Title:
SEMICONDUCTOR MOTOR WITH AIR CORE COIL AS POSITION DETECTOR
Document Type and Number:
Japanese Patent JPS5836158
Kind Code:
A
Abstract:
PURPOSE:To facilitate the positioning of drive coil and position detecting air core coil by forming a position detecting band of a conductive nonmagnetic material which has teeth of number half of the number of poles on the magnetizing surface of a field magnet and integrally winding both the coils. CONSTITUTION:A bearing 2 is press-fitted into an upper housing 4, and a rotational shaft 1 is rotatably supported at the bearing 2. A magnet holder 9 and an annular field magnet 7 are integrally secured to the shaft 1. The first magnetic yoke is secured to the opposite side to the magnetizing surface of the magnet 7, and a position detecting band 8 made of conductive nonmagnetic material which has teeth of the number of half of the number of poles is secured to the magnetizing surface. A lower housing 5 is engaged with the upper housing 4, supports at the center the shaft 1, and a drive coil 11a and a position detecting air core coil 11b are integrally wound. In this manner, the positioning of both the coils can be very accurately performed, and the size can be effectively reduced.
Inventors:
BAN ITSUKI
SHIRAKI MANABU
OKADA HIDEO
EGAMI KAZUHITO
SHIRAKI MANABU
OKADA HIDEO
EGAMI KAZUHITO
Application Number:
JP13218981A
Publication Date:
March 03, 1983
Filing Date:
August 25, 1981
Export Citation:
Assignee:
SEKOH GIKEN KK
International Classes:
H02K29/00; H02K29/12; (IPC1-7): H02K29/00
Domestic Patent References:
| JPS5420315A | 1979-02-15 | |||
| JPS54113018A | 1979-09-04 |