KR100262880B1 - Method for sensing motor trouble of washing machine - Google Patents

Method for sensing motor trouble of washing machine Download PDF

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Publication number
KR100262880B1
KR100262880B1 KR1019970057717A KR19970057717A KR100262880B1 KR 100262880 B1 KR100262880 B1 KR 100262880B1 KR 1019970057717 A KR1019970057717 A KR 1019970057717A KR 19970057717 A KR19970057717 A KR 19970057717A KR 100262880 B1 KR100262880 B1 KR 100262880B1
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South Korea
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motor
microcomputer
washing
power
pulse
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KR1019970057717A
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Korean (ko)
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KR19990038086A (en
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박상호
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구자홍
엘지전자주식회사
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/10—Power supply arrangements, e.g. stand-by circuits
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/62—Stopping or disabling machine operation

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

PURPOSE: An abnormality detecting method of a motor in a washing machine is provided to detect an abnormality of the motor by checking a driving of the washing motor with a washing amount detecting pulse of a microcomputer. CONSTITUTION: In turning on power, power is fed to a microcomputer and electric components. In driving a motor, a spherical washing amount pulse is fed through a washing amount detecting port. In feeding the spherical washing amount pulse into the microcomputer, the microcomputer turns off the power by discriminating as damage of the washing motor or damage of circuit components in the microcomputer. In feeding the spherical pulse in a washing process, the microcomputer turns off the power. Otherwise, the microcomputer continues a following process. In feeding the spherical pulse in a dehydrating process, the microcomputer turns off the power. The microcomputer turns off the power when the spherical pulses are fed over three times to exactly discriminate an abnormality.

Description

세탁기의 모터 이상감지방법How to detect motor abnormality of washing machine

본 발명은 세탁기의 모터이상감지에 관한 것으로, 특히 세탁모터의 정지시점에서 마이콤의 포량감지펄스를 이용하여 세탁모터의 구동여부를 점검하여 모터의 이상을 감지하도록 한 세탁기의 모터 이상감지방법에 관한 것이다.The present invention relates to a motor abnormality detection of a washing machine, and more particularly, to a motor abnormality detecting method of a washing machine configured to detect an abnormality of a motor by checking whether a washing motor is driven by using a quantity detection pulse of a microcomputer at a stop of the washing motor. will be.

도 1는 세탁기의 회로블록을 나타낸 것으로, 일반적인 전자동 세탁기는, 세탁기의 전체시스템동작을 제어하는 마이컴(1)와, 입력되는 교류전압을 일정레벨의 정전압으로 변환시키어 상기 마이컴 및 세탁기의 전체시스템에 동작전원을 공급하는 전원공급부(2)와, 스위칭부, 트라이액등으로 구성되어 마이컴의 출력포트가 하이레벨일때 스위칭부의 출력이 하이레벨이 되어 트라이액의 게이트에 트러거신호를 인가하여 밸브, 모터 등의 구동을 제어하는 부하구동부(3)와, 세탁기의 각종상태를 표시하는 표시부(4)와, 세탁조내의 수위를 검출하여 상기 마이컴에 입력하는 수위감지부(5)와, 세탁조내의 포량을 감지하여 상기 마이컴에 입력하는 포량감지부(6)등으로 구성되어 있다.Figure 1 shows a circuit block of a washing machine, a general automatic washing machine, a microcomputer (1) for controlling the overall system operation of the washing machine, and converts the input AC voltage into a constant level constant voltage to the overall system of the microcomputer and the washing machine It is composed of a power supply unit 2 for supplying operation power, a switching unit, a triac, and the like. When the output port of the microcomputer is at a high level, the output of the switching unit becomes a high level to apply a trigger signal to the gate of the triac, A load driving unit 3 for controlling the driving of a motor, a display unit 4 for displaying various states of the washing machine, a water level sensing unit 5 for detecting the water level in the washing tank and inputting it into the microcomputer, and a quantity of water in the washing tank. And a quantity detecting unit 6 which detects and inputs the microcomputer to the microcomputer.

이와 같이 구성된 세탁기의 세탁과정을 설명한다.The washing process of the washing machine configured as described above will be described.

먼저, 사용자가 세탁물을 투입한 상태에서 전원을 공급하고 시작키를 누르게 되면 마이컴(1)은 세탁모터를 좌,우로 반전구동시켜 포량을 감지한 후 그 감지된 포량에 대응되는 수위를 설정하고, 급수밸브를 턴온시켜 급수를 행한다. 급수가 완료가 되면, 세탁모터를 구동시켜 세탁날개를 좌,우로 일정주기를 갖고 회전시키어 세탁행정을 진행한다. 세탁행정이 완료되면, 배수밸브를 턴온시키어 배수를 행하고, 배수가 완료되면 탈수행정을 위해 상기 세탁모터를 재기동시키어 탈수조를 회전시키어 세탁물내의 잔수를 배수밸브를 통해 배수하여 탈수한다. 이후 상기 세탁수위와 동일한 재급수를 행하고, 세탁모터를 재기동시키어 세탁날개를 좌,우로 반전시키어 헹굼행정을 진행하고, 헹굼행정이 완료되면 상기와 같이 배수를 행하고, 탈수행정을 반복한 후 세탁과정을 종료하게 된다. 상기 포량감지에 대해 상세히 설명하면, 세탁조내의 포량감지를위해, 마이컴(1)은 출력포트로 하이신호를 출력하여 부하구동부(2)의 트라이액을 턴온시키게 된다. 이에 따라 입력교류전원이 상기 트라이액을 통해 모터를 회전시키게 된다. 모터가 동작하게 되면 모터에는 일정시간동안 정상 전압이 인가됨과 아울러 포량감지부(6)에 인가되고, 포량감지부(6)는 상기 모터로부터 발생된 전압을 파형정형화하여 마이콤에 입력하게된다.First, when the user supplies power while the laundry is put in and presses the start key, the microcomputer 1 reversely drives the washing motor to the left and right to detect the quantity of water, and then sets the water level corresponding to the detected quantity of water. Turn on the water supply valve to supply water. When the water supply is completed, the washing motor is driven to rotate the washing blades to the left and right at regular intervals to proceed with the washing process. When the washing stroke is completed, the drain valve is turned on to drain the water, and when the draining is completed, the washing motor is restarted to rotate the dehydration tank for the dehydrating stroke to drain the remaining water in the laundry through the drain valve. After the same water level as the wash water, restart the washing motor to reverse the washing blades left and right to proceed with the rinsing stroke, draining as described above when the rinsing stroke is completed, the washing process after repeating the dehydration stroke Will end. In detail, the quantity detection, for the detection of the quantity in the washing tank, the microcomputer 1 outputs a high signal to the output port to turn on the triac of the load driving unit (2). Accordingly, the input AC power source rotates the motor through the triac. When the motor is operated, a normal voltage is applied to the motor for a predetermined time and is applied to the quantity detecting unit 6, and the quantity detecting unit 6 waveform-forms the voltage generated from the motor and inputs it to the microcomputer.

이후, 마이콤은 출력포트로 로우신호를 출력하여 부하구동부(3)의 트라이액을 오프시킴과 아울러 모터를 오프시키게 된다. 이때, 모터는 입력교류전압이 차단되더라도 회전의 관성력에 의해 바로 정지되지 않고 속도가 감소되면서 정지된다. 포량감지부(6)는 일정시간동안 모터의 관성력에 의해 발생되는 여력전압을 검출하여 이를 파형정형화한 후 마이컴에 입력하게 된다.Thereafter, the microcomputer outputs a low signal to the output port to turn off the triac of the load driver 3 and to turn off the motor. At this time, even if the input AC voltage is cut off, the motor is not stopped immediately by the inertia force of rotation but is stopped while the speed is decreased. The quantity detecting unit 6 detects the excitation voltage generated by the inertia force of the motor for a predetermined time, waveform-forms it, and inputs it to the microcomputer.

그런데, 마이컴의 회로부품, 트라이액, 어레이등의 소손 또는 세탁모터내 코일의 숏트, 리드와이어 결선 숏트등으로, 위와 같은 마이컴의 모터구동신호와 관계없이 세탁모터에 전원이 인가되어 계속 세탁모터가 회전하는 경우가 있다. 이와 같이, 세탁모터가 계속 구동하게 되면, 과전류발생등으로 타부품의 연쇄소손을 초래할 수 있다. 또한 정상적으로 타부품의 소손없이 구동시는 모터가 계속 구동함으로서 모터내 코일의 온도가 상승하게 되고, 코일의 온도가 일정온도이상이 되면모터의 온도보호장치가 작동하여 모터내의 전류를 강제적으로 차단하게 된다. 다시 시간이 경과하여 온도보호장치가 복귀되어 모터에 다시 전류가 흐를경우 모터가 다시 구동되어 코일온도의 재상승, 온도보호장치의 재동작등, 상기 현상이 반복되면 온도보호장치가 손상될 우려가 있다. 한편, 온도보호장치가 고장등으로 작동하지 않는 경우는 코일의 온도가 계속상승하여 화재 발생등의 사고의 우려가 있다.However, the circuit parts of the microcomputer, triac, array, etc. are burned, the coil short in the washing motor, the lead wire connection short, etc., irrespective of the motor driving signal of the microcomputer, the power is applied to the washing motor and the washing motor continues. It may rotate. As such, when the washing motor continues to be driven, overcurrent may cause chain burnout of other parts. In addition, when the motor is normally driven without damage to other parts, the temperature of the coil in the motor increases as the motor continues to run. When the temperature of the coil exceeds a certain temperature, the temperature protection device of the motor operates to forcibly cut off the current in the motor. do. If the temperature protection device is restored after a time has elapsed and the current flows in the motor again, the motor may be driven again and the temperature protection device may be damaged if the above phenomenon is repeated. . On the other hand, if the temperature protection device does not operate due to a failure or the like, there is a risk of an accident such as a fire due to the temperature of the coil continuously rising.

본 발명은 이러한 종래기술의 문제점을 해결하기 위한 것으로, 세탁모터의 정지시점에서 마이콤의 포량감지펄스를 이용하여 세탁모터의 구동여부를 점검하여 모터의 이상을 감지할 수 있는 세탁기의 모터 이상감지방법의 제공을 목적으로 한다.The present invention is to solve the problems of the prior art, the motor abnormality detection method of the washing machine that can detect the abnormality of the motor by checking whether the washing motor is driven using the quantity detection pulse of the microcomputer at the time of stopping the washing motor. For the purpose of providing

상기 목적을 달성하기 위하여, 본 발명의 세탁기의 모터 이상감지방법은, 전자동세탁기에 있어서, 세탁모터가 정지시점에, 마이컴의 포량감지 포트에 설정된 파형신호가 입력되는가를 판단하여, 설정파형신호의 입력시 세탁모터가 구동되는 것으로 판단하고, 설정파형신호의 입력이 없을시 모터가 정지된 것으로 판단하여, 세탁모터의 구동시는 전원을 차단하는 것을 특징으로 한다.In order to achieve the above object, the motor abnormality detection method of the washing machine of the present invention, in the automatic washing machine, when the washing motor is stopped, it is determined whether the waveform signal set in the quantity detection port of the microcomputer input, It is determined that the washing motor is driven at the time of input, and the motor is stopped when there is no input of the set waveform signal, and the power is cut off when the washing motor is driven.

제1도는 세탁기의 회로블록도.1 is a circuit block diagram of a washing machine.

제2도는 세탁기의 마이컴의 포량감지포트에 인가되는 펄스신호도.2 is a pulse signal diagram applied to the quantity detection port of the microcomputer of the washing machine.

제3도는 본 발명에 따른 세탁기의 모터 이상 감지방법의 흐름도.3 is a flow chart of a motor abnormality detection method of a washing machine according to the present invention.

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

1 : 마이컴 4 : 부하구동부1: microcomputer 4: load driving unit

5 : 수위감지부 6 : 키이입력부5: water level detection unit 6: key input unit

7 : 표시부7 display unit

이하, 첨부도면에 의거하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 발명의 세탁기의 모터 이상감지방법은, 도 3에 도시된 바와 같이, 세탁모터가 정지해야 할 시점에, 마이컴의 포량감지포트에 설정된 파형신호가 입력되는가를 판단하여, 설정파형신호의 입력시 세탁모터가 구동되는 것으로 판단하고, 설정파형신호의 입력이 없을 시 모터가 정지된 것으로 판단하여, 세탁모터의 구동시는 전원을 차단하는 것이다.In the washing machine motor abnormality detection method of the present invention, at the time when the washing motor should be stopped, it is determined whether the waveform signal set in the quantity detection port of the microcomputer is input, and when the set waveform signal is input. The washing motor is determined to be driven, and when there is no input of the set waveform signal, it is determined that the motor is stopped, and the power is cut off when the washing motor is driven.

이하, 본 발명의 세탁기의 모터 이상감지방법의 작용을 설명한다.Hereinafter, the operation of the motor abnormality detection method of the washing machine of the present invention will be described.

먼저, 사용자가 세탁을 하기 위해 초기 전원을 온하면, 세탁기 마이컴(1) 및 전장품에 전원이 인가되면 다음 동작을 대기한다. 이때, 마이컴의 부하구동회로의 부품소손으로 인한 트라이액 구동 및 트라이액 내부솟트로 인하여 모터가 구동되거나, 모터 코일솟트등으로 전원인가와 동시에 모터가 구동되는 경우가 있다. 모터가 구동되면, 마이컴(1)의 포량감지포트를 통해 도 2에 도시된 바와 같이 구형파의 포량펄스가 인가된다. 상기 구형파 펄스가 마이컴(1)에 인가되면, 마이컴은 세탁모터 또는 마이컴의 회로부품의 소손으로 판단하고 전원을 오프시킨다.First, when the user turns on the initial power source for washing, when power is applied to the washing machine microcomputer (1) and the electrical equipment, the next operation waits. At this time, the motor may be driven by the triac driving and the triac internal soot due to the component burnout of the load driving circuit of the microcomputer, or the motor may be driven at the same time as the power is supplied to the motor coil soot. When the motor is driven, the dose pulse of the square wave is applied as shown in FIG. 2 through the dose detection port of the microcomputer 1. When the square wave pulse is applied to the microcomputer 1, the microcomputer determines that the washing motor or the circuit component of the microcomputer is burned out and turns off the power.

한편, 세탁진행시에는 세탁완료 후 세탁모터의 휴지시간, 배수동작이 이루어질 때, 마이컴(1)이 상기 구형파 펄스가 인가되면, 마이컴은 세탁모터 또는 마이컴의 회로부품의 소손으로 판단하고 전원을 오프시키고, 상기 구형파 펄스가 인가되지않으면, 다음 진행을 행한다.On the other hand, during the washing process, when the rest time and drainage operation of the washing motor is completed, when the microcomputer 1 receives the square wave pulse, the microcomputer determines that the washing motor or the circuit components of the microcomputer are burned out and turns off the power. If the square wave pulse is not applied, the next process is performed.

한편, 탈수 진행시에도 상기 세탁진행시와 마찬가지로 탈수완료시간 후 마이컴에 상기 구형파 펄스가 인가되면, 마이컴(1)은 세탁모터 또는 마이컴의 회로부품의 소손으로 판단하고 전원을 오프시킨다.On the other hand, even when the dehydration is in progress, when the square wave pulse is applied to the microcomputer after the dehydration completion time as in the washing process, the microcomputer 1 determines that the circuit parts of the washing motor or the microcomputer are burned out and turns off the power.

한편, 부품 이상 유무를 정확히 판단하기 위해 상기 구형파 펄스가 3회이상 인가되는 경우 이상으로 판단하고 전원을 오프시키는 것이 바람직하다.On the other hand, in order to accurately determine whether there is a component abnormality, when the square wave pulse is applied three or more times, it is preferable to determine the abnormality and to turn off the power.

이상, 설명한 바와 같이, 본 발명에 따르면, 세탁모터의 정지시점에서 마이콤의 포량감지펄스를 이용하여 세탁모터의 구동여부를 점검하여 모터의 이상을 감지할 수 있다.As described above, according to the present invention, the motor may be detected by checking whether the washing motor is driven using the quantity detection pulse of the microcomputer at the time of stopping the washing motor.

Claims (2)

세탁모터가 정지해야 할 시점에서, 마이컴의 포량감지 포트에 설정된 파형신호가 입력되는가를 판단하여,상기 설정파형신호의 입력시는 세탁모터가 구동되는 것으로 판단하여, 전원을 차단하는 것을 특징으로 하는 세탁기의 모터 이상감지방법.At the time when the washing motor should be stopped, it is determined whether the waveform signal set in the quantity detection port of the microcomputer is input, and when the setting waveform signal is input, it is determined that the washing motor is driven, and the power is cut off. How to detect motor abnormality of washing machine. 제1항에 있어서, 상기 전원의 차단은, 상기 설정파형신호의 입력이 3회 이상 확인된 경우에 이루어지는 것을 특징으로 하는 세탁기의 모터 이상감지방법.The method of claim 1, wherein the power is cut off when the input of the set waveform signal is confirmed three or more times.
KR1019970057717A 1997-11-03 1997-11-03 Method for sensing motor trouble of washing machine KR100262880B1 (en)

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