AT88906B - Pole-changing three-phase machine. - Google Patents
Pole-changing three-phase machine.Info
- Publication number
- AT88906B AT88906B AT88906DA AT88906B AT 88906 B AT88906 B AT 88906B AT 88906D A AT88906D A AT 88906DA AT 88906 B AT88906 B AT 88906B
- Authority
- AT
- Austria
- Prior art keywords
- pole
- changing
- winding
- phase
- poles
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F45/00—Wire-working in the manufacture of other particular articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/28—Apparatus or processes specially adapted for manufacturing resistors adapted for applying terminals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/12—Asynchronous induction motors for multi-phase current
- H02K17/14—Asynchronous induction motors for multi-phase current having windings arranged for permitting pole-changing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Induction Machinery (AREA)
- Electric Clocks (AREA)
- Control Of Ac Motors In General (AREA)
Description
<Desc/Clms Page number 1>
EMI1.1
EMI1.2
<Desc/Clms Page number 2>
EMI2.1
der grossen Polzahl, Es ergibt sich daher unter der Annahme gleicher Luftinduktionen das Verhältnis der Spannungen bei beiden Drehzahlen :
EMI2.2
Es ist somit zulässig, die Wicklungen ohne weiteres an die gleiche Netzspannung zu legen. Die Motoren haben dann für beide Drehzahlen nahezu die gleiche Feldstärke und
EMI2.3
wäre, zur Spannungseinstellung besondere Transformatoren zu verwenden.
Die geringe Abweichung in den Feldstärken-sie ist bei der grossen Drehzahl etwas grösser als bei der kleinen-wirkt mit Rücksicht auf die zusätzliche Streuung günstig, die sich infolge der bei der kleinen Polzahl auftretenden Oberfelder ergibt.
Bei dem beschriebenen Ausführungsbeispiel liegen die Spulengruppen bei Sternschaltung und Dreieckschaltung gemäss Fig. 2 und 3 in Reihe. Man kann sie auch nebenschalten, wie Fig. 4 und 5 zeigen.
<Desc / Clms Page number 1>
EMI1.1
EMI1.2
<Desc / Clms Page number 2>
EMI2.1
the large number of poles, assuming the same air induction, the relationship between the voltages at both speeds results:
EMI2.2
It is therefore permissible to easily connect the windings to the same mains voltage. The motors then have almost the same field strength and for both speeds
EMI2.3
would be to use special transformers to adjust the voltage.
The slight deviation in the field strengths - it is somewhat greater at the high speed than at the small one - has a favorable effect with regard to the additional scatter that results from the upper fields occurring with the small number of poles.
In the embodiment described, the coil groups are connected in series with a star connection and delta connection according to FIGS. 2 and 3. They can also be switched as an auxiliary switch, as shown in FIGS. 4 and 5.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES48196D DE400304C (en) | 1918-04-24 | 1918-04-24 | In the ratio 1: 2 pole-changing three-phase machine with two-layer winding |
Publications (1)
Publication Number | Publication Date |
---|---|
AT88906B true AT88906B (en) | 1922-07-10 |
Family
ID=7486745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT88906D AT88906B (en) | 1918-04-24 | 1919-04-19 | Pole-changing three-phase machine. |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT88906B (en) |
CH (1) | CH89864A (en) |
DE (1) | DE400304C (en) |
FR (1) | FR510890A (en) |
GB (1) | GB140452A (en) |
-
1918
- 1918-04-24 DE DES48196D patent/DE400304C/en not_active Expired
-
1919
- 1919-04-19 AT AT88906D patent/AT88906B/en active
-
1920
- 1920-01-21 CH CH89864D patent/CH89864A/en unknown
- 1920-03-01 FR FR510890D patent/FR510890A/en not_active Expired
- 1920-03-18 GB GB8084/20A patent/GB140452A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB140452A (en) | 1921-06-20 |
FR510890A (en) | 1920-12-13 |
DE400304C (en) | 1924-08-06 |
CH89864A (en) | 1921-07-01 |
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