Application of power signal source ATG-2042 in basic research of ultrasonic motor for micro-rotor aircraft

Experiment name: Application of power signal source ATG-2042 in basic research of ultrasonic motors for micro-rotor aircraft

Experimental purpose: To address the problems existing in the power devices of existing micro-aircraft, a multi-spoke thin-plate rotary ultrasonic motor based on in-plane standing wave drive was designed. The structural parameters were optimized using the finite element method, and the piezoelectric vibrator was modally planned and analyzed. The results show that it has the characteristics of simple structure and excitation method.

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

Experimental process:

According to the driving principle of the piezoelectric vibrator, applying the same excitation signal to the upper and lower piezoelectric ceramics of the piezoelectric vibrator can make the piezoelectric vibrator vibrate, and the driving point at the top of the spoke-shaped teeth obtains a slight elliptical motion, thereby driving the shaft to rotate.

Here, the power signal generator is used directly as the power signal source to simplify the experimental device, and the oscilloscope is used to monitor the voltage and frequency of the excitation signal actually applied to the piezoelectric vibrator. The ultrasonic motor prototype is fixed on the base with hot melt adhesive, and the fixed point is the vibration node of the piezoelectric vibrator to reduce the impact on the vibration.

Principle prototype frequency sensitivity experimental device

Experimental results:

The optimal operating frequency band of the piezoelectric vibrator is between 98.3kHz and 98.7kHz. In this frequency band, 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 and other reasons.

Relationship between no-load speed and driving frequency of principle prototype

The ATG-2042 power signal generator used in the experiment can be used as both a power signal source and a power amplifier. When used as a power signal source, no additional power amplifier is required.

Power signal source ATG-2042: