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This paper is the second presented in this conference dealing with permanent magnet synchronous machine model identification. Main purpose of the research introduced in this paper, besides to introduce a new parameter estimation method, was to investigate the cost function properties. Understanding shape and behaviour of the cost function helps the authors to select the appropriate identification...
A flux linkage estimation method for induction motor based on extended Kalman filter theory (EKF) is presented in this paper. In order to improve the accuracy of filtering, genetic algorithm (GA) is introduced to optimize the noise matrix, and also filtering parameters in EKF. Simulation results show that the flux observer with optimized filtering parameter has better estimation accuracy and dynamic...
In this paper, the sensorless control of the interior permanent magnet synchronous motors using the sliding mode and the binary observers are compared. Also, the structure of the above observers only uses the voltage equation. Since the parameters of the dynamic equation such as machine inertia or viscosity friction coefficient are not well known and these values can be easily changed during normal...
This paper describes an effective way to estimate state variables, such as motor speed and disturbance from visual signal by using a dual sampling rate observer. The dual sampling rate observer estimates the state variables at every DSP control period and corrects the estimation error at the instant that the measurement signal is detected. The effectiveness of the observer is verified through simulations...
The paper introduces a sensorless control method which is called high frequency (HF) injection for salient-pole permanent magnet synchronous motor (PMSM). High frequency signal injection means to inject three phase symmetric constant amplitude voltage into the stator of PMSM. If the rotor has saliency, the current magnetic field of HF voltage signal must be influenced by the modulating function of...
Long stator linear synchronous motors (LSLSM) are being used widely in many areas, for its high dynamic response, robustness and accuracy. But because linear structure increases the cost and complication of position sensor, speed sensorless control methods become more important for linear motor than rotary motor. The paper presents a modified estimation method to get velocity and position of mover...
Extended Kalman filter observer for the direct torque controlled permanent magnet synchronous motor drive is talked about, the estimation schemes for PMSM rotor initial position and rotate speed are obtained. Direct torque control is studied. The PMSM rotor initial position is indispensable to sensorless PMSM direct torque control systems. High frequency voltage signal is injected into stator winding...
Based on the detailed discussion of the basic principles and merits for stator core saturation method and sliding mode observer (SMO) method, a hybrid rotor position self-sensing approach is investigated by combining the two methods. To detect the initial rotor position, a method based on the magnetic saturation characteristic of the stator core is presented. To detect the rotor position at low speed...
A stator flux field oriented vector control design and implementation of sensorless three phase induction motor (IM) is presented in this paper. In proposed control scheme, the reference values of speed and stator flux are delivered to the nonlinear controller which consists of 5 separate PI controllers. A two level space vector modulation (SVM) inverter is employed to generate the required stator...
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