EP1048774A2 - Verfahren und Vorrichtung zur Detektion von Unwuchten bei einem durch einen bürstenlosen Elektromotor angetriebenen Rotor - Google Patents
Verfahren und Vorrichtung zur Detektion von Unwuchten bei einem durch einen bürstenlosen Elektromotor angetriebenen Rotor Download PDFInfo
- Publication number
- EP1048774A2 EP1048774A2 EP00108260A EP00108260A EP1048774A2 EP 1048774 A2 EP1048774 A2 EP 1048774A2 EP 00108260 A EP00108260 A EP 00108260A EP 00108260 A EP00108260 A EP 00108260A EP 1048774 A2 EP1048774 A2 EP 1048774A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- motor
- voltage
- electric motor
- inverter
- 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
- 238000000034 method Methods 0.000 title claims description 25
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000005406 washing Methods 0.000 claims description 13
- 230000001965 increasing effect Effects 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001609 comparable effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- D06F34/08—Control circuits or arrangements thereof
-
- 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
- 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
-
- 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
- D06F2103/26—Imbalance; Noise level
-
- 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
- D06F2103/44—Current or voltage
- D06F2103/46—Current or voltage of the motor driving the drum
Definitions
- the invention relates to a method for detecting unbalance in a by a brushless electric motor driven rotor, especially one Washing drum in a washing machine, with a measuring device the speed and the unbalance of the rotor is determined by position and size.
- the invention also relates to a device for detecting unbalance.
- EP 0 565 157 A1 describes a method for the detection and compensation of a Unbalance in a rotor driven by a motor is known.
- the rotor is for example a drum in a washing machine. It is a facility for Measurement of the unbalance according to position and size and control electronics for control of the motor based on the measured values, the torque of the Motor initially constant after accelerating the rotor to a minimum value is held so that there is a change in speed if there is an unbalance, which is evaluated to determine the position and size of the unbalance. Then will based on the determined values when the speed increases, the Attempted imbalance by appropriate control.
- the minimum value to which the rotor is initially accelerated is the value at which a rotor's own imbalance is noticeable.
- the drum is first accelerated to a value of about 70 rpm or 80 rpm. This is the value at which there is laundry in the drum on the inner walls creates so that there is an imbalance due to uneven distribution of the laundry noticeable.
- the motor drive must be controlled so that a constant drive torque results.
- Determining the values for the size and location of the Imbalance occurs, for example, in that one of a rotary encoder of the motor delivered pulse chain evaluated by the electronics with the help of a pulse counter is that in the control program for the motor both the respective speed of the motor shaft and the respective location of a fictitious point on the motor shaft is available and that the speed of the rotor and the position and size of a possible unbalance the rotor can be detected.
- the pulse counter is activated by each Flank raised in the pulse chain.
- An unbalance monitor for an automatic washing machine is known from EP 0 539 617 A1 known, the one by a speed detection device in a control device monitored, speed-controlled and fed from an AC power source Electric motor, especially a series motor, upright.
- an imbalance sensor in the form of a when an is reached impermissible unbalance opening and thus the connection to the control device interrupting microswitch in series with the speed detection device switched.
- EP 0275862A1 imbalance-related fluctuations in the Current consumption of the drum drive motor detected.
- This object is achieved according to claim 1 in that after exceeding a minimum speed of the rotor is an electrical parameter of the electric motor of its dimension intended for operation to a dimension intended for measurement is changed so that the slope of the speed-torque characteristic curve The amount increases, whereby the speed of the rotor is also above during the measurement a predetermined minimum speed, and that then the unbalance after Location and size can be measured.
- the motor voltage is the parameter is selected and lowered during the measurement.
- the motor voltage can be such lower the speed-torque characteristic above the minimum speed is required for the measuring process, the speed-torque characteristic Universal motor, d. H. a serial motor, same performance.
- a universal motor in a household appliance, for example in a washing machine, against a brushless motor, in particular an asynchronous motor. Because of the different speed-torque characteristics brushless drive motors can be one Universal motor method used for measuring unbalance does not immediately affect transfer a brushless motor. There are therefore procedural steps required, for example, to adjust the speed-torque characteristic of an asynchronous motor to achieve that of a universal motor. This is the only way to replace it the drive with a speed-controlled universal motor in connection with a Triac or chopper actuator possible using an asynchronous motor, for example is supplied with a supply voltage by an inverter. It is According to the invention not required that the program control on the has to react to measured unbalance values, knowledge of the design of the drum drive, d. H. of the engine used. The unbalance values determined are comparable regardless of the drive system.
- the fixed electrical parameters occurring speed-torque characteristic changed so that their position unbalanced and size much easier to grasp.
- a laundry drum 1 (FIG. 1) is a rotor which is mounted horizontally for a while. Via a pulley 2 attached to the shaft, it is driven via a V-belt 3 by an asynchronous motor 4, the drive shaft of which also has a pulley over which the V-belt 3 runs.
- the motor controller 7 is part of a converter 8.
- the motor controller 7 is preferably part a microcontroller in which the functions of the motor controller 7, namely the Generation of the generation of the voltage provided with the reference numerals 13 and 14 and the rotating field frequency are integrated.
- the microcontroller also contains the Summation point 16 and multiplication point 17. On the microcontroller is preferably also the control scheme is stored.
- the microcontroller contains preferably a memory, for example a ROM.
- the converter 8 includes one the voltage 9 of an AC voltage-applied filter 10, the Line voltage superimposed harmonics and high-frequency electromagnetic interference filtered out.
- An intermediate circuit 11 is arranged downstream of the filter 10, in which one is not here Rectifier bridge shown serves to rectify the mains voltage 9, the Rectifier bridge is preferably connected downstream of a smoothing capacitor.
- the of the DC link 10 generated DC voltage is used on the one hand for Power supply to a multi-phase electronic commutator, d. H. one Inverter 12, three out of phase with each other from the DC voltage AC voltages R, S, T generated for the asynchronous motor 4.
- the inverter 12 also includes controllable power transistors, not shown, e.g. IGBT's. Inverters of the type described above mainly work with sinus-weighted pulse width modulation according to the so-called Undershoot method, i.e. by means of the higher frequency pulse width modulation frequency becomes a lower AC voltage or 3 phase AC voltage (motor voltage) shown.
- the inverter 12 is regulated by the motor controller 7, the regulation of the Speed of the asynchronous motor 4 via the manipulated variables formed in the motor controller 7 for the Motor voltage or the rotating field frequency of the inverter 12 takes place, which in Fig. 1, reference numerals 13 and 14 are assigned for illustration.
- Power supply 15 which in turn z. B. from the intermediate circuit 11 with DC voltage becomes.
- the laundry drum 1 is initially used to initiate the spinning process Distribution ramp accelerated to a speed at which the laundry due to the centrifugal forces rests on the inner surface of the drum 1.
- the measuring speed is Avoidance of mechanical resonances above 70 rpm, preferably between 80 and 100 rpm of the laundry drum 1.
- the shape of the distribution ramp is determined by the speed-controlled operation of the asynchronous motor 4 by the inverter 12 certainly.
- the speed behavior of the asynchronous motor 4 can thereby Inverters 12 can be influenced according to the following method:
- a voltage-frequency characteristic for the is in a memory, not shown here
- Asynchronous motor 4 stored, which is supplied to the inverter 12 as a reference variable is, so that the inverter 12 from it the motor voltage U, consisting of the three partial voltages R, S, T, which are out of phase with one another, and the motor speed wins.
- the actual speed n actual of the asynchronous motor 4 is compared at a summation point 16 with the target speed n target .
- the control difference obtained from this is fed to the motor controller 7, which uses this to obtain signal variables for the voltage control element 13 and the speed control element 14.
- the motor current or the motor voltage dropping in the motor windings can also be measured and compared with corresponding target values for the current or the voltage and a corresponding control circuit as reference variables be fed.
- a slip control, a flow-oriented current control, a control based on the rotating field vector can be provided for the asynchronous motor 4 using mathematical motor models or the like.
- the voltage and the speed or the rotating field frequency for the asynchronous motor 4 are formed as manipulated variables.
- the assignment between motor voltage and rotating field frequency is either at Control based on characteristics stored in a memory, or it is determined by a control algorithm such as that shown in FIG. 1 Control loop. Due to the usual design of the engine operation for an optimal Engine utilization and good efficiency with good dynamics at the same time does not meet the requirements for the unbalance detection task. Therefore at Reaching the speed of more than 70 rpm regulating the speed for that Speed actuator 14 or its control turned off, and the fixed value, the Measuring speed corresponds to the speed frequency of the asynchronous motor 4 is maintained.
- the value for the motor voltage U is reduced according to the following criterion.
- the load moment caused by the weight of laundry and water drops to approximately one tenth of the torque required in normal washing operation. Therefore, the electric power supplied to the electric motor and, accordingly, the torque of the motor generated therefrom can be considerably reduced.
- the following relationship applies to the maximum achievable torque m k :
- the maximum achievable torque in the case of an asynchronous motor, the maximum achievable torque, the so-called overturning moment m k , depends on the square of the motor voltage U, on the square of the magnetic reversal frequency and on a motor-specific constant c 1 .
- the overturning moment m k occurring in the course of the torque (m) -speed (n) characteristic curve is associated with the overturning slip s k as the relative difference between the stator and rotor rotational frequency.
- the tilt slip s k is a second motor-specific variable.
- the limit of the voltage drop results from the maximum torque occurring at the measuring point, ie the breakdown torque m k , must always be greater than the load torque m d by a safety factor for the overload capability. A start-up with the lowered voltage is usually not possible.
- the rotating field frequency can be increased.
- the motor voltage U decreases Reaching the application of the laundry on the outer surface of the laundry drum 1 constant held and the rotating field frequency increased until the measuring speed is reached.
- the Explanation of this possibility follows from the fact that at constant Motor voltage U with increasing magnetic or rotating field frequency inductive reactances of the motor 4 also increase and thus the motor current and thus reduce the engine stall torque.
- the engine stall torque is reversed proportional to the square of the magnetic reversal frequency.
- the motor voltage U depending on the grid voltage currently applied to the inverter 12 and of the winding temperature can be made.
- the winding temperature of the asynchronous motor 4 is determined, for example, by a Detected temperature sensor, which converts them into an electrical signal and via a Signal line feeds the engine controller 7.
- the controller 7 there is, for example, a table stored with temperature values from which by comparison with that by the sensor measured temperature the motor voltage in the unbalance measuring range accordingly can be corrected. If the load torque after exceeding the landing speed has decreased, the controller 7 reduces the voltage via the voltage manipulated variable 13. On A comparable effect is achieved by increasing the frequency manipulated variable 14.
- the signals generated by the rotary encoder 6 are preferably pulse-shaped and are in counted a counter contained in the controller 7, the number of the rotary encoder 6 delivered pulse chain is evaluated so that both the respective speed of the Motor shaft as well as the respective position of a fictitious point on the motor shaft is available and thus the speed of the rotor, d. H. the drum 1, available is.
- the controller 7 Detect unbalance on the rotor.
- the motor controller 7 can be regulated by him Parameters, in particular the motor voltage U or the motor current I either already lowered or increased before the measurement or only during the measurement.
- the motor voltage can also have a plurality of parameters, especially the motor voltage U in connection with the winding temperature of the Motors, 4 are taken into account.
- the position of the unbalance is determined using the Speed curve detected and always tracked by the encoder 6 so that the The position of the unbalance is always available in the motor controller 7. The location of the imbalance to determine the change in the meter reading over a certain Period examined.
- the detection of the position of the unbalance is necessary for drive systems that have a enable active unbalance compensation.
- the unbalance counteracting modulation of the angular velocity of the drum the effects the unbalance reduced.
- a control device can be used be provided, the corresponding parameters such as the speed of the engine, the Motor current, the motor voltage and / or the temperature of the motor windings supplied be so that the control device corresponding to those stored in a memory Characteristic curves that take these parameters into account, the motor voltage accordingly adjusts. It goes without saying that another parameter is selected as the manipulated variable can be.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Brushless Motors (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
Description
- Fig. 1
- ein Prinzip-Schaltbild eines durch einen Umrichter geregelten Asynchronmotors zum Antrieb einer Wäschetrommel und
- Fig. 2
- ein Drehzahl-Drehmoment-Diagramm des Asynchronmotors gemäß Fig. 1.
Claims (18)
- Verfahren zur Detektion von Unwuchten bei einem durch einen bürstenlosen Elektromotor (4) angetriebenen Rotor, insbesondere einer Wäschetrommel in einer Waschmaschine, wobei eine Meßeinrichtung die Drehzahl (n) und die Unwucht des Rotors nach Größe oder nach Größe und Lage bestimmt, dadurch gekennzeichnet, daß nach Überschreiten einer Mindestdrehzahl des Rotors mindestens ein elektrischer Parameter des Elektromotors (4) von seinem für den Betrieb vorgesehenen Maß auf ein für eine Messung vorgesehenes Maß derart verändert wird, daß sich die Steigung (dn/dm) der Drehzahl (n)-Drehmoment (m)-Kennlinie dem Betrag nach erhöht, wobei auch während der Messung die Drehzahl (n) des Rotors oberhalb einer vorgegebenen Mindestdrehzahl (nM) liegt, und daß anschließend die Unwuchten nach Lage und Größe gemessen werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Parameter die Motorspannung (U) ausgewählt wird, die vor oder während der Messung abgesenkt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Parameter die Drehfeldfrequenz des Motors ausgewählt wird, die vor oder während der Messung erhöht wird.
- Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß zur Erhöhung der Genauigkeit des Meßverfahrens zusätzlich als weiterer Parameter die Spannung des Zwischenkreises (11) und/oder die Temperatur von Motorwicklungen des Elektromotors (4) ausgewählt wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Parameter derart verändert wird, daß die Drehzahl (n)-Drehmoment (m)-Kennlinie oberhälb der Mindestdrehzahl (nM) des Elektromotors, insbesondere des Asynchronmotors (4), der Drehzahl (n)-Drehmoment (m)-Kennlinie eines Universalmotors gleicher Leistung entspricht.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Istdrehzahl (nIst) des Elektromotors (4) durch einen Drehgeber (6) als aktuelle Winkelgeschwindigkeit (ω) gemessen wird und einem Regelkreis (7, 13, 14, 12) zur Regelung der Motorspannung (U) zugeführt wird und daß der Regelkreis nach Überschreiten der Mindestdrehzahl (nM) die Motorspannung (U) absenkt oder einen anderen Parameter des Elektromotors (4) derart verändert, daß sein abgebbares Drehmoment sinkt.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Motorstrom, insbesondere in Verbindung mit einer Messung der Istdrehzahl (nIst) des Elektromotors (4), gemessen wird und als Regelgröße dient.
- Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß der Schlupf (s) des Elektromotors (4), der Motorstrom, insbesondere in Abhängigkeit vom magnetischen Fluß, oder das Drehfeld der Spannungen (R, S, T) oder der zugehörigen Ströme des Elektromotors (4), insbesondere anhand eines mathematischen Motormodells, geregelt wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß ein Regler (7) in dem Regelkreis (7, 13, 14, 12) Signalgrößen zur Stellung der Motorspannung und/oder der Drehfeldfrequenz erzeugt, die ihrerseits Stellgrößen für einen Wechselrichter (12) des Elektromotors (4) sind.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß das Stellsignal zur Stellung der Motorspannung und das Stellsignal für die Drehfeldfrequenz zur Erzeugung der Drehzahl einem Multiplikationspunkt (17) zugeführt und von diesem dem Wechselrichter (12) zugeführt werden.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Istdrehzahl (nIst) des Elektromotors (4) durch einen Drehgeber (6) als aktuelle Winkelgeschwindigkeit (ω) gemessen wird und einer Steuereinrichtung zur Steuerung der Motorspannnung (U) zugeführt wird, in der anhand von gespeicherten Kennlinien Stellgrößen für die Motorspannung und die Motordrehzahl zur Steuerung des Wechselrichters (12) erzeugt werden.
- Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß oberhalb der Mindestdrehzahl (nM) die Steuerung oder Regelung der Drehzahl des Elektromotors (4) abgestellt wird und die erreichte Drehzahl des Elektromotors (4) als Meßdrehzahl verwendet wird und daß dann die Steigung (dn/dm) der Drehmoment(m)-Drehzahl(n)-Kennlinie dem Betrag nach erhöht wird.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß als Mindestdrehzahl (nM) die Drehzahl (n) gewählt wird, bei der sich die Wäsche an der inneren Mantelfläche der Wäschetrommel (1) anlegt.
- Vorrichtung zur Durchführung eines Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß der Elektromotor (4) anhand der gemessenen Istdrehzahl (nIst) über einen Motorregler (7) durch eine Spannungsstellgröße und eine Drehzahlstellgröße regelbar oder über eine Steuerschaltung steuerbar ist.
- Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, daß die Spannungsstellgröße und die Drehzahlstellgröße über einen Wechselrichter (12) dem Elektromotor (4) zuführbar sind.
- Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, daß dem Wechselrichter (12) aus einem Zwischenkreis (11) gespeiste Spannungasignale zuführbar sind und daß diese in dem Wechselrichter (12) entsprechend den Werten der Spannungsstellgröße und der Drehzahlstellgröße veränderbar sind.
- Vorrichtung nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, daß dem Zwischenkreis (11) ein Filter (10) zur Ausfilterung hochfrequenter elektromagnetischer Störungen vorgeschaltet ist.
- Vorrichtung nach einem der Ansprüche 14 bis 17, dadurch gekennzeichnet, daß der Motorregler (7) und der Wechselrichter (12) durch ein Netzteil (15) gemeinsam mit Spannung versorgbar sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19918331 | 1999-04-22 | ||
DE19918331A DE19918331A1 (de) | 1999-04-22 | 1999-04-22 | Verfahren und Vorrichtung zur Detektion von Unwuchten bei einem durch einen bürstenlosen Elektromotor angetriebenen Rotor |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1048774A2 true EP1048774A2 (de) | 2000-11-02 |
EP1048774A3 EP1048774A3 (de) | 2001-02-07 |
EP1048774B1 EP1048774B1 (de) | 2004-03-17 |
Family
ID=7905529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00108260A Expired - Lifetime EP1048774B1 (de) | 1999-04-22 | 2000-04-14 | Verfahren und Vorrichtung zur Detektion von Unwuchten bei einem durch einen bürstenlosen Elektromotor angetriebenen Rotor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1048774B1 (de) |
AT (1) | ATE262064T1 (de) |
DE (2) | DE19918331A1 (de) |
ES (1) | ES2218022T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1045062A2 (de) * | 1999-03-26 | 2000-10-18 | Samsung Electronics Co., Ltd. | Waschmaschine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10202352C1 (de) * | 2002-01-23 | 2003-07-10 | Miele & Cie | Waschmaschine mit Antriebssystem |
DE10234053C1 (de) * | 2002-07-26 | 2003-11-20 | Diehl Ako Stiftung Gmbh & Co | Verfahren zum Bestimmen der Unwucht einer Wäschetrommel |
DE10331934B3 (de) * | 2003-07-15 | 2004-10-28 | Danfoss Drives A/S | Verfahren zum Steuern eines Waschmaschinen-Motors und Waschmaschinen-Motor |
DE102004053216B3 (de) * | 2004-06-18 | 2006-02-09 | Diehl Ako Stiftung & Co. Kg | Vorrichtung zur Erfassung einer Schwingbewegung einer Wäschetrommel |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0349798B1 (de) * | 1988-07-07 | 1992-09-02 | Miele & Cie. GmbH & Co. | Verfahren zur Steuerung des Schleudervorgangs einer Trommelwaschmaschine |
EP0565157A1 (de) * | 1992-03-20 | 1993-10-13 | Philips Patentverwaltung GmbH | Verfahren zur Detektion und Kompensation einer Unwucht bei einem durch einen Motor angetriebenen Rotor |
US5543698A (en) * | 1994-09-27 | 1996-08-06 | Allen-Bradley Company, Inc. | Method and apparatus used with AC motor for detecting unbalance |
-
1999
- 1999-04-22 DE DE19918331A patent/DE19918331A1/de not_active Withdrawn
-
2000
- 2000-04-14 ES ES00108260T patent/ES2218022T3/es not_active Expired - Lifetime
- 2000-04-14 AT AT00108260T patent/ATE262064T1/de not_active IP Right Cessation
- 2000-04-14 DE DE50005643T patent/DE50005643D1/de not_active Expired - Lifetime
- 2000-04-14 EP EP00108260A patent/EP1048774B1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0349798B1 (de) * | 1988-07-07 | 1992-09-02 | Miele & Cie. GmbH & Co. | Verfahren zur Steuerung des Schleudervorgangs einer Trommelwaschmaschine |
EP0565157A1 (de) * | 1992-03-20 | 1993-10-13 | Philips Patentverwaltung GmbH | Verfahren zur Detektion und Kompensation einer Unwucht bei einem durch einen Motor angetriebenen Rotor |
US5543698A (en) * | 1994-09-27 | 1996-08-06 | Allen-Bradley Company, Inc. | Method and apparatus used with AC motor for detecting unbalance |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1045062A2 (de) * | 1999-03-26 | 2000-10-18 | Samsung Electronics Co., Ltd. | Waschmaschine |
EP1045062B1 (de) * | 1999-03-26 | 2003-12-17 | Samsung Electronics Co., Ltd. | Waschmaschine |
Also Published As
Publication number | Publication date |
---|---|
EP1048774B1 (de) | 2004-03-17 |
DE19918331A1 (de) | 2000-10-26 |
ATE262064T1 (de) | 2004-04-15 |
ES2218022T3 (es) | 2004-11-16 |
EP1048774A3 (de) | 2001-02-07 |
DE50005643D1 (de) | 2004-04-22 |
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