Efficiency Of A Transformer
Due to the losses in a transformer, its output power is less than the input power. ∴ Power output = Power input…
Significance Of Back E.M.F. In Dc Motor
It is seen in the generation action, that when a conductor cuts the lines of flux, e.m.f. gets induced in the conductor.…
Open Circuit Test Or No-Load Test
Figure 1.35 Open Circuit Test From this test, we can determine core loss and no-load current (I0) of the transformer. Figure 1.35 shows…
All-Day Efficiency
The ratio of output in watts to input in watts is called commercial efficiency of a transformer. Distribution transformers are used for supplying lighting…
Separation Of Core (Or Iron) Losses In A Transformer
Hysteresis loss and eddy current loss are the components of the iron losses. For the applied fl ux density Bmax to the core, we…
Short Circuit Or Impedance Test
The main purpose of this test is to compute the following: Equivalent impedance of the transformer referred to primary and secondary. Cu…
Power Equation Of A D.C. Motor
The voltage equation of a d.c. motor is given by, V = Eb + Ia Ra Multiplying both sides of the above equation by…
Total Approximate Voltage Drop Of A Transformer
During no-load condition, induced voltages at the primary and secondary windings are equal to the applied voltage and secondary terminal voltage respectively.…
Transformer With Resistance And Leakage Reactance
Figure 1.30 shows a transformer having resistances R1 and R2 of primary and secondary windings respectively, and leakage reactances X1 and X2 of primary and secondary windings respectively. The primary…
Effect Of The Armature Reaction On Performance Of A D.C. Motor
The armature reaction is nothing but the effect of flux produced by armature conductors on the distribution of main flux due to…