KR20000067549A - The speed control method of a motor during washing and rinsing in a direct drive type washing machime - Google Patents

The speed control method of a motor during washing and rinsing in a direct drive type washing machime Download PDF

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Publication number
KR20000067549A
KR20000067549A KR1019990015456A KR19990015456A KR20000067549A KR 20000067549 A KR20000067549 A KR 20000067549A KR 1019990015456 A KR1019990015456 A KR 1019990015456A KR 19990015456 A KR19990015456 A KR 19990015456A KR 20000067549 A KR20000067549 A KR 20000067549A
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South Korea
Prior art keywords
motor
washing
speed
target speed
rinsing
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KR1019990015456A
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Korean (ko)
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KR100311396B1 (en
Inventor
우경철
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구자홍
엘지전자 주식회사
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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
    • D06F37/30—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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/48—Preventing or reducing imbalance or noise
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/24—Spin speed; Drum movements
    • 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
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting

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

Abstract

PURPOSE: A method is provided to reduce noise owing to vibration and the amount of consumed power by making an acceleration slope low until vibration noise is stabilized at the early stage of a washing rinsing operation. CONSTITUTION: A method of controlling motor velocity at washing rinsing operation comprises increasing motor rotation velocity according to a first increase rate up to a vibration noise stabilization region at the early stage of a washing rinsing operation. If the increased motor rotation velocity is over predetermined velocity, the motor is accelerated according to a second increase rate. Whether the motor rotation velocity increased in the step reaches target velocity(10rpm), is judged. If so, the motor velocity is controlled so that actual motor rotation velocity reaches the target velocity. If not, the motor continues to be accelerated.

Description

직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법{THE SPEED CONTROL METHOD OF A MOTOR DURING WASHING AND RINSING IN A DIRECT DRIVE TYPE WASHING MACHIME}How to control the motor speed during washing and rinsing of the direct drive type washing machine {THE SPEED CONTROL METHOD OF A MOTOR DURING WASHING AND RINSING IN A DIRECT DRIVE TYPE WASHING MACHIME}

본 발명은 세탁헹굼시 세탁조 진동에 의한 소음을 저감시키고, 세탁헹굼 효과를 향상시키도록 한 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법에 관한 것으로, 특히 세탁헹굼 초기에는 가속기울기를 낮게하여 진동소음 안정영역까지 회전시키다가 어느 일정속도에 도달하면 그때부터 가속기울기를 높게하여 물펌핑까지의 시간을 단축하고, 목표속도 도달직전에 비례제어함으로써 목표속도 도달 이후에 정속유지하도록 하여 전력소비를 저감토록 한 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법에 관한 것이다.The present invention relates to a method of controlling the motor speed during washing rinsing of a direct-drive type automatic washing machine which reduces noise caused by washing tank vibration during washing rinsing and improves the washing rinsing effect. When rotating to the vibration noise stable area and reaching a certain speed, the acceleration slope is increased from that time, shortening the time until water pumping, and proportional control just before reaching the target speed to maintain constant speed after reaching the target speed. The present invention relates to a method of controlling the motor speed during washing and rinsing of a direct-drive type automatic washing machine that is reduced.

도 1은 종래 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법에 대한 동작 흐름도로서, 이에 도시된 바와같이, 세탁헹굼시 미리 설정한 목표속도로 모터를 회전시키기 위하여 일정한 시간주기로 PWM 듀티를 증가시키는 제1단계와, 상기 제1단계의 PWM 듀티에 의한 모터 회전속도가 목표속도에 도달했는지를 판단하는 제2단계와, 상기 제2단계에서 모터 회전속도가 목표속도에 도달하지 않았으면 계속해서 PWM 듀티를 증가시키고, 목표속도에 도달하면 실제 모터속도와 목표속도를 비교하는 제3단계와, 상기 제3단계에서 실제 모터 회전속도가 목표속도 보다 크면 PWM 듀티를 감소시키고, 실제 모터속도가 목표속도 보다 작으면 PWM 듀티를 증가시켜 비례제어를 행하는 제4단계로 이루어진다.1 is a flowchart illustrating a method of controlling a motor speed during a washing rinse of a conventional direct-driven automatic washing machine. As shown in FIG. 1, a PWM duty is increased at a predetermined time period to rotate a motor at a predetermined target speed during washing and rinsing. And a second step of determining whether the motor rotation speed by the PWM duty of the first step has reached the target speed, and if the motor rotation speed has not reached the target speed in the second step, Increasing the PWM duty and comparing the actual motor speed to the target speed when the target speed is reached, and reducing the PWM duty when the actual motor rotation speed is greater than the target speed in the third step, the actual motor speed is the target If the speed is smaller than the speed, the PWM duty is increased to perform proportional control.

도 3은 직접구동형 전자동 세탁기의 구조도로서, 이에 도시된 바와같이, 세탁기 외조(20)의 내부에 세탁 및 탈수를 위한 세탁조(10)가 회전가능하게 설치되고, 상기 세탁조(10)의 저면 중앙부에 펄세이터(40)가 회전가능하게 설치되고, 상기 세탁조(10) 및 펄세이터(40)는 외조의 저면 중앙부에 위치한 세탁조 및 펄세이터축(60)에 결합되고, 상기 세탁/탈수축(60)은 모터(50)에 결합되어 있다.3 is a structural diagram of a direct-drive type automatic washing machine, as shown in this, the washing tank 10 for washing and dehydration is rotatably installed in the washing machine outer tank 20, the bottom center of the washing tank 10 The pulsator 40 is rotatably installed, the washing tank 10 and the pulsator 40 is coupled to the washing tank and the pulsator shaft 60 located in the center of the bottom surface of the outer tank, the washing / dewatering shaft 60 ) Is coupled to the motor 50.

이와같이 구성된 종래기술에 대하여 살펴보면 다음과 같다.Looking at the prior art configured as described above is as follows.

세탁 및 간헐탈수가 완료된 상태에서, 세탁헹굼행정을 위하여 물이 세탁조(10)로 공급되는 동안 모터(60)는 정지상태가 된다.In the state where washing and intermittent dehydration are completed, the motor 60 is stopped while water is supplied to the washing tank 10 for the washing and rinsing stroke.

물의 공급이 끝나면, 미도시된 마이크로 컴퓨터의 제어에 의해 모터(50)가 구동되고, 상기 모터(50)가 구동됨에 따라 세탁조(10)가 좌, 우로 짧게 회전하게 된다.After the supply of water, the motor 50 is driven by the control of a microcomputer (not shown), and the washing tank 10 rotates shortly to the left and right as the motor 50 is driven.

이때 모터의 회전속도를 미도시된 마이크로 컴퓨터의 내부에 미리 저장되어 있는 목표속도에 도달시키기 위하여, 상기 마이크로 컴퓨터는 일정한 시간주기로 PWM 듀티를, 도 2b에서와 같이, 증가시킨다.At this time, in order to reach the target speed pre-stored in the microcomputer not shown, the microcomputer increases the PWM duty, as shown in FIG.

그러면 상기 PWM 듀티에 의해 모터의 회전속도가 증가하여 목표속도에 도달하게 된다.Then, the rotational speed of the motor is increased by the PWM duty to reach a target speed.

이렇게 하여 모터의 회전속도가 목표속도에 도달하게 되면, 실제 회전속도와 목표속도를 비교한다.When the rotational speed of the motor reaches the target speed in this way, the actual rotational speed is compared with the target speed.

비교 결과, 상기 모터의 실제 회전속도가, 도 2a에서와 같이, 목표속도 보다 Δr만큼 낮으면 도 2b에서와 같이 Δr을 목표속도에 맞추어 주기 위하여 PWM 듀티를 증가시킨다.As a result of comparison, when the actual rotational speed of the motor is lower by Δr than the target speed as in FIG. 2A, the PWM duty is increased to adjust Δr to the target speed as in FIG. 2B.

그리고, 상기 모터의 실제 회전속도가 목표속도 보다 Δr만큼 높으면, 그 Δr만큼 목표속도에 맞추어 주기 위하여 상기 PWM 듀티를 감소시킨다.If the actual rotational speed of the motor is higher by Δr than the target speed, the PWM duty is reduced to match the target speed by Δr.

이와같이 실제 회전속도와 목표속도를 비교하여 PWM 듀티를 조절함으로써, 지속적으로 목표속도를 유지할 수 있도록 한다.Thus, by adjusting the PWM duty by comparing the actual rotation speed and the target speed, it is possible to maintain the target speed continuously.

이후에 일정한 시간이 경과하면, 모터는 미도시된 마이크로 컴퓨터에 의해 정지된다.After a certain time has elapsed, the motor is stopped by a microcomputer not shown.

다시 일정한 시간이 경과하면, 마이크로 컴퓨터에 의해 모터가 구동되고 이에따라 세탁조는 좌,우로 짧게 회전하게 된다.When a certain time elapses again, the motor is driven by the microcomputer, and the washing tank rotates shortly to the left and right.

그리고 헹굼을 위한 목표속도로 모터를 회전시키기 위하여 PWM 듀티를 일정한 시간주기로 증가시킨다.The PWM duty is increased at regular time intervals to rotate the motor at the target speed for rinsing.

이와같은 동작은 설정된 헹굼횟수 만큼 반복하여 세탁헹굼 행정을 수행한다.Such an operation is repeated by the set number of rinses to perform the washing rinsing stroke.

지금까지 설명한 동작과정에 대하여 도 1에 도시한 흐름도에 의거하여 간단히 다시한번 살펴보면, 세탁헹굼시 세탁조(10)를 회전시키기 위한 모터의 회전속도를 미리 설정한 목표속도로 회전시키기 위하여 일정한 시간주기로 PWM 듀티를 증가시킨다.(S1)Referring to the operation process described so far based on the flow chart shown in FIG. 1 again, PWM is rotated at a predetermined time period to rotate the rotational speed of the motor for rotating the washing tub 10 at a predetermined target speed during washing and rinsing. Increase the duty (S1).

상기 PWM 듀티에 의한 모터의 회전속도가 목표속도에 도달했는지를 체크한다.(S2)It is checked whether the rotational speed of the motor by the PWM duty reaches the target speed. (S2)

체크 결과, 상기 모터의 회전속도가 PWM 듀티에 의해 목표속도에 도달하지 않으면 계속해서 PWM 듀티를 증가시키고, 목표속도에 도달하면 모터의 실제 회전속도와 목표속도를 비교한다.(S3)As a result of the check, if the rotation speed of the motor does not reach the target speed by the PWM duty, the PWM duty is continuously increased, and when the target speed is reached, the actual rotation speed and the target speed of the motor are compared.

비교 결과, 모터의 실제 회전속도가 목표속도 보다 높으면 PWM 듀티를 감소시켜 지속적으로 목표속도를 유지할 수 있도록 하고(S4), 상기 모터의 실제 회전속도가 목표속도 보다 낮으면 PWM 듀티를 증가시켜 지속적으로 목표속도를 유지할 수 있도록 한다.(S5)As a result of comparison, when the actual rotation speed of the motor is higher than the target speed, the PWM duty is decreased to continuously maintain the target speed (S4), and when the actual rotation speed of the motor is lower than the target speed, the PWM duty is continuously increased. To maintain the target speed (S5)

그러나 상기에서와 같은 종래기술에 있어서, 세탁헹굼시 모터의 회전속도를 초기부터 목표속도까지 상승시키기 위하여 모터를 가속시킴으로써, 세탁기에 무리가 오게되고, 진동으로 인한 소음이 발생하게 되고, 소비전력이 상승하는 문제점이 있었다.However, in the prior art as described above, by accelerating the motor to increase the rotational speed of the motor from the initial to the target speed during washing and rinsing, the washing machine is crowded, noise due to vibration occurs, power consumption There was a rising issue.

따라서 상기에서와 같은 종래의 문제점을 해결하기 위한 본 발명의 목적은 세탁헹굼 초기에 진동소음이 안정된 영역까지는 가속기울기를 작게 하여 세탁조를 회전시킴으로써 진동으로 인한 소음을 줄이고, 소비전력량을 저감시키도록 한 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법을 제공함에 있다.Therefore, an object of the present invention for solving the conventional problems as described above is to reduce the noise due to vibration by rotating the washing tank to reduce the acceleration gradient to the area where the vibration noise is stable at the beginning of the washing rinsing to reduce the power consumption The present invention provides a motor speed control method for washing and washing a direct drive type automatic washing machine.

본 발명의 다른 목적은 진동소음 안정영역까지 기울기가 작은 가속기울기로 모터속도를 가속시키다가 어느 일정 속도이상에서는 모터를 빠르게 가속시켜 물펌핑하는데 소요되는 시간을 단축하고, 세탁기에 무리가 가지 않도록 한 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법을 제공함에 있다.Another object of the present invention is to accelerate the motor speed by an acceleration slope having a small slope to the vibration noise stable area, and to accelerate the motor quickly at a certain speed or more, to shorten the time required for water pumping, and to prevent the washing machine from becoming excessive. The present invention provides a motor speed control method for washing and washing a direct drive type automatic washing machine.

도 1은 종래 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법에 대한 동작 흐름도.1 is a flowchart illustrating a method of controlling a motor speed during washing and rinsing of a conventional direct-drive type automatic washing machine.

도 2a는 종래 세탁헹굼시 시간에 대한 목표속도 제어 파형도.Figure 2a is a target speed control waveform for the time of the conventional washing rinsing.

도 2b는 종래 세탁헹굼시 시간에 대한 듀티(duty) 제어 파형도.Figure 2b is a duty control waveform for the time of the conventional washing rinse (duty).

도 3은 직접구동형 전자동 세탁기의 구조도.3 is a structural diagram of a direct drive type automatic washing machine.

도 4는 본 발명 직접구동형 전자동 세탁기의 모터 속도제어방식을 보여주는 시간에 대한 속도 파형도.Figure 4 is a speed waveform diagram of the time showing the motor speed control method of the present invention, a direct drive type automatic washing machine.

도 5는 본 발명 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법 에 대한 동작 흐름도.5 is a flowchart illustrating a method for controlling a motor speed during washing and rinsing of the present invention.

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

10 : 세탁조 20 : 외조10: washing tank 20: outer tank

30 : 외조 커버 40 : 펄세이터30: outer cover 40: pulsator

50 : 모터 60 : 세탁/탈수축50: motor 60: washing / deshrink

상기 목적을 달성하기 위한 본 발명은 세탁헹굼시 수위에 따라 설정되어 있는 진동소음 안정영역까지 제1증가율로 모터 회전속도를 서서히 증가시켜 가속하는 제1단계와, 상기 제1단계에서 증가하는 모터 회전속도가 어느 일정 속도이상이 되면 제2증가율로 빨리 증가시켜 가속하는 제2단계와, 상기 제2단계에서 증가된 모터 회전속도가 목표속도에 도달하였는지 체크하는 제3단계와, 상기 제3단계에서 목표속도에 도달하면 실제 모터 회전속도와 목표속도를 비교하여 비례제어를 행하는 제4단계와, 상기 제3단계에서 목표속도에 도달하지 않으면 계속해서 가속시키는 제5단계를 포함한 것을 특징으로 한다.The present invention for achieving the above object is a first step of gradually increasing the motor rotational speed to the first increase rate up to the vibration noise stable area is set according to the water level during washing rinsing and the motor rotation to increase in the first step A second step of rapidly increasing and accelerating at a second rate of increase when the speed exceeds a certain speed; and a third step of checking whether the motor rotation speed increased in the second step reaches a target speed; And a fourth step of performing proportional control by comparing the actual motor rotation speed with the target speed when the target speed is reached, and a fifth step of continuously accelerating when the target speed is not reached in the third step.

이하, 첨부한 도면에 의해 상세히 설명하면 다음과 같다.Hereinafter, described in detail with the accompanying drawings as follows.

도 5는 본 발명 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법에 대한 동작 흐름도로서, 이에 도시한 바와같이, 세탁헹굼 초기에 수위에 따라 미리 설정되어 있는 진동소음 안정영역까지 제1증가율로 모터 회전속도를 서서히 증가시켜 가속하는 제1단계(S101)와, 상기 제1단계(S101)에서 증가하는 모터 회전속도가 설정된 속도이상이면 제2증가율로 모터속도를 가속하는 제2단계(S102)와, 상기 제2단계(S102)에서 증가된 모터 회전속도가 목표속도-10rpm에 도달하였는지 체크하는 제3단계(S103)와, 상기 제3단계(S103)에서 목표속도-10rpm에 도달하면 실제 모터 회전속도가 목표속도에 도달하도록 속도를 제어하여 계속해서 목표속도를 유지하도록 하는 제4단계(S104)와, 상기 제3단계(S103)에서 목표속도에 도달하지 않으면 계속해서 가속시키는 제5단계를 포함한다.FIG. 5 is a flowchart illustrating a method for controlling a motor speed during washing and rinsing of the direct-drive type automatic washing machine according to the present invention. As shown in FIG. The first step (S101) to gradually increase the motor rotational speed to accelerate, and the second step (S102) to accelerate the motor speed at a second growth rate if the motor rotational speed increasing in the first step (S101) is more than the set speed; And a third step (S103) of checking whether the increased motor rotation speed reaches the target speed of -10 rpm in the second step (S102), and the actual motor when the target speed of -10 rpm is reached in the third step (S103). A fourth step S104 of controlling the speed so that the rotational speed reaches the target speed and continuing to maintain the target speed; and a fifth step of continuously accelerating if the target speed is not reached in the third step S103. artillery It is.

상기에서와 같은 방법을 수행하기 위한 직접구동형 전자동 세탁기의 구조도는, 도 3에 도시한 바와같이, 세탁기 외조(20)의 내부에 세탁 및 탈수를 위한 세탁조(10)가 회전가능하게 설치되고, 상기 세탁조(10)의 저면 중앙부에 펄세이터(40)가 회전가능하게 설치되고, 상기 세탁조(10) 및 펄세이터(40)는 외조의 저면 중앙부에 위치한 세탁/탈수축(60)에 결합되고, 상기 세탁/탈수축(60)은 모터(50)에 결합되고, 상기 세탁조(10) 회전시 세탁조내의 물을 펌핑하는 구조를 갖는 외조 커버(30)가 외조(20)에 결합되어 있다.Structural diagram of the direct drive type automatic washing machine for performing the method as described above, as shown in Figure 3, the washing tub 10 for washing and dehydration is rotatably installed in the washing machine outer tub 20, The pulsator 40 is rotatably installed in the center of the bottom of the washing tank 10, the washing tank 10 and the pulsator 40 is coupled to the washing / dehydration shaft 60 located in the center of the bottom of the outer tank, The washing / dehydrating shaft 60 is coupled to the motor 50, and the outer cover 30 having a structure for pumping water in the washing tank when the washing tank 10 rotates is coupled to the outer tank 20.

이와같이 구성된 본 발명의 동작 및 작용 효과에 대하여 상세히 설명하면 다음과 같다.Referring to the operation and effect of the present invention configured as described in detail as follows.

세탁 및 간헐탈수가 완료된 상태에서, 세탁헹굼행정을 수행하기 위하여 물이 세탁조(10)로 공급되는 동안 모터(60)는 정지상태가 된다.In the state where washing and intermittent dehydration are completed, the motor 60 is stopped while water is supplied to the washing tank 10 to perform the washing rinsing stroke.

물의 공급이 끝난 후 세탁헹굼 초기에, 미도시된 마이크로 컴퓨터의 제어에 의해 모터(50)를 좌, 우로 회전하게 되고, 이에따라 세탁조(10)도 좌, 우로 회전하게 된다.At the beginning of the washing rinsing after the supply of the water, the motor 50 is rotated left and right by the control of a microcomputer (not shown). Accordingly, the washing tank 10 is also rotated left and right.

이때 외조(20)에 외조 커버(30)를 설치하여, 세탁조(10)가 회전할 때 마다 세탁조내에서 외조측으로 흘러나온 물을 펌핑시켜 다시 세탁조내로 공급하도록 하여 세탁효과를 높이도록 한다.At this time, the outer tank cover 30 is installed in the outer tank 20, and whenever the washing tank 10 rotates, the water flowing out of the washing tank is pumped to be supplied again into the washing tank to increase the washing effect.

이와같은 원리를 세탁조 회전에 의한 물펌핑 원리라고 한다.This principle is called the water pumping principle by rotating the washing tank.

상기에서와 같이 세탁조(10)를 초기에 가속기울기를 크기하여 목표속도까지 가속하게 되면, 세탁조의 진동으로 인한 소음이 발생하는 문제가 발생한다.As described above, when the washing tank 10 is initially accelerated to an acceleration slope to a target speed, a noise occurs due to the vibration of the washing tank.

따라서 세탁조의 진동으로 인한 소음을 저감시키기 위하여, 세탁헹굼 초기에 초기가속기울기가 낮은 제1증가율로 모터를 가속시킨다.Therefore, in order to reduce the noise caused by the vibration of the washing tank, the motor is accelerated at the first rate of increase of the initial acceleration slope at the initial washing rinse.

여기서 제1증가율은, 도 4의 t1구간에 도시한 바와같이, 1duty/32msec이다.Here, the first increase rate is 1duty / 32msec, as shown in section t1 of FIG.

상기에서와 같이 초기가속기울기가 낮은 제1증가율로 모터를 진동소음이 안정된 영역까지 가속시킨다.As described above, the motor is accelerated to a region where the vibration noise is stable at a first increase rate having a low initial acceleration slope.

이때 진동소음이 안정되는 영역은 도 4에서와 같이 수위에 따라 달라지는데, 대략 100rpm 전후에 진동이 저감된다.At this time, the area in which the vibration noise is stable varies depending on the water level as shown in FIG. 4, and the vibration is reduced around 100 rpm.

상기 초기가속기울기가 낮은 제1증가율로 모터를 회전시키면, 세탁조(10)는 회전하면서 세탁조 내부의 구멍을 통해 세탁조내의 물이 외조측으로 빠져나가게 된다.When the initial acceleration slope rotates the motor at a low first increase rate, the washing tank 10 rotates so that the water in the washing tank is discharged to the outer tank side through the holes in the washing tank.

상기 제1증가율로 가속되는 모터의 회전속도가 진동 소음이 안정되는 영역까지 도달하면, 마이크로 컴퓨터는 물을 펌핑하는데 시간이 많이 소요되는 것을 막기위하여 어느 일정rpm 이상에서는 빠르게 가속시킨다.When the rotational speed of the motor accelerated to the first increase rate reaches a region where the vibration noise is stabilized, the microcomputer accelerates rapidly at a certain rpm or more to prevent time consuming pumping of water.

즉, 도 4의 t2구간에서와 같이, 진동 소음이 안정된 영역부터 목표속도에 도달하기 이전까지는 제2증가율로 가속시킨다. 여기서 제2증가율은 1duty/16msec이다.That is, as in the section t2 of FIG. 4, the acceleration is accelerated at the second increase rate until the vibration noise reaches the target speed from the stable region. The second growth rate is 1duty / 16msec.

이렇게 제1증가율보다 가속기울기가 높은 제2증가율로 모터를 가속시킴으로써, 세탁조에서 외조측으로 빠져 나간 물은 펌핑되어 외조 커버(30)를 통해 다시 세탁조(10)로 분출된다.In this way, by accelerating the motor at a second rate of increase higher than the first rate of increase, the water that escapes from the washing tank to the outer tank is pumped and jetted back to the washing tank 10 through the outer tank cover 30.

이렇게 물의 분출을 유도하여 세탁효과를 높이고, 아울러 물펌핑하는데 소요되는 시간을 단축시킨다.This induces the ejection of water to increase the washing effect, and also shorten the time required to pump the water.

그리고, 상기 제2증가율로 모터를 가속시키다가 목표속도에 도달하기 직전, 약 목표rpm-10rpm 에 도달하게 되면, 마이크로 컴퓨터는 목표속도와 현재의 모터 실제속도의 차(Δd)(듀티 증감율)를 구한다.Then, when the motor is accelerated at the second rate of increase and the target speed is about 10 rpm just before reaching the target speed, the microcomputer determines the difference Δd (duty increase / decrease rate) between the target speed and the current motor actual speed. Obtain

Δd = 목표속도 - 현재 모터속도Δd = target speed-current motor speed

이렇게 구한 듀티 증감율(Δd)로 세탁조의 회전속도를 일정하게 유지시키기 위하여 제어를 행한다.Control is performed to keep the rotational speed of the washing tank constant at the duty increase and decrease Δd thus obtained.

즉, 목표속도가 현재 모터속도 보다 높으면 듀티 증감율을 낮추고, 반대로 목표속도가 현재 모터속도 보다 낮으면 듀티 증감율을 높여주는 비례제어를 행함으로써, 목표속도에 도달한 이후 정속유지가 가능하도록 하여 소비전력량을 감소시키고, 일정한량의 물만 펑핑하도록 한다.That is, if the target speed is higher than the current motor speed, the duty increase / decrease rate is lowered. On the contrary, if the target speed is lower than the current motor speed, the proportional control is performed to increase the duty increase / decrease rate, so that the constant speed can be maintained after reaching the target speed. Reduce the pressure and allow only a certain amount of water to be pumped.

이상에서 설명한 바와같이, 세탁헹굼 초기에 초기가속기울기를 낮게하여 진동이 안정된 구간까지 가속함으로써 세탁조 진동에 의한 소음을 줄이고, 안정된 구간이 지나면 목표속도 직전까지 초기가속기울기를 높여 물펌핑 까지의 소요시간을 단축하고, 강한 물분출을 유도하에 세탁헹굼 효과를 높인다.As described above, the initial acceleration slope is lowered at the beginning of the washing rinsing to accelerate the vibration to a stable section, thereby reducing the noise caused by the vibration of the washing tank, and after the stable section, the initial acceleration slope is increased until just before the target speed. It shortens and raises the washing-rinse effect under inducing strong water jet.

그리고, 목표속도 도달직전부터 비례제어를 일정시간 동안 수행하여 목표속도 도달이후에는 정속유지가 가능하도록 함으로써, 소비전력을 줄이고, 일정한량의 물펌핑이 가능하도록 한다.In addition, the proportional control is performed for a predetermined time immediately before the target speed is reached to maintain the constant speed after the target speed is reached, thereby reducing power consumption and enabling a constant amount of water pumping.

이상에서 상세히 설명한 바와같이 본 발명은 세탁헹굼 초기에는 초기가속기울기를 낮게하여 모터를 가속시킴으로써 진동 소음을 줄이고, 이후 초기가속기울기를 높게하여 외조 커버로 강한 물분출을 유도하여 세탁효과를 높이고, 물펌핑까지의 소요시간을 단축하고, 목표속도 도달직전부터 비례제어로 목표속도 도달이후에 정속유지가 가능하도록 하여 소비전력량을 감소시키도록 한 효과가 있다.As described in detail above, the present invention reduces the vibration noise by accelerating the motor by lowering the initial acceleration slope at the initial washing rinsing period, and then increasing the initial acceleration slope to induce strong water jet into the outer cover to increase the washing effect, and water. It reduces the power consumption by shortening the time required for pumping and enabling constant speed maintenance after the target speed is reached by proportional control immediately before the target speed is reached.

Claims (2)

세탁헹굼 초기에 수위에 따라 미리 설정되어 있는 진동소음 안정영역까지 제1증가율로 모터 회전속도를 서서히 증가시켜 가속하는 제1단계와, 상기 제1단계에서 증가된 모터 회전속도가 어느 일정 속도이상이 되면 제2증가율로 모터 회전속도를 증가시켜 가속하는 제2단계와, 상기 제2단계에서 증가된 모터 회전속도가 목표속도에 도달하였는지 체크하는 제3단계와, 상기 제3단계에서 목표속도에 도달하면 실제 모터 회전속도와 목표속도를 비교하여 비례제어를 행하는 제4단계와, 상기 제3단계에서 목표속도에 도달하지 않으면 계속해서 모터속도를 증가시키는 제5단계를 포함한 것을 특징으로 하는 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법.In the initial stage of washing rinsing, the first step of accelerating by gradually increasing the motor rotational speed at a first increase rate up to the vibration noise stable area set in advance according to the water level, and the motor rotational speed increased in the first step is more than a certain speed. A second step of accelerating by increasing the motor rotational speed at a second rate of increase; and a third step of checking whether the increased motor rotational speed has reached the target speed in the second step; and reaching the target speed in the third step. And a fourth step of performing proportional control by comparing the actual motor rotation speed and the target speed, and a fifth step of continuously increasing the motor speed if the target speed is not reached in the third step. Motor speed control method for washing and rinsing the automatic washing machine. 제1항에 있어서, 제1증가율의 가속기울기는 제2증가율의 가속기울기 보다 낮게한 것을 특징으로 하는 직접구동형 전자동 세탁기의 세탁헹굼시 모터속도 제어방법.The method of claim 1, wherein the acceleration gradient of the first increase rate is lower than that of the acceleration rate of the second increase rate.
KR1019990015456A 1999-04-29 1999-04-29 The speed control method of a motor during washing and rinsing in a direct drive type washing machime KR100311396B1 (en)

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CN109667110A (en) * 2017-10-16 2019-04-23 青岛海尔滚筒洗衣机有限公司 Washing machine method of canceling noise and washing machine
KR20200003517A (en) * 2018-07-02 2020-01-10 엘지전자 주식회사 Method and apparatus for washing machine
CN113774624A (en) * 2020-06-10 2021-12-10 合肥美的洗衣机有限公司 Dehydration control method, device and computer storage medium
US11326297B2 (en) 2017-04-28 2022-05-10 Samsung Electronics Co., Ltd. Washing machine with heater and multiple tubs and control method thereof

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KR102241039B1 (en) * 2014-06-25 2021-04-15 엘지전자 주식회사 A laundry treating apparatus and a method of controlling the laundry treating apparatus

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US11326297B2 (en) 2017-04-28 2022-05-10 Samsung Electronics Co., Ltd. Washing machine with heater and multiple tubs and control method thereof
CN109667110A (en) * 2017-10-16 2019-04-23 青岛海尔滚筒洗衣机有限公司 Washing machine method of canceling noise and washing machine
KR20200003517A (en) * 2018-07-02 2020-01-10 엘지전자 주식회사 Method and apparatus for washing machine
CN113774624A (en) * 2020-06-10 2021-12-10 合肥美的洗衣机有限公司 Dehydration control method, device and computer storage medium
CN113774624B (en) * 2020-06-10 2024-03-22 合肥美的洗衣机有限公司 Dehydration control method, device and computer storage medium

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