Innovative developments for automated assembly and fixation of integrated permanent magnets in rotors of synchronous machines

2015 ◽  
Author(s):  
A. Mahr ◽  
A. Meyer ◽  
B. Hofmann ◽  
M. Masuch ◽  
J. Franke
Keyword(s):  
Permanent Magnets ◽  
Synchronous Machines ◽  
Automated Assembly

Demagnetization Analysis of Additional Permanent Magnets in Salient-Pole Synchronous Machines With Damper Bars Under Sudden Short Circuits

2012 ◽  
Vol 59 (6) ◽  
pp. 2448-2456 ◽  
Author(s):  
Tatsuya Hosoi ◽  
Hiroya Watanabe ◽  
Kazuo Shima ◽  
Tadashi Fukami ◽  
Ryoichi Hanaoka ◽  
...  
Keyword(s):  
Permanent Magnets ◽  
Synchronous Machines ◽  
Salient Pole ◽  
Short Circuits

scholarly journals Permanent Magnets Aging in Variable Flux Permanent Magnet Synchronous Machines

2020 ◽  
Vol 56 (3) ◽  
pp. 2462-2471
Author(s):  
Daniel Fernandez ◽  
Maria Martinez ◽  
David Reigosa ◽  
Juan M. Guerrero ◽  
Carlos Manuel Suarez Alvarez ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnets ◽  
Synchronous Machines ◽  
Permanent Magnet Synchronous Machines ◽  
Variable Flux

scholarly journals Development and Laboratory Testing of a Self-Excited Synchronous Machines without Permanent Magnets

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3966
Author(s):  
Fabrizio Marignetti ◽  
Roberto Luigi Di Stefano ◽  
Guido Rubino ◽  
Paolo Conti
Keyword(s):  
Laboratory Testing ◽  
Permanent Magnets ◽  
Experimental Tests ◽  
Motive Force ◽  
Synchronous Machines ◽  
Electrical Machinery ◽  
Space Harmonics ◽  
Force Components ◽  
Economic Construction ◽  
The Mathematical Model

Today, self-excited synchronous machines are the object of increasing interest because they use neither brushes nor permanent magnets. In fact, the price of rare earth metals is considerably high and still raising. This is the main reason why researchers are looking for suitable alternatives to permanent magnets in the construction of rotating electrical machinery. This paper deals with the design and laboratory testing of a synchronous machine with an efficient layout and an economic construction. The proposed self-excited machine exploits the space harmonics of the magneto-motive force to produce the excitation field. The model analysis is based on the computation of the back EMFs that are associated to the magneto motive force components. The mathematical model suggests an easy way to decouple the rotor windings. The machine has been built and experimental tests have been performed in order to validate the electrical behavior.

scholarly journals An Analytical Method for Generating Determined Torque Ripple in Synchronous Machines with Surface Magnets by Harmonic Current Injection

Machines ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 32 ◽  
Author(s):  
Matthias Vollat ◽  
Daniel Hartmann ◽  
Frank Gauterin
Keyword(s):  
Analytical Method ◽  
Electromotive Force ◽  
Permanent Magnets ◽  
Equation System ◽  
Torque Ripple ◽  
Synchronous Machines ◽  
Linear System Of Equations ◽  
Harmonic Currents ◽  
Asymmetrical Power ◽  
Phase Angles

In this paper, we present a new analytical method to calculate the required amplitudes and phase angles of the injected harmonic currents, to generate a determined torque ripple for synchronous machines with surface-mounted permanent magnets. First, we described the machine equations as a function of the phase current and the back electromotive force. We then introduced a new asymmetrical power system. After combining the equations, we established a linear system of equations. The solution of the equation system yielded the amplitudes and phase angles of the harmonic currents to be injected. Finally, we validated the method with several finite element method simulations. With this method, a previously defined torque ripple could be generated very accurately for synchronous machines with surface magnets.

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