Research on Power Balance Control of Belt Conveyor with Variable Frequency Drive

According to motor power imbalance issue during the operating process of belt conveyors, a novel control mode was proposed, the master machine ado pted close-loop frequency control, and the torque reference of the slave was provided by the master based on power tracking strategy. Both of master and slave adopte d the control mode combining direct torque control without speed sensor and space vector modulation control based on the torque distribution given, which could direct y control the torque and ensure power balance, while improving motor performance by optimizing magnetic flux. It was verified through MATLAB simulation and field tes ts that the proposed method could effectively allocate the output torque and realize power balance.