Re: AC Voltage Reference
- From: John Larkin <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 22 Dec 2008 14:18:27 -0800
On Mon, 22 Dec 2008 13:53:12 -0800 (PST), Mio <MioTheGreat@xxxxxxxxx>
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?
Thanks
I've used a power audio amplifier and a step-up transformer to
generate stable 120 to 480 volts AC, for calibrating electric power
meters. The signal source should be stable, like a function generator
or a small benchtop ARB. I suppose you could do overall feedback, too,
if you really need a stiff output.
One rig we have is a Peavey 400 watt RMS/channel stereo amp, which we
modified to improve low-frequency response. One channel drives a
step-up transformer to simulate line voltage, and one steps down to
drive current transformers up to 200 amps. The signal source is a
home-made thing that uses a uP and a couple of dacs to generate
precise phase-controlled sine waves.
John
.
- References:
- AC Voltage Reference
- From: Mio
- AC Voltage Reference
- Prev by Date: Re: Why does arrow in N mosfet point towards channel?
- Next by Date: Re: AC Voltage Reference
- Previous by thread: Re: AC Voltage Reference
- Next by thread: Re: AC Voltage Reference
- Index(es):
Relevant Pages
|
