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This paper presents a new hybrid cascaded H-bridge multilevel inverter (HCMLI) motor drive DTC control scheme for electric vehicles or hybrid electric vehicles where each phase of the inverter can be implemented using only a single DC source. Traditionally, each phase of the inverter require n DC source for 2n + 1 output voltage levels. In this paper, a scheme is proposed that allows the use of a...
The paper deals with isotropic PM-brushless drives in configuration “single-inverter, dual-motor” operating with unbalanced load-torques. After a short review of some control techniques based on the classical control methodologies of single-motor PM drives, an innovative control algorithm is presented. It is suitable to minimize the resultant armature current needed to obtain an assigned resultant...
Direct torque control (DTC) has the characters such as combined simplicity and robustness with excellent performance of torque control for the drive system. A DTC technique for drive system fed on three-level inverter and induction motor is presented, which means to select and compose right voltage vectors varying from speed working inconstant torque area . The mathematic and simulation models of...
This paper deals with an extension of Park's transformation to model permanent magnet (PM) non- sinusoidal machines by means of the so-called pseudo-dq axes reference frame. Speed and torque vector control can then be implemented resulting in a motor drive performance close to that of sinusoidal PM machines drives. Similarly, the proposed control algorithm is derived by decomposing the machine current...
A newly control strategy for brushless dc motor drives is present. The three-dimensional X-Y-Z coordinate is adopted, and the off-phase axis is put on the Z axis, while the axis of two excited-phases on the XY plane. Compared with the complicated three dimensional locus of voltage vector and flux-linkage vector, their projections on XY plane are more concise. The projections of voltage vector are...
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