Re: Center tapped transformer

--- In CAD_CAM_EDM_DRO@y..., "Tim Goldstein" <timg@k...> wrote:

> I have a transformer that is center tapped on the secondary. Voltage
> from the center tap to either end is 30 v. from end to end it is 60
> volts. I know that if I want 60 volts I just connect the ends to the
> bridge and tape off the center tap. How do I connect it if I want 30
> volts at the maximum amperage possible? I realize I can connect

from one

> end to the center and get the 30 volts, but it seems like I am

missing

> out on amperage by not somehow using the other half of the coil.
>
> Tim
> [Denver, CO]

Tim: Elecronically there is little difference between a full
winding, bridge rectifier and a center-tapped dual diode approach.
Just connect it up as shown in the ASCII schematic. In most of the
switching power supplies the secondary is center tapped and they use
a single "half bridge" device (looks like a power transistor)to do
the recification. You can find the dual-diode half bridge devices
pretty cheap. Look for a common cathode device. The amperage of the
secondary is a factor of several things but is usually limited by the
size of the core and the size wire in the secondary. Disconnecting
the two windings at the center tap and running them in parallel will
not increase the amount of current you can get from the secondary.