公开(公告)号：EP1424768A1

公开(公告)日：2004-06-02

申请号：EP02425725.5

申请日：2002-11-28

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco

IPC: H02P6/18

CPC classification number: H02P6/182

Abstract: The present invention relates to a method for detecting the angular position of a rotor in an brushless electric motor, of the type in which the emission of a polarity signal of the back electromotive force (Bemf) by a detection circuitry associated with the motor is provided. The method provides the use of a bi-directional counter for counting the residence time difference of the logic states '0' and '1' at the output of the detection circuitry.
The method is aimed at improving the detection of the instantaneous position of the rotor in a brushless motor through the detection of the zero-crossing signal.

Abstract translation: 本发明涉及一种用于检测无刷电动机中的转子的角位置的方法，其中提供了通过与电动机相关的检测电路发射反电动势（Bemf）的极性信号的类型 。 该方法提供使用双向计数器来计数在检测电路的输出处的逻辑状态“0”和“1”的停留时间差。 该方法旨在通过检测过零信号来改善无刷电动机中转子的瞬时位置的检测。

公开(公告)号：EP1258980A3

公开(公告)日：2004-02-04

申请号：EP01203450.0

申请日：2001-09-12

Applicant: STMicroelectronics S.r.l.

Inventor： Boscolo, Michele ,  Viti, Marco ,  Galbiati, Ezio

IPC: H02P6/24

CPC classification number: H02P6/24

Abstract: A driving circuit of a DC motor comprises a control circuit producing a control signal, a motor drive circuit, commanded by the control circuit, producing respective command signals for the switches of an output power stage driving the windings of the motor connected to supply lines in parallel to a filter capacitor. The driving circuit prevents generation of voltage surges of significant magnitude on the supply lines because the driving circuit has logic circuits preventing any substantial inversion of direction of flow of the current in the supply lines whenever the motor behaves as a current generator. The driving circuit implements a method of preventing generation of voltage surges on the supply lines of a DC motor comprising monitoring and comparing with a respective threshold at least a working parameter of the motor belonging to the group composed of: the voltage on the supply node of an output power stage of the motor, the voltage on at least a winding of the motor, the direction of flow of the current in the supply lines of the output power stage and the phase difference between the current circulating in at least a winding of the motor and the back electromotive force induced on the same winding; whenever at least one of the monitored parameters exceeds its respective threshold, forcing on each winding of the motor a voltage such to prevent substantial inversion of the direction of flow of the current on the supply lines.

公开(公告)号：EP0809349B1

公开(公告)日：2001-07-18

申请号：EP96830295.0

申请日：1996-05-22

Applicant: STMicroelectronics S.r.l.

Inventor： Maiocchi, Giuseppe ,  Viti, Marco

IPC: H02P6/00 ,  G06F1/035

CPC classification number: H02P23/0077 ,  G06F1/035 ,  H02P6/34 ,  Y10S388/904

公开(公告)号：EP1845610A1

公开(公告)日：2007-10-17

申请号：EP06425267.9

申请日：2006-04-14

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco

IPC: H02P6/18

CPC classification number: H02P6/182

Abstract: A monitoring device for an electric motor is disclosed; the electric motor (La-Lc) is driven in function of a preset period of electric revolution time (Tc) due to two consecutive zero crossings of the back-electromotive force (BEMF) associated with the electric motor. The device (50) has in input a signal (Pbemf) representing the zero crossings (ZC) of the back-electromotive force and comprises means (50) suitable for detecting said signal in first periods of time (Tm) arranged around instants of time (iZC(n)...iZC(n+3)) wherein the zero crossings of the back-electromotive force are expected. The device comprises means (40) suitable for setting second periods of time (Tbasket) that are less than said first periods of time (Tm) and each second period of time (Tbasket) is centred on the instant of time (iZC(n)...iZC(n+3)) wherein the zero crossing of the back-electromotive force is expected. The monitoring device comprises other means (41) suitable for testing whether each actual zero crossing (ZC) of the back-electromotive force occurs inside the second period of time (Tbasket) and further means suitable for modifying by a preset quantity (M, Mi) the subsequent period of electric revolution time (Tc) between two consecutive expected instants of zero crossing of the back-electromotive force if said actual zero crossing of the back-electromotive force occurs outside the second period of time (Tbasket). (Fig. 2)

Abstract translation: 公开了一种用于电动机的监控装置; 电动机（La-Lc）由于与电动机相关联的反电动势（BEMF）的两个连续的零交叉而以预定的电转周期（Tc）驱动。 装置（50）输入表示反电动势的过零点（ZC）的信号（Pbemf），并且包括适于在第一时间段（Tm）周期内检测所述信号的装置（50） （iZC（n）... iZC（n + 3）），其中期望反电动势的过零点。 该装置包括适于设置小于所述第一时间段（Tm）的第二时间段（Tbasket）的装置（40），并且每个第二时间段（Tbasket）以时间（iZC（n））为中心， ... iZC（n + 3））其中期望反电动势的过零点。 监控装置包括适合于测试在第二时间段（Tbasket）内是否发生反电动势的每个实际过零点（ZC）的另外的装置（41），以及适用于通过预设量（M，Mi ）如果所述反电动势的实际过零点在第二时间段（Tbasket）之外发生，则反向电动势的两个连续的预期的零交叉时刻之间的电转动时间（Tc）的后续周期。 （图2）

公开(公告)号：EP0892489B1

公开(公告)日：2005-10-05

申请号：EP98202320.2

申请日：1998-07-09

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco ,  Boscolo, Michele ,  Salina, Alberto

IPC: H02P1/00 ,  H02P6/18 ,  H02P7/62

CPC classification number: H02P6/182

公开(公告)号：EP1542350A1

公开(公告)日：2005-06-15

申请号：EP03425796.4

申请日：2003-12-11

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco

IPC: H02M7/5387 ,  H02P8/12

CPC classification number: H02M7/53875 ,  Y10S388/907 ,  Y10S388/912

Abstract: An apparatus for controlling an electric motor (1) comprising a plurality of phase windings (2-4) and a rotor is described. The apparatus comprises a plurality of driving stages (5-7) for driving respective phase windings (2-4) of he motor (1) and means (112) adapted to store the samples (CP) of reference signals (refA-refC); said driving stages (5-7) forcing currents (A-C) in accordance to each one of said reference signals (refA-refC) through a respective phase winding (2-4) of the motor (1). The apparatus comprises means (101-107) adapted to determine subdivision degree intervals (H) of an electric giro and means (108-113, Comp) adapted to compare one of the currents (A-C) flowing through the respective phase windings (2-4) of the motor (1) with at least one of the samples of the respective reference signal (refA-refC) in at least one portion of one of said degree intervals (H) and for each one of said degree intervals (H).

Abstract translation: 描述了一种用于控制包括多个相绕组（2-4）和转子的电动机（1）的装置。 该装置包括用于驱动电动机（1）的各相绕组（2-4）的多个驱动级（5-7）和适于存储参考信号（refA-refC）的样本（CP）的装置（112） ; 所述驱动级（5-7）通过所述电动机（1）的相应绕组（2-4）根据所述参考信号（refA-refC）中的每一个强制电流（A-C）。 该装置包括适于确定电气单元的细分度间隔（H）的装置（101-107）以及适于比较流过相应相绕组（2-）的一个电流（AC）的装置（108-113，Comp） （H）中的一个的至少一部分中的每个参考信号（refA-refC）的至少一个样本和所述度数间隔（H）中的每一个的至少一个样本的电动机（1） 。

公开(公告)号：EP1258980A2

公开(公告)日：2002-11-20

申请号：EP01203450.0

申请日：2001-09-12

Applicant: STMicroelectronics S.r.l.

Inventor： Boscolo, Michele ,  Viti, Marco ,  Galbiati, Ezio

IPC: H02P6/24

CPC classification number: H02P6/24

Abstract: A driving circuit of a DC motor comprises a control circuit producing a control signal, a motor drive circuit, commanded by the control circuit, producing respective command signals for the switches of an output power stage driving the windings of the motor connected to supply lines in parallel to a filter capacitor. The driving circuit prevents generation of voltage surges of significant magnitude on the supply lines because the driving circuit has logic circuits preventing any substantial inversion of direction of flow of the current in the supply lines whenever the motor behaves as a current generator.
The driving circuit implements a method of preventing generation of voltage surges on the supply lines of a DC motor comprising monitoring and comparing with a respective threshold at least a working parameter of the motor belonging to the group composed of: the voltage on the supply node of an output power stage of the motor, the voltage on at least a winding of the motor, the direction of flow of the current in the supply lines of the output power stage and the phase difference between the current circulating in at least a winding of the motor and the back electromotive force induced on the same winding; whenever at least one of the monitored parameters exceeds its respective threshold, forcing on each winding of the motor a voltage such to prevent substantial inversion of the direction of flow of the current on the supply lines.

Abstract translation: 直流电动机的驱动电路包括一个控制电路产生控制信号，马达驱动电路，由控制电路指令时，在输出的功率级的驱动连接在供给线电动机的绕组的开关产生respectivement命令信号 平行于滤波电容器。 的驱动电路，防止产生显著大小的电压浪涌的电源线上，因为驱动电路具有的逻辑电路防止在供电线路中的电流的流动的方向的任何显着反转时电机表现为电流发生器。 的驱动电路实现防止产生电压的方法激增对直流电动机的电源线包括监测和与阈值进行比较respectivement至少属于组成的组中的电动机的工作参数：上的电压 电动机的输出功率级的电源节点，在其至少绕组电动机的电压，在输出功率级和电流之间的相位差的电源线的电流的流动的方向中循环至少 一个绕组电机和感应在同一绕组的反电动势的; 每当被监视的参数中的至少一个超过其阈respectivement，迫使每个绕组的电动机的电压寻求避免电源线的电流的流动的方向的显着反转。

公开(公告)号：EP1175000A1

公开(公告)日：2002-01-23

申请号：EP00830510.4

申请日：2000-07-19

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco

IPC: H02P6/22 ,  H02P6/18

CPC classification number: H02P6/22 ,  H02P6/185

Abstract: An efficient and less critical start-up procedure for a multiphase brushless motor to be accelerated until reaching a certain speed, by determining the starting position of the rotor, forcing a drive current in the phase windings of the motor for an established period of time according to a switching sequence for inducing a rotation in the desired direction, sensing the position reached by the rotor at the end of each excitation phase, and eventually interrupting the start-up procedure when the established speed has been reached or exceeded includes the steps of increasing or reducing the duration of the next phase of excitation and modifying the switching sequence depending on the number of consecutive times in which the current position is found to be the same or different from the previously detected position, respectively.

Abstract translation: 通过确定转子的起始位置，使多相无刷电动机加速直到达到一定速度的有效且不太关键的启动程序，迫使电动机的相绕组中的驱动电流达到既定时间段 涉及用于在期望方向上引起旋转的切换顺序，感测在每个激励阶段结束时由转子达到的位置，并且当达到或超过建立的速度时最终中断启动程序包括增加 或者减少下一阶段激励的持续时间，并且根据发现当前位置与先前检测到的位置相同或不同的连续时间的数量来修改切换序列。

公开(公告)号：EP1091480A1

公开(公告)日：2001-04-11

申请号：EP99830619.5

申请日：1999-09-30

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio ,  Boscolo, Michele ,  Viti, Marco

IPC: H02P6/18

CPC classification number: H02P6/182

Abstract: A method of detecting the zero-cross event of an induced back electromotive force or of the nullification instant of a periodic current in a PWM driven winding, by circuits generating an analog signal representative of said back electromotive force or of said current, means for comparing said analog signal with zero and producing a first logic signal (READ _ZC), means for generating a PWM driving signal, means for storing the duration of the time interval between two consecutive zero-cross events, includes:

storing the value (TC) of the time interval between the last two events of zero-cross detected;
synchronizing the PWM driving signal at the end of a time interval from the instant of the last zero-cross detected of duration equal to the difference between ae time (TS) established in function of said stored value (TC) and a first prefixed value (T1);
if a new zero-cross event is not detected within said established time (TS), disabling the switching of the PWM signal for a time interval, the maximum duration of which is equal to a second prefixed value or until the occurrence of a new zero-cross event.

A hardware implementation is also described.

Abstract translation: 一种通过产生表示所述反电动势或所述电流的模拟信号的电路的电流来检测在PWM驱动绕组中的感应反电动势的零交叉事件或周期性电流的无效时刻的方法，用于比较 所述模拟信号具有零并产生第一逻辑信号（READ_ZC），用于产生PWM驱动信号的装置，用于存储两个连续零交叉事件之间的时间间隔的持续时间的装置包括：存储所述模拟信号的值（TC） 检测到零交叉的最后两个事件之间的时间间隔; 在从与所述存储值（TC）的功能建立的ae时间（TS）之间的差值等于等于所述存储值（TC）的第一前缀值（TC）之间的差值的持续时间的最后检测到的零交叉时刻之间的时间间隔结束时，将PWM驱动信号同步， T1）; 如果在所述建立的时间（TS）内没有检测到新的零交叉事件，则禁用一段时间间隔的PWM信号的切换，其最大持续时间等于第二前缀值，或直到发生新的零 交叉事件 还描述了硬件实现。

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

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco ,  Boscolo, Michele ,  Salina, Alberto

IPC: H02P1/00 ,  H02P6/18 ,  H02P7/62

CPC classification number: H02P6/182

Abstract: 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.

Abstract translation: 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。