Design of variable speed scheme for five level DC link inverter for synchronous motor using boost converter

Speed control design of the Permanent magnet brushless dc motor (PMBLDC) using MLDC inverter given a Boost Converter is explained in this paper. The MLDC inverter is having five constant voltage sources, which are controlled by two switches each for a constant voltage source. The variable speed of the synchronous motor can be obtained by controlling these voltage sources The speed cannot be controlled in traditional inverter. It consists of only one voltage source. The fundamental value of the output voltage can be achieved by increasing the number of constant dc voltage cells. To obtain rated voltage across motor the boost converter is situated. This increases the dc voltage up to the required value. The results of traditional inverter and five level inverter is compared and expressed with matlab simulations.