ENB205 Lecture Notes - Lecture 4: Inductance, Computer Engineering, Phasor
Document Summary
The electric power for household and industry is in the form of sinusoidal voltages and currents. All periodic signals can be represented by means of superposition of various sinusoidal signals of different amplitudes, phases and frequencies. Average value over a period of time: this provides no information about the amplitude. Takes into account the fluctuations of the singal about its average value. It offers computational advantages, especially when dealing with power. Example find the aerage rms values of x1 and x2. The results only tell you the dc offset. The rms value of a sine function is equal to of its peak value. Borrow" ideas of complex numbers to represent phasor diagrams, make computation and circuit analysis easier. Note: j is used instead of j in electrical engineering. J is included in the rectangular form to distinguish between the real and imaginary axis. The terms real and imaginary are related only to mathematical definition.
