Determination of air gap permeances of hybrid stepping motors for calculation of motor behaviour

Stuebig, Cornelia; Ponick, Bernd

doi:10.1109/icelmach.2008.4800016

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…Figure 18 shows the comparison of flux density in the stator pole and stator yoke region by using the analytical method and FEA. Λ t0 and Λ t1 in Equation (11) can be accurately determined as Λ t0 = 8.1 × 10 −6 (Wb/A) and Λ t1 = 2.4 × 10 −6 (Wb/A) by 2-D FEA [18,25], and F δ = gB pm0 /µ 0 = 280 A. It can be seen that the analytical method can well predict the flux variation in the stator pole and yoke region, although some errors occur mainly due to the saturation effect.…”

Section: Fea Resultsmentioning

confidence: 99%

Presentation and Performance Evaluation of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

2017

Energies

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Abstract:In this paper, a new type of hybrid stepping motor (HSM) with permanent magnets (PMs) embedded in the stator, namely the stator-permanent-magnet hybrid stepping motor (SHSM), is presented. It has the same operation principles as the traditional HSM, with a 2-D distributed magnetic field nature and superiorities such as simpler rotor structure, easier PM cooling, higher torque and power density, and higher power grade. Its structural topology and operation principles are initially presented. Then an investigation on the performance comparison between the HSM and the SHSM, in terms of PM flux density, PM torque, detent torque, positional holding accuracy, stator core saturation issue, PM flux leakage, and PM utilization rate is carried out theoretically to make an assessment of the performance superiorities of the SHSM. A prototype of a 2-phase 8-pole 50-rotor-tooth SHSM is fabricated and experimentally compared with the HSM by using finite element analysis (FEA) to verify the motor's operational feasibility and the theoretical analysis. The FEA and experimental results show that the proposed SHSM has performance advantages such as higher torque density, higher power grade, and higher pull-out torque, holding torque, and torque-speed property, although it has performance defects such as higher torque ripple and relatively lower positional holding accuracy in the open-loop operation than the conventional HSM. Consequently, this novel SHSM is more suitable for electromechanical energy conversion applications rather than positioning mechanisms, especially taking into account the open-loop control advantage.

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Section: Fea Resultsmentioning

confidence: 99%

Presentation and Performance Evaluation of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

2017

Energies

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“…The magnetic energy dW mag and the output mechanical energy dW mech can be expressed [ 12 ]:

where G is the magnetic permeance and ϕ is the magnetic flux of each part.

where T is the torque and θ is the rotor rotation angle.…”

Section: Torque-angle Characteristicsmentioning

confidence: 99%

“…The Taguchi algorithm was proposed by Gen’chi Taguchi in the 1950s. Through local optimization, the Taguchi algorithm can establish the lowest FE model using the smallest number of tests, and use discrete data to find the best combination, which greatly reduces the time cost [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Three-Phase Hybrid Stepper Motors for Noise Reduction

Peng

Fang

et al. 2022

Sensors

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For the optimization of three-phase hybrid stepper motors with complex electromagnetic structures, an optimization method is presented in this paper. The method is a combination of 3D-FEM and the Taguchi optimization method intended to reduce the dependence on FEM results during the optimization calculation. In this paper, the optimization method is used in the optimization of the tooth shape of the three-phase hybrid stepper motor, and the objective is to reduce the noise caused by harmonics in the “torque-angle characteristic” of the motor. It is clear that traditional optimization methods make it very difficult to carry out such an optimization calculation as a large number of finite element calculations have to be used in the optimization process, and the required computation time is extremely long. Using the optimization method presented in the paper, the optimization becomes feasible because the number of finite element calculations is greatly reduced and the computation time is thus greatly reduced. In order to check the effectiveness of the optimization, the waterfall diagram for noise analysis and its application to check torque ripple are also presented in the paper. Both simulation and test results show that the optimized structure can significantly reduce the motor noise caused by torque ripple. Therefore, the optimization method proposed in this paper can be an effective tool for the optimal design of high-performance motors, including stepper motors.

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“…Although high accuracy can be achieved through the FEM, the fact that each calculation is of much timeconsuming, especially when 3-D FEM analysis has to be adopted make the method not feasible in the design stage [2] . On the contrary, the analytical-numerical method combined the other two methods in such way that the air gap region and the other regions of the stepping motor are solved by FEM and analytical approach respectively, with the corresponding advantages of time saving and high accuracy [3], [4] .…”

Section: Instructionmentioning

confidence: 99%

A new calculation method for electromagnetic torque of stepping motors —Teeth Layer Calculated Torque method

Feng

et al. 2014

2014 17th International Conference on Electrical Machines and Systems (ICEMS)

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Compared with the Tooth Layer Specific Permeability (TLSP) method being mainly adopted so far to calculate the electromagnetic torque of stepping motors, a new method is proposed in this paper, which is called the Tooth Layer Calculated Torque (TLCT) method. The concept of TLCT is defined firstly and its correctness when used to calculate the electromagnetic torque is proved theoretically at the same time. Then how to use the TLCT method in calculating the electromagnetic torque in stepping motors is described. At last, a comparative research among the TLSP method, the TLCT one and the finite element one (FEM) is performed, with the fact that, the TLCT method features simplified calculation and high accuracy compared with the former method.

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Determination of air gap permeances of hybrid stepping motors for calculation of motor behaviour

Cited by 6 publications

References 2 publications

Presentation and Performance Evaluation of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

Presentation and Performance Evaluation of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

Optimization of Three-Phase Hybrid Stepper Motors for Noise Reduction

A new calculation method for electromagnetic torque of stepping motors —Teeth Layer Calculated Torque method

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Determination of air gap permeances of hybrid stepping motors for calculation of motor behaviour

Cited by 6 publications

References 2 publications

Presentation and Performance Evaluation of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

Presentation and Performance Evaluation of a Novel Stator-Permanent-Magnet Hybrid Stepping Motor

Optimization of Three-Phase Hybrid Stepper Motors for Noise Reduction

A new calculation method for electromagnetic torque of stepping motors &#x2014;Teeth Layer Calculated Torque method

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A new calculation method for electromagnetic torque of stepping motors —Teeth Layer Calculated Torque method