Analysis and simulation of PWM based power amplifier for single axis Active Magnetic Bearing (AMB)

The objective of this paper is time response analysis of power amplifiers by using PSIM based software used in the active magnetic bearing system. The coil current for the magnets used in levitation needs to be precisely controlled to meet the attractive force demand. This calls for a fast DC to DC power amplifier that can be controlled in a closed loop fashion. Here, power amplifier is used to convert a fixed dc voltage to an adjustable dc output voltage. Different kinds of power amplifiers are proposed for Active Magnetic Bearing.