The official motor regulator circuit

lt cdr data · 14th June 2005, 10:46 AM

I have done this from a motor regulator for a turntable of mine, it has switchable 33 and 45 rpm, to a dc motor.

I haven't strictly drawn it correct, there MAY be errors, the first transistor is actually a fet, and I hope I have them connected the right way, but if anyone cleverer than me sees any errors, please correct them.

lt cdr data · 14th June 2005, 11:30 AM

ok another one here, this one is drawn slightly better, but again I have drawn with just npn bipolars, there could be errors, if anyone sees how this works, please inform.

left comes in from the bridge, 2 wires top right go to the motor.

lt cdr data · 14th June 2005, 04:55 PM

now redone correctly, this is 99% right this time.

This is the reg of my turntable, with adjustable 33 and 45 rpm.

enjoy, comments welcome,. I didn't design this.

lt cdr data · 14th June 2005, 06:01 PM

BTw, its the reg. from a slightly earlier oigrin live psu, the advanced version.
A later ultra version has slightly more transistors, some paralled.

Motor for dc 100 is maxon 110189, a max range, 7 watt with 1.2ma start up current. 36 volts nominal 26 mm in diameter

at a guess dc200 is re max range, 226779, 9 watt.

The first terminal of the jfet attached to the input of the psu is actually the source.

Comments are invited.

lt cdr data · 14th June 2005, 06:23 PM

thanks

Bill Fitzpatrick · 14th June 2005, 08:21 PM

You're welcome

john2 · 1st October 2005, 10:22 AM

Re the Origin Live power supply drawings they give no resister values, the details on what particular diodes, thyristors etc., etc., are absent-it is my intention to build an Origin Live power supply, without the missing details it will be dificuilt, to say the least.

Should anybody have any details regarding the missing information and/or the latest incarnation of the Origin Live power supply I would be most grateful.

hagtech · 2nd October 2005, 04:46 AM

Are you sure you drew this correctly? The C3 concerns me - could be stability issue within loop. And does motor current return to select, or to ground?

Why not just use a regulator chip? Like an LM2941 or LT1129? These are pretty low noise and have adjustable versions. They combine the PNP and all other stuff (including reference) inside. Very easy to use.

jh

14th June 2005, 06:23 PM	#5
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	ogirin live info see below thanks

1st October 2005, 10:22 AM	#7
john2 diyAudio Member Join Date: Aug 2004 Location: lanc	Origin Live power supply Re the Origin Live power supply drawings they give no resister values, the details on what particular diodes, thyristors etc., etc., are absent-it is my intention to build an Origin Live power supply, without the missing details it will be dificuilt, to say the least. Should anybody have any details regarding the missing information and/or the latest incarnation of the Origin Live power supply I would be most grateful.

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14th June 2005, 06:01 PM	#4
lt cdr data diyAudio Member Join Date: Dec 2003 Location: earth	BTw, its the reg. from a slightly earlier oigrin live psu, the advanced version. A later ultra version has slightly more transistors, some paralled. Motor for dc 100 is maxon 110189, a max range, 7 watt with 1.2ma start up current. 36 volts nominal 26 mm in diameter at a guess dc200 is re max range, 226779, 9 watt. The first terminal of the jfet attached to the input of the psu is actually the source. Comments are invited.

14th June 2005, 08:21 PM	#6
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	You're welcome

2nd October 2005, 04:46 AM	#8
hagtech diyAudio Member Join Date: Mar 2002 Location: Hawaii	Are you sure you drew this correctly? The C3 concerns me - could be stability issue within loop. And does motor current return to select, or to ground? Why not just use a regulator chip? Like an LM2941 or LT1129? These are pretty low noise and have adjustable versions. They combine the PNP and all other stuff (including reference) inside. Very easy to use. jh

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