公开(公告)号：US11309822B2

公开(公告)日：2022-04-19

申请号：US16839989

申请日：2020-04-03

Applicant: Regal Beloit America, Inc.

Inventor： Ludovic Andre Chretien ,  Roger C. Becerra

IPC: H02P27/06 ,  H02P25/022

Abstract: Electric motors and drive circuits therefor are described herein. The drive circuit is configured to operate in a first mode of operation and a second mode of operation. The drive circuit includes an inverter configured to regulate current to a first winding and a second winding of the electric motor in the first mode of operation and to only the first winding in the second mode of operation. The drive circuit also includes a first switch coupled to the second winding and configured to supply line frequency current to the second winding at a first node in the second mode of operation, and a second switch coupled to the second winding and configured to enable selection of regulating current to the second winding using the inverter in the first mode of operation or supplying the line frequency current directly to the second winding in the second mode of operation.

公开(公告)号：US11211882B2

公开(公告)日：2021-12-28

申请号：US16623905

申请日：2017-06-21

Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION

Inventor： Hironori Kawaguchi ,  Akinobu Ando ,  Hiroshi Ogino ,  Yasuaki Matsumoto

IPC: H02P1/16 ,  H02M5/45 ,  H02P23/14 ,  H02P25/022 ,  H02P27/06

Abstract: A thyristor starter accelerates a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In the thyristor starter, during a first time period from start of performance of the second mode to arrival of the induced voltage of the synchronous machine at a first voltage value, a phase control angle of the inverter is changed such that a value thereof becomes larger as a rotation speed of the synchronous machine becomes higher.

公开(公告)号：US20200295696A1

公开(公告)日：2020-09-17

申请号：US16473914

申请日：2018-03-27

Applicant: AISIN AW CO., LTD.

Inventor： Masayuki TAKENAKA ,  Takuro IWASE ,  Akiya KUME ,  Shoji NAGATA ,  Yasuyuki SATO

IPC: H02P27/08 ,  H02M7/5395 ,  H02P25/022

Abstract: A rotary electric machine control device that performs drive control on an AC rotary electric machine using an inverter that converts power between DC power and AC power through pulse width modulation based on a carrier frequency, the rotary electric machine control device including: an electronic control unit that is configured to vary the carrier frequency such that the carrier frequency becomes higher as a rotational speed of the rotary electric machine becomes higher so that carrier sideband frequencies, which are frequencies of sideband waves that appear on higher and lower sides of a center frequency that is set in accordance with the carrier frequency, are not included in a frequency band prescribed in advance.

公开(公告)号：US20200112280A1

公开(公告)日：2020-04-09

申请号：US16153339

申请日：2018-10-05

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Prerit Pramod ,  Aparna Saha ,  Infane O. Lowe

IPC: H02P27/06 ,  H02P25/022 ,  B62D5/04 ,  H02P21/14

Abstract: According to one or more embodiments of the technical solutions described herein, an example method includes determining an input voltage (Vinv) of an inverter in a power circuit. The method further includes measuring an input current (Ii) of the inverter. The method further includes estimating a power supply current from a power supply of the power circuit based on the input voltage and the input current using a state observer and a plant model of the power circuit, the power supply current estimated at a non-steady state. The method further includes performing an active power management of a motor that receives electric power via the inverter.

公开(公告)号：US20200108856A1

公开(公告)日：2020-04-09

申请号：US16152970

申请日：2018-10-05

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Prerit Pramod ,  Zhe Zhang ,  AKM Arafat

IPC: B62D5/04 ,  H02P27/08 ,  H02P25/022

Abstract: Technical solutions are described for inverter commutation techniques for five-phase synchronous motor drives. An example method for five-phase motor control of a five-phase motor in a steering system includes receiving, by a processing device, a commanded modulation index mi, a phase advance angle δ, and a measured position θm. The method further includes generating, by the processing device, five duty cycles for each phase of the five-phase motor based at least in part on the commanded modulation index mi, the phase advance angle δ, and the measured position θm. Each of the duty cycles includes a fundamental component and an injected harmonic component. The method further includes performing, by the processing device, a pulse width modulation technique on each of the five duty cycles to generate on-times for a plurality of switches in phase legs of an inverter.

公开(公告)号：US10526008B1

公开(公告)日：2020-01-07

申请号：US16049921

申请日：2018-07-31

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Haibo Li ,  Prerit Pramod

IPC: H02P7/00 ,  B62D5/04 ,  H02P21/22 ,  H02P6/08 ,  H02P25/022

Abstract: Technical solutions are described for applying machine current limiting in permanent magnet synchronous motors. An example system includes a PMSM and a motor control system. The motor control system is configured to receive a torque command and determine whether the torque command can be satisfied based on a given voltage and a given maximum motor current limit. The motor control system is further configured to, responsive to determining that the torque command can be satisfied, determine a minimum current that satisfies the torque command. The motor control system is further configured to send the minimum current as a minimum current command to the PMSM.

公开(公告)号：US10305408B2

公开(公告)日：2019-05-28

申请号：US16011119

申请日：2018-06-18

Applicant: Purdue Research Foundation

Inventor： Scott Sudhoff ,  Steve Pekarek ,  Omar Abdul Laldin

IPC: H02K1/00 ,  H02P23/00 ,  H02K21/04 ,  H02K16/02 ,  H02P25/022 ,  H02P25/024 ,  H02P9/14

Abstract: A hybrid electrical machine containing surface mounted magnets which includes a magnetically permeable cylindrically shaped stator assembly having at least one stator winding formed about a plurality of stator teeth, a rotor assembly concentrically disposed within the stator assembly, including a magnetically permeable rotor backiron, a rotational drive mechanism coupled to the rotor backiron, and a plurality of protruding rotor poles, each including a magnetically permeable pole support assembly, a winding provided around the pole support assembly, and a radially magnetized permanent magnet assembly disposed about the pole support assembly.

公开(公告)号：US20190089274A1

公开(公告)日：2019-03-21

申请号：US16134089

申请日：2018-09-18

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Sari MAEKAWA ,  Shinichi Kominato ,  Toshimitsu Aizawa ,  Naoki Oomura ,  Junichiro Hagura ,  Sadao Ikeda

IPC: H02P6/08 ,  H02P6/10 ,  H02P6/17 ,  H02P6/18 ,  H02P25/022

Abstract: A motor control integrated circuit according to embodiments outputs predetermined PWM signals to an inverter circuit that drives a synchronous motor and is configured to perform on-off control on a plurality of three-phase bridge connected switching elements in accordance with the PWM signals to convert direct current into three-phase alternating current, and includes: a PWM generation unit configured to generate the signals based on a received speed command value and output the PWM signals; and a current detection unit configured to detect differential values of phase currents at a predetermined time point that is fixed within a period of a carrier wave used for PWM control, based on the carrier wave and a signal generated by a current detector for detecting current conducted to the synchronous motor, wherein the PWM generation unit calculates a speed of the synchronous motor based on the differential values and then, based on the speed, generates the PWM signals to be applied to the synchronous motor.

公开(公告)号：US20180262141A1

公开(公告)日：2018-09-13

申请号：US15564618

申请日：2016-09-05

Applicant: Mitsubishi Electric Corporation

Inventor： Makoto HIGASHINO ,  Satoru TERASHIMA

IPC: H02P21/22 ,  H02M7/537 ,  H02P21/14 ,  H02P25/022 ,  H02P5/50 ,  H02P29/024

CPC classification number: H02P21/22 ,  H02M1/32 ,  H02M7/537 ,  H02M2007/53876 ,  H02P5/50 ,  H02P21/14 ,  H02P25/022 ,  H02P29/024 ,  H02P29/0241

Abstract: A motor control apparatus applied to a structure in which a plurality of synchronous motors connected in parallel and mechanically coupled to each other is driven by a single power converter, includes a vector control unit and an abnormality detection unit. The vector control unit divides a current flowing in/out the synchronous motors into a q-axis current and a d-axis current and individually controls the divided currents based on a q-axis current command value and a d-axis current command value. The abnormality detection unit detects whether at least one synchronous motor is wrongly wired or is disconnected based on a q-axis inductance, the q-axis current command value, a rotation speed of the synchronous motors, and a d-axis voltage command value.

公开(公告)号：US20180234040A1

公开(公告)日：2018-08-16

申请号：US15739447

申请日：2016-06-15

Applicant: NIDEC SANKYO CORPORATION

Inventor： Mitsuo YOKOZAWA

IPC: H02P6/16 ,  H02K29/08 ,  H02P25/022

CPC classification number: H02P6/16 ,  H02K29/08 ,  H02P25/022 ,  H02P25/024

Abstract: A motor may include a rotor; a stator; a first Hall element and a second Hall element which face a drive magnet provided in the rotor at different angular positions, a storage section configured to store reference data prepared by associating a rotation position of the rotor with a signal of the first Hall element obtained at the rotation position and a signal of the second Hall element obtained at the rotation position; and a position detection section configured to obtain a rotation position of a detection target by referring to the reference data based on a first signal and a second signal wherein, when the rotor is located at the rotation position of the detection target, a signal of the first Hall element is referred to as the first signal and a signal of the second Hall element is referred to as the second signal.