Vector control of a permanent-magnet synchronous motor using AC-AC matrix converter

This paper uses a recently proposed dqo transformation to analyze a permanent-magnet synchronous machine (PMSM) driven by a nine-switch matrix power converter. The matrix transformation used leads to a new equivalent circuit where its parameters are independent of the frequency of the other side to which the circuit is referred. From this equivalent circuit, a set of command algorithms is deduced in order to control, in an independent way, the flux and torque of the machine. It is shown that the control of the gain and the displacement power factor at either set of terminals is dependent only on the choice of the phase angle in the matrix transformation. In order to verify the validity of the proposed algorithms, a full PMSM drive has been simulated with the assumption of perfect switch behavior for the matrix power converter.