公开(公告)号：US20230246571A1

公开(公告)日：2023-08-03

申请号：US18158112

申请日：2023-01-23

Applicant: Hamilton Sundstrand Corporation

Inventor： Andrei DINU ,  Stefanos SKOULAXINOS ,  Jonathan Mark ROADLEY-BATTIN

IPC: H02P6/21

CPC classification number: H02P6/21

Abstract: Methods of operating electric motor systems that comprise electric motors comprising a rotor having a magnet mounted thereto. The electric motor is initially operated in an open loop mode in which the rotor angle is estimated based on the input voltage frequency. Once the motor is running at sufficient speed, a transition to closed loop mode operation is performed, wherein the rotor angle is determined using an observed back EMF. To provide a smoother open loop to closed loop transition, the rotor angle is determined during a transition period as a function of both the open loop rotor angle and the closed loop rotor angle.

公开(公告)号：US20230027564A1

公开(公告)日：2023-01-26

申请号：US17840827

申请日：2022-06-15

Applicant: Hamilton Sundstrand Corporation

Inventor： Diarmaid John HOGAN ,  Andrei DINU ,  Rodrigo FERNANDEZ-MATTOS

IPC: H02P5/46 ,  H02K11/33 ,  H02P27/08

Abstract: A system for controlling one or more loads. The system comprises a plurality of power converters, wherein each power converter is configured to be arranged in a parallel configuration with one or more additional power converters so as to control the one or more loads, and a central controller configured to output a common reference based on local current or voltage values received from each power converter; and transmit the common reference to each of the power converters. Each power converter comprises an inverter configured to control the one or more loads based on voltage switching signals, a module configured to provide the voltage switching signals to the inverter according to a modulation scheme.