Rotor Flux based Model Reference Adaptive System (RF-MRAS) is the most popularly used conventional speed estimation scheme for sensor-less IM drives. In this scheme, the voltage model equations are used for the reference model. This encounters major drawbacks at low frequencies/speed which leads to the poor performance of RF-MRAS. Replacing the reference model using Neural Network (NN) based fl...

In the permanent magnet synchronous motor (PMSM) sensorless drive method, inductance is a decisive parameter for rotor position estimation. Due to core magnetic saturation, current easily invokes variation and degrades estimation accuracy. For constant load torque, saturated error in method are constant. Inductance results minor degradations, such as less optimal torque current, but no speed er...

This paper investigates a method for the state estimation of nonlinear systems described by a class of differentialalgebraic equation (DAE) models using the extended Kalman filter. The method involves the use of a transformation from a DAE to ordinary differential equation (ODE). A relevant dynamic power system model using decoupled techniques will be proposed. The estimation technique consists...

This paper presents the design of an aquatic robot actuated by one internal rotor. The body has a cylindrical form with base in symmetric airfoil sharp edge. For this object, equations motion are presented Kirchhoff for rigid ideal fluid, which supplemented viscous resistance terms. A prototype rotor is developed. Using prototype, experimental investigations fluid carried out.

In the past few decades the control circuitry was conventionally built from logic hardware and discrete components with inherent limitations of low processing power. Advances in microprocessors, microcontrollers, and microcomputers have made tremendous impact on electric motor drives. It has enabled implementation of sophisticated and complex control techniques. Conventional vector control sche...

Speed feedback is indispensable not only for closed-loop controlled induction motors (IM) but also the state monitoring systems of open-loop IMs. Replacing speed sensors with estimations has many advantages including, e.g., hardware complexity reduction, sensor cabling elimination, and reduction IM drive costs. From various methods estimation proposed in literature, model reference adaptive sys...

The sensorless application of predictive control in drive applications has been investigated for a decade. Finite set model (FCS-MPC) is one the easy and practical methods category. Several have FCS-MPC. Since sensitivity method to speed error more than that classical methods, sophisticated estimators should be used this method. reference adaptive system (MRAS) most successful estimator. main p...

In order to harness the kinetic energy of marine currents, we propose a novel ocean-current turbine with a horizontal axis. The turbine can be moored to the seabed and function similarly to kites in a water flow. To operate such turbines in a marine current, the resulting rotor torque needs to be canceled. Therefore, the proposed turbine is designed with a float at its top and a counterweight a...