[BC] 3 phase to single phase conversion

PeterH peterh5322 at rattlebrain.com
Sun Feb 8 10:48:03 CST 2009


On Feb 8, 2009, at 7:33 AM, WBRadiolists at aol.com wrote:

>  It is a motor and generator in one housing.

It is NOT a motor and a generator in one housing.

It is an induction motor which acts like a rotating transformer of  
the Scott-T type.

The only rotating component is the squirrel-cage rotor.

There are no brushes, no slip rings, no exciter and no feedback  
control system, although there is usually a magnetic motor starter.

> Big, heavy, and often
> noisy.

It must be sized to your three-phase load, therefore it is only as  
big and noisy as you need for your load.

Generally no more, and certainly no less.

> There are bearings and brushes that will wear out and require
> maintenance/replacement on a regular basis. (Remember: this thing  
> is going to be running
> 24/7.)

Induction motors built for 24/7 service will last a long time.

Induction motors built to a very low "price point" will not.

You get what you pay for.

If a single-phase version of your transmitter is offered, by all  
means order that version, or a conversion kit, if available.




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