Showing papers by "Mauricio B. R. Correa published in 2007"
07 May 2007
TL;DR: A sensorless control scheme for a surface-mounted permanent-magnet synchronous machine (SM-PMSM) using the high frequency voltage signal injection method, which is algebraic and does not require accurate knowledge of the initial value of the rotor position.
Abstract: This paper presents a sensorless control scheme for a surface-mounted permanent-magnet synchronous machine (SM-PMSM) using the high frequency voltage signal injection method. The reactances of the high frequency model vary as a function of rotor position and a simple method based on measured high frequency currents and voltages is used to identify these reactances. Using such motor reactances, rotor position and velocity can be estimated. The proposed method is algebraic and does not require accurate knowledge of the initial value of the rotor position. The strategy was verified experimentally using a commercial SM-PMSM machine.
16 citations
07 May 2007
TL;DR: In this paper, a fault tolerant system considering a single-phase to three-phase power conversion has been proposed, where two kinds of failures occurring in the converter power devices, open circuit and short circuit, can be compensated by proposed system.
Abstract: A fault tolerant system considering a single-phase to three-phase power conversion has been proposed in this work. Two kinds of failures occurring in the converter power devices, open circuit and short circuit, can be compensated by proposed system. The fault compensation is achieved by reconfiguring the power converter topology with the help of isolation and connection devices. These devices are used to redefine the post-fault converter topology. A proposed control strategy allows to keep the post-fault topology operating at same power rate of the pre-fault one. Simulated and experimental results are presented.
5 citations
01 Mar 2007
TL;DR: In this article, the authors presented six reduced switch count ac drive systems for applications that require one high-power and one low-power machine and the overall control of the drive system is presented, including the pulse width modulation techniques.
Abstract: This paper presents six reduced switch count ac drive systems. These configurations have been conceived to operate with a four-phase and a three-phase or with a four-phase and a two-phase induction machines in a series-connected scheme. The overall control of the drive system is presented, including the pulse width modulation techniques. The proposed two-motor drive systems are seen as a potentially feasible industrial solution for applications that demand one high-power and one low-power machine. Experimental results are presented.