Re: 110V Isolation Transformers

David L Anderson wrote:

> From: David L Anderson <daveland@...>
>
> My Servo drivers are transistor based. So all I need is 150 VDC to get
> them going. How I get it is uniporttant to the drive.

This is actually easy. A 1:1 isolation transformer, with 120 in, 120 V RMS
out, run through a full-wave rectifier and capacitor-input filter, will deliver
about 176 V DC out. This is probably just a bit high. You could use a
(big) variac, a series inductor, a 230:208 V autotransformer or some
similar setup to reduce the voltage. If you run the servo amps on 230
V, then you could use a smaller variac (but it would have to be a 230 V
variac).

Jon