公开(公告)号：US11539309B2

公开(公告)日：2022-12-27

申请号：US17079432

申请日：2020-10-24

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Weijia Shi ,  Xuyang Yu ,  Bo Zhao ,  Jiubin Tan

IPC: H02N2/14 ,  H02N2/00

Abstract: A zero-voltage zero-current soft switching type driving method for an ultrasonic motor is provided, relating to the technical field of driving of a two-phase actuator. The disclosure solves the problems of high loss, high heat amount and the like in a traditional ultrasonic motor driving circuit. The method provided realizes resonance between series inductors and buffer capacitors by means of an optimal design of the inductance of matching inductors, the capacitance of buffer capacitors, a dead time value and a delay time value, thereby causing a power tube to realize zero-voltage and zero-current switching. Two signal input ends of a two-phase pseudo full bridge inverter are connected to a power grid, and two signal output ends of the two-phase pseudo full bridge inverter are respectively connected to two signal input ends of a matching circuit; and the output ends of the matching circuit are respectively connected to a two-phase ultrasonic motor.

公开(公告)号：US20240418598A1

公开(公告)日：2024-12-19

申请号：US18670629

申请日：2024-05-21

Applicant: Harbin Institute of Technology

Inventor： Chenglong Yu ,  Bin Li ,  Tianyi Li ,  Xuyang Yu ,  Bo Zhao

IPC: G01M7/06

Abstract: Provided is a six-degree-of-freedom vibrational excitation foundation platform, which solves the problem of the existing vibrational excitation foundation equipment that a vibrational excitation frequency band is narrow due to low natural frequency of the equipment. The six-degree-of-freedom vibrational excitation foundation platform includes a marble platform support frame, which is fixedly installed on a concrete floor through a backing plate; and a marble platform, which serves as an excitated device and is located in a middle of the support frame, and four sides of the marble platform support frame are connected to the motors fixedly connected to the support frame through connecting plates. The parallel connection of motor outputs solves the problem of insufficient excitation, and natural frequency of each part of the platform is increased by optimizing the marble platform and the support frame, such that the frequencies are controllable within the vibrational excitation frequency band.