KR100324750B1 - Brushless dc motor drive varying device and method for inverter washing machine - Google Patents
Brushless dc motor drive varying device and method for inverter washing machine Download PDFInfo
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- KR100324750B1 KR100324750B1 KR1019990023956A KR19990023956A KR100324750B1 KR 100324750 B1 KR100324750 B1 KR 100324750B1 KR 1019990023956 A KR1019990023956 A KR 1019990023956A KR 19990023956 A KR19990023956 A KR 19990023956A KR 100324750 B1 KR100324750 B1 KR 100324750B1
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- South Korea
- Prior art keywords
- motor
- voltage
- motor driving
- inverter
- current
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- 238000005406 washing Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title abstract description 8
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract description 2
- 238000009499 grossing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
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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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
-
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53875—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements 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
- H02P27/06—Arrangements 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 using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Textile Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
본 발명은 인버터 세탁기의 비엘디씨 모터 구동 전류제한 가변장치 및 방법에 관한 것으로, 종래에는 비엘디씨 모터구동 제한 전류를 고정시켜 다양한 모터 토오크에 의한 세탁 수류를 생성시키지 못하여 여러 종류의 옷감 세탁 성능을 충분히 만족시키지 못하는 문제점이 있었다. 따라서, 본 발명은 상용교류전원을 입력받아 이를 정류하는 정류부와, 그 정류부의 정류전압을 입력받아 이를 모터구동전압으로 변환하고, 그 변환값과 전류제한가변설정전압을 비교하여 그에 따른 모터전류제한신호를 출력하는 전류제한부를 구비하는 인버터 세탁기에 있어서, 상기 전류제한부는 병렬로 접속되어, 모터구동전류를 입력받아 이를 모터구동전압으로 변환하는 제1,제2 저항과; 모터구동전압을 제3 저항을 통해 비반전단자에 인가받고, 일측이 접지된 커패시터가 연결된 반전단자에 전류제한가변설정전압을 인가받아 이를 비교하는 오피앰프로 구성함으로써 다양한 세탁 수류 패턴을 만들어 세탁물의 세정도를 향상킴과 아울러 모터 온도상승을 방지하여 세탁기의 성능을 향상시킬 수 있는 효과가 있다.The present invention relates to a BCD motor drive current limiting variable device and method of the inverter washing machine, conventionally fixed to the BCD motor drive current limit to prevent the generation of washing water flow by a variety of motor torque to sufficiently clean various types of cloth washing performance There was a problem that did not satisfy. Therefore, the present invention receives a commercial AC power supply rectifier and rectifying it, and receives the rectified voltage of the rectifying unit and converts it to a motor driving voltage, and compares the converted value and the current limit variable set voltage according to the motor current limit An inverter washing machine having a current limiting unit for outputting a signal, the inverter comprising: first and second resistors connected in parallel to receive a motor driving current and convert the motor driving voltage into a motor driving voltage; The motor driving voltage is applied to the non-inverting terminal through the third resistor, and the op amp is applied to the inverting terminal connected to the grounded capacitor on one side, and configured as an op amp that compares them. In addition to improving the degree of cleaning and preventing the motor temperature rise has the effect of improving the performance of the washing machine.
Description
본 발명은 인버터 세탁기의 비엘디씨 모터 구동 전류제한 가변장치및 방법에 관한 것으로, 특히 비엘디씨모터의 구동제한 전류를 고정시키지 않고 다양한 세탁 수류 패턴을 만들어 세탁물의 세정도 향상킴과 아울러 모터 온도상승을 방지하여 세탁기의 성능을 향상시킬 수 있도록 한 인버터 세탁기의 비엘디씨 모터 구동 전류제한 가변장치 및 방법에 관한 것이다.The present invention relates to a BCD motor driving current limiting variable device and method of an inverter washing machine, and in particular, to create a variety of washing water flow patterns without fixing the drive limit current of the BCD motor to improve the cleaning of the laundry and increase the motor temperature The present invention relates to a BCD motor driving current limiting variable device and method of an inverter washer to prevent the washing machine from improving its performance.
도1은 일반적인 인버터 세탁기의 개략도이고, 도2는 일반적인 인버터 세탁기의 비엘디씨 모터구동 전류 제한장치에 대한 구성을 보인 회로도로서, 이에 도시된 바와같이 상용교류전원(AC)을 입력받아 이를 정류하는 정류부(11)와, 상기 정류부(11)의 정류신호를 평활용콘텐서(C)를 통해 평활하여 입력받아 구동신호에 의해 3상교류전원으로 변환하는 인버터부(12)와, 상기 인버터부(12)의 3상교류전원을 입력받아 그에 따라 구동되는 비엘디씨모터(M)와, 상기 비엘디씨모터(M)의 회전자의 위치를 검출하여 그에 따른 구동제어신호를 출력하는 제어부(13)와, 상기 제어부(13)의 구동제어신호를 입력받아 그에 따른 구동신호를 출력하는 구동부(14)와, 상기 인버터부(12)의 스위칭소자를 도통시키는 전류를 입력받아 이를 모터구동전압으로 변환하고, 그 모터구동전압을 미리 설정된 전류제한값과 비교하여 그에 따른 모터전류제한신호를 출력하는 전류제한부(15)로 구성되며, 이와같이 구성된 종래 장치의 동작을 설명한다.1 is a schematic diagram of a general inverter washing machine, and FIG. 2 is a circuit diagram showing a configuration of a BCD motor driving current limiting device of a general inverter washing machine. As shown therein, a rectifying unit receives a commercial AC power and rectifies it. (11), the inverter unit 12 for smoothly inputting the rectified signal of the rectifying unit 11 through the smoothing capacitor C and converting it into a three-phase AC power by a drive signal, and the inverter unit 12 And a controller 13 for detecting a position of the rotor of the BCD motor M and outputting a driving control signal according to the BCD motor M, which is driven according to the three-phase AC power supply. The driving unit 14 receives the driving control signal of the control unit 13 and outputs the driving signal according thereto, and receives a current for conducting the switching element of the inverter unit 12 and converts it into a motor driving voltage. Before motor drive An advance compared to the set current limit value and a motor current limit current-limiting section 15 for outputting a signal corresponding thereto, the operation of the conventional apparatus constructed in this manner.
먼저, 입력되는 교류전원(AC)을 정류부(11)에서 입력받아 브리지 다이오드를 이용하여 정류를 행하고, 이렇게 정류된 직류전압을 평활용 커패시터(C)로 출력시킨다.First, the AC power input AC is inputted from the rectifier 11 to perform rectification using a bridge diode, and the rectified DC voltage is output to the smoothing capacitor C.
그러면 상기 평활용 커패시터(C)는 상기 정류부(11)에서 출력되는 직류전압을 받아 평활시키고 이 평활된 전압을 인버터부(13)로 출력시킨다.Then, the smoothing capacitor C receives and smoothes the DC voltage output from the rectifying unit 11 and outputs the smoothed voltage to the inverter unit 13.
상기 인버터부(13)는 6개의 스위칭소자를 이용하여 비엘디씨모터(M)를 구동시키기 위하여 상기 평활용 커패시터(C)에서 출력되는 직류전압을 3상 교류전압(Uu,Vv,Ww)으로 변환시켜 상기 비엘디씨모터(M)로 공급한다.The inverter unit 13 converts the DC voltage output from the smoothing capacitor C into three-phase AC voltages (Uu, Vv, Ww) to drive the BC motor M using six switching elements. It is supplied to the BCD motor (M).
이에따라, 상기 비엘디씨모터(M)가 구동된다.Accordingly, the BC motor M is driven.
상기 비엘디씨모터(M)가 구동될 때, 제어부(13)는 상기 비엘디씨모터(M)의 회전자의 위치를 검출하여 그에 따른 제어신호를 구동부(14)로 출력하고, 이에 의해 상기 구동부(14)는 상기 제어부(13)의 제어신호에 따른 구동신호를 상기 인버터부(13)에 인가하여 스위칭소자의 스위칭을 제어한다.When the BCD motor M is driven, the control unit 13 detects the position of the rotor of the BCD motor M, and outputs a control signal accordingly to the drive unit 14, whereby the drive unit ( 14 controls the switching of the switching element by applying a driving signal according to the control signal of the control unit 13 to the inverter unit (13).
이때, 전류제한부(15)는 상기 인버터부(12)의 스위칭소자를 도통시키는 전류를 입력받아 이를 모터구동전압으로 변환하고, 그 모터구동전압을 미리 설정된 전류제한값과 비교하여 그에 따른 모터전류제한신호를 출력하는데, 즉 인버터부(12)의 스위칭소자를 도통시키는 전류를 병렬로 접속된 저항(R1),(R2)에 의해 전압으로 변환시킨후 그 저항(R1),(R2)의 양단전압의 차이가 미리 설정된 모터전류 제한레벨 이상이면 포토커플러(PFOTO COUPLER)를 턴온시켜 그 턴온전압을 구동부(14)에 인가하여 비엘디씨모터(M)의 회전을 일시 정지시킨다.At this time, the current limiting unit 15 receives a current for conducting the switching element of the inverter unit 12 and converts it into a motor driving voltage, and compares the motor driving voltage with a preset current limiting value, thereby limiting the motor current. Outputs a signal, that is, converts a current for conducting the switching element of the inverter unit 12 into a voltage by the resistors R1 and R2 connected in parallel and then voltages at both ends of the resistors R1 and R2. If the difference is greater than or equal to the preset motor current limit level, the photocoupler PFOTO COUPLER is turned on and the turn-on voltage is applied to the driving unit 14 to temporarily stop the rotation of the BC motor M. FIG.
이에 따라, 세탁에 불필요한 모터 회전력을 제거하게 된다.Accordingly, the motor rotational force unnecessary for washing is eliminated.
그러나, 상기와 같이 동작하는 종래 장치는 비엘디씨 모터구동 제한 전류를 고정시켜 다양한 모터 토오크에 의한 세탁 수류를 생성시키지 못하여 여러 종류의 옷감 세탁 성능을 충분히 만족시키지 못하는 문제점이 있었다.However, the conventional apparatus operating as described above has a problem in that it does not generate washing water flows due to various motor torques by fixing the BLC motor driving limit current and thus does not sufficiently satisfy various kinds of cloth washing performance.
따라서, 상기와 같은 문제점을 감안하여 창안한 본 발명은 비엘디씨모터의 구동제한 전류를 고정시키지 않고 다양한 세탁 수류 패턴을 만들어 세탁물의 세정도 향상킴과 아울러 모터 온도상승을 방지하여 세탁기의 성능을 향상시킬 수 있도록 한 인버터 세탁기의 비엘디씨 모터 구동 전류제한 가변장치및 방법을 제공함에 그 목적이 있다.Therefore, the present invention devised in view of the above problems makes the washing current of the BLC motor without fixing the driving current limit, thereby improving the washing of the laundry and preventing the motor temperature rise, thereby improving the performance of the washing machine. It is an object of the present invention to provide a variable frequency motor drive current limiting device and method of an inverter washing machine.
도1은 일반적인 인버터 세탁기의 모습을 보인 개략도.1 is a schematic view showing a state of a typical inverter washing machine.
도2는 종래 인버터 세탁기의 비엘디씨 모터 구동 전류제한장치에 대한 구성을 보인 회로도.Figure 2 is a circuit diagram showing a configuration for the BCD motor drive current limiting device of the conventional inverter washing machine.
도3은 본 발명 인버터 세탁기의 비엘디씨 모터 구동 전류제한 가변장치에 대한 구성을 보인 회로도.Figure 3 is a circuit diagram showing a configuration for a variable frequency motor drive current limiting device of the inverter washing machine of the present invention.
도4는 본 발명 인버터 세탁기의 비엘디씨 모터 구동 전류제한 가변방법에 대한 동작흐름도.Figure 4 is an operation flow diagram for a variable motor drive current limiting method of the BD DC drive washing machine of the present invention.
*****도면의 주요부분에 대한 부호의 설명********** Description of the symbols for the main parts of the drawings *****
11:정류부 12:인버터부11: Rectifier 12: Inverter
13:제어부 14:구동부13: control unit 14: driving unit
15:전류제한부 16:모터알피엠측정부15: Current limiting unit 16: Motor RPM measuring unit
상기와 같은 목적을 달성하기 위한 본 발명은,상용교류전원을 입력받아 이를 정류하는 정류부와, 그 정류부의 정류전압을 입력받아 이를 모터구동전압으로 변환하고, 그 변환값과 전류제한가변설정전압을 비교하여 그에 따른 모터전류제한신호를 출력하는 전류제한부를 구비하는 인버터 세탁기에 있어서, 상기 전류제한부는 병렬로 접속되어, 모터구동전류를 입력받아 이를 모터구동전압으로 변환하는 제1,제2 저항과; 모터구동전압을 제3 저항을 통해 비반전단자에 인가받고, 일측이 접지된 커패시터가 연결된 반전단자에 전류제한가변설정전압을 인가받아 이를 비교하는 오피앰프로 구성한 것을 특징으로 한다.The present invention for achieving the above object, the rectifying unit for receiving a commercial AC power supply and rectifying it, and receiving the rectified voltage of the rectifying unit to convert it into a motor drive voltage, and converts the converted value and the current limit variable set voltage In the inverter washing machine having a current limiting unit for outputting a motor current limiting signal according to the comparison, the current limiting unit is connected in parallel, the first and second resistors for receiving the motor driving current and converting it to the motor driving voltage; ; The motor driving voltage is applied to the non-inverting terminal through the third resistor, and an op amp for comparing the current limit variable set voltage is applied to the inverting terminal connected to the grounded capacitor at one side.
상기와 같은 목적을 달성하기 위한 본 발명은 사용자에 의해 설정된 세탁코스에 해당되는 전류제한가변설정전압과 모터구동전압을 비교하는 제1 단계와; 상기 제1 단계의 비교결과 전류제한가변설정전압이 모터구동전압보다 작으면 비엘디씨모터 회전을 일시 정지시키고, 전류제한가변설정전압이 모터구동전압보다 크거나 같으면 그대로 세탁코스를 진행하여 세탁을 완료하는 제2 단계로 수행함을 특징으로 한다.The present invention for achieving the above object comprises a first step of comparing the current limit variable set voltage and the motor driving voltage corresponding to the washing course set by the user; As a result of the comparison of the first step, if the current limit variable set voltage is smaller than the motor driving voltage, the BLC motor is temporarily stopped. If the current limit variable set voltage is greater than or equal to the motor driving voltage, the washing course is performed as it is to complete the washing. It is characterized by performing in a second step.
이하, 본 발명에 의한 인버터 세탁기의 비엘디씨 모터 구동전류제한 가변장치 및 방법에 대한 작용및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, operations and effects of the BCD motor driving current limiting variable device and method of the inverter washing machine according to the present invention will be described in detail with reference to the accompanying drawings.
도3은 본 발명 인버터 세탁기의 비엘디씨 모터 구동전류제한장치에 대한 구성을 보인 회로도로서, 이에 도시한 바와같이 상용교류전원(AC)을 입력받아 이를 정류하는 정류부(11)와; 이 정류부(11)에서 정류된 전압을 평활용커패시터(C)를 통해 입력받아 구동신호에 의해 3상교류전원으로 변환하여 비엘디씨모터(M)를 구동하는 인버터부(12)와; 상기 정류부(12)의 정류전압을 입력받아 이를 모터구동전압으로 변환하고, 그 변환값과 전류제한가변설정전압을 비교하여 그에 따른 모터전류제한신호를 출력하는 전류제한부(15)와; 비엘디씨모터(M)의 회전속도를 검출하여 그에 따른 알피엠변화신호를 출력하는 모터알피엠측정부(16)와, 상기 알피엠변화신호에 따라 비엘디씨모터(M)의 구동제어신호를 출력함과 아울러 전류제한가변설정전압을 D/A포트를 통해 출력하는 제어부(13)와; 상기 제어부(13)의 구동제어신호에 따른 구동신호를 출력하다가, 상기 전류제한부(15)의 모터전류제한신호에 의해 비엘디씨모터(M)의 회전을 일시 정지 시키도록 구동신호가 차단되는 구동부(14)로 구성한다.Figure 3 is a circuit diagram showing a configuration for the BCD motor drive current limiting device of the inverter washing machine of the present invention, as shown in the rectifier 11 for receiving a commercial AC power supply rectified; An inverter unit 12 which receives the voltage rectified by the rectifier 11 through a smoothing capacitor C and converts the voltage into a three-phase AC power by a drive signal to drive the BCD motor M; A current limiter 15 which receives the rectified voltage of the rectifier 12 and converts the rectified voltage into a motor driving voltage, compares the converted value with the current limit variable set voltage and outputs a motor current limit signal according thereto; The motor RPM measuring unit 16 detects the rotational speed of the BMC motor M and outputs the RPM change signal, and outputs the drive control signal of the BMC motor M according to the RPM change signal. A control unit 13 for outputting a current limit variable set voltage through the D / A port; The driving unit outputs a driving signal according to the driving control signal of the control unit 13, and the driving unit cuts off the driving signal to temporarily stop the rotation of the BC motor M by the motor current limiting signal of the current limiting unit 15. It consists of (14).
상기 전류제한부(15)는 병렬로 접속되어, 모터구동전류를 입력받아 이를 모터구동전압으로 변환하는 제1,제2 저항(R1),(R2)과; 모터구동전압을 제3 저항(R3)을 통해 비반전단자(+)에 인가받고, 일측이 접지된 커패시터(C1)가 연결된 반전단자(-)에 전류제한가변설정전압을 인가받아 이를 비교하는 오피앰프(OP)로 구성한다.The current limiting unit 15 is connected in parallel, the first and second resistors (R1), (R2) for receiving the motor driving current and converting it to the motor driving voltage; The motor driving voltage is applied to the non-inverting terminal (+) through the third resistor (R3), and the current limit variable set voltage is applied to the inverting terminal (-) to which the capacitor C1 connected to the ground is applied and compared. It consists of an amplifier (OP).
도4는 본 발명 인버터 세탁기의 비엘디씨 모터구동전류 제한가변방법에 대한 동작흐름도로서, 이에 도시한 바와같이 사용자에 의해 설정된 세탁코스에 해당되는 전류제한가변설정전압과 모터구동전압을 비교하는 제1 단계와; 상기 제1 단계의 비교결과 전류제한가변설정전압이 모터구동전압보다 작으면 비엘디씨모터(M) 회전을 일시 정지시키고, 전류제한가변설정전압이 모터구동전압보다 크거나 같으면 그대로 세탁코스를 진행하여 세탁을 완료하는 제2 단계로 이루어지며, 이와같은 본 발명의 동작을 설명한다.FIG. 4 is a flowchart illustrating an operation of changing the BCD motor driving current limiting method of the inverter washing machine according to the present invention. As shown in FIG. 4, a current limit variable setting voltage corresponding to a washing course set by a user and a motor driving voltage are compared. Steps; As a result of the comparison of the first step, if the current limit variable set voltage is less than the motor driving voltage, the BLC motor M is temporarily stopped, and if the current limit variable set voltage is greater than or equal to the motor driving voltage, the washing course is performed as it is. It consists of a second step of completing the washing, it will be described the operation of the present invention.
먼저, 일반적인 동작은 종래와 동일하다. 즉, 입력되는 교류전원(AC)을 정류부(11)에서 입력받아 브리지 다이오드를 이용하여 정류를 행하고, 이렇게 정류된 직류전압을 평활용 커패시터(C)로 출력시킨다.First, the general operation is the same as in the prior art. That is, the AC power input AC is inputted from the rectifier 11 to rectify using the bridge diode, and the rectified DC voltage is output to the smoothing capacitor C.
그러면 상기 평활용 커패시터(C)는 상기 정류부(11)에서 출력되는 직류전압을 받아 평활시키고 이 평활된 전압을 인버터부(13)로 출력시킨다.Then, the smoothing capacitor C receives and smoothes the DC voltage output from the rectifying unit 11 and outputs the smoothed voltage to the inverter unit 13.
상기 인버터부(13)는 6개의 스위칭소자를 이용하여 비엘디씨모터(M)를 구동시키기 위하여 상기 평활용 커패시터(C)에서 출력되는 직류전압을 3상 교류전압(Uu,Vv,Ww)으로 변환시켜 상기 비엘디씨모터(M)로 공급한다.The inverter unit 13 converts the DC voltage output from the smoothing capacitor C into three-phase AC voltages (Uu, Vv, Ww) to drive the BC motor M using six switching elements. It is supplied to the BCD motor (M).
이에따라, 상기 비엘디씨모터(M)가 구동된다.Accordingly, the BC motor M is driven.
상기 비엘디씨모터(M)가 구동될 때, 모터알피엠측정부(16)는 상기 비엘디씨모터(M)의 회전속도를 검출하여 그에 따른 알피엠변화신호를 제어부(13)로 출력하고, 상기 제어부(13)는 세탁과정에 대응하여 모터알피엠을 변화게 만드는 전류제한가변설정전압을 D/A포트를 통해 출력하고, 세탁동작이 제대로 진행되는지의 여부를 모터알피엠측정부(16)를 통해 피이드백 받아 여러단계의 세탁수류를 형성하도록 제어한다.When the BCD motor M is driven, the motor RPM measuring unit 16 detects the rotational speed of the BCD motor M and outputs the RPM change signal to the control unit 13 according to the control. 13) outputs a current limit variable setting voltage that changes the motor RF in response to the washing process through the D / A port, and receives feedback through the motor RF measuring unit 16 whether the washing operation is properly performed. Control to form several levels of washing water flow.
이때, 전류제한부(15)는 상기 인버터부(12)의 스위칭소자를 도통시키는 전류를 입력받아 이를 모터구동전압으로 변환하고, 그 변환값과 상기 제어부(13)로부터 입력된 전류제한가변설정전압을 비교하여 그에 따른 모터전류제한신호를 출력하는데, 즉 상기 인버터부(12)의 스위칭소자를 도통시키는 전류를 병렬로 접속된 저항(R1),(R2)에 의해 모터구동전압으로 변환하고, 오피앰프(OP)에서 상기 모터구동전압과 상기 전류제한가변설정전압을 비교하여 그에 따른 모터전류제한신호를 구동부(14)에 출력한다.At this time, the current limiting unit 15 receives a current for conducting the switching element of the inverter unit 12 and converts it into a motor driving voltage, and the converted value and the current limit variable setting voltage input from the control unit 13. And compares and outputs the motor current limit signal accordingly, that is, converts the current which conducts the switching element of the inverter unit 12 into the motor driving voltage by the resistors R1 and R2 connected in parallel, and The amplifier OP compares the motor driving voltage with the current limit variable setting voltage and outputs the motor current limit signal according to the driving unit 14.
그러면, 상기 구동부(14)는 상기 제어부(13)의 구동제어신호에 따른 구동신호를 상기 인버터부(12)에 출력하다가, 상기 전류제한부(15)의 모터전류제한신호에 의해 비엘디씨모터(M)의 회전을 일시 정지시키도록 구동신호가 차단되는데, 즉 전류제한가변설정전압이 모터구동전압보다 작으면 비엘디씨모터(M)의 회전을 일시 정지시키도록 구동신호가 차단되고, 상기 전류제한가변설정전압이 모터구동전압보다 크거나 같으면 그대로 세탁코스를 진행하도록 구동신호를 상기 인버터부(12)에 인가한다.Then, the driving unit 14 outputs a driving signal corresponding to the driving control signal of the control unit 13 to the inverter unit 12, and then the BCD motor (the motor current limiting signal of the current limiting unit 15). The drive signal is cut off to temporarily stop the rotation of M), that is, if the current limit variable set voltage is less than the motor drive voltage, the drive signal is cut off to temporarily stop the rotation of the BC motor M, and the current limit is limited. If the variable set voltage is greater than or equal to the motor driving voltage, a drive signal is applied to the inverter unit 12 to proceed with the washing course as it is.
다시 말해서, 본 발명은 전류제한부(15)의 오피앰프(OP)에서 모터구동전압과 전류제한가변설정전압의 비교를 통해 모터 구동전류값을 자유로이 가변가능하게 함으로써다양한 세탁수류에 필요한 모터구동토크를 얻을 수 있다.In other words, the present invention freely varies the motor drive current value by comparing the motor drive voltage and the current limit variable set voltage in the op amp OP of the current limiter 15, and thus the motor drive torque required for various washing water flows. Can be obtained.
이상에서 상세히 설명한 바와 같이 본 발명은 다양한 세탁 수류 패턴을 만들어 세탁물의 세정도를 향상킴과 아울러 모터 온도상승을 방지하여 세탁기의 성능을 향상시킬 수 있는 효과가 있다.As described in detail above, the present invention has the effect of improving the washing degree of the washing machine by improving the degree of washing of the laundry by making various washing water flow patterns and improving the performance of the washing machine.
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