Polyphase electric motor
AssigneeRevolution Motor Technology, LLC
InventorSergei Kolomeitsev
Life of this patent
Estimating the term…
Abstract
A polyphase electric motor has a rotor, a stator with a plurality of slots, a plurality of main windings and a plurality of auxiliary windings installed in slots of the stator, and a main winding and an auxiliary winding that correspond to a selected phase of an alternating current power source. The auxiliary windings are connected to the motor terminals through a plurality of capacitors, and the auxiliary windings and corresponding capacitors are connected in parallel to the main windings. The main winding and the auxiliary winding of the selected phase are offset by about 60 to about 120 electrical degrees. A power of the plurality of main windings is at least 75% of a power of the polyphase electric motor at full load rating and the power of the plurality of main windings is motoring at 25% of the full load rating.
Claims20
A polyphase electric motor comprising:
- a rotor;
- a stator with a plurality of slots;
- a plurality of main windings installed in the plurality of slots of the stator, a first main winding of the plurality of main windings corresponding to a selected phase of an available alternating current power source;
- and
- a plurality of auxiliary windings installed in the plurality of slots of the stator, a first auxiliary winding of the plurality of auxiliary windings corresponding to the selected phase of the available alternating current power source, the plurality of auxiliary windings being connected to motor terminals of the polyphase electric motor through a plurality of capacitors, the plurality of auxiliary windings and the corresponding capacitors being connected in parallel to the plurality of main windings;
- and
- wherein the first main winding of the selected phase and the first auxiliary winding of the selected phase are offset by about 60 to about 120 electrical degrees;
- and
- wherein the capacitors and windings are sized and configured to provide a power of the plurality of main windings that is at least 75% of a total power of the polyphase electric motor at 100% of a full load rating of the polyphase electric motor and the power of the plurality of main windings is motoring at 25% of the full load rating.
A method of making a polyphase electric motor, the method comprising:
- placing a plurality of main windings into a plurality of slots of a stator;
- placing a plurality of auxiliary windings into the plurality of slots of the stator;
- installing a plurality of capacitors such that the plurality of auxiliary windings being connected to motor terminals of the polyphase electric motor through the plurality of capacitors;
- and
- installing the plurality of auxiliary windings and the corresponding capacitors in parallel to the plurality of main windings;
- and
- wherein a first main winding of the plurality of main windings corresponds to a selected phase lead of the polyphase electric motor and a first auxiliary winding of the plurality of auxiliary windings corresponds to the selected phase lead;
- and
- wherein the first main winding and the first auxiliary winding are offset by about 60 to about 120 electrical degrees;
- and
- wherein the capacitors and windings are sized and configured to provide a power of the plurality of main windings that is at least 75% of a total power of the polyphase electric motor at 100% of a full load rating of the polyphase electric motor and the power of the plurality of main windings that is motoring at 25% of the full load rating.
Dependencies are inferred from the claim text.