公开(公告)号：US20230296457A1

公开(公告)日：2023-09-21

申请号：US18322943

申请日：2023-05-24

申请人： MINEBEA MITSUMI Inc.

发明人： Shinya TODA ,  Eiji MISAIZU ,  Kosuke KITAHARA

IPC分类号： G01L1/22 ,  H05K1/02 ,  H05K1/03 ,  H05K1/16

CPC分类号： G01L1/2287 ,  H05K1/0296 ,  H05K1/0393 ,  H05K1/167 ,  H05K2201/10151

摘要： A strain gauge includes a flexible substrate, a resistor, and electrodes. Each electrode includes first patterns juxtaposed at predetermined intervals and electrically connected to each other. Second patterns of which longitudinal directions are toward a same direction as a longitudinal direction of each of the first patterns are disposed between opposing electrodes. The second patterns are electrically floating dummy patterns. The second patterns of which the longitudinal directions are toward a same direction as the longitudinal direction of each first pattern are disposed, the second patterns being interposed between first patterns opposite each other that are among given first patterns that constitute one of the electrodes and given first patterns that constitute another electrode. The plurality of second patterns are interposed between first patterns opposite each other that are among given first patterns that constitute one of the electrodes and given first patterns that constitute another electrode.

公开(公告)号：US11757394B2

公开(公告)日：2023-09-12

申请号：US17627746

申请日：2020-07-06

申请人： MINEBEA MITSUMI Inc.

发明人： Takashi Oba ,  Reiji Yamasaki

IPC分类号： H02P27/08 ,  H02M1/00 ,  H02M7/5387

CPC分类号： H02P27/08 ,  H02M1/0009 ,  H02M7/53871

摘要： The present application provides a motor control device capable of suppressing noise. A motor control device includes a control unit configured to generate a PWM signal corresponding to each phase (U, V, W) of a motor, an inverter circuit configured to drive the motor, based on the PWM signal, and a current detector connected to a direct-current line of the inverter circuit in series. The control unit includes a current detection unit, a duty cycle setting unit configured to set a duty cycle, based on a detection result of the current detection unit, and a PWM signal generation unit configured to generate the PWM signal. The PWM signal of each phase has a signal level changing at a timing according to the set duty cycle in a first period in one cycle of the PWM signal and has a signal level changing at a different fixed timing in the second period in one cycle of the PWM signal. The current detection unit detects a current (Sd) of the current detector in the second period.

公开(公告)号：US11747225B2

公开(公告)日：2023-09-05

申请号：US17043898

申请日：2019-04-01

申请人： MINEBEA MITSUMI Inc.

发明人： Toshiaki Asakawa ,  Shinichi Niwa ,  Shintaro Takata ,  Shinya Toda

IPC分类号： G01L1/22

CPC分类号： G01L1/2287

摘要： A strain gauge includes a flexible substrate, and a resistor formed of material containing at least one from among chromium and nickel, on or above the substrate. The resistor includes a first layer that is a lowermost layer; and a second layer that is a surface layer laminated on or above the first layer. The second layer is a layer having a higher density than the first layer. The first layer has a first surface provided on a side where the flexible resin substrate is situated, the functional layer being laminated on the first surface. The first layer has a second surface on which the second layer is laminated.

公开(公告)号：US11719661B2

公开(公告)日：2023-08-08

申请号：US17652742

申请日：2022-02-28

申请人： MINEBEA MITSUMI Inc.

发明人： Fumihiro Inoue ,  Taketomo Nakane

IPC分类号： G01N27/00 ,  G01N27/22

CPC分类号： G01N27/223 ,  G01N27/226 ,  G01N27/228

摘要： A sensor includes a substrate, a reference electrode provided above the substrate, a lower electrode provided above the reference electrode via an insulating film, and an upper electrode provided above the lower electrode via a physical quantity detecting film. The upper electrode and the lower electrode form a parallel-plate-type detection capacitor, and the lower electrode and the reference electrode form a parallel-plate-type reference capacitor.

公开(公告)号：US11716045B2

公开(公告)日：2023-08-01

申请号：US17441436

申请日：2020-03-23

申请人： MINEBEA MITSUMI Inc.

发明人： Takashi Oba

IPC分类号： H02P1/30 ,  H02P1/52 ,  H02P3/00 ,  H02P27/12 ,  H02P21/22

CPC分类号： H02P27/12 ,  H02P21/22

摘要： A motor controller 100-1 includes an inverter, a current detection unit, a current detector, and a PWM signal generator. Upon occurrence of a condition in which a first energization time period, which has an energization width in which a phase current for a first phase is detectable by the current detector, and a second energization time period, which has an energization width in which a phase current for a second phase is difficult to be detected by the current detector, are present, the PWM signal generator extracts a portion of a zero vector period for a first PWM signal, a second PWM signal, and a third PWM signal, to assign an energization width corresponding to the extracted zero vector period, to a period, other than the zero vector period, for a given PWM signal among the first PWM signal, the second PWM signal, and the third PWM signal, so that the second energization time period is adjusted to have an energization width in which the phase current for the second phase is detectable by the current detector.

公开(公告)号：US11702730B2

公开(公告)日：2023-07-18

申请号：US17929830

申请日：2022-09-06

申请人： MINEBEA MITSUMI Inc.

发明人： Toshiaki Asakawa ,  Yuta Aizawa ,  Shinya Toda ,  Shintaro Takata ,  Shinichi Niwa

IPC分类号： C23C14/20 ,  C23C14/00 ,  C23C14/06 ,  C23C14/08 ,  C23C14/10 ,  G01B7/16 ,  G01L1/22

CPC分类号： C23C14/20 ,  C23C14/0063 ,  C23C14/0652 ,  C23C14/08 ,  C23C14/10 ,  G01B7/16 ,  G01L1/22 ,  G01L1/2281

摘要： A strain gauge includes a flexible substrate and a functional layer formed of a metal, an alloy, or a metal compound, the functional layer being directly on one surface of the substrate. The strain gauge includes a resistor formed of a film that includes Cr, CrN, and Cr2N and that is formed with α-Cr as a main component. The functional layer includes a function of promoting crystal growth of α-Cr and forming an α-Cr based film.

公开(公告)号：US20230219117A1

公开(公告)日：2023-07-13

申请号：US18185619

申请日：2023-03-17

申请人： MINEBEA MITSUMI Inc.

发明人： Mikio UMEHARA

IPC分类号： B06B1/04 ,  G01M7/02 ,  H02K1/34 ,  H02K33/16

CPC分类号： B06B1/045 ,  G01M7/027 ,  H02K1/34 ,  H02K33/16

摘要： A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.

公开(公告)号：US11699938B2

公开(公告)日：2023-07-11

申请号：US17388288

申请日：2021-07-29

申请人： Minebea Mitsumi Inc.

发明人： Helmut Schneider ,  Fabian Sekinger

IPC分类号： H02K7/12 ,  H02K11/215 ,  H02K7/116

CPC分类号： H02K7/12 ,  H02K7/116 ,  H02K11/215 ,  H02K2211/03

摘要： The invention relates to a guiding element for use in an electric motor, an electric motor, and a method of installing a rotatable element in an electric motor. The guiding element comprises a guide for a rotatable element of the electric motor. The guide is adapted to radially guide the rotatable element relative to a rotary axis. The guiding element also comprises a centering device adapted to align and/or fix a sensor holding device in the electric motor relative to the guiding element. Moreover, the guiding element comprises a fixing device adapted to fix the guiding element to a housing of the electric motor.

公开(公告)号：US11695268B2

公开(公告)日：2023-07-04

申请号：US17379158

申请日：2021-07-19

申请人： MINEBEA MITSUMI Inc.

发明人： Hiroyuki Kato ,  Toshikazu Koshiba

IPC分类号： H02P27/06 ,  H02H7/08 ,  H02H7/122 ,  H02H9/02 ,  H02M7/5387 ,  H02M3/07 ,  H02M1/32

CPC分类号： H02H7/0833 ,  H02H7/122 ,  H02H9/025 ,  H02M1/32 ,  H02M3/07 ,  H02M7/5387 ,  H02P27/06

摘要： A protection function of an electronic device is realized with a lower cost. A load drive circuit 102 includes: transistors Qa and Qb for protection of an N-channel type connected between a power source terminal P1 and a power source end P7 for driving; an inverter circuit 14 that drives a load based on an input drive control signal Sd, the inverter circuit 14 being disposed between the power source end P7 for driving and a ground potential; and a booster unit 16 including a capacitor C1 having one terminal connected to an output end of the inverter circuit 14, the booster unit 16 generating, across another terminal of the capacitor C1, a voltage exceeding a power source voltage Vdc, and applying the voltage to control electrodes of the transistors Qa and Qb for protection.

公开(公告)号：US11662261B2

公开(公告)日：2023-05-30

申请号：US17644375

申请日：2021-12-15

申请人： MINEBEA MITSUMI Inc.

发明人： Shinya Yamaguchi

IPC分类号： G01L1/18 ,  G01L5/162

CPC分类号： G01L5/162 ,  G01L1/18

摘要： A sensor chip includes multiple sensing blocks each of which includes two or more T-patterned beam structures. Each T-patterned beam structure includes strain-detecting elements, at least one first detection beam, and a second detection beam extending from the first detection beam in a direction perpendicular to the first detection beam. Each T-patterned beam structure includes a connection portion formed by coupling ends of second detection beams in respective T-patterned structures, the connection portion including a force point portion. The sensor chip is configured to detect up to six axes relating to predetermined axial forces or moments around the predetermined axes, based on a change in an output of each of the strain-detecting elements, the output of each strain-detecting element changing in accordance with an input applied to a given force point portion.