Re: 180 BPS synch? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- 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
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>_________________________________________________________________
>>>>Local listings, incredible imagery, and driving directions - all in one
>>>>place! http://maps.live.com/?wip=69&FORM=MGAC01
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>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>
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