Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1981-12-03
1984-09-18
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
318775, H02P 748
Patent
active
044726708
ABSTRACT:
The present invention discloses AC electrodynamic machines, such as electric motors, which are able to be operated in either a high speed mode or a low speed mode by not energizing one of the windings of the machine or by energizing the one winding so as to induce a magnetic pole of reverse polarity to that conventionally induced, respectively. Methods of operating AC electrodynamic machines are also disclosed.
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A. E. Fitzgerald, D. E. Higginbotham & A. Grabel, "Alternating-Current Motor Speed Control," Basic Electrical Engineering, 5th Ed., pp. 824-826 (McGraw-Hill Book Co., 1981).
J. Rosenblatt and M. H. Friedman, "Speed Control of Induction Motors," Direct and Alternating Current Machinery, pp. 257-259 (New York City Community College 1963).
J. Hindmarsh, Electrical Machines and Their Applications, Manchester College of Science and Technology.
Card-O-Matic Pty. Limited
Smith Jr. David
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