Title:
PLURALITY OF MOTOR PRODUCTS, MOTOR, MOTOR GROUP, DRIVE DEVICE, AND MAGNET GROUP
Document Type and Number:
WIPO Patent Application WO/2020/071446
Kind Code:
A1
Abstract:
A plurality of identical commercially available motor products, wherein: there are at least 30 of the motor products; each of the motor products includes one or more magnets; each of the magnets has a void fraction of 7% or below; each of the magnets is a sintered magnet having a non-parallel-aligned region, and has a first main surface at which the peak value of the surface magnetic flux density is at its maximum; and when the surface magnetic flux density is measured along a measurement line on the first main surface of each of the magnets, the inter-magnet deviation variation P represented by the following formula:
Inter-magnet deviation variation P [%] = (σtotal[mT]/Atotal[mT]) × 100 is 4% or below.
Inventors:
FUJIKAWA KENICHI (JP)
TANAKA NOBUYUKI (JP)
OZEKI IZUMI (JP)
SAITO SHOICHIRO (JP)
KUME KATSUYA (JP)
TANAKA NOBUYUKI (JP)
OZEKI IZUMI (JP)
SAITO SHOICHIRO (JP)
KUME KATSUYA (JP)
Application Number:
PCT/JP2019/038981
Publication Date:
April 09, 2020
Filing Date:
October 02, 2019
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
H02K1/27; H01F7/02; H01F41/02
Domestic Patent References:
| WO2016152979A1 | 2016-09-29 | |||
| WO2018047211A1 | 2018-03-15 |
Foreign References:
| JP2017070100A | 2017-04-06 | |||
| JPH11178254A | 1999-07-02 | |||
| JP2004343822A | 2004-12-02 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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