公开(公告)号：US20200373866A1

公开(公告)日：2020-11-26

申请号：US16992218

申请日：2020-08-13

Applicant: Hitachi, Ltd.

Inventor： Takahiro SUZUKI ,  Shuhei NAGATA ,  Wataru HATSUSE ,  Masaki KOYAMA

IPC: H02P25/064 ,  F04B49/06 ,  F04B49/08 ,  F04B35/04 ,  H02P25/032

Abstract: Controllability of a linear motor or a compressor is improved in a linear motor system that includes: an armature having magnetic poles and winding wires; a mover having a permanent magnet; and a power conversion unit that outputs AC power to the winding wires, in which the mover and the armature are relatively movable, and the mover or the armature is connected to an elastic body. The linear motor system further includes: a position detection unit that detects and outputs the position of the mover with respect to the armature, a position estimation, or a current detection unit that outputs the value of current flowing through the winding wires; and a control unit that controls the output of the power conversion unit on the basis of the output of the position detection unit, the output of the position estimation unit, or the output of the current detection unit.

公开(公告)号：US20190170130A1

公开(公告)日：2019-06-06

申请号：US16304600

申请日：2017-04-11

Applicant: HITACHI, LTD.

Inventor： Takahiro SUZUKI ,  Shuhei NAGATA ,  Wataru HATSUSE ,  Masaki KOYAMA

IPC: F04B35/04 ,  F04B49/06 ,  H02K41/03 ,  H02P25/064

Abstract: Controllability of a linear motor or a compressor is improved. There is provided a linear motor system that includes: an armature having magnetic poles and winding wires; a mover having a permanent magnet; and a power conversion unit that outputs AC power to the winding wires, in which the mover and the armature are relatively movable, and the mover or the armature is connected to an elastic body. The linear motor system further includes: a position detection unit that detects and outputs the position of the mover with respect to the armature, a position estimation, or a current detection unit that outputs the value of current flowing through the winding wires; and a control unit that controls the output of the power conversion unit on the basis of the output of the position detection unit, the output of the position estimation unit, or the output of the current detection unit. In the case where a signal having a frequency substantially the same as the frequency of the AC power is applied to the output of the position detection unit, to the output of the position estimation unit, or to the output of the current detection unit, the control unit changes the frequency of the AC power, and in the case where a signal having a frequency substantially larger than the frequency of the AC power is applied, the control unit keeps the frequency of the AC power substantially the same.

公开(公告)号：US20160149477A1

公开(公告)日：2016-05-26

申请号：US14936997

申请日：2015-11-10

Applicant: Hitachi, Ltd.

Inventor： Shuhei NAGATA ,  Masaki KOYAMA ,  Takahiro SUZUKI ,  Yasuaki AOYAMA

IPC: H02K41/02 ,  F04B35/04 ,  F04B39/12 ,  H02K3/28

CPC classification number: F04B39/122 ,  F04B35/045 ,  H02K1/14 ,  H02K41/031

Abstract: A linear motor includes an armature with two magnetic poles arranged in the Z direction, and winding wires wound around the two magnetic poles, respectively, and a mover with a permanent magnet, which moves relative to the armature in the Z direction. A first auxiliary magnetic pole is disposed between the two magnetic poles, and a bridge is disposed between the first auxiliary magnetic pole and the magnetic pole. The two winding wires are electrically coupled.

Abstract translation: 线性电动机包括具有沿Z方向排列的两个磁极的电枢和分别缠绕在两个磁极上的绕组线圈和具有永久磁铁的移动器，其相对于电枢沿Z方向移动。 第一辅助磁极设置在两个磁极之间，桥被布置在第一辅助磁极和磁极之间。 两条绕组电线电耦合。

公开(公告)号：US20180003224A1

公开(公告)日：2018-01-04

申请号：US15541863

申请日：2015-01-07

Applicant: Hitachi, Ltd.

Inventor： Takahiro SUZUKI ,  Yasuaki AOYAMA ,  Shuhei NAGATA ,  Masaki KOYAMA

IPC: F16C32/04 ,  H02K11/33 ,  H02K11/21 ,  F04B35/04 ,  H02K33/12 ,  H02K7/09

CPC classification number: F16C32/044 ,  F04B35/04 ,  F04B35/045 ,  F16C2380/26 ,  H02K7/09 ,  H02K11/21 ,  H02K11/33 ,  H02K33/12 ,  H02K41/031 ,  H02P25/06

Abstract: To provide a motor system that can control the position of a control object in multiple directions while suppressing the number of required switching elements. A motor system includes: a power conversion device including first, second, and third up-down arms each including two switching elements connected in series; a control object; and a first load including a magnetic pole tooth facing the control object, and a winding wound around the magnetic pole tooth. The motor system includes a second load including two magnetic pole teeth facing each other in a second direction with the control object therebetween, and a winding wound around one or both of the magnetic pole teeth. The power conversion device provides a force with respect to a first direction to the control object through an output to the first load, and provides a force with respect to the second direction to the control object through an output to the second load.

公开(公告)号：US20170054355A1

公开(公告)日：2017-02-23

申请号：US15305935

申请日：2015-03-02

Applicant: Hitachi, Ltd.

Inventor： Yasuaki AOYAMA ,  Masaki KOYAMA ,  Takahiro SUZUKI ,  Shuhei NAGATA

IPC: H02K41/02

Abstract: Provided are: a linear motor that has increased compactness and that can effectively use magnetic flux; and an apparatus provided with the linear motor. The linear motor has a top mobile element and a bottom mobile element provided below the top mobile element, and an armature has: a top first set of magnetic pole teeth comprising two magnetic pole teeth opposing each other in the vertical direction across a space through which the top mobile element can move in a reciprocating manner; and a bottom first set of magnetic pole teeth comprising two magnetic pole teeth opposing each other in the vertical direction across a space through which the bottom mobile element can move in a reciprocating manner. The linear motor is characterized by the armature being able to be split into an inner component, which has the bottom magnetic pole tooth of the top first set of magnetic pole teeth and the top magnetic pole tooth of the bottom first set of magnetic pole teeth, and a component having approximately the same shape as that of the inner component or outer component and having the bottom magnetic pole tooth of the bottom first set of magnetic pole teeth.

Abstract translation: 提供：具有增加的紧凑性并且可以有效地使用磁通量的线性电动机; 以及设置有线性电动机的装置。 线性电动机具有顶部移动元件和设置在顶部移动元件下方的底部移动元件，并且电枢具有：顶部第一组磁极齿，其包括在垂直方向上彼此相对的两个磁极齿，跨过该空间， 顶部移动元件可以以往复方式移动; 以及底部的第一组磁极齿，其包括在垂直方向上彼此相对的两个磁极齿，跨越底部移动元件可以以往复方式移动的空间。 线性电动机的特征在于电枢能够被分成内部部件，其具有顶部第一组磁极齿的底部磁极齿和底部第一组磁极齿的顶部磁极齿， 以及具有与内部部件或外部部件大致相同形状并且具有底部第一组磁极齿的底部磁极齿的部件。