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 the design of a 12-teeth/14-pole permanent magnet synchronous machine with flux barriers in the stator for a geared drive concept utilized in the gondola of a Do 128-6 aircraft. The target drive efficiency of 95% is to be achieved and it refers to the specified mechanical power of 300 kW, which is demanded for 25 minutes during climbing. The speed was set to 13300 rpm. Due to the...
This paper proposes an electromagnetic design of an asymmetrical six-phase salient-pole synchronous generator for the aircraft power system. The generator is coupled to the aircraft engine and it is connected to 270V DC bus via a dual three-phase voltage source inverter. An electrical excitation current is fed to the rotor coil in order to produce the induced voltage in the stator windings. The external...
This paper describes analytical and simulation tools to analyze the effects of Open Switch Fault (OSF) and Open Phase Fault (OPF) on five-phase PMSM designed for aerospace applications. For such applications, the fault tolerance and the reliability of the drive (PMSM and the power converter) are important to take into account for design. The addressed work aims essentially to analyze the dynamic of...
This paper describes requirements and design principles of an electric motor for helicopter tail rotor application. The application demands high specific power and specific torque with little possibility to adopt a liquid cooling solution. The tail rotor shall also comply with severe safety requirements that directly affect the motor design. Volume and weight constraints make the design of the electrical...
Mechanical wear and stiction can be eliminated by using magnetic bearings instead of ball bearings in spacecraft reaction wheels. Accordingly, the lifetime of attitude control systems can be increased and a smooth torque can be achieved also at speed zero crossings. Moreover, the microvibration emission of the reaction wheels can be minimized and actively controlled. A further advantage of magnetically...
A DC-link capacitance estimation method is presented for a three-phase voltage-source converter. The measured phase currents and DC-link voltage of the converter are used in formulation of the input and output signals for the estimator. The estimator is based on the ordinary least squares method. The capacitance can be estimated during the startup of the converter or while the converter is in normal...
Over the last two decades, general purpose computer has become both increasingly powerful and affordable. This, in turn, has led to the emergence of highly sophisticated applications that not only enable high-fidelity simulation of dynamic systems but also automatic code generation for implementation in real time control of electric machine-drives. Today, electric drives, power electronic systems...
The current publication introduces an approach for obtaining parameters of a six phase double delta salient-pole synchronous machine, based on the standstill frequency response test. The described approach was verified by measurements on a automotive claw-pole alternator, done in a laboratory on a test bench.
Insulation condition monitoring is important in case of inverter-fed machines due to the high strains on the machine and especially on its winding insulation system. In particular in traction applications the usage of new emerging semiconductor technologies, which enable higher inverter switching frequencies and rapid voltage rises, transient overvoltages at the machine occur. The insulation system...
Electric vehicles are the most promising sustainable transport technology for solving the environmental, economic and social problems associated to the internal combustion engine vehicles. The research and development of new charging methods is necessary for a further integration of electric vehicles in transport sector. Inductive power transfer is the most promising technology for dynamic wireless...
This paper deals with a combination of an inductive based contactless energy transfer system and a data transfer from the primary side to the secondary side of this system. Therefore, an extension of a self-oscillating power electronics offering the possibility to change the capacity of the resonant circuit during energy transmission is presented. An additional switchable capacitor in the compensation...
In this paper a three-phase magnetic field system is studied, applied to a wireless power transfer. The research is directed not only to the distribution of the magnetic field but to optimize the energy transfer efficiency, and to reduce the electromagnetic field influence to the close environment. The development of the future intelligent transportation system depends on the electric mobility, namely,...
Wireless power transfer systems based on magnetic induction are usually modeled using the magneto-quasi-static approximation, and by neglecting skin effects and radiation losses. These assumptions imply that the extracted power can grow unlimitedly by increasing frequency or coil size. To bridge these gaps, this work proposes general expressions for the actual received power. In this work, we analyze...
The paper studies the impact of first and third current-harmonic repartition in a five-phase Permanent Magnet machine whose Electromotive Forces (emfs) have first and third harmonics of the same amplitude. With a five-phase machine, it is possible for the torque production to achieve independent controls of the first and third harmonics of currents by using a vector control in each one of the two...
The paper presents a method to estimate the rotor position, speed and load torque of the PMSM drive. The estimation is done using cascaded sliding mode observers (SMOs) and uses an extended dynamic model of the PMSM. A first SMO is constructed based on the current equations of the motor and estimates the EMFs; these are used to calculate the rotor position angle. The EMFs are also fed in a second...
The minimization or elimination of the use of rare earth magnets in electric motors has been recently recognized as a challenging problem due to the increased price and limited supply of rare earth magnetic materials. Before the emergence of new cost-effective magnetic materials with high properties, the development of rare-earth-free motors using ferrite magnets with improved motor topologies is...
In this paper, the generalized predictive control (GPC) algorithm is introduced to control the position of a permanent magnet synchronous motor (PMSM). For this aim, the CARIMA model of PMSM is derived and the theoretical basics of multivariable GPC are described. In order to reduce computational burden, the GPC algorithm is extended by approach of using Laguerre functions. In conclusion, the HiL...
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.