JPS62147990A - Controlling method for motor for washing machine - Google Patents

Controlling method for motor for washing machine

Info

Publication number
JPS62147990A
JPS62147990A JP60288575A JP28857585A JPS62147990A JP S62147990 A JPS62147990 A JP S62147990A JP 60288575 A JP60288575 A JP 60288575A JP 28857585 A JP28857585 A JP 28857585A JP S62147990 A JPS62147990 A JP S62147990A
Authority
JP
Japan
Prior art keywords
motor
zero
triac
current
rotation speed
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP60288575A
Other languages
Japanese (ja)
Inventor
Yoshitoyo Kenjo
見城 好豊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60288575A priority Critical patent/JPS62147990A/en
Publication of JPS62147990A publication Critical patent/JPS62147990A/en
Pending legal-status Critical Current

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  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To stabilize the rate of washing with regard to the variation of cloth quantity to be washed without the generation of electric noise, by conducting current to a motor at a zero-cross point. CONSTITUTION:By a control circuit 7, according to a first program set previously in a storage circuit 8, rotational frequency N1 after a time T4 from start is measured, and according to a second program set in the storage circuit 8, a current interruption time is determined and a TRIAC 9 is driven. By the second program, cloth quantity to be washed is estimated, and even if the cloth quantity is varied, the rate of washing can be kept almost constant. Then, by conducting current to the TRIAC 9 certainly at a current-zero point, namely, at a zero-cross point, the generation of noise can be suppressed to be almost zero.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は洗濯物量(布量)に関係なく、ほぼ一定の洗浄
率を得られる洗濯機のモニター制御方法に関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for monitoring and controlling a washing machine that allows a substantially constant washing rate to be obtained regardless of the amount of laundry (cloth amount).

電動機が使用されている。誘導電動機は、電源周波数に
よって作られる回転磁界に対し、あるすべり率を持って
回転するが、負荷(布量)が変動すると当然回転数が変
化する。従って洗浄率が変化する。
Electric motors are used. An induction motor rotates with a certain slip rate in response to a rotating magnetic field created by the power supply frequency, but as the load (cloth amount) changes, the rotation speed naturally changes. Therefore, the cleaning rate changes.

こうした事を補正するために、従来では第1図に示すモ
ーター制御装置が用いられていた。
In order to correct this, a motor control device shown in FIG. 1 has conventionally been used.

第1図において、1は回転数検知装置、2は制御回路、
3はトライアック、4はモーターである。
In FIG. 1, 1 is a rotation speed detection device, 2 is a control circuit,
3 is a triac, and 4 is a motor.

以上の構成によって、まず負荷の変動により、モーター
4の回転数が変化すると、回転数検知装置1で回転数の
変化を検知して、制御回路2にフィードバックする。制
御回路2は、トライアック3のゲートのタイミングを決
定する。通常は、第2図に示すように、モーター電流波
形の電流ゼロの点からT、遅れた点で、モーター電流が
流れるように、トライアック3のゲートを駆動するが、
モーター4の回転数が遅くなるとT、を小さくし、モー
ターの回転数が早くなるとT+に大きくして、モーター
4に流れる実効電流を制御し、モーター40回転数を一
定に保つように動作する。
With the above configuration, when the rotational speed of the motor 4 changes due to a change in load, the rotational speed detection device 1 detects the change in the rotational speed and feeds it back to the control circuit 2. The control circuit 2 determines the timing of the gate of the triac 3. Normally, as shown in Figure 2, the gate of the triac 3 is driven so that the motor current flows at a point T delayed from the zero current point of the motor current waveform.
When the rotation speed of the motor 4 becomes low, T is decreased, and when the rotation speed of the motor becomes high, T is increased to T+ to control the effective current flowing through the motor 4 and operate to keep the motor 40 rotation speed constant.

なお、第2図における斜線部分はモーター電流の遮断時
間を示す。
Note that the shaded portion in FIG. 2 indicates the cutoff time of the motor current.

発明が解決しようとする問題点 しかし、従来の構成では、大きな電気ノイズを発生する
。この理由は、第2図に示すように、モーター電流の大
きな所(ゼロクロスからT1の所)でトライアックを導
通させるため、スイッチング時のノイズが発生するため
である。このノイズは、モーター制御方法ではさけられ
ないものである。
Problems to be Solved by the Invention However, conventional configurations generate large electrical noise. The reason for this is that, as shown in FIG. 2, since the triac is made conductive at a point where the motor current is large (from zero cross to T1), noise occurs during switching. This noise cannot be avoided with motor control methods.

本発明は上記問題点に鑑み、電気ノイズの発生しない洗
濯機のモーター制御方法を提供する。
In view of the above problems, the present invention provides a method for controlling a motor of a washing machine that does not generate electrical noise.

問題点を解決するための手段 上記目的を達成するために、本発明はトライブックの導
通を、必ず電流ゼロ点、すなわちゼロクロス点で行う洗
濯機のモーター制御方法である。
Means for Solving the Problems In order to achieve the above object, the present invention provides a washing machine motor control method in which the trybook is always brought into conduction at the zero current point, that is, at the zero cross point.

作用 以上の方法によれば、導通時をゼロクロスで行うためノ
イズの発生をほぼゼロに押え、かつモーターの回転数を
制御する。また、洗浄率を一定に保つためには、布量に
応じて、回転数を変えてやる必要があるが、本発明では
、洗濯初期のモーターの回転数の立上りを検出し、それ
に基づいてそれ以降の回転数を決定する。
According to the method described above, the conduction is carried out at zero cross, so the generation of noise is suppressed to almost zero, and the rotational speed of the motor is controlled. In addition, in order to keep the washing rate constant, it is necessary to change the rotation speed depending on the amount of cloth, but in the present invention, the rise in the rotation speed of the motor at the beginning of washing is detected, and the rotation speed is changed based on that. Determine the subsequent rotation speed.

実施例 本発明の実施例を第1図、第2図および第3図により説
明する。第1図において、6はゼロクロス検知回路、7
は制御回路、8は記憶回路、9はトライアック、1oは
モーター、11は回転数検知装置、12はAC電源であ
る。
Embodiment An embodiment of the present invention will be explained with reference to FIGS. 1, 2, and 3. In FIG. 1, 6 is a zero cross detection circuit, 7
1 is a control circuit, 8 is a memory circuit, 9 is a triac, 1o is a motor, 11 is a rotation speed detection device, and 12 is an AC power source.

上記構成において、第2図に示すように、まずAC電源
12の2oプサイル分全1制御周期とする。この制御周
期の初めに、AC電源電流のゼロクロス点を起点として
、電源の半サイクル(図中で72)を単位として、必要
単位の間(図中で75)、トライアックでモーター電流
を遮断し、モーターの回転数を制御する。この遮断する
期間T3は、第3図に示すように、最初に洗濯モーター
に電圧が加えられ、そこから74時間が経過した点の回
転数N1に基づいて決定される。
In the above configuration, as shown in FIG. 2, first, one control period is set for 2o psi of the AC power source 12. At the beginning of this control cycle, starting from the zero-crossing point of the AC power supply current, the motor current is interrupted by the triac for the required unit (75 in the figure), with the unit being a half cycle of the power supply (72 in the figure), Controls the rotation speed of the motor. As shown in FIG. 3, this cut-off period T3 is determined based on the rotational speed N1 at the point where 74 hours have elapsed since voltage was first applied to the washing motor.

次に本実施例の動作について説明する。まず制御回路7
にキー人力等により洗濯が指示されると、制御回路7は
トライアック9を駆動して、モーター10にAC電源1
2を印加する。モーター1゜は、第3図に示すように、
時間の経過と共に回転数を早め、最終的には一定回転数
に達する。この回転数は、回転数検知装置11で検知さ
れ、制御回路7に入力される。制御回路7は、あらかじ
め記憶回路8に設定された第1のプログラムに従い、ス
タートから74時間経過した時点の回転数N1を測定し
、記憶回路に設定されている基準値を比較し、その差に
基づいて記憶回路8に設定された第2のプログラムに従
い、電流遮断時間T5を決定しトライアック9を駆動す
る。この第2のプログラムはN1と基準値との差により
布量を推定し、その布量で規定の洗浄率が出るように、
実験的にモーター電流遮断時間T5を求めたものをプロ
グラム化したものである。
Next, the operation of this embodiment will be explained. First, control circuit 7
When washing is instructed by a human key or the like, the control circuit 7 drives the triac 9 and connects the motor 10 to the AC power source 1.
Apply 2. Motor 1° is as shown in Figure 3.
As time passes, the number of revolutions increases and eventually reaches a certain number of revolutions. This rotational speed is detected by the rotational speed detection device 11 and input to the control circuit 7. The control circuit 7 measures the rotational speed N1 after 74 hours have elapsed from the start according to the first program preset in the memory circuit 8, compares it with the reference value set in the memory circuit, and calculates the difference between the two. Based on the second program set in the memory circuit 8, the current cutoff time T5 is determined and the triac 9 is driven. This second program estimates the amount of cloth based on the difference between N1 and the reference value, and so that the specified cleaning rate is achieved with that amount of cloth.
This is a program obtained by experimentally determining the motor current cutoff time T5.

このようにして、布量が変化しても洗浄率をほぼ一定に
保つことができる。
In this way, the cleaning rate can be kept almost constant even if the amount of cloth changes.

本実施例では、電流遮断を1制御周期の初めにまとめて
行なったが、半サイクル単位で1制御期間中に分散させ
て電流遮断をさせても、同じ効果を得ることができる。
In this embodiment, the current interruption is performed all at once at the beginning of one control period, but the same effect can be obtained even if the current interruption is performed in half-cycle units during one control period.

発明の効果 以上のように実施例から明らかなように、本発明によれ
ばゼロクロス検知回路、制御回路、記憶回路とモーター
の駆動及び停止を行うトライアックを備え、ゼロクロス
点でモーターへの導通を行うので、電気ノイズを発生す
ることなく布量の変化に対し、洗浄率を安定させること
ができる。
Effects of the Invention As is clear from the embodiments described above, according to the present invention, a zero-crossing detection circuit, a control circuit, a memory circuit, and a triac for driving and stopping the motor are provided, and conduction to the motor is established at the zero-crossing point. Therefore, the cleaning rate can be stabilized against changes in the amount of cloth without generating electrical noise.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の実施例におけるモーター制御装置のブ
C1、)り図、第2図は同装置により制御されたモータ
ー電流波形図、第3図は、モーター回転数を示す特性図
、第4図は従来のモーター制御装置のブロック図、第5
図は同装置により制御されたモータ電流波形図である。 6・・・・・・ゼロクロス検知回路、7・・・・・・制
御回路、8・・・・・記憶回路、9・・・・・・トライ
アック、10・・・・・・モーター、11・・・・・・
回転数検知装置、12・・・・・・AC電源。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 第2図 (l會Jff用刈り 第3図 因拳 第4図
Fig. 1 is a block diagram of the motor control device according to an embodiment of the present invention, Fig. 2 is a motor current waveform diagram controlled by the same device, and Fig. 3 is a characteristic diagram showing the motor rotation speed. Figure 4 is a block diagram of a conventional motor control device, and Figure 5 is a block diagram of a conventional motor control device.
The figure is a motor current waveform diagram controlled by the same device. 6... Zero cross detection circuit, 7... Control circuit, 8... Memory circuit, 9... Triac, 10... Motor, 11...・・・・・・
Rotation speed detection device, 12... AC power supply. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Fig.2

Claims (1)

【特許請求の範囲】[Claims] トライアックによりオン、オフ制御されるモーターの回
転数検知装置と、AC電源電流ゼロクロス点検知回路と
、記憶回路と、これらからの信号により、トライアック
を制御する制御回路を備え、前記制御回路はモーター回
転開始から一定時間の回転数を、記憶回路に記憶させた
基準値と比較し、この比較値に基づいて、AC電源の一
定サイクルのうち、半サイクルを単位として、必要単位
の間モーター電流をAC電流のゼロクロス点を起点に遮
断し、洗濯機の負荷量(布量)に関係なく、ほぼ一定の
洗浄率が得られる洗濯機のモーター制御方法。
A motor rotation speed detection device that is controlled on and off by the triac, an AC power supply current zero cross point detection circuit, a memory circuit, and a control circuit that controls the triac using signals from these, and the control circuit controls the motor rotation. The rotation speed for a certain period of time from the start is compared with a reference value stored in the memory circuit, and based on this comparison value, the motor current is changed to AC for the required unit, with half cycles of the specified cycle of the AC power source being set as a unit. A washing machine motor control method that cuts off the current starting at the zero-crossing point and achieves a nearly constant cleaning rate regardless of the washing machine's load (cloth amount).
JP60288575A 1985-12-20 1985-12-20 Controlling method for motor for washing machine Pending JPS62147990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60288575A JPS62147990A (en) 1985-12-20 1985-12-20 Controlling method for motor for washing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60288575A JPS62147990A (en) 1985-12-20 1985-12-20 Controlling method for motor for washing machine

Publications (1)

Publication Number Publication Date
JPS62147990A true JPS62147990A (en) 1987-07-01

Family

ID=17732036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60288575A Pending JPS62147990A (en) 1985-12-20 1985-12-20 Controlling method for motor for washing machine

Country Status (1)

Country Link
JP (1) JPS62147990A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03198899A (en) * 1989-12-27 1991-08-30 Toshiba Corp Washing machine
JPH05146579A (en) * 1991-11-28 1993-06-15 Sanyo Electric Co Ltd Washing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03198899A (en) * 1989-12-27 1991-08-30 Toshiba Corp Washing machine
JPH05146579A (en) * 1991-11-28 1993-06-15 Sanyo Electric Co Ltd Washing machine

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