Multi-criteria-based design approach of multi-phase permanent magnet low-speed synchronous machines

Abstract

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.This is an author-deposited version published in: http://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/6957 To cite this version :Franck SCUILLER, Eric SEMAIL, Jean-Frederic CHARPENTIER, Paul LETELLIER -Multi-criteria based design approach of multiphase permanent magnet low speed synchronous machinesElectric Power Applications, IET -Vol. 3, n°2, p.102-110 -2009 Any correspondence concerning this service should be sent to the repository portunities for increasing torque density using the harmonics are considered. The specific constraints due to the PWM supply of multiphase machines are also taken into account during the design phase. All the defined constraints are expressed in a simple manner by using a multimachine modelling of the multiphase machines. This multimachine design is then applied in order to meet the specifications of a marine propeller: verifying simultaneously four design constraints, an initial 60-pole 3-phase machine is converted into a 58-pole 5-phase machine without changing the geometry and the active volume (iron, copper and magnet). Firstly, a specific fractional-slot winding, which yields to good characteristics for PWM supply and winding factors, is chosen. Then, using this winding, the magnet layer is designed to improve the flux focussing. According to analytical and numerical calculations, the five-phase machine provides a higher torque (about 15%) and less pulsating torque (71% lower) than the initial three-phase machine with the same copper losses.

Five-Phase Version of 12Slots/8Poles Three-Phase Synchronous Machine for Marine-Propulsion

“…Five-phase version of 12slots/8poles three-phase Synchronous Machine for Marine-propulsion Hussein Zahr (1,2) , Eric Semail (1) ( Nowadays, electrical machines are widely used in the automotive and marine propulsion. In these applications, the reliability of the propeller is required to ensure the functioning in fault mode.…”

“…In addition, given the limited volume dedicated to the propeller, the propulsion must have a high compactness. Multiphase machines have the ability to satisfy these requirements, while providing other benefits: low torque ripple, the ability to produce a significant torque using high order harmonic injection to enhance torque density [1][2][3][4][5][6] and reducing the current per phase by splitting the same power over a greater number of phases reducing the constraints on power electronics [7]. Regarding the machine design, two important criteria must be adapted to obtain the desired performance for multiphase machine: winding distribution and the geometry of permanent magnet layer.…”

General modeling of the windings for multi-phase ac machines

“…For multiphase machines (we have chosen five phases in this paper), the approach allows us to quantify the ratio between the several synchronous inductances that characterize the machine. These ratio will have a direct impact on the choice of the carrier frequency of the PWM voltage source inverter that supplies the machine [16].…”

“…In the case of multi-phase machines with more than three phases [11][12][13], the constraints on the windings are not the same since multiple spatial and time harmonics can be tolerated when implementing vector controls that ensure high quality of torque [14][15][16][17][18][19]. Moreover, the harmonics yield an increase in the performances of the drive [20,21] and a greater degree of fault tolerance in comparison with three-phase drives [22,23].…”

Speed control of Five-Phase IPMSM through PI, SMC and FITSMC approaches under normal and open phase faulty conditions

“…Because of multi-phase permanent magnet synchronous motors (PMSMs) high-power density, less current per phases, less torque ripples and fault tolerance capability, speed-drives based on these motors are receiving more attention in the last decade in some sensitive applications such as: aerospace, electric vehicles, marine and ships [1][2][3][4][5]. These motors control and supply techniques have blessed from the huge development of power electronics.…”