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4 publications

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    Direct Power Control of Induction Motor Drive

    By AH. Niasar, Hossein Rahimi Khoei

    Abstract: Different variable frequency strategies have been developed for control of induction motors including V/f scalar control; field oriented control (FOC), and direct torque control (DTC). Recently, direct power control (DPC) has been developed to control dual-fed induction generators (DFIGs) and permanent magnet synchronous generators (PMSGs). In this paper, DPC is employed for speed control of induction motors fed by a voltage source inverter. DPC is basically similar to DTC method …

    Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 2, 2014 · pp. 48–55 Read article

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    Direct Power Control of Brushless DC Motor Drive

    By AH. Niasar, Mozhgan Behzadi Shahrbabak

    Abstract: Recently, due to significant increase in demands of electric motors, design and manufacturing of high efficiency motors and related variable speed drives have been regarded by many suppliers. Among several kinds of motors, the brushless DC (BLDC) motor has many advantages including high torque capability. In this paper, for the first time, the possibilities of direct power control (DPC) of BLDC motors fed by a voltage source inverter have been …

    Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 1, 2014 · pp. 13–24 Read article

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    Sensorless Direct Power Control of Brushless DC Motor Drive using Unknown Input Speed Observer

    By AH. Niasar, Saber Jamshidi far, Ali Reza Faraji

    Abstract: This paper proposes the speed control of brushless DC (BLDC) motor via direct power control (DPC) method as a novel and effective strategy in electrical drives applications. The DPC has some advantages rather than other control methods of BLDC motor including simpler control algorithm and faster dynamic response. In proposed BLDC motor drive based on DPC strategy, space vector modulation (SVM) voltage source inverter is employed. To enhance the drive …

    Published in Journal of Control & Instrumentation · Vol. 6, Issue 3, 2015 · pp. 31–41 Read article

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    Speed Estimation of High-Speed Hysteresis Motor Based on Extended Kalman Filter

    By AH. Niasar, AN. Darbaghshahi, M. Shirani

    Abstract: High-speed hysteresis motors are used in special industries such as medical centrifuges and gyroscopes. In spite of that, they are synchronous motors in some situations they may work in asynchronous speed. So, for reliable performance of hysteresis motor, closed loop control strategies are employed. On this way, speed/position of rotor must be known. Due to difficulty of using the speed sensors in high-speed hysteresis motor drives, employing the speed estimation …

    Published in Journal of Power Electronics and Power Systems · Vol. 6, Issue 1, 2016 · pp. 34–44 Read article

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