利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

18 条记录 (耗时 0.033 秒)

    CANCELLATION OF DEAD TIME EFFECTS FOR REDUCING COMMON MODE VOLTAGES
    6.
    发明申请
    CANCELLATION OF DEAD TIME EFFECTS FOR REDUCING COMMON MODE VOLTAGES 有权
    消除用于降低共模电压的死时间效应

    公开(公告)号：US20060192520A1

    公开(公告)日：2006-08-31

    申请号：US11068196

    申请日：2005-02-28

    申请人： Qiang Yin ,  Russel Kerkman ,  Richard Lukaszewski

    发明人： Qiang Yin ,  Russel Kerkman ,  Richard Lukaszewski

    IPC分类号： H02P5/34

    CPC分类号： H02M7/53873 ,  H02M2001/385 ,  H02P27/08

    摘要： Methods and apparatus for canceling dead time effects in the form of common mode voltages produced by a three-phase power conversion device in a rectifier/inverter variable frequency drive (VFD) system includes limiting the voltage difference between phase voltages at certain switching transition times to an amount δ, that is a function of the dead time that is specified for the switches and delaying gating signals to the switches to remove unexpected pulses produced by common mode voltages.

    摘要翻译： 在整流/变频变频驱动（VFD）系统中，通过三相电力变换装置产生的共模电压形式的取消死区时间效应的方法和装置包括将某些开关转换时间的相电压之间的电压差限制为 数量三角形，这是为开关指定的死区时间的函数，并延迟门控信号给开关以消除由共模电压产生的意外脉冲。

    Pulse width modulation (PWM) rectifier with variable switching frequency
    7.
    发明申请
    Pulse width modulation (PWM) rectifier with variable switching frequency 有权
    具有可变开关频率的脉宽调制（PWM）整流器

    公开(公告)号：US20060267542A1

    公开(公告)日：2006-11-30

    申请号：US11139216

    申请日：2005-05-27

    申请人： Lixiang Wei ,  Richard Lukaszewski

    发明人： Lixiang Wei ,  Richard Lukaszewski

    IPC分类号： H02P7/36

    CPC分类号： H02M7/219

    摘要： A method for controlling a device including a plurality of switching devices operated in accordance with a pulse width modulation technique includes receiving a reference voltage signal associated with a first pair of the switching devices. A switching signal is generated. The first pair of switching devices are controlled based on the reference voltage signal and the switching signal in accordance with the pulse width modulation technique. A frequency of the switching signal is varied based on the value of the reference voltage signal.

    摘要翻译： 一种用于控制包括根据脉宽调制技术操作的多个开关装置的装置的方法，包括接收与第一对开关装置相关联的参考电压信号。 产生切换信号。 基于参考电压信号和根据脉宽调制技术的开关信号来控制第一对开关器件。 开关信号的频率根据参考电压信号的值而变化。

    Rectifier for reducing current harmonics from unbalanced source
    10.
    发明申请
    Rectifier for reducing current harmonics from unbalanced source 失效

    公开(公告)号：US20060227582A1

    公开(公告)日：2006-10-12

    申请号：US11095015

    申请日：2005-03-31

    申请人： Lixiang Wei ,  Gary Skibinski ,  Richard Lukaszewski

    发明人： Lixiang Wei ,  Gary Skibinski ,  Richard Lukaszewski

    IPC分类号： H02M7/06

    CPC分类号： H02M1/126 ,  H02M7/06

    摘要： A rectifier includes a transformer, a rectifying bridge, a link capacitor, and at least a first resonance loop. The transformer is operable to receive three phase input signals having a source frequency and generate a plurality of transformer phase signals. The rectifying bridge has a number of stages corresponding to the number of transformer phase signals and is operable to generate a rectified output signal based on the transformer phase signals. The link capacitor is coupled across the rectifying bridge. The first resonance loop is coupled between the rectifying bridge and the link capacitor. The first resonance loop has a first resonance frequency corresponding to a harmonic frequency of the source frequency.