The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Current derivative based sensorless control methods, which falls under saliency tracking technique, is a promising new sensorless control methods for AC machines over a wide speed range, including zero speed. This method requires accurate current derivative measurement under different applied PWM voltage vectors. The accuracy of current derivative is affected by the high frequency oscillations which...
This paper proposes a novel technique to estimate online the inductances of a Permanent Magnet Synchronous Machine (PMSM) based on the measurement of the current derivatives excited by two active-voltage vectors and one zero-voltage vector within a PWM cycle. The d- and q-axes inductances of PMSMs are calculated during normal operation of the drive system. The influence of the magnetic saturation...
This paper presents a sensorless control method for IPMSMS drives over a wide speed range operation, including zero speed. The rotor position estimation of this method is based on relating the measured current derivative response which excited from fundamental PWM sequences to the incremental inductance. Compared to other saliency tracking sensorless control schemes, this method doesn't require additional...
This paper proposes a simplified Fundamental PWM Excitation (FPE) sensorless control method on IPMSMS direct torque control drives. This method is based on a five-segment PWM and the measurement of two active voltage vectors and one zero voltage vector during the first half of each PWM modulation cycle in order to obtain di/dts and estimate the rotor position therefrom. Compared to the conventional...
This paper proposes a sensorless control technique for an Interior Permanent Magnet Synchronous Motor (IPMSM) based on the fundamental Pulse Width Modulation (PWM) excitation over a wide speed range. The method employs the measurement of the current derivatives at one inactive voltage vector and one active voltage vector during each PWM cycle. The rotor position and speed is estimated at PWM frequency...
This paper proposes a Simulated Annealing based Global Maximum Power Point Tracking (GMPPT) technique designed for photovoltaic (PV) systems which experience partial shading conditions (PSC). The proposed technique is compared with the common Perturb and Observe MPPT technique and the Particle Swarm Optimization approach to GMPPT. The performance is assessed by considering the time taken to converge...
This paper investigates the analytical models of Conduction and Switching Losses (CASLs) of the three-phase ac-dc matrix rectifier. An analytical model of CASLs is obtained through the examination of operating principles for three-phase ac-dc matrix rectifier. The effectiveness of the models has been experimentally verified.
This paper presents a sensorless direct torque control method for matrix converter fed interior permanent magnet synchronous machine. The matrix converter is split into rectifier and inverter stages based on the Indirect Space Vector Modulation theory. Therefore, the hysteresis flux and torque control is achieved by selecting one of the six active and two zero voltage vectors in the inverter stage...
This paper presents a modified direct torque control scheme for matrix converter drives. This method allows a reduction of the harmonic content of the input current without any negative effect on the drive performance and its simplicity. By using two switching configurations at each cycle, the synthesis of the input current vector is more accurate than the previous method at the same sampling period,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.