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.
This paper proposes a FDI strategy using high gain observers. Observers are often necessary for control purpose. It is possible to extend their application to disturbance estimation and FDI strategy. The observer is designed for a performance study on an induction motor in the framework of a specific induction motor Fault Diagnosis Benchmark.
In this paper two operating modes available for permanent magnet synchronous machines (PMSM) are presented. This study aims to increase the efficiency of the motor-pump system. The PMSM is driven at variable speed and the inverter is controlled by space vector modulation theory. This study allows changing the component that produces magnetic flux (id), while the torque current component of PMSM (i...
Controlling an induction machine has been a difficult task since its invention, especially at low speed operation and during highly dynamic regimes, where the required torque/speed changes constantly. This paper aims to present the validation and implementation of a deadbeat direct torque and flux control scheme (DB-DTFC) for induction machines on a multilevel platform consisting on an FPGA, a real...
In this paper, a novel method for predicting the torque-speed characteristics of salient-pole synchronous machines (SPSM) is presented. These characteristics are commonly used as the basis for evaluating drives with variable operating ranges, e.g. traction drives for electric and hybrid electric vehicles. Such vehicles are often powered by permanent magnet synchronous machines (PMSM) which contain...
This paper deals with a simple voltage model resistance estimator for predictive torque control (PTC) based induction motor (IM) drive. In PTC, flux and torque are predicted to select an optimal voltage vector to be applied to the motor by actuating a predefined cost function. Conventional PTC based control schemes provide poor performance in the very low operating frequencies when the stator flux...
A vector controlled-switched reluctance motor (SRM) drive system is proposed in this paper. As the unipolar excitation current, the sinusoidal current with a DC offset is applied to each circuit in the proposed technique. The excitation current consists of the DC and AC components. These components generate the (virtual) rotor flux and rotating stator field, hence, the vector control system for the...
This paper deals with field-oriented control (FOC) and vector control (VC) of a promising brushless doubly-fed reluctance generator (BDFRG) technology for large-scale wind turbines. The BDFRG has been receiving increasing attention because of the low operation & maintenance costs afforded by the use of partially-rated power electronics, and the high reliability of brushless construction, while...
This paper presents a detailed comparative evaluation of several direct torque control (DTC) strategies for permanent magnet synchronous machines (PMSMs), namely basic DTC, model predictive DTC (MPDTC) and DTC with duty ratio modulation (DTC-duty). Moreover, field orient control (FOC) is also included in this study. The aforementioned control strategies are reviewed and their performances are analyzed...
The efficiency of a motor drive combined with an inverter increases by exploiting the maximum voltage level that can be provided by the inverter. This paper presents a novel control strategy for permanent magnet synchronous machines in the field-weakening range. The inverter's voltage margin is utilised completely using only the variation of the torque angle and avoiding any zero voltage vectors in...
In this work the design and control of a four-phase induction machine (4P-IM) is addressed. The 4P-IM is controlled using a four-phase voltage source inverter (4P-VSI) with a generalization of the classic direct torque control (DTC) scheme. An analysis of the available valid switching states and voltage space vectors is developed and a switching table is obtained. Finally, the system's fault tolerant...
A continuous set nonlinear model predictive control (CS-NMPC) for a permanent-magnet synchronous machine (PMSM) is proposed. With an effective cost function optimization algorithm, the output voltage vectors are continuous. Compared with finite set model predictive control (FS-MPC), CS-NMPC can decrease the current and torque ripple dramatically, and have the same dynamic performance. Furthermore,...
This paper deals with model predictive control of five phase permanent magnet motors. Using motor model, the stator currents are estimated for the following modulation period, and the required voltages are applied to minimize the current errors. A comparison between the proposed algorithm and conventional cascade PI configuration is conducted.
This study is dealt with fault tolerant control of five phase permanent magnet (PM) machines. The main objectives are to increase the output power while eliminating the generated torque ripples. As a new aspect, the effect of available neutral connection is evaluated on the output power and torque ripples.
The advancements in power electronics and real-time control play a significant role in the global industrialization and energy conservation trends of the 21st century. These developments are increasing the use of electrical machines in various applications. In this paper, the Dual Direct Torque Control (DDTC) associated with space vector modulation (SVM) is developed for a Doubly Fed Induction Machine...
In this study, a three-phase induction motor drive using field-oriented vector controlled algorithm was designed and implemented. Sensorless speed control was achieved via vector control. The control algorithm was carried out using real-time application. The experimental results showing the operation of the system in continuous and transient regimes are presented with the practical results of the...
By principle, Direct Torque Control (DTC) is used to adjust stator flux and electromagnetic torque. Simple structure and very good dynamic behavior are main features of DTC. However classical DTC has some disadvantages, the most important of them is the high ripple torque. In this paper we propose some variety of DTC combined with FOC structures. Hysteresis controllers and switching table are replaced...
Conventional direct torque control (DTC) for permanent magnet synchronous motor (PMSM) has some shortcoming of more torque fluctuation, current fluctuation and inconstant switching frequency. Through an analysis of surface mounted permanent magnet synchronous motor (SPMSM), a new DTC-SVM (space vector modulation) method with a flux observer based on rotor position and current model, fast reference...
This contribution introduces an optimal control for wounded rotor salient pole synchronous motor intended for a new mining machine drive. The optimum considers demand for maximum torque of the motor. Hence the main idea is to find optimal values of stator flux current Isd and rotor field excitation current If to achieve maximum available torque of the machine. This contribution describes proposed...
This paper deals with optimum design criteria to minimize the torque ripple of a concentrated winding Synchronous Reluctance Motor (CW-SynRM) using Response Surface Methodology (RSM).
In this paper, a nonlinear control-oriented model of the hybrid synchronous machine is developed using the dq-axis transformation. A flatness-based multi-variable controller is proposed to track a predefined reference trajectory for the angular velocity. Furthermore, a comparison is made for two alternative observer designs. In the first case, a combination of a gain-scheduled Luenberger-type state...
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.