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    A method of pwm driving a brushless motor with digitally stored voltage profiles with reduced losses
    3.
    发明公开
    A method of pwm driving a brushless motor with digitally stored voltage profiles with reduced losses 有权
    与数字存储的电压分布和降低损失的无刷电动机的PWM驱动的方法

    公开(公告)号：EP0955722A1

    公开(公告)日：1999-11-10

    申请号：EP99200465.5

    申请日：1999-02-19

    Applicant: STMicroelectronics S.r.l.

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

    IPC: H02P7/00 ,  H02P6/08 ,  H02P6/14

    CPC classification number: H02P6/085 ,  H02P6/14

    Abstract: A method of driving a multiphase brushless motor with N windings connected in a star or in a polygonal configuration and driven according to a certain periodic voltage profile includes cyclically keeping for a certain time interval at least one of the N windings in a fixed state of low or high saturation by applying to the other phase windings instantaneous voltages according to a predefined different periodic voltage profile such that the resultant voltages on the windings are coherent with the certain periodic voltage profile. The number of intervals, in an entire electric period, in which said fixed high or low saturation state of one winding is produced, depends on the predefined driving profile and upon the number N of windings of the motor.

    Abstract translation: 驱动具有星形连接或多边形构造和驱动雅丁到一定周期性的电压分布N个绕组的多相无刷电动机的方法，包括循环地保持为一定的时间间隔的N个绕组的至少一个中的低固定状态 或高饱和度通过向其它相绕组瞬时电压gemäß预定义不同的周期电压分布的调查做了绕组产生的电压是一致的与某些周期性的电压曲线。 间隔的中到整个电动周期的数目，其中，所述固定一个绕组中产生的高或低的饱​​和状态，依赖于预定义的驾驶概况并且在电动机的绕组的数目N.

    System for increasing the definition in converting a digital datum in a PWM signal for driving a full-bridge output stage
    4.
    发明公开
    System for increasing the definition in converting a digital datum in a PWM signal for driving a full-bridge output stage 失效
    系统，用于提高分辨率的数字数据转换成PWM信号，用于控制全桥输出级

    公开(公告)号：EP0892500A1

    公开(公告)日：1999-01-20

    申请号：EP97830361.8

    申请日：1997-07-17

    Applicant: STMicroelectronics S.r.l.

    Inventor： Maiocchi, Giuseppe ,  Galbiati, Ezio

    IPC: H03M1/82 ,  H02M7/5387

    CPC classification number: H03M1/825 ,  H02M7/53873

    Abstract: The definition of conversion of a digital value in a PWM signal using an N-bit up/down counter is improved by increasing the dimension of the input datum to N+2 bits, using the two lsb of the N+2 input datum for selecting one among three intermediate levels between two consecutive values of an N-bit dynamic, according to a predefined table of combinations. The converter may still use an N-bit comparator.

    Abstract translation: 使用N位加/减计数器中的PWM信号的数字值的转换的定义是通过增加输入日期N + 2个比特的尺寸提高，使用两个LSB的N + 2输入的日期的用于选择 一个之中的N比特动态，gemäß的两个连续值之间的三个中间水平，以组合的预定义的表。 所述转换器可以关闭使用n位比较器的。

    PWM/linear driver for an electromagnetic load
    7.
    发明公开
    PWM/linear driver for an electromagnetic load 有权
    Lineare PWM-Regelungfüreine elektromagnetische最后

    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。

    Current control in driving DC-brushless motor with independent windings
    9.
    发明公开
    Current control in driving DC-brushless motor with independent windings 失效
    Wicklungen StromsteuerungfüreinenbürstenlosenGleichstrommotor mitunabhängigenWicklungen

    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。

    Prevention of noise due to concurrent signals of H-bridge driving of a voice coil motor
    10.
    发明公开
    Prevention of noise due to concurrent signals of H-bridge driving of a voice coil motor 有权
    防止由于竞争信号紊乱的音圈电动机的H桥的控制

    公开(公告)号：EP1865505A1

    公开(公告)日：2007-12-12

    申请号：EP06425391.7

    申请日：2006-06-09

    Applicant: STMicroelectronics S.r.l.

    Inventor： Maiocchi, Giuseppe ,  Galbiati, Ezio ,  Boscolo Berto, Michele

    IPC: G11B15/18 ,  H02P7/00 ,  H02P6/08

    CPC classification number: G11B5/02 ,  G11B5/022 ,  G11B2005/001 ,  H02P25/034

    Abstract: Usually the control power signal lines of a positioning voice coil motor (VCM), driven in a PWM or PSM mode, and the relatively low power signal lines of a read/write (R/W) head runs parallel to each others along a unique flat cable that connects the VCM moved arm carrying the head to the related drive control and signal processing circuitries of a disk storage device. When controlling the VCM at relatively low current levels, both PSM drive signals approach the 50% duty cycle and therefore the PSM commutations become so close each others that may practically be considered concurrent. In these conditions of operation, switching energies sum and reach a level that may be sufficient to inject switching noise from the VCM power lines in adjacent low level signals lines of the connection flat cable.
    A way of preventing concurrent commutations of a pair of PSM drive signals of an output bridge stage driving a voice coil motor (VCM), consists in establishing a certain threshold level of programmed current to be forced the voice coil motor and when the level of the programmed current to be forced through the voice coil motor drops below said threshold, enhancing the time offset between commutation edges of the two PSM drive signals by a certain minimum time. This is accomplished either by phase shifting one of the signals from the other signal or by broadening the width of the pulses of one of the two PSM drive signals and by narrowing the width of the pulses of the other PSM drive signal, while maintaining constant the individual duty-cycle of each drive signal.

    Abstract translation: 通常在PWM或PSM方式驱动的定位的音圈电机（VCM），和一个读/写的相对低功率的信号线（R / W）磁头平行于彼此沿一个唯一的功率控制信号线 扁平电缆连接VCM并移动臂承载头到磁盘存储装置的相关驱动控制和信号处理电路系统。 当控制在相对较低的电流水平的VCM，这两个PSM驱动信号接近50％的占空比，因此PSM减刑变得如此接近eachothers也几乎可以被认为是并发的。 在操作中的合成条件，交换能量求和并达到一个电平都可以足以注入从在连接扁平电缆的相邻低电平的信号线的电力线VCM开关噪声。 防止一对输出桥级驱动的音圈电动机（VCM）的PSM驱动信号的同时换向，besteht在建立编程电流的某个阈值电平的方式被强制音圈电机和时的水平 编程电流通过音圈马达降到低于所述阈值被强制，从而增强时间由某最小时间两个PSM驱动信号的换向边缘之间的偏移量。 这是通过相移与其它信号的信号的一个或一个通过加宽两个PSM驱动信号中的一个的脉冲的宽度和通过缩小其它PSM驱动信号的脉冲的宽度来实现无论哪种，同时保持恒定的 每个驱动信号的各个占空比。

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