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Title:
LINEAR MOTOR SYSTEM AND COMPRESSOR INCLUDING SAME
Document Type and Number:
WIPO Patent Application WO/2019/008909
Kind Code:
A1
Abstract:
Provided are: a linear motor system that can suppress the reactive current flowing in a winding and highly efficiently drive a linear motor, without positioning, inside the linear motor, a sensor that detects the thrust of the linear motor; and a compressor that includes the linear motor system. A linear motor system 100 that comprises at least: a linear motor 104 that has an armature 9 that has a magnetic body on which a winding 8 has been wound, a field magnetic element 6 that includes a permanent magnet, and an elastic body 23 that is connected to the armature 9 or the field magnetic element 6; and a control unit 102 that applies voltage to the winding. The relative positioning of the field magnetic element 6 and the armature 9 fluctuates in response to the deformation of the elastic body 23, and, as a result, the field magnetic element 6 and the armature 9 move relative to each other in the axial direction in a reciprocal manner. On the basis of the rate of change in the magnetic flux that is generated by fluctuations in the relative positioning of the armature 9 and the field magnetic element 6, the control unit 102 decreases the absolute value of the voltage component applied to the winding 8 at relative positioning at which the rate of change in the magnetic flux is small.

Inventors:
SUZUKI Takahiro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
KOYAMA Masaki (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
HOTTA Kaito (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
HATSUSE Wataru (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2018/018678
Publication Date:
January 10, 2019
Filing Date:
May 15, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD. (3 Kanda Neribei-cho, Chiyoda-ku Tokyo, 22, 〒1010022, JP)
International Classes:
H02P25/064; F04B35/04; H02K41/03
Domestic Patent References:
WO2017006744A12017-01-12
WO2012056844A12012-05-03
WO2017051792A12017-03-30
Foreign References:
JP2001190088A2001-07-10
Attorney, Agent or Firm:
POLAIRE I.P.C. (13-11, Nihonbashikayabacho 2-chome Chuo-k, Tokyo 25, 〒1030025, JP)
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