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.
In the paper the design of an IPMSG for small wind turbines is presented. Based on classical construction of induction motor (IM), the internal permanent magnet generator (IPMG) was projected. Parameterization and sweep analysis of the rotor geometry was done in the finite element analysis (FEA) software, to obtain the maximum back electromotive force (BEMF). Based on this analysis, one case was chosen...
In the paper the analysis of the Fault Tolerant Control (FTC) of Induction Motor drive system is presented. The Direct Field Oriented Control was used for analysis the speed sensor faults detection systems based on the simple mathematical relationship with two types of the rotor speed estimators. In the diagnostic systems and in the post faulted conditions the MRASCC and NFO observers were used. Simulation...
This paper experimentally confirms the operation of a new concept magnetization reversal motor. The motor uses conventional PM rotor, however, the stator is consist of small coercive force magnet for the stator teeth and the winding which magnetizes and demagnetizes the magnet. The magnet in the stator is magnetized by the pulse current injected at stator coil. Therefore, the stator can generate alternating...
The paper proposes an experimental methodology for measurement of forces acting on the rotor under special operational conditions. The influence of static eccentricity with different load applied on the rotor is investigated. The paper also describes all necessary motor construction modifications and the procedure of preliminary measuring system calibration.
The authors of this paper suggest a mathematical model of a vessel diesel-generator installation meeting in larger extent the specific properties of such system and its application. A distinctive feature of the method under consideration is the use of the synchronous generator itself as a precise multifunctional sensor of the diagnostic information. The paper is also presenting the results of practical...
In this paper a novel axial-flux segmented rotor switched reluctance motor (AFSSRM) with a stator sandwiched by two rotors with a particular form of the segments is presented. The machine has magnetic short paths with no flux reversal and the active magnetic parts are made of soft magnetic composites. An in-wheel AFSSRM, specially intended for direct drive of light motorcycles, is designed. Electromagnetic...
In this paper an application of artificial neural controller for compensation of torque ripple in electrical drive with PMSM (Permanent Magnet Synchronous Motor) is presented. Due to cogging torque, electromagnetic torque ripple and also, current measurement error of the motor, are created a ripple of angular velocity, finally. This parasite phenomenon influence on the precision of control, especially...
This paper is focused on the analysis of the geometrical deviation of a variable reluctance (VR) resolver and its impact to the inverter losses for automotive applications. Therefore a VR resolver model is introduced, verified with measurements at a sensor test bench and the additional inverter losses are investigated.
This paper presents a special two-phase transverse flux machine with disc rotor. Because of the noncomplex construction and by using simple 2D flux path and 3D printing methods the manufacturing costs are hold low. A design criterion is proposed for maximizing the torque density in the low speed range. To prove the concept and analyse the potential of this construction a first direct driven prototype...
Motor current measurement techniques as well as predictive control algorithms for electric drives rely on an assumption of linear motor currents changes resulting from constant inverter output voltages. Recent research has reported that this assumption does not hold in motors with short electrical time constant, and in drives whose rotor position advances substantially during a control period. This...
Direct torque control (DTC), which is one type of PMSM drive system, can realize maximum-torque-per-ampere (MTPA) control and flux-weakening control by yielding an optimum target magnetic flux. In this paper, we propose armature reaction flux control that can achieve flux weakening control for PMSM control systems using DTC. Our proposed control focuses on the equivalence of the reactive power, which...
This paper will present different modulation schemes for optimizing the efficiency of low-voltage traction drives. The converter of the vehicle automatically has to select the most suitable modulation or control scheme depending on the present operating point in order to maximize the efficiency of the complete drive train. Furthermore, the functional principles and algorithms of the individual modulation...
Traditionally, active magnetic levitation systems in rotor applications comprise separate motor for torque production, two or more radial active magnetic bearings (AMBs) and one axial AMB. Such an arrangement produces long rotors. Resulting AMB-rotor systems are often supercritical making the levitation control challenging. The centralization of the torque and force producing actuators shortens the...
Electric motors for traction applications are traditionally designed with internal rotors. However, torque density can be increased with the rotor in the outside. Two permanent magnet synchronous machines (PMSM) with fractional slot concentrated windings (FSCW) and internal and external rotors, designed with same electromagnetic properties and volume restrictions, are compared to prove which one gives...
Individual pitch control is seen as a promising control technique for load reduction of the rotor blades in megawatt wind turbines. As the rotor blades are getting bigger and bigger, the asymmetric loads due to wind speed variations across the rotor area are increasing, too. Modern wind turbines include individual pitch actuators for every blade and the control effort is also reasonable. This is why...
This paper presents a sensorless starting procedure for a soft starter driven IE4 direct on line permanent magnet synchronous motor (PMSM). First, the initial position of the rotor is determined using a pulsating current space vector. Subsequently, the motor is started from standstill by the soft starter from a known position. The following firing sequences are calculated on the basis of the flux...
The output torque of switched reluctance motor (SRM) can be controlled by flowing an appropriate current through the armature windings. In general, current hysteresis control has been applied. However, there is a problem that acoustic noise generated from the SRM at the driving tends to become large. Then, there are reports that PWM control has been applied to suppress the acoustic noise. This paper...
This paper analyzes the unbalance problem of a standalone cascaded doubly-fed induction generator feeding unbalanced three-phase load. Under this working condition, the output voltages become un-balanced and give rise to a negative sequence component. The classic vector control strategy does not provide the desired performance. A compensation method is proposed to balance the stator voltages. The...
This paper proposes Fault Detection, Isolation and Reconfiguration (FDIR) techniques to realize the connection of a DFIM pumped storage system with the grid in the presence of current and speed sensor failures. For the detection method authors use the parity space approach either for current sensor failure or the rotation speed one. The proposed reconfiguration techniques exploit stator flux estimation...
The objective of this paper is to analyze a novel high-speed integrated motor-compressor drive system and investigate the opportunities by using gallium nitride (GaN)-based inverters. The proposed integrated motor-compressor is a combination of electric machine and axial-flow compressor by shaping the rotor pole of the electric machine into airfoils. Hence, the proposed integrated motor-compressor...
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.