Multi-channel pulse sequencing to control the charging and discharging of capacitors into an inductive load

Abstract

Apparatus and method for multi-channel pulse sequencing to control the charging and discharging of two capacitors into an inductive load. The invention allows devices that produce alternating magnetic fields (induction heating, AC motors, metal detectors, MRIs, wireless communication) to operate above 100% efficiency; thereby producing a power gain. The results of this improvement will allow these devices to be portable and low cost.

What is claimed is: 
     
         1 . A method of providing multi-channel pulse sequencing power control, comprising:
 applying a direct current power source to a pulse width modulation (PWM) module to activate each of a first charging switch and a second charging switch;   charging a first capacitor coupled to the first charging switch and a second capacitor coupled to the second charging switch;   activating a first bidirectional switch by the PWM module to allow the first capacitor and an inductive load to oscillate for a first temporal period; and   activating a second bidirectional switch by the PWM module after the first temporal period to allow the second capacitor and the inductive load to oscillate for a second temporal period.   
     
     
         2 . The method of  claim 1 , further comprising:
 activating the first bidirectional switch after the second temporal period.   
     
     
         3 . The method of  claim 1 , further comprising:
 alternately activating the first bidirectional switch and the second bidirectional switch after the first temporal period and the second temporal period.   
     
     
         4 . The method of  claim 1 , further comprising:
 deactivating the first bidirectional switch after expiration of the first temporal period; and   deactivating the second bidirectional switch after an expiration of the second temporal period.   
     
     
         5 . The method of  claim 4 , further comprising:
 activating the first charging switch during oscillation of the second capacitor and the inductive load to fully charge the first capacitor.   
     
     
         6 . The method of  claim 5 , wherein the first charging switch is activated after half of the second temporal period. 
     
     
         7 . The method of  claim 4 , further comprising:
 activating the second charging switch during oscillation of the first capacitor and the inductive load to fully charge the second capacitor.   
     
     
         8 . The method of  claim 7 , wherein the second charging switch is activated after half of the first temporal period. 
     
     
         9 . The method of  claim 1 , further comprising:
 removing the direct current power source to the PWM module;   activating both the first bidirectional switch and the second bidirectional switch; and   deactivating each of the first charging switch and the second charging switch to discharge each of the first capacitor and the second capacitor.