Armature Reaction In Dc Machines Pdf Free
Due to saturation in the pole shoe, the increase in flux density may be less than the reduction in the flux density in remaining section of the pole shoe. The other component is the magnetic field (magnetic flux) in the air-gap, which the armature interacts with, thus the field component can comprise either permanent magnets, or electromagnets formed by a conducting coil, such as another armature (i.e., Doubly-fed electric machine). Brushless DC Motors. Thomson Delmar Learning. Basic Electricity. To reduce the adverse effects mentioned above and to improve the machines performance, following methods are used: Brush Shift A natural solution to the problem appears to shift the brushes along the direction of rotation in generator action and against the direction of rotation in motor action, this would result into a reduction in air gap flux. In an induction generator, these distinctions are blurred, since the generated power is drawn from the stator, which would normally be considered the field.
Armature reaction effects the normal operation of DC Generator in many ways. Torque Equation of DC Motor. References. Surge Impedance Loading or SIL. ^ "Basic AC electrical generators" (PDF). Armature reaction drop is the effect of a magnetic field on the distribution of the flux under main poles of a generator.. Types of DC Motor Separately Excited Shunt Series Compound DC Motor. Authority control NDL: 00561363 . This topic is focused on one particular aspect of DC Generator. Electrical Armature: The power-producing component of an alternator, generator, dynamo or motor.
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