Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1996-11-12
1999-02-23
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
H01L 4108
Patent
active
058747990
ABSTRACT:
A control device for an ultrasonic motor includes a control calculation circuit for calculating position, i.e., the rotation amount and speed of the motor, a linearization function generation circuit for receiving the output signal from the control calculation circuit and outputting the amplitude information of a stator constituting the motor and the phase difference information of two driving signals for driving the stator, and a driving circuit responsive to the output signal from the generation circuit to supply the driving signals to the stator.
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Mitarai Reiji
Takeishi Hiroaki
Budd Mark O.
Canon Kabushiki Kaisha
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