Abstarct: This thesis proceed on modeling and control of three phase fout-leg voltage source inverter, and propose two new methods to control. The first technique is on baxse of decoupling and control of system with the aid of state-feedback controllers, however second method decouples system via voltage-feedback control law. In both of them, modeling and control desing procedure has been discussed completely and stability, output-to-distribance responses etc. has been evaluated. Proposed control strategies have no complexity and so are easy to implement, because of operation in abc coordinates and simple stracture. also thay have acceptable performance in unbalanced conditions. Simulation results prove ability of proposed control strategies to reduce the errors of tracking output references with minimum THD and %VR. To test one of proposed control methods in real conditions, An experimental setup of three phase voltage source inverter has been established with its additional requirment devices. Here in this thesis, settup has been introduced well and control implementation procedure has been presented. Exprimental results show acceptable response of control strategy with unbalanced conditions