METHOD TO ENSURE DURABILITY OF THREE-PHASE VALVE MOTOR BASED ON SALIENT-POLE SYNCHRONOUS MACHINE

FIELD: electricity. ^ SUBSTANCE: in the method to ensure durability of a three-phase valve motor based on a salient-pole synchronous machine at first the value of the correction angle is determined åC for angle characteristic to displace the angle characteristic relative to the torque maximum determined for a three-phase mode of operation, in which maximum of electromagnet torque is provided in a double-phase mode of the salient-pole synchronous machine operation. The value of angle åC is previously defined by setting a step-by-step increase of the angle åCi from 0 with a pitch of where n - quantity of steps at the half-period of angle characteristic, according electromagnetic torques of the valve motor are measured as M0, Ç, Mi, Mi+1 where i=1, 2, Ç n, subsequent Mi+1 and previous Mj values of the electromagnetic torques are compared. If the condition of Mi+1