Parameter Identification of Multiphase Induction Machines With Distributed Windings—Part 2: Time-Domain Techniques

Abstract

Multiphase drives are advantageous when high overall system reliability and the reduction in the total power per phase are required. The control strategies for these applications require a good knowledge of the machine parameters to ensure a high quality of the dynamic and steady-state drive performance. Multiphase machines are still not common in industry and it appears that very little work has been done so far in relation to parameter identification techniques. This paper presents and implements a procedure to estimate the parameters of a five-phase induction machine, which can be also extended to other multiphase machines with higher phase numbers. The method is based on standstill time-domain tests and recursive least-squares algorithms. Experimental results are provided to illustrate the developed identification method using tests on two different five-phase induction machines. Correlation with corresponding parameters obtained in Part 1 of this paper is established, where electrical parameters of the same two five-phase inverter-fed induction motor drives were identified using various procedures, based on sinusoidal excitation of the machine.

Impact of Postfault Flux Adaptation on Six-Phase Induction Motor Drives With Parallel Converters

“…A three-phase induction machine has been rewound to obtain an asymmetrical six-phase induction machine whose electrical parameters have been determined using conventional AC-time domain experiments and stand-still with inverter supply test [44][45] (see obtained results in Table 1). The six-phase machine is driven by conventional three-phase power converters from Semikron (SKS22F modules) that correspond to VSCs1 and VSCs2 in Fig.…”

Modelling and fault-tolerant control of 5-phase induction machine

“…The machine model was built as a set of differential equations and the SimPowerSystem power electronics blocks were utilized to model power converters and passive components. Necessary data used in simulation are presented in Table I and these machine parameters mainly come from [23]. Fig.…”

A Simple Braking Method for Six-Phase Induction Motor Drives With Unidirectional Power Flow in the Base-Speed Region

“…The six-phase drive consists of an asymmetrical six-phase induction machine driven by conventional two-level three-phase VSCs from Semikron (SKS22F modules). Ac-time domain and stand-still with inverter supply tests [26][27] have been used to determine the parameters of the custom-built multiphase machine. Table I shows the induction motor drive parameters and rated values.…”