EP1158086B1 - Laundry treatment machine with a direct driving motor - Google Patents
Laundry treatment machine with a direct driving motor Download PDFInfo
- Publication number
- EP1158086B1 EP1158086B1 EP01111084A EP01111084A EP1158086B1 EP 1158086 B1 EP1158086 B1 EP 1158086B1 EP 01111084 A EP01111084 A EP 01111084A EP 01111084 A EP01111084 A EP 01111084A EP 1158086 B1 EP1158086 B1 EP 1158086B1
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- EP
- European Patent Office
- Prior art keywords
- stator
- rotor
- air gap
- disposed
- dryer
- 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.)
- Expired - Lifetime
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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
Definitions
- the invention relates to a laundry treatment device (washing machine, washer-dryer or Dryer) with a floating drum, in which a shaft journal rotatable in two spaced radial bearings is guided, and with a drive motor in the form of a direct drive, the one connected to the shaft journal permanent magnet rotor and one with a stator seat associated stator, wherein rotor and stator concentric with each other are arranged and spaced from each other by an air gap.
- a laundry treatment device washing machine, washer-dryer or Dryer
- a floating drum in which a shaft journal rotatable in two spaced radial bearings is guided, and with a drive motor in the form of a direct drive, the one connected to the shaft journal permanent magnet rotor and one with a stator seat associated stator, wherein rotor and stator concentric with each other are arranged and spaced from each other by an air gap.
- a laundry treatment machine of the type mentioned is for example from the WO 98/36123 A1.
- a sensor is in the form of a washing machine a Hall IC's with respect to the magnets of a trained as a permanent magnet rotor Direct drive rotor known. This sensor is used to measure the rotational speed of the Drum used.
- Patent Abstracts of Japan is an optical monitoring device for the air gap between a rotor and a stator of an electric motor known. at This device is on the rotor in the region of the outer radius of an optical transmitter arranged. On the stator side, a plurality of optical receivers are arranged, which from the Transmit transmitter emitted optical signal, which via a converter in a electrical signal is converted and evaluated. Due to the in radially different Positioned optical receiver can be the position of the received optical Signals are detected and evaluated.
- the invention thus presents the problem in a laundry treatment device described above a due to bearing wear eccentricity between the rotor and stator too recognize and as a consequence a warning of the user and / or an interruption of the To enable further operation.
- the advantages achieved with the invention consist in the possibility of an eccentricity between the rotor and stator to sensate and to this before the destruction of the engine by Exchange of bearings to be able to respond.
- the sensor signal is passed to an electronic control unit and be further processed by this as a warning or shutdown of the device.
- At least one part of the stator associated with the Sensor means arranged approximately in the six o'clock position of the stator. At this point is Reducing the air gap the strongest and can thus be sensed in a simple manner.
- the contact sensor is arranged as on the stator closed conductor loop formed by at least one arranged on the rotor Separator is permanently interrupted. This will be a permanently available Signal generated, which can be further processed in a simple manner.
- the drive motor of a laundry treatment machine is as a direct drive formed, wherein the rotor with the shaft journal of the drum and the stator with the bearing seat of the drum, for example, a bearing cross on the tub a Washing machine, connected.
- the rotor is a permanent magnet rotor and external rotor formed and surrounds the stator poles concentrically to form an air gap.
- the above Construction is for example from WO 98/36123 A1 or from EP 0 953 668 A1 known and therefore not shown or explained in more detail.
- the rotor shown in Figures 1 to 4 consists of a rotor bell (1) in the form of a cup-shaped deep-drawn part or aluminum injection molded part, which on its inside a annular iron yoke (2) and the permanent magnets (3) mounted thereon as Rotor poles contributes.
- a pocket-shaped recesses (4) between the Iron yoke (2) and the bell (1) are one or more separating elements (5) as the first Sensor elements frictionally and / or non-positively introduced.
- the separating element (5, punched and bent part or molding, s. FIG. 5) is pressed against the iron yoke (2) until it stops.
- To stabilize the front area two lateral support ribs (6) are arranged, the supported on the magnet (3).
- a toothing (7) which is the Element (5) in the recess (4) holds.
- the roof-shaped geometry of the upper part (8) protrudes its tip about 0.1-0.15mm opposite the magnets in the air gap (9).
- stator of the direct drive is shown.
- the laminated stator core is in formed substantially annular. It has a series of outward-facing, pronounced stator poles (10) which are connected to stator windings (11, not shown in FIG. 6) are provided.
- the windings (11) are over bobbin (12) made of plastic against insulated the stator lamination.
- the spool bodies (12) outwardly projecting tooth heads (13) of the stator poles (10) are rounded.
- the separating element (5) is opposite on the bobbin (12) another sensor element in the form of a closed loop conductor (14) attached.
- This conductor loop (14) is form-fitting with the help of a dovetail guide (15) attached to the bobbin (12) and also protrudes about 0.1-0.15mm in the Air gap (9) into it.
- the conductor loop (14) When approaching the rotor and stator by reducing the air gap (9), the Conductor loop (14) severed, whereby a signal is delivered to the device control. This signal can be converted into a warning display and / or via the control for Shut down the device.
- the conductor loop (14) is part of a conductor track system (16), which also provides power to the stator and other sensors (thermal switches etc.) and is integrated on a contact carrier (17) (see Figures 7 and 8). This is in turn fixed by means of fastening eyes (18) on the stator.
- an open conductor track instead of the closed conductor loop (14), an open conductor track, a piezoelectric element or a microswitch may be used as the second sensor element. The separator must then modified accordingly.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Control Of Stepping Motors (AREA)
- Treatment Of Fiber Materials (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
Die Erfindung betrifft ein Wäschebehandlungsgerät (Waschmaschine, Waschtrockner oder Trockner) mit einer fliegend gelagerten Trommel, bei der ein Wellenzapfen drehbar in zwei beabstandeten Radiallagern geführt ist, und mit einem Antriebsmotor in Form eines Direktantriebs, der einen mit dem Wellenzapfen verbundenen Permanentmagnet-Rotor und einen mit einem Lagersitz verbundenen Stator beinhaltet, wobei Rotor und Stator konzentrisch zueinander angeordnet und durch einen Luftspalt voneinander beabstandet sind.The invention relates to a laundry treatment device (washing machine, washer-dryer or Dryer) with a floating drum, in which a shaft journal rotatable in two spaced radial bearings is guided, and with a drive motor in the form of a direct drive, the one connected to the shaft journal permanent magnet rotor and one with a stator seat associated stator, wherein rotor and stator concentric with each other are arranged and spaced from each other by an air gap.
Eine Wäschebehandlungsmaschine der eingangs genannten Art ist beispielsweise aus der WO 98/36123 A1 bekannt.A laundry treatment machine of the type mentioned is for example from the WO 98/36123 A1.
Aus der DE 38 19 651 A1 ist bereits eine Waschmaschine bekannt, bei der ohne Verwendung des üblichen Zwischentriebs (Antriebsriemen, Riemenscheibe) die Wäschetrommel direkt angetrieben wird. Bei diesen Antrieben bildet der Rotor das Drehbewegungsübertragungsteil zur Trommel der Waschmaschine.From DE 38 19 651 A1 a washing machine is already known in the use without of the usual intermediate drive (drive belt, pulley) the laundry drum directly is driven. In these drives, the rotor forms the rotary motion transmission part to the drum of the washing machine.
Aus der eingangs genannten WO 98/36123 A1 und aus der DE 43 35 966 A1 ist ein Antriebsmotor für Waschmaschinen bekannt, welcher einen mit der Antriebswelle lösbar zu verbindenden Permanentmagnet-Rotor und einen mit dem Lagersitz lösbar zu verbindenden Stator beinhaltet. Als Permanentmagnete werden bei einem solchen Rotor Hartferrite verwendet, die große magnetische Kräfte entwickeln und sehr spröde sind. Kommt es bei einer solchen Wäschebehandlungsmaschine durch Verschleiß der Lager zu einem zunehmenden Lagerspiel, kann sich die Trommel absenken. Dies hat bei dem vorbeschriebenen Direktantrieb zur Folge, dass sich der Luftspalt an der Unterseite verkleinert. Im Extremfall kann das zur Berührung von Stator und Rotor führen, wobei dann die Permanentmagnete und evtl. auch der Stator zerstört würden.From the aforementioned WO 98/36123 A1 and DE 43 35 966 A1 discloses a drive motor for washing machines, which one to be connected to the drive shaft releasably Permanent magnet rotor and a releasably connected to the bearing seat stator includes. As permanent magnets Hartferrite be used in such a rotor, the develop large magnetic forces and are very brittle. Does it come with such Laundry treatment machine by wear of the bearings to an increasing bearing clearance, The drum can lower. This results in the above-described direct drive, that the air gap at the bottom decreases. In extreme cases, this can be for touching Stator and rotor lead, which then destroys the permanent magnets and possibly also the stator would.
Aus der GB 2 332 212 A ist bei einer Waschmaschine die Anordnung eines Sensors in Form
eines Hall IC's gegenüber den Magneten eines als Permanentmagnetrotor ausgebildeten
Direktantrieb-Rotors bekannt. Dieser Sensor wird zur Messung der Drehgeschwindigkeit der
Trommel verwendet.From
Aus der JP 60 059 942 A Patent Abstracts of Japan ist eine optische Überwachungseinrichtung für den Luftspalt zwischen einem Rotors und einem Stator eines Elektromotors bekannt. Bei dieser Einrichtung ist auf dem Rotor im Bereich des äußeren Radius ein optischer Sender angeordnet. Auf der Statorseite sind mehrere optische Empfänger angeordnet, die das vom Sender abgegebene optische Signal erfassen, was über einen Konverter in ein elektrisches Signal umgewandelt und ausgewertet wird. Aufgrund der in radial unterschiedlicher Position angeordneten optischen Empfänger kann die Position des empfangenen optischen Signals erfasst und ausgewertet werden.From JP 60 059 942 A Patent Abstracts of Japan is an optical monitoring device for the air gap between a rotor and a stator of an electric motor known. at This device is on the rotor in the region of the outer radius of an optical transmitter arranged. On the stator side, a plurality of optical receivers are arranged, which from the Transmit transmitter emitted optical signal, which via a converter in a electrical signal is converted and evaluated. Due to the in radially different Positioned optical receiver can be the position of the received optical Signals are detected and evaluated.
Aus der US 3 373 300 ist ein magnetischer Indikator zur Erkennung von fehlerhaften Lagern einer elektrischen Maschine, wie Generator, bekannt. Hierbei sind im Statorkern Hilfswindungen angeordnet, die durch den Rotor ein Spannungssignal erzeugen. Bei einem Lagerschaden wird kein gleichmäßiges Spannungssignal mehr erzeugt, was zu einer Fehlersensierung genutzt werden kann.From US 3,373,300 is a magnetic indicator for detecting faulty bearings an electric machine, such as a generator known. Here are the stator core Auxiliary windings arranged, which generate a voltage signal by the rotor. At a Bearing damage is generated no uniform voltage signal more, resulting in a Error detection can be used.
Der Erfindung stellt sich somit das Problem, bei einem eingangs beschriebenen Wäschebehandlungsgerät eine durch Lagerverschleiß bedingte Exzentrität zwischen Rotor und Stator zu erkennen und als Folge eine Warnung des Benutzers und/oder eine Unterbrechung des Weiterbetriebes zu ermöglichen. The invention thus presents the problem in a laundry treatment device described above a due to bearing wear eccentricity between the rotor and stator too recognize and as a consequence a warning of the user and / or an interruption of the To enable further operation.
Erfindungsgemäß wird dieses Problem durch ein Wäschebehandlungsgerät mit den Merkmalen der unabhängigen Patentansprüche 1 bis 4 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus dem nachfolgenden Unteranspruch.According to the invention, this problem is solved by a laundry treatment device with the features the independent claims 1 to 4 solved. Advantageous embodiments and Further developments of the invention will become apparent from the following subclaim.
Die mit der Erfindung erreichbaren Vorteile bestehen in der Möglichkeit, eine Exzentrität zwischen Rotor und Stator zu sensieren und auf diese vor der Zerstörung des Motors durch Austausch der Lager reagieren zu können. Im Fehlerfall kann vor einer möglichen Berührung zwischen Rotor und Stator das Sensorsignal an eine Steuerelektronik weitergegeben werden und von dieser als Warnsignal oder Abschaltung des Geräts weiterverarbeitet werden.The advantages achieved with the invention consist in the possibility of an eccentricity between the rotor and stator to sensate and to this before the destruction of the engine by Exchange of bearings to be able to respond. In the event of a fault, prior to a possible contact between rotor and stator, the sensor signal is passed to an electronic control unit and be further processed by this as a warning or shutdown of the device.
In einer vorteilhaften Ausführungsform ist mindestens ein dem Stator zugeordnetes Teil der Sensormittel annähernd in der Sechs-Uhr-Position des Stators angeordnet. An dieser Stelle ist Verringerung des Luftspaltes am stärksten und kann somit in einfacher Weise sensiert werden.In an advantageous embodiment, at least one part of the stator associated with the Sensor means arranged approximately in the six o'clock position of the stator. At this point is Reducing the air gap the strongest and can thus be sensed in a simple manner.
In einer besonders vorteilhaften Ausführungsform ist der Kontaktsensor als am Stator angeordnete geschlossene Leiterschleife ausgebildet, welche durch mindestens ein am Rotor angeordnetes Trennelement dauerhaft unterbrochen wird. Hierdurch wird ein permanent vorhandenes Signal erzeugt, welches in einfacher Weise weiterverarbeitet werden kann.In a particularly advantageous embodiment, the contact sensor is arranged as on the stator closed conductor loop formed by at least one arranged on the rotor Separator is permanently interrupted. This will be a permanently available Signal generated, which can be further processed in a simple manner.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt
- Figur 1
- einen Schnitt durch den Antriebsmotor einer erfindungsgemäß ausgebildeten Wäschebehandlungsmaschine (Rotor, Stator);
Figur 2- ausschnittsweise die Draufsicht auf den Rotor gemäß Figur 1;
Figur 3- den Rotor gemäß Figur 1 in perspektivischer Darstellung
- Figur 4
- einen Ausschnitt aus
Figur 3 im Bereich des Trennelements Figur 5- das Trennelement als Einzelheit
Figur 6- ausschnittsweise die perspektivische Darstellung eines Stators gemäß Figur 1
- Figur 7
- den Kontaktträger aus
Figur 6 in perspektivischer Darstellung von oben - Figur 8
- den Kontaktträger aus
Figur 6 in perspektivischer Darstellung von unten
- FIG. 1
- a section through the drive motor of an inventively designed laundry treatment machine (rotor, stator);
- FIG. 2
- a detail of the plan view of the rotor of Figure 1;
- FIG. 3
- the rotor of Figure 1 in a perspective view
- FIG. 4
- a section of Figure 3 in the region of the separating element
- FIG. 5
- the separator as a detail
- FIG. 6
- a detail of the perspective view of a stator according to Figure 1
- FIG. 7
- the contact carrier of Figure 6 in a perspective view from above
- FIG. 8
- the contact carrier of Figure 6 in perspective view from below
Der Antriebsmotor einer erfindungsgemäßen Wäschebehandlungsmaschine ist als Direktantrieb ausgebildet, wobei der Rotor mit dem Wellenzapfen der Trommel und der Stator mit dem Lagersitz der Trommel, beispielsweise einem Lagerkreuz am Laugenbehälter einer Waschmaschine, verbunden ist. Der Rotor ist als Permanentmagnet-Rotor und als Außenläufer ausgebildet und umgibt die Statorpole konzentrisch unter Bildung eines Luftspalts. (Der vorbeschriebene Aufbau ist beispielsweise aus der WO 98/36123 A1 oder aus der EP 0 953 668 A1 bekannt und deshalb nicht dargestellt oder näher erläutert.) The drive motor of a laundry treatment machine according to the invention is as a direct drive formed, wherein the rotor with the shaft journal of the drum and the stator with the bearing seat of the drum, for example, a bearing cross on the tub a Washing machine, connected. The rotor is a permanent magnet rotor and external rotor formed and surrounds the stator poles concentrically to form an air gap. (The above Construction is for example from WO 98/36123 A1 or from EP 0 953 668 A1 known and therefore not shown or explained in more detail.)
Der in den Figuren 1 bis 4 dargestellte Rotor besteht aus einer Rotorglocke (1) in Form eines topfförmigen Tiefziehteils oder Aluminiumspritzgussteils, welche auf ihrer Innenseite einen ringförmigen Eisenrückschluss (2) und die darauf befestigten Permanentmagnete (3) als Rotorpole trägt. In einer oder mehreren taschenförmigen Aussparungen (4) zwischen dem Eisenrückschluss (2) und der Glocke (1) sind ein oder mehrere Trennelemente (5) als erste Sensorelemente reib- und/oder kraftschlüssig eingebracht. Das Trennelement (5, Stanz-Biegeteil oder Formteil, s. Figur 5) wird bis auf Anschlag gegen den Eisenrückschluss (2) gedrückt. Zur Stabilisierung des vorderen Bereiches sind zwei seitliche Stützrippen (6) angeordnet, die sich am Magneten (3) abstützten. An den Seiten befindet sich eine Verzahnung (7), die das Element (5) in der Aussparung (4) hält. Die dachförmige Geometrie des Oberteiles (8) ragt mit seiner Spitze ca. 0,1-0,15mm gegenüber den Magneten in den Luftspalt (9).The rotor shown in Figures 1 to 4 consists of a rotor bell (1) in the form of a cup-shaped deep-drawn part or aluminum injection molded part, which on its inside a annular iron yoke (2) and the permanent magnets (3) mounted thereon as Rotor poles contributes. In one or more pocket-shaped recesses (4) between the Iron yoke (2) and the bell (1) are one or more separating elements (5) as the first Sensor elements frictionally and / or non-positively introduced. The separating element (5, punched and bent part or molding, s. FIG. 5) is pressed against the iron yoke (2) until it stops. To stabilize the front area two lateral support ribs (6) are arranged, the supported on the magnet (3). On the sides there is a toothing (7), which is the Element (5) in the recess (4) holds. The roof-shaped geometry of the upper part (8) protrudes its tip about 0.1-0.15mm opposite the magnets in the air gap (9).
In den Figuren 1 und 6 ist der Stator des Direktantriebs dargestellt. Das Statorblechpaket ist im wesentlichen ringförmig ausgebildet. Es weist am Umfang eine Reihe von nach außen gerichteten, ausgeprägten Statorpolen (10) auf, die mit Statorwicklungen (11, in Figur 6 nicht dargestellt) versehen sind. Die Wicklungen (11) sind über Spulenkörper (12) aus Kunststoff gegen das Statorblechpaket isoliert. Die die Spulenkörper (12) nach außen überragenden Zahnköpfe (13) der Statorpole (10) sind abgerundet. Dem Trennelement (5) gegenüberliegend ist am Spulenkörper (12) ein weiteres Sensorelement in form einer geschlossenen Leiterschleife (14) angebracht. Diese Leiterschleife (14) ist formschlüssig mit Hilfe einer Schwalbenschwanzführung (15) am Spulenkörper (12) befestigt und ragt ebenfalls ca. 0,1-0,15mm in den Luftspalt (9) hinein.In Figures 1 and 6, the stator of the direct drive is shown. The laminated stator core is in formed substantially annular. It has a series of outward-facing, pronounced stator poles (10) which are connected to stator windings (11, not shown in FIG. 6) are provided. The windings (11) are over bobbin (12) made of plastic against insulated the stator lamination. The spool bodies (12) outwardly projecting tooth heads (13) of the stator poles (10) are rounded. The separating element (5) is opposite on the bobbin (12) another sensor element in the form of a closed loop conductor (14) attached. This conductor loop (14) is form-fitting with the help of a dovetail guide (15) attached to the bobbin (12) and also protrudes about 0.1-0.15mm in the Air gap (9) into it.
Bei einer Annäherung von Rotor und Stator durch Verkleinerung des Luftspaltes (9) wird die Leiterschleife (14) durchtrennt, wodurch ein Signal an die Gerätesteuerung abgegeben wird. Dieses Signal kann in eine Warnanzeige umgewandelt werden und/oder über die Steuerung zur Stillsetzung des Gerätes führen. Die Leiterschleife (14) ist Bestandteil eines Leiterbahnsystems (16), welches außerdem die Stromversorgung des Stators und anderer Sensoren (Thermoschalter usw.) beinhaltet und ist auf einem Kontaktträger (17) integriert (s. Figur 7 und 8). Dieser ist wiederum mittels Befestigungsaugen (18) am Stator fixiert.When approaching the rotor and stator by reducing the air gap (9), the Conductor loop (14) severed, whereby a signal is delivered to the device control. This signal can be converted into a warning display and / or via the control for Shut down the device. The conductor loop (14) is part of a conductor track system (16), which also provides power to the stator and other sensors (thermal switches etc.) and is integrated on a contact carrier (17) (see Figures 7 and 8). This is in turn fixed by means of fastening eyes (18) on the stator.
Anstelle der geschlossenen Leiterschleife (14) kann eine offene Leiterbahn, ein Piezoelement oder ein Mikroschalter als zweites Sensorelement verwendet werden. Das Trennelement muss dann dementsprechend modifiziert werden.Instead of the closed conductor loop (14), an open conductor track, a piezoelectric element or a microswitch may be used as the second sensor element. The separator must then modified accordingly.
Claims (5)
- Laundry treating appliance (washing machine, washer-dryer or dryer), having a detachably mounted drum, wherein a shaft journal is rotatably guided in two spaced-apart radial bearings, and having a driving motor in the form of a direct drive, which includes a permanent magnet rotor (1-4) connected to the shaft journal and a stator (10-13) connected to a bearing seat, rotor (1-4) and stator (10-13) being disposed concentrically with each other and being spaced from each other by an air gap (9), characterised by sensor means (5, 14) having a contact sensor, disposed between rotor (1-4) and stator (10-13), for detecting an eccentricity between stator (10-13) and rotor (1-4) and a change, occasioned thereby, in the width of the air gap (9) or respectively of the radial spacing between stator (10-13) and rotor (1-4), the contact sensor being in the form of a closed armature (14) disposed on the stator (10-13) and protruding into the air gap (9), which armature is permanently interrupted by at least one isolating element (5) disposed on the rotor (1-4) and protruding into the air gap (9).
- Laundry treating appliance (washing machine, washer-dryer or dryer), having a detachably mounted drum, wherein a shaft journal is rotatably guided in two spaced-apart radial bearings, and having a driving motor in the form of a direct drive, which includes a permanent magnet rotor (1-4) connected to the shaft journal and a stator (10-13) connected to a bearing seat, rotor (1-4) and stator (10-13) being disposed concentrically with each other and being spaced from each other by an air gap (9), characterised by sensor means (5, 14) having a contact sensor, disposed between rotor (1-4) and stator (10-13), for detecting an eccentricity between stator (10-13) and rotor (1-4) and a change, occasioned thereby, in the width of the air gap, the contact sensor being in the form of a microswitch, which is disposed on the stator (10-13) and has a switching rod protruding into the air gap (9).
- Laundry treating machine (washing machine, washer-dryer or dryer), having a detachably mounted drum, wherein a shaft journal is rotatably guided in two spaced-apart radial bearings, and having a driving motor in the form of a direct drive, which includes a permanent magnet rotor (1-4) connected to the shaft journal and a stator (10-13) connected to a bearing seat, rotor (1-4) and stator (10-13) being disposed concentrically with each other and being spaced from each other by an air gap (9), characterised by sensor means (5, 14) having a contact sensor, disposed between rotor (1-4) and stator (10-13), for detecting an eccentricity between stator (10-13) and rotor (1-4) and a change, occasioned thereby, in the width of the air gap; the contact sensor being in the form of an open armature disposed on the stator (10-13) and protruding into the air gap (9), which armature is closed by the isolating element (5), which is disposed on the rotor (1-4), protrudes into the air gap (9) and acts as a contact device.
- Laundry treating machine (washing machine, washer-dryer or dryer), having a detachably mounted drum, wherein a shaft journal is rotatably guided in two spaced-apart radial bearings, and having a driving motor in the form of a direct drive, which includes a permanent magnet rotor (1-4) connected to the shaft journal and a stator (10-13) connected to a bearing seat, rotor (1-4) and stator (10-13) being disposed concentrically with each other and being spaced from each other by an air gap (9), characterised by sensor means (5, 14) having a contact sensor, disposed between rotor (1-4) and stator (10-13), for detecting an eccentricity between stator (10-13) and rotor (1-4) and a change, occasioned thereby, in the width of the air gap, the contact sensor being in the form of a piezoelectric element disposed on the stator (10-13) and protruding into the air gap (9), which piezoelectric element emits an electrical signal on being contacted by an actuating element disposed on the rotor.
- Laundry treating appliance according to one of claims 1 to 4, characterised in that at least one part of the sensor means (14), associated with the stator (10-13), is disposed approximately at the six o'clock position of the stator (10-13).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10025016 | 2000-05-23 | ||
| DE10025016A DE10025016B4 (en) | 2000-05-23 | 2000-05-23 | Laundry treatment device with a drive motor in the form of a direct drive |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1158086A2 EP1158086A2 (en) | 2001-11-28 |
| EP1158086A3 EP1158086A3 (en) | 2002-09-18 |
| EP1158086B1 true EP1158086B1 (en) | 2005-09-07 |
Family
ID=7642930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01111084A Expired - Lifetime EP1158086B1 (en) | 2000-05-23 | 2001-05-09 | Laundry treatment machine with a direct driving motor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1158086B1 (en) |
| AT (1) | ATE304074T1 (en) |
| DE (2) | DE10025016B4 (en) |
| ES (1) | ES2245332T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020212198A1 (en) | 2020-09-28 | 2022-03-31 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Contact device of a stator |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI117918B (en) * | 2004-08-19 | 2007-04-13 | Abb Oy | Arrangement in an electric machine |
| DE102007017215B4 (en) | 2007-04-12 | 2017-01-12 | Schaeffler Technologies AG & Co. KG | Rotary direct drive |
| DE102008046187A1 (en) * | 2008-09-06 | 2010-03-11 | Schaeffler Kg | Rotor i.e. external rotor, for washing machine-direct drive, has reinforcing structure comprising segment-like surface sections, which are alternately arranged and comprise axial distance increasing in radial direction |
| DE102014206637A1 (en) * | 2014-04-07 | 2015-10-08 | BSH Hausgeräte GmbH | A method for producing a drum base for a laundry drum of a household appliance, laundry drum and household appliance |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1001152A (en) * | 1910-11-19 | 1911-08-22 | William A Lawrence | Attachment for electric motors. |
| US1492022A (en) * | 1919-06-09 | 1924-04-29 | Fritz W Falck | Protective system for electrical machinery |
| US2794136A (en) * | 1955-11-30 | 1957-05-28 | Gen Electric | Generator warning signal |
| US3373300A (en) * | 1966-02-04 | 1968-03-12 | Francis P. Sullivan | Electric bearing failure indicator |
| CH516885A (en) * | 1970-05-20 | 1971-12-15 | Bbc Brown Boveri & Cie | Electric machine with a device for monitoring the air gap |
| US3678493A (en) * | 1970-09-21 | 1972-07-18 | Borg Warner | Machinery shaft radial position monitor/alarm system |
| DE2114406B1 (en) * | 1971-03-25 | 1972-08-03 | Man | Device for switching off a motor driving a rotating machine part |
| US4211973A (en) * | 1972-10-11 | 1980-07-08 | Kabushiki Kaisha Teikoku Denki Seisakusho | Apparatus for detecting faults to be occurred or initially existing in a running electric rotary machine |
| JPS5931290B2 (en) * | 1978-12-08 | 1984-08-01 | 株式会社帝国電機製作所 | Canned motor operation monitoring device |
| US4379291A (en) * | 1979-09-04 | 1983-04-05 | Texas Eastern Scientific Research, Inc. | Bearing failure indicator for rotating electric machines |
| JPS6059942A (en) * | 1983-09-12 | 1985-04-06 | Toshiba Corp | Air gap monitor of rotary machine |
| US4539499A (en) * | 1984-01-03 | 1985-09-03 | Punch William E | Device for detection of contact between rotor and stator |
| JPH1128298A (en) * | 1997-07-11 | 1999-02-02 | Toshiba Corp | Drum type washing machine |
-
2000
- 2000-05-23 DE DE10025016A patent/DE10025016B4/en not_active Expired - Fee Related
-
2001
- 2001-05-09 DE DE50107333T patent/DE50107333D1/en not_active Expired - Lifetime
- 2001-05-09 EP EP01111084A patent/EP1158086B1/en not_active Expired - Lifetime
- 2001-05-09 AT AT01111084T patent/ATE304074T1/en not_active IP Right Cessation
- 2001-05-09 ES ES01111084T patent/ES2245332T3/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020212198A1 (en) | 2020-09-28 | 2022-03-31 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Contact device of a stator |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50107333D1 (en) | 2005-10-13 |
| ES2245332T3 (en) | 2006-01-01 |
| EP1158086A2 (en) | 2001-11-28 |
| ATE304074T1 (en) | 2005-09-15 |
| EP1158086A3 (en) | 2002-09-18 |
| DE10025016B4 (en) | 2006-09-28 |
| DE10025016A1 (en) | 2001-12-06 |
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