An alternate stepping piezoelectric linear motor

An alternate stepping piezoelectric linear motor was proposed. The operation principle of this novel linear motor was analyzed. A prototype was fabricated and its mechanical properties was tested which proves that the principle is feasible. When the motor is driven by three-phase square and triangular waves and four-phase sine waves at a voltage of 100V(peak to peak value), and frequency of 100Hz, the speeds without load are 0.502mm/s and 0.432mm/s and the maximum outputs are 4.63N and 3.73N.The mechanical properties of the motor have been improved.