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Microwave oven transformers
John - KD5YI wrote:
Tim Wescott wrote: Using 1/2 wave rectification on each one will result in big DC currents in the coils. These DC currents will saturate your cores like nothing else. Hey, Tim - IIRC, there is only one diode attached to the transformer in my microwave. That would mean it is half-wave rectified as it comes from the factory. Yes? Cheers, John Yes, come to think of it -- yes. Perhaps the core is sized to take it. I guess the next question is how much harder can you push the system if you _aren't_ putting DC on the core? -- Tim Wescott Wescott Design Services http://www.wescottdesign.com Posting from Google? See http://cfaj.freeshell.org/google/ "Applied Control Theory for Embedded Systems" came out in April. See details at http://www.wescottdesign.com/actfes/actfes.html |
#2
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Microwave oven transformers
Tim Wescott wrote:
John - KD5YI wrote: Tim Wescott wrote: Using 1/2 wave rectification on each one will result in big DC currents in the coils. These DC currents will saturate your cores like nothing else. Hey, Tim - IIRC, there is only one diode attached to the transformer in my microwave. That would mean it is half-wave rectified as it comes from the factory. Yes? Cheers, John Yes, come to think of it -- yes. Perhaps the core is sized to take it. I guess the next question is how much harder can you push the system if you _aren't_ putting DC on the core? Do they not put a capacitor in series with the transformer secondary, and then connect this combination to a diode in parallel with the magnetron? In this way the capacitor would prevent DC in the transformer. Chris |
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