ABSTRACT
In this study, we major discuss a multiple composite piezoelectric
motor. It is made by the base, the multiple composite piezoelectric stator and
the preload adjusting module. The multiple composite piezoelectric stator is composed
of the base, the first actuating element, the second actuating element and
stator. The first actuating element is composed of the longitudinal and the
first bending vibration modules, in which the first bending vibration module
includes the horizontal and vertical bending vibration modules. And the second actuating
element or bending vibration modules, wherein the second actuating element also
includes the horizontal and vertical bending vibration modules. In addition,
the preload adjusting module includes the limiting element, spring, washer
and nut. In order to obtain the best vibration modes of the multiple composite
piezoelectric motor, we use the ANSYS code to simulate. And so as to get the better
performance and efficiency relate to the previous similar type’s motor under
the same driving conditions, we try to use different vibration modules or modes
to drive the multiple composite piezoelectric motor, including the
longitudinal, the first bending, the second bending and the multiple vibration modules
or modes by experiments. According to the results of the simulations and experiments,
we found that the multiple composite piezoelectric motor has better rotational
speed, loading ability and conversion efficiency of direction relate to the
previous similar type’s motor. Where the maximum rotational speed multiple
composite piezoelectric motor is up to 600 rpm under conditions of 180 Vp-p driving voltage, 37.8 kHz
driving frequency, 00 driving phase angle and 12.1 gw loading. And
the maximum loading ability is 2500 gw under conditions of 180 Vp-p driving voltage, 37.8 kHz
driving frequency, 00 driving phase angle and 6rpm rotational speed.