Comparative study of motor characteristics, with specific applications, to aid machine-tool designer in his choice of drive; less gearing required with d.c. motors; superior speed regulation of multi-speed motor makes it more desirable than adjustable-speed motor, particularly on higher speeds.
Adjustable-speed d.c. Vs. multi-speed a.c. motors for machine tools
Am. Mach
American Machinist ; 71 , n 15
1929
5 pages
7 Figs.
Article (Journal)
English
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Modernized machine tool drives by multi-speed gear-motors
Engineering Index Backfile | 1937
|The Soft Starters - Adjustable-speed systems for multiple megawatt rated motors.
Online Contents | 2008
|Engineering Index Backfile | 1931
|