KR950014431A

KR950014431A - Dehydration tank braking device and method of washing machine

Info

Publication number: KR950014431A
Application number: KR1019930023544A
Authority: KR
Inventors: 손권
Original assignee: 이헌조; 엘지전자 주식회사
Priority date: 1993-11-06
Filing date: 1993-11-06
Publication date: 1995-06-16
Also published as: KR960014255B1

Abstract

본 발명은 세탁기의 탈수조 제동장치 및 방법에 관한 것으로, 종래에는 기구적 브레이크를 사용함으로써 그 레이크 마모에 의해 제동력이 세탁기의 사용수명에 따라 점차 감소하므로써 신뢰성이 감소하고, 브레이크구조를 내장하고 있는 클러치의 구조가 복잡해져서 재료비와 제조원가가 상승하는 문제점등이 있었다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydration tank braking apparatus and method for a washing machine. In the related art, by using a mechanical brake, the braking force gradually decreases according to the service life of the washing machine due to its rake wear. The complicated structure of the clutch has caused problems such as an increase in material cost and manufacturing cost.

따라서 종래의 문제점을 해결하기 위하여 본 발명은 탈수시 세탁기의 뚜껑을 열어 제동을 걸었을때 그때의 모터속도와 모터에 흐르는 전류를 감지하여 회생제동 및 역상제동방법으로 제동하여 제동시간을 짧게 유지하면서, 클러치를 사용하지 않아 원가상승을 방지하고, 세탁기의 안전성을 유지하도록 한다.Therefore, in order to solve the conventional problems, the present invention senses the motor speed and current flowing in the motor when braking by opening the lid of the washing machine during dehydration while braking by regenerative braking and reverse braking, while maintaining a brief braking time. Do not use the clutch to prevent the cost increase and keep the washing machine safe.

Description

Dehydration tank braking device and method of washing machine

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명 세탁기의 탈수조 제동장치 구성도.Figure 3 is a block diagram of a dehydration tank braking apparatus of the present invention washing machine.

제4도는 제3도에 있어서, 탈수시의 탈수조속도 파형도.4 is a dehydration tank speed waveform at the time of dehydration in FIG.

제5도는 본 발명 세탁기의 탈수조 제동장치 구성도로서.5 is a configuration diagram of a dehydration tank braking device of the washing machine of the present invention.

제6도는 제5도에 있어서, 제동회로부의 상세회로도로서, (a)는 발전제동 사용시의 제동회로부의 상세도이고, (b)는 희생제동 사용시의 제동회로부의 상세도이다.6 is a detailed circuit diagram of the braking circuit section in FIG. 5, (a) is a detail diagram of the braking circuit section in the use of power generation braking, and (b) is a detail diagram of the braking circuit section in the use of sacrificial braking.

제7도는 본 발명에 있어서, 모터의 각 제동방법에 따른 동작 설명도.7 is an explanatory diagram of operations according to each braking method of the motor in the present invention.

제8도는 본 발명 세탁기의 탈수조 제동방법에 대한 흐름도.8 is a flowchart illustrating a method for braking a dehydration tank of the washing machine of the present invention.

제9도는 본 발명에 있어서, BLDC모터를 사용할 경우의 제동회로부 및 인버터의 회로도.9 is a circuit diagram of a braking circuit section and an inverter when a BLDC motor is used in the present invention.

제10도는 본 발명에서 BLDC모터를 사용했을 때 제동방법에 따른 스위칭소자의 동작파형도.10 is an operation waveform diagram of a switching device according to a braking method when using a BLDC motor in the present invention.

Claims

Filter unit 11 for filtering the input AC power to a constant voltage, rectifying unit 12 for rectifying and smoothing the voltage through the filter unit 11 to the DC voltage, washing operation of the washing machine or The control unit 16 outputs a control signal for driving and braking the motor 7 during braking. When the DC voltage is input from the rectifying unit 12 and the braking signal is applied from the control unit 16, the motor 7 The brake circuit unit 13 supplies a current to the motor to have a rotation force in a direction opposite to the rotation direction, and the motor 7 rotates in a rotational direction and in a reverse direction according to the input base drive signal and the brake signal from the brake circuit unit 13. An inverter unit 14 driving in a direction, a current sensing unit 15 which senses a current flowing in the motor 7 and outputs it to the controller 16, and the inverter unit according to a driving signal of the controller 16. Base driving the transistor in (14) ET 17, a dewatering aid such device of a washing machine consisting of a motor position detecting section 18 and outputting the detection to the control unit 16 the position of the motor 7.

2. The brake circuit unit (13) according to claim 1, wherein the braking circuit unit (13) comprises a switch (S1) for switching and selecting when braking when generating braking and non-braking, and a braking resistor (Rd) for generating and braking the motor (7). A dehydration tank braking device for a washing machine.

The method of claim 1, wherein the braking circuit 13 is a capacitor for use sacrificial braking sacrifice (C _o) and, said sacrificial capacitor (C _o) over-voltage for the charging voltage remains below a predetermined voltage to the protecting portion (13 1), the sacrificial capacitor (C _o) the discharge control unit (13-2) to maintain the predetermined voltage when the charging voltage is a predetermined voltage or more to the discharge, depending on the output signal of the over-voltage protection unit (13-1) for the Dehydration tank braking device of the washing machine, characterized in that consisting of.

A first step of detecting whether the washing machine lid is open during dehydration; a second step of detecting the speed of the motor if the lid is opened in the first step; and sacrificial braking if the motor speed detected in the second step is greater than the set speed. The third step of detecting the current flowing through the motor if the operation speed is less than the set speed, and the fourth step of operating the sacrificial braking if the current sensed in the third step is greater than the set current, and operates in reverse phase braking if it is smaller than the set current. Braking method of the washing machine dehydration tank, characterized in that made.

※ Note: The disclosure is based on the initial application.