DE9416334U1 - Contact means for rotating shafts - Google Patents
Contact means for rotating shaftsInfo
- Publication number
- DE9416334U1 DE9416334U1 DE9416334U DE9416334U DE9416334U1 DE 9416334 U1 DE9416334 U1 DE 9416334U1 DE 9416334 U DE9416334 U DE 9416334U DE 9416334 U DE9416334 U DE 9416334U DE 9416334 U1 DE9416334 U1 DE 9416334U1
- Authority
- DE
- Germany
- Prior art keywords
- shaft
- contact means
- generator
- motor
- housing
- 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
Links
- 238000004804 winding Methods 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/40—Structural association with grounding devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Power Steering Mechanism (AREA)
Description
Beschreibung *' *' ·· · ·· ···Description *'*' ·· · ·· ···
Kontaktmittel zwischen Welle (1) und Metallgehäuse (2) eines Elektromotors oder Generators.Contact means between shaft (1) and metal housing (2) of an electric motor or generator.
Die Wellen von Motoren und Generatoren (z.B. Tachogeneratoren) herkömmlicher Bauart werden im Allgemeinen durch Kugeliager am jeweiligen Gehäuse befestigt. Mit der Welie fest verbunden, innerhalb des Gehäuses, befindet sich der rotierende Anker, der bei Motoren von einem Gleich- oder Wechselstrom erregt wird. Bei Tachogeneratoren dient er hingegen der Erzeugung einer Wechselspannung zum Regeln der Drehzahl.The shafts of conventional motors and generators (e.g. tachogenerators) are generally attached to the respective housing by ball bearings. Firmly connected to the shaft, inside the housing, is the rotating armature, which in motors is excited by a direct or alternating current. In tachogenerators, however, it is used to generate an alternating voltage to regulate the speed.
Die Speisung der Ankerspulen (Motor) bzw. der Abgriff der Wechselspannung (Generator) erfolgt über einen Kollektor.The armature coils (motor) are supplied with power or the alternating voltage (generator) is tapped via a collector.
Normalerweise geht man davon aus, daß das elektrische Potential der Welle dem des (geerdeten) Gehäuses entspricht und damit die Welle an der elektrischen Masse liegt.It is normally assumed that the electrical potential of the shaft corresponds to that of the (grounded) housing and that the shaft is therefore connected to the electrical ground.
Der im Schutzanspruch 1 angegebenen Erfindung liegt nun das Problem zugrunde, daß in den meisten praktischen Fällen die Lager mit Übergangswiderständen behaftet sind, die in erster Linie durch die unvermeidbare Ausbildung von mehr oder weniger homogenen Schmiermittelfilmen verursacht werden. Erfahrungsgemäß können so bei stehender Welle Widerstandswerte in der Größenordnung von 10... 100 &OHgr; auftreten; bei rotierender Welle, je nach Drehzahl, werden sogar Werte bis zu einigen Megohm erreicht. Die Welle wird daher mit steigender Drehzahl immer stärker von der elektrischen Masse isoliert und dient damit der von der Ankerwicklung ausgehenden Störenergie als Übertragungsglied (Antenne) zur äußeren Umgebung des Motors oder Generators.The invention specified in claim 1 is based on the problem that in most practical cases the bearings are subject to transition resistance, which is primarily caused by the unavoidable formation of more or less homogeneous lubricant films. Experience has shown that resistance values in the order of 10... 100 Ω can occur when the shaft is stationary; when the shaft is rotating, depending on the speed, values of up to several megohms can even be reached. The shaft is therefore increasingly isolated from the electrical ground as the speed increases and thus serves as a transmission element (antenna) for the interference energy emanating from the armature winding to the external environment of the motor or generator.
Dieses Problem wird mit den im Schutzanspruch 1 aufgeführten Merkmalen gelöst.This problem is solved with the features listed in claim 1.
Mit der Erfindung wird erreicht, daß vom Rotor ausgehende Störenergien, die kapazitiv oder induktiv auf die Welle und ggf. damit mechanisch verbundene Elemente übertragen werden und verursacht sein können durchThe invention ensures that interference energies emanating from the rotor, which are transferred capacitively or inductively to the shaft and possibly mechanically connected elements and can be caused by
- Kommutationsspitzen am Kollektor- Commutation peaks at the collector
- die Grundfrequenz sowie Harmonische der Motorbetriebsspannung, insbesondere bei Speisung durch getaktete Regler mit Impulsbreitenmodulation- the fundamental frequency and harmonics of the motor operating voltage, especially when supplied by clocked controllers with pulse width modulation
- die Grundfrequenz sowie Harmonische der Ausgangsspannung im Generatorbetrieb zur elektrischen Masse hin kurzgeschlossen und damit unschädlich gemacht werden.- the fundamental frequency and harmonics of the output voltage in generator mode are short-circuited to the electrical ground and thus rendered harmless.
Ein Ausführungsbeispiel der Erfindung wird anhand der Figur 1 erläutert.An embodiment of the invention is explained with reference to Figure 1.
Die Welle (1) ist mit dem Kugellagern (4) am Gehäuse (2) befestigt. Das Gehäuse wird vom Befestigungswinke! (5) getragen und ist bei (6) am allgemeinen Erdungspunkt angeschlossen. Die von der Ankerwicklung (7) auf den Rotor (8), der direkten galvanischen Kontakt mit der Welle (1) hat, übertragene Störenergie wird von der Welle (1) über den Schleifring (9) und die Verbindung (3) über das Masseband (10) zum Befestigungswinkel (5) und damit zum Gehäuse (2) sowie dem Erdungspunkt (6) abgeleitet.The shaft (1) is attached to the housing (2) with the ball bearings (4). The housing is supported by the mounting bracket (5) and is connected to the general earthing point at (6). The interference energy transferred from the armature winding (7) to the rotor (8), which has direct galvanic contact with the shaft (1), is diverted from the shaft (1) via the slip ring (9) and the connection (3) via the earthing strap (10) to the mounting bracket (5) and thus to the housing (2) and the earthing point (6).
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9416334U DE9416334U1 (en) | 1994-10-11 | 1994-10-11 | Contact means for rotating shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9416334U DE9416334U1 (en) | 1994-10-11 | 1994-10-11 | Contact means for rotating shafts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9416334U1 true DE9416334U1 (en) | 1995-05-18 |
Family
ID=6914728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9416334U Expired - Lifetime DE9416334U1 (en) | 1994-10-11 | 1994-10-11 | Contact means for rotating shafts |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE9416334U1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2576271B1 (en) | 2010-05-27 | 2020-12-02 | Nissan Motor Co., Ltd | Power transmission device for electric vehicle |
| DE102020206743A1 (en) | 2020-05-29 | 2021-12-02 | Zf Friedrichshafen Ag | Drive unit for an electrically powered vehicle |
| DE102008039577C5 (en) | 2007-08-29 | 2024-04-04 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Apparatus and method for reducing high frequency signal stray noise in an electrically powered vehicle |
-
1994
- 1994-10-11 DE DE9416334U patent/DE9416334U1/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008039577C5 (en) | 2007-08-29 | 2024-04-04 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Apparatus and method for reducing high frequency signal stray noise in an electrically powered vehicle |
| EP2576271B1 (en) | 2010-05-27 | 2020-12-02 | Nissan Motor Co., Ltd | Power transmission device for electric vehicle |
| DE102020206743A1 (en) | 2020-05-29 | 2021-12-02 | Zf Friedrichshafen Ag | Drive unit for an electrically powered vehicle |
| WO2021239807A1 (en) | 2020-05-29 | 2021-12-02 | Zf Friedrichshafen Ag | Drive unit for an electrically driven vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2504918B1 (en) | Preventing load rejection overvoltages in synchronous rectifiers | |
| DE102006007437B4 (en) | Electric machine with a device for preventing harmful bearing currents and corresponding method | |
| DE1613406A1 (en) | Motor-driven tool | |
| CH663697A5 (en) | Arrangement for dissipating shaft voltages | |
| DE69614499T2 (en) | Electric power supply system for a motor vehicle | |
| WO2016206887A1 (en) | Improved electromagnetic compatibility of a drive arrangement for an electrically driven vehicle | |
| DE19742622A1 (en) | Method and device for monitoring shaft currents and shaft voltages in a generator shaft | |
| DE102014018432A1 (en) | Motor vehicle electric motor with EMC measure | |
| DE3240058A1 (en) | ELECTRIC GENERATOR FOR VEHICLES | |
| DE102014225228A1 (en) | Electric machine with a potential equalization device | |
| DE9416334U1 (en) | Contact means for rotating shafts | |
| DE102010063734B4 (en) | Electric machine | |
| DE3529398C2 (en) | Electric machine | |
| DE102008019644A1 (en) | Electric drive machine | |
| DE102015100847A1 (en) | Electric machine with reduced electromagnetic interference distribution | |
| DE102014225236A1 (en) | Electric machine with a potential equalization device | |
| DE3815452A1 (en) | PULSER | |
| DE3012634A1 (en) | BRUSH HOLDER FOR GENERATORS OF MOTOR VEHICLES | |
| DE102020111926A1 (en) | Electric motor and electric drive for a vehicle with the electric motor with integrated power dissipation and energy harvesting | |
| DE904784C (en) | Arrangement for the suppression of electrical machines and devices | |
| WO2018091242A1 (en) | Electric machine | |
| DE582781C (en) | Converter from direct current to alternating current for toy purposes by mechanical means by means of a rotatable cylindrical insulating body | |
| AT219127B (en) | Transportable generator set | |
| DE102004004745A1 (en) | Brush holder for an electrical machine such as a motor vehicle generator has four holders for carbon brushes switched as pairs in parallel | |
| DE19647757C1 (en) | Interception-protected electromechanical power supply e.g. for data encoding rooms |