Re: AC Voltage Reference
- From: "Paul Hovnanian P.E." <paul@xxxxxxxxxxxxx>
- Date: Mon, 22 Dec 2008 17:05:52 -0800
Mio wrote:
Hello all,
I'm trying to think of a good way to get a precise AC voltage (224VAC)
out of line voltage.
Thus far, I've thought of the following options:
Use a decent DC power supply, and buy an inverter. From the inverter,
use a 120/224 transformer (I can wind this myself) From what I saw,
most cheap inverters have crappy voltage regulation, though.
Use a decent DC power supply, and build an inverter. I've never built
an inverter, but I understand the theory behind them.
Use a constant voltage transformer, and hook it up to a 240/224
transformer. CVTs seem very expensive, though. So I don't really like
this.
Use something like an ac/ac chopper motor drive, sample voltage and
adjust the regulator with a microcontroller or comparator. I'm the
least sure about this method.
I'm looking for +-1%. Any other ideas? Any of these really stupid?
RMS? Peak? Limits on harmonics/THD? There's a lot more to defining
precision for an AC voltage than one number.
The problem will be compounded by the type of load(s) you are driving.
Anything rectified can present a highly nonlinear load to your supply,
distorting its waveform. Unless this is taken into consideration in your
inverter design (which is a non-trivial problem).
--
Paul Hovnanian mailto:Paul@xxxxxxxxxxxxx
------------------------------------------------------------------
The only tools one needs in life:
WD-40 to make things go and duct tape to make them stop.
.
- References:
- AC Voltage Reference
- From: Mio
- AC Voltage Reference
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