Variants of Equalization of Torques in Multi Motor Electric Drives

Abstract

The paper is about the problem of load distribution in multi motor electro drives, where the torques from two or more motors are summarized on the common shaft or the common load. The motors usually are the same type and power and the common load torque is to be distributed among motors equally. But in practice load torque is distributed unequally due to motor parameters inequality and special measures are to be taken for equal distribution. Some ways to achieve equal torque distribution are possible. It may be active torque control all operating time of drive, or it may be efforts to make mechanical characteristics to be near to each other. It may be done by two parameters, or by only one parameter for simplification. The usability of this simplified way is discussed in the paper.