公开(公告)号：EP1309078A1

公开(公告)日：2003-05-07

申请号：EP01830678.7

申请日：2001-10-31

Applicant: STMicroelectronics S.r.l.

Inventor： Boscolo, Michele ,  Brambilla, Massimiliano ,  Galbiati, Ezio

IPC: H02P6/18

CPC classification number: G11B19/20 ,  H02P6/182 ,  H02P6/185 ,  H02P6/22

Abstract: The present invention refers to a method for detecting the position of a rotor of a DC motor and to the relative circuit.
According to an embodiment the method for detecting the position of a rotor of a DC motor (SM) with N phases having a plurality of windings (AV1, AV2, AV3), comprising the steps of: connecting at least two of said windings (AV1, AV2, AV3) between a first (Vcc) and a second (Gnd) prefixed voltage according to a first current path for a prefixed time (Tact); allowing the current stored in said two windings (AV1, AV2, AV3) to discharge through a second current path; comparing the voltage at the ends of one of said two windings (AV1, AV2, AV3) with a third prefixed voltage and providing a control signal when said voltage is smaller in absolute value than said third prefixed voltage; performing the above steps for each of the winding (AV1, AV2, AV3) couples of said motor (SM); detecting the position of said rotor on the base of the control signals obtained.

Abstract translation: 本发明涉及一种用于检测直流电动机的转子和相对电路的位置的方法。 根据一个实施例，用于检测具有多个绕组（AV1，AV2，AV3）的N相的直流电动机（SM）的转子的位置的方法包括以下步骤：将至少两个所述绕组（AV1 ，AV2，AV3），根据用于预定时间（Tact）的第一电流路径的第一（Vcc）和第二（Gnd）预定电压; 允许存储在所述两个绕组（AV1，AV2，AV3）中的电流通过第二电流路径放电; 将所述两个绕组（AV1，AV2，AV3）之一的端部处的电压与第三预定电压进行比较，并且当所述电压的绝对值小于所述第三预定电压时提供控制信号; 对所述电动机（SM）的绕组（AV1，AV2，AV3）对中的每一个执行上述步骤; 在所获得的控制信号的基础上检测所述转子的位置。

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：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：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。

公开(公告)号：EP1026820B1

公开(公告)日：2004-04-28

申请号：EP99830062.8

申请日：1999-02-04

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco ,  Boscolo, Michele

IPC: H02P6/22

CPC classification number: H02P6/22

公开(公告)号：EP1339163A1

公开(公告)日：2003-08-27

申请号：EP02425081.3

申请日：2002-02-19

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio ,  Boscolo, Michele

IPC: H02M7/5387 ,  H02P7/00 ,  G11B5/55

CPC classification number: H02M7/53871 ,  H02P25/034

Abstract: The present invention relates a Pulse Width Modulation (PWM)/linear driver for an electromagnetic load by a bridge circuit (15) of the type having a signal input (Vm, GND) and a signal output (OutM, OutP) and at least two conduction control inputs (C1, C2) for driving a voice coil motor (VCM) in a linear mode and in a pulse width modulation (PWM). The bridge circuit (15) is driven by a PWM converter (16) coupled to one (C1) of said two control inputs and by a linear amplifier (17) coupled to the other (C2) of said two control inputs.

Abstract translation: 本发明涉及具有信号输入（Vm，GND）和信号输出（OutM，OutP）的类型的桥式电路（15）的电磁负载的脉宽调制（PWM）/线性驱动器，以及至少两个 用于以线性模式和脉冲宽度调制（PWM）驱动音圈电机（VCM）的导通控制输入（C1，C2）。 桥式电路（15）由耦合到所述两个控制输入中的一个（C1）的PWM转换器（16）和耦合到所述两个控制输入的另一个（C2）的线性放大器（17）驱动。

公开(公告)号：EP0896422B1

公开(公告)日：2003-05-07

申请号：EP97830420.2

申请日：1997-08-08

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio ,  Boscolo, Michele ,  Bertolini, Luca

IPC: H02P1/00 ,  H02P6/08

CPC classification number: H02P6/085 ,  H02P6/28

公开(公告)号：EP1026820A1

公开(公告)日：2000-08-09

申请号：EP99830062.8

申请日：1999-02-04

Applicant: STMicroelectronics S.r.l.

Inventor： Viti, Marco ,  Boscolo, Michele

IPC: H02P6/22

CPC classification number: H02P6/22

Abstract: A start-up routine for a multiphase brushless DC motor having one or more rotor position sensors insufficient to provide for an angular resolution as high as the angular resolution of the synchronized driving system of the motor, consists in:

a) fixing of at least an angular check zone of a certain arc length angularly corr lated to the position of said sensor or sensors;
b) assessing or presuming a certain initial rest position of the rotor;
c) exciting for fixed time intervals the phase windings in a sequence such to rotate the rotor toward an angular position next to the initial position, in the desired direction, while masking the signals or digital codes of the position sensor or sensors for a preestablished masking time;
d) repeating step c) until verifying that the excited phases are those commanding advancement of the rotor toward said angular check zone, or a change of state of the signals of said position sensor or sensors, if the masking time has elapsed;
e) associating to each code of said position sensor or sensors a new angular check zone to be reached by repeating the sequence of operations starting from step c).

Abstract translation: 用于多阶段A的启动程序无刷具有一个或多个转子位置传感器不足以提供用于直流电动机在角分辨率高达发动机的同步驱动系统的角分辨率，besteht在：1）中的至少固定在 某弧长角度科尔迟来到所述一个或多个传感器的位置的角度检查区; B）assesing或假定的转子的一定的初始静止位置; c）中令人兴奋的固定的时间间隔在一个序列中的相绕组谋求转子朝向在角位置旋转旁边在期望的方向的初始位置，同时掩盖的信号或位置传感器的数字码或传感器，用于预先建立的掩蔽 时间; d）重复步骤c），直到验证已做了激发相位是朝向所述角检查区，或者如果掩蔽时间已经过去时，所述位置传感器或多个传感器，信号的状态的变化，转子的那些命令前进; E）关联到所述位置传感器或传感器一个新的角度检查区的每个代码，以通过重复从步骤c开始）操作的顺序到达。

公开(公告)号：EP0896422A1

公开(公告)日：1999-02-10

申请号：EP97830420.2

申请日：1997-08-08

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio ,  Boscolo, Michele ,  Bertolini, Luca

IPC: H02P1/00 ,  H02P6/08

CPC classification number: H02P6/085 ,  H02P6/28

Abstract: The control of the current in PWM mode through independently controlled windings of a multiphase motor driven in a "bipolar" mode is implemented by employing only two sense resistors and related control loops, regardless of the actual number of windings.

Abstract translation: 通过独立控制的以“双极”模式驱动的多相电动机的绕组来控制PWM模式中的电流通过仅使用两个检测电阻器和相关的控制回路来实现，而不管实际的绕组数量如何。