DE2538480A1 - Vibration damper for step motor - has brass inertia disc with surface layer of iron - Google Patents

Vibration damper for step motor - has brass inertia disc with surface layer of iron

Info

Publication number
DE2538480A1
DE2538480A1 DE19752538480 DE2538480A DE2538480A1 DE 2538480 A1 DE2538480 A1 DE 2538480A1 DE 19752538480 DE19752538480 DE 19752538480 DE 2538480 A DE2538480 A DE 2538480A DE 2538480 A1 DE2538480 A1 DE 2538480A1
Authority
DE
Germany
Prior art keywords
rotor
iron
brass
inertial mass
vibration damper
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
Application number
DE19752538480
Other languages
German (de)
Other versions
DE2538480C2 (en
Inventor
Roland Sudler
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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
Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Priority to DE19752538480 priority Critical patent/DE2538480C2/en
Priority to AU14494/76A priority patent/AU504982B2/en
Priority to US05/695,460 priority patent/US4049985A/en
Priority to IT24298/76A priority patent/IT1063503B/en
Priority to JP51070313A priority patent/JPS6038948B2/en
Priority to BR7603873A priority patent/BR7603873A/en
Priority to FR7618369A priority patent/FR2315187A1/en
Priority to GB25207/76A priority patent/GB1533312A/en
Publication of DE2538480A1 publication Critical patent/DE2538480A1/en
Application granted granted Critical
Publication of DE2538480C2 publication Critical patent/DE2538480C2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/16—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating an electro-dynamic continuously rotating motor

Abstract

The vibration damper for a step motor consists of a pot-shaped rotating permanent magnet enclosing an inertia mass of magnetisable material. When this feature is not necessary. The shaft (1) has a rotor (3) which is a permanent magnet. An inertia mass (4) in the form of a disc (5) made of brass or other suitable para or dia-magnetic material is free to rotate on the plastic bush (7). The face of the disc is covered with a layer (6) of iron or other ferromagnetic material.

Description

Dämpfungseinrichtung für einen Schrittmotor Die Erfindung bezieht sich auf eine Einrichtung zur Dämpfung der Eigenschwingungen des dauermagnetischen Rotors eines Schrittmotors mittels einer auf der Motorwelle angeordneten Trägehitsmasse, die magnetisch mit dem Rotor gekuppelt ist, nach Patent.. ....... Damping device for a stepping motor The invention relates on a device for damping the natural oscillations of the permanent magnet Rotor of a stepper motor by means of an inertial mass arranged on the motor shaft, which is magnetically coupled to the rotor, according to patent ... .......

Patentanmeldung P 25 27 o46.6).Patent application P 25 27 046.6).

Wie im Hauptpatent ausgeführt ist, läßt sich durch die magnetische Kupplung von Rotor und Trägheitsmasse eine äußerst wirksame Dämpfungseinrichtung erzielen, die insbesondere bei einem topfförmigen Rotor und einer im Rotorinneren angeordneten magnetisierbaren Trägheitsmasse ein sehr geringes Bauvolumen besitzt. Die Anordnung der Trdgheitsmasse im Rotorinneren hat darüber hinaus den Vorteil, daß der dauermagnetische Rotor nach seinem Einbau von außen auf die gewünschte Magnetisierungsstdr:ke gebracht werden kann, was für viele Anwendungsfälle eine unabdingbare Forderung ist.As stated in the main patent, the magnetic Coupling of rotor and inertial mass is an extremely effective damping device achieve, in particular with a cup-shaped rotor and one inside the rotor arranged magnetizable inertial mass has a very small volume. The arrangement of the inertia mass inside the rotor also has the advantage of that the permanent magnet rotor after its installation from the outside to the desired magnetization strength: ke can be brought, which is an indispensable requirement for many applications is.

Es hat sich nun gezeigt, daß gerade diese Forderung dann nicht mehr erfüllbar ist, wenn,auswelchen Gründen auch immer, die Trägheitsmasse nicht mehr im Rotorinnern angeordnet werden kann. Dies ist im wesentlichen darauf zurückzuführen, daß die beispielsweise aus einer Scheibe magnetisierbaren Materials bestehende Trägheitsmasse den Verlauf des Magnetisierungsfeldes stark und in ungünstiger Weise beeinflußt.It has now been shown that precisely this requirement will no longer apply can be fulfilled if, for whatever reasons, the inertial mass is no longer can be arranged inside the rotor. This is essentially due to that the inertial mass, for example consisting of a disk of magnetizable material strongly and unfavorably influences the course of the magnetization field.

In Weiterbildung der Erfindung nach dem Hauptpatent kann dieser Nachteil erfindungsgemäß dadurchumgangen werden, daß als Trägheitsmasse eine Scheibe aus einempara- oder diamagnetischen Werkstoff vorgesehen ist, die auf ihrer der Rotorstirnfläche benachbarten Stirnseite mit einem dünnen Überzug aus einem ferromagnetischen Werkstoff versehen ist.In a further development of the invention according to the main patent, this disadvantage be circumvented according to the invention in that a disk is used as the inertial mass a para- or diamagnetic material is provided on their end face adjacent to the rotor end face with a thin coating a ferromagnetic material is provided.

Durch eine derartige Ausbildung der Trägheitsmasse wird erreicht, daß bereits bei kleinen Magnetisierungsfeldstärken die ferromagnetische Schicht gesättigt ist und infolgedessen eine ins. Gewicht fallende Beeinflussung des Magnetisierungsfeldes sicher unterbunden ist.Such a design of the inertial mass achieves that even with small magnetization field strengths the ferromagnetic layer is saturated and, as a result, an ins. Weight-decreasing influence on the magnetization field is safely prevented.

In einer bevorzugten Ausführungsform der Erfindung besteht die Trägheitsmasse aus einer Messingscheibe, die auf ihrer einen Seite mit einem dünnen Überzug aus Eisen versehen ist. Die Dicke der Überzugsschicht wird im allgemeinen weniger als ein Zehntel Millimeter und mehr als ein tausendstel Millimeter betragen.In a preferred embodiment of the invention, there is an inertial mass made of a brass disc, which is made of a thin coating on one side Iron is provided. The thickness of the coating layer is generally less than a tenth of a millimeter and more than a thousandth of a millimeter.

Die Erfindung sei anhand der Zeichnung, die in zum Teil schematischer Darstellung ein Ausführungsbeispiel enthält, näher erläutert.The invention is based on the drawing, which is in part schematic Representation contains an embodiment, explained in more detail.

Der im Längsschnitt dargestellte bewegliche Teil des Schrittmotors umfasst eine Welle 1, auf der der Rotor 2 befestigt ist, der als mehrpolig radial magnetisierter Dauermagnet 3 realisiert ist.The moving part of the stepper motor shown in longitudinal section comprises a shaft 1 on which the rotor 2 is mounted, which is called multi-pole radial magnetized permanent magnet 3 is realized.

Auf der Welle 1 befindet sich des weiteren die Trägheitsmasse 4, die fliegend auf der Welle 1 gelagert ist. Die Trägheitsmasse 4 ist in Form einer Scheibe 5 aus Messing ausgebildet und ist auf ihrer dem Rotor 2 benachbarten Stirnfläche mit einem dünnen Überzug 6 aus Eisen versehen.On the shaft 1 there is also the inertial mass 4, the is overhung on the shaft 1. The inertial mass 4 is in the form of a disk 5 is made of brass and is on its end face adjacent to the rotor 2 provided with a thin coating 6 made of iron.

Zur schmierungsfreien Lagerung. ist die Scheibe 5 mit einer Kunststoffbuchse 7 versehen, deren aus der Stirnfläche gegen den Rotor 2 ragender Endteil gleichzeitig als Abstandshalter dient.For lubrication-free storage. is the disc 5 with a plastic bushing 7 provided, whose from the end face against the rotor 2 protruding End part also serves as a spacer.

Claims (2)

PatentansprücheClaims 1. Einrichtung zur Dämpfung der Eigenschwingungen des dauermagnetischen Rotors eines Schrittmotors mittels einer auf der Motorwelle angeordneten Trägheitsmasse, die magnetisch mit dem Rotor gekuppelt ist, nach Patent (Patentanmeldung P 25 27 o46.6), dadurch gekennzeichnet, daß als Trägheitsmasse (4)eine Scheibe (5) aus einem para- oder diamagnetischen Werkstoff vorgesehen ist, die auf ihrer der Rotorstirnfläche benachbarten Strinseite mit einem dünnen Überzug (6) aus einem ferromagnetischen Werkstoff versehen ist. 1. Device for damping the natural vibrations of the permanent magnet Rotor of a stepper motor by means of an inertial mass arranged on the motor shaft, which is magnetically coupled to the rotor, according to patent (patent application P 25 27 o46.6), characterized in that the inertial mass (4) is a disk (5) from a Para- or diamagnetic material is provided on its the rotor face adjacent strand side with a thin coating (6) made of a ferromagnetic Material is provided. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Trägheitsmasse (4) eine Messingscheibe (5) vorgesehen ist und der dünne Überzug aus Eisen besteht.2. Device according to claim 1, characterized in that the inertial mass (4) a brass washer (5) is provided and the thin coating is made of iron.
DE19752538480 1975-06-18 1975-08-29 Damping device for a stepper motor Expired DE2538480C2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE19752538480 DE2538480C2 (en) 1975-08-29 1975-08-29 Damping device for a stepper motor
AU14494/76A AU504982B2 (en) 1975-06-18 1976-06-01 Damping device for a stepping motor
US05/695,460 US4049985A (en) 1975-06-18 1976-06-14 Damping device for a stepper motor
JP51070313A JPS6038948B2 (en) 1975-06-18 1976-06-15 A device that dampens the natural vibration of the permanent magnet rotor of a step motor.
IT24298/76A IT1063503B (en) 1975-06-18 1976-06-15 DEVICE FOR DAMPING THE OWN OSCILLATIONS OF THE ROTOR OF AN ELECTRIC STEP MOTOR
BR7603873A BR7603873A (en) 1975-06-18 1976-06-16 SHOCK ABSORBER ASSEMBLY FOR A GRADUAL ENGINE
FR7618369A FR2315187A1 (en) 1975-06-18 1976-06-17 DEVICE FOR REDUCING THE NOISE OF A STEP-BY-STEP MOTOR
GB25207/76A GB1533312A (en) 1975-06-18 1976-06-17 Stepping motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752538480 DE2538480C2 (en) 1975-08-29 1975-08-29 Damping device for a stepper motor

Publications (2)

Publication Number Publication Date
DE2538480A1 true DE2538480A1 (en) 1977-03-03
DE2538480C2 DE2538480C2 (en) 1985-03-07

Family

ID=5955133

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752538480 Expired DE2538480C2 (en) 1975-06-18 1975-08-29 Damping device for a stepper motor

Country Status (1)

Country Link
DE (1) DE2538480C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302986A (en) * 1976-03-18 1981-12-01 Wallace Murray Corporation Plastic hub torsional vibration damper

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142993A1 (en) * 1991-12-24 1993-07-01 Teves Gmbh Alfred Electric motor driving radial force loads, e.g. pumps and compressors - has disk-shaped vibration absorber inserted on rotor shaft at back side of motor case

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2217437A1 (en) * 1972-04-12 1973-10-25 Motoren Turbinen Union ROTARY VIBRATION DAMPER
DE1803328B2 (en) * 1968-10-16 1975-01-09 Vdo Adolf Schindling Ag, 6000 Frankfurt Stepping motor has oscillations damped by progressive spring - links and spring flying outer rotor to inner inertial mass on shaft

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1803328B2 (en) * 1968-10-16 1975-01-09 Vdo Adolf Schindling Ag, 6000 Frankfurt Stepping motor has oscillations damped by progressive spring - links and spring flying outer rotor to inner inertial mass on shaft
DE2217437A1 (en) * 1972-04-12 1973-10-25 Motoren Turbinen Union ROTARY VIBRATION DAMPER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302986A (en) * 1976-03-18 1981-12-01 Wallace Murray Corporation Plastic hub torsional vibration damper

Also Published As

Publication number Publication date
DE2538480C2 (en) 1985-03-07

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