Proposal to increase the convertible power by an hybrid excitation flux switching synchronous machine associated with an voltage inverter. Application in hybrid or electric vehicle

Emmanuel Hoang (1) , Benjamin Gaussens (1) , Michel Lecrivain (1) , Mohamed Gabsi (1)

1 SATIE - Systèmes et Applications des Technologies de l'Information et de l'Energie

Synchronous machines associated with their voltage inverter are generally controlled in current mode. In this paper, we are interested in supplying in full-wave voltage. The second part describes the expected performance with this control mode. In the third part, we present a hybrid excitation flux switching synchronous machine (HEFSSM) whose characteristics make it a potential candidate for electric motors of hybrid or electric vehicles. The experimental results of this HEFSSM containing ferrite permanent magnets (B r =0,4T) fed in full-wave voltage to convert the maximal power are presented in the fourth part. In the last section, we present two solutions to increase the maximal convertible power, so the maximal speed in no-load mode. Keywords: hybrid excitation flux switching synchronous machine, voltage control, maximal convertible power. 1. INTRODUCTION With the development of variable speed applications, electrical machine must be able to provide high torque at low speed, with a ''cos'' as close as possible to the unit and turn at high speed with minimum losses and with constraints on its cost and its volume. To overcome this problem, the hybrid excitation flux switching synchronous machine (HEFSSM) [1] is interesting because it achieves torque performance comparable to the best permanent magnet synchronous machines and minimizes the iron losses at high speed through its hybrid excitation system. Like other electrical machines (induction and synchronous), this machine is supply by a conventional voltage inverter at two levels, with six switches. At low speed for torque control, a current control is necessary to minimize losses and torque ripple and maximize the power factor. For higher speeds, a full-wave control voltage maximizes the converted power. This command doesn't require a voltage regulating circuit, there is no PWM control and currents are sinusoidal. They are filtered with the impedance (inductive) of the phases. Note that this command in full-wave voltage minimizes the iron losses [10]. In fact, the absorbed currents create a magnetic armature reaction which takes account of all the harmonic components of voltage. In Part 2, it is recalled some elements of the theory to understand the voltage control, and we show that this command provides a maximal power conversion. Part 3 describes the HEFSSM with ferrite permanent magnets. Part 4 describes the performance obtained in full-wave voltage. Finally, in Part 5,

Domaines: Energie électrique

Emmanuel Hoang, Benjamin Gaussens, Michel Lecrivain, Mohamed Gabsi. Proposal to increase the convertible power by an hybrid excitation flux switching synchronous machine associated with an voltage inverter. Application in hybrid or electric vehicle. EVER 2015, Mar 2015, Monaco, Monaco. ⟨hal-01138301⟩