[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: 180 BPS synch? (fwd)

To: tesla@xxxxxxxxxx
Subject: Re: 180 BPS synch? (fwd)
From: "Tesla list" <tesla@xxxxxxxxxx>
Date: Tue, 17 Jul 2007 06:37:32 -0600 (MDT)
Delivered-to: testla@xxxxxxxxxx
Delivered-to: tesla@xxxxxxxxxxxxxxxx
Old-return-path: <mod1@xxxxxxxxxx>
Resent-date: Tue, 17 Jul 2007 06:37:33 -0600 (MDT)
Resent-from: tesla@xxxxxxxxxx
Resent-message-id: <MSfkxf59PGJ.A.FkB.NgLnGB@chip1>
Resent-sender: tesla-request@xxxxxxxxxx
---------- Forwarded message ----------
Date: Mon, 16 Jul 2007 22:59:57 -0500
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 180 BPS synch? (fwd)



Does it seem to resist any problems induced by the primary?  I tried an 
earlier VFD drive and the primary induced currents drove it nutso.

DC

Resonance Research Corp.
www.resonanceresearch.com


----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, July 16, 2007 10:11 PM
Subject: 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
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Prev by Date: Re: Resonant frequency of twin coil? (fwd)
Next by Date: RE: 180 BPS synch, Hatachi L100 drive (fwd)
Previous by thread: Re: 180 BPS synch? (fwd)
Next by thread: Re: 180 BPS synch? (fwd)
Index(es):
- Date
- Thread