Piezoelectric miniature motor e.g. for photographic and cinematographic equipment drives, printers, tape-recorders and CD devices

摘要

The motor contains a stator (1) with attached piezoelectric oscillator in the form of a cylindrical piezoelectrical element (3) with two ultrasonic wave generators (4,5), each with a connection to a voltage generation device, and a rotor (9) with which the oscillator has a contact. The ultrasonic wave generators have two separate (6,7) and one common (8) parts forming a divider for the voltage generator. The common part simultaneously forms a summer for a part of the generated voltages, thus fulfilling the function of a third ultrasonic wave generator.