Design and Development of High Voltage Linear Amplifier and It’s Application to Piezoelectric Actuators

High voltage linear amplifiers are required to drive different actuators such as Magnetic actuator, Piezoelectric actuator and different motors. In this paper, High voltage linear amplifier is designed and developed to drive Piezoelectric actuators which are used in positioning, pumping and anti-vibration applications. The High voltage linear amplifier is developed using PA91 high voltage power operational amplifier considering inverting op-amp configuration. The voltage gain of the High voltage linear amplifier is -22. Dual power supply is designed and developed to provide VCC (165V) and VEE (-35V) to the High voltage linear amplifier. The High voltage linear amplifier has a voltage range of is -20V to 150V which is same as that of the Piezoelectric actuator and has a current carrying capacity of 200mA. Simulation of linear voltage amplifier is carried out using Multisim software and current carrying capacity of this amplifier is calculated for different frequency and capacitive loads. The practical result of the High voltage linear amplifier is determined for different piezoelectric actuators with different range of frequencies.