Analysis and Development of a Resolution-Level Vector-Controlled WM Inverter-Fed IPM Motor Drive

Abstract

This paper presents the development, the analysis and the implementation of a resolution-level vector- controlled wavelet-modulated (WM) inverter-fed interior permanent magnet (IPM) motor drive. The proposed controller is based on mapping the changes of the quadrature axis component iq of the line currents to a phase-shift angle thetas, while maintaining the direct axis component id constant. The phase-shift thetas is introduced in the first derivative of the reference modulating signals in order to obtain a resolution-level controlled (RLC) WM inverter output voltages. The mapping of changes in iq changes is used to generate switching signals to the WM inverter to adjust its output voltages in response to changes in the load and/or the speed of the IPM motor. The proposed resolution-level vector-controlled WM inverter-fed IPM drive system is implemented in MATLAB/SIMULINKreg for performance simulations. The simulation test results show a stable, fast and effective adjustment of the inverter output voltage in response to load and/or speed changes in the simulated IPM motor drive system. Furthermore, The complete drive incorporating the RLC vector controller is successfully implemented in real-time using a digital signal processor board dSPACE ds1102 for a laboratory 1-hp interior permanent magnet motor. This paper provides pertinent analytical tools for researchers and practicing engineers regarding the application of controlled WM inverters in IPM motor drives.