05-02-2013, 02:33 PM
sinusoidal alternating waveform
[attachment=49704]
introduction
The analysis thus far has been limited to dc networks, networks in which the currents or voltages are fixed in magnitude except for transient effects.
Now analysis of networks in which the magnitude of the source varies in a set manner is done e.g. Alternating Current (AC).
The term alternating indicates only that the waveform alternates between two prescribed levels in a set time sequence.
Sinusoidal ac voltages
Sinusoidal ac voltages are available from a variety of sources.
◦An ac voltage is originated at a power plant; such a power plant fueled by water power, oil, gas, or nuclear fusion.
◦In each case an ac generator (also called an alternator) is the primary component in the energy conversion process.
Abdul
Definitions
◦Waveform: The path traced by a quantity, such as the voltage , plotted as a function of some variable such as time, position, degrees, radians, temperature, and so on.
◦Instantaneous value: The magnitude of a waveform at any instant of time; denoted by lowercase letters (e1, e2).
◦Peak amplitude: The maximum value of a waveform as measured from its average, or mean value, denoted by uppercase letters (such as Emfor sources of voltage and Vmfor the voltage drop across a load). For the waveform, the average value is zero volts, and Emis as defined by the figure.
Abdul
[attachment=49704]
introduction
The analysis thus far has been limited to dc networks, networks in which the currents or voltages are fixed in magnitude except for transient effects.
Now analysis of networks in which the magnitude of the source varies in a set manner is done e.g. Alternating Current (AC).
The term alternating indicates only that the waveform alternates between two prescribed levels in a set time sequence.
Sinusoidal ac voltages
Sinusoidal ac voltages are available from a variety of sources.
◦An ac voltage is originated at a power plant; such a power plant fueled by water power, oil, gas, or nuclear fusion.
◦In each case an ac generator (also called an alternator) is the primary component in the energy conversion process.
Abdul
Definitions
◦Waveform: The path traced by a quantity, such as the voltage , plotted as a function of some variable such as time, position, degrees, radians, temperature, and so on.
◦Instantaneous value: The magnitude of a waveform at any instant of time; denoted by lowercase letters (e1, e2).
◦Peak amplitude: The maximum value of a waveform as measured from its average, or mean value, denoted by uppercase letters (such as Emfor sources of voltage and Vmfor the voltage drop across a load). For the waveform, the average value is zero volts, and Emis as defined by the figure.
Abdul