DC-DC converter
    93.
    发明授权
    DC-DC converter 有权
    DC-DC转换器

    公开(公告)号:US07304463B2

    公开(公告)日:2007-12-04

    申请号:US11115754

    申请日:2005-04-27

    申请人: Takashi Noma

    发明人: Takashi Noma

    IPC分类号: G05F1/618 G05F1/575

    CPC分类号: H02M3/1588 Y02B70/1466

    摘要: A DC-DC converter includes an Nch FET1 which is series connected between an input terminal and an output terminal, and an Nch FET2 which is connected between the output terminal side of the Nch FET1 and a ground terminal. On the output terminal side of the circuits, a smoothing circuit and a comparator circuit are connected. The output side of the comparator circuit is connected to an on-time limiter circuit, and the on-time limiter circuit is connected to an H/S driver circuit for controlling the Nch FET1 through an inverter and directly connected to an L/S driver circuit for controlling the Nch FET2. Here, when a switching control signal for turning on the Nch FET1 is input to the on-time limiter circuit from the comparator, the on-time limiter circuit detects a time in the on state and outputs a signal by which the Nch FET1 is temporarily off controlled.

    摘要翻译: DC-DC转换器包括串联连接在输入端子和输出端子之间的Nch FET <1>和连接在输出端子侧之间的Nch FET <2> 的Nch FET 1&lt; 1&gt;和接地端子。 在电路的输出端侧连接有平滑电路和比较电路。 比较器电路的输出侧与导通时间限制电路连接,接通时间限制电路通过逆变器连接到H / S驱动电路,以控制Nch FET <1> 直接连接到用于控制Nch FET <2>的L / S驱动电路。 这里,当用于接通Nch FET <1>的开关控制信号从比较器输入到接通时间限制器电路时,接通时间限制器电路检测处于导通状态的时间,并输出 Nch FET 1暂时关闭的信号被控制。

    DC-DC converter
    96.
    发明申请
    DC-DC converter 有权
    DC-DC转换器

    公开(公告)号:US20050285585A1

    公开(公告)日:2005-12-29

    申请号:US11115754

    申请日:2005-04-27

    申请人: Takashi Noma

    发明人: Takashi Noma

    IPC分类号: G05F1/40 H02M3/158

    CPC分类号: H02M3/1588 Y02B70/1466

    摘要: A DC-DC converter includes an Nch FET1 which is series connected between an input terminal and an output terminal, and an Nch FET2 which is connected between the output terminal side of the Nch FET1 and a ground terminal. On the output terminal side of the circuits, a smoothing circuit and a comparator circuit are connected. The output side of the comparator circuit is connected to an on-time limiter circuit, and the on-time limiter circuit is connected to an H/S driver circuit for controlling the Nch FET1 through an inverter and directly connected to an L/S driver circuit for controlling the Nch FET2. Here, when a switching control signal for turning on the Nch FET1 is input to the on-time limiter circuit from the comparator, the on-time limiter circuit detects a time in the on state and outputs a signal by which the Nch FET1 is temporarily off controlled.

    摘要翻译: DC-DC转换器包括串联连接在输入端子和输出端子之间的Nch FET <1>和连接在输出端子侧之间的Nch FET <2> 的Nch FET 1&lt; 1&gt;和接地端子。 在电路的输出端侧连接有平滑电路和比较电路。 比较器电路的输出侧与导通时间限制电路连接,接通时间限制电路通过逆变器连接到H / S驱动电路,以控制Nch FET <1> 直接连接到用于控制Nch FET <2>的L / S驱动电路。 这里,当用于接通Nch FET <1>的开关控制信号从比较器输入到接通时间限制器电路时,接通时间限制器电路检测处于导通状态的时间,并输出 Nch FET 1暂时关闭的信号被控制。

    High voltage power supply device for lighting discharge tube having protection circuit and fault protection circuit
    97.
    发明授权
    High voltage power supply device for lighting discharge tube having protection circuit and fault protection circuit 失效
    具有保护电路和故障保护电路的照明放电管高压电源装置

    公开(公告)号:US06654221B2

    公开(公告)日:2003-11-25

    申请号:US09923987

    申请日:2001-08-07

    IPC分类号: H02H904

    CPC分类号: H05B41/2855

    摘要: Current flowing through a cold cathode tube is detected and converted to a voltage with a resistor, and is fed to a tube current control circuit. The tube current control circuit drives a drive circuit to control a voltage applied to a piezoelectric transformer. Current from a constant-current source is used to charge a fault protection capacitor. A transistor is allowed to conduct while current flows through the cold cathode tube so that a voltage is developed in a resistor, and thereby, an electric charge is prevented from being stored in the fault protection capacitor, thereby stopping the operation of a fault protection circuit.

    摘要翻译: 检测流过冷阴极管的电流并将其转换成具有电阻的电压,并将其馈送到管电流控制电路。 管电流控制电路驱动驱动电路来控制施加到压电变压器的电压。 来自恒流源的电流用于对故障保护电容器充电。 允许晶体管导通,同时电流流过冷阴极管,使得在电阻器中产生电压,从而防止电荷存储在故障保护电容器中,从而停止故障保护电路的操作 。

    Piezoelectric transformer inverter
    98.
    发明授权
    Piezoelectric transformer inverter 失效
    压电变压器

    公开(公告)号:US06229720B1

    公开(公告)日:2001-05-08

    申请号:US09535892

    申请日:2000-03-27

    IPC分类号: H02M112

    摘要: A piezoelectric transformer inverter can suppress ripples generated by the oscillations of a transformer, and can reduce the possibility of occurrence of beats in the inverter. In this piezoelectric transformer inverter, a switching element is disposed at a stage before an inverter circuit driving a discharge tube, and the switching element is switched on and off by switching signals from a chopper-duty control unit. Then, an input voltage is converted into a rectangular-wave voltage having a chopper circuit frequency to be supplied to the inverter circuit, and a frequency of n times a driving frequency of the inverter circuit and a chopper frequency of the chopper circuit are set in such a manner that these two frequencies are not close to each other.

    摘要翻译: 压电变压器逆变器可以抑制由变压器的振荡产生的波纹,并且可以减少逆变器中发生节拍的可能性。 在该压电变压器逆变器中,开关元件设置在逆变器电路驱动放电管之前的阶段,并且通过切换来自斩波器占空比控制单元的信号来接通和断开开关元件。 然后,将输入电压转换为具有斩波电路频率的矩形波电压供给到逆变器电路,将逆变器电路的驱动频率的n倍的频率和斩波电路的斩波频率设定在 这样的方式使得这两个频率彼此不接近。

    Piezoelectric transformer inverter
    99.
    发明授权
    Piezoelectric transformer inverter 失效
    压电变压器

    公开(公告)号:US6144139A

    公开(公告)日:2000-11-07

    申请号:US409807

    申请日:1999-09-30

    摘要: A piezoelectric transformer inverter includes: a piezoelectric transformer, one of whose primary electrodes is grounded, which performs voltage conversion of alternating voltage or direct current voltage applied between the primary electrodes and supplies the converted voltage to a load connected to a secondary electrode; a drive unit for supplying alternating voltage or direct current voltage between the primary electrodes of the piezoelectric transformer; a low-pass type resonance circuit unit inserted between the output of the drive unit and the primary electrodes of the piezoelectric transformer; a duty control unit for controlling ON-Duty of the drive unit so that a value of current flowing into the load coincides with a targeted current value; a phase-difference detection unit for detecting a phase difference between the input voltage and the output voltage of the piezoelectric transformer; and a frequency control unit for controlling a driving frequency of the drive unit.

    摘要翻译: 一种压电变压器逆变器包括:压电变压器,其一个主电极接地,其施加在主电极之间的交流电压或直流电压的电压转换,并将转换的电压提供给连接到次级电极的负载; 用于在压电变压器的主电极之间提供交流电压或直流电压的驱动单元; 插入在驱动单元的输出端和压电变压器的主电极之间的低通型谐振电路单元; 负责控制单元,用于控制驱动单元的占空比,使得流入负载的电流值与目标电流值一致; 相位差检测单元,用于检测压电变压器的输入电压和输出电压之间的相位差; 以及用于控制驱动单元的驱动频率的频率控制单元。