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    • 17. 发明授权
    • Control device for three-phase brushless motor
    • 三相无刷电机控制装置
    • US07764030B2
    • 2010-07-27
    • US11959213
    • 2007-12-18
    • Masayasu MiyajimaJun SuzumuraToshiyuki OonishiKatsumi Ohata
    • Masayasu MiyajimaJun SuzumuraToshiyuki OonishiKatsumi Ohata
    • H02P6/16
    • H02P6/15Y10S388/928
    • A control apparatus for a three-phase brushless motor, in which a control circuit includes time interval calculation means (133 in FIG. 4). The time interval calculation means (133) is endowed with at least one time interval calculation mode. In the time interval calculation mode, pluralities of time intervals which correspond to an addition section obtained by adding up two or more Q continuous sections are calculated on the basis of two position detection signals which lie at both the ends of the addition section, among position detection signals successively generated. The control circuit determines pluralities of energization switching timings on the basis of the pluralities of time intervals. The control apparatus for the three-phase brushless motor can decrease the deviations of the energization switching timings attributed to the errors of the mounting positions of position sensors or to the errors of the magnetized positions of a rotor, without requiring any complicated adjustment.
    • 一种用于三相无刷电动机的控制装置,其中控制电路包括时间间隔计算装置(图4中的133)。 时间间隔计算装置(133)具有至少一个时间间隔计算模式。 在时间间隔计算模式中,基于位于加法部的两端的两个位置检测信号来计算与通过相加两个以上的Q连续部分而获得的相加部分相对应的多个时间间隔, 连续产生检测信号。 控制电路基于多个时间间隔来确定多个通电切换定时。 用于三相无刷电动机的控制装置可以减少归因于位置传感器的安装位置的误差或转子的磁化位置的误差引起的通电切换定时的偏差,而不需要任何复杂的调整。
    • 18. 发明授权
    • Structural speed control for electric motors
    • 电机结构速度控制
    • US3914673A
    • 1975-10-21
    • US49075774
    • 1974-07-22
    • SCOVILL MANUFACTURING CO
    • WALLIN GUS WALDEMAR
    • A47J43/08H02K23/66H02P25/18G05D13/10H02P5/30
    • H02K23/66A47J43/082H02P25/182Y10S388/928Y10S388/936
    • A speed control comprises a rotary surface having irregularlyshaped means and driven by the controlled motor. A brush assembly comprises at least part of a make-and-break circuit in series with the motor, the assembly including an engagement portion adapted to ride on the rotary surface. The brush assembly is adjustable so that the engagement portion may be placed at a setting anywhere in a path of traverse along the surface. The irregularly-shaped means causes interruptions of the make-andbreak circuit as the rotary surface rotates under the engagement portion. Because of the shape of the irregularly-shaped means, the interruptions are less in extent and/or frequency if the setting is closer to one end of the path of traverse than the other end. In other words, there is more ''''on'''' time at a setting toward said one end. Hence, the speed of the motor increases at settings toward said one end. Governor means are provided to reduce the extent and/or number of interruptions when the motor speed drops under load.
    • 速度控制包括具有不规则形状的装置并由受控电动机驱动的旋转表面。 电刷组件包括与电动机串联的制动和断路电路的至少一部分,该组件包括适于骑在旋转表面上的接合部分。 刷子组件是可调节的,使得接合部分可以放置在沿着表面的横越路径中的任何位置处的设置。 不规则形状的装置在旋转表面在接合部分的下方旋转时,导致制动和断开电路的中断。 由于不规则形状的装置的形状,如果设置比另一端更靠近横动路径的一端,则中断的程度和/或频率较小。 换句话说,在朝着所述一端的设置上有更多的“开”时间。 因此,在朝向所述一端的设定下,电动机的速度增加。 提供调速器装置以减少电机转速在负载下降时的中断程度和/或数量。