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An active magnetic bearing (AMB) is a mechatronical product which suspends a rotating element called rotor in position without any mechanical contact. This characteristic makes AMB attractive in high speed, high precision and high vacuum applications. Estimation of losses and system parameters of AMB using artificial intelligent techniques is rarely attempted in literature. In the present work using...
In this paper, a simple and effective algorithm for direct torque and flux control three phase induction motor drive is proposed. In this method, control technique is based on decouple between amplitude and angle of reference stator flux for determining required stator voltage vector. This proposed method eliminates the estimation of stator flux angle to generate stator voltage vector with constant...
This paper proposes an algorithm for direct flux and torque controlled sensorless three phase induction motor drive systems. This method is based on control of slip speed and decouple between amplitude and angle of reference stator flux for determining required stator voltage vector. Within the given sampling time, flux as well as torque errors are controlled by stator voltage vector which is evaluated...
We address the problem of meeting the requirements of controllers for the control of speed of induction motors, but under the constraint of not using speed and flux sensors: the so-called ldquosensorlessrdquo control problem. We offer an observer-based solution and present the design of two observers which provide motor speed, flux, and rotor resistance estimates simultaneously. Both observers, based...
We present two observer based solutions to the popular problem of sensorless speed control of induction motors. The observers which provide simultaneous motor speed and flux estimation are based on the basic principles of sliding mode control theory. We present an observer, which incorporates rotor flux dynamics, that can also be used to simultaneously estimate rotor resistance (if unknown). We propose...
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