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Circuit Model of DC Machine

Circuit Model of DC Machine: The parallel paths of DC machine armature are symmetrical and each has an induced emf Ea and a resistance Rp. The armature can be represented…

Forces in system with Permanent Magnets

Forces in system with Permanent Magnets: Method of finding Forces in system with Permanent Magnets is best illustrated by an example. Figure 4.17(b) shows a moving armature relay excited by…

Field Energy and Mechanical Force

Field Energy and Mechanical Force: Field Energy and Mechanical Force - Consider once again the attracted armature relay excited by an electric source as in Fig. 4.4. The field produces…

Choice of Transformer Connection Diagram

Choice of Transformer Connection Diagram: The different choice of Transformer Connection Diagram are namely, Star/star: This is economical for small HV transformers as it minimizes the turns/phase and winding insulation.…

Approximate Equivalent Circuit of Transformer

Approximate Equivalent Circuit of Transformer: Approximate Equivalent Circuit of Transformer - In constant frequency (50 Hz) power transformers, approximate forms of the exact T-circuit equivalent of the transformer are commonly…

Forced Cooling in Transformer

Forced Cooling in Transformer: Forced Cooling in Transformer - For transformer sizes beyond 5 MVA additional cooling would be needed which is achieved by supplementing the tank surface by a…

Integrated Circuits Articles

Integrated Circuits Articles: This Integrated Circuits Articles which includes the following topics: Integrated Circuit Definition Integrated Circuits Classification Basic Planar Process in IC Fabrication Vapour Phase Epitaxy Process Molecular Beam…

Define Permanent Magnet in Magnetic Circuits

Define Permanent Magnet in Magnetic Circuits: Define of Permanent Magnet is an important excitation source (life long) commonly employed for imparting energy to magnetic circuits used in rotating machines and…