Electricity: motive power systems – Impact – mechanical shock – or vibration-producing motors
Reexamination Certificate
2006-02-28
2006-02-28
Schuberg, Darren (Department: 2834)
Electricity: motive power systems
Impact, mechanical shock, or vibration-producing motors
C318S127000, C318S128000
Reexamination Certificate
active
07005810
ABSTRACT:
An apparatus for driving a linear vibration motor that employs a proper motor thrust constant value corresponding to each linear vibration motor at position calculation for obtaining the position of the mover of the linear vibration motor, thereby increasing the accuracy of the position calculation. This motor driving apparatus includes a motor driver for applying a DC voltage to the linear vibration motor, and a thrust detection unit for detecting a thrust of the mover, which is generated by the application of the DC voltage to the linear vibration motor, and calculates the thrust constant of the linear vibration motor according to an arithmetic operation of dividing the mover thrust detected by the thrust detection unit, by a value of a DC current that is supplied to the linear vibration motor due to the application of the DC voltage to the linear vibration motor.
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Nakata Hideki
Ueda Mitsuo
Yoshida Makoto
Jones Judson H.
Schuberg Darren
Wenderoth , Lind & Ponack, L.L.P.
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