KR890004235Y1 - Reel motor control circuit - Google Patents

Reel motor control circuit Download PDF

Info

Publication number
KR890004235Y1
KR890004235Y1 KR2019850017905U KR850017905U KR890004235Y1 KR 890004235 Y1 KR890004235 Y1 KR 890004235Y1 KR 2019850017905 U KR2019850017905 U KR 2019850017905U KR 850017905 U KR850017905 U KR 850017905U KR 890004235 Y1 KR890004235 Y1 KR 890004235Y1
Authority
KR
South Korea
Prior art keywords
terminal
voltage
real motor
resistor
transistor
Prior art date
Application number
KR2019850017905U
Other languages
Korean (ko)
Other versions
KR870011099U (en
Inventor
고경철
Original Assignee
주식회사 금성사
허신구
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 금성사, 허신구 filed Critical 주식회사 금성사
Priority to KR2019850017905U priority Critical patent/KR890004235Y1/en
Publication of KR870011099U publication Critical patent/KR870011099U/en
Application granted granted Critical
Publication of KR890004235Y1 publication Critical patent/KR890004235Y1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/26—Driving record carriers by members acting directly or indirectly thereon
    • G11B15/32—Driving record carriers by members acting directly or indirectly thereon through the reels or cores on to which the record carrier is wound
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

내용 없음.No content.

Description

리일 모우터 제어회로Rail motor control circuit

첨부된 도면은 본 고안의 리일 모우터 제어회로도이다.The accompanying drawings are a real motor control circuit diagram of the present invention.

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

1 : 레벨검출기 2 : 스위칭부1: level detector 2: switching unit

3 : 비교부 4 : 표시부3: comparison unit 4: display unit

5 : 리일 모우터 구동부 OP1,OP2 : 연산증폭기5: Real motor driving unit OP1, OP2: Operational Amplifier

TR1,TR2 : 트랜지스터 R1-R7 : 저항TR1, TR2: Transistor R1-R7: Resistance

SW1-SW6 : 전자스위치SW1-SW6: Electronic Switch

본 고안은 리일을 회전시키는 리일모우터의 제어회로에 관한 것으로, 특히 비디오 테이프의 텐션(tention)에 따라 리일 모우터를 양방향으로 제어할 수 있게한 리일 모우터 제어회로에 관한 것이다.The present invention relates to a control circuit of a rail motor for rotating the rail, and more particularly to a rail motor control circuit capable of controlling the rail motor in both directions in accordance with the tension of the video tape.

종래의 비디오 테이프 레코오더 등에 있어서는 텐션 포스트로 비디오 테이프의 텐션을 감지하고, 그 감지된 전압에 따라 리일 모우터를 제어하여 비디오 테이프의 텐션을 일정하게 유지하였다. 그러나 이와같은 종래의 제어회로는 텐션이 강할 경우에는 리일 모우터에 높은 전압을 인가시켜 빨리 회전시키고, 텐션이 약할 경우에는 리일 모우터에 인가된 전압을 낮게하여 리일 모우터의 회전이 자연감소 시키며, 즉, 리일모우터의 일방향으로만 제어가 가능하였으므로 리일모우터의 마찰력이 작아야만 되고, 또한 고급 베어링을 사용하여 리일모우터의 제작원가가 상승함은 물론 생산성이 저하되는 등 여러가지 결함이 있었다.In a conventional video tape recorder or the like, the tension post senses the tension of the video tape, and the tension motor is controlled according to the sensed voltage to maintain a constant tension of the video tape. However, such a conventional control circuit rotates quickly by applying a high voltage to the real motor when the tension is strong, and decreases the voltage applied to the real motor when the tension is weak, thereby naturally reducing the rotation of the real motor. That is, since only one direction of the real motor could be controlled, the frictional force of the real motor had to be small, and the manufacturing cost of the real motor increased as well as the productivity decreased due to the use of advanced bearings. .

본 고안은 이와 같은 종래의 결함을 감안하여, 레벨검출기로 텐션의 감지전압과 비교전압을 비교하여, 그 비교 전압으로 스위칭부를 제어하여 리일모우터를 양방향 즉, 정방향 및 역방향으로 제어하게 안출한 것으로 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.In view of the above-described deficiencies, the present invention compares the sensed voltage of the tension with a comparison voltage using a level detector, and controls the switching unit with the comparison voltage to control the real motor in both directions, namely, forward and reverse directions. This will be described in detail with reference to the accompanying drawings.

첨부된 도면은 본 고안의 제어회로도로서, 이에 도시한 바와같이 전원단자(Vcc)가 저항(R1) 및 가변저항(VR1), 저항(R2)을 통해 비반전입력단자(+)에 접속된 연산증폭기(OP1)의 반전입력단자 (-)에 감지전압단자(VTP)를 저항(R3)을 통해 접속하여, 그의 출력측을 저항 (R5)을 통해 저항(R4) 및 정전압 다이오드(ZD1)에 접속함과 아울러 그 접속점을 저항(R6)을 통해 트랜지스터(TR1)의 베이스에 접속하고, 이 트랜지스터(TR1)의 콜렉터는 전원단자 (Vcc)에 접속된 저항(R7)에 접속함과 아울러 그 접속점을 저항(R8)을 통한 후 콜렉터에 저항(R9)이 접속된 트랜지스터(TR2)의 베이스에 접속하여 레벨검출기(1)를 구성하고, 상기 검출전압단자(VTP) 및 가변저항(VR1)의 가변단자는 스위치(SW1,SW3), (SW2,SW4)의 가동단자에 접속하여 그 스위치(SW1,SW2), (SW2,SW4)의 제어단자에 상기 트랜지스트(TR2), (TR1)의 콜렉터를 각기 공통접속하고, 가동단자에 전원단자(Vcc)가 접속된 스위치 (SW5), (SW6)의 제어단자에 상기 트랜지스터 (TR1), (TR2)의 콜렉터를 각기 접속하여 스위칭부(2)를 구성하며, 상기 스위칭부(2)의 스위치 (SW1) (SW4)의 고정단자는 콘덴서 (C1) 및 저항 (R10)과 저항(R11)을 통해 연산증폭기(OP1)의 반전입력단자(-)에 접속하고, 스위치(SW2, SW3)의 고정단자는 저항(R12)을 통해 저항(R13) 및 연산증폭기(OP2)의 비반전입력단자 (+)ㅏ에 접속하여, 그의 출력측을 저항(R14)을 통해 그의 반전입력단자에 접속함과 아울러 그 연산 증폭기 (OP2)의 출력측을 저항(R15)을 통해 리일 모우터 구동부(5)의 입력단자(SF)에 접속하여 비교부(3)을 구성하고, 스위치(SW5), (SW6)의 저항(R16)(R17)을 통해 발광다이오드(LED1)(LED2)에 접속함과 아울러 스위치(SW6)의 고정단자 및 저항 (R17)의 접속점을 리일 모우터 구동부(5)의 방향단자 (CW/CCW)에 접속하여 구성한 것으로, 상기에서 스위치(SW1-SW6)는 그의 제어단자에 고전위가 인가될 때 단락되게 되어 있다.The accompanying drawings are a control circuit diagram of the present invention, as shown in the drawing, where the power supply terminal Vcc is connected to the non-inverting input terminal (+) through the resistor R1, the variable resistor VR1, and the resistor R2. The sense voltage terminal VTP is connected to the inverting input terminal (-) of the amplifier OP1 through the resistor R3, and its output side is connected to the resistor R4 and the constant voltage diode ZD1 through the resistor R5. In addition, the connection point is connected to the base of the transistor TR1 through the resistor R6, and the collector of the transistor TR1 is connected to the resistor R7 connected to the power supply terminal Vcc, and the connection point is connected to the resistor. After R8, the level detector 1 is formed by connecting to the base of transistor TR2 having a resistor R9 connected to the collector, and the variable terminal of the detection voltage terminal VTP and variable resistor VR1. The transistor TR is connected to the control terminals of the switches SW1, SW2, SW2, and SW4 by connecting to the movable terminals of the switches SW1, SW3, and SW2, SW4. 2) The collectors of the transistors TR1 and TR2 are respectively connected to the control terminals of the switches SW5 and SW6 each having a common connection between the collectors of TR1 and a power supply terminal Vcc connected to the movable terminal. Are connected to form a switching unit 2, and the fixed terminals of the switches SW1 and SW4 of the switching unit 2 are connected to the operational amplifier OP1 through the capacitor C1 and the resistors R10 and R11. Is connected to the inverting input terminal (-) of the switch, and the fixed terminals of the switches SW2 and SW3 are connected to the non-inverting input terminal (+) of the resistor R13 and the operational amplifier OP2 through the resistor R12, The output side thereof is connected to the inverting input terminal thereof through the resistor R14, and the output side of the operational amplifier OP2 is connected to the input terminal SF of the real motor driver 5 through the resistor R15 for comparison. The unit 3 is connected to the light emitting diodes LED1 and LED2 through the resistors R16 and R17 of the switches SW5 and SW6, and the fixed terminal and the resistor R17 of the switch SW6. Fold That is configured by connecting a point at the direction terminal (CW / CCW) of the reels Motor drive section 5, a switch (SW1-SW6) is presented at the short circuit when applied with the high potential to its control terminal.

이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.

비디오 테이프의 레코오더를 동작시켜 비디오 테이프를 주행시킴과 아울러 전원단자(Vcc)에 전원이 인가되게하면 전원단자(Vcc)의 전원은 저항 (R1) 및 가변저항(VR1)에 의해 분할된 후 저항 (R2)을 통해 연산 증폭기 (OP1)의 비반전 입력단자(+)에 기준전압으로 인가되고, 비디오 테이프의 주행에 따라 텐션을 감지하고, 그 감지전압은 감지전압단자(VTP)로 입력되어 저항(R3)을 통해 연산증폭기(OP1)의 반전입력단자(-)에 비교전압으로 인가된다.When the video tape is driven by operating the video tape recorder and power is supplied to the power supply terminal Vcc, the power supply of the power supply terminal Vcc is divided by the resistor R1 and the variable resistor VR1 and then A reference voltage is applied to the non-inverting input terminal (+) of the operational amplifier OP1 through R2 to sense a tension as the video tape travels, and the sensed voltage is input to the sensing voltage terminal VTP to provide a resistance. A comparison voltage is applied to the inverting input terminal (−) of the operational amplifier OP1 through R3.

이때, 비디오 테이프의 텐션이 약하여 텐션포스트에 의해 감지된 감지전압이 낮으면, 연산증폭기(OP1)의 반전 압력단자(-)에 인가되는 비교전압이 비반전 입력단자(+)에 인가된 기준전압보다 낮으므로 연산증폭기(OP1)의 출력측에는 고전위신호가 출력되고, 이 고전위신호는 트랜지스터(TR1)의 베이스에 인가되므로 그 트랜지스터 (TR1)가 온되어 그의 콜렉터에 저전위신호가 출력되며, 이 저전위신호는 트랜지스터(TR2)의 베이스에 인가되어 그를 오프시키므로 그의 콜렉터에 고전위신호가 출력된다. 이와같이 트랜지스터(TR1)의 콜렉터에 출력된 저전위신호는 스위치(SW3,SW4,SW5)의 제어단자에 인가되므로 그 스위치(SW3,SW4,SW5)는 개방되고 또 트랜지스터 (TR2)의 콜렉터에 출력된 고전위신호는 스위치(SW1,SW2,SW6)의 제어단자에 인가되므로 그 스위치(SW1,SW2,SW6)는 단락된다.At this time, when the tension of the video tape is weak and the sensing voltage sensed by the tension post is low, the reference voltage applied to the inverting pressure terminal (-) of the operational amplifier OP1 is applied to the non-inverting input terminal (+). Since it is lower, a high potential signal is output to the output side of the operational amplifier OP1, and this high potential signal is applied to the base of the transistor TR1, so that the transistor TR1 is turned on and a low potential signal is output to its collector. The low potential signal is applied to the base of the transistor TR2 to turn it off so that a high potential signal is output to its collector. As such, the low potential signal output to the collector of transistor TR1 is applied to the control terminal of switches SW3, SW4 and SW5, so that the switches SW3, SW4 and SW5 are opened and output to the collector of transistor TR2. The high potential signal is applied to the control terminals of the switches SW1, SW2 and SW6, so that the switches SW1, SW2 and SW6 are shorted.

따라서, 이때 감지 전압단자(VTP)의 감지전압은 스위치(SW1)를 통한 후 비교부(3)의 콘덴서(C1) 및 저항(R10)과 저항(R11)을 통해 연산증폭기(OP2)의 반전입력단자(-)에 인가되고, 가변저항(VR1)의 가변단자의 긴준전압은 스위치(SW2) 및 저항(R12)을 통해 연산증폭기(OP2)의 비반전입력단자(+)에 안가되므로 연산증폭기(OP2)의 출력측에는 비디오 테이프의 텐션편차에 따른 일정전압이 출력되고, 이 출력전압은 저항(R15)을 통해 리일 모우터, 구동부(5)의 입력단자(SF)에 인가된다.Accordingly, at this time, the sensed voltage of the sensed voltage terminal VTP is inputted through the switch SW1 and then the inverted input of the operational amplifier OP2 through the capacitor C1 and the resistor R10 and the resistor R11 of the comparator 3. Since the quasi-voltage of the variable terminal of the variable resistor VR1 is applied to the terminal (-), it is not provided to the non-inverting input terminal (+) of the operational amplifier OP2 through the switch SW2 and the resistor R12, so that the operational amplifier ( On the output side of OP2), a constant voltage according to the tension deviation of the video tape is output, and this output voltage is applied to the real motor and the input terminal SF of the driving unit 5 through the resistor R15.

또한 전원단자(Vcc)의 전원이 스위치(SW6)를 통한 후 저항(R17) 및 발광다이오드(LED2)를 통해 접지로 흐르면서 발광다이오드(LED2)를 점등시켜 비디오테이프 텐션이 약함을 알리게되고, 또 이때 스위치(SW6)를 통한 전원이 리일 모우터 구동부(5)의 방향단자(CW/CCW)에 인가되므로 리일 모우터 구동부(5)는 입력단자(SF)로 입력된 편차전압에 따라 리일 모우터를 역방향으로 구동시켜 비디오 테이프의 텐션을 강하게 한다.In addition, the power of the power supply terminal (Vcc) flows through the switch (SW6) to the ground through the resistor (R17) and the light emitting diode (LED2) to light up the light emitting diode (LED2) to indicate that the video tape tension is weak. Since the power through the switch SW6 is applied to the direction terminal CW / CCW of the real motor driver 5, the real motor driver 5 generates the real motor according to the deviation voltage input to the input terminal SF. Driving in the reverse direction strengthens the tension of the video tape.

그리고, 비디오 테이프의 텐션이 강하여 텐션포스트에 의해 감지된 전압이 높으면, 연산증폭기(OP1)의 반전 입력단자(-)에 인가되는 비교전압이 비반전입력단자(+)에 인가된 기준전압보다 높아 그의 출력측에 저전위 신호가 출력되므로 상기와는 반대로 트랜지스터(TR1)가 오프되어 그의 콜렉터에 고전위신호가 출력되고, 이 고전위신호에 의해 스위치(SW3,SW4,SW5)는 단락된다. 또한 이때 트랜지스터(TR1)의 콜렉터에 출력된 고전위신호에 의해 트랜지스터(TR2)가 온되어 그의 출력측에 저전위신호가 출력되며, 이 저전위신호에 의해 스위치(SW1,SW2,SW6)는 개방된다.When the tension of the video tape is high and the voltage sensed by the tension post is high, the comparison voltage applied to the inverting input terminal (-) of the operational amplifier OP1 is higher than the reference voltage applied to the non-inverting input terminal (+). Since the low potential signal is output to the output side thereof, contrary to the above, the transistor TR1 is turned off, and the high potential signal is output to the collector thereof, and the switches SW3, SW4, and SW5 are short-circuited by the high potential signal. At this time, the transistor TR2 is turned on by the high potential signal output to the collector of the transistor TR1, and the low potential signal is output to the output side thereof, and the switches SW1, SW2, and SW6 are opened by the low potential signal. .

따라서, 이때 감지전압단자(VTR)의 감지전압은 스위치(SW3) 및 저항(R12)을 통해 연산증폭기(OP2)의 비반전입력단자(+)에 인가되고, 가변저항(VR1)의 가변단자의 기준전압은 스위치(SW4)를 통한 후 콘덴서 (C1) 및 저항(R10)과 저항(R11)을 통해 연산증폭기(OP2)의 출력측에는 일정편차전압이 출력되고, 이 출력전압은 저항(R15)를 통하여 리일모우터 구동부(5)의 입력단자(SF)에 인가되고, 또한, 이때 스위치(SW6)의 오프에 의해 리일 모우터 구동부(5)의 방향단자(CW/CCW)에 저전위신호가 인가된다. 따라서 이때 리일 모우터 구동부(5)는 그의 입력단자(SF)로 입력된 편차전압에 따라 리일 모우터를 정방향으로 구동시켜 비디오 테이프의 텐션을 약하게 한다. 또한 이때 전원단자(Vcc)의 전원이 스위치(SW5)및 저항(R16)을 통해 발광다이오드(LED1)를 점등시켜 비디오 테이프의 텐션이 강함을 표시하게 된다.Therefore, at this time, the sensed voltage of the sensed voltage terminal VTR is applied to the non-inverted input terminal (+) of the operational amplifier OP2 through the switch SW3 and the resistor R12, and the variable terminal of the variable resistor VR1. The reference voltage is output through the switch SW4, and then a constant deviation voltage is output to the output side of the operational amplifier OP2 through the capacitor C1, the resistor R10, and the resistor R11, and this output voltage is applied to the resistor R15. The low potential signal is applied to the input terminal SF of the real motor driving unit 5 and the direction terminal CW / CCW of the real motor driving unit 5 by turning off the switch SW6. do. Accordingly, the real motor driver 5 drives the real motor in the forward direction according to the deviation voltage input to the input terminal SF, thereby weakening the tension of the video tape. In addition, at this time, the power supply of the power supply terminal Vcc turns on the light emitting diode LED1 through the switch SW5 and the resistor R16 to indicate that the tension of the video tape is strong.

이상에서 설명한 바와 같이 본 고안은 리일 모우터를 비디오테이프의 텐션에 따라 정방향 또는 역방향으로 제어하게되므로 종래와 같이 리일 모우터의 마찰력을 작게할 필요가 없어 원가절감을 기할 수 있음은 물론 생산성이 향상되는 효과가 있다.As described above, the present invention controls the real motor in the forward or reverse direction according to the tension of the video tape, so that the friction force of the real motor does not need to be reduced as in the related art, thereby reducing the cost and improving productivity. It is effective.

Claims (1)

기준전압 및 비디오 테이프의 텐션감지전압을 비교하는 비교부(3)와, 비교부(3)의 출력전압으로 리일모우터를 제어하는 리일 모우터 구동부(5)로 구성한 리일 모우터 제어회로에 있어서, 전원단자(Vcc)측에 접속된 가변저항(VR1)의 가변다자 및 감지전압단자(VTP)를 연산증폭기(OP1)의 비반전 및 반전입력단자측에 각기 접속함과 아울러 스위치(SW1,SW3), (SW2,SW4)의 가동단자에 각기 공통접속하고, 상기 연산증폭기(OP1)의 출력측을 제너다이오드(ZD1) 및 트랜지스터(TR1)의 베이스에 접속하여 그의 콜렉터를 트랜지스터(TR2)의 베이스측 및 상기 스위치(SW3,SW4)의 제어단자에 공통접속하고, 상기 트랜지스트(TR2)의 콜렉터를 상기 스위치(SW1,SW2)의 제어단자 및 가동단자가 전원단자(Vcc)에 접속된 스위치(SW6)의 제어단자에 공통접속하며, 상기 스위치(SW1,SW4), (SW2,SW3)의 고종단자를 상기 비교부(3)의 반전 및 비반전입력 단자측에 각기 공통접속하고, 상기 스위치(SW6)의 고정단자를 상기 리일 모우터 구동부(5)의 방향단자(CW/CCW)에 접속하여 구성된 것을 특징으로하는 리일 모우터 제어회로.In a real motor control circuit comprising a comparator (3) for comparing a reference voltage and a tension sensing voltage of a video tape, and a real motor driver (5) for controlling a real motor with an output voltage of the comparator (3). The variable voltage and sensing voltage terminals VTP of the variable resistor VR1 connected to the power supply terminal Vcc are connected to the non-inverting and inverting input terminals of the operational amplifier OP1, respectively, and the switches SW1 and SW3. ), (SW2, SW4) are commonly connected to the movable terminals, respectively, and the output side of the operational amplifier OP1 is connected to the base of the zener diode ZD1 and the transistor TR1, and its collector is connected to the base side of the transistor TR2. And a switch SW6 having a common connection to the control terminals of the switches SW3 and SW4, wherein the collector of the transistor TR2 is connected to the control terminal and the movable terminal of the switches SW1 and SW2 to the power supply terminal Vcc. Commonly connected to the control terminal of), and the type of switch (SW1, SW4), (SW2, SW3) The ruler is commonly connected to the inverting and non-inverting input terminals of the comparing section 3, respectively, and the fixed terminal of the switch SW6 is connected to the direction terminal CW / CCW of the real motor driving section 5. A real motor control circuit, characterized in that.
KR2019850017905U 1985-12-28 1985-12-28 Reel motor control circuit KR890004235Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019850017905U KR890004235Y1 (en) 1985-12-28 1985-12-28 Reel motor control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019850017905U KR890004235Y1 (en) 1985-12-28 1985-12-28 Reel motor control circuit

Publications (2)

Publication Number Publication Date
KR870011099U KR870011099U (en) 1987-07-15
KR890004235Y1 true KR890004235Y1 (en) 1989-06-26

Family

ID=19247645

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019850017905U KR890004235Y1 (en) 1985-12-28 1985-12-28 Reel motor control circuit

Country Status (1)

Country Link
KR (1) KR890004235Y1 (en)

Also Published As

Publication number Publication date
KR870011099U (en) 1987-07-15

Similar Documents

Publication Publication Date Title
US4603283A (en) Variable speed control for a brushless direct current motor
KR890004235Y1 (en) Reel motor control circuit
GB1531490A (en) Pulse controllers for series motors
KR940005495Y1 (en) Arrangement for starting dc motor
KR920000565Y1 (en) For vtr (video tape record) tape driving motor control circuit
KR910002332Y1 (en) Motor stopping circuit
KR840000982Y1 (en) Automatic stopping device of cassette tape recorder
SU1767528A1 (en) Magnetic tape control device
KR910003264Y1 (en) Switching circuit for motor-speed
KR870003299Y1 (en) Slow control device
KR0113245Y1 (en) Rotating direction control circuit of a motor
KR900003174Y1 (en) Motor driving control circuit
JPH02162159A (en) Electric power steering device
KR900003176Y1 (en) Motor driving control circuit
KR900001120Y1 (en) Reel servo circuit of video tape recorder
JPS5917010Y2 (en) display circuit
KR880001391Y1 (en) Vtr drum
KR940000495Y1 (en) Control circuit for capstan motor
KR900001425Y1 (en) Display circuit of playing direction for auto-reverse tape
KR910002331Y1 (en) Direction switching circuit of reel-motor
KR890010843A (en) How to search scheduled recording time
KR900007910Y1 (en) Head speed control circuit
JPS56145543A (en) Magnetic recording and reproducing device
KR890001946B1 (en) Synchronizing start circuit in tape recorder
KR910007244Y1 (en) Controlling circuit of capstan motor break signal for image recording and reproducing apparatus

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
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19981221

Year of fee payment: 11

LAPS Lapse due to unpaid annual fee