Synchronous motor position/speed measurement device has primary part with drive coils, secondary part with magnets, two position measurement systems, two evaluation units and a comparator

摘要

The device has a primary part (1) with drive coils (3), a secondary part (2) with regularly arranged magnets (4), first and second position measurement systems with associated independent evaluation units (7,8) and a comparator (11) that ensures correct detection of position/speed values by comparing the evaluation units' outputs. The output signal of the second position measurement system results from sampling the regularly arranged magnets.