Sistema de acionamento estático multimáquinas CA com número reduzido de chaves.

Abstract

The drive systems with reduced number of electrical machine, become more and more important in the universe that forms industrial electronics and electrical machine drive due to factors related with cost and size of the system. In some cases one can reduce loss also. These drive systems with reduced number of power switches devices are well known in the literature and introduce some advantages in specific applications, example when there exists need of size decreasing of the drive system or when demand for cost reduction. In industrial applications where it is required to drive multiple electrical motors, the direct solution consists in replicating such standard configuration. One of the first alternatives for reducing costs in this case is to use a common dc-bus for all motor drive systems installed in the shop-floor. A second alternative to further reduce the installation costs is to use converter topologies with a minimized number of power switches, however, this method (technique) lead to constraints related with voltage capability converter and total harmonic distortion (THD). The decreasing in the number of switches can become indispensable, especially in applications with multiple machines because exists a direct relation between the increasing the amount of machines and the need increase the number of power switches to drive them.To discuss each point previously mentioned, this work addresses reduced number of power switches. The mentioned reduction will result economy. In this way this work presents different topologies for drive systems machine with reduced number of power switches devices.