公开(公告)号：US20230198438A1

公开(公告)日：2023-06-22

申请号：US18073190

申请日：2022-12-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tetsuya MATSUYAMA ,  Yuya TANAKA

IPC: H02P21/30 ,  H02P21/05 ,  H02P21/14 ,  H02P21/20 ,  H02P21/22

CPC classification number: H02P21/30 ,  H02P21/05 ,  H02P21/20 ,  H02P21/22 ,  H02P21/141 ,  H02P2207/05

Abstract: A rotary machine control device includes: a magnetization characteristics determiner that determines a magnet phase of a magnet flux based on an estimated magnetic flux and a detection current, and determines a qm-axis magnetic flux of the estimated magnetic flux, a qm-axis current of the detection current, and a harmonic component of a magnet phase using a dm-qm coordinate system with a dm axis representing the magnet phase and a qm axis representing a phase shifted by 90 degrees from the magnet phase; a ripple compensation determiner that determines a ripple compensation phase using a ripple compensation torque obtained based on the qm-axis current and the harmonic component; a command phase determiner that determines a command phase based on the ripple compensation phase and a torque command; and a command magnetic flux generator that generates a command magnetic flux based on a command amplitude and the command phase.

公开(公告)号：US20220352837A1

公开(公告)日：2022-11-03

申请号：US17724308

申请日：2022-04-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuya TANAKA ,  Tetsuya MATSUYAMA

IPC: H02P23/14 ,  H02P25/022

Abstract: A rotary machine control device includes: a flux estimator that estimates a rotary machine flux; a command amplitude specifier that generates a command amplitude that is an amplitude of a command flux, by executing feedback control using a product of an estimated flux or an estimated magnet flux and a detected current; a command flux specifier that generates the command flux using the command amplitude; and a switcher that controls switching from a current synchronous operation to a flux control operation. When the switcher controls switching to the flux control operation, the flux estimator gives, to the feedback control, an amplitude of the estimated flux estimated before switching to the flux control operation, as an initial value of the command amplitude immediately after switching to the flux control operation.

公开(公告)号：US20170299267A1

公开(公告)日：2017-10-19

申请号：US15635486

申请日：2017-06-28

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Osamu KOSUDA ,  Osao KIDO ,  Atsuo OKAICHI ,  Takumi HIKICHI ,  Masaaki KONOTO ,  Noriyoshi NISHIYAMA ,  Yoshio TOMIGASHI ,  Tetsuya MATSUYAMA

IPC: F28B1/06 ,  F01K11/00 ,  F01K9/02 ,  F01K25/08 ,  F01K9/00

CPC classification number: F28B1/06 ,  F01K9/003 ,  F01K9/02 ,  F01K11/00 ,  F01K25/08

Abstract: An air cooling unit is an air cooling unit used in a Rankine cycle system and includes an expander and a condenser. The expander recovers energy from a working fluid by expanding the working fluid. The condenser cools the working fluid using air. The air cooling unit includes a heat-transfer reducer that reduces heat transfer between the expander and an air path.