MULTIPHASE ELECTRIC MOTOR CONTROL DEVICE

    公开(公告)号:US20170141713A1

    公开(公告)日:2017-05-18

    申请号:US15352828

    申请日:2016-11-16

    申请人: Yoji Mori

    发明人: Yoji Mori

    IPC分类号: H02P23/14 H02P27/08 H02P6/14

    摘要: A multiphase electric motor control device includes: a bridge circuit including phase circuits each including a high potential side switching element, a low potential side switching element, and a current detector, a PWM control unit that outputs PWM signals to the switching elements; a control unit that acquires phase current values at a timing synchronized with a triangle wave; and a current value estimation unit that estimates a phase current value of one phase based on phase current values of other phases. In a case where an ON time of the PWM signal output to the low potential side switching element of the one phase from the PWM control unit is shorter than a predetermined time, the control unit acquires the phase current values which are detected by shifting the timing by using the current detectors of at least the other phases.

    Solid-liquid separator with self-priming pump
    2.
    发明授权
    Solid-liquid separator with self-priming pump 有权
    具有自吸泵的固液分离器

    公开(公告)号:US08512565B2

    公开(公告)日:2013-08-20

    申请号:US12929442

    申请日:2011-01-25

    IPC分类号: B01D17/038 B01D21/26

    摘要: A solid-liquid separator prevents wear of a self-priming liquid pump connected to a cyclone mechanism and a solid-liquid mixture can be purified at low cost. The separator separates sludge in the liquid by a cyclone in a separation portion directly or indirectly connected to a suction of the upstream side of the pump. The separation portion has a first and second cyclones with the first cyclone disposed in said second cyclone coaxially. A tank disposed under the cyclones collects separated from the liquid.

    摘要翻译: 固液分离器防止连接到旋风机构的自吸液泵的磨损,并且可以以低成本净化固液混合物。 分离器通过直接或间接连接到泵的上游侧的吸力的分离部分中的旋风分离器分离液体中的污泥。 分离部分具有第一和第二旋风分离器,第一旋风分离器同轴地设置在所述第二旋风分离器中。 设置在旋风分离器下方的水箱与液体分离收集。

    Liquid pump and sealing mechanism
    3.
    发明授权
    Liquid pump and sealing mechanism 失效
    液体泵和密封机构

    公开(公告)号:US06887048B2

    公开(公告)日:2005-05-03

    申请号:US10379550

    申请日:2003-03-06

    IPC分类号: F04D29/12 F04D29/14 F04D29/70

    CPC分类号: F04D29/146

    摘要: A liquid pump has a sealing mechanism utilizing magnets. The sealing mechanism includes an annular rotating seal attached to the lower surface of a rotary base member fixed to the motor rotating shaft. Additionally, a flexible stationary seal is joined and separated with respect to the rotating seal. Movable magnets are disposed on the rotary base and are adapted to be displaced by centrifugal force due to a rotation of the rotary base member. A stationary magnet is disposed on the upper-surface side of a vertical sliding member to which the flexible stationary seal is fixed. The flexible stationary seal utilized has a cylindrical body. At the upper and lower end portions and the side surface portion, connecting portions to the stationary and movable members are formed. The middle portion has an elastic portion is formed on it.

    摘要翻译: 液体泵具有利用磁体的密封机构。 密封机构包括安装在固定于马达旋转轴的旋转基座部件的下表面的环状旋转密封件。 此外,柔性固定密封件相对于旋转密封件接合和分离。 可移动磁体设置在旋转基座上,并且由于旋转基座构件的旋转而被离心力移位。 固定磁铁设置在固定有柔性固定密封件的垂直滑动构件的上表面侧。 使用的柔性固定密封件具有圆柱体。 在上端部和下端部以及侧面部形成有与固定部件和可动部件的连接部。 中间部分形成有弹性部分。

    Recovery pump for recovering floating oil
    5.
    发明授权
    Recovery pump for recovering floating oil 失效
    用于回收浮油的回收泵

    公开(公告)号:US06312228B1

    公开(公告)日:2001-11-06

    申请号:US09478640

    申请日:2000-01-06

    IPC分类号: F04B5300

    摘要: A recovery pump capable of reliably recovering floating oil and/or floating matter such as scum or the like while being significantly down-sized. A pump casing is provided in a lower section thereof with a suction passage and a discharge passage. The suction passage is horizontally arranged and has a suction opening and the discharge passage is horizontally arranged below the suction passage. The passages are arranged so as to communicate with each other through a through-hole and the discharge passage is provided therewithin right below the through-hole with an impeller, which is driven by a drive motor located on an upper section of the pump casing. The suction opening is provided with a recovery section for recovering the floating oil and/or floating matter.

    摘要翻译: 能够可靠地回收漂浮油和/或漂浮物质(例如浮渣等)同时显着减小尺寸的回收泵。 泵壳体的下部设有吸入通道和排出通道。 吸入通道水平布置并具有吸入口,并且排出通道水平地布置在吸入通道下方。 通道布置成通过通孔彼此连通,并且排出通道在通孔的正下方设置有叶轮,该叶轮由位于泵壳体上部的驱动马达驱动。 吸入口设置有用于回收浮动油和/或浮动物质的回收部。

    Solenoid-operated valve for thermally insulated piping and attachment
construction therefor
    6.
    发明授权
    Solenoid-operated valve for thermally insulated piping and attachment construction therefor 失效
    用于隔热管道及其附件结构的电磁阀

    公开(公告)号:US5623960A

    公开(公告)日:1997-04-29

    申请号:US436422

    申请日:1995-05-23

    摘要: The present invention relates to a solenoid-operated valve for a thermally insulated piping having a thermally insulated outer periphery suitable for transporting low-temperature fluid, high-temperature fluid or the like and relates also to an attachment construction for the valve.Conventionally, with this type of solenoid-operated valve for a thermally insulated piping, since it is necessary to to increase a magnetic flux density of the solenoid coil by increasing the number of turns of the oil or the electric current to be applied thereto, there has been the problem of high production costs and running costs.In the case of the solenoid-operated valve for a thermally insulated piping according to the present invention, inside a heat-insulating layer (6) surrounding flow passages (7, 20, 21, 26, 33) in the form of a pipe, there is provided a fixed core (23) constituting a magnetic circuit between a solenoid coil (17) and a movable coil (18). Then, magnetic resistance between the solenoid coil and the movable core may be reduced, without entailing enlargement of the movable core and the production costs and the running costs may be reduced.

    摘要翻译: PCT No.PCT / JP93 / 01839 Sec。 371日期:1995年5月23日 102(e)日期1995年5月23日PCT提交1993年12月17日PCT公布。 出版物WO94 / 15127 日期:1994年7月7日本发明涉及一种用于隔热管道的电磁阀,其具有适用于输送低温流体,高温流体等的绝热外周边,还涉及用于 阀。 通常,对于这种用于隔热管道的电磁阀,由于需要通过增加油的匝数或施加到其上的电流来增加螺线管线圈的磁通密度,所以 一直是高生产成本和运行成本的问题。 在根据本发明的用于绝热管道的电磁阀的情况下,围绕管道形式的流动通道(7,20,21,26,33)的隔热层(6)内部, 提供构成螺线管线圈(17)和可动线圈(18)之间的磁路的固定铁心(23)。 于是,可以减小螺线管线圈和可动铁芯之间的磁阻,而不需要增大可动铁芯,并且可以降低生产成本并降低运行成本。

    Air-conditioning apparatus
    8.
    发明授权
    Air-conditioning apparatus 失效
    空调机

    公开(公告)号:US4876952A

    公开(公告)日:1989-10-31

    申请号:US309102

    申请日:1989-02-10

    IPC分类号: F24F13/06 F24F13/08 F24F11/04

    摘要: An air-conditioning apparatus for adjusting the direction and quantity of air comprises a duct device forming an air passage passing through the duct device, and an airflow adjusting device. The airflow adjusting device is made from a single thin plate and fitted to the duct device across the air passage to adjust a flow of air. Slits of predetermined patterns are formed on the airflow adjusting device to define a plurality of vanes which are integral to the airflow adjusting device. Functions for adjusting the direction and quantity of air are basically realized only with the single thin plate so that the material and manufacturing costs of the apparatus will be reduced, the transportation, installation and maintenance of the apparatus simplified, and angles of the vanes adjusted separately and freely.

    摘要翻译: 用于调节空气的方向和数量的空气调节装置包括形成通过管道装置的空气通道的管道装置和气流调节装置。 气流调节装置由单个薄板制成,并且穿过空气通道装配到管道装置上以调节空气流。 在气流调节装置上形成预定图案的狭缝以限定与气流调节装置成一体的多个叶片。 调整空气的方向和数量的功能基本上只用单个薄板实现,从而减少了设备的材料和制造成本,简化了设备的运输,安装和维护,并分别调整了叶片的角度 并自由。

    Polyphase electric motor control device

    公开(公告)号:US10454396B2

    公开(公告)日:2019-10-22

    申请号:US15951711

    申请日:2018-04-12

    IPC分类号: H02P6/15 H02P27/08

    摘要: A polyphase electric motor control device stores a first threshold as a duty cycle at which noise caused by a high potential-side switching element starts to overlap a first measurement period, and a second threshold as a duty cycle at which time when a low potential-side switching element is switched from on to off is after an end of a second measurement period, makes a first judgment for comparing a maximum target duty cycle with the first threshold, and a second judgment for comparing a second greatest target duty cycle with the second threshold, measures a current in the first measurement period when the maximum target duty cycle is smaller than the first threshold, and measures a current in the second measurement period when the maximum target duty cycle is greater than the first threshold and the second greatest target duty cycle is smaller than the second threshold.

    MAGNETIC POLE DIRECTION DETECTION DEVICE
    10.
    发明申请

    公开(公告)号:US20190158007A1

    公开(公告)日:2019-05-23

    申请号:US16196328

    申请日:2018-11-20

    摘要: In a magnetic pole direction detection device, a detecting target magnet is attached to a tip of a rotating shaft of the rotor. A magnetic detection unit outputs a detection signal which changes according to a change in a magnetic field. A magnetic pole direction calculation unit calculates a magnetic pole direction of a rotor based on the detection signal. A current detection unit detects a current flowing through each multiphase coil. A rotating magnetic field vector calculation unit calculates a vector of a rotating magnetic field based on magnitude of the detected current. A direction correction amount calculation unit calculates a direction correction amount based on a direction and magnitude of the rotating magnetic field calculated by the rotating magnetic field vector calculation unit. A magnetic pole direction correction unit corrects the calculated magnetic pole direction by using the calculated direction correction amount calculated.