| Abstract |
State-of-the-art modulation techniques, such as space-vector modulation for the generation of threephasealternating current, result in strong peaks in the output spectrum at the switching frequency andits harmonics. We present a space-vector implementation of a novel control scheme and modulator forcommercial electric vehicle inverters, that freely shapes the spectrum of the switching distortionaccording to a pre-defined ideal spectrum. Furthermore, the predictive control framework allows thepresented controller to actively reduce the switching rate of the converter, reducing switching loss. Thecontrol is implemented in the aß-space-vector frame, allowing the switching states of an inverter to bedirectly determined and modulated based on the optimal line-to-line voltage spectrum, decreasing themaximum dV/dt seen by the motor. Simulations and measurements are performed on a gallium nitrideinverter prototype, showing the ability to increase the spurious free dynamic range by up to 15 dBcompared to space-vector modulation, at a similar same switching rate. |
