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In order to achieve sensorless control for permanent magnet synchronous motor (PMSM), an observer based on model reference adaptive system (MRAS) is designed to estimate the rotor speed according to the mathematic model. A speed sensorless vector control system is established and simulated with Simulink. Simulation results show that the MRAS-based control system, which is able to implement the speed...
This paper describes a simplified sensorless vector control for permanent magnet synchronous motors (PMSM) using the average of the DC bus current. This method sets up the drive control system at relatively inexpensive because the micro controller does not need to have a precise timer and the calculation load is slight. The proposed method effectively changes two different current estimation methods...
This paper describes a position sensorless drive system for the PMSM. The inverter is controlled using the over-modulation range at high speed in order to increase the torque and output power at high speed and to expand the operating range. The position and speed are estimated based on the estimation of an extended electromotive force in the rotating frame. In this paper, a sensorless control method...
In this paper, the position sensorless direct torque and indirect flux control (DTIFC) of BLDC motor with non-sinusoidal (non-ideal trapezoidal) back-EMF has been extensively investigated using three-phase conduction scheme with six-switch inverter. In the literature, several methods have been proposed to eliminate the low-frequency torque pulsations for BLDC motor drives such as Fourier series analysis...
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