Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1979-03-13
1981-10-20
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310198, 318777, H02K 300
Patent
active
042963443
ABSTRACT:
The efficiency of a multi-speed motor is optimized for the speed at which the motor is to be most frequently operated by first predetermining the expected most frequently used motor speed and then forming a start winding having a number of starting poles corresponding to the expected most frequently used motor speed from conductor material having a greater cross-sectional area than that of the conductor material employed in such a motor previously. The start winding is placed in selected slots of a stator core already containing a main winding so as to be in quadrature with the effect of the main winding when the main winding is connected in the most frequently used speed configuration. Another start winding having a number of starting poles corresponding to an expected less frequently used motor speed is formed and placed in the stator core radially inwardly of the main winding and the previous start winding with the number of coil turns in the innermost start winding, which are placed in core slots already containing other coil turns, being generally proportioned to the remaining available slot space. There is thereby created an improved stator for a multi-speed motor wherein the more frequently used start or auxiliary winding is formed as a number of winding pole groups for establishing magnetic poles located midway between adjacent main winding poles established during the more frequently used speed configuration. Further, the less frequently employed start winding may be distributed in given stator core slots in proportion to the cross-sectional area of the slot less the area of the slot occupied by the main and more frequently used auxiliary winding.
REFERENCES:
patent: 1525022 (1925-03-01), Blathy
patent: 2671879 (1954-03-01), Schwarz
patent: 2774024 (1956-11-01), Brammerlo
patent: 2947894 (1960-08-01), Strang
patent: 3114093 (1963-12-01), Fricke
patent: 3153183 (1964-10-01), Brammerlo
patent: 3153184 (1964-10-01), Stout
patent: 3204167 (1965-08-01), Zigler
patent: 3260910 (1966-07-01), Spindler
patent: 3295034 (1966-12-01), Herzog
patent: 3535572 (1970-10-01), De Rugeris
patent: 4066937 (1978-01-01), Pfarrer
patent: 4100444 (1978-07-01), Boyd
patent: 4107583 (1978-08-01), Houtman
General Electric Company
Krisher, Jr. Ralph E.
Skudy R.
LandOfFree
Multi-speed motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-speed motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-speed motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1493292