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    • 1. 发明授权
    • Calibration technique of a BEMF detector
    • BEMF检测器的校准技术
    • US06463211B1
    • 2002-10-08
    • US09693499
    • 2000-10-20
    • Roberto PeritoreAlberto SalinaAndrea MerelloLorenzo PapilloFrancesco VavalaGianluca Ventura
    • Roberto PeritoreAlberto SalinaAndrea MerelloLorenzo PapilloFrancesco VavalaGianluca Ventura
    • H02P500
    • G11B5/5526
    • The present invention relates to the positioning of the read/write transducer heads of an hard disk (HD) in a designated landing zone when requested or when the electrical power is removed from the drive. In particularly it relates to the detection of the back electromotive force (BEMF) of the motor involved in the positioning of the read/write transducer heads. According to an embodiment of the present invention a BEMF detection circuit for a voice-coil motor operative to continually generate a signal proportionally to the velocity of said voice-coil motor comprises a algebraic summing node producing at its output the BEMF of the voice-coil motor and receiving: a first voltage proportional to the voltage across the voice-coil motor; a second voltage representing the product of a first multiplier factor and a voltage proportional to the current in the coil; a third voltage representing the product of a prefixed bias voltage Vref and a second multiplier factor; said third voltage is calibrated by a single calibration circuitry operative to calibrate said second multiplier factor in response to a calibration control signal, in order to cancel said second voltage.
    • 本发明涉及当请求时或当从驱动器移除电力时将硬盘(HD)的读/写换能器头定位在指定的着陆区中。 特别地,其涉及在读/写换能器头的定位中涉及的电动机的反电动势(BEMF)的检测。 根据本发明的实施例,用于音圈电机的BEMF检测电路可操作以连续地产生与所述音圈电动机的速度成比例的信号,包括代数求和节点,在其输出端产生音圈的BEMF 电机和接收:与音圈电机两端的电压成比例的第一电压; 代表第一乘数和与线圈中的电流成正比的电压的乘积的第二电压; 代表预置偏置电压Vref和第二乘数的乘积的第三电压; 所述第三电压由单个校准电路校准,所述单个校准电路用于响应于校准控制信号校准所述第二乘法器因数,以便消除所述第二电压。
    • 2. 发明授权
    • System for controlling the motion of an arm carrying a read/write head during load and unload operations
    • 用于在加载和卸载操作期间控制携带读/写头的臂的运动的系统
    • US06363214B1
    • 2002-03-26
    • US09661754
    • 2000-09-14
    • Andrea MerelloGianluca VenturaRoberto Peritore
    • Andrea MerelloGianluca VenturaRoberto Peritore
    • H02P300
    • G11B21/12G11B5/54
    • A method for controlling an electromagnetic actuator having an arm connected thereto uses a circuit that temporarily places in a high impedance state output nodes connected to a winding of the electromagnetic actuator. A detected BEMF is compared with a lower threshold and an upper threshold. Current in the electromagnetic actuator is monitored and controlled. A current pulse is provided to the electromagnetic actuator based upon the comparison of the detected BEMF with the lower and upper thresholds. The respective amplitudes of successively provided current pulses having a same polarity are progressively increased, and an amplitude of a provided current pulse having a polarity opposite a polarity of a preceding current pulse is decreased. The amplitude of the driving current pulses provided to the winding of the electromagnetic actuator advantageously adapts automatically to varying frictional conditions, or to any other cause of variation of the mechanical load of the actuator. These conditions occur when the arm moved by the electromagnetic actuator starts to slide up or flies off the parking ramp.
    • 用于控制具有与其连接的臂的电磁致动器的方法使用暂时放置在连接到电磁致动器的绕组的高阻抗状态输出节点的电路。 将检测到的BEMF与下阈值和上阈值进行比较。 监测和控制电磁执行器中的电流。 基于检测到的BEMF与下限和上限阈值的比较,向电磁致动器提供电流脉冲。 具有相同极性的连续提供的电流脉冲的相应幅度逐渐增加,并且具有与前一电流脉冲的极性相反的极性的所提供的电流脉冲的幅度减小。 提供给电磁致动器的绕组的驱动电流脉冲的振幅有利地自动地适应于变化的摩擦条件或致动器的机械负载变化的任何其它原因。 当电磁执行器移动的手臂开始向上滑动或从停车斜坡飞走时,会发生这些情况。
    • 4. 发明授权
    • Drive system for activating/deactivating motion transmission in sailing boats
    • 用于启动/停用帆船运动传动的驱动系统
    • US07422196B2
    • 2008-09-09
    • US11145114
    • 2005-06-03
    • Francesco Binetti PozziAndrea Merello
    • Francesco Binetti PozziAndrea Merello
    • B66D1/14
    • B63H9/10
    • The invention refers to a drive system of the servo-pneumatic type for activating/deactivating motion transmissions in sailing boats. The drive system of the invention is adapted to activate/deactivate motion transmission operating configurations, or for shifting from one motion transmission operating configuration to another one, when a drive is given by a crew member, much more rapidly than with the mechanical drive systems known in the art. The drive system of the invention can be used, for example, for activating/deactivating the motion transmission between pedestals and/or between pedestals and winches, or for driving the shift from one winch speed to another one, or to prevent the deactivation of a first winch speed when shifting from a first speed to a second speed, or also for driving any speed multiplier connected to the winches.
    • 本发明涉及一种用于在帆船中启动/停用运动传动的伺服气动式的驱动系统。 本发明的驱动系统适于激活/停止运动传动操作配置,或者当驾驶员由机组人员给出时,从一个运动传动操作配置转换到另一个运动传动操作配置,比已知的机械驱动系统快得多 在艺术。 本发明的驱动系统可以用于例如用于启动/停用基座之间和/或基座和绞盘之间的运动传递,或者用于驱动从一个绞盘速度到另一个的转换,或者防止 从第一速度转换到第二速度时的第一绞车速度,或用于驱动连接到绞盘的任何速度倍增器。
    • 9. 发明申请
    • Drive system for activating/deactivating motion transmission in sailing boats
    • 用于启动/停用帆船运动传动的驱动系统
    • US20060169963A1
    • 2006-08-03
    • US11145114
    • 2005-06-03
    • Francesco Binetti PozziAndrea Merello
    • Francesco Binetti PozziAndrea Merello
    • B66D1/10
    • B63H9/10
    • The invention refers to a drive system of the servo-pneumatic type for activating/deactivating motion transmissions in sailing boats. The drive system of the invention is adapted to activate/deactivate motion transmission operating configurations, or for shifting from one motion transmission operating configuration to another one, when a drive is given by a crew member, much more rapidly than with the mechanical drive systems known in the art. The drive system of the invention can be used, for example, for activating/deactivating the motion transmission between pedestals and/or between pedestals and winches, or for driving the shift from one winch speed to another one, or to prevent the deactivation of a first winch speed when shifting from a first speed to a second speed, or also for driving any speed multiplier connected to the winches.
    • 本发明涉及一种用于在帆船中启动/停用运动传动的伺服气动式的驱动系统。 本发明的驱动系统适于激活/停止运动传动操作配置,或者当驾驶员由机组人员给出时,从一个运动传动操作配置转换到另一个运动传动操作配置,比已知的机械驱动系统快得多 在艺术。 本发明的驱动系统可以用于例如用于启动/停用基座之间和/或基座和绞盘之间的运动传递,或者用于驱动从一个绞盘速度到另一个的转换,或者防止 从第一速度转换到第二速度时的第一绞车速度,或用于驱动连接到绞盘的任何速度倍增器。