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 adopted 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 adopted the control mode combining direct torque control without speed sensor and space vector modulation control based on the torque distribution given, which could directly control the torque and ensure power balance, while improving motor performance by optimizing magnetic flux. It was verified through MATLAB simulation and field tests that the proposed method could effectively allocate the output torque and realize power balance. [ABSTRACT FROM AUTHOR]