公开(公告)号：US20210184550A1

公开(公告)日：2021-06-17

申请号：US17117185

申请日：2020-12-10

Applicant: Wisconsin Alumni Research Foundation

Inventor： Eric Loren Severson ,  Jiahao Chen

IPC: H02K17/16

Abstract: A rotor for a bearingless induction motor is provided. A rotor core defines rotor slots. A rotor winding includes a common connector plate, a plurality of rotor connector plates, and a slot conductor mounted within each rotor slot. The common connector plate is mounted adjacent a first end of the rotor core. The plurality of rotor connector plates is mounted adjacent a second end of the rotor core. Each slot conductor is electrically connected to the common connector plate and to one rotor connector plate of the plurality of rotor connector plates. Each rotor connector plate of the plurality of rotor connector plates is configured to connect a group of slot conductors that includes at least two slot conductors. A number of slot conductors included in the group of slot conductors is defined based on a predefined number of suspension pole pairs selected to provide a radial suspension force.

公开(公告)号：US20240363745A1

公开(公告)日：2024-10-31

申请号：US18308386

申请日：2023-04-27

Applicant: Wisconsin Alumni Research Foundation

Inventor： Chirag Gupta ,  Swarnav Mukhopadhyay ,  Shubhra Shweta Pasayat ,  Jiahao Chen

IPC: H01L29/778 ,  H01L29/06 ,  H01L29/20

CPC classification number: H01L29/7786 ,  H01L29/0607 ,  H01L29/2003

Abstract: Group III-nitride based high electron mobility transistors (HEMTs) are provided. The HEMTs combine a high-aluminum-content barrier layer with a recessed gate that provides the HEMTs with a very low channel sheet resistance and enables high-power, high-frequency operation. A thick barrier layer increases the distance between the two-dimensional electron gas (2DEG) channel and traps at the exposed surface of the group III-nitride barrier layer, thereby reducing or eliminating current collapse. The recessed gate provides a reduced barrier layer thickness below the gate, reducing the distance between the gate and allowing for good modulation of the 2DEG by the gate.

公开(公告)号：US11621620B2

公开(公告)日：2023-04-04

申请号：US17117185

申请日：2020-12-10

Applicant: Wisconsin Alumni Research Foundation

Inventor： Eric Loren Severson ,  Jiahao Chen

IPC: H02K17/16

Abstract: A rotor for a bearingless induction motor is provided. A rotor core defines rotor slots. A rotor winding includes a common connector plate, a plurality of rotor connector plates, and a slot conductor mounted within each rotor slot. The common connector plate is mounted adjacent a first end of the rotor core. The plurality of rotor connector plates is mounted adjacent a second end of the rotor core. Each slot conductor is electrically connected to the common connector plate and to one rotor connector plate of the plurality of rotor connector plates. Each rotor connector plate of the plurality of rotor connector plates is configured to connect a group of slot conductors that includes at least two slot conductors. A number of slot conductors included in the group of slot conductors is defined based on a predefined number of suspension pole pairs selected to provide a radial suspension force.