公开(公告)号：US20240063744A1

公开(公告)日：2024-02-22

申请号：US18452050

申请日：2023-08-18

Applicant: Tula eTechnology, Inc.

Inventor： Zakirul ISLAM ,  Paul CARVELL ,  Philippe FARAH

IPC: H02P27/08

CPC classification number: H02P27/085

Abstract: An electric machine comprising a power supply and an electrically excited synchronous machine is provided. The electrically excited synchronous machine comprises a stator with stator windings and a rotor with a plurality of rotor poles, wherein the rotor has a magnetic field knee region and rotor field windings around the plurality of rotor poles. A power converter is coupled between the power supply and the electrically excited synchronous machine. The power converter is arranged to provide a pulsed operation by providing a pulsed current to the stator windings and a pulsed DC current to the rotor field windings, wherein the pulsed DC current continuously provides a magnetic field in the rotor.

公开(公告)号：US20230114289A1

公开(公告)日：2023-04-13

申请号：US17963069

申请日：2022-10-10

Applicant: Tula eTechnology, Inc.

Inventor： Zakirul ISLAM ,  Vijay SRINIVASAN

IPC: H02P5/74

Abstract: A variety of methods, controllers, and electric machine systems are described that facilitate pulsed control of multiple electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machines and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.

公开(公告)号：US20240063735A1

公开(公告)日：2024-02-22

申请号：US18452260

申请日：2023-08-18

Applicant: Tula eTechnology, Inc.

Inventor： Zakirul ISLAM ,  Paul CARVELL ,  Philippe FARAH

IPC: H02P7/298

CPC classification number: H02P7/298

Abstract: An electric machine, comprising a power supply and an electrically excited synchronous machine is provided. The electrically excited synchronous machine comprises a stator with stator windings, a rotor, comprising rotor poles with field windings and a plurality of permanent magnets magnetically connected to the rotor pole. A power converter is coupled between the power supply and the electrically excited synchronous machine, the power converter is arranged to provide a pulsed operation by providing a pulsed AC current to the stator windings and a pulsed DC current to the rotor field windings, wherein the pulsed DC current to the rotor field windings causes the rotor poles to have a magnetic orientation that has a same magnetic orientation as the permanent magnets magnetically connected to the rotor poles.

公开(公告)号：US20210384851A1

公开(公告)日：2021-12-09

申请号：US17411764

申请日：2021-08-25

Applicant: Tula eTechnology, Inc.

Inventor： Zakirul ISLAM

IPC: H02P5/747 ,  H02K51/00 ,  B60K1/02

Abstract: A magnetically de-coupled, separately controlled, electric machine assembly including a radial and one or more axial electric machines, each with rotors mechanically coupled to and arranged to directly drive a single shaft. Each of the electric machines are independently, but cooperatively, controlled by an inverter unit that includes one or more inverters. The axial and radial electric machines are contained in a single housing.