IPM Machine Drive Design and Tests for an Integrated Starter–Alternator Application
ABSTRACT This paper deals with an integrated starter-alternator (ISA) drive which exhibits a high torque for the engine start, a wide constant-power speed range for the engine speedup, and a high-speed generator mode operation for electric energy generation. Peculiarities of this ISA drive are thus its flux-weakening capability and the possibility to large torque overload at low speed. The focus on the design, analysis, and test of an interior permanent-magnet motor and drive for a prototype of ISA is given in this paper. In details, this paper reports on the design of stator and rotor geometries, the results of finite-element computations, the description of control system, and the experimental results of prototype tests.
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ABSTRACT: This paper describes the control strategy of an integrated starter-alternator prototype. Control specifications include a high starting torque in the low speed range as well as a smooth transition from motor to generator operation mode at higher speed. Inverter voltage limitation has to be managed during high speed operation. An interior permanent magnet synchronous machine with a fractional-slot winding is adopted. The control strategy takes advantage of the magnetic model of the electrical machine, which is well suited for flux-weakening application with advantages for the power stage ratings. Details of the control design and experimental test results are reported.Power Electronics Specialists Conference, 2008. PESC 2008. IEEE; 07/2008
Conference Paper: PM Motors for Hybrid Electric Vehicles[Show abstract] [Hide abstract]
ABSTRACT: The global warming has become a very important issue during the last decade. The worldwide research is oriented to obtain efficiency improvements on energy consuming and sustainable energy sources utilization. Hybrid electric vehicles (HEV) are able to achieve this goal. In addition the utilization of high efficiency electric machines, using high energy permanent magnet, allows an increased reduction of fuel consumption and exhaust gas emissions. This paper deals about various topologies of the permanent magnet machines and some commercial vehicles adopting these motors are described.Universities Power Engineering Conference, 2008. UPEC 2008. 43rd International; 10/2008
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ABSTRACT: This paper deals with the analysis of the torque behavior by means of finite element (FE) model. Since in synchronous PM machines, the current control imposes constant d- and q-axis currents, the FE solutions are strictly associated with the classical d - q axis theory. When using integral-slot windings, the torque computed by using the d - q axis theory is almost independent of variation of the flux linkage with the rotor position. This is not verified when fractional-slot PM motors are used. The iron saturation affects greatly the torque behaviour. In particular, the torque ripple increases significantly. A particular care to determine the average torque and the torque ripple is necessary when dealing with fractional-slot PM motors. An analysis of the iron saturation effect applied to different fractional-slot windings is provided, with a particular attention to the interior permanent magnet machines.Electrical Machines (ICEM), 2010 XIX International Conference on; 10/2010