KR20010056049A - apparatus for control speed of fan motor - Google Patents

apparatus for control speed of fan motor Download PDF

Info

Publication number
KR20010056049A
KR20010056049A KR1019990057450A KR19990057450A KR20010056049A KR 20010056049 A KR20010056049 A KR 20010056049A KR 1019990057450 A KR1019990057450 A KR 1019990057450A KR 19990057450 A KR19990057450 A KR 19990057450A KR 20010056049 A KR20010056049 A KR 20010056049A
Authority
KR
South Korea
Prior art keywords
fan motor
speed
voltage
rpm
zero crossing
Prior art date
Application number
KR1019990057450A
Other languages
Korean (ko)
Inventor
김신호
Original Assignee
윤종용
삼성전자 주식회사
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 윤종용, 삼성전자 주식회사 filed Critical 윤종용
Priority to KR1019990057450A priority Critical patent/KR20010056049A/en
Publication of KR20010056049A publication Critical patent/KR20010056049A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/045Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/0004Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: A speed control apparatus for fan motor is provided, in which the turn-off time of the solid state relay is changed when the sensed RPM of the fan motor is higher than the target RPM, to thereby control the fan motor at the desired RPM upon input of a low voltage. CONSTITUTION: A speed control apparatus comprises a power unit(10) for converting the AC voltage input through a power input terminal(1) into a DC voltage and outputting the converted voltage; a zero-crossing sensing unit(20) for sensing the zero-crossing where the AC voltage from the power input terminal is near the zero potential; an RPM set unit(60) for setting the target RPM of the fan motor; a solid state relay(40) which is turned on with a predetermined time delay from the zero-crossing point in accordance with the target RPM set by the RPM set unit, so as to drive the fan motor; an RPM sensing unit(50) for sensing the RPM of the fan motor; and a control unit(30) for controlling the fan motor to be maintained at the target RPM, by changing the turn-off time of the solid state relay in accordance with the result of comparison between the RPM sensed by the RPM sensing unit and the target RPM.

Description

팬모터의 속도제어장치 {apparatus for control speed of fan motor}Speed control device for fan motor {apparatus for control speed of fan motor}

본 발명은 제로크로싱 시점에 동기하여 팬모터를 제어하는 팬모터 제어장치에 관한 것으로, 특히 저전압 입력시 무접점 릴레이(Solid State Relay;SSR)의 오프시점을 변경시켜 팬모터를 원하는 회전속도(RPM)로 제어하는 팬모터의 속도제어장치에 관한 것이다.The present invention relates to a fan motor control apparatus for controlling a fan motor in synchronization with a zero crossing point. In particular, the low point input changes the off-time of a solid state relay (SSR) to allow a fan motor to have a desired rotational speed (RPM). It relates to a speed control device of a fan motor controlled by).

일반적으로, 제로크로싱 시점에 동기하여 팬모터를 제어하는 팬모터 제어장치에 있어서는, 팬모터의 PID(Proportional plus Integral plus Derivative;비례 적분 미분) 제어시 교류전압의 제로크로싱을 감지하여 제로크로싱 펄스의 하강 에지(falling edge)를 제로크로싱 시점으로 잡아 제로크로싱 위치를 감지하고, 원하는 회전속도에 따라 감지된 제로크로싱 시점으로부터 소정의 지연시간(T)을 주어 무접점 릴레이를 온하였다가 일정한 온구간(△ONt)이 지나면 무접점 릴레이를 다시 오프시키면서 팬모터를 원하는 회전속도로 제어하게 된다.In general, in a fan motor control apparatus that controls a fan motor in synchronization with a zero crossing point, a zero crossing pulse is detected by detecting zero crossing of an AC voltage during PID (Proportional plus Integral plus Derivative) control of the fan motor. By holding the falling edge as the zero crossing point, the zero crossing position is detected, and the contactless relay is turned on by giving a predetermined delay time T from the zero crossing point detected according to the desired rotation speed. After △ ON t ), the contactless relay is turned off and the fan motor is controlled at the desired rotation speed.

그런데, 이와같은 종래 팬모터 제어장치에 있어서, 저전압 입력시에는 도1(b)에 도시한 바와같이, 정상전압시(도 1(a)의 파형)보다 제로크로싱 펄스의 폭(w)이 넓어져 제로크로싱 시점으로부터 소정의 지연시간(T)을 가지고 온되는 무접점 릴레이의 온시점이 저전압 입력시에 넓어진 펄스폭(w)만큼 지연되고, 또한 일정한 온구간(△ONt)을 지나야만 오프되는 무접점 릴레이의 오프시점도 그만큼 지연되게 되는데, 무접점 릴레이의 특성상 오프시점이 지연됨에 따라 무접점 릴레이가 오프되지 않고 계속 온되어 팬모터가 고속회전하므로 팬모터를 원하는 회전속도로 제어할 수 없다는 문제점이 있었다.By the way, in the conventional fan motor controller, when the low voltage is input, as shown in FIG. 1 (b), the width w of the zero crossing pulse is wider than at the normal voltage (waveform in FIG. 1 (a)). The on-time of the solid-state relay, which has a predetermined delay time T from the time of the zero zero crossing, is delayed by a wider pulse width w at the time of low voltage input, and is turned off only after passing a constant warm interval ΔON t . The off point of the solid state relay is also delayed. Due to the nature of the solid state relay, as the off point is delayed, the solid state relay does not turn off and the fan motor rotates at high speed, so the fan motor can be controlled at a desired rotational speed. There was no problem.

따라서, 본 발명은 상술한 종래의 문제점을 해결하기 위하여 안출된 것으로, 팬모터의 회전속도를 감지하여 감지 회전속도가 목표 회전속도보다 높으면 무접점 릴레이의 오프시점을 변경시켜 팬모터의 회전속도를 일정하게 유지시킴으로서 저전압 입력시에도 팬모터를 원하는 회전속도로 제어하는 팬모터의 속도제어장치를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve the above-described problems, and if the detection speed is higher than the target rotation speed by detecting the rotation speed of the fan motor to change the off time of the contactless relay to change the rotation speed of the fan motor. It is an object of the present invention to provide a speed control device for a fan motor that maintains a constant and controls the fan motor at a desired rotational speed even at a low voltage input.

상기 목적을 달성하기 위하여 본 발명에 의한 팬모터의 속도제어장치는, 교류전압이 영전위 근처인 제로크로싱을 감지하는 제로크로싱감지수단과, 상기 제로크로싱감지수단에 의해 감지된 제로크로싱 시점에 동기하여 팬모터를 구동시키는 팬모터 제어장치에 있어서, 상기 팬모터의 목표 회전속도를 설정하는 속도설정수단과, 상기 속도설정수단에 의해 설정된 회전속도에 따라 상기 제로크로싱 시점으로부터 소정의 지연시간을 가지고 온되어 상기 팬모터를 구동시키는 무접점 릴레이와, 상기 팬모터의 회전속도를 감지하는 속도감지수단과, 상기 속도감지수단에 의해 감지된 회전속도와 목표 회전속도의 비교결과에 따라 상기 무접점 릴레이의 오프시점을 변경시켜 상기 팬모터를 목표 회전속도로 제어하는 제어수단으로 이루어진 것을 특징으로 한다.In order to achieve the above object, the speed control apparatus of a fan motor according to the present invention includes a zero crossing detection means for detecting a zero crossing in which an AC voltage is near zero potential, and synchronized with a zero crossing time detected by the zero crossing detection means. A fan motor control apparatus for driving a fan motor, comprising: a speed setting means for setting a target rotational speed of the fan motor and a predetermined delay time from the zero crossing time point in accordance with the rotational speed set by the speed setting means. A contactless relay which is turned on to drive the fan motor, a speed sensing means for sensing a rotational speed of the fan motor, and the contactless relay according to a comparison result between the rotational speed detected by the speed sensing means and a target rotational speed. Control means for controlling the fan motor at a target rotational speed by changing the off time of the do.

도 1은 종래에 의한 팬모터 제어장치의 출력파형도로서,1 is an output waveform diagram of a conventional fan motor control apparatus.

도 1(a)는 정상전압시 전파직류전압의 파형도,1 (a) is a waveform diagram of full-wave DC voltage at steady voltage;

도 1(b)는 정상전압시 제로크로싱 시점에 동기하는 무접점 릴레이의 동작파형도,1 (b) is an operation waveform diagram of a contactless relay synchronized to a zero crossing point at a steady voltage;

도 1(c)는 저전압시 전파직류전압의 파형도,1 (c) is a waveform diagram of full-wave DC voltage at low voltage,

도 1(d)는 저전압시 제로크로싱 시점에 동기하는 무접점 릴레이의 동작파형도,1 (d) is an operation waveform diagram of a contactless relay synchronized to a zero crossing point in time of low voltage;

도 2는 본 발명에 의한 팬모터의 속도제어장치의 회로구성도,2 is a circuit diagram of a speed control device for a fan motor according to the present invention;

도 3은 본 발명에 의한 팬모터 속도제어장치의 출력파형도로서,3 is an output waveform diagram of a fan motor speed control apparatus according to the present invention,

도 3(a)는 교류입력전압의 파형도,3A is a waveform diagram of an AC input voltage;

도 3(b)는 전파직류전압의 파형도,3 (b) is a waveform diagram of full-wave DC voltage;

도 3(c)는 제로크로싱 펄스의 파형도,3 (c) is a waveform diagram of a zero crossing pulse,

도 3(d)는 제로크로싱 시점에 동기하는 무접점 릴레이의 동작파형도,3 (d) is an operation waveform diagram of a solid state relay synchronized to a zero crossing point of time;

도 3(e),(f)는 무접점 릴레이의 특성상 오프되지 않고 온상태를 유지하는 동작파형도,3 (e) and 3 (f) are operation waveform diagrams of maintaining an on state without turning off due to the characteristics of a solid state relay;

도 3(g)는 무접점 릴레이의 오프시점을 변경하는 동작파형도,3 (g) is an operation waveform diagram of changing an off point of a solid state relay;

도 4는 본 발명에 의한 팬모터의 속도제어를 위한 동작순서를 도시한 플로우차트.4 is a flowchart showing an operation procedure for the speed control of the fan motor according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 전원수단 13 : 브리지정류기10: power supply means 13: bridge rectifier

20 : 제로크로싱감지수단 30 : 제어수단20: zero crossing detection means 30: control means

40 : 무접점 릴레이 50 : 속도감지수단40: solid state relay 50: speed detection means

60 : 속도설정수단60: speed setting means

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

본 발명에 의한 팬모터의 속도제어장치는, 도 2에 도시한 바와같이, 전원입력단(1)으로부터 입력되는 교류전압을 소정의 직류전압(5V)으로 변환하여 출력하는 전원수단(10)과, 상기 전원입력단(1)으로부터 입력되는 교류전압이 영전위 근처인 제로크로싱(zero-crossing)을 감지하는 제로크로싱감지수단(20)과, 상기 제로크로싱감지수단(20)으로부터 출력되는 제로크로싱 펄스(영전위 펄스신호)를 인가받아 팬모터(45)를 일정한 회전속도로 유지하기 위한 제어신호를 출력하는 제어수단(30)과, 상기 제어수단(30)으로부터 출력되는 제어신호에 따라 상기 제로크로싱감지수단(20)에 의해 감지된 제로크로싱 시점으로부터 소정의 지연시간(T)을 가지고 팬모터(45)를 구동시키는 무접점 릴레이(40)와, 상기 팬모터(45)의 회전속도를 감지하는 속도감지수단(50)과, 상기 팬모터(45)의 원하는 회전속도를 설정하는 속도설정수단(60)으로 구성되어 있다.The speed control apparatus of the fan motor according to the present invention, as shown in Fig. 2, the power supply means 10 for converting the AC voltage input from the power input terminal 1 to a predetermined DC voltage (5V) and outputs it; Zero-crossing detecting means 20 for detecting zero-crossing in which an AC voltage input from the power input terminal 1 is near zero potential, and a zero-crossing pulse output from the zero-crossing detecting means 20 ( Control means 30 for receiving a zero potential pulse signal) and outputting a control signal for maintaining the fan motor 45 at a constant rotational speed, and the zero crossing detection according to the control signal output from the control means 30. A contactless relay 40 for driving the fan motor 45 with a predetermined delay time T from the zero crossing point of time sensed by the means 20 and a speed for detecting the rotational speed of the fan motor 45. Sensing means 50, and the fan Consists of the speed setting means 60 for setting the desired rotational speed of 45.

상기 전원수단(10)은 상기 전원입력단(1)으로부터 입력되는 교류전압을 1차측에 인가받아 소정의 저전압으로 감압하여 2차측으로 유기하는 감압트랜스(11)와, 상기 감압트랜스(11)에 의해 감압된 교류전압을 소정의 직류전압으로 전파정류하는 브리지정류기(13)와, 상기 브리지정류기(13)의 출력단에 접속된 역류방지용 다이오드(D1)와, 상기 브리지정류기(13)에 의해 전파정류된 직류전압에 포함된 리플성분(저주파성분) 및 노이즈성분(고주파성분)을 필터링하는 콘덴서(C1)(C2)와, 상기 콘덴서(C1)(C2)에 의해 필터링된 직류전압을 받아서 일정레벨의 정전압(5V)을 출력하는 정전압소자(15)와, 상기 정전압소자(15)로부터 출력되는 정전압신호에 포함된 노이즈성분을 필터링하도록 상기 정전압소자(15)의 출력단에 일측이 병렬접속되고 타측이 접지된 콘덴서(C3)로 구성되어 있다.The power supply means (10) is applied by the AC voltage input from the power input terminal (1) to the primary side to reduce the voltage to a predetermined low voltage to the secondary side and the decompression transformer (11) by the decompression transformer (11) The bridge rectifier 13 for full-wave rectifying the reduced AC voltage to a predetermined DC voltage, the backflow prevention diode D1 connected to the output terminal of the bridge rectifier 13, and the full-wave rectification by the bridge rectifier 13 A capacitor C1 (C2) for filtering the ripple component (low frequency component) and noise component (high frequency component) included in the DC voltage, and a constant voltage having a constant level by receiving the DC voltage filtered by the capacitors C1 (C2). One side is connected in parallel to the output terminal of the constant voltage element 15 and the other side is grounded to filter the noise component included in the constant voltage signal output from the constant voltage element 15 and the constant voltage element 15 outputting (5V). With condenser (C3) There is sex.

상기 제로크로싱감지수단(20)은 상기 전원수단(10)의 브리지정류기(13)에 의해 전파정류된 직류전압을 분압하는 분압저항(R1)(R2)과, 상기 브리지정류기(13)에 의해 전파정류된 직류전압에 포함된 노이즈성분을 필터링하는 콘덴서(C4)와, 상기 분압저항(R1)(R2)에 의해 분압된 전압신호를 인가받아 턴온/턴오프동작하는 트랜지스터(TR1)와, 상기 트랜지스터(TR1)의 턴온동작시 교류전압의 제로크로싱에 동기하는 하이레벨의 전압신호를 상기 제어수단(30)에 입력하는 저항(R3)(R4)과, 상기 제어수단(30)에 입력되는 전압신호에 포함된 노이즈성분을 필터링하는 콘덴서(C5)로 구성되어 있다.The zero crossing detection means 20 propagates by a voltage divider R1 and R2 for dividing the DC voltage rectified by the bridge rectifier 13 of the power supply means 10 and the bridge rectifier 13. A capacitor C4 for filtering the noise component included in the rectified DC voltage, a transistor TR1 operating on / off by receiving a voltage signal divided by the voltage divider R1 and R2, and the transistor In the turn-on operation of TR1, resistors R3 and R4 for inputting a high level voltage signal in synchronization with the zero crossing of the AC voltage to the control means 30, and a voltage signal input to the control means 30. It consists of a capacitor C5 for filtering the noise component contained in.

이하, 상기와 같이 구성된 팬모터의 속도제어장치의 동작 및 그 작용효과를 설명한다.Hereinafter, the operation and effect of the speed control device of the fan motor configured as described above will be described.

도 4는 본 발명에 의한 팬모터의 속도제어를 위한 동작순서를 도시한 플로우차트로서, 도 4에서 S는 스텝(STEP)을 표시한다.4 is a flowchart showing an operation procedure for speed control of the fan motor according to the present invention, in which S denotes a step.

전원입력단(1)으로부터 도 3의 (a)에 도시한 파형의 교류전압이 전원수단(10)의 감압트랜스(11) 1차측에 인가되면, 감압트랜스(11)에서는 1차측에 인가된 교류전압을 소정의 교류전압으로 감압하여 2차측으로 유기시킨다.When the AC voltage of the waveform shown in FIG. 3A from the power input terminal 1 is applied to the primary side of the decompression transformer 11 of the power supply means 10, the AC voltage applied to the primary side in the decompression transformer 11 is applied. Is reduced to a predetermined AC voltage and induced to the secondary side.

상기 감압트랜스(11)에 의해 감압된 교류전압은 브리지정류기(13)를 통해 도 3의 (b)에 도시한 파형의 소정의 직류전압으로 전파정류되고, 브리지정류기(13)에 의해 전파정류된 직류전압에 포함된 리플성분 및 노이즈성분은 콘덴서(C1)(C2)를 통해 필터링된다.The AC voltage decompressed by the decompression transformer 11 is full-wave rectified through the bridge rectifier 13 to a predetermined DC voltage having the waveform shown in FIG. 3B, and is full-wave rectified by the bridge rectifier 13. The ripple component and noise component included in the DC voltage are filtered through the capacitors C1 and C2.

상기 콘덴서(C1)(C2)에 의해 필터링된 직류전압은 정전압소자(15)를 통해 일정레벨의 정전압(5V)으로 변환되어 제어수단(30)의 전원단자(VCC)에 입력된다.The DC voltage filtered by the capacitors C1 and C2 is converted into a constant voltage 5V at a constant level through the constant voltage device 15 and input to the power supply terminal VCC of the control means 30.

따라서, 스텝S1에서 제어수단(30)은 전원단자(VCC)에 입력된 정전압신호를 인가받아 팬모터의 속도제어장치를 초기화시킨다.Therefore, in step S1, the control means 30 receives the constant voltage signal input to the power supply terminal VCC to initialize the speed control device of the fan motor.

이때, 스텝S2에서는 사용자의 입력 또는 동작 모드에 따른 프로그램 등에 따라 속도설정수단(60)에 의해 팬모터(45)의 목표 회전속도를 설정하면, 스텝S3에서는 제로크로싱 시점에 동기하여 팬모터(45)를 구동시키도록 교류입력전압의 제로크로싱을 다음과 같이 감지한다.At this time, in step S2, if the target rotational speed of the fan motor 45 is set by the speed setting means 60 according to a user's input or a program according to an operation mode, the fan motor 45 is synchronized with the zero crossing point in step S3. The zero crossing of AC input voltage is sensed as follows.

먼저, 상기 브리지정류기(13)에 의해 전파정류된 도 3의 (b)에 도시한 파형의 직류전압이 제로크로싱감지수단(20)의 분압저항(R1)(R2)을 통해 트랜지스터(TR1)의 베이스단자에 인가되어 트랜지스터(TR1)가 턴온 또는 턴오프동작한다.First, the direct current voltage of the waveform shown in FIG. 3 (b) which is full-wave rectified by the bridge rectifier 13 is applied to the transistor TR1 through the voltage divider R1 and R2 of the zero crossing detecting means 20. The transistor TR1 is turned on or off by being applied to the base terminal.

상기 트랜지스터(TR1)가 턴온 또는 턴오프동작함에 따라 트랜지스터(TR1)의 컬렉터단으로부터 로우 또는 하이레벨의 전압신호가 제어수단(30)의, 예컨대 인터럽트단자(INT)에 입력되는데, 상기 제어수단(30)의 인터럽트단자(INT)에는 교류전압의 제로크로싱 시점에 동기하는 도 3의 (c)에 도시한 파형의 제로크로싱 펄스가입력된다.As the transistor TR1 is turned on or off, a low or high level voltage signal is input from the collector terminal of the transistor TR1 to the control terminal 30, for example, an interrupt terminal INT. The zero crossing pulse of the waveform shown in Fig. 3C is synchronized with the interrupt terminal INT of 30) in synchronization with the zero crossing time of the AC voltage.

이어서, 스텝S4에서 제어수단(30)은 상기 제로크로싱감지수단(20)으로부터 출력되는 제로크로싱 펄스(영전위 펄스신호)를 인가받아 제로크로싱 위치에서 팬모터(45)를 설정된 회전속도로 구동하기 위한 제어신호를 출력한다.Subsequently, in step S4, the control means 30 receives the zero crossing pulse (zero potential pulse signal) output from the zero crossing detecting means 20 to drive the fan motor 45 at the set rotation speed at the zero crossing position. Outputs a control signal.

따라서, 상기 제어수단(30)으로부터 출력되는 제어신호에 따라 도 3의 (d)에 도시한 바와같이, 제로크로싱 시점(제로크로싱 펄스의 하강 에지)으로부터 소정의 지연시간(T)을 가지고 무접점 릴레이(40)가 온되어 팬모터(45)를 구동시킨다.Therefore, in accordance with the control signal output from the control means 30, as shown in Fig. 3D, the contactless point has a predetermined delay time T from the zero crossing time point (falling edge of the zero crossing pulse). The relay 40 is turned on to drive the fan motor 45.

이어서, 스텝S5에서 제어수단(30)은 상기 무접점 릴레이(40)의 온구간(△ONt)이 기설정된 일정구간을 경과하였는지를 판별하여, 온구간(△ONt)이 일정구간을 경과하지 않으면(NO일 경우) 무접점 릴레이(40)를 계속 온상태로 유지시키면서 스텝S5이하의 동작을 반복수행한다.Subsequently, in step S5, the control means 30 determines whether the ON section ΔON t of the contactless relay 40 has passed a predetermined section, and the ON section ΔON t does not pass the certain section. If not (NO), the operation of step S5 or less is repeated while the contactless relay 40 is kept on.

상기 스텝S5에서의 판별결과, 무접점 릴레이(40)의 온구간(△ONt)이 일정구간을 경과하면(YES일 경우) 스텝S6으로 나아가서 제어수단(30)은 상기 팬모터(45)의 회전속도를 일정하게 유지하기 위해 무접점 릴레이(40)를 오프시켜 팬모터(45)를 정지시킨다.As a result of the discrimination in step S5, when the ON section ΔON t of the contactless relay 40 passes a certain section (YES), the flow advances to step S6, whereby the control means 30 controls the fan motor 45. In order to keep the rotation speed constant, the contactless relay 40 is turned off to stop the fan motor 45.

이때, 스텝S7에서는 상기 무접점 릴레이(40)의 온/오프에 따라 구동되는 팬모터(45)의 회전속도를 속도감지수단(50)에서 감지하여 제어수단(30)에 출력한다.At this time, in step S7 the rotational speed of the fan motor 45 driven in accordance with the on / off of the contactless relay 40 is detected by the speed detecting means 50 and output to the control means (30).

따라서, 스텝S8에서 제어수단(30)은 상기 속도감지수단(50)에 의해 감지된 팬모터(45)의 회전속도를 속도설정수단(60)에 의해 설정된 목표 회전속도와 일정시간(예, 1초) 간격으로 비교하여 감지 회전속도가 목표 회전속도보다 높은가를 판별한다.Therefore, in step S8, the control means 30 sets the rotational speed of the fan motor 45 detected by the speed sensing means 50 and the target rotational speed set by the speed setting means 60 and a predetermined time (eg, 1). Compared by second), it is determined whether the detected rotation speed is higher than the target rotation speed.

상기 스텝S8에서의 판별결과, 감지 회전속도가 목표 회전속도보다 높으면(YES일 경우) 저전압 입력으로 인하여 제로크로싱 펄스의 폭이 넓어져 팬모터(45)가 고속회전한다고 판단하고 스텝S9로 나아가서 제어수단(30)은 기설정된 초기치에서 일정값(α)을 뺀 값으로 온구간(△ONt)을 재설정하여 기설정된 온구간(△ONt)을 단축시키므로 도 3의 (g)에 도시한 바와같이, 무접점 릴레이(40)의 오프시점을 변경시키면서 상기 스텝S8로 복귀하여 스텝S8이하의 동작을 반복수행한다.As a result of the determination in step S8, if the detected rotation speed is higher than the target rotation speed (YES), the width of the zero crossing pulse is widened due to the low voltage input, and it is determined that the fan motor 45 rotates at high speed. The means 30 shortens the predetermined warming interval ΔON t by resetting the warming interval ΔON t to a value obtained by subtracting a predetermined value α from the preset initial value, so that the preset warming interval ΔON t is shortened, as shown in FIG. Similarly, the process returns to the step S8 while changing the off time of the contactless relay 40, and repeats the operation of step S8 or less.

이는, 상기 무접점 릴레이(40)의 온구간(△ONt)을 단축하여 오프시점을 변경한 후에도 감지 회전속도가 목표 회전속도보다 높으면 무접점 릴레이(40)의 오프시점을 도 3의 (g)에 도시한 바와같이, 최대한계치까지 계속해서 단축시켜 저전압 입력시에도 상기 팬모터(45)의 회전속도를 목표 회전속도로 제어하기 위함이다.This is because when the sensing rotation speed is higher than the target rotation speed even after changing the off time by shortening the ON period ΔON t of the contactless relay 40, the off point of the contactless relay 40 is shown in FIG. As shown in FIG. 9), the fan motor 45 is continuously shortened to the maximum threshold value so as to control the rotational speed of the fan motor 45 to the target rotational speed even at low voltage input.

한편, 상기 스텝S8에서의 판별결과, 감지 회전속도가 목표 회전속도보다 높지 않으면(NO일 경우) 상기 스텝S3으로 복귀하여 제로크로싱 시점에 동기하여 무접점 릴레이(40)를 온/오프시키면서 스텝S3이하의 동작을 반복수행한다.On the other hand, if it is determined in step S8 that the detected rotation speed is not higher than the target rotation speed (NO), the process returns to step S3 to turn on / off the contactless relay 40 in synchronization with the zero crossing point in time. The following operation is repeated.

상기의 설명에서와 같이 본 발명에 의한 팬모터의 속도제어장치에 의하면, 팬모터의 회전속도를 감지하여 감지 회전속도가 목표 회전속도보다 높으면 무접점릴레이의 오프시점을 변경시켜 팬모터의 회전속도를 일정하게 유지시키므로 저전압 입력시에도 팬모터를 원하는 회전속도로 제어한다는 효과가 있다.According to the speed control apparatus of the fan motor according to the present invention as described above, if the detected rotation speed is higher than the target rotation speed by detecting the rotation speed of the fan motor by changing the off time of the contactless relay the rotation speed of the fan motor Since it keeps constant, it has the effect of controlling the fan motor to the desired rotation speed even at low voltage input.

Claims (3)

교류전압이 영전위 근처인 제로크로싱을 감지하는 제로크로싱감지수단과, 상기 제로크로싱감지수단에 의해 감지된 제로크로싱 시점에 동기하여 팬모터를 구동시키는 팬모터 제어장치에 있어서,In the zero crossing detection means for detecting the zero crossing of the AC voltage near the zero potential, and the fan motor control device for driving the fan motor in synchronization with the zero crossing time detected by the zero crossing detection means, 상기 팬모터의 목표 회전속도를 설정하는 속도설정수단과,Speed setting means for setting a target rotational speed of the fan motor; 상기 속도설정수단에 의해 설정된 회전속도에 따라 상기 제로크로싱 시점으로부터 소정의 지연시간을 가지고 온되어 상기 팬모터를 구동시키는 무접점 릴레이와,A contactless relay which is turned on with a predetermined delay time from the zero crossing time point according to the rotation speed set by the speed setting means, and drives the fan motor; 상기 팬모터의 회전속도를 감지하는 속도감지수단과,Speed detecting means for detecting a rotational speed of the fan motor; 상기 속도감지수단에 의해 감지된 회전속도와 목표 회전속도의 비교결과에 따라 상기 무접점 릴레이의 오프시점을 변경시켜 상기 팬모터를 목표 회전속도로 제어하는 제어수단으로 이루어진 것을 특징으로 하는 팬모터의 속도제어장치.A control means for controlling the fan motor to a target rotational speed by changing an off point of the contactless relay according to a comparison result of the rotational speed detected by the speed sensing means and a target rotational speed of the fan motor. Speed controller. 제 1 항에 있어서,The method of claim 1, 상기 제어수단은 감지 회전속도가 목표 회전속도보다 높으면 상기 무접점 릴레의 오프시점을 단축시키는 것을 특징으로 하는 팬모터의 속도제어장치.And the control means shortens the off point of the contactless relay when the sensing rotation speed is higher than a target rotation speed. 제 1 항 또는 제 2항에 있어서,The method according to claim 1 or 2, 상기 제어수단은 상기 무접점 릴레이의 오프시점을 최대한으로 단축시키기위한 최대한계치를 설정하고 있는 것을 특징으로 하는 팬모터의 속도제어장치.And said control means sets a maximum threshold for shortening the off point of said contactless relay to the maximum.
KR1019990057450A 1999-12-14 1999-12-14 apparatus for control speed of fan motor KR20010056049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019990057450A KR20010056049A (en) 1999-12-14 1999-12-14 apparatus for control speed of fan motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019990057450A KR20010056049A (en) 1999-12-14 1999-12-14 apparatus for control speed of fan motor

Publications (1)

Publication Number Publication Date
KR20010056049A true KR20010056049A (en) 2001-07-04

Family

ID=19625647

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019990057450A KR20010056049A (en) 1999-12-14 1999-12-14 apparatus for control speed of fan motor

Country Status (1)

Country Link
KR (1) KR20010056049A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100477114B1 (en) * 2002-07-15 2005-03-17 삼성전자주식회사 Fan motor control apparatus and method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579695A (en) * 1978-12-13 1980-06-16 Mitsubishi Electric Corp Speed controller for dc motor
JPS60174086A (en) * 1984-02-15 1985-09-07 Mitsubishi Electric Corp Speed controller of induction motor
KR950012705U (en) * 1993-10-28 1995-05-17 Non-commutator Motor Drive Circuit
JPH08154392A (en) * 1994-11-29 1996-06-11 Brother Ind Ltd Control device of motor
KR19980026773A (en) * 1996-10-11 1998-07-15 구자홍 Motor system and operation control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579695A (en) * 1978-12-13 1980-06-16 Mitsubishi Electric Corp Speed controller for dc motor
JPS60174086A (en) * 1984-02-15 1985-09-07 Mitsubishi Electric Corp Speed controller of induction motor
KR950012705U (en) * 1993-10-28 1995-05-17 Non-commutator Motor Drive Circuit
JPH08154392A (en) * 1994-11-29 1996-06-11 Brother Ind Ltd Control device of motor
KR19980026773A (en) * 1996-10-11 1998-07-15 구자홍 Motor system and operation control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100477114B1 (en) * 2002-07-15 2005-03-17 삼성전자주식회사 Fan motor control apparatus and method thereof

Similar Documents

Publication Publication Date Title
JP2628642B2 (en) Automatic voltage switching power supply
US5712551A (en) Starting circuit protection apparatus and method for brushless DC motor compressor
JP2000358377A (en) Protective device for inverter
JPH1080139A (en) Power supply apparatus
KR20010056049A (en) apparatus for control speed of fan motor
JPH05168248A (en) Air-conditioner
KR100321244B1 (en) Harmonic Suppression Device of Air Conditioner and Its Suppression Method
KR0113964Y1 (en) Temperature control circuit of refrigerators using direct current motor
KR100239508B1 (en) Speed control apparatus of motor and method thereof
KR100337398B1 (en) apparatus for control speed of communication in a power line system
JP3754130B2 (en) Motor speed control circuit
KR940005470B1 (en) Over output protection apparatus of inveter microwave oven
JP2005151780A (en) Synchronous rectification control circuit, low-voltage motor drive circuit, and synchronous rectification control method
US6137242A (en) Circuit for regulating output power source according to the different open-circuit time of input AC power source and the method thereof
KR19980015028A (en) Switched Reluctance Motor Control Device and Method of Vacuum Cleaner
KR100325487B1 (en) continuously driving circuit of IR sensor
KR0114170Y1 (en) Speed control apparatus of dc motor
KR970002151Y1 (en) Small noise phase control device of ac motor
KR20000009228A (en) Induction motor driving device and its method
JP2679426B2 (en) Control method of air conditioner
JPH02142387A (en) Driver circuit for commutatorless motor
KR100337914B1 (en) Driving control circuit of a hood DC motor for a microwave oven over range
KR970002517Y1 (en) Electric operation circuits for pump
KR0179261B1 (en) Apparatus and method for resonance control of vibration type washing machine
KR200276699Y1 (en) Circuits for driving direct current motor without transformer

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application