CALCULATION OF THE LEAKAGE INDUCTANCE OF THE WINDING END PART OF AN ASYNCHRONIZED SYNCHRONOUS GENERATOR (ASG) BASED ON THE SCALAR POTENTIAL METHOD

Energetics. Electrical engineering
Authors:
KOCHETKOVA E.Y. LEBEDEVA A.A. MINEVICH T.G. Modulina A. N.
Abstract:

The construction of a three-dimensional calculation model of a magnetic field based on replacing the eddy field of currents with a potential field of magnetic charges is considered. The method allows introducing a generalized scalar potential in the calculation domain, including areas occupied by current. The proposed method allows taking into account the diversity and complexity of the design of an electrical device, which is shown by a practical example of constructing a quasi-potential model containing various types of fictitious magnetic charges replacing real currents. The model is formed to calculate the magnetic field generated by a section of the frontal part of the winding of an asynchronized synchronous generator. Numerical implementation of the problem of calculating the magnetic field is proposed to be performed by a variational method using the finite element method. Minimization of the functional is carried out on a set of values of the scalar magnetic potential at nodes that are vertices of volumetric elements. The results of the magnetic field calculation are supposed to be used for further calculation of the leakage inductance of the end parts of the rotor windings.