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    • 3. 发明授权
    • Rotational pulse generating circuit for motors
    • 电机旋转脉冲发生电路
    • US06559616B2
    • 2003-05-06
    • US09794624
    • 2001-02-28
    • Koji AokiNobuyasu KimuraHideyuki KanieHitoshi Ishikawa
    • Koji AokiNobuyasu KimuraHideyuki KanieHitoshi Ishikawa
    • G05B1910
    • H02P7/2805H02P7/0094H02P23/16Y10S388/911Y10S388/912
    • A motor rotational pulse generating circuit for a motor is provided which generates a correct pulse signal even at an initial turning-on stage of the motor, by adjusting a filter cutoff frequency in response to motor rotational condition. The motor rotational pulse generating circuit includes a rotational pulse generation circuit 20 which generates ripple pulses based on a signal being inputted from the DC motor 1, in which a ripple is superposed whose frequency is in proportion to a rotation number of the DC motor 1. A filter 3 makes a cutoff frequency variable on the basis of a clock signal issued from a PLL circuit 6. An oscillation frequency at an oscillator VCO10 is determined by the ripple pulses and a motor rotation condition signal inputted by way of circuits 12 to 16 inclusive. A microcomputer 20 operates, when the motor is turned on, to cause the oscillator VCO10 to issue a preliminary clock signal. The microcomputer 20 measures the oscillation frequency on the basis of the resultant preliminary clock signal to judge whether or not an initial cutoff frequency of the filter 3 is correct. If the result is negative, a switching circuit 17 is controlled in switching mode to adjust an attenuance of an attenuator 16, thereby correcting the initial cutoff frequency.
    • 提供了一种用于电动机的电动机旋转脉冲发生电路,即使在电动机的初始接通阶段,也可以通过根据电动机转动状况调节滤波器截止频率来产生正确的脉冲信号。 电动机旋转脉冲发生电路包括旋转脉冲发生电路20,该旋转脉冲发生电路20基于从DC电动机1输入的信号产生脉动脉冲,其中纹波叠加,其频率与直流电动机1的转数成比例。 滤波器3基于从PLL电路6发出的时钟信号来设定截止频率。振荡器VCO10的振荡频率由纹波脉冲和电路旋转条件信号确定,电路旋转条件信号是通过电路12至16 。 微型计算机20在电动机接通时进行动作,使振荡器VCO10发出预备的时钟信号。 微型计算机20基于所得到的初步时钟信号测量振荡频率,以判断滤波器3的初始截止频率是否正确。 如果结果为负,则以开关模式控制开关电路17以调整衰减器16的衰减,从而校正初始截止频率。
    • 4. 发明授权
    • Pulse generating circuit for driving DC motor
    • 用于驱动直流电机的脉冲发生电路
    • US06456028B2
    • 2002-09-24
    • US09865670
    • 2001-05-29
    • Koji AokiHideyuki KanieHitoshi Ishikawa
    • Koji AokiHideyuki KanieHitoshi Ishikawa
    • G05B500
    • H02P7/2805H02P7/0094
    • A pulse generating circuit for motor rotation of a direct current motor which is capable of pulse generation following the variation of the motor rotation condition and of stable ripple pulse generation. The pulse generating circuit for motor rotation includes a filter for varying a cut-off frequency fc by the signal from outside and for removing the noise based on the input signal from the direct current motor, a pulse forming circuit for forming the ripple pulse in accordance with the motor rotation of the direct current motor based on the output from the filter, a clock generating circuit for varying the cut-off frequency fc of the filter by providing the clock signal fCLK which is generated based on the rotational condition signal of the ripple pulse and the direct current motor to the filter, and a pulse correction circuit for generating the corrected ripple pulse when the frequency ratio between the ripple pulse and the clock signal fCLK is deviated.
    • 一种用于直流电动机的电动机旋转的脉冲发生电路,其能够根据电动机旋转状态的变化和稳定的脉动脉冲产生而产生脉冲发生。 用于电动机旋转的脉冲发生电路包括用于通过来自外部的信号改变截止频率fc并基于来自直流电动机的输入信号去除噪声的滤波器,用于形成脉冲脉冲的脉冲形成电路 基于来自滤波器的输出的直流电动机的电动机旋转;时钟发生电路,用于通过提供基于纹波的旋转状态信号生成的时钟信号fCLK来改变滤波器的截止频率fc 脉冲和直流电动机到达滤波器;以及脉冲校正电路,用于当纹波脉冲和时钟信号fCLK之间的频率比偏离时产生校正的纹波脉冲。