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This paper proposes a general space-vector (SV) modulation method for the optimal on-line reduction of the switching losses in any n-multilevel inverter. The proposed method consists of two steps. One is a general principle for generation of the SV map for an arbitrary n-level type to utilize redundant SVs. The other is the optimal selection of the SV pattern which minimizes the switching losses considering...
In order to drive the electric machines using the motors efficiently, the energy loss should be minimized during its operation. The optimal torque and rotating speed trajectories to minimize the energy loss of the induction motor (IM) during its operation has been proposed when the operation time, rotating speed, and rotational angle are given as drive conditions. However, the optimal trajectories...
This paper proposes an optimum PWM method which reduces switching losses of a three-level NPC inverter most effectively by the two-phase modulation method. It selects the optimum one which minimizes a new switching (SW) loss estimation based on reduction effects in switching times considering phase currents among multiple reduction patterns. The proposed method was experimentally verified to select...
In order to drive the electric machines using the motors efficiently, the energy loss should be minimized during its operation. It has been reported that the design methodology of the optimal torque and rotating speed trajectories to minimize the energy loss of the induction motor (IM) drive system when the operation time period, rotating speed range, and rotational angle are given as drive conditions...
This paper proposes an optimum PWM method which reduces switching losses of an inverter most effectively by the two-phase modulation method. It selects the optimum one which minimizes a new switching (SW) loss estimation based on reduction effects in switching times considering phase currents among multiple reduction patterns. The proposed method was experimentally verified to select a optimal switching...
A fast and efficient steady-state simulation method of a power electronic (PE) system is proposed. The conventional methods are efficient only for a single-rate periodic system. The proposed method is efficient also for a multi-rate periodic system including a PE system which has a short switch and a long system periods. Its principle is based on a new extended combination of the envelope-following...
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