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8 条记录 (耗时 0.012 秒)

    PWM drive system in a current mode.
    5.
    发明公开
    PWM drive system in a current mode. 失效
    Integriertes AntriebssystemfürPulsbreitenmodulation in Strombetriebsart

    公开(公告)号：EP0911954A1

    公开(公告)日：1999-04-28

    申请号：EP97830533.2

    申请日：1997-10-23

    申请人： STMicroelectronics S.r.l.

    发明人： Salina, Alberto ,  Brambilla, Donatella

    IPC分类号： H02P7/00

    CPC分类号： H02P25/034 ,  H02P7/04

    摘要： In a current mode, PWM integrated drive system of an external load (VCM) a switched-capacitor amplifier with a Sample & Hold stage connected in cascade thereto as the current sensing amplifier of the control loop, overcomes the criticality of inevitable resistive mismatchings, thus permitting a scaling down of the integrated drive system while preserving a high precision.

    摘要翻译： 在当前模式中，外部负载（VCM）的PWM集成驱动系统具有与其级联连接的采样和保持级的开关电容放大器作为控制回路的电流感测放大器，克服了不可避免的电阻失配的关键性，因此 允许集成驱动系统缩小，同时保持高精度。

    Monitoring of current in an inductive load, PWM driven through a bridge stage
    6.
    发明公开
    Monitoring of current in an inductive load, PWM driven through a bridge stage 失效
    在einer durch eine的StromüberwachungBrückenstufepulsbreitengesteuerten induktiven Last

    公开(公告)号：EP0897213A1

    公开(公告)日：1999-02-17

    申请号：EP97830421.0

    申请日：1997-08-11

    申请人： STMicroelectronics S.r.l.

    发明人： Galbiati, Ezio ,  Salina, Alberto

    IPC分类号： H02M7/5387

    CPC分类号： H02M7/53871 ,  H02M2001/0009 ,  H02M2003/1555 ,  H02P6/28 ,  H02P25/034

    摘要： The monitoring the current lowing through an inductive load driven through a bridge power stage in a PWM mode, by using a pair of complementary periodic reference signals and amplifying by a sensing amplifier the signal existing on of a current sensing resistor functionally connected in series with the load, for producing an amplified signal representative of the current in the load to be fed to an input of an error amplifier driving a power amplifier of said bridge stage, comprises sampling the signal output by the sensing amplifier with a Sample & Hold circuit comprising a sampling switch and a storing capacitor. The average value of the current in the load in monitored by sampling at an instant half way an active driving phase and at an instant half way a current recirculation phase by closing the switch with a synchronizing pulse that coincides with the half instant of said phases of operation. The synchronizing pulse is generated in coincidence with the peak and with the virtual zero crossing of said two reference periodic signals, outphased by 180 degrees. A two-input logic AND gate, combining said synchronizing pulse and a masking signal of a preestablished duration generated at every switching of said bridge stage may also be employed.

    摘要翻译： 通过使用一对互补的周期性参考信号并通过感测放大器放大电流感测电阻器上存在的电流信号，通过在PWM模式下通过桥式功率级驱动的感性负载来监测电流下降，该电流检测电阻与 负载，用于产生表示要馈送到驱动所述桥接级的功率放大器的误差放大器的输入端的负载中的电流的放大信号，包括由采样保持电路采样，包括采样保持电路 采样开关和存储电容器。 通过在瞬时半途中进行采样来监视的负载中的电流的平均值，并且在瞬间的一半时间通过用同步脉冲关闭开关，该同步脉冲与所述相位的半个时刻相符 操作。 同步脉冲与峰值和所述两个参考周期信号的虚拟过零点一致地产生，偏离180度。 组合所述同步脉冲和在所述桥接台的每次切换时产生的预先建立的持续时间的屏蔽信号的双输入逻辑与门也可以采用。

    Detection of instantaneous position of the rotor of a brushless DC motor driven in a tripolar mode
    7.
    发明公开
    Detection of instantaneous position of the rotor of a brushless DC motor driven in a tripolar mode 失效
    测量的转子，在三极模式驱动的瞬时位置无刷直流电动机

    公开(公告)号：EP0892489A1

    公开(公告)日：1999-01-20

    申请号：EP98202320.2

    申请日：1998-07-09

    申请人： STMicroelectronics S.r.l.

    发明人： Viti, Marco ,  Boscolo, Michele ,  Salina, Alberto

    IPC分类号： H02P1/00 ,  H02P6/18 ,  H02P7/62

    CPC分类号： H02P6/182

    摘要： The sensing of the rotor position for synchronizing the drive of a multiphase brushless motor when driven in a "multipolar" mode is carried out by interrupting the driving current in at least one of the windings of the motor coupled with a zero-cross sensing circuit of the BEMF signal (BEMF DETECT CIRCUIT), by means of a first logic signal (ENABLE), enabling a logic gate (AND) for asserting a zero-cross event detected by the circuit, by a second logic signal (MASK) and simultaneously resetting the first (ENABLE) and second (MASK) signals after a certain period of time from the instant of interruption.

    摘要翻译： 用于同步的多相无刷电动机。当在“多极”模式驱动的驱动转子位置的感测，通过中断在加上的零交叉检测电路的电动机的绕组的至少一个的驱动电流下进行 BEMF信号（BEMF DETECT电路）由第一逻辑信号（使能）的手段，从而实现一个逻辑门（AND），用于通过一第二逻辑信号（MASK）断言由电路检测到的过零事件，并同时复位 从中断的时刻的一定时间后的第一个（ENABLE）和第二（MASK）信号。