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This paper investigates the performances of different evolution strategies applied to slot shape optimization for a permanent magnet synchronous machine. (1,2), (1, 3) and (1,4) evolution strategies are implemented with different values of learning rate to compare their convergence and reliability.
In this paper, an automated design tool with coupled analytical and numerical methods and the application of this tool for the design of a complete machine series is demonstrated. The paper points out the advantages of combining these methods for the development of electrical machines. Prototype measurements are analyzed and critically compared to the simulation results to expose possible limitations.
This paper presents the application of the particle swarm algorithm for optimization of the stator slot-geometry of a high-speed permanent magnet synchronous machine.
A radial-radial flux compound-structure permanent-magnet synchronous machine (CS-PMSM) is an electromagnetic transmission which is integrated by two concentrically arranged electric machines. As the two electric machines share a rotor as structural and magnetic common part, their magnetic paths are coupled. The magnetic-path coupling may cause the magnetic-field interference of the two machines, which...
Optimal design of electric machine based on FEA (Finite Element Analysis) calls for much longer computation time for maintaining high accuracy. In order to compensate the excessive computation time and guarantee the reliable convergence to global optimum, the intelligent memetic algorithm is newly implemented by combining the GA (Genetic Algorithm) and the guided MADS (Mesh Adaptive Direct Search)...
Hybrid electrical vehicles (HEV), which combine the drive power of an internal combustion engine and that of one or several electrical machines (EM), are finding, due to an increasing ecological awareness, a better market acceptance nowadays. Due to the limited space available in drive trains, PM-motors, which offer high power densities, are prime candidates for such applications. This paper presents...
The influence of various design parameters on the back electromotive force (back-EMF) and its total harmonic distortion (THD) in surface type permanent magnet synchronous machine (SPMSM) is investigated in this paper. The ratio of pole angle, slot opening, pole number and size of SPMSM are chosen as the design parameters. By using analytical method based on the space harmonic analysis, the variation...
The compound-structure permanent-magnet synchronous machine (CS-PMSM), integrated by two electric machines, is a promising energy transducer for hybrid electric vehicles. The compound structure of CS-PMSM leads to a mechanical coupling problem, i.e. speed and torque of the two rotating shafts are correlated. Special rotor position detection and control are required. In this paper, a unified controller...
An axial-axial flux compound-structure permanent-magnet synchronous machine (CS-PMSM), which is a hybrid electric vehicle (HEV) power train concept, is a structural integration of two axial flux permanent-magnet synchronous machines. It is a novel electromagnetic device with dual mechanical ports and dual electric ports. In this paper, to meet the 3D flux characteristics of the CS-PMSM, several candidate...
A compound-structure permanent-magnet synchronous machine (CS-PMSM) system used for hybrid electric vehicles (HEVs) enables the combustion engine (ICE) to operate at optimum efficiency independent of road conditions, thus decreasing the emissions and fuel consumption. The key part CS-PMSM is a high integration of two electric machines. The connection way of the CS-PMSM in the HEV system is discussed...
The compound-structure permanent-magnetic synchronous machine (CS-PMSM) is a promising concept for hybrid electric vehicles (HEVs). Based on magnetic-decoupling, mathematical model of a radial-radial flux prototype machine is analyzed. A test bench was built and experiments were carried out to validate functions of CS-PMSM for HEV applications.
This paper presents rib design in the rotor of IPMSM to increase maximum power in the field weakening region without variation of PM usage, conductor and size. Rib design is critical issue in the design of IPMSM due to leakage flux of permanent magnet and dominated by mechanical strength, therefore structural analysis should be conducted and minimum thickness should be selected. Rib design also affects...
Compound-structure permanent-magnet synchronous machine (CS-PMSM), which is composed by two electric machines, is a new type of machine developed these years. It has a wide application prospect on hybrid electric vehicle (HEV). One of the main disadvantages of this machine is that as one of the rotors has armature winding in it, a brush and slip rings must be used. Some research work has been done...
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