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As a result of dead-time, device on-state voltage drop, DC bus voltage error and fluctuation, etc., Volt-sec. errors degrade precise control of torque and flux linkage, particularly at low speeds. This is true for deadbeat-direct torque and flux control (DB-DTFC) which directly manipulates the Volt-sec. vector sourced by inverters as well as for indirect field oriented control (IFOC) drives. This...
Direct torque control (DTC) has become a widely acceptable alternative to field oriented control (FOC). Deadbeat-direct torque and flux control (DB-DTFC) is a significant improvement over the classical DTC methods and provides the opportunities for fast simultaneous control of torque and dynamic loss minimization. DB-DTFC uses estimated torque and stator flux magnitude from a stator flux observer...
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