公开(公告)号：US20230308040A1

公开(公告)日：2023-09-28

申请号：US18184569

申请日：2023-03-15

Applicant: Tula eTechnology, Inc.

Inventor： Philippe FARAH ,  Paul CARVELL

IPC: H02P27/08 ,  H02P23/30 ,  H02P25/022

CPC classification number: H02P27/08 ,  H02P23/30 ,  H02P25/022

Abstract: An electric machine is provided. A power converter is coupled between a power supply and a wound field synchronous machine. The power converter is arranged to provide a pulsed operation by providing a pulsed DC current to field windings of the wound field synchronous machine.

公开(公告)号：US20220024322A1

公开(公告)日：2022-01-27

申请号：US17497147

申请日：2021-10-08

Applicant: Tula eTechnology, Inc.

Inventor： Paul CARVELL ,  Adya S. TRIPATHI

IPC: B60L15/08 ,  H02P23/00 ,  B60L15/20 ,  H02P23/02

Abstract: Modulated pulse control of electric machines to deliver a desired output in a more energy efficient manner by either (a) operating the electric machine in a continuous mode when a requested torque demand is greater than the peak efficiency torque of the electric machine or (b) in a pulsed modulation mode when the requested torque demand is less than the peak efficiency torque of the electric machine. When operating in the pulsed modulation mode, the inverter may be deactivated to further improve the system efficiency when field weakening is not required to mitigate or eliminate generation of a retarding torque in situations when Back Electromagnetic Force (BEMF) exceeds a supply voltage for the inverter of the machine.

公开(公告)号：US20210159836A1

公开(公告)日：2021-05-27

申请号：US17166646

申请日：2021-02-03

Applicant: Tula eTechnology, Inc.

Inventor： Babak MAZDA ,  Adya S. TRIPATHI ,  Paul CARVELL

IPC: H02P27/08

Abstract: A boost circuit is arranged to reduce rise and fall times of pulsed power used for pulsed control operation of electric machines. Magnetic energy present in the electric machine at the end of a pulse is extracted by the boost circuit to reduce the pulse fall time. The energy is stored by the boost circuit and then applied at the beginning of a subsequent pulse to reduce the rise time. By reducing rise and fall times compared to not using such a boost circuit, machine efficiency is improved.

公开(公告)号：US20250121701A1

公开(公告)日：2025-04-17

申请号：US18488442

申请日：2023-10-17

Applicant: Tula eTechnology, Inc.

Inventor： Paul CARVELL

IPC: B60L15/20 ,  B60L15/04 ,  B60L15/08 ,  B60W10/08 ,  H02P6/08

Abstract: Various boost circuits that are used to improve or reduce the time needed to transition an electric machine from an off-state to an on-state at the start of a next pulse during pulsed controlled operation. With these various boost circuits, the naturally generated Back Electromotive Force or “BEMF” that is induced when an electrical machine transitions from the on state to the off state at the end of an on pulse is harvested, rectified, and stored on a storage device. The harvested energy is then made available to the electric machine as a “boost” voltage at the onset of the next on pulse, resulting in a reduced transition time from the off-state to the on-state.

公开(公告)号：US20240364250A1

公开(公告)日：2024-10-31

申请号：US18630634

申请日：2024-04-09

Applicant: Tula eTechnology, Inc.

Inventor： Paul CARVELL

IPC: H02P27/05

CPC classification number: H02P27/05

Abstract: An apparatus is provided comprising a power supply, an externally excited synchronous machine (EESM) comprising a stator and rotor, and a controller coupled between the power supply and the EESM, the controller arranged to maintain flux in the rotor during a pulsed operation, so that when the EESM is in a pulse off state flux is maintained in the rotor.

公开(公告)号：US20240291410A1

公开(公告)日：2024-08-29

申请号：US18589010

申请日：2024-02-27

Applicant: Tula eTechnology, Inc.

Inventor： Paul CARVELL ,  Benjamin M. WOLK ,  Matthew A. YOUNKINS

IPC: H02P21/30 ,  H02P21/18 ,  H02P27/06

CPC classification number: H02P21/30 ,  H02P21/18 ,  H02P27/06 ,  H02P2207/05

Abstract: An electric machine is provided. A polyphase machine comprising at least one of an induction machine and an externally excited synchronous machine is provided. A power inverter is electrically connected to the polyphase machine. An inverter controller is electrically connected to the power inverter, wherein the inverter controller is configured to provide a torque command, wherein the torque command provides a torque signal to provide a plurality of pulses that pulse between a first demand torque level and a second demand torque level, wherein the second demand torque level is lower in amplitude than an amplitude of the first demand torque level and control an id provided by the power inverter, so that when the torque signal is at the first demand torque level, rotor flux strictly increases and when the torque signal is at the second demand torque level, rotor flux strictly decreases.

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：US20220399844A1

公开(公告)日：2022-12-15

申请号：US17839254

申请日：2022-06-13

Applicant: Tula eTechnology, Inc.

Inventor： Paul CARVELL ,  Amnish SINGH ,  Tate Allen COOPER

IPC: H02P21/00 ,  H02P27/08

Abstract: An electric machine is provided. A polyphase machine is provided. A power inverter is electrically connected to the polyphase machine. A controller is electrically connected to the power inverter, wherein the controller provides switching signals to the power inverter, wherein the controller comprises a trajectory calculator that provides an optimized trajectory for transitioning the polyphase machine from a first torque to a second torque.

公开(公告)号：US20220311369A1

公开(公告)日：2022-09-29

申请号：US17682742

申请日：2022-02-28

Applicant: Tula eTechnology, Inc.

Inventor： Paul CARVELL

IPC: H02P25/22 ,  H02K1/16 ,  H02K1/18 ,  H02K1/26 ,  H02K3/28

Abstract: Methods, controllers and electric machine systems are described for multi-phase control of electric machines (e.g., electric motors and generators).

公开(公告)号：US20210351733A1

公开(公告)日：2021-11-11

申请号：US16866917

申请日：2020-05-05

Applicant: Tula eTechnology, Inc.

Inventor： Paul CARVELL

IPC: H02P23/04 ,  H02P27/08

Abstract: A variety of methods, controllers and electric machine systems are described that facilitate pulsed control of electric machines to improve the energy efficiency of the electric machine when conditions warrant. Selected transitions between pulsing output levels are controlled to provide a cubic or higher order transition torque profile. In various implementations, cubic, quintic or higher order transition profiles are use. The use of such transition torque profiles can improve NVH characteristics of the electric machine while providing energy efficient pulse transitions.