Transformer Voltage Ratio
The voltage of the windings in a transformer is directly proportional to the number of turns on the coils. This relationship is expressed in below Equation. where VP = voltage…
Transformer Theory of Operation
A transformer works on the principle that energy can be transferred by magnetic induction from one set of coils to another set by means of a varying magnetic flux. The…
Transformer Efficiency
Efficiency of a transformer is the ratio of the power output to the power input, as illustrated by Equation. where PS = power of secondary PP = power of primary…
Transformer Impedance Ratio
Maximum power is transferred from one circuit to another through a transformer when the impedances are equal, or matched. A transformer winding constructed with a definite turns ratio can perform…
Transformer Turns Ratio
Each winding of a transformer contains a certain number of turns of wire. The turns ratio is defined as the ratio of turns of wire in the primary winding to…
Transformer Mutual Induction
If flux lines from the expanding and contracting magnetic field of one coil cut the windings of another nearby coil, a voltage will be induced in that coil. The inducing…
Starting a Synchronous Motor
A synchronous motor may be started by a DC motor on a common shaft. When the motor is brought to synchronous speed, AC current is applied to the stator windings.…
Synchronous Motors
Synchronous motors are like induction motors in that they both have stator windings that produce a rotating magnetic field. Unlike an induction motor, the synchronous motor is excited by an…
Single Phase AC Induction Motors
If two stator windings of unequal impedance are spaced 90 electrical degrees apart and connected in parallel to a single-phase source, the field produced will appear to rotate. This is…
Induction Motor
Induction Motor Previous explanations of the operation of an AC motor dealt with induction motors. The induction motor is the most commonly used AC motor in industrial applications because of…
