Water-Pumping Permanent Magnet Synchronous Motor Optimization Based on Customized Torque-Speed Operating Area and Performance Characteristics

The need to reduce water pumps size to achieve compact designs adapted to multiple working points opens new fields of study. PMSMs are the preferred choice due to outstanding torque-speed range capabilities. This paper presents a methodology to design and optimize PMSMs by defining the desired torque-speed-efficiency map, adapting its performance to the hydraulic characteristics of the water pump. Once the hydraulic efficiency is known, an initial PMSM reference torquespeed-efficiency map is defined according to the objective motor performance, including the distribution of power losses and the power rating of the selected application. The designer has full freedom to define the efficiency levels and distribution along the torque-speed map. The design optimization algorithm achieves the PMSM characteristics which adjust as much as possible to the defined performance. This methodology uses ultra-fast finite element analysis by applying magneto-static computations and a time-space conversion to compute the iron losses, reducing the computational requirements. The torque-speed-efficiency map is calculated by applying a direct-quadrature electrical model. The objective function uses a novel image comparison technique that allows comparing the similarity between the objective and optimized maps. The methodology is validated experimentally by designing and testing a PMSM adapted to a real WP application.

show abstract

“…The mechanical losses considered in this model are mainly due to the bearings and rotor. These losses are considered in an external model [27].…”

Section: Inputsmentioning

confidence: 99%

Customized PMSM Design and Optimization Methodology For Water Pumping Applications

Candelo-Zuluaga

Riba

Espinosa

et al. 2022

IEEE Trans. Energy Convers.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Once the efficiency-torque-speed map of the current geometry has been obtained from the d-q electrical model, it is necessary to compare how close it is with respect to the target or reference map. To this end, the structural similarity index SSIM is applied [17], [20]. This index returns a normalized value between 0 and 1 to indicate the degree of similarity between two images.…”

Section: D-q Model Computation and Efficiency-torque-speed Maps Comparisonmentioning

confidence: 99%

PMSM Design for Achieving a Target Torque-Speed-Efficiency Map

Candelo-Zuluaga

Espinosa

Riba

et al. 2020

IEEE Trans. Veh. Technol.

Self Cite

View full text Add to dashboard Cite

During the last years, the requirements for a fast and reliable design of electrical machines by applying optimization methods using finite element analysis (FEA), has become a subject of study. Due to their capabilities, permanent magnet synchronous machines (PMSMs) have become the preference choice for many applications, including electric vehicles (EVs) propulsion, water-pumping, robotics, or renewable power generation among others. This paper presents a novel methodology for designing and optimizing PMSMs using the torque-speed-efficiency map. The design-optimization algorithm requires as input, the torque-speed-efficiency map of the target motor, to define the required performance for the given application. The objective is to find the motor geometry which better approximates the target torque-speed-efficiency map. The PMSM is evaluated by using magneto-static FEA combined with direct-quadrature (d-q) electrical modeling, thus greatly reducing the computational burden when compared to conventional time-dependent FEA methods. The magneto-static FEA method calculates iron losses taking into account the magnetic flux density harmonic content by applying a time-space conversion approach. The design-optimization process takes into account the control strategy as well as losses separation, which is validated by using the public experimental data of the Toyota Prius and Camry PMSMs. Index Terms-Permanent magnet machines, Design optimization, Design tools, Magnetic losses, Finite element analysis NOMENCLATURE Bxy Magnetic flux density in a defined region [T] dwire Wire diameter [m] Dir Inner rotor diameter [m] Dis Inner stator diameter [m] Dor Outer rotor diameter [m] Dos Outer stator diameter [m] fobj Objective function [-] g Air gap length [m] hbrg Rotor bridge height [m] hPM Permanent magnet height [m] hrib Rotor rib height [m] hso Slot opening height [m] hsy Stator yoke height [m] ht Tooth height [m] Imax Maximum current [ARMS] L Stack lamination length [m]

show abstract

“…The purpose is the development of a smallscale stand-alone wind power system for power generation in rural and remote areas. Meanwhile, in [17] a novel methodology for the optimization of a water-pumping system or a power supply system to telecommunications equipment is presented. Likewise, Li et al [18] describe the recycling process associated with electrical machines and the retrofitting of asynchronous motors to permanent magnet generators under circular economy conditions.…”

Section: Introductionmentioning

confidence: 99%

Low-cost variable-speed wind turbines design by recycling small electrical machines. Arrangement of permanent magnets in the rotor

Ballestín-Bernad¹,

Sevil²,

Domínguez-Navarro³

et al. 2022

REPQJ

View full text Add to dashboard Cite

This paper describes the design of low-cost variablespeed wind turbines by recycling small electrical machines. In this way, electrical machines such as automobile claw-pole alternators, induction motors for domestic applications, or simply electric motors for some industrial applications are studied, considering their reuse as permanent magnet synchronous generators (PMSG) in small wind turbines or hydro-power turbines. The main purpose is the integration of hybrid energy conversion systems (wind and hydraulic turbines) in small stand-alone microgrids within the rural environment. Likewise, in order to optimize the design, the arrangement of the permanent magnets in the rotor is analyzed. The analysis has been carried out using the FluxMotor simulation software, which is based on the 2D finite element method. At the same time, the FEM software provides a lot of information about the optimization of the electrical machine and its multiple design options and topologies. Suggested designs have similar performance as well as a similar size and weight. The purpose has been to explore different topologies and select the most efficient designs. In this way, it is shown that it is possible to reuse an electrical generator easily, without losing much of the general performance.

show abstract

Water-Pumping Permanent Magnet Synchronous Motor Optimization Based on Customized Torque-Speed Operating Area and Performance Characteristics

Cited by 4 publications

References 13 publications

Customized PMSM Design and Optimization Methodology For Water Pumping Applications

Customized PMSM Design and Optimization Methodology For Water Pumping Applications

PMSM Design for Achieving a Target Torque-Speed-Efficiency Map

Low-cost variable-speed wind turbines design by recycling small electrical machines. Arrangement of permanent magnets in the rotor

Contact Info

Product

Resources

About