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The direct torque and stator flux control (DTFC) for PMSM drives has been used as in many applications [1]-[3]. In traditional DTFC system, the stator flux linkage is estimated by integrating the induced voltage vector. The stator voltage vectors could either be measured by sensor or re-constructed using inverter switching status and the DC bus voltage. However, the measurements of voltage pulse trains...
Sensorless rotor position detection techniques have been gradually developed and proposed, which means that recently available methods can improperly work in some specific conditions. A proper and reliable method is needed. Consequently, a new sensorless rotor position detection technique of permanent magnetic synchronous machines (PMSMs) is proposed in this paper. The proposed method is achieved...
This paper describes a sensorless position and speed detection algorithm designed for permanent magnet linear synchronous motor (PMLSM) drive. Measured line currents and terminal voltages are used to estimate the flux of the alpha-beta axis in stator frame, integrating the back electromotive force (EMF). Position and speed signals are derived from angle of the flux linkage and its change rate. A new...
The paper describes the comparison between four different high-performance techniques used for the sensorless estimation of the motor shaft position in permanent magnet synchronous motor sensorless drives. Rotor position and speed are estimated from either electrical measurement or Hal effect pulses, and are used as feedback in a sensorless vector control scheme, achieving almost the same high performance...
In order to increase the accuracy of the current control loop, usually, well known parameter compensation and/or cross decoupling techniques are employed for advanced AC drives. In this paper, instead of using these techniques an observer-based current controller is proposed for vector controlled induction motor (IM) drives. The control design, based on synchronously rotating d-q frame model of the...
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