplifier OP5 of the sawtooth oscillation circuit (C) connected by R23).
KR2019880005482U 1988-04-14 1988-04-14 Control circuit of valve KR910000673Y1 (en)

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KR910000673Y1 true KR910000673Y1 (en) 1991-02-08

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