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Onan Magniciter Theory FAQ


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  #61  
Old 01-20-2017, 11:54:20 PM
Leon N. Leon N. is offline
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Default Re: Onan Magniciter Theory FAQ

JLB just noticed your comments. I am confused by your term DC saturation of the core? Seems to me the revolving field is essentially four coils of wire wound around four pole pieces and the amount of magnetic flux is proportional to the amount of DC current flowing in the coils. Unless my mind is slipping, there is no saturation involved. Saturation has to do with, for example, coupling or transformer action which obviously is not the case here. BTW, Onan states that on the 705 JB magneciter the normal full load DC magnetizing current for the rotor is 40 volts @ 400 watts and (here is the kicker) a transient response of 1400 watts! So from that one could reason that the full load rotor current of 400/40 or 10 amps could increase to 1400/40 or 35 amps during transient responses! That information is stated on the Onan 705JB spec sheet.
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  #62  
Old 01-23-2017, 12:58:22 PM
Leon N. Leon N. is offline
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Default Re: Onan Magniciter Theory FAQ

To clarify a bit what I said about core saturation of the revolving field in post #61. Yes an iron core can become saturated magnetically speaking but I do not think that is the case here simply because the transient response of the exciter is 3.5 times the normal full load rating. Also, I do recall that the Magneciter output 60 hertz waveform has two spikes, one in the positive and one in the negative part of the cycle. This second harmonic does not appear to affect modern day appliances, best I can tell.
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  #63  
Old 01-30-2017, 09:34:12 PM
BergmanJ BergmanJ is offline
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Default Re: Onan Magniciter Theory FAQ

Leon,

Sorry if delayed: Dial-up & phone line was out most of last week!

Possible "saturation" to which I was referring was in toroid core if used as proposed "inside" field driver rectifier bridge (DC side), rather than "as-is" with two torroids "outside" (AC side) the bridge. If the DC could be controlled "inside", it would save one toroid application. Just "thinking outloud -- outside the box". Your (or anyone else's) thoughts???

Regards, JLB
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