Transformers....
Well, here is a techy bit.....We've been having suboptimal performance form our "smart" switchmode battery charger for some time now, so I've finally decided to take matters into my own hands.
The parts....about $150 USD. Notice the 12" tiles for scale.
Fortunately, in the DR, transformer and motor winding is not a black art and is a common streetside profession, so I have been able to gather the needed knowledge and materials easily.
Winding the 5ga solid secondaries was hard work, and assembling the hundreds of core laminates by hand was tedious, but....
We wound the transfomer and, lo and behold, it works! next comes high amperage testing and incorporating control circuitry.
4 hours later...
Tech Stuff:
3.6KVA
Dual 14ga Primaries:
110v and 80-154v , step 10v for universal voltage 80 - 154 and 190 - 264 v operation
Secondaries are 120+A rated 5ga
2 ea 16v and 2 ea 2v, for 16,18,22v (200A) and 32,36,40v (100A) configurations.
Assuming normal or low input voltages, swithcing the primary to higher voltage windings gives 4+ 1.2v downward output steps and one 1.2v upward (more steps with a reduced duty cycle) output step.
This gives a fine grained range of 11 - 23v at 200A in approx 1v increments and 27-41v at 100A.
To this manual (switch based) control, I will be adding an triac circuit to give fine grained voltage and current limit control.
The parts....about $150 USD. Notice the 12" tiles for scale.Fortunately, in the DR, transformer and motor winding is not a black art and is a common streetside profession, so I have been able to gather the needed knowledge and materials easily.
Winding the 5ga solid secondaries was hard work, and assembling the hundreds of core laminates by hand was tedious, but....
We wound the transfomer and, lo and behold, it works! next comes high amperage testing and incorporating control circuitry.
4 hours later...3.6KVA
Dual 14ga Primaries:
110v and 80-154v , step 10v for universal voltage 80 - 154 and 190 - 264 v operation
Secondaries are 120+A rated 5ga
2 ea 16v and 2 ea 2v, for 16,18,22v (200A) and 32,36,40v (100A) configurations.
Assuming normal or low input voltages, swithcing the primary to higher voltage windings gives 4+ 1.2v downward output steps and one 1.2v upward (more steps with a reduced duty cycle) output step.
This gives a fine grained range of 11 - 23v at 200A in approx 1v increments and 27-41v at 100A.
To this manual (switch based) control, I will be adding an triac circuit to give fine grained voltage and current limit control.
posted by CT | 9:07 AM
0 Comments:
Post a Comment
<< Home