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This paper proposes a hexagon voltage manipulating control (HVMC) method for ac motor drives operating at voltage limits. The command output voltage can be simply determined by the torque command and the hexagon voltage boundary in the absence of PI control gains, additional MTPV tracking controllers, and observers for closed-loop control. These attributes reduce the time and effort required for the...
This paper proposes an enhanced direct torque and flux control method using the discrete-time version of the physical constraints to complete the finite-settling-step direct torque and flux control (FSS-DTFC) algorithm with a constant switching frequency. Successful application of the control approach has been corroborated by a graphical and analytical analysis that naturally leads to a single voltage...
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