公开(公告)号：US20120074884A1

公开(公告)日：2012-03-29

申请号：US13243529

申请日：2011-09-23

Applicant: Hoshihito OKADA ,  Yoshihiko Maeda ,  Hiroshi Takao ,  Yoichi Enomoto

Inventor： Hoshihito OKADA ,  Yoshihiko Maeda ,  Hiroshi Takao ,  Yoichi Enomoto

IPC: H02H7/122

CPC classification number: H02M7/5387 ,  B60L3/003 ,  B60L3/04 ,  B60L50/51 ,  B60L50/66 ,  B60L2200/12 ,  B60L2240/12 ,  B60L2240/525 ,  B60L2250/16 ,  H02M2001/327 ,  Y02T10/7005 ,  Y02T10/705

Abstract: An inverter device of the present invention includes: an inverter circuit portion that has a plurality of switching elements and that converts direct-current power into alternating-current power; and a temperature detection sensor that detects the temperature of the switching elements, in which, in the inverter circuit portion, a plurality of the switching elements on each of an upper side arm and a lower side arm corresponding to each phase are connected in parallel, and the temperature detection sensor is arranged in an intermediate position between the switching elements connected in parallel.

Abstract translation: 本发明的逆变器装置包括：具有多个开关元件并将直流电力转换成交流电力的逆变器电路部分; 以及检测所述开关元件的温度的温度检测传感器，其中，在逆变器电路部分中并联连接有与各相对应的上侧臂和下侧臂中的多个开关元件， 并且温度检测传感器被布置在并联连接的开关元件之间的中间位置。

公开(公告)号：US20110102933A1

公开(公告)日：2011-05-05

申请号：US12558435

申请日：2009-09-11

Applicant: Masayuki Kurita ,  Kenji Kuroki ,  Kenichi Kuramoto ,  Yoshihiko Maeda

Inventor： Masayuki Kurita ,  Kenji Kuroki ,  Kenichi Kuramoto ,  Yoshihiko Maeda

IPC: G11B27/36 ,  G11B21/02

CPC classification number: G11B5/6029 ,  G11B5/6064

Abstract: A method for measuring a change of a clearance between a head and a disk. The method includes reading a preliminarily written data string for clearance measurement on a disk to obtain a first measured value corresponding to a clearance, and writing a new data string for deterioration check onto the disk and reading the data string for deterioration check to obtain a second measured value corresponding to the clearance. The method also includes determining a deterioration of the data string for clearance measurement from a difference between the first measured value and the second measured value, measuring a clearance change using the data string for clearance measurement by a normal operation if the determination is that the data string for clearance measurement has not deteriorated, and measuring a clearance change by an operation different operation if the determination is that the data string for clearance measurement has deteriorated.

Abstract translation: 一种用于测量磁头和磁盘之间的间隙变化的方法。 该方法包括在盘上读取用于间隙测量的预先写入的数据串，以获得与间隙相对应的第一测量值，并将用于劣化检查的新数据串写入盘并读取用于劣化检查的数据串，以获得第二 测量值对应于间隙。 该方法还包括从第一测量值和第二测量值之间的差异确定用于间隙测量的数据串的劣化，如果确定数据是通过正常操作，则使用用于间隙测量的数据串来测量间隙变化 用于间隙测量的琴弦没有劣化，并且如果确定用于间隙测量的数据串已经劣化，则通过操作不同的操作来测量间隙变化。

公开(公告)号：US20090296260A1

公开(公告)日：2009-12-03

申请号：US12156092

申请日：2008-05-28

Applicant: Yoshihiko Maeda ,  Takao Matsui ,  Nobuhiro Kuwamura ,  Kenichi Kuramoto ,  Akihiro Sera

Inventor： Yoshihiko Maeda ,  Takao Matsui ,  Nobuhiro Kuwamura ,  Kenichi Kuramoto ,  Akihiro Sera

IPC: G11B21/02

CPC classification number: G11B5/6064 ,  G11B5/607

Abstract: Embodiments of the present invention help to detect contact between a head and a magnetic disk more accurately in specifying a heater power value for adjusting a clearance between a head element portion and the disk. According to one embodiment, a hard disk controller/multiprocessing unit (HDC/MPU) measures amplitudes of read signals in a user data field DATA. A hard disk drive (HDD) fills a gap between servo data with single data sector. The HDC/MPU measures the amplitudes of read signals in each data sector at different heater power values. It determines the heater power value at which contact occurs from the measured values.

Abstract translation: 本发明的实施例有助于在确定用于调节头元件部分和盘之间的间隙的加热器功率值时更准确地检测磁头和磁盘之间的接触。 根据一个实施例，硬盘控制器/多处理单元（HDC / MPU）测量用户数据字段DATA中的读取信号的幅度。 硬盘驱动器（HDD）填充伺服数据与单个数据扇区之间的间隙。 HDC / MPU以不同的加热器功率值测量每个数据扇区中读取信号的幅度。 它从测量值确定接触发生的加热器功率值。

公开(公告)号：US07609593B2

公开(公告)日：2009-10-27

申请号：US10855655

申请日：2004-05-27

Applicant: Kenji Urushihara ,  Yuji Yamaguchi ,  Yoshihiko Maeda ,  Hiroto Nishida

Inventor： Kenji Urushihara ,  Yuji Yamaguchi ,  Yoshihiko Maeda ,  Hiroto Nishida

IPC: G11B7/085

CPC classification number: G11B19/124 ,  G11B17/0404 ,  G11B17/0515

Abstract: The present invention provides a disc drive apparatus capable of identifying a disc (12 cm) having a small data area (8 cm) in central as same as an ordinary 12 cm disc. The apparatus having a light receiving unit 105b and a push switch 106b. The unit 105b is arranged in a position where the unit 105b detects the disc having the small data area in central when the switch 106b detects the same, and where the unit 105b does not detect a disc (12 cm) having a hole (8 cm) in central when the 106b detects the same. The apparatus also has an disc identifier for identifying type of the disc based on the detected results of the light receiving units and/or the push switches.

Abstract translation: 本发明提供一种能够识别与普通12cm盘相同的具有小数据区域（8cm）的盘（12cm）的盘驱动装置。 该装置具有光接收单元105b和按压开关106b。 当开关106b检测到该单元105b被布置在单元105b检测到具有小数据区域的盘的位置，并且在单元105b未检测到具有孔的盘（12cm）（8cm ）在106b检测到相同。 该装置还具有用于基于光接收单元和/或按钮开关的检测结果识别盘的类型的盘标识符。

公开(公告)号：US09236827B2

公开(公告)日：2016-01-12

申请号：US14131651

申请日：2012-05-15

Applicant: Yoichi Enomoto ,  Hiroshi Takao ,  Yoshihiko Maeda ,  Hoshihito Okada

Inventor： Yoichi Enomoto ,  Hiroshi Takao ,  Yoshihiko Maeda ,  Hoshihito Okada

IPC: G01N27/04 ,  H02P27/06 ,  B60L3/00 ,  G01R31/40 ,  H02P29/02 ,  B60L9/18 ,  G01R31/34 ,  G01R31/02 ,  G01R27/02

CPC classification number: H02P27/06 ,  B60L3/0069 ,  B60L9/18 ,  G01R27/025 ,  G01R31/025 ,  G01R31/34 ,  G01R31/343 ,  G01R31/40 ,  H02P29/0241 ,  Y02T10/642

Abstract: A motor drive circuit comprises: a DC power supply; power supply lines; an inverter which has upper arm switch elements and lower arm switch elements; and a detection unit for detecting, based on a power state on the previous stage side of the inverter, the insulation resistances of the motor drive circuit and the motor. The detection unit performs a first detection operation for detecting the insulation resistances by using the output of the DC power supply while the upper arm switch elements and the lower arm switch elements are all turned off and a second detection operation for detecting the insulation resistances by using the output of the DC power supply while the elements of one of the upper arm switch elements and the lower arm switch elements are all turned off and at least one of the elements of the other one is turned on.

Abstract translation: 电动机驱动电路包括：直流电源; 电源线; 具有上臂开关元件和下臂开关元件的逆变器; 以及检测单元，用于基于反相器的前一侧的功率状态来检测电动机驱动电路和电动机的绝缘电阻。 检测单元通过使用直流电源的输出来检测绝缘电阻的第一检测操作，同时上臂开关元件和下臂开关元件全部关闭，以及通过使用第二检测操作来检测绝缘电阻 当上臂开关元件和下臂开关元件之一的元件全部关闭并且另一个的元件中的至少一个被接通时，直流电源的输出。

公开(公告)号：US20110294948A1

公开(公告)日：2011-12-01

申请号：US13201387

申请日：2010-02-09

Applicant: Yoshifumi Urakawa ,  Shigeru Yamaki ,  Nobuaki Ishii ,  Yoshihiko Maeda

Inventor： Yoshifumi Urakawa ,  Shigeru Yamaki ,  Nobuaki Ishii ,  Yoshihiko Maeda

IPC: C09D147/00 ,  C08F136/20 ,  C08F236/20 ,  C07C69/602

CPC classification number: C07C69/76 ,  C08F20/30 ,  C09D4/00 ,  C09D5/18 ,  C09D175/16 ,  G02B1/04 ,  C08L33/10

Abstract: Disclosed is a (meth)acrylate compound which can provide a cured article having a high refractive index and excellent transparency and heat resistance, and which has superior handling characteristics; further disclosed are a curable composition containing the (meth)acrylate compound, and a cured article thereof. The (meth)acrylate compound contains an aromatic group represented by the following general formula (1), the curable composition comprising the aromatic-group containing (meth)acrylate compound, and the cured article thereof. (In the formula, R1, R2, R3 and R4 are each independently a hydrogen atom or a methyl group; X is an organic group having an aromatic group and 6 to 30 carbon atoms; and a and b are each independently an integer of 0 to 3.)

Abstract translation: 公开了一种（甲基）丙烯酸酯化合物，其可以提供具有高折射率和优异的透明性和耐热性的固化物，并且具有优异的处理特性; 进一步公开了含有（甲基）丙烯酸酯化合物的固化性组合物及其固化物。 （甲基）丙烯酸酯化合物包含由以下通式（1）表示的芳族基团，所述含有芳香族基团的（甲基）丙烯酸酯化合物的固化性组合物及其固化物。 （式中，R 1，R 2，R 3，R 4各自独立地为氢原子或甲基，X为具有芳基和碳原子数为6〜30的有机基团，a和b各自独立地为0以下的整数） 至3.）

公开(公告)号：US20090141391A1

公开(公告)日：2009-06-04

申请号：US12290533

申请日：2008-10-30

Applicant: Kenichi Kuramoto ,  Masayuki Kurita ,  Yoshihiko Maeda ,  Hidetsugu Tanaka ,  Akihiro Sera ,  Katsumasa Yamazaki

Inventor： Kenichi Kuramoto ,  Masayuki Kurita ,  Yoshihiko Maeda ,  Hidetsugu Tanaka ,  Akihiro Sera ,  Katsumasa Yamazaki

IPC: G11B21/02

CPC classification number: G11B5/581 ,  G11B5/583

Abstract: Embodiments of the present invention help to precisely control the clearance between a head and disk for the pressure without using a barometric sensor. In an embodiment of the present invention, an HDD determines a clearance from variations in operational parameters, and further determines a variation in pressure by deducting the clearance variation caused by a variation in temperature from the clearance. When the HDD controls the clearance in accordance with the pressure change, the HDD checks for head-disk contact. The accuracy and reliability in pressure measurement (clearance measurement) using operational parameters are not high. Therefore, confirming the pressure measurement by the presence or absence of head-disk contact eliminates head-disk contact in the following read/write operation to attain a securer margin for the clearance.

Abstract translation: 本发明的实施例有助于在不使用气压传感器的情况下精确地控制压头与盘之间的压力间隙。 在本发明的一个实施例中，HDD确定与操作参数变化之间的间隙，并且通过减去由间隙的温度变化引起的间隙变化来进一步确定压力变化。 当HDD根据压力变化控制间隙时，HDD检查头盘接触。 使用操作参数的压力测量（间隙测量）的精度和可靠性不高。 因此，通过头盘接触的存在或不存在来确认压力测量可以在随后的读/写操作中消除头盘接触，以获得间隙的安全裕度。

公开(公告)号：US08259406B2

公开(公告)日：2012-09-04

申请号：US12964543

申请日：2010-12-09

Applicant: Michiya Kazusawa ,  Masayuki Kurita ,  Kenji Kuroki ,  Yoshihiko Maeda

Inventor： Michiya Kazusawa ,  Masayuki Kurita ,  Kenji Kuroki ,  Yoshihiko Maeda

IPC: G11B5/09

CPC classification number: G11B5/59616 ,  G11B5/3136 ,  G11B5/40 ,  G11B5/6064

Abstract: A disk drive including a sensor element that senses contact between a head slider and a disk, a head integrated circuit (IC) comprising an amplification circuit section that amplifies a signal of the head slider, a controller IC comprising a controller that accesses a register of the head IC for controlling the head IC, and an identification section, within the head IC, that determines a contact frequency of the contact by the sensor element by using a timing control signal of the controller IC.

Abstract translation: 一种磁盘驱动器，包括感测磁头滑动器和磁盘盘之间的接触的传感器元件，包括放大电路部分的头部集成电路（IC），其放大磁头滑动器的信号;控制器IC，包括：控制器， 用于控制头IC的头IC，以及头IC内的识别部，其通过使用控制器IC的定时控制信号确定传感器元件的接触的接触频率。

公开(公告)号：US20110141603A1

公开(公告)日：2011-06-16

申请号：US12964543

申请日：2010-12-09

Applicant: Michiya KAZUSAWA ,  Masayuki Kurita ,  Kenji Kuroki ,  Yoshihiko Maeda

Inventor： Michiya KAZUSAWA ,  Masayuki Kurita ,  Kenji Kuroki ,  Yoshihiko Maeda

IPC: G11B5/09

CPC classification number: G11B5/59616 ,  G11B5/3136 ,  G11B5/40 ,  G11B5/6064

Abstract: A disk drive including a sensor element that senses contact between a head slider and a disk, a head integrated circuit (IC) comprising an amplification circuit section that amplifies a signal of the head slider, a controller IC comprising a controller that accesses a register of the head IC for controlling the head IC, and an identification section, within the head IC, that determines a contact frequency of the contact by the sensor element by using a timing control signal of the controller IC.

Abstract translation: 一种磁盘驱动器，包括感测磁头滑动器和磁盘盘之间的接触的传感器元件，包括放大电路部分的头部集成电路（IC），其放大磁头滑动器的信号;控制器IC，包括：控制器， 用于控制头IC的头IC，以及头IC内的识别部，其通过使用控制器IC的定时控制信号确定传感器元件的接触的接触频率。

公开(公告)号：US07852594B2

公开(公告)日：2010-12-14

申请号：US12156092

申请日：2008-05-28

Applicant: Yoshihiko Maeda ,  Takao Matsui ,  Nobuhiro Kuwamura ,  Kenichi Kuramoto ,  Akihiro Sera

Inventor： Yoshihiko Maeda ,  Takao Matsui ,  Nobuhiro Kuwamura ,  Kenichi Kuramoto ,  Akihiro Sera

IPC: G11B21/02

CPC classification number: G11B5/6064 ,  G11B5/607

Abstract: Embodiments of the present invention help to detect contact between a head and a magnetic disk more accurately in specifying a heater power value for adjusting a clearance between a head element portion and the disk. According to one embodiment, a hard disk controller/multiprocessing unit (HDC/MPU) measures amplitudes of read signals in a user data field DATA. A hard disk drive (HDD) fills a gap between servo data with single data sector. The HDC/MPU measures the amplitudes of read signals in each data sector at different heater power values. It determines the heater power value at which contact occurs from the measured values.

Abstract translation: 本发明的实施例有助于在确定用于调节头元件部分和盘之间的间隙的加热器功率值时更准确地检测磁头和磁盘之间的接触。 根据一个实施例，硬盘控制器/多处理单元（HDC / MPU）测量用户数据字段DATA中的读取信号的幅度。 硬盘驱动器（HDD）填充伺服数据与单个数据扇区之间的间隙。 HDC / MPU以不同的加热器功率值测量每个数据扇区中读取信号的幅度。 它从测量值确定接触发生的加热器功率值。