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：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：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.