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The paper presents the natural extension DTC principle of three level diode clamped voltage inverter fed induction motor. This technique is based on a simple algorithm using look-up table for a three-level inverter established from a standard two-level inverter. The control algorithm is implemented using Field Programmable Gate Arrays (FPGA) with VHDL coding.
This paper presents a simple overmodulation strategy in DTC-hysterisis based structure of induction machine drives. It will be shown that by controlling the shape of stator flux locus, the switching pattern of stator phase voltage can be controlled such that a smooth transition from PWM to six-step is achieved. The locus of the stator flux space vector is controlled by the holding angle which is estimated...
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