09-07-2013, 04:17 PM
PPT ON:TRANSFORMER
TRANSFORMER.pptx (Size: 1.65 MB / Downloads: 45)
TRANSFORMER USES
Impedance matching
Electrical Isolation
AC power transmission
STEP-UP Transformer
STEP-DOWN Transformer
HISTORY
1831 – Michael Faraday invented the Induction Ring.
1881 – Lucien Gaulard and John Gibbs exhibited a device called secondary generator.
1885 – William Stanley developed the fist commercially used practical device while working for Westinghouse Electric Company in US.
LOSSES
Transformers have losses and these losses must come into consideration.
Copper losses (I^2 R)
Leakage Flux losses
Core losses
Eddy currents
Hysteresis losses
VOLTAGE REGULATION
Voltage regulation (VR) is the ability of a system to provide near constant voltage over a wide range of load conditions. Also it compares the VO at no load to VO at full load.