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    • 3. 发明授权
    • Power supply unit in image forming apparatus
    • 图像形成装置中的电源单元
    • US07548708B2
    • 2009-06-16
    • US11275634
    • 2006-01-20
    • Osamu NagasakiAtsuhiko YamaguchiTomohiro NakamoriTakehiro UchiyamaKouji YasukawaTeruhiko NamikiHiroki Murata
    • Osamu NagasakiAtsuhiko YamaguchiTomohiro NakamoriTakehiro UchiyamaKouji YasukawaTeruhiko NamikiHiroki Murata
    • G03G15/00H01L41/00
    • G03G15/80
    • A power supply unit in an image forming apparatus is provided. The power supply unit includes a piezoelectric transformer, an output voltage detecting circuit which detects the output voltage of the piezoelectric transformer, an output voltage control circuit which controls an output voltage from the piezoelectric transformer, and includes a comparator which receives an output voltage setting signal, together with an output voltage detecting signal fed back from the output voltage detecting circuit, to compare the output voltage setting signal and the output voltage detecting signal. The power supply unit also includes a driving frequency supplying circuit which generates a driving frequency signal of the piezoelectric transformer in accordance with a comparison result by the comparator, and supplies the driving frequency signal to the piezoelectric transformer. The time constant of the output voltage control circuit is longer than the time constant of the output voltage detecting circuit.
    • 提供了图像形成装置中的电源单元。 电源单元包括压电变压器,检测压电变压器的输出电压的输出电压检测电路,控制来自压电变压器的输出电压的输出电压控制电路,并包括接收输出电压设定信号的比较器 与从输出电压检测电路反馈的输出电压检测信号一起比较输出电压设定信号和输出电压检测信号。 电源单元还包括驱动频率提供电路,其根据比较器的比较结果产生压电变压器的驱动频率信号,并将驱动频率信号提供给压电变压器。 输出电压控制电路的时间常数大于输出电压检测电路的时间常数。
    • 5. 发明授权
    • Power supply apparatus, and image forming apparatus having the same
    • 电源装置和具有该电源装置的图像形成装置
    • US07265479B2
    • 2007-09-04
    • US11275635
    • 2006-01-20
    • Atsuhiko YamaguchiHiroshi ManoOsamu NagasakiKouji Yasukawa
    • Atsuhiko YamaguchiHiroshi ManoOsamu NagasakiKouji Yasukawa
    • H01L41/107
    • H02M3/28G03G15/80H02M1/14H02M3/156H02M2001/008
    • In a power supply apparatus including a plurality of power supply circuits, each of the power supply circuits has a piezoelectric transformer, a rectification element which rectifies and smoothes a voltage output from the piezoelectric transformer in accordance with a load and outputs the voltage, a voltage-controlled oscillator which controls the frequency of an output signal in accordance with an input control signal, and a power supply voltage supply element which is driven by a signal output from the voltage-controlled oscillator and supplies a power supply voltage to the piezoelectric transformer. One power supply circuit includes a resonance frequency change unit which is connected to the output side of the piezoelectric transformer. The resonance frequency change unit drives the piezoelectric transformer of the power supply circuit at a driving frequency which is different from the driving frequency of the piezoelectric transformer in another power supply circuit by shifting the peak of the resonance frequency.
    • 在包括多个电源电路的电源装置中,每个电源电路具有压电变压器,整流元件,用于根据负载对从压电变压器输出的电压进行整流和平滑,并输出电压 控制的振荡器,其根据输入控制信号控制输出信号的频率;以及电源电压供应元件,其由从压控振荡器输出的信号驱动并将电源电压提供给压电变压器。 一个电源电路包括连接到压电变压器的输出侧的谐振频率改变单元。 谐振频率改变单元通过使谐振频率的峰值偏移来驱动电源电路的压电变压器,该驱动频率与另一个电源电路中的压电变压器的驱动频率不同。
    • 8. 发明申请
    • IMAGE FORMING APPARATUS AND STAPLER
    • 图像形成装置和装订器
    • US20120082497A1
    • 2012-04-05
    • US13252415
    • 2011-10-04
    • Osamu Nagasaki
    • Osamu Nagasaki
    • G03G15/00B27F7/36
    • B27F7/17G03G15/6544G03G2215/00827
    • An image forming apparatus having a stapler includes an image forming unit configured to form an image on a recording material, a power source configured to supply electric power to the image forming unit and the stapler, and a control unit configured to control the operation of the stapler. In the image forming apparatus, a time period for prohibiting the operation of the stapler is set such that a total of a power consumption of the image forming unit and a power consumption of the stapler is equal to or less than an electric power the power source can supply so as to perform the operation of the stapler and the operation of the image forming unit partially in parallel with each other.
    • 具有订书机的图像形成装置具备图像形成单元,被配置为在记录材料上形成图像,被配置为向图像形成单元和订书机供电的电源,以及控制单元, 订书机。 在图像形成装置中,设置用于禁止订书机的操作的时间段,使得图像形成单元的功耗和订书机的功耗的总和等于或小于电源的电力 可以供应以便彼此并行地执行订书机的操作和图像形成单元的操作。
    • 9. 发明授权
    • Image forming apparatus and power supply
    • 成像设备和电源
    • US07558501B2
    • 2009-07-07
    • US11333484
    • 2006-01-17
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiKoichi Suzuki
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiKoichi Suzuki
    • G03G15/00G03G15/16
    • G03G15/5004G03G15/163G03G15/6535G03G2215/00679G03G2215/00776H01L41/044H03L1/028
    • An image forming apparatus includes a high-voltage power supply having a piezoelectric transformer. The power supply includes a positive output voltage generation circuit and a negative output voltage generation circuit. Each of the positive output voltage generation circuit and the negative output voltage generation circuit includes a piezoelectric transformer, a piezoelectric transformer driving circuit, an output voltage detection circuit, and a drive control circuit for outputting a control signal for controlling the piezoelectric transformer driving circuit using a signal from the output voltage detection circuit and an output voltage setting signal for setting an output voltage. The positive output voltage generation circuit and the negative output voltage generation circuit are simultaneously turned on when the output polarity of the high-voltage power supply with a piezoelectric transformer is switched.
    • 图像形成装置包括具有压电变压器的高压电源。 电源包括正输出电压产生电路和负输出电压产生电路。 正输出电压产生电路和负输出电压产生电路中的每一个包括压电变压器,压电变压器驱动电路,输出电压检测电路和驱动控制电路,用于输出用于控制压电变压器驱动电路的控制信号,所述控制信号使用 来自输出电压检测电路的信号和用于设定输出电压的输出电压设定信号。 当切换具有压电变压器的高电压电源的输出极性时,正输出电压产生电路和负输出电压产生电路同时导通。