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Re: 180 BPS synch? (fwd)
---------- Forwarded message ----------
Date: Mon, 16 Jul 2007 17:52:51 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 180 BPS synch? (fwd)
Hi DC,
It operates on single phase input and outputs 3 phase. It's an inverter
with bells and whistles.
Take care,
Bart
Tesla list wrote:
>---------- Forwarded message ----------
>Date: Sat, 14 Jul 2007 13:31:53 -0500
>From: resonance <resonance@xxxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: 180 BPS synch? (fwd)
>
>
>
>Does the VFD produce the 3 phase while operating off a single phase, 220
>volts input, or do you have 3 phase at your home?
>
>
>Dr. Resonance
>Resonance Research Corp.
>www.resonanceresearch.com
>
>
>----- Original Message -----
>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: <tesla@xxxxxxxxxx>
>Sent: Saturday, July 14, 2007 7:57 AM
>Subject: Re: 180 BPS synch? (fwd)
>
>
>
>
>>---------- Forwarded message ----------
>>Date: Fri, 13 Jul 2007 22:42:47 -0700
>>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>>To: Tesla list <tesla@xxxxxxxxxx>
>>Subject: Re: 180 BPS synch? (fwd)
>>
>>Hi Scott,
>>
>>My VFD is pretty darn standard. I insert 220 VAC (or 240, whatever)
>>single phase. The output of the VFD is 3-phase which is cabled directly
>>to a 2HP 3-phase motor. The output is 230 VAC 3-phase. T1, T2, T3, and
>>Ground (4-wires). The VFD does happen to be controlled by a PLC, but
>>this is not necessary. The only reason I use a PLC is to incorporate
>>safety's into my control. The VFD outputs an error signal if something
>>freaks out. The PLC detects the error and shuts down the coil. There are
>>a few other misc. features which includes a low voltage dead man switch,
>>cabinet safety's, alarm signals, etc... That's all PLC crap.
>>
>>The VFD itself is wired up to accept a 0 to 10mA signal that controls
>>the speed from 0 to 500 Hz. I have a 10k ohm pot mounted to the control
>>panel which serves to adjust the speed control. In the past, I have also
>>ran the VFD with a binary input for 16 preset speeds. The speeds are
>>simply entered into the VFD with the VFD pushbutton controls ( set the
>>Hz of each speed). The rotary switch then selects a binary input and
>>tells the VFD to run at SP2, SP5, SP10, (whatever). That was fine, but I
>>find the pot variable adjustment the best for coils.
>>
>>I use an Altivar 31 VFD by Telemecanique. Telemecanique was once known
>>as "not the greatest of VFDs". That has changed in the past 4 years. The
>>company actually was revamped. Nowadays, their drives are probably the
>>easiest to use and are now very reliable. Especially the Altivar 31
>>series (versus the old Altivar 28 which was pure Telemecanique of old).
>>
>>3-phase motors are the most efficient of motors and VFD's allow us to
>>use them. They are capable of forward, reverse, and variable speeds.
>>Most elevators use them to get you to floor 99 and down to the basement.
>>Isn't it interesting how smooth elevators are and when they reach a
>>particular floor, you can "feel" them slow to a perfect stop. That is
>>"all VFD" control. But elevators are simply 1 in 1000 applications. When
>>it comes to motor control, 3-phase is industry standard and VFD's are
>>their industry standard control module. In motor control, Allen Bradley
>>is still top of line for VFD's. But the others now are right there with
>>them in capability. The main difference is that industries are tied into
>>a particular breed by the code they write. It would be an expensive task
>>to change over to something else. So, they stick with what they are
>>familiar with. I do the same. I understand that situation completely.
>>
>>Take care,
>>Bart
>>
>>
>>Tesla list wrote:
>>
>>
>>
>>>---------- Forwarded message ----------
>>>Date: Sat, 14 Jul 2007 00:36:54 -0400
>>>From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
>>>To: tesla@xxxxxxxxxx
>>>Subject: Re: 180 BPS synch? (fwd)
>>>
>>>Bart,
>>> How exactly does your VFD work, is it some kind of PLC controlled
>>>motor? I originally intended to build an asynch, with a variable speed
>>>motor, but my particular motor was not up to the task (it wouldn't keep
>>>turning when the coil was turned on, I still am not absolutely sure why, I
>>>have theories though). It was simply a vacuum cleaner motor attached to a
>>>dimmer switch, worked great when the power to the tank was turned off, it
>>>would rotate between about 100 and 15000 RPM. Your gap sounds like an
>>>experimenters dream gap!
>>>Scott Bogard.
>>>
>>>
>>>
>>>
>>>
>>>
>>>>From: "Tesla list" <tesla@xxxxxxxxxx>
>>>>To: tesla@xxxxxxxxxx
>>>>Subject: Re: 180 BPS synch? (fwd)
>>>>Date: Fri, 13 Jul 2007 22:19:00 -0600 (MDT)
>>>>
>>>>
>>>>---------- Forwarded message ----------
>>>>Date: Fri, 13 Jul 2007 21:03:03 -0700
>>>>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>>>>To: Tesla list <tesla@xxxxxxxxxx>
>>>>Subject: Re: 180 BPS synch? (fwd)
>>>>
>>>>Hi Scott,
>>>>
>>>>Your welcome. That's a program the newer coilers probably don't know
>>>>about, but it's been around for a lot of years. There was a time when we
>>>>all talked about this. Probably in the old archives somewhere. I
>>>>personally am a 240 bps guy myself if running in sync.
>>>>
>>>>It's difficult to express why. Part of it is the spark channel building
>>>>upon previous ionized streamers, part of it is the smooth running of the
>>>>gap, and part of it is my previous expeditions of looking at the power
>>>>cycle between the 90 degree voltage and current differentials as I
>>>>compared 120 bps, 240 bps, etc.. However, losses were not considered
>>>>during those simulations, so that is also a factor that has to be at
>>>>least considered. In reality, there's not a lot of difference between
>>>>120 and 240 bps. A simple 8 electrode single gap at 1800 rpm disc speed
>>>>does wonders! Those were things I looked at several years ago. Hard to
>>>>remember the details tonight. I was running sync at that time so this
>>>>info was somewhat important to me.
>>>>
>>>>These days, I'm running VFD variable 3-phase. I love it! Probably won't
>>>>go back to a sync gap simply because I love altering the break rate at
>>>>the twist of my wrist (the sound of the sparks and gap is like revving a
>>>>high performance engine!). Hard to express. When I'm rotating the disc
>>>>fast, bystanders start "standing back" just from the sound. Every coil
>>>>has a particular breakrate that produces a 1)smooth running coil and
>>>>2)long sparks. There's no doubt in my mind about that. I've played
>>>>enough with my VFD to realize that situation is real. Lately, the VFD
>>>>has been my favorite toy. The same could be done with a DC motor of
>>>>course, but with the VFD, I have the same effect with high efficiency
>>>>(plus, I can do sync, preset speeds, or whatever I decide, which is why
>>>>it's a favorite of mine). It's not limited to just one aspect of RSG's.
>>>>
>>>>Take care,
>>>>Bart
>>>>
>>>>Tesla list wrote:
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>---------- Forwarded message ----------
>>>>>Date: Fri, 13 Jul 2007 22:56:16 -0400
>>>>>From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
>>>>>To: tesla@xxxxxxxxxx
>>>>>Subject: Re: 180 BPS synch? (fwd)
>>>>>
>>>>>Bart,
>>>>> Thanks, I see how bad that configuration is, evidently my gut
>>>>>
>>>>>
>>>>>
>>>>>
>>>>instinct
>>>>
>>>>
>>>>
>>>>
>>>>>was incorrect. Thanks for the program, it is very neat, I'm sure it
>>>>>will
>>>>>come in handy.
>>>>>Scott Bogard.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>>From: "Tesla list" <tesla@xxxxxxxxxx>
>>>>>>To: tesla@xxxxxxxxxx
>>>>>>Subject: Re: 180 BPS synch? (fwd)
>>>>>>Date: Fri, 13 Jul 2007 20:28:54 -0600 (MDT)
>>>>>>
>>>>>>
>>>>>>---------- Forwarded message ----------
>>>>>>Date: Fri, 13 Jul 2007 18:06:50 -0700
>>>>>>From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
>>>>>>To: Tesla list <tesla@xxxxxxxxxx>
>>>>>>Subject: Re: 180 BPS synch? (fwd)
>>>>>>
>>>>>>Hi Scott,
>>>>>>
>>>>>>A 6 electrode 180 Hz firing rate has always been looked at as likely
>>>>>>the
>>>>>>worst of all cases. Haven't tried it myself, but there is an old DOS
>>>>>>program (1991) by Robert Jamison you might want to run that looks at
>>>>>>various configurations, and yes, the 6 electrode case is there. It's a
>>>>>>simple .exe file. It's at my web site if you want to download and run.
>>>>>>
>>>>>>http://www.classictesla.com/download/rotjit.zip
>>>>>>
>>>>>>Take care,
>>>>>>Bart
>>>>>>
>>>>>>Tesla list wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>---------- Forwarded message ----------
>>>>>>>Date: Thu, 12 Jul 2007 21:19:19 -0400
>>>>>>>From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
>>>>>>>To: tesla@xxxxxxxxxx
>>>>>>>Subject: RE: 180 BPS synch?
>>>>>>>
>>>>>>>Nobody responded to my message (not even a "yes, it's been done" or a
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>"no
>>>>
>>>>
>>>>
>>>>
>>>>>>>
>>>>>>>
>>>>>>it
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>won't work"), so I'm reposting it on the assumption either nobody got
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>it,
>>>>
>>>>
>>>>
>>>>
>>>>>>>
>>>>>>>
>>>>>>or
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>nobody took the time to read it and respond, thanks.
>>>>>>>Scott Bogard.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>From: "Tesla list" <tesla@xxxxxxxxxx>
>>>>>>>>To: tesla@xxxxxxxxxx
>>>>>>>>Subject: 180 BPS synch? (fwd)
>>>>>>>>Date: Mon, 9 Jul 2007 15:05:02 -0600 (MDT)
>>>>>>>>
>>>>>>>>
>>>>>>>>---------- Forwarded message ----------
>>>>>>>>Date: Mon, 09 Jul 2007 16:31:13 -0400
>>>>>>>>From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
>>>>>>>>To: tesla@xxxxxxxxxx
>>>>>>>>Subject: 180 BPS synch?
>>>>>>>>
>>>>>>>>Greetings all,
>>>>>>>> I was curious, what would the results be of a synchronous motor
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>(1800
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>rpm) being used with 6 electrodes, for 180 BPS. My thinking is that
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>the
>>>>
>>>>
>>>>
>>>>
>>>>>>>>arc
>>>>>>>>put out would be slightly more random due to uneven firing voltages,
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>like
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>an
>>>>>>>>asynch gap, but prevent dangerous resonant rises, due top it's
>>>>>>>>tenancy
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>to
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>inevitably repeat a defined patter over and over again (also
>>>>>>>>different
>>>>>>>>"phasing" may effect output, but I don't think it would ever settle
>>>>>>>>on
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>a
>>>>
>>>>
>>>>
>>>>
>>>>>>>>phase it cannot operate with, or one that would give optimum power).
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>Has
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>anybody tried this, what do you guys think (I just finished building
>>>>>>>>a
>>>>>>>>120/240 BPS sync, so I don't think I will be building another soon,
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>but
>>>>
>>>>
>>>>
>>>>
>>>>>>>>maybe somebody else can try it). Thanks.
>>>>>>>>Scott Bogard.
>>>>>>>>
>>>>>>>>_________________________________________________________________
>>>>>>>>Need a brain boost? Recharge with a stimulating game. Play now!
>>>>>>>>http://club.live.com/home.aspx?icid=club_hotmailtextlink1
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>_________________________________________________________________
>>>>>>>Local listings, incredible imagery, and driving directions - all in
>>>>>>>one
>>>>>>>place! http://maps.live.com/?wip=69&FORM=MGAC01
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>_________________________________________________________________
>>>>>Local listings, incredible imagery, and driving directions - all in one
>>>>>place! http://maps.live.com/?wip=69&FORM=MGAC01
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>_________________________________________________________________
>>>http://newlivehotmail.com
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
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