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This paper proposes the sensorless control system of induction motor using the observer gain tuning and high frequency injection techniques. The high frequency injection is activated by the condition of observer gain k. The high frequency injection technique is based on magnetic saliencies caused by the saturation and high frequency injection.
This paper investigates the problem of single-phase induction motor (SPIM) sensorless speed control. A discrete time PI controller and a sensorless technique are implemented on a PC-based platform using a standard three-phase inverter drive and vector control. An indirect rotor flux oriented control technique is developed based on a sensorless technique. A MRAS with a Kalman filter algorithm is developed...
A method of detecting current using a single shunt resistor is required for motor-drive systems in home-electrical appliances to reduce the cost of inverters. This paper proposes a method of correcting the voltage reference vector by converting coordinates from a rotating reference frame into a fixed reference frame. It also proposes a new method of transforming coordinates that is appropriate for...
Based on the magnetic saliencies of a PM synchronous motor, it is possible to indirectly detect the position of the rotor by measuring only electric variables. This is the case of the sensorless or self-sensing methods. Even in motors with surface mounted magnets the magnetic saliencies are present due to the saturation that the rotor flux produces in the stator. In order to track these saliencies,...
In this paper, the stability of the current control system in a sensorless method based on the maximum torque control frame (MTCF) which we have proposed is described. First, the closed-loop transfer function of the current control system considering position errors on the MTCF is derived. Next, the influence of the position estimation error on parameter errors in the steady state is examined. Since...
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