Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MAGNETIC BEARING DEVICE AND VACUUM PUMP
Document Type and Number:
Japanese Patent JP2015036575
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a magnetic bearing device in which an S/N ratio of displacement information can be improved.SOLUTION: In the magnetic bearing device, a second carrier wave signal applied to a sensor 71y on a Y1 axis is set in such a way that a phase differs in a (π/2+θ) radian with respect to a first carrier wave signal applied to a sensor 71x on an X1 axis, a first modulation signal output from the first sensor 71x is sampled at sampling timing which is deviated by a phase θ from timing at which the first carrier wave signal reaches a peak, and a second modulation signal output from the second sensor 71y is sampled at sampling timing which is deviated by a phase (-θ) from timing at which the second carrier wave signal reaches a peak. As a result, a noise component caused by the interference of an adjacent shaft can be removed.

Inventors:
OZAKI JUNICHIRO
Application Number:
JP2013168546A
Publication Date:
February 23, 2015
Filing Date:
August 14, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SHIMADZU CORP
International Classes:
F16C32/04; F04D19/04
Domestic Patent References:
JP2006308074A2006-11-09
JP2006283799A2006-10-19
Attorney, Agent or Firm:
Fuyuki Nagai



 
Previous Patent: CHANGE GEAR

Next Patent: RESIN TORQUE ROD