Presentation on theme: "Transformers Test Friday 3/30/12. Electromagnetic Induction Induction is the process of producing (inducing) a voltage by passing a wire through a magnetic."— Presentation transcript:
AC voltages A transformer works with AC voltages, since the magnetic field must be changing to induce a voltage in the coils.
Transformer Designing a Transformer Frequency Voltage Power
Transformer Rating Transformer are rated in Volt-Amperes (VA) Volt Amperes are used to determine the Maximum Current the transformer can handle.
A transformer consists of two coils of wire wound around a core of soft iron.
N P N S The side connected to the input AC voltage source is called the primary and has N P turns.
N S The other side, called the secondary, is connected to a load and has N S turns.
Core The core is used to increase the magnetic flux and to provide a medium for the flux to pass from one coil to the other
Coefficient of Coupling The measure of how good the transformer is. Scale of 0 to 1 1 – All the magnetic Flux lines cut the Secondary Winding 0 – None of the magnetic Flux lines cut the Secondary Winding
Ch 12: AC Pages 122 – 128 Answer Question through Chapter Write down Questions and Answers AC Worksheets: 2-1 Lab 1: Book 2 “DC and AC” Problem Worksheets 4 Simulations – Computer Lab Due 3/26 th Test 3/26 th
Ch 18: Transformers Pages 168 – 174 Answer Question through Chapter Write down Questions and Answers Transformer Worksheets: Lab 2-14 Lab: 29 Old Book Problem Worksheets Video Worksheet – “Generating Electricity” Due 3/26 th Test 3/26 th