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A fault-tolerant technique valid for both open-loop and vector-control motor-drive systems is introduced in this paper. The technique is merely presented for AC motors with Delta-connected circuits in their stator windings. Hence, it enables the operation of the three phase motor upon a failure in one of its phases without the need of a special fault detection algorithm. This technique is to significantly...
This paper presents a simple speed control method of an asymmetrical parameter type two-phase induction motor drive using a three-leg voltage source inverter (VSI). The two-phase induction motor is adapted from an existing single-phase induction motor resulting in impedance unbalance between main and auxiliary windings. Thus in order to improve the performance it needs an unbalanced phase supply....
The diametrical inversion (DI) of the stator voltages has been used to control the rotor position of the three-phase-induction motor. In this paper the DI is applied on a single-phase induction motor drive to control its speed. The change of the speed error sign causes a DI. Each DI inverts the stator voltage phasor and its angular velocity. The main and the auxiliary windings are always connected...
Many techniques are available for control of three-phase machines to extract the best performance. However, no generalized technique exists for the application to single-phase induction motor (SPIM) drives. An application of SPIM is not just limited to fans, but it is being used in many domestic gadgets and consumer electronics applications. In this paper, a SPIM is controlled using a dynamic capacitor...
The paper analyses the inductance saturation effects of an induction motor in order to be considered in the nonlinear control drive technique. The involved inductances are determined through finite element modeling of the induction machine. The impact of coupled field and circuit approach on the derived parameter variation has also been examined. The methodology is suitable for control techniques...
This paper proposes a closed-loop control strategy to operate an off-the-shelf single-phase induction motor (IM) as a symmetrical two-phase IM. The proposed control strategy employs the slip frequency control technique to independently control the stator currents of both the main and auxiliary windings and make them follow a predefined sinusoidal waveform. Experimental results show that the proposed...
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