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专利名称：Method and circuit arrangement for
controlling current in motors
发明人：Bernhard Dwersteg申请号：US13509801申请日：20101118公开号：US09030150B2公开日：20150512
专利附图：
摘要：A method and circuit arrangement for controlling the motor current in anelectric motor, in particular a stepper motor, by a chopper method is provided. In themethod/circuit arrangement, the motor is operated with a coil current that follows a
target coil current substantially more accurately at least at the zero crossing of the coilcurrent. The method/circuit arrangement provides a good symmetry of the sinusoidalwave shape of the coil current with respect to the zero crossing of the coil current. Themethod is achieved in particular by the active control of the coil current both in thedirection of a predefined target coil current and opposite the direction of the predefinedtarget coil current with respect to upper or lower desired current values and a loweringor increasing of the upper or lower desired current values.
申请人：Bernhard Dwersteg
地址：Hamburg DE
国籍：DE
代理机构：WRB-IP LLP
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