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1. 发明授权

US4658194A Closed loop control circuitry for step motors 失效
标题翻译：用于步进电机的闭环控制电路
公开(公告)号：US4658194A
公开(公告)日：1987-04-14
申请号：US697567
申请日：1985-02-01
申请人： Ludwig Richter , Werner Siefert , Hans-Jorg Kleis
发明人： Ludwig Richter , Werner Siefert , Hans-Jorg Kleis
IPC分类号： H02P8/14 , H02P8/22 , H02P8/32 , H02P8/00
CPC分类号： H02P8/32 , H02P8/14 , H02P8/22
摘要： Control circuitry for a self-synchronously driven step motor under closed loop control includes, for determining the rotor position, a technologically simplified back EMF waveform detector circuit which includes fewer than five operational amplifiers, and preferably only one operational amplifier, and which delivers, for each motor phase, a back EMF signal and the negative thereof. Use can be made of these signals individually or in various combinations, with the aid of a back EMF selector arrangement and an adder connected thereto, for controlling the stator field. By sum and difference formation of back EMF signals by the adder and by assigning such signals each to a respective energization state of the motor phases, the rotor can be moved by half-steps as well as full-steps, to provide a finer degree of control. Additionally it is possible with such circuitry to detect the end position of the rotor and its maximum degree of overrunning, which yield values that can be used for achieving desired damping of the rotor.
摘要翻译：用于闭环控制下的自同步驱动的步进电动机的控制电路包括用于确定转子位置的技术上简化的反电动势波形检测器电路，其包括少于五个运算放大器，并且优选仅包括一个运算放大器，并且其提供用于每个电动机相位，反电动势信号及其负极。借助于反电动势选择器装置和与其连接的加法器，可以单独或以各种组合来使用这些信号，以控制定子磁场。通过加法器对反电动势信号的和和差分形成，并且通过将这些信号分配给电动机相的各自的通电状态，转子可以通过半步以及全步进行移动，以提供更精细的程度控制。另外，这种电路可以检测转子的最终位置和其最大超越度，其产生可用于实现转子所需阻尼的值。

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