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    17.
    发明专利
    未知

    公开(公告)号：DE60122693D1

    公开(公告)日：2006-10-12

    申请号：DE60122693

    申请日：2001-06-18

    Applicant: ST MICROELECTRONICS SRL

    Inventor： BOSCOLO MICHELE

    IPC: H02P6/14

    Abstract: The present invention relates to a method and a circuit using the method thereof for minimising the phase errors during the driving of an electric motor, and a circuit using the method thereof, having a stator winding, a permanent magnet rotor assembly, and devices able to sense a rotor position, which comprises the following steps: a) generating of a rotor position signal (10, 14, 39), by means of said devices able to sense said rotor position; b) detecting at least two information from at least two edges (11, 12; 15, 16) of said rotor position signal (10, 14, 39) inside a measure period; c) generating a driving signal (9, 13, 38), in function of said at least two information (11, 12; 15, 16) inside the measure period, so as to follow the rotor velocity.

    18.
    发明专利
    未知

    公开(公告)号：DE60202436T2

    公开(公告)日：2006-05-04

    申请号：DE60202436

    申请日：2002-02-19

    Applicant: ST MICROELECTRONICS SRL

    Inventor： GALBIATI EZIO ,  BOSCOLO MICHELE

    IPC: G11B5/55 ,  H02M7/5387 ,  H02P7/00 ,  H02P25/02

    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.

    20.
    发明专利
    未知

    公开(公告)号：DE60112447D1

    公开(公告)日：2005-09-08

    申请号：DE60112447

    申请日：2001-10-31

    Applicant: ST MICROELECTRONICS SRL

    Inventor： BOSCOLO MICHELE ,  BRAMBILLA MASSIMILIANO ,  GALBIATI EZIO

    IPC: G11B19/20 ,  H02P6/182 ,  H02P6/185 ,  H02P6/22 ,  H02P6/18

    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.

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