Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masaki Tagome0
Hideaki Mori0
Hisanori Nagase0
Makoto Gotou0
Date of Patent
August 22, 2006
0Patent Application Number
108122890
Date Filed
March 29, 2004
0Patent Primary Examiner
Patent abstract
In a motor and a disk drive apparatus in accordance with the present invention, a position detecting part 30 comprises a detection signal switching circuit 39A, a noise elimination circuit 38 and a detection circuit 39B, and the detection signal switching circuit 39A is configured to output an inverted detection signal obtained by logically inverting a detection signal until the rotation speed reaches a predetermined rotation speed after the beginning of starting or until a position detection pulse signal FG is detected a predetermined number of times; position detection operation is carried out only during the ON operation of PWM, whereby PWM sensorless starting is carried out.
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