An impact rotary motor based on a fiber torsional piezoelectric actuator

Han, W. X.; Zhang, Q.; Ma, Y. T.; Pan, C. L.; Feng, Z. H.
January 2009
Review of Scientific Instruments;Jan2009, Vol. 80 Issue 1, pN.PAG
Academic Journal
A prototype small impact rotary motor has been fabricated based on a newly developed torsional actuator which is 15.0 mm long and 1.0 mm in diameter. The motor can rotate when it is powered with a saw-shaped voltage. The experimental results show that its angular speed is proportional to both the driving voltage’s amplitude and the frequency under 1 kHz. The large nonlinearity occurs at higher driving frequency due to the resonance of the partial mechanical structure of the motor. The motor can rotate at a speed of 90 rpm with a saw-shaped driving voltage of 600Vp.-p. at 8 kHz, and produce a stall torque of 80 μN m with 1000Vp.-p. at 3 kHz.


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