公开(公告)号：US12263746B2

公开(公告)日：2025-04-01

申请号：US18415333

申请日：2024-01-17

Applicant: The Trustees of Columbia University in the City of New York ,  Longmax Corporation Ltd.

Inventor： William-Michael Eull ,  Liwei Zhou ,  Weizhong Wang ,  Gangqi Cen ,  Matthias Preindl

IPC: H02J7/00 ,  B60L53/30 ,  H02J7/06 ,  H02M1/44 ,  H02M3/158 ,  H02M7/219

Abstract: A system may mitigate leakage currents in charging stations for electric vehicles. The system may include a bank of one or more parallel capacitors per phase electrically coupled to an AC voltage source, wherein a neutral point of the one or more parallel capacitors is electrically coupled to a DC ground; a bank of one or more inductors per phase electrically coupled to the one or more parallel capacitors, wherein each inductor is in series with and downstream from one capacitor; a rectifier electrically coupled to and downstream from the one or more parallel inductors, wherein the rectifier converts the AC voltage source to a DC voltage for supply to a battery; a DC bus electrically coupled to the rectifier; and a controller, wherein the controller is configured to mitigate leakage currents by controlling a voltage of at least one of the bank of one or more parallel capacitors.

公开(公告)号：US20240125865A1

公开(公告)日：2024-04-18

申请号：US18376576

申请日：2023-10-04

Applicant: The Trustees of Columbia University in the City of New York

Inventor： Alan Gen Li ,  Alan C. West ,  Matthias Preindl

IPC: G01R31/392 ,  G01R31/367 ,  G01R31/3835

CPC classification number: G01R31/392 ,  G01R31/367 ,  G01R31/3835

Abstract: Disclosed are systems, methods, and other implementations, including a method for managing battery performance that includes measuring voltage response data for a lithium-ion battery in response to a current pulse perturbation injected into the lithium-ion battery, and determining in real-time, based on the measured voltage response data, resultant degradation data representative of estimated physical degradation of the lithium-ion battery.

公开(公告)号：US11671042B2

公开(公告)日：2023-06-06

申请号：US17484313

申请日：2021-09-24

Applicant: The Trustees of Columbia University in the City of New York

Inventor： Matthias Preindl

IPC: H02P21/13 ,  H02P21/18 ,  H03H21/00

CPC classification number: H02P21/13 ,  H02P21/18 ,  H03H21/0043 ,  H03H2021/0061

Abstract: Disclosed are implementations, including a method that includes obtaining measurement samples relating to electrical operation of an electric motor drive providing power to an electric motor, deriving, based on the samples, instantaneous estimates for parameters characterizing speed and/or position of the motor according to an optimization process based on a cost function defined for the samples, and applying a filtering operation to the instantaneous estimates to generate filtered values of the motor's speed and/or position. The filtering operation includes computing the filtered values using the derived instantaneous estimates in response to a determination that a computed convexity of the cost function is greater than or equal to a convexity threshold value, and/or applying a least-squares filtering operation to the derived instantaneous estimates and using at least one set of previous estimates derived according to the optimization process applied to previous measurement samples.

公开(公告)号：US20220271549A1

公开(公告)日：2022-08-25

申请号：US17497537

申请日：2021-10-08

Applicant: The Trustees of Columbia University in the City of New York ,  McMaster University

Inventor： Ephram Chemali ,  Matthias Preindl

IPC: H02J7/00 ,  G06N3/04 ,  G01R31/382

Abstract: An approach to control or monitoring of battery operation makes use of a recurrent neural network (RNN), which receives one or more battery attributes for a Lithium ion (Li-ion) battery, and determines, based on the received one or more battery attributes, a state-of-charge (SOC) estimate for the Li-ion battery.

公开(公告)号：US11159112B2

公开(公告)日：2021-10-26

申请号：US16697630

申请日：2019-11-27

Applicant: The Trustees of Columbia University in the City of New York

Inventor： Matthias Preindl

IPC: H02P21/13 ,  H02P21/18 ,  H03H21/00

Abstract: Disclosed are implementations, including a method that includes obtaining measurement samples relating to electrical operation of an electric motor drive providing power to an electric motor, deriving, based on the samples, instantaneous estimates for parameters characterizing speed and/or position of the motor according to an optimization process based on a cost function defined for the samples, and applying a filtering operation to the instantaneous estimates to generate filtered values of the motor's speed and/or position. The filtering operation includes computing the filtered values using the derived instantaneous estimates in response to a determination that a computed convexity of the cost function is greater than or equal to a convexity threshold value, and/or applying a least-squares filtering operation to the derived instantaneous estimates and using at least one set of previous estimates derived according to the optimization process applied to previous measurement samples.

公开(公告)号：US12301140B2

公开(公告)日：2025-05-13

申请号：US18137874

申请日：2023-04-21

Applicant: The Trustees of Columbia University in the City of New York

Inventor： Matthias Preindl

IPC: H02P21/13 ,  H02P21/18 ,  H03H21/00

Abstract: Disclosed are implementations, including a method that includes obtaining measurement samples relating to electrical operation of an electric motor drive providing power to an electric motor, deriving, based on the samples, instantaneous estimates for parameters characterizing speed and/or position of the motor according to an optimization process based on a cost function defined for the samples, and applying a filtering operation to the instantaneous estimates to generate filtered values of the motor's speed and/or position. The filtering operation includes computing the filtered values using the derived instantaneous estimates in response to a determination that a computed convexity of the cost function is greater than or equal to a convexity threshold value, and/or applying a least-squares filtering operation to the derived instantaneous estimates and using at least one set of previous estimates derived according to the optimization process applied to previous measurement samples.

公开(公告)号：US20240348172A1

公开(公告)日：2024-10-17

申请号：US18292315

申请日：2022-07-27

Applicant: The Trustees of Columbia University in the City of New York

Inventor： Matthias Preindl ,  Liwei Zhou ,  William-Michael Eull ,  Matthew Jahnes

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/12 ,  H02M1/14 ,  H02M1/44 ,  H02M3/00 ,  H02M7/797

CPC classification number: H02M3/33571 ,  H02M1/0058 ,  H02M1/126 ,  H02M1/14 ,  H02M3/01 ,  H02M7/797 ,  H02M1/009 ,  H02M1/44 ,  H02M3/33584

Abstract: Systems and methods for a high-efficiency power converter incorporating a half-bridge topology with one or more an additional upper capacitor and a drain-source capacitor. The converter includes DC voltage terminals and a DC link capacitor coupled across a positive and negative DC terminal of the DC voltage terminals. The converter further includes a power switching element pair including a high side switch and a low side switch coupled together at a midpoint node. The converter further includes an LC filter having a switch-side inductor, a lower capacitor coupled between a second end of switch-side inductor and the negative DC terminal; and an upper capacitor coupled between the second end of the switch-side inductor and the positive DC terminal. The converter may further include drain-source capacitors coupled across the drain and source terminals of the switches.

公开(公告)号：US11171498B2

公开(公告)日：2021-11-09

申请号：US16194596

申请日：2018-11-19

Applicant: The Trustees of Columbia University in the City of New York

Inventor： Ephram Chemali ,  Matthias Preindl

IPC: H02J7/00 ,  G06N3/04 ,  G01R31/382 ,  H01M10/42

Abstract: An approach to control or monitoring of battery operation makes use of a recurrent neural network (RNN), which receives one or more battery attributes for a Lithium ion (Li-ion) battery, and determines, based on the received one or more battery attributes, a state-of-charge (SOC) estimate for the Li-ion battery.

公开(公告)号：US20200177117A1

公开(公告)日：2020-06-04

申请号：US16697630

申请日：2019-11-27

Applicant: The Trustees of Columbia University in the City of New York

Inventor： Matthias Preindl

IPC: H02P21/13 ,  H03H21/00 ,  H02P21/18

Abstract: Disclosed are implementations, including a method that includes obtaining measurement samples relating to electrical operation of an electric motor drive providing power to an electric motor, deriving, based on the samples, instantaneous estimates for parameters characterizing speed and/or position of the motor according to an optimization process based on a cost function defined for the samples, and applying a filtering operation to the instantaneous estimates to generate filtered values of the motor's speed and/or position. The filtering operation includes computing the filtered values using the derived instantaneous estimates in response to a determination that a computed convexity of the cost function is greater than or equal to a convexity threshold value, and/or applying a least-squares filtering operation to the derived instantaneous estimates and using at least one set of previous estimates derived according to the optimization process applied to previous measurement samples.

公开(公告)号：US20250096709A1

公开(公告)日：2025-03-20

申请号：US18730268

申请日：2023-01-27

Applicant: Tau Motors, Inc. ,  The Trustees of Columbia University in the City of New York

Inventor： Matthias Preindl ,  Bernard William Steyaert ,  Ethan Bagget Swint ,  Nick Marshall Vazquez ,  Walter Wesley Pennington, III

IPC: H02P21/00

Abstract: Disclosed are systems and methods for motor control using piecewise affine modelling. An electronic controller may determine current values for a motor in a rotational reference frame. Each current value may be associated with a dimension of a set of dimensions of the rotational reference frame. The electronic controller may further determine, based on the current values, a flux linkage value for each of the set of dimensions of the rotational reference frame using a piecewise affine map. The electronic controller may further determine a target flux linkage value for each of the set of dimensions of the rotational reference frame. The electronic controller may then control a power switching network coupled between a power supply and the motor based on the flux linkage values and the target flux linkage values.