Stator base for three-degree-of-freedom spherical rotor ultrasonic motor

A spherical rotor, ultrasonic motor technology, applied in generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve problems such as insufficient driving capacity, complex structure, and insufficient driving feet. , to achieve the effect of simple structure, improved driving ability and mass production
CN106533254AActive Publication Date: 2017-03-22HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2017-03-22

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Abstract

The invention provides a stator base for a three-degree-of-freedom spherical rotor ultrasonic motor, relates to the three-degree-of-freedom spherical rotor ultrasonic motor, and aims at solving the problems that an existing multi-degree-of-freedom rotary ultrasonic motor is insufficient in drive capability and complicated in structure, and miniaturization is difficult to implement. An axial vibration ring, a spacer ring and a radial vibration ring are coaxial, and the axial vibration ring and the radial vibration ring are connected through the middle spacer ring; the upper surface of the axial vibration ring is provided with four drive feet; ten piezoelectric ceramic pieces are fixed on each of the upper surface and the lower surface of the axial vibration ring, a space phase difference between two groups of piezoelectric ceramic pieces is 18 degrees and two adjacent piezoelectric ceramic pieces in each group are opposite in polarization direction; four piezoelectric ceramic pieces of the radial vibration ring are fixed on each of the upper surface and the lower surface of the radial vibration ring, the space phase difference between two groups of piezoelectric ceramic pieces is zero degrees and two adjacent piezoelectric ceramic pieces in each group are opposite in polarization direction; and all piezoelectric ceramic pieces are polarized along the thickness direction. The stator base for the three-degree-of-freedom spherical rotor ultrasonic motor is suitable for the three-degree-of-freedom spherical rotor ultrasonic motor.
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Description

technical field

[0001] The invention relates to a three-degree-of-freedom spherical rotor ultrasonic motor stator base, belonging to the technical field of piezoelectric ultrasonic motors. Background technique

[0002] Piezoelectric ultrasonic motor is a kind of piezoelectric ultrasonic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then passes through the stator, The frictional coupling between the rotors converts the microscopic motion of the particle into the macroscopic motion of the rotor, which has the advantages of low speed and high torque, no need for a speed change mechanism, no electromagnetic interference, fast response, and self-locking when power is off.

[0003] However, the existing multi-degree-of-freedom rotary ultrasonic motors have p...

Claims

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