Ultrasonic motor starting device and starting method based on high-performance index output

The ultrasonic motor starting device and method address startup reliability issues by using a two-input AND gate, D flip-flop, latch, and frequency divider counter to achieve zero-phase synchronization and bi-fold frequency difference, enhancing safety and reliability to 99.99% for critical applications.

JP7894583B2Active Publication Date: 2026-07-24NUAA SUPER CONTROL TECHNOLOGY CO LTD +1
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Patent Information

Authority / Receiving Office
JP Β· JP
Patent Type
Patents
Current Assignee / Owner
NUAA SUPER CONTROL TECHNOLOGY CO LTD
Filing Date
2024-03-14
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Ultrasonic motors, particularly traveling-wave ultrasonic motors, face reliability issues during startup, limiting their application in critical areas requiring high safety and reliability, such as aerospace, medical, marine, automotive, and nuclear fields, with existing starting methods achieving only 90% safety and reliability.

Method used

A starting device and method utilizing a two-input AND gate, D flip-flop, latch, and frequency divider counter to implement zero-phase synchronization and bi-fold frequency difference operations, ensuring safe and reliable startup by transitioning from an upper limit drive signal frequency to the operating frequency of the ultrasonic motor.

Benefits of technology

The solution enhances startup safety and reliability from 90% to over 99.99% by employing zero-phase synchronization and bi-fold frequency difference operations, ensuring consistent rotational speed changes and improved reliability.

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Abstract

The present invention provides an ultrasonic motor starting device and method based on an index output with high performance, which relates to the field of ultrasonic motor starting. The device includes a two-input AND gate having a first input terminal, a second input terminal and an output terminal, and the first input terminal is T i It is used to input the timing signal, and the second input terminal is connected to the pulse output terminal of the division counter, the output terminal of the AND gate is connected to the input terminal of the D flip-flop, the clock terminal of the D flip-flop is connected to the clock terminal of the division counter, and receives the CLOCK clock, the CLOCK clock is the system clock, the output terminal of the D flip-flop is connected to the clock terminal of the latch, and the input terminal of the latch is i DATA is used to receive the division value, F i The DATA division value is the time length T i The multi-channel data output terminal of the latch is connected to the data input terminal of the frequency divider counter, and the output terminal of the frequency divider counter outputs a SIN driving signal or a COS driving signal. The present invention can improve the safety and reliability of ultrasonic motor starting.
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