Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1999-04-01
2000-10-17
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, 310179, 310261, 310165, H02K 300, H02K 328
Patent
active
061336637
ABSTRACT:
A brushless permanent magnet machine that includes a combination of a fractional stator slot/rotor pole and a winding configuration to reduce cogging during operation of the machine. The stator has a series of teeth (preferably eighteen) which are surrounded by a series of coils. The coils are wound around the teeth and connected to a three-phase power supply in a manner that reduces cogging. The rotor has a series of slots (preferably sixteen). In the first embodiment, the coils are wound around every tooth, and the teeth are divided into sections of three, wherein each section of three teeth is connected to one phase of the power supply. In this embodiment, the fractional stator slot/rotor pole ratio is 18/16. In a second embodiment, the coils are wound around every other tooth, which provides for more space for winding the coils. In this embodiment, the fractional stator slot/rotor pole ratio is 9/16.
The permanent magnet machine further includes a design for a rotor lamination which provides sixteen magnet slots and eight slot connecting holes. The slot connecting holes join the magnet slots in pairs, which provide easy access to the magnets inserted in the rotor. The rotor design further provides a series of rotor holes located between the magnet slots which, with the slot connecting holes, provide for insulation of the machine from unwanted magnetic flux.
REFERENCES:
patent: 4242610 (1980-12-01), McCarty et al.
patent: 4568846 (1986-02-01), Kapadia
patent: 4634906 (1987-01-01), Grosjean
patent: 4709179 (1987-11-01), Banon et al.
patent: 4769567 (1988-09-01), Kurauchi et al.
patent: 4845837 (1989-07-01), Lloyd
patent: 5034642 (1991-07-01), Hoemann et al.
patent: 5097166 (1992-03-01), Mikulic
patent: 5510662 (1996-04-01), Tanimoto et al.
patent: 5652470 (1997-07-01), von der Heide et al.
patent: 5723930 (1998-03-01), Ho et al.
patent: 5751089 (1998-05-01), Stridsberry
patent: 5818139 (1998-10-01), Yamagiwa et al.
A. O. Smith Corporation
Mullins Burt
Ramirez Nestor
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