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Voltage compensation in combination oven using radiant and microwave energy

  • US 6,696,676 B1
  • Filed: 01/11/2000
  • Issued: 02/24/2004
  • Est. Priority Date: 03/30/1999
  • Status: Expired due to Term
First Claim
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1. A method for maintaining a constant energy into food being cooked in an oven including a microwave cooking unit, at least one radiant cooking unit, a control panel and a microcomputer for executing desired cooking operations of the microwave cooking unit and radiant cooking unit in accordance with selected user inputs to the control panel, the user inputs including a cooking time and cooking power levels for the respective cooking units, the oven connected to a power source including an input voltage to the oven, said method comprising the steps of:

  • determining a magnitude of the input voltage to the oven;

    comparing the determined input voltage to a nominal input voltage;

    calculating a delta voltage ratio;

    determining a time adjustment value comprising the steps of;

    squaring the delta voltage ratio to determine a squared voltage ratio;

    multiplying the squared voltage ratio by 5; and

    subtracting 1.5 times the delta voltage ratio;

    adding the time adjustment value to the user selected cooking time to determine an adjusted cooking time; and

    operating the microwave cooking unit and radiant cooking unit for the adjusted cooking time.

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