XPost: alt.home.repair, uk.d-i-y, alt.sci.physics   
   From: CFKinsey@military.org.jp   
      
   On Mon, 31 Dec 2018 15:12:23 -0000, trader_4  wrote:   
      
   > On Monday, December 31, 2018 at 9:43:22 AM UTC-5, Max Demian wrote:   
   >> On 31/12/2018 07:18, Diesel wrote:   
   >> > Arthur Conan Doyle    
   >> > news:n1ff2el7b5fc6megbeihv069t05gouso10@None Sat, 29 Dec 2018   
   >> > 18:27:21 GMT in alt.home.repair, wrote:   
   >> >   
   >> >> "William Gothberg"  wrote:   
   >> >>   
   >> >>> Why is it called an invertor?   
   >> >>   
   >> >> Typical microwaves use fixed AC power to drive the magnetron.   
   >> >> Inverter driven magnetrons use DC power, which can be variable.   
   >>   
   >> > Wrong.   
   >> >   
   >> > Both styles actually take AC incoming mains, raise it to 5k or so,   
   >> > and convert it with a single diode mind you, to DC to feed the   
   >> > magnetron. The filament is fed by low voltage AC. Neither of them can   
   >> > or do vary the voltage going to the magnetron. That's just not how it   
   >> > works. You can't lower the voltage to reduce microwave energy. And   
   >> > you can't raise it to get more microwave energy, either. The   
   >> > magnetron requires voltage within a certain range to function. More   
   >> > than that will burn the magnetron up. Less will prevent it from   
   >> > making viable microwaves.   
   >>   
   >> So what is the difference between inverter and non inverter types? Is   
   >> 'inverter' an appropriate term? How do either control the power?   
   >   
   > He abundantly and mostly correctly explained that in his previous post,   
   > including the one you copied.  The inverter type still pulse the magnetron,   
   > just at a very fast rate, so that for all practical purposes, it's   
   > like being continuous.  It's like dimming a 100W bulb.  If you turn it   
   > on and off half the time in 1 second cycle times, you will see it blinking.   
   > If you do that with a very fast cycle time you will see a dimmed but   
   > continuous light.  That's how bulb dimmers work too.   
      
   Well they're meant to, but you can see them flickering, especially at the   
   lower quarter of brightness.  Or maybe I have better eyesight than the   
   designers?   
      
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