XPost: alt.home.repair, uk.d-i-y, alt.sci.physics   
   From: rod.speed.aaa@gmail.com   
      
   "Arthur Conan Doyle"  wrote in message   
   news:n1ff2el7b5fc6megbeihv069t05gouso10@None...   
   > "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.   
      
   Pulse width modulation, actually.   
      
   https://en.wikipedia.org/wiki/Microwave_oven   
      
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