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Thread: New VFD announced by Powtran
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10th May 2019, 07:25 PM #46Novice
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The motor I used is 1.5hp - 1.1kw
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10th May 2019 07:25 PM # ADSGoogle Adsense Advertisement
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10th May 2019, 08:11 PM #47.
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10th May 2019, 09:05 PM #48Novice
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No I didn't. At very low revs on one of the the two pulley speed combinations when the torque is low I was able to stall it and after several seconds the VFD cut out. Restarting the VFD all was fine. It is a while since I looked at the specs but I think is has an overload protection built in
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10th May 2019, 10:21 PM #49.
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A 2.2kW VFD will have a default overload current value to protect a 2.2kW motor so nominally ~10A with a 1.5X overload for a small period of time but this could damage a 1.1kW motor.
If you want to protect the smaller motor the Max current output parameter in the VFD should be edited to suit the motor.
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10th May 2019, 10:32 PM #50Novice
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Thanks for that. I'll dig into the set up parameters and see what I can find. I have been into the electronics field for 50 odd years however this is my first time I have done anything with VFD's
I have a brother in law who teaches electrical engineering at a university. If I am stuck I'll contact him. Thanks again for the heads up on a potential problem. I will never go back to a manual speed change again.
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10th May 2019, 10:39 PM #51.
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9th June 2019, 10:49 PM #52SENIOR MEMBER
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Just wondering if anyone has installed a braking resistor on a pi160.
I have a 1.5kw milling machine. I was planning to get a brake resistor but looks like I forgot to order it
If anyone does, can you please confirm the value and power rating?
Russ
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9th June 2019, 11:18 PM #53.
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Couple of gotchas
1) You must have a suffix "Z" model 160 to use a breaking resistor on it. eh 1PI160 1R5G1Z
2) the resistance value of the braking resistor (BR) depends on the HP rating off the specific VFD ie the resistance of the BR for a 2HP PI130 won't necessarily be the same for a 2HP PI160
A couple of years back I bought these BRs
1 x 300W, 100R Braking resistor to suit PI160 1R5G1Z
1 x 300W, 400R Braking resistor to suit PI9130A 1R5G3 - this one installed on an RAS @ the mens shed
1 x 300W, 70R Braking resistor to suit PI9130A -2R2G1.
Note how the 300W BR for the 2HP PI9130 is 400Ω but the 300W for the 2HP PI160 is 100Ω
'
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10th June 2019, 10:20 PM #54SENIOR MEMBER
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Thanks Bob, I do have the Z model, just forgot to order the resistor.
Lots of calculators around but they all require the specified minimum value which is a property of the inverter, unfortunately not specified for the pi160.
Russ
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10th June 2019, 10:33 PM #55SENIOR MEMBER
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Ps, can you remember the approximate cost?
Russ
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10th June 2019, 11:27 PM #56.
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The price for the resistors was something stupid like US$7 - $8 each but at the time shipping was something like US$40!.
At the time (2016) the braking resistors were a 3rd party item and are shipped separately from the original factory.
Don't know what the situation is now.
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20th June 2019, 05:46 PM #57Woodworking mechanic
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Just received an email from Stepperonline. This is one of the new items they have for sale. I buy my stepper motors and controllers from them. Very good company to deal with.
https://www.omc-stepperonline.com/st...=5ce73eeccb797
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4th September 2019, 09:51 PM #58.
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Powtran have sent through their full list of the PI150s available now
The 160's will now be discontinued.
Powtran150.jpg
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4th September 2019, 11:01 PM #59GOLD MEMBER
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One excellent improvement to the P1150 and P1500 series is that the fan is now temperature controlled so that constant irritating fan whine is now a thing of the past and only occurs on cooling demand.
CHRIS
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6th September 2019, 03:36 PM #60Senior Member
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