It is an electrical device that converts alternating current
(AC), which periodically reverses direction, to direct
current (DC), which flows in only one direction.
RECTIFIER
The
process is known as ______, since it “straightens”
the direction of current.
rectification
either the positive or negative half of
the AC wave is passed, while the other half is blocked.
Half-Wave Rectification
converts the whole of the input waveform
to one of constant polarity (positive or negative) at its output.
Full-Wave Rectification
converts both polarities of the input
waveform to DC (direct current), and is more efficient.
Full-Wave Rectification
The ______ of an alternating current is the maximum or
minimum voltage of a sinusoidal wave.
peak voltage
This is the value from positive peak to the negative peak
Peak-to-Peak Value
It is the value of a sinusoidal wave at any instant of time
Instantaneous Value
It is the arithmetic average of all the values in a sine
wave for one alternation or a half-cycle.
Average Value (VDC or VAVE)
The ___ value of a set of values (or a continuous time
waveform) is the square root of the arithmetic
mean (average) of the squares of the original values
Root-Mean-Square
or the square of the function that defines the
continuous waveform
Root-Mean-Square
another term for RMS
Effective Value
Value of an alternating voltage that is just as effective
as a steady dc voltage with the same value.
Effective Value
formula for Vdc/Vave (half wave)
Vdc = Vm/pi = 0.318Vm
formula for Vrms (half wave)
Vrms = Vm/2
formula for Vdc/Vave (full wave)
Vdc = Vave = 2Vm/pi = 0.636Vm
formula for Vrms (full wave)
Vrms = Vm/sqrt(2)
in half wave, PIV __ Vm
> or equal
in full wave using center-tapped transformer wave, PIV __ _Vm
> or equal 2Vm
in bridge type full wave rectifier, PIV __ Vm
> or equal
