Title:
LINEAR MOTOR, ELECTRIC SUSPENSION DEVICE COMPRISING SAME, AND VIBRATION DAMPING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/135893
Kind Code:
A1
Abstract:
In a linear motor, three coils are driven by applying a current in which the U phase, V phase, and W phase differ by 120°. Because a core is discontinuous at both ends in the movement direction of an armature, there is a difference in the inductance of the three coils and a difference in the voltage induced in the three coils during driving. A linear motor according to the present invention comprises: an armature which has teeth 2 and a coil 5 provided to the teeth 2; and a permanent magnet 10 which is provided to the outer peripheral side of the armature, wherein the armature and the permanent magnet 10 move relative to each other. The teeth of the linear motor according to the present invention are disposed along the movement direction such that the width in the movement direction differs.
Inventors:
AOYAMA YASUAKI (JP)
NEZU TAKASHI (JP)
YAMASHITA MIKIO (JP)
SUZUKI KENGO (JP)
RI TOMOYUKI (JP)
SAKAMOTO HIROTSUGU (JP)
HOSHI RYOSUKE (JP)
NEZU TAKASHI (JP)
YAMASHITA MIKIO (JP)
SUZUKI KENGO (JP)
RI TOMOYUKI (JP)
SAKAMOTO HIROTSUGU (JP)
HOSHI RYOSUKE (JP)
Application Number:
PCT/JP2022/039880
Publication Date:
July 20, 2023
Filing Date:
October 26, 2022
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H02K41/03; H02P25/064
Domestic Patent References:
| WO2021261059A1 | 2021-12-30 | |||
| WO2012056844A1 | 2012-05-03 |
Foreign References:
| JPH0638500A | 1994-02-10 | |||
| JP2011199936A | 2011-10-06 | |||
| JP2017041947A | 2017-02-23 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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