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    Method and related device for estimating two currents flowing simultaneously through respective windings of a poly-phase electrical load driven in SVM mode
    1.
    发明公开
    Method and related device for estimating two currents flowing simultaneously through respective windings of a poly-phase electrical load driven in SVM mode 有权
    一种用于估计2倍流经与多相电气负载操作的空间矢量调制的各绕组的电流同步的方法和相应的装置

    公开(公告)号：EP1956380A1

    公开(公告)日：2008-08-13

    申请号：EP08100209.9

    申请日：2008-01-08

    Applicant: STMicroelectronics S.r.l.

    Inventor： D'Angelo, Giuseppe ,  Moselli, Giovanni

    IPC: G01R21/133 ,  H02M7/5387

    CPC classification number: G01R19/2513 ,  G01R19/2509 ,  G01R29/16 ,  H02P21/22 ,  H02P27/06

    Abstract: A method, implemented by circuital means in a device, for estimating at a certain instant two currents of a poly-phase electric load controlled in SVM mode, for example a three-phase electric motor, using the same measuring instrument, without introducing in the measurement error contributory terms due to the inevitable time lag between the two measurements carried out at different instants, comprises the steps of measuring the current flowing in one of the two windings exactly at the desired instant, measuring the current flowing in the other winding first with a certain anticipation in respect to the desired instant and after with a delay equal to the anticipation in respect to the desired instant. The estimated value of the current in the second winding is given in first approximation by the arithmetic mean of the two measured values before and after the desired instant of simultaneous measurement of the two currents.
    Therefore, the two currents can be measured with an undecremented precision using the same A/D converter connected through a multiplexer by performing the three closely sequenced sensing of electric current.

    Abstract translation: 一种方法，通过circuital手段在设备中实现，用于在多相位电负载在SVM模式控制的某一瞬间两个电流估计，对于实施例的三相电动机，使用相同的测量仪器，在不引入 测量误差由于在不同的时刻进行的两次测量之间的不可避免的时间延迟缴费方面，包括测量在两个绕组的一个中流动的电流准确地在所希望的时刻的步骤，测量在所述其他第一绕组与流动的电流 在相对于期望时刻和以等于在相对于期望时刻的预期的延迟后的一定期待。 的估计值在所述第二绕组中的电流的在第一近似由两个测量值的算术平均值之前和两个电流的同时测量的期望的时刻之后给出。 因此，两个电流可以在undecremented精度使用通过执行电流的三个紧密测序感测通过复用器连接到同一个A / D转换器来测量。

    Method and related device for estimating the currents flowing in windings of a poly-phase electrical load at a certain instant
    2.
    发明公开
    Method and related device for estimating the currents flowing in windings of a poly-phase electrical load at a certain instant 有权
    用于估计由多相电气负载的电流的各绕组在某一时刻中流动的电流的方法和相应的装置

    公开(公告)号：EP1959551A1

    公开(公告)日：2008-08-20

    申请号：EP08100347.7

    申请日：2008-01-11

    Applicant: STMicroelectronics S.r.l.

    Inventor： D'Angelo, Giuseppe ,  Moselli, Giovanni

    IPC: H02M7/5387

    CPC classification number: H02M7/53871 ,  G01R19/0092 ,  H02M2001/0009

    Abstract: A method of estimating the current flowing through a winding of a poly-phase electric load at a certain instant while keeping constant the duty-cycle of the PWM driving signals and without increasing relevantly the THD comprises the steps of imposing that between two consecutive edges of the control phases there is at least a certain minimum time, sufficient for measuring the current flowing through a DC_LINK line, but keeping symmetrical all control phases in respect to the instant of the cycle at which the current is to be determined. It is checked whether or not, in the switching cycle during which the current measurement is to be made, the edges of the control phases are sufficiently spaced one from the other. If not, switchings are purposely generated such that the control phases be always symmetrical in respect to the instant 0 or T/2, but with edges spaced one from the other by a certain minimum time.

    Abstract translation: 估计流经在某一瞬间的卷绕多相电负载的同时保持恒定的PWM驱动信号的占空比的电流的和在不增加相关地方法的THD包括两个连续的边缘之间气势做的步骤 在控制阶段至少有一定的最小时间，足够用于测量流过的电流通过DC_LINK线，但在当前的周期的瞬间保持左右对称全时控制相对于哪些是待确定。 检查是否与否，在开关周期期间哪个电流测量将被做，控制相的边缘被充分地间隔开一个从另一个。 如果不是，有意地产生检查次切换所做的控制阶段在相对于总是对称至即时0或T / 2，但与边缘通过某最小时间间隔从另一个。

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