[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: MOT Primary Current Question

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Steve,
Saturation of the core is determined by the volts per turn on the primary, the primary frequency, the area of the core, and the magnetic material. 

Volts/turn = dphi/dt
Given frequency, you can calculate the peak flux (phi) from the above. Flux density (B) will be peak_flux/area and it is flux density that causes a ferromagnetic material to saturate (level of which is a property of the material). 

Gerry R.


Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>

My question, which I asked years ago and never got an answer, is this:
Suppose your MOT at 120 VAC applied draws 5 amps with no load.  Then suppose
a load is applied, and the total primary current goes up to 10 amps, for
example.  Does a load on the secondary have any effect on core saturation
for a constant primary voltage?  In other words, would less power be wasted
in the core so that more power ends up in the secondary supplying power to a
load?

Thanks,
--Steve