Application Cases

Name of experiment：application of power signal generator ATG-2042 in the basic research of ultrasonic motor of micro-rotor aircraft

Research direction：drive of ultrasonic motor

Experimental purpose：in order to solve the problems existing in the power unit of micro-aircraft, a thin plate rotary ultrasonic motor with multiple spoke driven by in-plane standing wave was designed. The finite element method is used to optimize the structural parameters, and the modal planning and analysis of the piezoelectric oscillator are carried out. The results show that the piezoelectric oscillator has the characteristics of simple structure and excitation mode.

Test equipment：ATG-2042 power signal generator (signal source + power amplifier), oscilloscope, piezoelectric vibrator under test, computer, microcontroller, laser emitter.

Experimental process：

According to the driving principle of the piezoelectric oscillator, the same excitation signal is applied to the upper and lower piezoelectric ceramics of the piezoelectric oscillator to make the piezoelectric oscillator vibrate, and the driving point at the top obtains a small amplitude elliptic motion to drive the rotating shaft. Here, the power signal generator is used directly as the signal generator and power amplifier to simplify the experimental device, and the oscilloscope is used to monitor the voltage and frequency of the excitation signal actually applied on the piezoelectric oscillator. The principle prototype of ultrasonic motor was fixed on the base with hot melt adhesive. The fixed place was the vibration node of piezoelectric vibrator to reduce the impact on vibration. The following figure shows the frequency sensitivity experimental device of the principle prototype:

Result of experiment：the optimal operating frequency band of the piezoelectric oscillator is between 98.3kHz and 98.7kHz, in which the motor speed reaches the maximum and remains basically unchanged. The operating frequency bandwidth is 0.5kHz, which can effectively avoid the problem of operating frequency drift caused by assembly errors.

the relationship between no-load speed and driving frequency of prototype

The ATG-2042 power signal generator used in the experiment can be used either as a power signal generator or as a power amplifier. When used as a power signal generator, there is no need to access additional power amplifier.

Parameters and appearance of ATG-2042：