A holistic DC link architecture design method for multiphase Integrated Modular Motor Drives

This article describes a holistic DC link architecture design method that considers the end-application of the drive and its corresponding constraints e.g. the maximum battery ripple current for a battery-supplied inverter. Also, the levers that are available to comply with the design criteria are presented e.g. the use of interleaved carrier waves. This holistic approach will result in a feasible and performant Integrated Modular Motor Drive from an application point of view. Finally, a platform is presented that was developed for feasibility and performance assessment of various DC link architectures obtained from the holistic design approach. The platform comprises a fifteen phase integrable modular motor drive for an Axial Flux Permanent Magnet Synchronous Machine. It allows non-intrusive reconfiguration of the DC link architecture and implementation of various control strategies and interleaved PWM schemes

Predictive current control with reactive power minimization in six-phase wind energy generator using multi-modular direct matrix converter

Increasing worldwide energy demand and well known pollution effects of fossil fuels, make necessary to develop new environmentally friendly energy generation systems such as wind energy. In this research a predictive current control with reactive power reduction is proposed for a six-phase energy generator - multi-modular matrix converter system. The proposal shows a significant harmonic reduction in the generator side and a THD less than 0.6% at the load side, with good current tracking, making it suitable for further grid interconnection.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI

Modeling and analysis of dual three-phase self-excited induction generator

Multiphase self-excited induction generators have recently become more interesting due to its advantages compared to its equivalent three-phase generator. However, as an induction generator, it has some disadvantages regarding poor voltage and frequency regulation under varying load and speed regimes. A steady state analysis is fundamental to comprehend the machine’s behavior. This paper presents a detailed mathematical model and analysis of the dual three-phase self-excited induction generator. Simulation results are provided to show the behavior of the machine is build up voltage through different conditions, such as, variation of the excitation capacitance and variation of the mechanical rotor speed. For a more precise modeling, it is considered a non-linear variation of the magnetizing inductance.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI

Active and Reactive Power Control Strategy for Grid-Connected Six-Phase Generator by using Multi-Modular Matrix Converters

Este artículo propone una estrategia de control de potencia activa y reactiva basada en enfoques de control predictivo aplicados a sistemas de energía renovable conectados a la red.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI

Modeling and analysis of dual three-phase self-excited induction generator for wind energy conversion systems

This paper presents a detailed mathematical model and analysis of the dual three-phase self-excited induction generator for wind energy conversion systems connected to different loads. Simulation results are provided to show the behavior of the machine and its build up voltage through different conditions.CONACYT – Consejo Nacional de Ciencia y Tecnologí

Nonlinear backstepping with time delay estimation for six-phase induction machine

In this paper, a robust nonlinear stator currents controller based on a known nonlinear technique is proposed for a six-phase induction machine. First of all, a proportional-integral regulator is used in an outer loop to control the speed. Secondly, the inner loop based on a nonlinear method that combines the nonlinear backstepping control scheme with the time delay estimation consists of controlling the stator currents. The chosen time delay estimation method can approximate the unmeasurable rotor current while the nonlinear backstepping can achieve good tracking performances. The stability analysis of the current closed-loop error dynamics is provided based on a recursive Lyapunov function. Numerical simulations have been conducted to demonstrate the efficiency and the performance of the developed nonlinear control method for the asymmetrical six-phase induction machine.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI

Speed control of a five-phase induction motor drive using modified super-twisting algorithm

The present work proposes an alternative for the inner current control based on the modified super-twisting algorithm with time delay estimation. Simulation results were carried out to verify the performance of the proposed robust control strategy for a five-phase induction motor drive. A stability analysis is also presented.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI

Discrete-Time sliding mode with time delay estimation of a six-phase induction motor drive

This paper investigates the problem of stator current control in presence of uncertainties and unmeasurable rotor current for a six-phase induction motor drive. An inner control loop based on a robust discrete-time sliding mode with time delay estimation method is proposed to ensure the finite-time convergence of the stator currents to their desired references while the proportional-integral controller is used for the outer speed control. Sufficient conditions are established to ensure the stability of the closed-loop system. Simulation results were carried out to verify the performance of the proposed robust control strategy for a six-phase induction motor drive.CONACYT – Consejo Nacional de Ciencia y TecnologíaPROCIENCI