Energy optimized speed regulation of permanent magnet synchronous motors for driving roller conveyors

This paper provides an analysis and optimization of the power consumption for permanent magnet synchronous motors (PMSM) in the field of material handling application. Particular attention is paid to define a relation between motor power consumption, its desired rotational speed and required torque for packet movement while the motor works with constant speed. A mathematical model of PMSM power consumption for driving roller conveyors during the constant speed is provided and an approach to determine the optimum desired speed according to the packet weight is presented. Within the proposed model vector control strategy is used for motor speed control in addition to hysteresis trigger selection for the inverter. The resulting optimization method is qualified on a series of simulations and offers a potential saving margin for a pilot system.