Current limiting circuit for stepper motor drive circuit, has supply terminal joined via resistance with control connection of first electronic switch

摘要

Stepper motor drive arrangements are generally sensitive to over-currents and short circuits, and to improve and simplify the circuit arrangement, the supply voltage is mainly directly connected via a resistance (R1) to a supply voltage terminal (U+) and to the second (GND) terminal, where the supply voltage terminal (U+) is joined via a resistance (R2) with the control connection of an electronic switch (T1), whose main switching circuit is provided directly and via a series RC-circuit to the supply voltage (+U/b, GND) and an additional electronic switch (T2).