Vibration type motor device

Details Vibration type motor device Vibration type motor device

1995-01-23

1995-10-17

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 214, H01L 4109

Patent

active

054593700

ABSTRACT:
A vibration type motor device for applies a driving signal to a piezoelectric element to obtain a driving force.
When the driving signal is applied to the piezoelectric element via a transformer, pulses having different pulse widths can be applied to first and second switching elements, which switch the direction of a current to be supplied to the primary coil of the transformer, and the resolution of the digital driving control is improved.

REFERENCES:
patent: 4488145 (1984-12-01), Katsuma et al.
patent: 4952834 (1990-08-01), Okada
patent: 5004964 (1991-04-01), Kataoka et al.
patent: 5013982 (1991-05-01), Sasaki

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