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.
A permanent magnet dual mechanical port machine (DMPM) is a compact and pure electrical solution to the hybrid electric vehicle traction, which features as two independent rotors and permanent magnets mounted on the outer rotor. The key barrier prevent the DMPM from practical usage is the existence of the brush and slipring. A way to eliminate the brush and slipring is presented in this paper, which...
This paper reports efficiency improvement of a doubly salient-pole homopolar machine with powder iron core. Powder iron core is composed of the metal magnetization powder with resin. It has advantages of low cost, isotropic magnetic property for three dimensions, a high flexibility of design, and low eddy-current loss at high frequency. This paper shows characteristics and performance comparisons...
Hybrid excitation synchronous machine(HESM) combines the characteristics of permanent magnet machine and wound field synchronous machine. A novel coordinate structure HESM is proposed and implemented in this paper. The architecture and operation principle of the novel HESM are presented. To predict the electromagnetic performance more accurately, 3D-FEA model of the HESM is built, and finite-element...
A novel hybrid excitation synchronous generator (HESG) with tangential/radial magnetic path in parallel connection is proposed in this paper. The HESG combines the merits of permanent magnet synchronous generators and electric excitation synchronous generators. The structure characteristics of the HESG are described and the operation principle is introduced. The basic characteristics of the HESG are...
This paper deals with performance analysis of a permanent magnet generator (PMG) considering magnetic losses using d-q axis and equivalent circuit (EC) model based on analytical parameter estimation. Electrical parameters and magnetic power losses are estimated and calculated by analytical methods, respectively. Derived electrical parameters and magnetic losses are employed for the d-q axis and EC...
A known way to estimate the position of a switched reluctance motor without the use of a shaft position sensor is by excitation of a resonant circuit comprised by an idle motor phase winding and an external capacitor. This paper discusses the influence of the frequency of the sinusoidal excitation signal on the phase inductance. It is shown that the inductance decreases with increasing excitation...
This paper presents two types of hybrid excitation machines for electrical propulsion system such as hybrid electric vehicles and trains. In both machines, both permanent magnet and field coil excitation are employed and work harmoniously in order to provide them with superior field strengthening or weakening capability. The basic working principles of two machines are described. The performance predictions...
In this paper, we investigate the main factors of the stray load loss of cage induction motors from both results of the measurement and analysis. The losses generated at the rotor cage, stator and rotor cores are calculated by the finite element analysis, respectively. To consider the inter-bar current loss, which is produced by the eddy currents at the rotor core between the bars, the 3-D analysis...
The work described in this paper is Io investigate the additional losses and consequent temperature in core ends in a turbo-generator wound with cables. Electromagnetic calculations are made with 3D FE models, which include the lamination material with anisotropic properties both in magnetic permeability and electric conductivity. The models also include the geometry of the stator teeth and eventually...
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.