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Program-Controlled Driving Power Supply for Single-Chamber and Single-Vibrator Piezoelectric Pump

According to driving requirements of single-chamber and single-vibrator piezoelectric pump, a program-controlled driving power supply is designed. The power supply first utilizes D/A converter and voltage-controlled oscillator to generate sine signal with adjustable frequency, then it changes the amplitude of signal by T-type resistor network. At last, it utilizes high-voltage amplifier and power amplifier to obtain a high voltage and a large current to realize drive of piezoelectric pump. Output voltage and frequency of power supply can be adjusted under control of program. Prototype of driving power supply is manufactured and its output performance is test. Experimental results show that, in power supply, waveform of the sine signal is satisfying, range of output voltage is 0-170V and range of output frequency is 5-600Hz. Power supply designed meets the driving requirements of piezoelectric pump, and also has merits of small size, light weight and low cost.