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RISS 인기검색어
- 검색키워드
- 저자 : Markadeh, Gholamreza Arab (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
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G. R. Arab Markadeh,J. Soltani 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
A Direct torque and flux control design for a sensorless induction motor, following a sliding mode observer is presented. In this control scheme, the torque error signal and the reference amplitude of the stator flux vector are delivered to a PI predictive controller. The predictive controller also uses information on the amplitude and position of the actual stator flux vector and measured current to determine the voltage command vector for space<br/> vector modulation (SVM). Using the fifth order model of three-phase induction machines in a stationary two axes reference frame, a sliding- mode (SM) observer is developed based on equivalent control concept in order to estimate the rotor speed and rotor time constant simultaneously. The stability of SM observer is proved by Lyapunov theory. In addition, a simple Lyapunov-based estimator is also used for on-line detecting of the stator resistance. Moreover, a composite SM controller is employed that combines nominal linear quadratic feedback control (LQC) and a SM contyrol. The composite speed controller, makes the drive system states follow the nominal trajectories in spite of parameter uncertainties and external load torque disturbance. The effectiveness of the proposed control scheme is verified by computer simulation.
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Model Following Sliding-Mode Control of a Six-Phase Induction Motor Drive
Abjadi, Navid R.,Markadeh, Gholamreza Arab,Soltan, Jafar The Korean Institute of Power Electronics 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6
In this paper an effective direct torque control (DTC) and stator flux control is developed for a quasi six-phase induction motor (QIM) drive with sinusoidally distributed windings. Combining sliding-mode (SM) control and adaptive input-output feedback linearization, a nonlinear controller is designed in the stationary reference frame, which is capable of tracking control of the stator flux and torque independently. The motor controllers are designed in order to track a desired second order linear reference model in spite of motor resistances mismatching. The effectiveness and capability of the proposed method is shown by practical results obtained for a QIM supplied from a voltage source inverter (VSI).
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Hajian, Masood,Soltani, Jafar,Markadeh, Gholamreza Arab,Hosseinnia, Saeed The Korean Institute of Power Electronics 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.4
Direct torque control (DTC) of induction machines (IM) is a well-known strategy of these drives control which has a fast dynamic and a good tracking response. In this paper a nonlinear DTC of speed sensorless IM drives is presented which is based on input-output feedback linearization control theory. The IM model includes iron losses using a speed dependent shunt resistance which is determined through some effective experiments. A stator flux vector is estimated through a simple integrator based on stator voltage equations in the stationary frame. A novel method is introduced for DC offset compensation which is a major problem of AC machines, especially at low speeds. Rotor speed is also determined using a rotor flux sliding-mode (SM) observer which is capable of rotor flux space vector and rotor speed simultaneous estimation. In addition, stator and rotor resistances are estimated using a simple but effective recursive least squares (RLS) method combined with the so-called SM observer. The proposed control idea is experimentally implemented in real time using a FPGA board synchronized with a personal computer (PC). Simulation and experimental results are presented to show the capability and validity of the proposed control method.
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J.Soltani,M.Ghassemi,G. Reza Arab Markadeh 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
This paper describes a sliding-mode(SM) torque control for an interior type Permanent synchronous motor (IPMSM) based on space vector modulation (SVM).The motor drive is supplied by a two-level SV-based PWM inverter, so that the inverter reference voltage is generated by two integral types sliding mode(SM) controllers in a stationary two axes reference frame. In addition, the rotor speed and rotor position are on-line estimated by a sliding-mode observer, which uses only the stator currents and voltages. The observer stability is proved by Lyapunov theory. The control strategies of maximum torque per ampere (MTPA) related to IPMSM, in<br/> constant torque region and the flux weakening operation in constant power region are considered. Computer simulation results obtained, well demonstrate the effectiveness of the proposed control approach.
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Masood Hajian,Jafar Soltani,Gholamreza Arab Markadeh,Saeed Hosseinnia 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.4
Direct torque control (DTC) of induction machines (IM) is a well-known strategy of these drives control which has a fast dynamic and a good tracking response. In this paper a nonlinear DTC of speed sensorless IM drives is presented which is based on input-output feedback linearization control theory. The IM model includes iron losses using a speed dependent shunt resistance which is determined through some effective experiments. A stator flux vector is estimated through a simple integrator based on stator voltage equations in the stationary frame. A novel method is introduced for DC offset compensation which is a major problem of AC machines, especially at low speeds. Rotor speed is also determined using a rotor flux sliding-mode (SM) observer which is capable of rotor flux space vector and rotor speed simultaneous estimation. In addition, stator and rotor resistances are estimated using a simple but effective recursive least squares (RLS) method combined with the so-called SM observer. The proposed control idea is experimentally implemented in real time using a FPGA board synchronized with a personal computer (PC). Simulation and experimental results are presented to show the capability and validity of the proposed control method.
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Model Following Sliding-Mode Control of a Six-Phase Induction Motor Drive
Navid R. Abjadi,Gholamreza Arab Markadeh,Jafar Soltani 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6
In this paper an effective direct torque control (DTC) and stator flux control is developed for a quasi six-phase induction motor (QIM) drive with sinusoidally distributed windings. Combining sliding-mode (SM) control and adaptive input-output feedback linearization, a nonlinear controller is designed in the stationary reference frame, which is capable of tracking control of the stator flux and torque independently. The motor controllers are designed in order to track a desired second order linear reference model in spite of motor resistances mismatching. The effectiveness and capability of the proposed method is shown by practical results obtained for a QIM supplied from a voltage source inverter (VSI).
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