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    • 6. 发明申请
    • FIXING DEVICE, CONTROL METHOD FOR THE SAME, AND IMAGE FORMING APPARATUS
    • 固定装置,其控制方法和图像形成装置
    • US20120051775A1
    • 2012-03-01
    • US13204821
    • 2011-08-08
    • Yushi MIYATAKeita Maejima
    • Yushi MIYATAKeita Maejima
    • G03G15/20
    • G03G15/2042H05B6/06H05B6/145
    • A fixing device includes: a heat generating rotating member including a heat generating layer; an exciting coil to inductively heat the heat generating layer; a degaussing coil generating an electrical current in response to a magnetic flux generated by the exciting coil and generating a magnetic flux in an opposite direction; an exciting coil controller configured to control energization of the exciting coil by using PWM signals; a degaussing coil controller determining necessity of switching the degaussing coil and to control energization of the degaussing coil. When the degaussing coil controller switches ON/OFF state of the degaussing coil, the exciting coil controller controls ON time periods of the PWM signals so as to be within a range from minimum to maximum values of the ON time periods of the PWM signals corresponding to the ON/OFF state of the degaussing coil stored in a storage unit.
    • 定影装置包括:发热旋转部件,其包括发热层; 用于感应加热发热层的励磁线圈; 消磁线圈响应于由所述励磁线圈产生的磁通而产生电流并且沿相反方向产生磁通量; 励磁线圈控制器,其被配置为通过使用PWM信号来控制励磁线圈的通电; 消磁线圈控制器确定切换消磁线圈并且控制消磁线圈的通电的必要性。 当消磁线圈控制器切换消磁线圈的接通/断开状态时,励磁线圈控制器控制PWM信号的接通时间周期,以便在对应于PWM信号的PWM信号的接通时间段的最小值到最大值的范围内 存储在存储单元中的消磁线圈的ON / OFF状态。