The method of claim 1, further comprising: integrating the polarized back-EMF error signal.ģ. A method comprising: generating a polarity signal indicative of a polarity of a bipolar square wave current measuring a back-EMF error in response to the bipolar square wave current applied to a voice coil motor (VCM) multiplying the back-EMF error by the polarity signal to generate a polarized back-EMF error signal and adjusting the resistance gain in response to the polarized back-EMF error signal.Ģ. Method and circuit for determining the velocity of a data detector mechanism of a mass storage device, or the like, using a BEMF voltage in the associated voice coilĭisk file head positioning servo system incorporating adaptive saturated seek and head offset compensationġ.
Method for precise velocity feedback control in an actuator system of a disk drive Head movement controlling based on servo generated speed control valuesĭisk drive employing seek time vcm ir voltage calibration for velocity control of an actuator armĭisk drive employing VCM demand current to calibrate VCM IR voltage for velocity control of an actuator arm Hard disk drive calibration method and apparatus Method and circuit for controlling sensorless single-phase BLDCM System and method for attenuating noise associated with a back electromotive force signal in a motor System and method for detecting back electromotive force with automatic pole calibrationīACK ELECTROMOTIVE FORCE (BEMF) CALIBRATION METHOD, METHOD OF CONTROLLING UNLOADING OF DISK DRIVE APPARATUS USING BEMF CALIBRATION METHOD, AND DISK DRIVE APPARATUS USING THE SAME
Micro-actuator, micro-actuator suspension, and head gimbal assembly with the sameĭetecting back electromotive force voltage
#Measure bipolar square wave signals update#
Methods and apparatuses for measuring VCM BEMF at a VCM control update rate Disk drive and calibration method thereforīack electromotive force (BEMF) calibration method, method of controlling unloading of disk drive apparatus using BEMF calibration method, and disk drive apparatus using the same
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