Circuit for operating microwave oven

Abstract

Circuit for operating a microwave oven including a DC voltage source, a switching part having at least two switching devices electrically connected to the DC voltage source for switching a voltage from the DC voltage source, controlling part for controlling the switching part, a magnetron for generating a microwave and a converting part for converting the voltage from the DC voltage source to a voltage for operating the magnetron by switching of the switching part, thereby permitting operation of the microwave oven by using a car battery.

What is claimed is:  
     
         1 . A circuit for operating a microwave oven comprising: 
 a DC voltage source;    a switching part having at least two switching devices electrically connected to the DC voltage source for switching a voltage from the DC voltage source;    a controlling part for controlling the switching part;    a magnetron for generating a microwave; and    a converting part for converting the voltage from the DC voltage source to a voltage for operating the magnetron by switching of the switching part.    
     
     
         2 . The circuit as claimed in  claim 1 , wherein the DC voltage source is a car battery source.  
     
     
         3 . The circuit as claimed in  claim 1 , wherein the switching part includes two or four switching devices.  
     
     
         4 . The circuit as claimed in  claim 3 , wherein the switching device includes a bipolar transistor and a diode connected in parallel to each other.  
     
     
         5 . The circuit as claimed in  claim 4 , wherein the switching devices each having the bipolar transistor and the diode are connected in parallel.  
     
     
         6 . The circuit as claimed in  claim 3 , wherein the switching device includes an MOSFET, a diode and a capacitor connected in parallel.  
     
     
         7 . The circuit as claimed in  claim 6 , wherein the switching devices each having the MOSFET, the diode and the capacitor form a serial resonant half-wave voltage doubler rectifier circuit or a serial resonant full wave rectifier circuit.  
     
     
         8 . The circuit as claimed in  claim 1 , wherein the converting part is a transformer.  
     
     
         9 . A circuit for operating a microwave oven comprising: 
 a DC voltage source;    a first switching device connected to the DC voltage source in series for switching a voltage from the DC voltage source;    a second switching device connected to the first switching device in parallel for switching the voltage from the DC voltage source;    a controlling part for controlling the first, and second switching devices:    a magnetron for generating a microwave; and    a converting part connected between the DC voltage source and a node between the first and second switching devices for converting the voltage from the DC voltage source to a voltage for operating the magnetron by switching of the first and second switching devices.    
     
     
         10 . The circuit as claimed in  claim 9 , wherein each of the first, and second switching devices includes a bipolar transistor and a diode connected in parallel to each other.  
     
     
         11 . The circuit as claimed in  claim 9 , wherein the converting part is connected to an anode of the DC voltage source.  
     
     
         12 . A circuit for operating a microwave oven comprising: 
 a DC voltage source;    first and second switching devices connected to the DC voltage source in series for switching a voltage from the DC voltage source;    a controlling part for controlling the first, and second switching devices;    a magnetron for generating a microwave; and    a converting part connected between the DC voltage source and a node between the first and second switching devices for converting the voltage from the DC voltage source to a voltage for operating the magnetron by switching of the first and second switching devices.    
     
     
         13 . The circuit as claimed in  claim 12 , wherein each of the first, and second switching devices includes an MOSFET, a diode and a capacitor connected in parallel to one another.  
     
     
         14 . The circuit as claimed in  claim 12 , wherein the converting part is connected to a cathode of the DC voltage source.  
     
     
         15 . A circuit for operating a microwave oven comprising: 
 a DC voltage source;    first and second switching devices connected to the DC voltage source in series for switching a voltage from the DC voltage source;    third and fourth switching devices connected to the first and second switching devices in parallel for switching the voltage from the DC voltage source;    a controlling part for controlling the first, second, third and fourth switching devices;    a magnetron for operating a microwave; and    a converting part connected between a first node between the first and second switching device and a second node between the third and fourth switching devices for converting the voltage from the DC voltage source to a voltage for operating the magnetron by switching of the first, second, third and fourth switching devices.    
     
     
         16 . The circuit as claimed in  claim 13 , wherein each of the first, second, third and fourth switching devices includes an MOSFET, a diode and a capacitor connected in parallel to one another.