I have a Arduino Nano that I was planing on using as a eng control system for theses eng.
That is the reason for building this Dino to run simulation on the bench.
I have a data acquisition system http://www.eagletreesystems.com/# that I use now to log the RPM, head Temp and GPS speed in the...
Bill
Can I use 3 transformers to change the lower voltage output of say 40v on each leg to 120v
and use a variac one pot on each transformer to adjust the load.
http://www.ebay.com/itm/181004336490?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
Here is the one I was looking at.
http://www.hobbysupplies.com.au/CMB%20Engines.HTM
Here is a link to one suppler that shows specks on the Eng I run in stock form.
I do all the modification to my own Eng and thy make more than the stock figures. also the stock HP and Rpm ratings are on 20% nitromethain not modified eng running...
One more question what would the calculation be to figure the load on one ph at the lower voltages that the motor will produce.
Say a 15a 120v auto trans would build how many watts at only say 40v?
What you explained is how I had it planned at the on set. but I was running the 3 ph AC thew a bridge to change it to DC. your plain eliminates the need for a bridge. Great idea!
I have done all the calculations for resistance to make the loads with varying voltages as the RPM change with rotor...
There are some trying to use disks from a hard drive with the permint mag in the drive to build a load. moving the mags in and out on the disk will change the load.
Inertia is the reason for not using a large mass on the rotating assembly as this mass will absorb the power. A low mass rotating...
The motors are 6 poll design. as far as heat the motor will be in a water cooling jacket to take the heat out of the motor.
http://kershawdesigns.com/TPPower.htm
This is the motor I am thinking of using.
There are many motor to choose from any KV and polls you can think of.
Most of the high end...
Will the winding in the stator become a opposing field when energized with DC current?
That is the Question I am posing.
If I use the speed controller from say a golf cart. how will this load the motor by back feeding to a battery? Or just using the breaking circuit in the controller?
then you...
The Eng's I will be testing will be any where from 5 to 10HP.
I will be testing different size IC Eng with this setup. So it has to be flexible with its load adjustment.
I am using this small motor to keep the power absorption from the rotors inertia to a minimum.
David
I have explored the Scenario of rectifying the AC to DC then resistors for the load.
Looked at kiln heater coils and also a custom made salt water resistor.
The problem is adaptability over a span of different RPM ranges and load conditions.
the voltage will change a lot with a 780Kv motor. All...
http://www.tppower.com/sort.asp?class_id=4&news=57
Here is a link to the motor that I will be using.
I will turn this motor with a nitro powered 1 CID Eng that will run at 28000rpm to test the power out put.
the motor will be in a rotating cradle with a load cell attached to get ft.lbs...
