Resonant inverter
First Claim
1. A resonant inverter comprising, in combination:
- input terminals energizable from a DC supply source and having a filter capacitor;
an energy storage transformer having a primary winding;
means to obtain an output from said transformer;
conducting, resonating, and clamping means connected to said transformer primary winding to established sequentially conducting, resonating, and clamping portions of repetitive cycles of operation, respectively;
said conducting means including a first semiconductor connected to said primary winding to conduct current therethrough;
said resonating means connected to resonate the energy in said primary winding including a storage capacitor connected to said primary winding;
a second semiconductor having a control element;
means responsive to the current of said first semiconductor to turn on said second semiconductor and to turn off said first semiconductor;
said resonating means reversing the current in said primary winding and establishing the energy stored in the inductance of the primary winding being released into said storage capacitor; and
said clamping means including unidirectional conducting means connected to establish a time for excess energy stored in the tank circuit composed of said primary winding and said storage capacitor to return to the input and be stored in said filter capacitor.
1 Assignment
0 Petitions
Accused Products
Abstract
A resonant inverter is current mode-controlled with a transistor supplying current through a primary winding of a transformer. The cycle of operation includes conducting, resonating, and clamping portions of the cycle, with the transistor being turned on for the conducting portion. The resonating portion includes a storage capacitor connected to the primary winding and commences when current-responsive means of the transistor or first semiconductor turns on a second semiconductor, which in turn turns off the first semiconductor. During this resonating stage, the current in the primary winding reverses and stores energy in a storage capacitor. A clamping portion of the cycle includes a unidirectional conducting means or diode which conducts for a time for the excess energy stored in the tank circuit to return to the input and be stored in a filter capacitor.
-
Citations
15 Claims
-
1. A resonant inverter comprising, in combination:
-
input terminals energizable from a DC supply source and having a filter capacitor; an energy storage transformer having a primary winding; means to obtain an output from said transformer; conducting, resonating, and clamping means connected to said transformer primary winding to established sequentially conducting, resonating, and clamping portions of repetitive cycles of operation, respectively; said conducting means including a first semiconductor connected to said primary winding to conduct current therethrough; said resonating means connected to resonate the energy in said primary winding including a storage capacitor connected to said primary winding; a second semiconductor having a control element; means responsive to the current of said first semiconductor to turn on said second semiconductor and to turn off said first semiconductor; said resonating means reversing the current in said primary winding and establishing the energy stored in the inductance of the primary winding being released into said storage capacitor; and said clamping means including unidirectional conducting means connected to establish a time for excess energy stored in the tank circuit composed of said primary winding and said storage capacitor to return to the input and be stored in said filter capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification