SERVO DRIVE WITH LOW TORQUE PULSATIONS Russian patent published in 2001 - IPC

FIELD: electrical engineering. SUBSTANCE: invention relates to electric servo drives designed for control of torque on shafts of mechanisms with higher requirements to torque pulsation level at slow speeds. Servo drive has shaft torque pickup electric motor coupled with mechanism shaft and consisting of toothed sector with winding and toothed windingless rotor, electric motor rotor position pickup, control unit, setter forming required signals for control unit. To reduce pulsations of torque on shaft, three-phase motor is used with 12 teeth on stator and 8 teeth on rotor. Its magnetic system is made with relative skewing of rotor and stator teeth through (0,05...0,25)t₂. Width of stator teeth crown over air gap is b_z1= (0,3...0,36)t₂, and that of rotor teeth is where t₂ is rotor tooth pitch. Device uses three-phase reaction inductor motor with specially formed geometry of tooth zone. EFFECT: simplified design of servo drive. 3 cl, 9 dwg