×

Control system for powering plural inductive loads from a single inverter source

  • US 5,523,631 A
  • Filed: 08/25/1993
  • Issued: 06/04/1996
  • Est. Priority Date: 08/25/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A control system for controlling overshoot and undershoot power values when switching power from an output of a single inverter power supply to at least a selected one of plural inductive loads, each inductive load having a respective resonant frequency associated therewith, the inverter power supply having an inverter output switch therein and being adjustable for outputting a preselected amount of power, the system comprising:

  • (a) load switching means for selectably switching the inverter output among selected ones of the plural inductive loads in a time-shared manner;

    (b) means for measuring power output from the inverter and detecting overshoot or undershoot power values occurring when switching from one inductive load to another;

    (c) time delay source for connection to the load switching means for starting a delay time period upon switching from one inductive load to another and for generating and outputting a signal at a preselected end of said delay time period, the signal triggering the inverter output switch to deliver the power output of the inverter to the load switching means for switching to the selected load; and

    (d) means for adjusting the preselected end of the delay time period during a subsequent switching operation from one load to another in response to the measured overshoot or undershoot power values by an amount calculated to reduce subsequent power overshoot or undershoot.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×