Title :
Adjustable frequency drives with rotating machine power supply
Author :
Bacheler, A. T. ; Helmick, C. G.
Author_Institution :
Westinghouse Electric Corporation, Buffalo, N. Y.
Abstract :
THE squirrel-cage induction motor so well known to manufacturers and users of machinery of all kinds is usually-considered to be a constant-speed drive because the power available for energizing the motors nearly always has a fixed frequency. This is the frequency of the available power supply from a utility company or local power plant. If an adjustable frequency power supply with the proper characteristics is provided, these motors will operate over a wide speed range with essentially constant torque capability. The rugged, simple construction of the squirrel-cage motor or the similar reluctance synchronous motor can thus be combined with the flexibility of an adjustable speed drive. Fig. 1 shows the basic elements of an adjustable frequency drive consisting of a synchronous generator, its adjustable speed drive, starting equipment, and the drive motors.
Keywords :
Frequency synchronization; Generators; Induction motors; Power supplies; Reluctance motors; Torque;
Journal_Title :
American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the
DOI :
10.1109/TAI.1960.6371676