| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of operating a rotary electric machine that is adapted to prevent power semiconductor switches from rapidly deteriorating, by reducing the switching frequencies of the power semiconductors. <P>SOLUTION: A method of operating a rotary electric machine is identified. The rotary electric machine is connected to a transducer circuit having a DC voltage circuit in phase, in order to connect at least two voltage levels, and the phase of the transducer circuit is connected to the DC voltage circuit, depending on the combination of switching states in which switching states are selected for the power semiconductor switches inside the transducer circuit. In order to reduce the switching frequencies of the power semiconductor switches, predictions are made, with regard to further behaviors of the entire system. In accordance with the predictions, selections are made, with regard to the number of transitions from preceding selected combinations of switching states to the selected combinations of the switching states, starting from selected combinations of switching states where optimum combinations of switching states precede, and with regard to respective predetermined value ranges, with respect to the torques of the rotary electric machines and stator magnetic fluxes of rotary electric machines, and potentials at sub-connections. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
