US 12,407,226 B2
Wound-rotor electric machine
Peng Peng, Novi, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Jul. 15, 2022, as Appl. No. 17/812,823.
Prior Publication US 2024/0022141 A1, Jan. 18, 2024
Int. Cl. H02K 11/33 (2016.01); H02K 3/28 (2006.01); H02K 19/10 (2006.01); H02K 21/22 (2006.01)
CPC H02K 11/33 (2016.01) [H02K 3/28 (2013.01); H02K 19/10 (2013.01); H02K 21/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for converting energy, the system comprising:
a doubly-fed induction machine including:
a rotor having a plurality of rotor windings; and
a stator having a plurality of stator windings;
a power conversion unit in electrical communication with the plurality of rotor windings, wherein the power conversion unit is configured to excite the plurality of rotor windings with an alternating current;
a relay unit in electrical communication with the plurality of stator windings, wherein the relay unit is configured to electrically interconnect a plurality of terminals of the plurality of stator windings; and
a controller in electrical communication with the power conversion unit and the relay unit, wherein the controller is programmed to:
determine a rotational velocity of the rotor; and
adjust an operation of the doubly-fed induction machine based on the rotational velocity of the rotor by using the power conversion unit to excite the plurality of rotor windings with one of: a first phase configuration to provide a first quantity of effective poles and a second phase configuration to provide a second quantity of effective poles and by using the relay unit to electrically interconnect one or more of the plurality of terminals of the plurality of stator windings in one of: a first connection configuration to provide the first quantity of effective poles and a second connection configuration to provide the second quantity of effective poles.