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This work compares the use of direct torque and flux control (DTFC) and model predictive control (MPC) for induction motor (IM) control. These two strategies are fundamentally different in operation since (i) DTFC decides the current control action based on a switching table constructed using a simplified model of the IM, whereas (ii) MPC decides the current control action by on-line minimization...
In this paper, a flexible DTC based on variable structure approach and space vector modulation is presented for encoderless Synchronous Reluctance Motor (SynRM) Drives. According to this method, a sliding mode-plus-PI controller is designed for torque and flux control in stator flux reference frame, respectively. The proposed controller is able to reduce the torque, flux, current and speed pulsations...
This paper presents a novel control method to separate the inverter switching pattern optimization from induction motor's torque and flux control. The optimization is defined in terms of common mode current reduction. The motor control is based on the calculation of desired phase currents with given torque and flux references. The common mode current reduction is achieved by neutral point voltage...
This paper describes a control scheme for direct torque and flux control (DTC) of induction machines based on the stator flux orientation method. With the proposed hybrid control scheme, an inverter duty cycle is calculated via Lyapunov stability issue each switching period based on the torque and flux errors. The direct method of Lyapunov is used to analyze stability of the system and an hybrid control...
In this paper, direct torque control (DTC) of a three-phase permanent magnet (PM) brushless AC (BLAC) motor having one phase open-circuit fault is described. An extra inverter leg is employed to provide the current path during the fault operation. The new flux estimation algorithm for the faulty motor is presented. The simulation results show that the proposed DTC yields satisfactory torque and flux...
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