Aplicação do Filtro de Kalman Estendido com matrizes pré sintonizadas ao acionamento sensorless de motores de indução

Sensorless control methods stand out as an alternative for cost reduction and maintenance in AC electric drive systems. This work deals with the application of the Extended Kalman Filter (EKF) to the estimation of the speed and position of the rotor aiming at the implementation of the indirect vector control technique in a speed control system for three- phase induction motors. The Kalman lter, despite its mathematical and computational complexity, performs well under variable speed and load conditions as well as convergence times consistent with the usual requirements of high performance systems. The main contributions of this work are the use of a reduced-order EKF (ROEKF) and the co-variance matrix pretuning in order to accelerate the convergence in the velocity and position estimates for futureimplementations in digital signal processors currently accessible.

Providing Processing of Complex Surfaces by Cutting on Machines Equipped with a Valve Electric Drive with an Information and Measuring System

Promising methods of metal processing by cutting the surface of complex parts are considered. To ensure high productivity when processing complex surfaces on CNC machines, the tool is provided with additional high-speed complex-coordinated movements that ensure the displacement of the cutting edge relative to the cutting surface. The offset of the cutting edges relative to the cutting zone during milling reduces the temperature load on the teeth and, as a result, increases the tool’s durability. The faster the cutting edge leaves the cutting zone, the lower the heat load and the higher the wear resistance of the cutters. In this regard, it is important to increase the speed and accuracy of movements of the working bodies of the machine. To implement the required characteristics when performing technological operations, it is proposed to use an AC electric drive system based on a valve motor with vector control and an information and measurement system containing variable sensors, which has better technical, economic and mass-dimensional indicators compared to other types of electric motors. The results of computer simulation of dynamic processes of regulating the speed and torque of a valve engine that provide the required dynamic torque and acceleration are presented. It is shown that an AC electric drive based on a valve motor provides the implementation of the required speed modes.

Modeling & Simulation of AC Electric Drive System to Cruise the Vehicle to the Prescribed Speed

Now a days about 90% of the loads are dynamic in nature, where loads are to be operate at different speed for different uses. In this paper, we are analyzing the design and structures of the control system for electric drive equipped with the permanent magnet synchronous motor (PMSM) in the automotive application. In this study, a simulation model of full electric vehicle on the MATLAB-SIMULINK platform is simulated, and components of electric vehicles were discussed. The drive train system components consist of a motor, battery, motor controller, inverter and vehicle interface are modeled according to their mathematical equations.