EP1525349A2 - Verfahren bestimmen der unwucht einer w schetrommel - Google Patents
Verfahren bestimmen der unwucht einer w schetrommelInfo
- Publication number
- EP1525349A2 EP1525349A2 EP03766140A EP03766140A EP1525349A2 EP 1525349 A2 EP1525349 A2 EP 1525349A2 EP 03766140 A EP03766140 A EP 03766140A EP 03766140 A EP03766140 A EP 03766140A EP 1525349 A2 EP1525349 A2 EP 1525349A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- motor
- voltage
- speed
- current
- 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.)
- Granted
Links
Classifications
-
- 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
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
Definitions
- the invention relates to a method according to the preamble of claim 1.
- the common method for evaluating the unbalance of a loaded washing machine drum is therefore to measure the speed fluctuation caused by the unbalance in the course of a revolution with a soft speed control to a relatively low drum speed. It is disadvantageous, however, that with a high drum filling due to a correspondingly increased mass moment of inertia and with a higher nominal speed, those occurring around the nominal speed
- the invention is therefore based on the technical problem of specifying a method that promises meaningful and reproducible measured values for the drum imbalance directly before the transition from high to highest drum speeds, despite the basic problems shown.
- a washing machine 11 is equipped for treating laundry 12 in its tub with a perforated drum 13, which in this case can be set in rotation by a rotating field motor 14 about an approximately horizontal axis 15.
- the rotating field for this is impressed on the motor 14 by the alternating flow of typically three stator winding systems 16, ' which are each connected to a half-bridge circuit 17 for switching and reversing the polarity of a stator flow.
- the entirety of the bridge circuits 17 therefore acts as an inverter or inverter 18, the switching paths of which are clocked in a cyclical sequence from a higher-level controller 19 for specifying the direction of rotation and speed of the drum drive motor 14.
- Control 19 functions as a speed controller if the actual speed 20 is fed back to it in order to compare it with a desired speed 21 specified manually or from a washing program.
- Inverters 18 take place from the AC household network 22 via a converter 23 with a rectifier circuit, which is buffered towards the load by the large capacitance 25 of a so-called DC intermediate circuit 26.
- Drum speed (in particular for more effective dehumidification in the high-speed spin cycle) is permitted or prevented by the controller 19.
- the power measurement takes place according to the present invention, however, not at the connection of the consumer to the AC network 22, but in the DC supply of the inverter 18 behind the DC link 26.
- the DC 27 and the DC 28 for supplying the motor 14 via the inverter 18 becomes the vectorial Product formed and switched to the controller 19 as a time-dependent fluctuating power 29.
- This measurement leaves perform even at a very high drum speed 13 and correspondingly high-frequency fluctuating power consumption in a trouble-free and reproducible manner because interfering network influences are reliably kept away from vectorial product formation in the power measurement circuit 30 by the converter 23 and the low-pass effect of the DC link 26.
- DC output voltage 27 leads and therefore the time-dependent power consumption dP / dt of the washing machine motor 14 is proportional to the current consumption 28 over all three output phases of the inverter 18.
- a further development according to the invention has proven to be particularly advantageous in that the current measurement is carried out behind the DC link 26 to determine the unbalance at high drum speeds when the motor voltage 27 is temporarily raised, preferably temporarily switched to the greatest value (i.e. to the mains voltage) . Because at higher motor voltages and thus smaller slip, the characteristic curve of the torque and thus the electrical power P or the motor current 28 drops more steeply over the speed; and the steeper the higher the applied motor voltage 27. If the rotational speed fluctuates as a result of imbalance, the resulting fluctuation in the current 28 absorbed by the drive motor 14 of the drum 13 increases the higher the instantaneously applied motor voltage 27 is.
- the temporary increase in voltage at high speed leads to a clear, reproducibly detectable current fluctuation di / dt despite only a small - but perhaps even more constructively critical for a further increase in speed - imbalance in the drum loading.
- the given unbalance due to uneven laundry distribution should be determined from the current spin speed 12 checked again in the drum 13 and, if necessary, the spinning program can be terminated if excessive bearing forces threaten to occur.
- the speed fluctuation in the course of one revolution of the drum 13 is barely measurable and the absorption of the periodic fluctuation of the alternating current power dP / dt consumed by the drum drive 14 from the house network 22 from the network frequency and other network interferences is dominantly superimposed, according to the invention the speed-dependent fluctuation in the current consumption di / dt of the washing machine motor 14 from the DC intermediate circuit 26 before it is fed into the inverter 18 for generating the rotating field in
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Testing Of Balance (AREA)
- Treatment Of Fiber Materials (AREA)
- Centrifugal Separators (AREA)
- Drying Of Solid Materials (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10234053A DE10234053C1 (de) | 2002-07-26 | 2002-07-26 | Verfahren zum Bestimmen der Unwucht einer Wäschetrommel |
DE10234053 | 2002-07-26 | ||
PCT/EP2003/007388 WO2004013401A2 (de) | 2002-07-26 | 2003-07-09 | Verfahren bestimmen der unwucht einer wäschetrommel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1525349A2 true EP1525349A2 (de) | 2005-04-27 |
EP1525349B1 EP1525349B1 (de) | 2010-12-01 |
Family
ID=29265417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03766140A Expired - Lifetime EP1525349B1 (de) | 2002-07-26 | 2003-07-09 | Verfahren zum bestimmen der unwucht einer wäschetrommel |
Country Status (7)
Country | Link |
---|---|
US (1) | US6973392B2 (de) |
EP (1) | EP1525349B1 (de) |
AT (1) | ATE490362T1 (de) |
AU (1) | AU2003253042A1 (de) |
CA (1) | CA2492551C (de) |
DE (2) | DE10234053C1 (de) |
WO (1) | WO2004013401A2 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7905122B2 (en) * | 2003-04-28 | 2011-03-15 | Nidec Motor Corporation | Method and system for determining a washing machine load unbalance |
ES2392686T3 (es) * | 2003-06-11 | 2012-12-12 | Askoll Holding S.R.L. | Procedimiento para detectar condiciones desequilibradas de una carga giratoria accionada por un motor síncrono y para controlar dicho motor |
DE102004053216B3 (de) * | 2004-06-18 | 2006-02-09 | Diehl Ako Stiftung & Co. Kg | Vorrichtung zur Erfassung einer Schwingbewegung einer Wäschetrommel |
US8042211B2 (en) * | 2005-08-16 | 2011-10-25 | Whirlpool Corporation | Method of detecting an off-balance condition of a clothes load in a washing machine |
DE102006017530A1 (de) * | 2006-04-13 | 2007-10-18 | BSH Bosch und Siemens Hausgeräte GmbH | Maschine zum Waschen und/oder Trocknen von Wäsche sowie Verfahren zum Erfassen von Unwuchtparametern |
US20080156094A1 (en) * | 2006-12-27 | 2008-07-03 | General Electric Company | Systems and methods for detecting out-of-balance conditions in electronically controlled motors |
DE102009001271A1 (de) * | 2009-03-02 | 2010-09-09 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Ermitteln der Beladung und/oder der Unwucht einer Wäschetrommel einer Waschmaschine und entsprechende Schaltungsanordnung |
US8291764B2 (en) * | 2009-08-14 | 2012-10-23 | Lenz Michael A W | Method and apparatus for in situ unbalance and corrective balance determination for a non-vertical axis rotating assembly |
DE102009028810A1 (de) | 2009-08-21 | 2011-02-24 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Ermitteln einer Unwucht bei einer Wäschetrommel einer Waschmaschine im Schleuderbetrieb, Antriebsvorrichtung und Waschmaschine mit einer Antriebsvorrichtung |
DE102010027158B4 (de) | 2010-07-14 | 2012-06-06 | Diehl Ako Stiftung & Co. Kg | Wäschebehandlungsgerät |
DE102010042492A1 (de) | 2010-10-15 | 2012-04-19 | BSH Bosch und Siemens Hausgeräte GmbH | Antriebsvorrichtung zum Antreiben einer Komponente eines Hausgeräts, Hausgerät und Verfahren zum Betreiben eines Hausgeräts |
DE102012021747B4 (de) | 2012-06-26 | 2021-01-28 | Diehl Ako Stiftung & Co. Kg | Verfahren und Vorrichtung zum Erkennen einer Umwucht in einem Wäschebehandlungsgerät |
JP6634602B2 (ja) * | 2016-05-19 | 2020-01-22 | パナソニックIpマネジメント株式会社 | 洗濯機 |
JP6681542B2 (ja) * | 2016-05-27 | 2020-04-15 | パナソニックIpマネジメント株式会社 | 洗濯機 |
JP6681541B2 (ja) * | 2016-05-27 | 2020-04-15 | パナソニックIpマネジメント株式会社 | 洗濯機 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917175A (en) | 1959-01-22 | 1959-12-15 | Gen Electric | Unbalance sensing arrangement for machines having a centrifugal liquid extraction step |
IT1038355B (it) * | 1975-05-22 | 1979-11-20 | Ire Spa | Procedimento e macchina automatica per lavare e centrifugare la biancheria |
AT387462B (de) * | 1987-01-15 | 1989-01-25 | Austria Antriebstech | Einrichtung zur unwuchterkennung |
US4765161A (en) | 1987-10-19 | 1988-08-23 | American Laundry Machinery, Inc. | Out-of-balance control for laundry machines |
DE3822924C1 (de) | 1988-07-07 | 1989-11-23 | Miele & Cie Gmbh & Co, 4830 Guetersloh, De | |
US5070565A (en) * | 1989-04-17 | 1991-12-10 | Emerson Electric Co. | Unbalanced load detection system and method for a household appliance |
JPH0391511A (ja) | 1989-09-04 | 1991-04-17 | Mitsubishi Petrochem Co Ltd | α―オレフイン重合用触媒及びその使用 |
DE4101341A1 (de) * | 1991-01-18 | 1992-07-23 | Ako Werke Gmbh & Co | Frequenzumrichter fuer einen asynchron-drehstrommotor |
JP3091511B2 (ja) | 1991-04-12 | 2000-09-25 | 株式会社東芝 | 洗濯機 |
DE4208989A1 (de) * | 1992-03-20 | 1993-09-23 | Philips Patentverwaltung | Verfahren zur detektion und kompensation einer unwucht bei einem durch einen motor angetriebenen rotor |
DE4431846C2 (de) * | 1994-09-07 | 2001-02-15 | Diehl Ako Stiftung Gmbh & Co | Verfahren zum beladungsabhängigen Steuern und/oder Regeln einer Waschmaschine oder eines Wäschetrockners |
JPH08122192A (ja) * | 1994-10-21 | 1996-05-17 | Mitsubishi Electric Corp | 誘導電動機の負荷状態検出装置及び方法 |
KR100314179B1 (ko) * | 1999-03-26 | 2001-11-15 | 윤종용 | 세탁기의 불균형 감지장치 및 그 방법 |
DE19918331A1 (de) * | 1999-04-22 | 2000-10-26 | Bsh Bosch Siemens Hausgeraete | Verfahren und Vorrichtung zur Detektion von Unwuchten bei einem durch einen bürstenlosen Elektromotor angetriebenen Rotor |
US6418581B1 (en) * | 1999-06-24 | 2002-07-16 | Ipso-Usa, Inc. | Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine |
US6715175B2 (en) * | 2000-06-26 | 2004-04-06 | Whirlpool Corporation | Load unbalanced prediction method and apparatus in an appliance |
US6640372B2 (en) * | 2000-06-26 | 2003-11-04 | Whirlpool Corporation | Method and apparatus for detecting load unbalance in an appliance |
JP4465129B2 (ja) * | 2000-07-14 | 2010-05-19 | パナソニック株式会社 | ブラシレスモータの駆動装置と駆動方法 |
KR100425851B1 (ko) * | 2001-05-10 | 2004-04-03 | 엘지산전 주식회사 | 하나의 전류센서를 이용한 삼상 교류전류 측정 방법 |
US6594841B2 (en) * | 2001-09-21 | 2003-07-22 | Maytag Corporation | Unbalance detection system for a washing machine |
-
2002
- 2002-07-26 DE DE10234053A patent/DE10234053C1/de not_active Revoked
-
2003
- 2003-07-09 EP EP03766140A patent/EP1525349B1/de not_active Expired - Lifetime
- 2003-07-09 DE DE50313295T patent/DE50313295D1/de not_active Expired - Lifetime
- 2003-07-09 AT AT03766140T patent/ATE490362T1/de active
- 2003-07-09 WO PCT/EP2003/007388 patent/WO2004013401A2/de not_active Application Discontinuation
- 2003-07-09 AU AU2003253042A patent/AU2003253042A1/en not_active Abandoned
- 2003-07-09 CA CA002492551A patent/CA2492551C/en not_active Expired - Fee Related
-
2005
- 2005-01-21 US US11/040,805 patent/US6973392B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004013401A3 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003253042A1 (en) | 2004-02-23 |
DE50313295D1 (de) | 2011-01-13 |
DE10234053C1 (de) | 2003-11-20 |
WO2004013401A3 (de) | 2004-04-29 |
US6973392B2 (en) | 2005-12-06 |
US20050143940A1 (en) | 2005-06-30 |
ATE490362T1 (de) | 2010-12-15 |
CA2492551C (en) | 2007-11-13 |
EP1525349B1 (de) | 2010-12-01 |
CA2492551A1 (en) | 2004-02-12 |
WO2004013401A2 (de) | 2004-02-12 |
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