New idea - make dc-dc converter out of driving coil

A project log for Electromagnetic linear servo

Electromagnetic servo actuator for robots which will combine pneumatic speed and working principle with electronic control.

KrzysztofKrzysztof 02/04/2017 at 17:060 Comments

Had an idea yesterday to drive coil like inductor in dc-dc converters or voltage choppers. Comparators would turn upper stage mosfets on and off to maintain desired voltage which could be set from MCU with pwm and lowpass filter. Inductance would be sensed by measuring switching frequency. This frequency would be about 10-100kHz. It's far less demanding on code and inputs. Even 8bit timers can drive it but it requires one timer/counter with external inputs (or external counter).