KR0163264B1 - Motor driving control circuit - Google Patents
Motor driving control circuit Download PDFInfo
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- KR0163264B1 KR0163264B1 KR1019960015071A KR19960015071A KR0163264B1 KR 0163264 B1 KR0163264 B1 KR 0163264B1 KR 1019960015071 A KR1019960015071 A KR 1019960015071A KR 19960015071 A KR19960015071 A KR 19960015071A KR 0163264 B1 KR0163264 B1 KR 0163264B1
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- motor
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- resistor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
- H02H7/205—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment for controlled semi-conductors which are not included in a specific circuit arrangement
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08112—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in bipolar transistor switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Generators And Motors (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
본 발명은 모터의 구동제어회로에 관한 것으로, 모터의 구속 및 내부회로의 쇼트등에 의하여 발생되는 과전류에 의해 구동회로내의 트랜지스터가 파손되는 것을 방지할 수 있도록 된 것이다. 이를 위하여 본 발명에 따른 모터의 구동제어회로는 모터(M)와, 상기 모터(M)에 병렬연결되고 모터구동신호가 베이스단에 입력되면 오프되는 NPN트랜지스터(Q1), 상기 NPN트랜지스터(Q1)의 에미터단에 그 에미터단이 직렬연결되며 베이스단에 모터구동신호가 입력되면 온되어 상기 모터(M)에 전원을 인가하는 PNP트랜지스터(Q2)를 구비한 모터의 구동제어회로에 있어서, 상기 NPN트랜지스터(Q1)와 PNP트랜지스터(Q2)의 각 에미터단의 중간탭에 직렬연결된 저항(R5) 및 상기 저항(R5)의 양단에 베이스단 및 에미터단이 각각 접속되고 컬렉터단은 저항(R4)를 개재하여 상기 NPN트랜지스터(Q1)의 베이스단에 접속되는 PNP트랜지스터(Q3)를 갖는 과전류보호회로부(10)를 구비한 것을 특징으로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control circuit of a motor, and is capable of preventing a transistor in a drive circuit from being damaged by an overcurrent generated due to the restraint of the motor and a short of an internal circuit. To this end, the drive control circuit of the motor according to the present invention includes an NPN transistor Q1 and an NPN transistor Q1 which are connected in parallel with the motor M, the motor M, and turned off when a motor driving signal is input to the base end. In the drive control circuit of the motor having a PNP transistor (Q2) for supplying power to the motor (M) is turned on when the emitter terminal is connected in series with the emitter terminal of the base terminal is input to the motor terminal, the NPN A resistor (R5) connected in series to the middle tap of each emitter stage of the transistor (Q1) and the PNP transistor (Q2) and the base and emitter terminals are connected to both ends of the resistor (R5), and the collector stage is connected to the resistor (R4). An overcurrent protection circuit portion 10 having a PNP transistor Q3 connected to the base end of the NPN transistor Q1 is provided.
Description
제1도는 종래 모터의 구동제어회로를 보인 도.1 is a view showing a drive control circuit of a conventional motor.
제2도는 본 발명에 따른 모터의 구동제어회로를 보인 도이다.2 is a view showing a drive control circuit of a motor according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
PC : 포토커플러 Q3 : PNP트랜지스터PC: Photocoupler Q3: PNP Transistor
10 : 과전류보호회로부10: overcurrent protection circuit
본 발명은 모터의 구동제어회로에 관한 것으로, 더욱 상세하게는 과전류에 의한 구동제어소자의 파손을 방지할 수 있도록 된 모터의 구동제어회로에 관한 것이다.The present invention relates to a drive control circuit of a motor, and more particularly, to a drive control circuit of a motor that can prevent damage to the drive control element due to overcurrent.
제1도는 종래 모터의 구동제어회로의 상세회로도를 도시한 것이다. 제1도에 도시한 바와 같이 모터의 구동제어회로는 외부로부터 입력되는 모터구동신호에 상응하는 소정의 전압신호를 분압하는 저항(R1)(R2), 상기 저항(R2)와 병렬연결된 포토다이오드 및 상기 포토다이오드로부터 베이스신호를 입력받아 구동되는 포토트랜지스터로 이루어지는 포토커플러(PC), 상기 포토트랜지스터의 도통시 베이스단에 로우신호가 인가되어 오프되는 NPN트랜지스터(Q1), 상기 NPN트랜지스터와 직렬연결되며 베이스단이 상기 포토트랜지스터의 컬렉터에 접속된 PNP트랜지스터(Q2)를 구비한다. 또한, 상기 NPN트랜지스터(Q1)의 컬렉터단은 전원에 접속되며, 컬렉터단과 베이스단은 저항(R3)에 의해 접속된다. 반면, 상기 NPN트랜지스터(Q1)와 병렬로 전원에 접속되는 모터(M) 및 역전압방지용 다이오드(D1)가 각각 연결된다.1 is a detailed circuit diagram of a drive control circuit of a conventional motor. As shown in FIG. 1, the driving control circuit of the motor includes resistors R1 and R2 for dividing a predetermined voltage signal corresponding to a motor driving signal input from the outside, a photodiode connected in parallel with the resistor R2, and A photocoupler (PC) comprising a phototransistor driven by receiving a base signal from the photodiode, an NPN transistor (Q1) which is turned off by applying a low signal to a base terminal when the phototransistor is in conduction, and is connected in series with the NPN transistor; The base end has a PNP transistor Q2 connected to the collector of the phototransistor. The collector terminal of the NPN transistor Q1 is connected to a power supply, and the collector terminal and the base terminal are connected by a resistor R3. On the other hand, the motor M and the reverse voltage prevention diode D1 connected to the power supply in parallel with the NPN transistor Q1 are connected, respectively.
이와 같은 구성에 따라 모터의 구동제어회로의 동작을 설명하면, 먼저 구동전원(+24V)이 인가된 상태에서는 저항(R3)를 통해 NPN트랜지스터(Q1)의 베이스단에 하이신호가 인가되므로, NPN트랜지스터는 턴온(turn on)된다. 반면, PNP트랜지스터(Q2)가 턴오프(turn off)된 상태이므로 모터(M)는 구동되지 않고 구동대기상태를 유지하게 된다.Referring to the operation of the drive control circuit of the motor according to such a configuration, first, since the high signal is applied to the base terminal of the NPN transistor Q1 through the resistor R3 while the driving power supply (+ 24V) is applied, the NPN The transistor is turned on. On the other hand, since the PNP transistor Q2 is turned off, the motor M is not driven and maintains a driving standby state.
이때 외부의 입력단으로부터 하이상태의 모터구동신호가 입력되면, 저항(R1)(R2)에 의해 소정 크기로 분압된 전압을 인가받은 포토커플러가 구동되게 되므로, NPN트랜지스터는 턴오프(turn off)된다. 반면, PNP트랜지스터(Q2)의 베이스단에 로우신호가 인가되므로 턴온되고, 모터(M)가 구동전원을 인가받아 구동되게 된다. 모터구동신호의 입력이 오프되어 포토커플러(PC)에 로우신호가 입력되면, NPN트랜지스터(Q1)는 턴온되고 PNP 트랜지스터(Q2)는 턴오프되므로 모터(M)의 구동이 정지되게 된다.At this time, when the motor driving signal in the high state is input from the external input terminal, the photocoupler applied with the voltage divided by the predetermined magnitude by the resistors R1 and R2 is driven, so that the NPN transistor is turned off. . On the other hand, since a low signal is applied to the base end of the PNP transistor Q2, the signal is turned on, and the motor M is driven by being supplied with driving power. When the input of the motor driving signal is turned off and the low signal is input to the photocoupler PC, the NPN transistor Q1 is turned on and the PNP transistor Q2 is turned off, so that the driving of the motor M is stopped.
그러나, 이상과 같은 구성 및 동작에 있어서 모터의 구속 및 내부회로의 쇼트발생시에 PNP트랜지스터(Q2)에 과전류가 인가되어 파손되므로 정상적인 동작을 수행할 수 없는 문제점이 있었다.However, in the configuration and operation as described above, overcurrent is applied to the PNP transistor Q2 during the restraint of the motor and the short circuit of the internal circuit, thereby causing a problem in that the normal operation cannot be performed.
따라서, 본 발명은 이러한 문제점을 해결하고자 안출된 것으로 그 목적은 모터의 구속 및 내부회로의 쇼트등에 의하여 발생되는 과전류에 의해 구동제어회로의 트랜지스터가 파손되는 것을 방지할 수 있도록 된 모터의 구동제어회로를 제공하고자 하는 것이다.Accordingly, the present invention has been made to solve such a problem, and an object thereof is a drive control circuit of a motor which can prevent the transistor of the drive control circuit from being damaged by an overcurrent generated by the restraint of the motor and the short of the internal circuit. Is to provide.
이러한 목적을 실현하기 위하여 본 발명은 모터와, 상기 모터에 병렬연결되고 모터구동신호가 베이스단에 입력되면 오프되는 NPN트랜지스터, 상기 NPN트랜지스터의 에미터단에 그 에미터단이 직렬연결되며 베이스단에 모터구동신호가 입력되면 온되어 상기 모터에 전원을 인가하는 PNP트랜지스터를 구비한 모터의 구동제어회로에 있어서, 상기 NPN트랜지스터와 PNP트랜지스터의 각 에미터단의 중간탭에 직렬연결된 저항 및 상기 저항의 양단에 베이스단 및 에미터단이 각각 접속되고 컬렉터단은 저항을 개재하여 상기 NPN트랜지스터의 베이스단에 접속되는 PNP트랜지스터를 갖는 과전류보호회로부를 구비한 것을 특징으로 한다.In order to achieve the above object, the present invention provides a motor, an NPN transistor connected in parallel to the motor and turned off when a motor driving signal is input to the base end, and an emitter end connected in series to the emitter end of the NPN transistor and the motor connected to the base end. In a drive control circuit of a motor having a PNP transistor that is turned on when a drive signal is input to supply power to the motor, a resistance connected in series to an intermediate tap of each emitter terminal of the NPN transistor and the PNP transistor and a resistance connected to both ends of the resistor. A base end and an emitter end are respectively connected, and the collector end has an overcurrent protection circuit portion having a PNP transistor connected to the base end of the NPN transistor via a resistor.
이하에는 본 발명의 양호한 실시예에 따른 구성 및 작용효과를 상세하게 설명한다.Hereinafter, the configuration and the effect according to the preferred embodiment of the present invention will be described in detail.
제2도는 본 발명에 따른 모터의 구동제어회로의 상세회로도를 도시한 것이다.2 shows a detailed circuit diagram of the drive control circuit of the motor according to the present invention.
본 발명의 구성은 제2도에 도시한 바와 같이, 외부에서 제공되는 모터구동제어신호에 상응하는 소정 크기의 전압신호를 분압하는 저항(R1)(R2), 상기 저항(R2)와 병렬연결된 포토다이오드 및 상기 포토다이오드로부터 베이스신호를 입력받아 구동되는 포토트랜지스터로 이루어지는 포토커플러(PC), 상기 포토트랜지스터의 도통시 베이스단에 로우신호가 인가되어 오프되는 NPN트랜지스터(Q1), 상기 NPN트랜지스터(Q1)와 직렬연결되며 베이스단이 상기 포토트랜지스터의 컬렉터에 접속된 PNP트랜지스터(Q2)를 구비한다. 또한, 상기 NPN트랜지스터(Q1)의 컬렉터단은 전원에 접속되며, 컬렉터단과 베이스단은 저항(R3)에 의해 접속된다. 반면, 상기 NPN트랜지스터(Q1)와 병렬로 전원에 접속되는 모터(M) 및 역전압방지용 다이오드(D1)가 각각 연결된다.As shown in FIG. 2, the configuration of the present invention includes resistors R1 and R2 for dividing a voltage signal having a predetermined magnitude corresponding to an externally provided motor driving control signal, and a photo connected in parallel with the resistor R2. A photocoupler (PC) comprising a phototransistor driven by receiving a base signal from a diode and the photodiode, an NPN transistor (Q1) and a NPN transistor (Q1) which are turned off by applying a low signal to the base terminal when the phototransistor conducts. ) Has a PNP transistor Q2 connected in series and having a base end connected to a collector of the phototransistor. The collector terminal of the NPN transistor Q1 is connected to a power supply, and the collector terminal and the base terminal are connected by a resistor R3. On the other hand, the motor M and the reverse voltage prevention diode D1 connected to the power supply in parallel with the NPN transistor Q1 are connected, respectively.
또한, 본 발명의 특징부로서 과전류에 의한 NPN트랜지스터(Q2)의 파손을 방지하기 위하여 NPN트랜지스터(Q1)와 PNP트랜지스터(Q2)의 중간단에 직렬연결된 과전류보호회로부(10)가 마련되며, 상기 과전류보호회로부(10)는 상기 NPN트랜지스터(Q1)의 에미터와 PNP트랜지스터(Q2)의 에미터단에 직렬연결된 저항(R5), 상기 저항(R5)의 양단에 베이스단 및 에미터단이 각각 접속된 PNP트랜지스터(Q3)를 구비하며, 상기 PNP트랜지스터(Q3)는 컬렉터단이 PNP트랜지스터(Q2)의 베이스단에 접속되고, 또한 저항(R4)를 경유하여 NPN트랜지스터(Q1)의 베이스단에 접속된다.In addition, as a feature of the present invention, in order to prevent breakage of the NPN transistor Q2 due to overcurrent, an overcurrent protection circuit part 10 connected in series between the NPN transistor Q1 and the PNP transistor Q2 is provided. The overcurrent protection circuit 10 includes a resistor R5 connected in series to an emitter terminal of the NPN transistor Q1 and an emitter terminal of the PNP transistor Q2, and a base terminal and an emitter terminal connected to both ends of the resistor R5, respectively. A PNP transistor Q3 is provided, and the PNP transistor Q3 has a collector terminal connected to the base terminal of the PNP transistor Q2 and further connected to the base terminal of the NPN transistor Q1 via the resistor R4. .
이하에는 상기한 구성을 갖는 본 발명에 따른 모터의 구동제어회로의 동작을 상세하게 설명한다. 먼저, 구동전원(+24V)이 인가되면 저항(R3)를 통해 NPN트랜지스터(Q1)의 베이스단에는 하이신호가 인가되므로 NPN트랜지스터(Q1)는 턴온(turn on)된다. 반면, PNP트랜지스터(Q2)가 턴오프(turn off)상태이므로 모터(M)는 구동되지 않고 구동대기상태를 유지하게 된다.Hereinafter, the operation of the drive control circuit of the motor according to the present invention having the above configuration will be described in detail. First, when a driving power source (+ 24V) is applied, a high signal is applied to the base terminal of the NPN transistor Q1 through the resistor R3, so that the NPN transistor Q1 is turned on. On the other hand, since the PNP transistor Q2 is turned off, the motor M is not driven and maintains the driving standby state.
이때 외부의 입력단으로부터 하이상태의 모터구동신호가 입력되면, 저항(R1)(R2)에 의해 소정 크기로 분압된 전압에 의해 포토커플러가 구동되게 되므로 NPN트랜지스터(Q1)는 턴오프(turn off)된다. 반면, PNP트랜지스터(Q2)의 베이스단에 로우신호가 인가되므로 턴온되어 모터(M)가 구동전원을 인가받아 구동되게 된다. 이때 PNP트랜지스터(Q2)의 컬렉터단에 베이스단이 접속된 PNP트랜지스터(Q3)는 베이스단에 하이신호가 인가되게 되므로 턴오프상태를 유지하게 된다. 또한, 모터구동신호의 입력이 오프되어 포토커플러(PC)에 로우신호가 입력되면, NPN트랜지스터(Q1)는 턴온되고 PNP트랜지스터(Q2)는 턴오프되므로 모터(M)의 구동이 정지되게 된다.At this time, when the motor driving signal of the high state is input from the external input terminal, the photocoupler is driven by the voltage divided by the predetermined size by the resistors R1 and R2, so the NPN transistor Q1 is turned off. do. On the other hand, since the low signal is applied to the base end of the PNP transistor Q2, the motor M is turned on and driven by the driving power. At this time, the PNP transistor Q3 having the base end connected to the collector end of the PNP transistor Q2 maintains the turn-off state because a high signal is applied to the base end. In addition, when the input of the motor driving signal is turned off and the low signal is input to the photocoupler PC, the NPN transistor Q1 is turned on and the PNP transistor Q2 is turned off, so that driving of the motor M is stopped.
한편, 모터(M)에 과부하가 걸리거나 내부회로의 쇼트등에 의하여 과전류가 흐르게 되면, 저항(R5)에 의하여 PNP트랜지스터(Q3)가 턴온되어 그 에미터단에서 컬렉터단으로 전류가 흘러 접지로 흐르게 되므로 PNP트랜지스터(Q2)에 과전류가 인가되는 것을 방지하게 된다.On the other hand, when overcurrent flows due to the overload of the motor M or the short of the internal circuit, the PNP transistor Q3 is turned on by the resistor R5, and the current flows from the emitter stage to the collector stage to the ground. The overcurrent is prevented from being applied to the PNP transistor Q2.
이상에서 설명한 바와 같이 본 발명에 따른 모터의 구동제어회로에 의하여 모터에 과부하가 걸리거나 내부회로의 쇼트에 의하여 모터의 구동을 제어하는 트랜지스터에 과전류가 흐르는 것을 방지함으로써 트랜지스터의 파손을 방지할 수 있는 효과를 제공하게 된다.As described above, damage to the transistor can be prevented by preventing overcurrent from flowing to the transistor controlling the driving of the motor due to the overload of the motor or the short circuit of the internal circuit by the driving control circuit of the motor according to the present invention. Will provide an effect.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960015071A KR0163264B1 (en) | 1996-05-08 | 1996-05-08 | Motor driving control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960015071A KR0163264B1 (en) | 1996-05-08 | 1996-05-08 | Motor driving control circuit |
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| Publication Number | Publication Date |
|---|---|
| KR970077870A KR970077870A (en) | 1997-12-12 |
| KR0163264B1 true KR0163264B1 (en) | 1999-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960015071A KR0163264B1 (en) | 1996-05-08 | 1996-05-08 | Motor driving control circuit |
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| KR20030068270A (en) * | 2002-02-14 | 2003-08-21 | 엘지산전 주식회사 | Motor controller |
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| KR970077870A (en) | 1997-12-12 |
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