Electricity: motive power systems – Synchronous motor systems – Field winding circuits
Patent
1985-08-12
1987-04-07
Smith, Jr., David
Electricity: motive power systems
Synchronous motor systems
Field winding circuits
318724, 318732, 310180, H02P 736
Patent
active
046564101
ABSTRACT:
When a single-phase electric rotating machine has a stator provided with a main armature winding which is composed of, at least, four winding circuits in such a bridge circuit way as can be formed by connecting one set of series-connected two winding circuits in parallel with the other set of series-connected two winding circuits, in the circuit between two outside electric terminals of the main armature winding, and with an exciting winding of which electric terminals are connected electrically with two intermediate electric terminals for the main armature winding, so that the main armature winding may not only supply or be supplied with a load current through the outside electric terminals but also may be supplied with an exciting current from the exciting winding through the intermediate terminals of the main armature winding, two kinds of currents can flow simultaneously in the armature winding, therefore, two different numbers of poles can be produced simultaneously in the stator, the machine can operate easily and simply as two rotating machines, and a brushless single-phase electric rotating machine having a simple construction can be designed or manufactured, if the machine has substantially two kinds of rotor windings, whether it is used as a synchronous motor or as a synchronous generator.
REFERENCES:
patent: 3098959 (1963-07-01), Rosenberry, Jr.
patent: 3758836 (1973-09-01), Shibata
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