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elektroda.net NewsGroups Forum Index - Electronic for beginners - Convert half-wave rectified to AC?
John Fields
Guest
Guest
Tue Aug 02, 2011 11:49 pm
On Mon, 01 Aug 2011 08:07:28 -0700, John Larkin
<jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
Quote:
On Mon, 01 Aug 2011 02:16:21 -0500, John Fields
jfields_at_austininstruments.com> wrote:
On Sun, 31 Jul 2011 18:51:21 -0700, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
You recently criticized me - entirely incorrectly - for degrading
women and then using that degradation as an insult.
---
Well, from your past performances, one would hardly expect you to
accept criticism objectively so, without the proof to refute my past
criticism, your statement that my criticism was incorrect is entirely
hollow.
What a massive heap of lame words,
jfields_at_austininstruments.com> wrote:
On Sun, 31 Jul 2011 18:51:21 -0700, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
You recently criticized me - entirely incorrectly - for degrading
women and then using that degradation as an insult.
---
Well, from your past performances, one would hardly expect you to
accept criticism objectively so, without the proof to refute my past
criticism, your statement that my criticism was incorrect is entirely
hollow.
What a massive heap of lame words,
---
You didn't understand it then, huh?
---
Quote:
all to avoid discussing electronics.
---
Most of the time, when I post a circuit I want to discuss, (which is
hardly ever, since my bent is to supply solutions for querants'
problems) unless it's dead simple, I'll accompany the schematic with a
circuit description, just as a courtesy, in order to allow anyone
who's interested in the circuit to follow my thinking.
Your failing to do that indicates to me that you don't really want to
discuss the circuit, and all you want to do is grandstand.
Moreover, since the subject of this thread is about converting
half-wave rectified AC (pulsating DC) into AC, and the original body
further defined the reconstituted AC as suitable for driving a motor,
your sub-harmonic generator post is really off-topic.
Just more evidence of grandstanding, as evidenced by the fact that
you've never let being off-topic stand in the way of patting yourself
on the back.
--
JF
P E Schoen
Guest
Guest
Wed Aug 03, 2011 4:53 am
An even simpler circuit might be good enough for a motor. We may have lost
the OP, but I don't believe he really means to require the half wave diode.
It was probably just an example of an easy way to get 1/2 the voltage from a
common AC source, just as a simple diode lamp dimmer. The following circuit
merely adds a resistor load for the pulsing DC and a capacitor to remove
(most of) the DC component to the motor (which I simulate with an inductor).
Paul
=================================================
Version 4
SHEET 1 880 680
WIRE 160 96 64 96
WIRE 256 96 224 96
WIRE 288 96 256 96
WIRE 400 96 352 96
WIRE 64 144 64 96
WIRE 256 144 256 96
WIRE 400 144 400 96
WIRE 64 272 64 224
WIRE 256 272 256 224
WIRE 256 272 64 272
WIRE 400 272 400 224
WIRE 400 272 256 272
FLAG 64 272 0
SYMBOL voltage 64 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 172 60 0 0 0 60)
SYMBOL diode 160 112 R270
WINDOW 0 32 32 VTop 0
WINDOW 3 0 32 VBottom 0
SYMATTR InstName D1
SYMATTR Value MUR460
SYMBOL res 240 128 R0
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL cap 352 80 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 5000µ
SYMBOL ind 384 128 R0
SYMATTR InstName L1
SYMATTR Value 100m
TEXT 30 296 Left 0 !.tran 1 startup
Phil Allison
Guest
Guest
Wed Aug 03, 2011 5:28 am
"P E Schoen"
An even simpler circuit might be good enough for a motor. We may have lost
the OP, but I don't believe he really means to require the half wave diode.
It was probably just an example of an easy way to get 1/2 the voltage from a
common AC source, just as a simple diode lamp dimmer.
** The OP could even use a common, triac based, wall plate dimmer set to
about 1/3 duty cycle.
This will give 60 volts rms.
..... Phil
Winston
Guest
Guest
Wed Aug 03, 2011 5:47 am
P E Schoen wrote:
Quote:
An even simpler circuit might be good enough for a motor. We may have
lost the OP, but I don't believe he really means to require the half
wave diode. It was probably just an example of an easy way to get 1/2
the voltage from a common AC source, just as a simple diode lamp dimmer.
lost the OP, but I don't believe he really means to require the half
wave diode. It was probably just an example of an easy way to get 1/2
the voltage from a common AC source, just as a simple diode lamp dimmer.
I agree but without clarification from the OP, we're stuck with the
constraints and requirements in his post.
Quote:
The following circuit merely adds a resistor load for the pulsing DC and
a capacitor to remove (most of) the DC component to the motor (which I
simulate with an inductor).
Paul
a capacitor to remove (most of) the DC component to the motor (which I
simulate with an inductor).
Paul
That probably would work, though we'd be depending on back EMF
to clean up the waveforms.
It appears to be about 20% efficient and there'll probably
be vibration and power factor penalties to be paid due to the
very non-sinusoidal power into the motor.
The resonant transformer appears to provide somewhat better
efficiency and very sinewavey voltage and current.
Thanks, Paul.
--Winston
Phil Allison
Guest
Guest
Wed Aug 03, 2011 5:53 am
"Winston = Wanker "
Quote:
I agree but without clarification from the OP, we're stuck with the
constraints and requirements in his post.
** You are stuck with them.
The rest of us are not that fucking stupid.
..... Phil
John Larkin
Guest
Guest
Thu Aug 04, 2011 2:14 pm
On Tue, 02 Aug 2011 18:49:23 -0500, John Fields
<jfields_at_austininstruments.com> wrote:
Quote:
On Mon, 01 Aug 2011 08:07:28 -0700, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
On Mon, 01 Aug 2011 02:16:21 -0500, John Fields
jfields_at_austininstruments.com> wrote:
On Sun, 31 Jul 2011 18:51:21 -0700, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
You recently criticized me - entirely incorrectly - for degrading
women and then using that degradation as an insult.
---
Well, from your past performances, one would hardly expect you to
accept criticism objectively so, without the proof to refute my past
criticism, your statement that my criticism was incorrect is entirely
hollow.
What a massive heap of lame words,
---
You didn't understand it then, huh?
---
all to avoid discussing electronics.
---
Most of the time, when I post a circuit I want to discuss, (which is
hardly ever, since my bent is to supply solutions for querants'
problems) unless it's dead simple, I'll accompany the schematic with a
circuit description, just as a courtesy, in order to allow anyone
who's interested in the circuit to follow my thinking.
Your failing to do that indicates to me that you don't really want to
discuss the circuit, and all you want to do is grandstand.
Moreover, since the subject of this thread is about converting
half-wave rectified AC (pulsating DC) into AC, and the original body
further defined the reconstituted AC as suitable for driving a motor,
your sub-harmonic generator post is really off-topic.
Just more evidence of grandstanding, as evidenced by the fact that
you've never let being off-topic stand in the way of patting yourself
on the back.
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
On Mon, 01 Aug 2011 02:16:21 -0500, John Fields
jfields_at_austininstruments.com> wrote:
On Sun, 31 Jul 2011 18:51:21 -0700, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:
You recently criticized me - entirely incorrectly - for degrading
women and then using that degradation as an insult.
---
Well, from your past performances, one would hardly expect you to
accept criticism objectively so, without the proof to refute my past
criticism, your statement that my criticism was incorrect is entirely
hollow.
What a massive heap of lame words,
---
You didn't understand it then, huh?
---
all to avoid discussing electronics.
---
Most of the time, when I post a circuit I want to discuss, (which is
hardly ever, since my bent is to supply solutions for querants'
problems) unless it's dead simple, I'll accompany the schematic with a
circuit description, just as a courtesy, in order to allow anyone
who's interested in the circuit to follow my thinking.
Your failing to do that indicates to me that you don't really want to
discuss the circuit, and all you want to do is grandstand.
Moreover, since the subject of this thread is about converting
half-wave rectified AC (pulsating DC) into AC, and the original body
further defined the reconstituted AC as suitable for driving a motor,
your sub-harmonic generator post is really off-topic.
Just more evidence of grandstanding, as evidenced by the fact that
you've never let being off-topic stand in the way of patting yourself
on the back.
More blather.
John
Roberto Waltman
Guest
Guest
Mon Aug 08, 2011 9:38 pm
John Larkin wrote:
Quote:
The second rule is that they post the question and never return,
leaving the regulars to debate the issues for some weeks.
leaving the regulars to debate the issues for some weeks.
From past posts in other forums I believe Mr. "eromlignod" does not
have that modus operandi.
He may have been left behind on the far side of the Google divide...
--
Roberto Waltman
[ Please reply to the group.
Return address is invalid ]
Winston
Guest
Guest
Mon Aug 08, 2011 10:03 pm
Roberto Waltman wrote:
Quote:
John Larkin wrote:
The second rule is that they post the question and never return,
leaving the regulars to debate the issues for some weeks.
From past posts in other forums I believe Mr. "eromlignod" does not
have that modus operandi.
He may have been left behind on the far side of the Google divide...
The second rule is that they post the question and never return,
leaving the regulars to debate the issues for some weeks.
From past posts in other forums I believe Mr. "eromlignod" does not
have that modus operandi.
He may have been left behind on the far side of the Google divide...
Ah. That's too bad.
Based on his posts here, he appears to be a fine fellow,
even if he does spell 'dongilmore' strangely.
:)
--Winston
Rich Grise
Guest
Guest
Tue Aug 09, 2011 9:18 pm
Winston wrote:
Quote:
Roberto Waltman wrote:
John Larkin wrote:
The second rule is that they post the question and never return,
leaving the regulars to debate the issues for some weeks.
From past posts in other forums I believe Mr. "eromlignod" does not
have that modus operandi.
He may have been left behind on the far side of the Google divide...
Ah. That's too bad.
Based on his posts here, he appears to be a fine fellow,
even if he does spell 'dongilmore' strangely.
:)
But "Eromlignod" sounds so much more fun - it brings to mind castles
John Larkin wrote:
The second rule is that they post the question and never return,
leaving the regulars to debate the issues for some weeks.
From past posts in other forums I believe Mr. "eromlignod" does not
have that modus operandi.
He may have been left behind on the far side of the Google divide...
Ah. That's too bad.
Based on his posts here, he appears to be a fine fellow,
even if he does spell 'dongilmore' strangely.
:)
But "Eromlignod" sounds so much more fun - it brings to mind castles
and dragons and warrior princes an' shit. ;-)
Cheers!
Rich
Winston
Guest
Guest
Tue Aug 09, 2011 10:33 pm
Rich Grise wrote:
Quote:
Winston wrote:
Roberto Waltman wrote:
John Larkin wrote:
The second rule is that they post the question and never return,
leaving the regulars to debate the issues for some weeks.
From past posts in other forums I believe Mr. "eromlignod" does not
have that modus operandi.
He may have been left behind on the far side of the Google divide...
Ah. That's too bad.
Based on his posts here, he appears to be a fine fellow,
even if he does spell 'dongilmore' strangely.
:)
But "Eromlignod" sounds so much more fun - it brings to mind castles
and dragons and warrior princes an' shit.
Roberto Waltman wrote:
John Larkin wrote:
The second rule is that they post the question and never return,
leaving the regulars to debate the issues for some weeks.
From past posts in other forums I believe Mr. "eromlignod" does not
have that modus operandi.
He may have been left behind on the far side of the Google divide...
Ah. That's too bad.
Based on his posts here, he appears to be a fine fellow,
even if he does spell 'dongilmore' strangely.
:)
But "Eromlignod" sounds so much more fun - it brings to mind castles
and dragons and warrior princes an' shit.
I dub thee esirg of the hcir.
--notsniw <-- Ain't *that* the truth.
elektroda.net NewsGroups Forum Index - Electronic for beginners - Convert half-wave rectified to AC?
