CH213321A - Magnetic flywheel. - Google Patents
Magnetic flywheel.Info
- Publication number
- CH213321A CH213321A CH213321DA CH213321A CH 213321 A CH213321 A CH 213321A CH 213321D A CH213321D A CH 213321DA CH 213321 A CH213321 A CH 213321A
- Authority
- CH
- Switzerland
- Prior art keywords
- flywheel
- magnetic
- magnetic flywheel
- igniter
- iron
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2791—Surface mounted magnets; Inset magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Description
Magnetschwungrad. Versuche haben ergeben, dass zum Bei spiel bei Schwungradmagnetzündern und Schwungradlichtmagnetzündern, bei denen permanente Magnete und Weicheisenpol schuhe in ein Schwungrad aus nicht magne- tisierbarem Werkstoff eingebaut sind, Span nungsschwankungen auftreten, welche von den in jedem einzelnen Fall herrschenden Einbauverhältnissen abhängig sind. Zurück zuführen sind diese Spannungsschwankun gen darauf, dass durch den von den Magne ten ausgehenden Streufluss in den gegebenen falls in der Nähe der Magnetschwungräder liegenden Motorteilen Wirbelströme erzeugt werden, welche auf die elektrischen Verhält nisse in den Maschinen zurückwirken.
Derartige Ungleichförmigkeiten können nicht auftreten bei solchen Schwungrädern aus nicht magnetisierbaren Stoffen, welche gemäss der Erfindung mit einem Ring aus Eisen umgeben sind. Die Wirkung eines .der artigen Eisenringes beruht darauf, dass durch ihn der magnetische Streufluss der Magnete gegenüber ihrer Umgebung abgeschirmt wird.
In den Fig. 1 und 2 der beiliegenden Zeichnung ist eine beispielsweise Ausfüh rungsform des Magnetschwungrades gemäss der Erfindung in der Draufsicht von vorne und von der Seite teilweise im Schnitt dar gestellt. In den Abbildungen ist a ein Schwungrad aus Zinkspritzguss, welches um permanente Magnete b und Weicheisenpol schuhe c herumgegossen ist. Die Nabe des Schwungrades a ist mit a' bezeichnet. Am äussersten Umfang des Schwungrades ist ein Eisenring d aufgepresst, welcher zur magne tischen Abschirmung des Magnetsystems dient und dadurch das Schwungrad einbau unempfindlich macht.
Der Eisenring d er höht auch gleichzeitig die mechanische Festigkeit und die Schwungmasse des Rades, was insbesondere bei Leichtmetallschwung rädern von Vorteil ist.
Magnetic flywheel. Tests have shown that, for example, in flywheel magneto and flywheel magneto where permanent magnets and soft iron pole shoes are built into a flywheel made of non-magnetizable material, voltage fluctuations occur which depend on the installation conditions in each individual case. These voltage fluctuations can be attributed to the fact that the leakage flux emanating from the magnets generates eddy currents in the motor parts that may be in the vicinity of the magnetic flywheels, which have an effect on the electrical conditions in the machines.
Such irregularities cannot occur with such flywheels made of non-magnetizable materials which, according to the invention, are surrounded by a ring made of iron. The effect of a .der-like iron ring is based on the fact that it shields the magnetic leakage flux of the magnets from their surroundings.
In Figs. 1 and 2 of the accompanying drawings, an example Ausfüh is approximately the form of the magnetic flywheel according to the invention in a plan view from the front and from the side partially in section is provided. In the figures, a is a die-cast zinc flywheel that is cast around permanent magnets b and soft iron pole shoes c. The hub of the flywheel a is denoted by a '. An iron ring d is pressed onto the outermost circumference of the flywheel, which serves for the magnetic shielding of the magnet system and thus makes the flywheel insensitive to installation.
The iron ring also increases the mechanical strength and the flywheel mass of the wheel at the same time, which is particularly advantageous for light metal flywheels.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE213321X | 1939-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH213321A true CH213321A (en) | 1941-01-31 |
Family
ID=5812620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH213321D CH213321A (en) | 1939-05-11 | 1940-04-12 | Magnetic flywheel. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH213321A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019182503A1 (en) | 2018-03-23 | 2019-09-26 | BAE Systems Hägglunds Aktiebolag | Arrangement for reducing eddy current losses of an outer rotor electric machine |
-
1940
- 1940-04-12 CH CH213321D patent/CH213321A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019182503A1 (en) | 2018-03-23 | 2019-09-26 | BAE Systems Hägglunds Aktiebolag | Arrangement for reducing eddy current losses of an outer rotor electric machine |
| EP3769407A4 (en) * | 2018-03-23 | 2021-12-15 | Bae Systems Hägglunds Aktiebolag | Arrangement for reducing eddy current losses of an outer rotor electric machine |
| US11575287B2 (en) | 2018-03-23 | 2023-02-07 | BAE Systems Hägglunds Aktiebolag | Arrangement for reducing eddy current losses of an outer rotor electric machine |
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