ece 201 circuit theory i1 determining dot markings
Post on 15-Jan-2016
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TRANSCRIPT
ECE 201 Circuit Theory I 1
Determining Dot Markings
ECE 201 Circuit Theory I 2
Arbitrarily Select One Terminal
• Mark with a dot
ECE 201 Circuit Theory I 3
Assign a Current to the Terminal
ECE 201 Circuit Theory I 4
Apply the Right-Hand Rule
• Determine the direction of magnetic field established by the current
ECE 201 Circuit Theory I 5
Pick one terminal of the second coil
• Assign a current into this terminal
ECE 201 Circuit Theory I 6
Apply the Right-Hand Rule
• Determine the direction of magnetic flux established by this current.
ECE 201 Circuit Theory I 7
Compare the directions of the fluxes
• If the fluxes have the same direction, place a dot at the terminal where the test current enters.
• If the fluxes have different directions, place a dot on the terminal where the test current leaves.
ECE 201 Circuit Theory I 8
Summary
ECE 201 Circuit Theory I 9
Let’s Try Some Examples
ECE 201 Circuit Theory I 10
ECE 201 Circuit Theory I 11
ECE 201 Circuit Theory I 12
ECE 201 Circuit Theory I 13