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This paper proposes a highly improvised and a vibrant sensorless vector control of the three-phase induction motor drive, brought out by a combination of sliding mode control and Space vector pulse width modulated inverter, with “Direct synthesis from State Equations” (DSS) as the technique for estimating speed. Field oriented Vector control method of decoupling the flux and torque and controlling...
This paper aims to develop an innovative direct torque control (DTC) for an induction motor (IM) drive based on model prediction (MP). An effective methodology for the optimum selection of weighting factor is proposed, based on the evaluation of ripple behavior. A sensorless speed estimation technique utilizing the predictive nature of proposed MP DTC is adopted. Firstly, the paper introduces a detailed...
This paper describes a novel rotor position estimation method for IPMSM at low speed without any signal injection. The basic idea of proposed method is using derivative currents in zero vector state, because the derivative currents include the rotor position information. This paper presents the relationship between rotor position and current response at zero vector mathematically. By this relationship,...
AC drives based on full digital control have reached the status of a maturing technology in a broad range of applications, ranging from low-cost to high performance systems. In the field of the drive of the electric machines, the elimination of the mechanical speed sensor can present an economic interest and improve safety of operation. With speed estimation, sensorless vector control is possible,...
The speed and position estimation from Back EMF has been a problem under speed reversal response due to change of sign of speed. In this paper, an algorithm using fuzzy logic is proposed to estimate the speed and position of BLDC motor from back EMF for sensorless brushless DC (BLDC) motor drives to improve the performance of conventional sensorless drives. Most existing sensorless methods of the...
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