Title:
PERMANENT MAGNET TYPE MOTOR, POSITION ESTIMATION DEVICE, AND MOTOR DRIVE CONTROLLER
Document Type and Number:
Japanese Patent JP2017099081
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To increase saliency.SOLUTION: There are provided: a rotor having a rotor magnet where a plurality of N poles and S poles are magnetized on an outer periphery and a rotary shaft; and first and second respective ring-shaped pole tooth parts which are arranged opposite to the rotor magnet, in which a plurality of adjacent pole tooth pieces extending in an axial direction of the rotary shaft at prescribed intervals along a circumferential direction are approximated in the way that they are engaged with each other and base end sides of the respective tooth pieces facing each other are joined in a ring-shaped manner. A first groove part is formed on a first joint surface with the second ring-shaped pole tooth part in the first ring-shaped pole tooth part and a second groove part is formed on the second joint surface with the second ring-shaped pole tooth part.SELECTED DRAWING: Figure 6
Inventors:
HASHIMOTO TAKASHI
SUZUKI HARUYUKI
KOIKE TAKANAO
YOSHIMIZU HIDEKI
YAMAMOTO NORIHIRO
SUZUKI HARUYUKI
KOIKE TAKANAO
YOSHIMIZU HIDEKI
YAMAMOTO NORIHIRO
Application Number:
JP2015227019A
Publication Date:
June 01, 2017
Filing Date:
November 19, 2015
Export Citation:
Assignee:
RICOH CO LTD
International Classes:
H02K37/14; H02K21/16; H02P8/00
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito