Flux Distribution in DC Machines On-Load and Overloads
- 1 September 1966
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Apparatus and Systems
- Vol. PAS-85 (9) , 960-967
- https://doi.org/10.1109/TPAS.1966.291719
Abstract
In this paper, a method is provided for finding the magnetic fields in dc machines on-load and overloads. Mathematically, the problem is that of solving a quasi-Poissonian equation through use of a modified relaxation method. The differential equations are first replaced by difference equations; this constitutes a set of algebraic equations which are solved by a procedure consisting of relaxation and block relaxation of the potentials, and of underrelaxing the reluctivities. Currents and nonlinearities caused by the saturation of the iron are fully considered. A flow chart of a computer program is given, and the procedure is applied for finding the fields in a 500-hp, 4-pole dc motor at rated load, at twice rated load, and at six-times rated load with a high-speed computer. Flux plots in the region between the commutating pole and the armature show the spread of the main pole flux into the commutating region at overloads.Keywords
This publication has 4 references indexed in Scilit:
- Nonlinear Theory of Salient Pole MachinesIEEE Transactions on Power Apparatus and Systems, 1966
- Flux Distribution in Saturated DC Machines at No-LoadIEEE Transactions on Power Apparatus and Systems, 1965
- Accelerated Convergence of Numerical Solution of Linear and Non-Linear Vector Field ProblemsThe Computer Journal, 1965
- The magnetic field of the dynamo-electric machineJournal of the Institution of Electrical Engineers, 1926