Modeling and simulation for common dc bus multi-motor drive systems based on activity cycle diagrams

In the process of industrial production, motors sometimes work in the second or fourth quadrant, namely, in the state of braking generation. In order to recycle the regenerative energy from these motors, a common DC bus, which is shared by multi-motors, could be adopted. To realize this idea, this paper presents a structure of common DC bus multi-motors AC drive system. At the same time, this paper analyzes the characteristics of common DC bus multi-motors, establishes a model for common DC bus multi-motors drive system based on discrete event dynamic systems, and simulates the power spectrum of common DC bus multi-motors. At last, an idea of scheduling optimization control strategy for multi-motors is proposed. This paper provides a theoretical basis and a simulation benchmark for making a better scheduling control strategy and energy storage/feedback control algorithm.