Design Optimization and Analysis of Afpm Synchronous Machine Incorporating Power Density, Thermal Analysis, and Back-Emf THD

Kahourzade, Solmaz; Gandomkar, Ali; Mahmoudi, Amin; Rahim, Nasrudin Abd; Hew, W.P.; Uddin, M. Nasir

doi:10.2528/pier12120204

Cited by 22 publications

(12 citation statements)

References 40 publications

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“…By comparing formulas (11), (16) and (17), it can be seen that when introducing k auxiliary slots on each tooth, G n is not zero, and only when n is the multiple of (k + 1), the value of G n (not zero) will be the multiple of (k + 1) of G n . Because of the same interval, the expressions of cogging torque with or without auxiliary slots both are formula (13).…”

Section: Measure To Decrease Cogging Torquementioning

confidence: 99%

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Analysis and Reduction of Cogging Torque of Line-Start Permanent Magnet Motors

Jing¹,

Gong²,

Lin³

2019

PIER M

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Compared with a standard permanent magnet synchronous motor, a line-start permanent magnet synchronous motor (LSPMSM) has additional features that include two-sided slots on its stator and rotor. Thus, due to its complex air gap form, there is no simple method to calculate the cogging torque of this kind of motor at present. This paper presents a new analytical method that models the rotor as an equivalent magnetic motive force (MMF) distribution in the air gap which avoids the influence of rotor slotting in the air gap. Based on the energy method, an analytical method is presented here to analyze the pole-slot match of stator and the influence of number of slots per pole of rotor on the cogging torque. The effect of auxiliary slots on cogging torque of LSPMSM is studied, and by changing the number of auxiliary slots to reduce the cogging torque, the correctness of the above method has been validated by the finite element method.

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Section: Measure To Decrease Cogging Torquementioning

confidence: 99%

“…The air gap shape is complex for an LSPMSM with two-sided slots which makes it difficult to perform its cogging torque analysis. Moreover, it also makes it difficult to use the cogging torque analysis method for PM with one-sided slots [14][15][16][17][18][19]. Reference [20] divides the air gap of LSPMSM into stator side and rotor side.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Reduction of Cogging Torque of Line-Start Permanent Magnet Motors

Jing¹,

Gong²,

Lin³

2019

PIER M

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“…In [23], an AC/DC series-connected converter system suitable for direct-drive wind turbines was presented. Direct-drive axial flux PM machines can achieve a high power density in wind turbine systems [26], [27]. They overcome the need for a gearbox with its associated maintenance demands.…”

Section: A Transformerless Power Conversion Topologiesmentioning

confidence: 99%

High-Power-Density Power Conversion Systems for HVDC-Connected Offshore Wind Farms

Parastar¹,

Seok²

2013

Journal of Power Electronics

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Offshore wind farms are rapidly growing owing to their comparatively more stable wind conditions than onshore and land-based wind farms. The power capacity of offshore wind turbines has been increased to 5MW in order to capture a larger amount of wind energy, which results in an increase of each component's size. Furthermore, the weight of the marine turbine components installed in the nacelle directly influences the total mechanical design, as well as the operation and maintenance (O&M) costs. A reduction in the weight of the nacelle allows for cost-effective tower and foundation structures. On the other hand, longer transmission distances from an offshore wind turbine to the load leads to higher energy losses. In this regard, DC transmission is more useful than AC transmission in terms of efficiency because no reactive power is generated/consumed by DC transmission cables. This paper describes some of the challenges and difficulties faced in designing high-power-density power conversion systems (HPDPCSs) for offshore wind turbines. A new approach for high gain/high voltage systems is introduced using transformerless power conversion technologies. Finally, the proposed converter is evaluated in terms of step-up conversion ratio, device number, modulation, and costs.

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“…According to literature [8,9], machine designers realize the optimization studies by considering the total or local parameters, such us, weight, cost, power density, cogging torque. In order to compensate their goal, have been applied a number of optimization techniques such as genetic algorithms, pattern search, sequential nonlinear programming, response surface, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, the response surface method has been performed in many designs such as PM synchronous motor, brushless dc motor, double fed induction motor, linear machine, reluctance motor, actuators, transformers . For instance, Kahourzade et al [8] have studied the optimization of a 1 kW, three phase, 4 pole axial machine via a genetic algorithm. They used back-EMF and power density as main optimization parameters.…”

Section: Introductionmentioning

confidence: 99%

Design optimization study of a torus type axial flux machine

Arslan

Kurt

Akizu

et al. 2018

Journal of Energy Systems

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Axial flux machines are used frequently in wind energy applications due to their high power densities and efficiencies. However, the parametrical dependencies of those generators affect the generated power and efficiencies. For instance, turbine blade structures dimensions, change dramatically the speed and torque characteristics. Hence, this study includes a pursuit of optimization and the related design parameters for an axial generator in terms of its off grid operations. The analytical design relations and simulated data have shown that the geometric dimensions and morphology of the machine can be analyzed effectively under the finite element method and the optimization of the machine can be provided with a good accuracy by applying the response surface optimization. Cogging torque and power density formulated aim function gives a good optimization for the design. According to this approach, the general performance of the machine is maximized and the cogging torque and weight are kept to be decreased. Design variables are optimized by considering the generator size. Consequently, an optimal 4.8% increase in weight can yield to a 27.4% power enhancement in the machine.

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Design Optimization and Analysis of Afpm Synchronous Machine Incorporating Power Density, Thermal Analysis, and Back-Emf THD

Cited by 22 publications

References 40 publications

Analysis and Reduction of Cogging Torque of Line-Start Permanent Magnet Motors

Analysis and Reduction of Cogging Torque of Line-Start Permanent Magnet Motors

High-Power-Density Power Conversion Systems for HVDC-Connected Offshore Wind Farms

Design optimization study of a torus type axial flux machine

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