I have a transformer, with no labeling whatsoever, that I am attempting to ascertain the design of. It is being used to invert voltage from 6V to 120V to power a 4 Watt F4T5 Fluorescent lamp. Since I am still using the transformer, I am not keen on tearing it apart to see how it is built and was wondering if there was any other way to ascertain its layout.
Here are the specifics of the transformer.
Type: Shell
Lamination: EE
Bobbin: Single
Please refer to the attached diagram for information on the lead assignments.
First I tested for continuity, then for resistance.
2 - 3 Continuity only with each other (Primary?)
1,4 - 7 All show continuity with each other (Secondaries?)
1 - 4 (0.7 Ohms)
1 - 5 (0.7 Ohms)
1 - 6 (3.5 Ohms)
1 - 7 (3.8 Ohms)
2 - 3 (0.8 Ohms)
4 - 5 (0.6 Ohms - These two are connected together via a trace on the PCB)
4 - 6 (3.4 Ohms)
4 - 7 (3.8 Ohms)
5 - 6 (3.6 Ohms)
5 - 7 (3.7 Ohms)
6 - 7 (0.8 Ohms)
Additional Information
The bulb uses bipin T5 connectors. Orienting the bulb in a top and bottom position...
Lead 6 - Connects to one of the two pins on the top of the bulb
Lead 7 - Connects to the other of the two pins on the top of the bulb
Lead 5 - Connects to both pins on the bottom of the bulb
After drawing this out, it appears to me that the secondary coils are wound in three layers, attached in parallel with their center taps joined. I can see the outermost (primary?) coil just under the yellow outer tape of the transformer, it seems to make about 4 turns. Please see the attached diagram on my first impressions of this transformer's layout.
This seems to be a custom transformer, and while I have done a great deal of searching to see if I could find a manufacturer who makes a product similar to this, I am at a loss.
Thank you in advance for any information you might be able to provide me.
Respectfully
Aaron
Here are the specifics of the transformer.
Type: Shell
Lamination: EE
Bobbin: Single
Please refer to the attached diagram for information on the lead assignments.
First I tested for continuity, then for resistance.
2 - 3 Continuity only with each other (Primary?)
1,4 - 7 All show continuity with each other (Secondaries?)
1 - 4 (0.7 Ohms)
1 - 5 (0.7 Ohms)
1 - 6 (3.5 Ohms)
1 - 7 (3.8 Ohms)
2 - 3 (0.8 Ohms)
4 - 5 (0.6 Ohms - These two are connected together via a trace on the PCB)
4 - 6 (3.4 Ohms)
4 - 7 (3.8 Ohms)
5 - 6 (3.6 Ohms)
5 - 7 (3.7 Ohms)
6 - 7 (0.8 Ohms)
Additional Information
The bulb uses bipin T5 connectors. Orienting the bulb in a top and bottom position...
Lead 6 - Connects to one of the two pins on the top of the bulb
Lead 7 - Connects to the other of the two pins on the top of the bulb
Lead 5 - Connects to both pins on the bottom of the bulb
After drawing this out, it appears to me that the secondary coils are wound in three layers, attached in parallel with their center taps joined. I can see the outermost (primary?) coil just under the yellow outer tape of the transformer, it seems to make about 4 turns. Please see the attached diagram on my first impressions of this transformer's layout.
This seems to be a custom transformer, and while I have done a great deal of searching to see if I could find a manufacturer who makes a product similar to this, I am at a loss.
Thank you in advance for any information you might be able to provide me.
Respectfully
Aaron