Three-dimension self-support swing type high-precision step piezoelectric ultrasonic motor and driving system
Three-dimension self-support swing type high-precision step piezoelectric ultrasonic motor and driving system
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H02N 2/10
Qinghua Univ.
Chu Xiangcheng, Dong Shuxiang, Li Longtu
Key Words:
Three-dimension, self-support, swing type, high-precision step, piezoelectric ultrasonic motor
The high-accuracy step-by-step piezoelectric ultrasonic motor contains rotor, central shaft, stator consisting of upper matching block whose upper end face is formed into three-D self-supporting inwards oblique contact with rotor and two side are thinned, low matching block which is clearance fit with central shaft and screw-fit with upper matching block and piezoelectric ceramic ring plate pressurized between upper matching block and lower matching block and electrcally-insulated with lower matching block, plastic ring fixed in internal hole of lower matching block for positioing central shaft and prepressing regulation mechanism formed from regulating screw and elastic pressing component. Said invention also provides motor drive system formed rom pulse generator circuit, frequency-divisio phase shift circuit controlled by chopper control circuit and voltage change-over circuit.

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