Toroidal transformer parallel conection

[martintw]

Hi, I have toroidal transformer with two secondary windings. I want to connect these windings in parallel for greater power output. But I dont know if I do it before rectifying or after. Transformer will be used for driving stepper motors. This is the transformer that I will use.

Thanks.

 

[FlapJack]

You could parallel the two windings out of the transformer and use one bridge rectifier. Or you could run each winding in to a bridge rectifier and parallel the DC output of each bridge rectifier.

It depends on if you want to use one large bridge rectifier or two smaller ones.

 

[betwixt]

If you are absolutely certain the two secondary voltages are identical, and you take care to wire them in phase, you can parallel them and use a single large rectifier. If there is a risk the voltages are different, even by a small amount, you will feed current from one winding into the other and produce a lot of heat, in that case it is safer to rectify them individually and parallel the DC outputs. The result should be the same whichever way you do it.

Brian.

 

[Anna Conda]

flapJack has the best solution here...

 

[martintw]

Hi, thanks for your help. I will take some measurements and decide what to do.