公开(公告)号：US20230318499A1

公开(公告)日：2023-10-05

申请号：US18192366

申请日：2023-03-29

Applicant: Danfoss Power Electronics A/S

Inventor： Ana-Mari Tataru Kjær ,  Sanjeet Kumar Dwivedi ,  Thiruvenkadam Madhulingam ,  Katuri Gudaru Venkaiah

IPC: H02P21/14 ,  G01R19/04

CPC classification number: H02P21/14 ,  G01R19/04

Abstract: A method for determining a motor type of an electric motor includes several phases, wherein two or more pulses are applied to the motor, respective currents are measured and the motor type is determined based on the pulses. Further, a motor control apparatus is configured to perform such a method.

公开(公告)号：US20170139011A1

公开(公告)日：2017-05-18

申请号：US15322340

申请日：2014-07-08

Applicant: DANFOSS POWER ELECTRONICS A/S

Inventor： Nicolas Trolle ,  Sanjeet Kumar Dwivedi

IPC: G01R31/34

CPC classification number: G01R31/34 ,  H02P23/14

Abstract: An algorithm for identifying a motor type of a multi-phase (typically 3-phase) motor is described. The algorithm applies a series of active voltage vector pulses to the phases of the motor and measures the current rise-time for each applied voltage vector. The motor type is determined on the basis of the measured current rise-times.

公开(公告)号：US20240045000A1

公开(公告)日：2024-02-08

申请号：US18366272

申请日：2023-08-07

Applicant: Danfoss Power Electronics A/S

Inventor： Sanjeet Kumar Dwivedi ,  Thiruvenkadam Madhulingam ,  Anandarao Bongu

IPC: G01R31/52 ,  G01R31/72

CPC classification number: G01R31/52 ,  G01R31/72 ,  H02P29/024

Abstract: A method for detecting a short circuit in a winding of an electric motor being driven by a drive, the method includes measuring respective phase currents of the windings, transforming the phase currents to negative sequence components, and comparing the negative sequence components with respective baseline values. A corresponding control unit is further disclosed.

公开(公告)号：US20190222156A1

公开(公告)日：2019-07-18

申请号：US16079635

申请日：2016-03-07

Applicant: Danfoss Power Electronics A/S

Inventor： Nicolas Trolle ,  Sanjeet Kumar Dwivedi

IPC: H02P23/14 ,  H02P27/06

CPC classification number: H02P23/14 ,  H02P21/16 ,  H02P27/06

Abstract: A method (400) of determining equivalent circuit parameters of a three phase induction motor is provided. The method (400) comprises applying (410) a current to a stator winding (362) of an induction motor (360), and varying (420) a voltage applied to the stator winding to regulate the applied current to be a constant current. Application of the current is terminated (430) when the applied voltage has reached a constant voltage. The equivalent circuit parameters are determined (440) from the value of the constant current, the values of the applied voltage, and a time period until the applied voltage attains the constant voltage. The method may provide values for a resistance (210) of the stator winding, a resistance (250) of a rotor winding (364), a magnetizing inductance (230), and a total inductance leakage value (220, 240) for the stator winding and the rotor winding.

公开(公告)号：US20230194630A1

公开(公告)日：2023-06-22

申请号：US18067862

申请日：2022-12-19

Applicant: Danfoss Power Electronics A/S

Inventor： Lucian Asiminoaei ,  Luzia Almeida ,  Jörg Dannehl ,  Sanjeet Kumar Dwivedi ,  Norbert Hanigovszki

IPC: G01R31/64 ,  G01R23/15

CPC classification number: G01R31/64 ,  G01R23/15 ,  H03H7/0115

Abstract: The present invention is directed at a method for evaluating the degradation level of capacitors of a power filter connected to an adjustable speed drive (ASD) or a power converter. The invention is also directed at an adjustable speed drive and a power converter provided for performing the method.

公开(公告)号：US10944348B2

公开(公告)日：2021-03-09

申请号：US16079635

申请日：2016-03-07

Applicant: Danfoss Power Electronics A/S

Inventor： Nicolas Trolle ,  Sanjeet Kumar Dwivedi

IPC: G01R15/00 ,  H02P23/14 ,  H02P21/16 ,  H02P27/06 ,  H02P21/14

Abstract: A method (400) of determining equivalent circuit parameters of a three phase induction motor is provided. The method (400) comprises applying (410) a current to a stator winding (362) of an induction motor (360), and varying (420) a voltage applied to the stator winding to regulate the applied current to be a constant current. Application of the current is terminated (430) when the applied voltage has reached a constant voltage. The equivalent circuit parameters are determined (440) from the value of the constant current, the values of the applied voltage, and a time period until the applied voltage attains the constant voltage. The method may provide values for a resistance (210) of the stator winding, a resistance (250) of a rotor winding (364), a magnetizing inductance (230), and a total inductance leakage value (220, 240) for the stator winding and the rotor winding.

公开(公告)号：US10359472B2

公开(公告)日：2019-07-23

申请号：US15322340

申请日：2014-07-08

Applicant: DANFOSS POWER ELECTRONICS A/S

Inventor： Nicolas Trolle ,  Sanjeet Kumar Dwivedi

IPC: G01R31/34 ,  H02P23/14

Abstract: An algorithm for identifying a motor type of a multi-phase (typically 3-phase) motor is described. The algorithm applies a series of active voltage vector pulses to the phases of the motor and measures the current rise-time for each applied voltage vector. The motor type is determined on the basis of the measured current rise-times.