公开(公告)号：US10742157B2

公开(公告)日：2020-08-11

申请号：US16284531

申请日：2019-02-25

Applicant: Hyundai Motor Company ,  Kia Motors Corporation

Inventor： YoungJin Shin ,  Dongyeon Han ,  Sanghoon Moon ,  Kyungsoo Park ,  WoongChan Chae ,  Hyoungjun Cho ,  Jung Shik Kim

IPC: H02P29/66 ,  B60L50/60 ,  B60L15/20

Abstract: A vehicle and method of controlling the same are provided in which the performance of an electric motor is prevented from being degraded by efficiently and more accurately calculating the temperature of a permanent magnet within the electric motor to adjust the amount of power supplied to the electric motor. The vehicle includes an electric motor having a stator, a rotor, and a permanent magnet and a sensor that measures the temperature of the electric motor. An inverter drives the electric motor and a controller generates a predetermined heat quantity by supplying power to the electric motor to calculate the temperature of the permanent magnet based on the temperature of the electric motor at a predetermined point measured using the sensor. When the temperature of the permanent magnet exceeds a predetermined temperature, the controller reduces the supply of the power.

公开(公告)号：US20190375449A1

公开(公告)日：2019-12-12

申请号：US16479254

申请日：2018-02-13

Applicant: NSK LTD.

Inventor： Hiroaki TAKASE ,  Ryo MINAKI ,  Hideki SAWADA ,  Takayoshi SUGAWARA

IPC: B62D5/04 ,  H02P21/06 ,  H02P21/22 ,  H02P27/08 ,  H02P29/66 ,  H02M1/38

Abstract: An electric power steering apparatus of a vector control system that drives and controls a motor by an inverter and applies an assist torque to a steering system of a vehicle, including the first compensation function to perform a dead time (DT) compensation based on respective phase motor terminal voltages and respective phase duty command values, the second compensation function to perform a DT compensation based on steering assist command values, the third compensation function to perform the DT compensation based on dq-axis current command values, and a temperature detecting section to detect temperature of ECU, wherein the correction of the DT compensation is performed based on the temperature, wherein switches of the compensation functions are performed by using a conditional branch due to software and a gradual-changing switch, wherein the dq-axis DT compensation values after the conditional branch and the gradual-changing switch are performed are calculated, and wherein the dq-axis voltage command values are compensated by the dq-axis DT compensation values.

公开(公告)号：US10469015B2

公开(公告)日：2019-11-05

申请号：US15569288

申请日：2015-06-22

Applicant: Mitsubishi Electric Corporation

Inventor： Shingo Harada ,  Keiichi Enoki ,  Yasukazu Murata ,  Masutaka Watanabe ,  Yoshimasa Nishijima

IPC: H02P21/22 ,  H02P29/66 ,  H02P21/14 ,  H02P21/00 ,  B60L15/02 ,  H02P6/17

Abstract: A motor control device having a motor temperature sensor for detecting a magnet temperature of the motor, a magnet magnetic flux calculation section that calculates a magnet magnetic flux of the motor corresponding to the magnet temperature of the motor, a current combination candidate calculating section that calculates a d-q axis current combination candidate that minimizes the input current of the inverter within a voltage limit ellipse determined by a value that can be output by a voltage of a power supply of the motor, and a d-q axis current search section that searches the d-q axis current that minimizes the input current of the inverter within the range of the combination candidate of the d-q axis currents when the d-q axis current of the motor moves on a voltage limiting ellipse by automatic weakening flux control.

公开(公告)号：US10457159B1

公开(公告)日：2019-10-29

申请号：US15250906

申请日：2016-08-29

Applicant: Motiv Power Systems, Inc.

Inventor： Jim Michael Castelaz ,  Elias Stein ,  William Treichler

IPC: H02J1/10 ,  H02J3/06 ,  H02J3/46 ,  B60L53/22 ,  H02P27/06 ,  H02P29/66 ,  B60L1/02

Abstract: A system comprises a plurality of power converters, a plurality of energy storage systems, a first common node, a second common node, and zero-reference voltage node. Each power converter is coupled between one energy storage system and the first and second common nodes. The system operates to regulate power between the power converters and the first and second common nodes. Each power converter is a bi-directional power converter and each energy storage system is a battery pack. In one example, the first common node is regulated to a voltage VSPAN, and the second common node is regulated to a voltage VSCN which is the mean of all voltages output by the battery packs. In another example, the first common node is regulated to a voltage −VSPAN, and the second common node is regulated to a voltage +VSPAN. No power converter processes more than voltage VSPAN yielding high-efficiency power conversion.

公开(公告)号：US10447096B2

公开(公告)日：2019-10-15

申请号：US15538065

申请日：2015-11-18

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Junji Kitao ,  Moriyuki Hazeyama ,  Yoshihiro Miyama ,  Takeshi Mori ,  Akihiro Daikoku

IPC: H02K1/16 ,  H02P27/06 ,  H02K1/27 ,  H02P21/06 ,  H02P25/22 ,  H02K1/14 ,  H02P29/66 ,  H02K29/03 ,  H02P21/14

Abstract: Given a first intersection point of the surface of a rotor and a straight line that joins a central point of a permanent magnet on a stator side and a tooth tip section closest to the central point of the permanent magnet on the stator side, a flange is formed outward of an arc having, as the radius thereof, a distance from a second intersection point of the inner peripheral face of the stator and a straight line that joins the rotation axis of the rotor and the first intersection point, up to the tooth tip section.

公开(公告)号：US10418929B2

公开(公告)日：2019-09-17

申请号：US15547546

申请日：2016-01-18

Applicant: MITSUBISHI ELECTRIC CORPORATION

Inventor： Junichi Aizawa ,  Yoshikazu Nakano ,  Akihiro Daikoku ,  Shota Hanioka

IPC: G09F9/40 ,  H02P29/66 ,  H02P6/16 ,  H02P21/00 ,  H02P27/04

Abstract: Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.

公开(公告)号：US10396702B2

公开(公告)日：2019-08-27

申请号：US15550579

申请日：2016-01-20

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Katsuhiro Hoshino ,  Toshisada Mitsui ,  Seigo Yukutake ,  Hideki Miyazaki

IPC: H02P23/00 ,  H02P29/66 ,  H02P6/12 ,  H02P6/28 ,  G01R31/34 ,  H02M7/5387 ,  H02P25/16

Abstract: A motor drive control device is a device which drives and controls a permanent magnet synchronous motor in which each phase is independently controlled, and includes a 0-axis current calculation unit which calculates and outputs a 0-axis current iz on the basis of a motor current; a 0-axis current determination unit which compares and determines a reference 0-axis current value izs, which is the 0-axis current value when the temperature of a permanent magnet provided in the permanent magnet synchronous motor is a reference temperature with the calculated 0-axis current iz; and a switching signal generation unit which drives and controls inverters on the basis of the result of comparison determination of the 0-axis current determination unit.

公开(公告)号：US10298168B2

公开(公告)日：2019-05-21

申请号：US15592636

申请日：2017-05-11

Applicant: Schweitzer Engineering Laboratories, Inc.

Inventor： Marcos A. Donolo

IPC: H02P6/20 ,  H02P6/34 ,  G06F17/50 ,  H02P29/66

Abstract: The present disclosure pertains to systems and methods configured to monitor and protect an electric motor during startup using a motor model. The motor model parameters may be calculated using measurements taken during a calibration start of the electric motor. The measurements may include slip, stator current, stator voltage, frequency, and/or other electrical or physical parameters. In some embodiments, the motor model parameters may be calculated by minimizing the difference between a measured slip and a calculated slip. The motor model may comprise a variety of parameters used to determine operation parameters of the motor during the startup. In one specific embodiment, the motor model may determine a thermal capacity used (TCU). The TCU may be compared to a threshold value to determine whether protective action is necessary.

公开(公告)号：US10224832B2

公开(公告)日：2019-03-05

申请号：US15448288

申请日：2017-03-02

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yuichi Goto ,  Hiroshi Mochikawa

IPC: H02P6/08 ,  H02P29/66 ,  G01K13/08 ,  G01R31/34 ,  H02K21/00 ,  H02P7/28 ,  H03K17/687 ,  H02M7/5387 ,  H03K17/74 ,  H02M1/00

Abstract: A power conversion device includes a first switch and a second switch connected in series between a positive electrode and a negative electrode of a first power supply. A first node is between the first and second switches. The first node can be connected to a load. A first diode has an anode connected to the first node and a cathode connected to the positive electrode of the first power supply. A third switch is connected between a positive electrode of a second power supply and the positive electrode of the first power supply. A first timer is connected to a gate electrode of the third switch. A first comparator has a first input that is connected to a gate electrode of the first switch, a second input at which a reference voltage can be received, and an output that is connected to the first timer.

公开(公告)号：US20190028053A1

公开(公告)日：2019-01-24

申请号：US16069915

申请日：2016-03-14

Applicant: Mitsubishi Electric Corporation

Inventor： Satoru AKUTSU ,  Yoshihito ASAO

IPC: H02P29/66 ,  B62D5/04

Abstract: To provide a three phase duplexing motor for electric power steering apparatus that can manage increase in a supply current and can manage influence on motor, when increasing a supply current to the three phase windings of the normal set. An three phase duplexing motor for electric power steering apparatus sets 0 to a supply current to three phase winding of abnormality occurrence set, and increases a supply current to three phase windings of the normal set, with a preliminarily set increase upper limit current value as an upper limit.