Patent ID: 11926221
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Transport (Mechanical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 8:
9. An electric powertrain comprising:
a variable flux machine (VFM); and
a controller in communication with the VFM, and configured to:
during a shunt angle transition of the VFM, receive a commanded shunt angle and a measured shunt angle of the VFM when operating the VFM in a predetermined control region;
calculate a d-axis delta current (ΔId) term and a q-axis delta current (ΔIq) term required to maintain an output torque level of the VFM through a duration of the shunt angle transition; and
apply the required ΔId term and the required ΔId term as feed-forward terms to respectively adjust a d-axis current (Id) term and a q-axis current (Iq) term from a respective lookup table, and to thereby maintain the output torque level of the VFM during the shunt angle transition.