ABSTRACT
Active Magnetic Bearing (AMB) is naturally non-linear and shaky framework. Current in the magnet coil ought to be kept up legitimately to meet the alluring power demand. So a power amplifier is expected to control in the closed-loop design. In this chapter, distinctive sort of power amplifier is described for AMB. The yield of which is variable DC, whereas input is constant DC. To guarantee the best working for these power amplifiers in any AMB framework, switching and controlling of the switches is important, for this Pulse Width Modulation (PWM) system is utilized. PWM is extremely well known for their dependability, straightforwardness, and performance. A PWM circuit utilizing 555 timer and operational amplifier are imitated in MULTISIM and PSIM which is additionally used to control the power amplifier.
