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    • 5. 发明申请
    • CONTROL DEVICE FOR THREE-PHASE BRUSHLESS MOTOR
    • 三相无刷马达控制装置
    • US20090001912A1
    • 2009-01-01
    • US11959213
    • 2007-12-18
    • Masayasu MiyajimaJun SuzumuraToshiyuki OonishiKatsumi Ohata
    • Masayasu MiyajimaJun SuzumuraToshiyuki OonishiKatsumi Ohata
    • H02P6/16H02P6/08
    • 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。
    • 6. 发明授权
    • Low voltage start up circuit for brushless DC motors
    • 无刷直流电机低压启动电路
    • US06741049B2
    • 2004-05-25
    • US10282921
    • 2002-10-28
    • Hideki Ted KawajiMark R. White
    • Hideki Ted KawajiMark R. White
    • H02P118
    • H02P6/22Y10S388/923Y10S388/928
    • A local oscillator and logic circuit pulses the open winding of a brushless DC motor at start up and the back EMF is used to generate a voltage to boost the voltage available to the control circuit for optimizing performance when starting with low supply voltage. As the rotor of a motor rotates and the windings are commutated by the drive electronics there is generated in each winding a voltage caused by the collapse of the current and the inherent inductance of the winding. These voltages exceed the normal operating voltage of the motor. The energy in these voltages is used to generate a regulated power feed to the analogue circuitry of the control circuit at a suitable voltage level. During steady state conditions, when the motor is running, the commutation of the windings is continual and there is ample energy available to power analogue electronics, and, if required, associated digital electronics as well. At start up, however, when the motor is stationary, there is no commutation and thus no additional voltage pulses from which to generate a supply for the analogue circuitry. Accordingly, additional circuitry is included to drive one of the motor windings with short voltage pulses such as to create inductive voltages that can be used to create the desired regulated power feed for the analogue circuitry. This feed, once established, enables the analogue circuitry to accurately determine the state and position of the rotor and cause the correct winding to be driven. The motor will then start and usual steady state conditions will become established.
    • 本地振荡器和逻辑电路在启动时脉冲无刷直流电动机的开路绕组,并且使用反电动势用于产生电压,以提高控制电路可用的电压,以便在以低电源电压启动时优化性能。 随着电机的转子旋转并且绕组由驱动电子装置整流,在每个绕组中产生由电流的塌陷和绕组的固有电感引起的电压。 这些电压超过电机的正常工作电压。 这些电压中的能量用于在适当的电压电平下产生到控制电路的模拟电路的稳压电源。 在稳态条件下,当电机运行时,绕组的换向是连续的,并且有足够的能量可用于模拟电子设备的电源,并且如果需要,也可以使用相关的数字电子设备。 然而,启动时,当电机静止时,不会有任何换向,因此没有额外的电压脉冲从而产生模拟电路的电源。 因此,包括附加电路以利用短电压脉冲驱动电动机绕组中的一个,以产生可用于产生用于模拟电路的期望的稳压电源的感应电压。 该进料一旦建立,就能使模拟电路精确地确定转子的状态和位置,并使正确的绕组被驱动。 电机然后启动,通常的稳态条件将成立。