Simple turbo pump controller

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Alexi
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Re: Simple turbo pump controller

Post by Alexi » Mon Jan 10, 2011 1:17 am

Hi Rich,

Yes, the pump gets barely warm after many hours of pumping. However, I left the fan on the pump anyway. The fan seems to be made for 208 or 240V AC. It runs on 120V AC very slowly, but that is enough to keep the pump cold.

Alex

richnormand
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Re: Simple turbo pump controller

Post by richnormand » Thu Jan 13, 2011 3:05 am

I received the eBay frequency meter and here it is.

Just wire the +5V, grounds and signal from pin 3 of the 555 timer in Alexi's controller. You can follow the pump ramp up and slowing down from reading its frequency (1500 Hz is 90,000 rpm). Not bad for $12 and free shipping.
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Richard Hester
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Re: Simple turbo pump controller

Post by Richard Hester » Fri Jan 14, 2011 7:33 pm

I may try a simple controller as well, as I have an Alcatel 5010 drag pump coming in the mail, as well as one of uncertain pedigree already in house. If anyone has a copy of the manual, for this one, I'd appreciate it. Otherwise, I'll try contacting Adixen/Alcatel.

AFW
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Re: Simple turbo pump controller

Post by AFW » Sat Jan 15, 2011 9:13 pm

Alexei
Thanks for the controller circuit. I notice that on the TPH 055 diagram there is a contact "D" that doesn't have a corresponding connector on the controller. Is this contact left floating? Also, contact "E" is labelled as 15V, but is connected to the +5V line of the controller. Is this a misprint in the TPH055 diagram?
UK purchasers of these pumps should remember that they will have to pay VAT, which, with postage, brings them to about £100. Still a bargain , though.

Tony Webb

richnormand
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Re: Simple turbo pump controller

Post by richnormand » Sat Jan 15, 2011 9:41 pm

I think the D to F is a variable resistance as the temperature sensor. I did not connect anything to the D terminal. I'll monitor its value next time I ramp the pump and see what happens. It's most likely used with the OEM controller to ramp down or shut down the pump in case it is overheating .

Hall effect sensor for rotation (E) works fine with 5V in my setup, as stated in Alexi's diagram.

Alexi will probably know for sure.

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Alexi
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Re: Simple turbo pump controller

Post by Alexi » Sat Jan 15, 2011 10:49 pm

Correct, the pin D is connected to the temperature sensor. When the pump overheats above 50C, resistance between pins D and F drops and the OEM controller shuts down the pump.

The UGN3077 Hall sensor IC has a built-in voltage regulator and works fine with 4.5V to 24V supply voltage.

Alex
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ggombert
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Re: Simple turbo pump controller

Post by ggombert » Sat Jan 22, 2011 6:37 pm

Has anyone located a source for the connector on these pumps?

Glenn

gpecke
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Re: Simple turbo pump controller

Post by gpecke » Sat Jan 22, 2011 10:45 pm

The connectors for these and the Adixen pumps can be found in the Canon catalog. They have to be
ordered as shell and parts.

Seemed to be a nuisance to order a small quantity of these.

I used crimp connect gold plated single pin connectors crimped onto a ribbon cable and insulated
with heat shrink. This is very quick,cheap and easy to do, and the ribbon cable is neat and easy to handle.

The part I used is at http://www.electusdistribution.com.au , part no. hp1260.

Chris Trent
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Re: Simple turbo pump controller

Post by Chris Trent » Sun Jan 23, 2011 10:44 pm

I have modified this circuit with a L298 H-Bridge in place of the mosfets. In my case the purpose was to drive the a single phase Molecular Drag pump with no center tap, but the addition should work well for most of the rest of you.

The local electronics surplus shop had a whole box of them, so for me it was an easy call.

In addition to being able to run without a center tap, it adds a couple of nice features; you can add an additional switch for fast motor shutdown, and sense resistors for current control.

I'm planning on posting the modified schematic soon.

DSchultz
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Re: Simple turbo pump controller

Post by DSchultz » Sun Jan 23, 2011 11:08 pm

I purchased 20 pieces of the RFP2N08L from Quest Electronics, if anybody wants a pair of them please get in touch with me.

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