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Search: Posts Made By: oil pan 4
Forum: Conservation 03-26-17, 09:40 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I run my motors well above rated horsepower. ...

I run my motors well above rated horsepower.
For example on my 2hp 4 pole compressor it runs a .95 power factor, so 6.5 amps is equal to 2hp.
I run it up to 7.5 amps which is close to 2.5hp. The...
Forum: Conservation 03-20-17, 08:46 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I took the 2hp motor put in a smaller start...

I took the 2hp motor put in a smaller start capacitor, with some testing I found the smaller capacitor starting amps trending slightly lower and we're being more consistent.
I also took my big 8 amp...
Forum: Conservation 03-09-17, 10:51 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I needed a much larger than normal 56 inch belt...

I needed a much larger than normal 56 inch belt to connect the 2hp 4 pole motor with 6 inch pulley to the compressor. It came in and I finally tested it.
The motor inrush full power starting the...
Forum: Conservation 03-05-17, 05:27 AM
Replies: 30
Views: 11,776
Posted By oil pan 4
I tried putting the go cart clutch on a 4 pole...

I tried putting the go cart clutch on a 4 pole motor and as I expected running the clutch at half speed would not engage the clutch at all.
I took the very strong spring out of the clutch and...
Forum: Conservation 03-04-17, 12:08 AM
Replies: 30
Views: 11,776
Posted By oil pan 4
The 2hp 4 pole motor I ordered came in. Full...

The 2hp 4 pole motor I ordered came in.
Full power starting it free spinning with no power factor correction it hit 14 amps. Resistor starting reduced it to 11 amps. Power factor correction should...
Forum: Conservation 03-01-17, 05:28 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
Turns out the cheapest most effective way to...

Turns out the cheapest most effective way to reduce start up inrush was sitting in front of me the whole time.
I put the gocart clutch on my 2.5hp 2pole compressor. I knew it was going to need a...
Forum: Conservation 02-27-17, 11:45 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
Alright I have my ABB drive and motor working in...

Alright I have my ABB drive and motor working in hand control only.
The ABB drive has digital input that could be controlled with pressure switches and used to ramp up the speed.
Forum: Conservation 02-25-17, 10:43 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I pretty much have to start the single phase...

I pretty much have to start the single phase motors unloaded so it needs a clutch of some sort.
The 3 phase motor on a VFD is going to just be belted to the compressor with solid pulleys and no...
Forum: Conservation 02-24-17, 10:52 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I did buy the single phase powered ABB drive it...

I did buy the single phase powered ABB drive it should be here next week.
Along with that 4 pole motor.
Looks like the go-cart clutch will be here first thing next week. I'm going test putting it...
Forum: Conservation 02-22-17, 01:06 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
Alright I have made 3 more advancements towards...

Alright I have made 3 more advancements towards startup inrush reduction.
First I picked up a 1hp 3 phase wye wound 4 pole motor. free. Only problem is the ABB VFD I want to use isn't free.
I went...
Forum: Conservation 02-19-17, 11:30 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I converted one of my compressors to 240v. ...

I converted one of my compressors to 240v.
Instead of using a normal 2pole 3,600rpm air compressor motor I found a 4 pole 1,800rpm motor.
I have found that high speed 2 pole motors typically have a...
Forum: Conservation 02-18-17, 02:56 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I need an additional unloader valve because the...

I need an additional unloader valve because the mechanical one closes as soon as the mechanical pressure switch closes and sends power to the motor. I need the unloader to stay open until the...
Forum: Conservation 02-18-17, 10:31 AM
Replies: 30
Views: 11,776
Posted By oil pan 4
I will do 3 phase eventually because I can score...

I will do 3 phase eventually because I can score a free good motor from work. Anything smaller than 10hp goes in the recycling bin and doesn't get sent off to be rebuilt.
The 3 phase VFD units are...
Forum: Conservation 02-13-17, 07:37 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
My 5ohm 200w resistors came in. So I put them on...

My 5ohm 200w resistors came in. So I put them on on my manual soft start experiment board.
I suspected that running the starter with power factor correction capacitors removed would make more heat...
Forum: Conservation 02-13-17, 06:15 AM
Replies: 30
Views: 11,776
Posted By oil pan 4
I have tried inductors. The inductors that I...

I have tried inductors. The inductors that I could get ahold of didn't preform as well as the resistors I could get.
I used micro wave over transformers that had their secondary windings removed....
Forum: Conservation 02-12-17, 04:03 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
This shouldn't be too hard to do. Using the...

This shouldn't be too hard to do.
Using the existing pressure switch as the on/off control signal, linear actuator to slack and tension the belt, using the motors centrifugal switch, a magnetic...
Forum: Conservation 02-09-17, 09:14 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I'm rebuilding my 20 some year old speedy air...

I'm rebuilding my 20 some year old speedy air compressor as an off grid soft start unit. The compressor went bad and it developed a pin hole leak on one of the welds. So I welded over the pin hole...
Forum: Conservation 01-22-17, 11:38 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I was looking at the hyper engineering single...

I was looking at the hyper engineering single phase soft start figuring out exactly which wire was getting connected where. Then realized there isn't a capacitor start circuit on the soft start,...
Forum: Conservation 01-21-17, 01:11 AM
Replies: 30
Views: 11,776
Posted By oil pan 4
I tested starting my air compressor with my 5kw...

I tested starting my air compressor with my 5kw varrac. I was only able to reduce starting amps from 45 amps across the line starting down to 35 amps by switching the varrac on at 220v and very...
Forum: Conservation 01-14-17, 12:40 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
I can use any motor that I can get a pulley onto....

I can use any motor that I can get a pulley onto. Which means it needs to have a keyed straight shaft or a pulley already on there.
I will keep that in mind for later on for running straight off DC...
Forum: Conservation 01-14-17, 09:11 AM
Replies: 30
Views: 11,776
Posted By oil pan 4
Alright I think I found a way to do single phase...

Alright I think I found a way to do single phase soft start.
Hyper Engineering | Single Phase (http://hypereng.com/single_phase.html)

But there are a few concerns.
Single phase capacitor start...
Forum: Conservation 01-11-17, 02:07 PM
Replies: 30
Views: 11,776
Posted By oil pan 4
Eliminating start up inrush current

I may try closed circuit soft starts but the way capacitor start motors work this may only be marginally effective. I have a feeling if I really want to do this its going to involve a 3 phase VFD.
...
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