Determining phase of AC mains in PWM controlled converters without voltage sensors
    3.
    发明授权
    Determining phase of AC mains in PWM controlled converters without voltage sensors 失效
    在没有电压传感器的PWM控制转换器中确定交流电源的相位

    公开(公告)号:US06459599B1

    公开(公告)日:2002-10-01

    申请号:US09872681

    申请日:2001-06-01

    IPC分类号: H02M704

    CPC分类号: H02M7/219

    摘要: In a pulse width modulation-controlled, switched bridge, DC converter, the phase angle (44, 45) of the AC mains (4) is provided without sensing the voltage thereof, by a phase-locked loop (47) having one input (75) derived (126) from the in-phase voltage command Vde* (61) and another finit (77) approximating the line frequency; the phase-locked loop is initialized at a phase angle &thgr;init(76) equal to the arctangent (124) of the in-phase Vdest, and quadrature Vqest representation of estimated line voltages ere, ese, ete (119-121) derived during an initialization cycle from reconstruction of the fundamental component of the AC main currents at a phase angle (93) changing with said frequency. Reconstruction includes providing the discrete Fourier transform (DFT, 81) of signals indicative of currents (37) in the AC mains and the inverse DFT (122) of the resultant Fourier coefficients eia, eib.

    摘要翻译: 在脉冲宽度调制控制的交换电桥DC转换器中,通过具有一个输入的锁相环(47),提供交流电源(4)的相位角(44,45)而不感测其电压, 75)从同相电压指令Vde *(61)导出(126)和接近线路频率的另一个限制(77); 锁相环在等于同相Vdest的反正切(124)的相位角维持(76)初始化,以及估计的线电压ere,e​​se,ete(119-121)的正交Vqest表示在 在以所述频率改变的相位角(93)的交流主电流的基本分量的重建之后的初始化周期。 重建包括提供表示AC电源中的电流(37)的信号的离散付里叶变换(DFT,81)和所得到的傅里叶系数eia,eib的逆DFT(122)。

    Managing an Encoder Malfunction in an Elevator Drive System
    4.
    发明申请
    Managing an Encoder Malfunction in an Elevator Drive System 有权
    管理电梯驱动系统中的编码器故障

    公开(公告)号:US20090000877A1

    公开(公告)日:2009-01-01

    申请号:US12087694

    申请日:2006-01-30

    IPC分类号: B66B1/34 B66B1/32

    CPC分类号: B66B5/0018 B66B1/3492

    摘要: An encoder failure in an elevator drive system is detected and managed. A velocity of the elevator drive system is provided by an encoder signal (60) and compared with a minimum velocity threshold (62). An encoder fault timer is incremented when the velocity is less than the minimum velocity threshold (64). The elevator drive system is disabled when the encoder fault timer reaches a fault threshold time (66).

    摘要翻译: 检测并管理电梯驱动系统中的编码器故障。 电梯驱动系统的速度由编码器信号(60)提供,并与最小速度阈值(62)进行比较。 当速度小于最小速度阈值时,编码器故障定时器递增(64)。 当编码器故障定时器达到故障阈值时间(66)时,电梯驱动系统被禁用。

    Managing an encoder malfunction in an elevator drive system
    5.
    发明授权
    Managing an encoder malfunction in an elevator drive system 有权
    管理电梯驱动系统中的编码器故障

    公开(公告)号:US08006808B2

    公开(公告)日:2011-08-30

    申请号:US12087694

    申请日:2006-01-30

    IPC分类号: B66B1/34

    CPC分类号: B66B5/0018 B66B1/3492

    摘要: An encoder failure in an elevator drive system is detected and managed. A velocity of the elevator drive system is provided by an encoder signal (60) and compared with a minimum velocity threshold (62). An encoder fault timer is incremented when the velocity is less than the minimum velocity threshold (64). The elevator drive system is disabled when the encoder fault timer reaches a fault threshold time (66).

    摘要翻译: 检测并管理电梯驱动系统中的编码器故障。 电梯驱动系统的速度由编码器信号(60)提供,并与最小速度阈值(62)进行比较。 当速度小于最小速度阈值时,编码器故障定时器递增(64)。 当编码器故障定时器到达故障阈值时间(66)时,电梯驱动系统被禁用。

    Motor drive parameters
    6.
    发明授权
    Motor drive parameters 失效
    电机驱动参数

    公开(公告)号:US06483271B1

    公开(公告)日:2002-11-19

    申请号:US09712379

    申请日:2000-11-14

    IPC分类号: H02P534

    CPC分类号: H02P29/02 H02P27/048

    摘要: The temperature (25, 33, 43) of solid state switching devices in variable speed motor drives (11, 18), such as elevator motor drives, are utilized to reduce the load on the drive, by reducing the switching frequency (50) or the commanded load (110). The choice between the preferred non-switching zero state and an alternative zero state is determined (60) by temperature (28, 34, 56) of the switched transistor's anti-parallel diode. The rate of recognizing reduced temperatures is limited (33, 34) to avoid motor speed and/or load variations. The temperature may either be measured (24, 27) or determined (70) from models utilizing manufacturer product specification and normalized thermal transient response from the transistor/diode package to a heat sink.

    摘要翻译: 通过降低开关频率(50)或降低开关频率(50)或减小开关频率(50)或减小开关频率(50)或减小开关频率(50),减少驱动器的负载,利用诸如电梯电机驱动器的变速电机驱动器(11,18)中的固态开关装置的温度 命令负载(110)。 通过开关晶体管的反并联二极管的温度(28,34,56)确定优选的非开关零状态和替代零状态之间的选择(60)。 识别降温的速度有限(33,34),以避免电机速度和/或负载变化。 可以使用制造商产品规格和从晶体管/二极管封装到散热器的归一化热瞬变响应的模型来测量(24,27)或确定(70)温度。