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The paper presents a new successful design of a double rotor permanent magnet synchronous machine, where special attention was paid to the outer and inner rotor construction. The machine's structure enables its use in hybrid electric vehicles as a four-quadrant drive system as well as in pure electric vehicles as a single traction motor/generator. Thus, high torque density and low torque ripple values...
The permanent magnet synchronous machine with an external rotor is the most important device for high performance electrical drive systems in particular for hybrid electric vehicles. The paper presents finite element analyses of a such a machine in terms of a comparison of both Y- and Δ-connected stator windings. The influence on the most important design parameters such as electromagnetic torque...
Design optimization environment utilizing an Electromagnetic-Team Fuzzy Logic, EM-TFL, robust identifier for use with Particle Swarm Optimization, PSO, technique is presented. The developed environment is applied in a case study to optimize various components of a prototype Hybrid Electric Vehicle, HEV, powertrain.
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...
In this paper, a brushless dual-rotor motor (BLDRM) is proposed, which eliminate the side effect of slip-rings in electrical variable transmission in hybrid electric vehicle. A corresponding finite element analysis (FEA) is used to evaluate its feasibility. The dynamic model is established and analyzed. Several interesting operation modes are discussed and the whole control system performance is evaluated...
IPMSM has been often developed for HEV because it has a high power density and a wide range of operations. However, an armature reaction occurs from the high current and also the hysteresis loss from electrical steel of rotor and stator and the magnet is pretty high due to the high speed driving. Moreover, for IPMSM, there are hardly any accurate specifications or studies to verify the loss through...
IPMSM with more than 10KW, which is used for HEV, has lower Ld-Lq since a groove was made on the Q-axis flux path of the rotor to reduce the eddy current loss in the permanent magnets. Therefore, a high reluctance torque and wide operating range can't be expected. Also in the winding layout, concentrated winding may widen the operating range; however this is needed the fractional slot or leads to...
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.
A novel low-speed axial-flux-modulated motor (AFMM) is presented. The proposed motor breaks the traditional design rule which stipulates that the pole-pair numbers of the stator and the rotor must be the same. It can be fit into the limited space such as the wheel rim of electric vehicles. Compared with those of radial-flux-modulated motor (RFMM), its manufacturing and assembling process are simple...
Considering the development and the prototype presentations of electrical and hybrid electrical vehicles over the last decade, one can see that several machine types were applied the direct current machine (DC), induction machine (IM), the permanent magnet synchronous machine (PMSM), and the switched reluctance machine (SRM). However many comparison study shows the IM or PMSM is suitable for hybrid...
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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