Abra AK-10, Руководство пользователя

Страница: 11 / 16

10
Rectifiers
Rectifiers convert AC signal into DC signal, DC signals are required for electronics devices that need
DC power to function. A power plant provides commercially three phase power, as in there are three
independent sine waves in a line at any given time with the same; amplitude, RMS, oscillation rate
of 60Hz and etcetera for north America. A common house hold receives a single phase power line or
in some cases older homes receive dual phase power. However in the end at the output of your wall
socket you will have a single phase power that will display one sine wave on your oscilloscope. The
rectifier for this circuit would be for a single phase rectifier. There are two types of rectifiers as they
will manipulate the output as either a full wave or half wave.
Full wave rectifiers
Full wave rectifiers convert the entire waveform into one constant polarity at the output, in essence
they convert the AC to a DC wave. In some sense a half wave rectifier will requires less components
than a full wave rectifier, the full wave rectifier has a higher average voltage than its counterpart
and smoother than the half wave rectifier. Observing the sine wave in AC section of the theory
chapter, sine wave was described as a wave in the ocean the negative peaks of the sine wave are
shifted upwards to create a constant positive voltage. This is achieved by placing diodes in a bridge
configuration.
Half wave rectifier
s
Half wave rectifiers eliminate the negative peaks leaving blank gaps in-between compared to the
full wave rectifier. Typical the components required for the half wave rectifiers is less than the full
wave. A half wave rectifier creates a lot of ripples and thus a better filter system is required.