Derivation
Subject and UNIT: Electrical and Instrumentation Engineering: Unit I: Transformer
Voltage applied to primary is alternating in nature, so the flux established also alternating one.
Subject and UNIT: Electrical and Instrumentation Engineering: Unit I: Transformer
An ideal transformer is one which has no losses i.e., its windings have no ohmic resistance, there is no magnetic leakage and hence it does not have I2R and core losses. In other words, an ideal transformer consists of two purely inductive coils wound on a loss-free core.
Components, Working Principle
Subject and UNIT: Electrical and Instrumentation Engineering: Unit I: Transformer
Main Components of Transformers are: i. Magnetic Core, ii. Windings, iii. Insulation for Windings, iv. Conservator (or) Tank, v. Cooling arrangement, Temperature Gauge, Oil Gauge, vi. Buchholz relay, vii. Silica gel breather, viii. Bushings (either of porcelain, oil-filled or capacitor type).
Subject and UNIT: Electrical and Instrumentation Engineering: Unit I: Transformer
Transformers are classified on the basis of: (i) Based on Duty they Perform, (ii) Based on Construction, (iii) Based on Voltage Output, (iv) Based on Applications, (v) Based on Cooling, (vi) Input Supply
Subject and UNIT: Electrical and Instrumentation Engineering: Unit I: Transformer Electrical Engineering
Whenever the primary winding is connected to an a.c source an exciting current flows through the primary winding. Since the current is alternating, it will produce an alternating flux in the core which will be linked by both primary and secondary windings.
Subject and UNIT: Electrical and Instrumentation Engineering: Unit I: Transformer
A transformer is a static electrical device, which does not having any moving parts. It transfers electric power from one circuit to another circuit without changing the frequency.