Формування низьких частот обертання та екстремальних моментів поліфункціонального електромеханічного перетворювача технологічного призначення

Abstract

FORMATION OF LOW SPEED AND EXTREME MOMENTS POLYFUNCTIONAL ELECTROMECHANICAL CONVERTER TECHNOLOGICAL PURPOSE

N. Zablodskij, V. Gritsyuk

One of the main trends of modern automatic electromechanical systems is the replacement gear on gearless drives (direct).

Screw units are part of the equipment of many technological processes of substances and require stable low speed rotation mode - 50 ÷ 175 rev/min. Dynamic modes (start, braking and overflow auger) require short-term gain dynamic moment. Traditionally structure, mechanical equipment including motors, providing a reduction of speed and torque. But while the proportion of the input energy is lost, since the efficiency of mechanical gear does not exceed 70%, there are difficulties in implementing reverse mode. In addition, the energy dissipative components of motors and gearboxes are not used and also ruled out the possibility of building systems based on electromagnetic environment for electric thermal, mechanical and magnetic treatment agents.

The purpose of research – improving the method of forming gearless low rpm and the resulting extreme moment of asynchronous drive PEMC screw type.

Obtaining a reduced rate is possible with teamwork two mechanically connected induction motors, one of which is in motor mode, the other – in generator mode braking opposition.

Power efficiency over this low because electric losses equal the sum of the loss of both engines, one of them works in opposition, and another - in motor mode with increased slip. But this method of forming the low frequency of rotation PEMC allows energy to turn these losses into useful thermal energy. Total hollow massive ferromagnetic rotor, which also serves as the actuator - screw and heater in the PEMC creates conditions to achieve higher quality factor, increase the ratio of "electromagnetic torque-current" in comparison with conventional induction motor design.

Developed and implemented an alternative method of forming a gearless polyfunctional electromechanical converters technological purpose low frequency electromagnetic torque and rotation, which fold increased relative to nominal.