Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
November 26, 2019
Patent Application Number
15686790
Date Filed
August 25, 2017
Patent Citations Received
Patent Primary Examiner
Patent abstract
When a duration of current noise caused by a PWM control of each excitation amplifier is Td, a cycle of a PWM carrier signal is Tpwm, an on-duty upper limit of the PWM carrier signal under quiet environment without disturbance is Tonu, and an on-duty lower limit of the PWM carrier signal under the quiet environment without the disturbance is Tonl, the AD sampling period includes a first AD sampling period between a point after a lapse of the time Td after a start of the cycle Tpwm and a point after a lapse of a time (Tpwm−Tonu) from the start of the cycle Tpwm, and a second AD sampling period between a point after a lapse of a time (Tpwm−Tonl+Td) from the start of the cycle Tpwm and an end point of the cycle Tpwm.
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