SPINDLE MOTOR AND INFORMATION RECORDING/REPRODUCING DEVICE

WIPO Patent Application WO/2007/094113

A1

A spindle motor is provided with a shaft arranged along a rotating axis; a stator plate (16) for supporting the shaft; a rotating body rotatably inserted into the shaft; a rotor plate (19) which has an opposing plane (19a) opposing the stator plate and rotates with the rotating body; a plurality of rotor electrode sections (25) arranged on the opposing plane of the rotor plate at every prescribed angle (θ1); a plurality of stator electrode sections (26) arranged on the surface of the stator plate at every angle (θ2) which is narrower than a prescribed angle; a voltage applying means for rotating the rotor plate in a constant direction by a static force by applying a driving voltage to the selected stator electrode section; and a dynamic pressure groove (23) which is arranged on the opposing plane of the rotor plate and generates a pressure in a direction of separating the rotor plate from the stator plate. The rotor electrode sections are previously grounded.

HIRATA MASAKAZU (JP)
OUMI MANABU (JP)
CHIBA NORIO (JP)
NAKAJIMA KUNIO (JP)
IIJIMA RYUJI (JP)
OHKUBO TOSHIFUMI (JP)

PCT/JP2006/324150

August 23, 2007

December 04, 2006

Click for automatic bibliography generation  

SEIKO INSTR INC (JP)
TOYO UNIVERSITY (JP)
HIRATA MASAKAZU (JP)
OUMI MANABU (JP)
CHIBA NORIO (JP)
NAKAJIMA KUNIO (JP)
IIJIMA RYUJI (JP)
OHKUBO TOSHIFUMI (JP)

H02N1/00; G11B19/20; H02K7/08

US20020163281A1	2002-11-07
JPH04244790A	1992-09-01
JP2005287094A	2005-10-13
JP2002372039A	2002-12-26

MATSUSHITA, Yoshiharu (11-2 Hiroo 1-chom, Shibuya-ku Tokyo 12, JP)

View/Download PDF      PDF Help

Previous Patent: ANTENNA STRUCTURE AND RADIO COMMUNICATION DEVICE EMPLOYING IT

Next Patent: CONTINUOUS PARTICULATE HIGH-TEMPERATURE GAS TREATMENT APPARATUS AND METHOD OF TREATING