Title:
LINEAR MOTOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/008907
Kind Code:
A1
Abstract:
Provided is a linear motor system that can highly efficiently drive a linear motor at a mechanical resonant frequency that incorporates a load, without the need for a sensor that detects induced voltage that changes in accordance with fluctuations in the load. A linear motor system 100 that comprises a linear motor 104 that has a winding 8 to which at least alternating current voltage is applied and a mobile element 6 to which an elastic body 23 is connected. The resonant frequency of the mobile element 6 is dependent on the elastic body 23 and the load of the linear motor 104. The linear motor system 100 also has a linear motor drive device 102 that detects a fundamental wave amplitude for the current flowing in the winding 8 and increases the phase difference between the alternating current voltage Vm and the current Im flowing in the winding 8 in accordance with increases in the fundamental wave amplitude.
Inventors:
SUZUKI TAKAHIRO (JP)
HATSUSE WATARU (JP)
KOYAMA MASAKI (JP)
KOBAYASHI KAN (JP)
HATSUSE WATARU (JP)
KOYAMA MASAKI (JP)
KOBAYASHI KAN (JP)
Application Number:
PCT/JP2018/018667
Publication Date:
January 10, 2019
Filing Date:
May 15, 2018
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02P25/064; F04B27/02; F04B35/00
Foreign References:
| JPH09112438A | 1997-05-02 | |||
| JP2014527593A | 2014-10-16 | |||
| JPH11351143A | 1999-12-21 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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