Discontinuous mode back EMF measurement

Details Discontinuous mode back EMF measurement Discontinuous mode back EMF measurement

2007-11-15

2009-08-18

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040, C318S494000

Reexamination Certificate

active

07576939

ABSTRACT:
A terminal voltage of an actuator motor is measured while the actuator motor is in a high impedance state. An internal voltage of the actuator motor is measured, and a back-EMF voltage of the actuator motor is estimated in response to the terminal voltage of the actuator motor and the internal voltage of the actuator motor. A drive current supplied to the actuator motor is controlled in response to the estimated back-EMF.

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