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    • 9. 发明授权
    • Image forming method and apparatus having induction heat fixing device with temperature sensing of switching element
    • 具有感应热定影装置的图像形成方法和装置,具有开关元件的温度感测
    • US08929761B2
    • 2015-01-06
    • US13448667
    • 2012-04-17
    • Hitoshi WakideAtsushi Yamaguchi
    • Hitoshi WakideAtsushi Yamaguchi
    • G03G15/20H05B6/06
    • G03G15/205G03G2215/00721
    • An image forming apparatus uses a switching element to switch current flowing to an excitation coil, so that a heating layer in a fixing member produces heat that fixes an image to a transported sheet. Based on a change in temperature of the switching element over time, a prediction unit determines, at a predetermined first time point, a predicted temperature of the switching element at a second time point at which a tip of the sheet is scheduled to arrive at the fixing member. When the predicted temperature is at least a predetermined value, a control unit controls power supplied to the excitation coil by restricting switching of the switching element and lifting the restriction, so that by the second time point the detected temperature of the fixing member reaches a temperature necessary for fixing.
    • 图像形成装置使用开关元件来切换流向励磁线圈的电流,使得固定构件中的加热层产生将图像固定到传送的片材上的热量。 基于开关元件的温度随时间的变化,预测单元在预定的第一时间点确定在片材的末端到达第二时间点的开关元件的预测温度 固定件。 当预测温度至少为预定值时,控制单元通过限制开关元件的切换和提升限制来控制提供给励磁线圈的电力,使得在第二时间点,固定构件的检测温度达到温度 固定必要