EP0165951A1 - Installation pour le demarrage d'un moteur synchrone - Google Patents

Installation pour le demarrage d'un moteur synchrone

Info

Publication number
EP0165951A1
EP0165951A1 EP19850900059 EP85900059A EP0165951A1 EP 0165951 A1 EP0165951 A1 EP 0165951A1 EP 19850900059 EP19850900059 EP 19850900059 EP 85900059 A EP85900059 A EP 85900059A EP 0165951 A1 EP0165951 A1 EP 0165951A1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
rotation
rotor
arrangement according
coupling part
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.)
Withdrawn
Application number
EP19850900059
Other languages
German (de)
English (en)
Inventor
Berthold Seng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE8400012U external-priority patent/DE8400012U1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0165951A1 publication Critical patent/EP0165951A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/118—Structural association with clutches, brakes, gears, pulleys or mechanical starters with starting devices
    • H02K7/1185—Structural association with clutches, brakes, gears, pulleys or mechanical starters with starting devices with a mechanical one-way direction control, i.e. with means for reversing the direction of rotation of the rotor

Definitions

  • the invention relates to an arrangement for starting a synchronous motor according to the preamble of the main claim, as it is known for example from GB-PS 1 413 782.
  • the rotor of a synchronous motor is rigidly coupled to a drive shaft.
  • a pinion on the rotor shaft engages in a counterpart of a clutch with a backlash so that the full load on the rotor is not immediately effective.
  • difficulties can arise during the start-up of this known motor, because the settling process of the rotor is hindered by the masses coupled with it and by increased frictional moments.
  • a single-phase induction motor is known from DE-PS 1 199 390, the rotor of which is rotatably mounted on the drive shaft and is axially displaceable.
  • the rotor of which is rotatably mounted on the drive shaft and is axially displaceable.
  • the arrangement according to the invention for starting a synchronous motor with the characterizing features of the main claim has the advantage that, apart from small friction losses of the rotor during the starting and starting process, no further forces have to be overcome, which make it difficult to start the motor under load.
  • the masses to be accelerated are reduced to a minimum and no parts have to be moved which have high frictional losses or, for example after a long standstill, first have to be brought out of their rest position with high initial forces.
  • This can be the case, for example, when using the synchronous motor to drive a liquid pump, for example the drain pump of a washing machine, where after a long standstill seals on the drive shaft can stick in the pump housing and prevent the motor from starting.
  • the arrangement according to the invention makes it possible to clear stuck parts of the drive mechanism or the load when the rotor swings up, so that difficulties in starting the motor under load practically no longer occur.
  • the construction of the starter arrangement integrated in the engine has proven to be particularly advantageous because it enables a very compact design to be achieved without additional storage measures and with minimal design effort.
  • the torsional backlash of the rotor in relation to the load-loaded drive shaft should be a certain minimum, e.g. around 90o for a two-pole arrangement depending on the structure of the motor and the size and type of the connected load, so that the rotor does not start to swing and the greatest possible force to detach it is necessary Drive parts are available.
  • This torsional backlash is achieved in a particularly simple constructive manner in that, on the one hand, an axially projecting pin is arranged directly on the rotor, which pin forms a first coupling part which interacts with a second coupling part in the form of a stop on the drive shaft. With such an arrangement, the torsional backlash can be increased to over 300 without the operational safety of the clutch being endangered.
  • FIG. 1 shows a cross section through the arrangement according to the invention
  • FIG. 2 shows a spatial representation of the arrangement comprising the rotor and coupling device
  • FIG. 3 shows a longitudinal section through a first arrangement with a direction of rotation lock
  • FIG. 4 shows a longitudinal section through a second arrangement with a direction of rotation lock
  • Fig. 5 shows a section along the line VV in Fig. 4. Description of the embodiments
  • 10 denotes the stator of a synchronous motor, as can be used for example for the drain pump of a washing machine.
  • the stator 10 has two salient poles 1 1 and 12, which are wound with a single-phase AC winding 13.
  • the stator 1 0 is separated by an air gap 14 from the rotor 1 5, which is permanently magnetically excited by a two-pole arrangement with a north pole 16 and a south pole 17.
  • the rotor 1 5 sits on a hub 18 made of plastic, preferably of polytetrafluoroethylene, which is incorporated in the permanent magnetic material is glued or pressed.
  • the hub 18 forms the bearing for the rotor 1 5.
  • the air gap 14 has an air gap width that is variable over the rotor circumference, symmetrical to the longitudinal axis of the motor. This results in an equal, sometimes narrower or wider air gap at radially opposite points of the pole pieces, so that the permanent magnet rotor 15 assumes a defined rest position.
  • the area of large air gaps is 21, the Area of small air gap width designated 22.
  • the direction of magnetization of the rotor shown in FIG. 1 in its rest position deviates from the field direction of the stator 10, so that when the current flows in the stator winding 13 there is a torque between the rotor and the stator.
  • Figure 2 shows a spatial representation of the rotor 15 to which a first coupling part 24 is molded.
  • This is expediently formed in one piece with the hub 18 and accordingly expediently consists of the same plastic material as the hub. Instead, harder materials can also be used for the coupling part 24, which materials are then connected to the rotor 15 in a form-fitting manner and / or by gluing.
  • the coupling part 24 has the shape of a pin, which projects axially in the region of the rotor shell in the direction of a second coupling part 25, which is arranged on a disk 26. This in turn sits rigidly on a drive shaft 27 of the engine.
  • the second coupling part 25 is formed by a stop in the form of a sector of a circle, which is designed in one piece with the disk 26.
  • the two coupling parts 24 and 25 form a rigid coupling after essentially a load-free passage of a torsional backlash of approximately 300, they can be brought into play in both directions of rotation of the rotor 15, so that the motor can run in both directions of rotation.
  • the direction of rotation of the motor is generally arbitrary, since the pumps are designed accordingly.
  • the drive shaft 27 is offset with a thinner shaft section 28 and a thicker shaft section 29. More magnetic mass and thus stronger magnetic poles can be accommodated on the thinner shaft section 28.
  • the friction losses of the rotor 15 are lower on a thinner shaft than on a thicker shaft.
  • the drive shaft 27 can also be formed with the same thickness throughout, which is simpler in terms of production technology if the lower thickness of the shaft section 28 is not required.
  • FIG. 1 After application of an alternating voltage to the winding 13, a vertical alternating magnetic field is produced in FIG. 1, which is rotated by a predetermined angle in the rest position with respect to the permanent magnetic field of the rotor 15.
  • the permanent magnet rotor 15 orients itself in the rest position so that the flux finds the path of the least magnetic resistance, ie in the NS position shown in FIG.
  • the rotor 15 can carry out torsional vibrations on the section 28 of the drive shaft 27 until the acceleration is sufficient to rotate in synchronism with the network.
  • the rotor 15 must overshoot over the reversal point of the oscillation and must have been accelerated so strongly that it comes into synchronism with the stator field and continues in synchronism with it.
  • a mains frequency of 50 Hz of the current in the stator winding 13 a mains frequency of 50 Hz of the current in the stator winding 13 results.
  • the rotor 15 is not loaded by a connected load, so that there is nothing to prevent the motor from starting.
  • FIGS. 3 to 5 show two further embodiments of the invention, each of which additionally has a direction of rotation blocking device which only releases the rotation of the drive shaft in one direction of rotation of the rotor, while blocking the opposite direction of rotation of the drive shaft in order to force the motor to start in a given direction of rotation.
  • the same reference numerals as in FIGS. 1 and 2 are selected for matching parts in FIGS. 3 to 5, even if the individual parts are designed differently in terms of construction.
  • FIG. 3 shows a motor with stator 10 and rotor 15, in which the drive shaft 27 is mounted on the one hand in a grooved ball bearing 32 and on the other hand in a freewheel bearing 33.
  • the freewheel bearing is designed as a sleeve freewheel and is seated in a bearing shell 34, while the ball bearing 32 is held in a bearing shell 35.
  • the disc 26 is connected to the second coupling part 25 by a split pin 36 fixed and secure against rotation with the drive shaft 27.
  • FIGS. 4 and 5 show a further structural modification of the synchronous motor with a direction of rotation lock corresponding to FIG. 3, the reference symbols used there again having been adopted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

Installation pour le démarrage d'un moteur synchrone, dont le rotor (15) excité par un aimant permanent est placé pour garantir la mise en marche du moteur en charge avec un jeu circonférentiel sur l'arbre de transmission (27). On obtient ainsi un processus de démarrage du rotor (15) pratiquement sans charge, qui attaque, après passage du jeu circonférentiel, par une première pièce de couplage (24) une seconde pièce de couplage (25) reliée à l'arbre de transmission (27) et entraîne l'arbre de transmission. Pour obtenir une direction de rotation prédéterminée du rotor est prévue une installation de blocage de la direction de rotation (33, 38) qui, dans une direction de rotation du rotor, libère la rotation de l'arbre de transmission (27), alors que la direction de rotation opposée de l'arbre de transmission est bloquée.
EP19850900059 1984-01-02 1984-12-10 Installation pour le demarrage d'un moteur synchrone Withdrawn EP0165951A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8400012U 1984-01-02
DE8400012U DE8400012U1 (de) 1984-01-02 1984-01-02 Vorrichtung zum Starten eines Synchronmotors
DE3420371 1984-06-01
DE19843420371 DE3420371C2 (de) 1984-01-02 1984-06-01 Anordnung zum Starten eines Synchronmotors

Publications (1)

Publication Number Publication Date
EP0165951A1 true EP0165951A1 (fr) 1986-01-02

Family

ID=25821723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850900059 Withdrawn EP0165951A1 (fr) 1984-01-02 1984-12-10 Installation pour le demarrage d'un moteur synchrone

Country Status (5)

Country Link
EP (1) EP0165951A1 (fr)
AU (1) AU3785885A (fr)
DE (1) DE3420371C2 (fr)
ES (1) ES283766Y (fr)
WO (1) WO1985003173A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823461A1 (de) * 1988-07-11 1990-01-18 Miele & Cie Pumpvorrichtung fuer fluessigkeiten
DE3904165A1 (de) * 1989-02-11 1990-08-16 Hanning Elektro Werke Selbstanlaufender synchronmotor
ES2019491A6 (es) * 1989-08-04 1991-06-16 Fagor S Coop Ltda Mejoras introducidas en bombas para electrodomesticos accionados por motor sincrono.
DE3941204A1 (de) * 1989-12-14 1991-06-20 Philips Patentverwaltung Anlaufhilfe fuer einen zweipoligen einphasensynchronmotor mit dauermagnetischem rotor
DE4028416A1 (de) * 1990-09-07 1992-03-12 Hanning Elektro Werke Eine anlaufhilfe aufweisender synchronmotor
DE4114566C2 (de) * 1991-05-04 1999-07-08 Randolf Paul Rolff Verfahren zur Inbetriebnahme einer mit einem magnetgelagerten Rotor ausgerüsteten Maschine sowie Schaltung zur Durchführung dieses Verfahrens
DE29810523U1 (de) 1998-06-10 1998-10-08 Magna Reflex Holding GmbH, 97959 Assamstadt Antriebsvorrichtung
DE10207086A1 (de) 2002-02-20 2003-08-28 Barmag Barmer Maschf Texturiermaschine
DE102004056508B3 (de) * 2004-11-24 2006-03-09 Hanning Elektro-Werke Gmbh & Co. Kg Synchronmotor mit Anlaufeinrichtung
EP1943713B1 (fr) * 2005-10-31 2010-12-08 Arçelik Anonim Sirketi Moteur
CN106487187B (zh) * 2015-08-28 2020-11-10 德昌电机(深圳)有限公司 单相永磁电机及使用该电机的吹风机
DE102018221829A1 (de) * 2018-12-14 2020-06-18 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Elektromotor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1302250B (fr) * 1971-02-04
DE1061425B (de) * 1957-10-30 1959-07-16 Licentia Gmbh Getriebanordnung fuer Synchronkleinstmotoren
DE1199390B (de) * 1962-03-17 1965-08-26 Kurt Stoll K G Maschinenfabrik Einphasen-Induktionsmotor
US3452228A (en) * 1962-10-15 1969-06-24 Scott & Fetzer Co Motor construction
US3259771A (en) * 1963-05-13 1966-07-05 Samuel J Rubin Synchronous motors
DE1960581A1 (de) * 1969-12-03 1971-06-09 Vdo Schindling Einrichtung zum Festlegen der Drehrichtung eines mit undefinierter Drehrichtung anlaufenden Motors
DE2145164A1 (de) * 1971-09-09 1973-03-15 Siemens Ag Vorrichtung zum entlasten von motoren waehrend der anlaufphase
FR2182257A7 (fr) * 1972-04-24 1973-12-07 Fontvielle Martine
US4015153A (en) * 1972-05-29 1977-03-29 Sentaro Furuno Small synchronous motor with lash coupling
GB1413782A (en) * 1974-05-17 1975-11-12 Mallory Timers Ltd Synchronous motor including means preventing continued rotation in a wrongway direction of the rotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8503173A1 *

Also Published As

Publication number Publication date
ES283766U (es) 1985-05-01
WO1985003173A1 (fr) 1985-07-18
DE3420371A1 (de) 1985-07-11
DE3420371C2 (de) 1993-10-07
ES283766Y (es) 1985-12-16
AU3785885A (en) 1985-07-30

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19851203

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SENG, BERTHOLD