Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 9, 2010
Patent Application Number
11794081
Date Filed
December 20, 2005
Patent Primary Examiner
Patent abstract
In a motor driving apparatus, a control unit detects a rotation frequency of a motor to be driven and generates a control voltage Vcnt in a manner such that the rotation frequency thereof is brought close to a desired rotation frequency. A clamping circuit sets an upper limit Vcu and a lower limit Vcl of the control voltage Vcnt. A drive unit drives the motor based on the control voltage Vcnt generated by the control unit. A start circuit fixes the control voltage Vcnt to a predetermined initial voltage Vinit at the start of driving the motor.
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