| 摘要 |
FIELD: electricity. ^ SUBSTANCE: invention can be used in automated electric drives of devices with vibrating motion of working member, vibration machines in mining industry, construction, mechanic engineering, agriculture to create oscillating motion of pendular vibration exciters for vibrating jaw breakers. The electric drive contains power source, three-phase motor stator installed on support which motor is equipped with rotor with one pair of salient poles. Resilient member is rigidly connected with support at one end and motor rotor at the other end and fixes rotor with stator in initial position when rotor longitudinal symmetry axis coincides with longitudinal symmetry axis of exiting electromagnetic field. One phase stator winding defining rotor and resilient member initial position is connected by its start with positive pole of power source with three-phase rectifier bridge and by its end is connected to two other phase stator windings connected by their starts. Ends of each one of them are connected via connected in series diodes to anodes of thyristors which have joined cathodes connected to power source negative pole and common output of pulse generator. Control electrodes of thyristors are connected to signal outputs of pulse generator, and anodes of thyristors are connected by condenser. ^ EFFECT: improvement of effectiveness through increase of rotor vibration amplitude relative to initial position depending on connection scheme of windings; vibration amplitude and electromagnetic torque regulation by changing power source DC voltage; implementation of resonant operation mode when pulse repetition frequency is set by pulse generator and coincides with natural frequency of electric drive vibrations. ^ 9 dwg |
