中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

23 records (took 0.026 seconds)

    SYSTEM AND METHOD FOR POWER FACTOR CORRECTION FREQUENCY TRACKING AND REFERENCE GENERATION
    11.
    发明公开
    SYSTEM AND METHOD FOR POWER FACTOR CORRECTION FREQUENCY TRACKING AND REFERENCE GENERATION 审中-公开
    系统和方法功率因数校正频率跟踪和-REFERENZERZEUGUNG

    公开(公告)号：EP2465189A2

    公开(公告)日：2012-06-20

    申请号：EP10808622.4

    申请日：2010-08-10

    Applicant: Emerson Climate Technologies, Inc.

    Inventor： GREEN, Charles E.

    IPC: H02M1/42 ,  H02M3/155

    CPC classification number: H02M1/4208 ,  Y02B70/126

    Abstract: A power factor correction (PFC) system includes a period determination module, a frequency generation module, an angle generation module, a signal generation module, and an angle correction module. The period determination module determines a period of an input alternating current (AC) line signal based on a time between rising edges of the input AC line signal. The frequency generation module generates a frequency based on the period. The angle generation module generates an angle based on the frequency. The signal generation module generates a sinusoidal reference signal based on the frequency and an adjusted angle. The angle correction module generates the adjusted angle based on the angle and based on a comparison of a falling edge of the sinusoidal reference signal, the period, and a rising edge of the input AC line signal.

    CONTROLLER AND METHOD FOR TRANSITIONING BETWEEN CONTROL ANGLES
    14.
    发明公开
    CONTROLLER AND METHOD FOR TRANSITIONING BETWEEN CONTROL ANGLES 审中-公开
    STEUERUNG UND VERFAHRENFÜRDENÜBERGANGZWISCHEN STEUERWINKELN

    公开(公告)号：EP2465195A2

    公开(公告)日：2012-06-20

    申请号：EP10808637.2

    申请日：2010-08-10

    Applicant: Emerson Climate Technologies, Inc.

    Inventor： GREEN, Charles E. ,  MARCINKIEWICZ, Joseph G.

    IPC: H02P27/04 ,  H02M7/48

    CPC classification number: H02P6/06 ,  H02M1/4225 ,  H02M3/1584 ,  H02P6/20 ,  H02P6/34 ,  Y02B70/126

    Abstract: A system includes a pulse-width modulation (PWM) module, a subtraction module, an error reducing module, and a summing module. The PWM module controls switching of an inverter that powers a motor. The PWM module controls the switching based on a first angle in a first mode and a second angle in a second mode. The subtraction module determines a difference between the first and second angles. The error reducing module (i) stores the difference when a transition from the first mode to the second mode is commanded and (ii) decreases a magnitude of the stored difference to zero. The summing module calculates a sum of the stored difference and the second angle. The PWM module controls the switching based on the sum in the second mode.

    Abstract translation: 系统包括脉冲宽度调制（PWM）模块，减法模块，误差减少模块和求和模块。 PWM模块控制为电机供电的变频器的开关。 PWM模块基于第一模式中的第一角度和第二模式中的第二角度来控制切换。 减法模块确定第一和第二角度之间的差异。 当命令从第一模式转换到第二模式时，误差减小模块（i）存储差异，并且（ii）将存储的差值的大小减小到零。 求和模块计算存储的差值和第二角度的和。 PWM模块基于第二模式中的和来控制切换。

Patent Agency Ranking