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    • 5. 发明授权
    • Pulse generator in storage drives
    • 存储驱动器中的脉冲发生器
    • US4651241A
    • 1987-03-17
    • US529018
    • 1983-09-02
    • Johann von der HeideErnst-Moritz KornerEdgar MullerRolf Muller
    • Johann von der HeideErnst-Moritz KornerEdgar MullerRolf Muller
    • G11B5/55G11B15/18G11B19/20G11B19/28G11B33/12G11B5/012
    • G11B33/121G11B15/1808G11B19/20G11B19/28G11B5/5526
    • Device for a drive for storage media for the generation of at least one index pulse per revolution of a rotating element with a generator, which, during operation, for each revolution of the rotating component, generates at least one signal pulse that alternates once between two polarities, and with an evaluating circuit activated by these alternating signal pulses to generate the index pulses at its output. The evaluating circuit includes a comparator with asymmetrical hysteresis with two inputs and one output, between the two inputs of which comparator the output signal of the generator lies, and the hysteresis of which is tuned to the generator output signal such that the comparator output sharply changes from a first to a second potential when the amplitude of the signal pulse at a preset polarity exceeds a preset switching voltage value, and sharply returns from the second to the first potential when the signal pulse passes through its zero crossing from the preset to the opposite polarity.
    • 用于存储介质的驱动器的装置,用于在具有发电机的旋转元件的每转一周产生至少一个索引脉冲,其在操作期间对于旋转部件的每次旋转产生至少一个在两个之间交替一次的信号脉冲 极性,以及由这些交变信号脉冲激活的评估电路,以在其输出端产生索引脉冲。 评估电路包括具有两个输入和一个输出的具有不对称滞后的比较器,其两个输入之间的比较器产生器的输出信号位于其上,其滞后被调谐到发生器输出信号,使得比较器输出急剧变化 当预设极性的信号脉冲的幅度超过预设的开关电压值时,从第一电位到第二电位,并且当信号脉冲从预置到相反的过零点时从第二电位急剧返回到第一电位 极性。
    • 8. 发明授权
    • Two-pulse brushless d.c. motor
    • 双脉冲无刷直流 发动机
    • US4376261A
    • 1983-03-08
    • US210409
    • 1980-11-25
    • Johann von der HeideRolf MullerBenno Doemen
    • Johann von der HeideRolf MullerBenno Doemen
    • H02K29/08H02P6/15H02K29/02
    • H02K29/08H02P6/15
    • In response to a Hall-IC sensor exposed to the magnetic field of the rotor of a brushless d.c. motor, two interleaved sequences of pulses are generated at separate outputs with an interpulse pause of a certain length occurring between successive interleaved pulses to prevent reduction of efficiency and increase of motor noise that would result from overlapping pulses being supplied to the stator of the motor. When these pulses are utilized to switch a semiconductor full bridge circuit, through which a single winding of the stator is energized by current pulses alternating in direction, prevention of short-circuits resulting from slow turn-off of the semiconductor switches is prevented. For overcurrent protection, only half of the bridge is intermittently blocked by a current regulator when the current reaches a predetermined limiting value, this provision also reducing generation of noise and interference by the motor.
    • 响应于暴露于无刷直流电机转子磁场的霍尔IC传感器。 电动机,在单独的输出处产生两个交错序列的脉冲,其中在相继的交错脉冲之间产生一定长度的脉冲间歇,以防止效率降低,并且由重叠的脉冲提供给电动机的定子引起的电动机噪声的增加。 当这些脉冲用于切换半导体全桥电路时,定子的单个绕组通过该电路通过电流脉冲在方向上交替而被激励,从而防止半导体开关缓慢断开导致的短路。 对于过电流保护,当电流达到预定极限值时,电流调节器中只有一半的桥被间歇性地阻塞,这一规定也减少了电机产生的噪声和干扰。