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2 edition of Analysis of cogging torque in permanent magnet motors. found in the catalog.

Analysis of cogging torque in permanent magnet motors.

Touzhu.* Li

Analysis of cogging torque in permanent magnet motors.

by Touzhu.* Li

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  • 27 Currently reading

Published .
Written in


The Physical Object
Pagination[63] leaves
Number of Pages63
ID Numbers
Open LibraryOL18915992M

Abstract: A method for predicting the cogging torque in radial-field permanent magnet brushless motors, based on the analytical calculation of the airgap field distribution and the net lateral force acting on the stator teeth, is developed and validated. The technique is applicable to both internal and external rotor motor topologies, modeled in a cylindrical coordinate by: The reduction of cogging torque is the most important design objective for electric power steering (EPS) motors, because the rotation characteristics of the motor are directly transmitted to a driver. Therefore, a variety of optimal design methods are applied to reduce the cogging torque for EPS motors. However, the measured cogging torques of fabricated models are significantly greater than.

Reduction of Cogging Torque in IPM Motors by Using the Taguchi and Finite Element Method: Calculation of Cogging Force in Permanent Magnet Linear Motor Using Analytical and Finite Element Methods: Torque Analysis of Permanent Magnet Hybrid Stepper Motor using Finite Element Method for Different Design Topologies: Modified Direct Torque Control. Cogging torque is an inherent characteristic of PM generators and is caused by the geometry of the generator. It is important to reduce the cogging torque in a PM generator, because cogging torque affects self-start ability and produces noise and mechanical vibration on wind turbines. Many methods have been reported to reduce cogging torque.

This paper presents a novel design method to reduce cogging torque of interior type permanent magnet (IPM) motor. In the design method, the optimal notches are put on the rotor pole face, which have an effect on variation of permanent magnet (PM) shape or residual flux density of PM. Through the space harmonics field analysis, the positions of notches are found and the optimal shapes of. Parametric analysis No Yes Yes No NoIn this article, a new and powerful PM motor design and analysis tool called “MotorAnalysis-PM” is introduced. The capabilities of the software are presented, and the design and analysis methodologies are demonstrated and applied on a 50 kW interior permanent magnet (IPM) motor utilized in a real EV [14,15].


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Analysis of cogging torque in permanent magnet motors by Touzhu.* Li Download PDF EPUB FB2

An exact analytical description of the magnetic field in idealized models of surface mounted permanent magnet motors is presented. An approximate closed form solution is derived therefrom. As to the cogging torque results obtained from measurements, finite element calculations, exact and approximate analytical modeling are compared with each by:   Y.

Yang, X. Wang, R. Zhang, T. Ding, R. Tang, The optimization of pole arc coefficient to reduce cogging torque in surface-mounted permanent magnet motors. IEEE Trans. Magn. 42(4), – () CrossRef Google ScholarAuthor: Kai Wang, Zi-Qiang Zhu. Analysis and Reduction of Cogging Torque of Line-Start Permanent Magnet Analysis of cogging torque in permanent magnet motors.

book Libing Jing*, Jun Gong, and Ying Lin Abstract—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 Size: KB.

Cogging torque and torque ripple analysis of permanent magnet flux-switching their single-stator counterparts; this characteristic is noted and justified in [19, 20] and [21], respectively.

Moreover, the investigated machine has a good fault-tolerant feature owing to the. Si et al.: The Characteristics Analysis and Cogging Torque Optimization of a Surface-Interior Permanent Magnet Synchronous Motor 43 g gg D Sl (8) Where Rsm0 is the magnetic resistance of one SPM, Rim0 is the magnetic resistance of one IPM, Rr1 is the magnetic resistance of rotor core in No.1 path, Rr2 is theFile Size: 3MB.

Request PDF | Cogging Torque Analysis of Flux-Switching Permanent Magnet Motor | A novel doubly salient permanent magnet motor named flux switch permanent magnet motor. Request PDF | Tooth-slot cogging torque and noise analysis of permanent magnet motors | Cogging torque is one of the sources which cause noise in a permanent magnet (PM) motor.

Abstract. Cogging torque exists between rotor mounted permanent magnets and stator teeth due to magnetic attraction and this is an undesired phenomenon which produces output ripple, vibration and noise in machines.

The purpose of this paper is to study the existence and effects of cogging torque, and to present a novel, rapid, half magnet pole pair technique for forecasting and evaluating cogging by: Cogging torque is a pulsating, parasitic and undesired torque ripple intrinsic of the design of a permanent magnet synchronous generator (PMSG), which should be minimized due to its adverse.

ZHU AND HOWE: INFLUENCE OF DESIGN PARAMETERS ON COGGING TORQUE IN PERMANENT MAGNET MACHINES Fig. Variation of peak cogging torque with slot number in 2-pole motor. TABLE II FACTOR C FOR TYPICAL 2-POLE BRUSHED PM MOTORS with overlapping windings all edges of magnets would face slot openings.

Fig. 5 shows the variation of the peak cogging. Cogging Torque Measurement, Moment of Inertia Determination and Sensitivity Analysis of an Axial Flux Permanent Magnet AC motor DCT Traineeship report Traineeship performed at the Charles Darwin University, Darwin, Australia Coach(es): dr.

de Boer G. Heins Supervisor: M. Steinbuch Technische Universiteit Eindhoven. We study two methods to reduce cogging torque, both based on the analysis of the rotational symmetry in a brushless permanent-magnet motor.

The first one seeks to lower the symmetry in the flux of. To examine the cause of the cogging force, the flux density distribution at the position (timing) circled in blue in fig. 1 is shown in fig. Fig.

2 shows that the flux density at the end of the mover is not evenly distributed. This imbalance of the magnetic circuit is the key factor that causes large cogging ripples.

An improved pole arc combination method to minimize the cogging torque in the interior permanent magnet brushless dc motor with flux-concentration type rotor is presented. Abstract: In order to reduce the cogging torque of the permanent magnet motor (PMM), increase the permanent magnet's air-gap magnetic density and improve the air-gap magnetic field distribution.

In this paper, segmented Halbach array magnetization is used to obtain the ideal one-sided magnetic field. The paper models the finite element analysis for machine and calculates the. 15 – Cogging Torque Analysis of an SPM Motor with a Step Skewed Magnet. As shown in fig.

2, the ratio of the frequency component at Hz, which is the fundamental frequency of the cogging torque, is 13 % when the magnet is not step skewed and 4 % when the magnet is step skewed, so the cogging torque may be reduced by applying the step.

Abstract: This paper investigates the production tolerances and variations of the lamination and permanent magnet on the cogging torque of the surface permanent magnet (SPM) machine with mass production.

The finite element analysis (FEA) and experiment contrasted analysis method is adopted to deal with the additional component cogging torque, of the 12 slots 10 poles. Interior permanent magnet synchronous motor (IPMSM) is effective to maximize torque density owing to reluctance torque as well as magnetic torque because of its salient structure of permanent magnet rotor.

However, torque distortion such as torque ripple and cogging torque would be generated with ease due to its saliency. Permanent magnet motors exhibit an effect called cogging that results in torque ripple. It is caused by magnetic reluctance forces acting mainly in the teeth of the stator, and can be minimized by good motor design, but can still be a problem in sensitive applications.

The cogging torque of a novel dual-rotor axial field flux-switching permanent magnet (DRAFFSPM) machine is investigated in this paper. The analytical equation of the DRAFFSPM machine is deduced. Based on 3D finite element method, the influences of the design parameters on the cogging torque are analyzed.

The H-shaped stator tooth with slot chamfer is proposed and the slot opening width and Cited by: 2. EVS24 Stavanger, Norway, MayCogging Torque Analysis of the PMSM for High Performance Electrical Motor Considering Magnetic Anisotropy of Electrical Steel.Abstract: Cogging torque in a permanent magnet motor, which arises from the interaction of the rotor magnets with the steel teeth on the stator, can be reduced by skewing the stator teeth, but only at the expense of added complexity in stator construction and some loss of output torque.

It is shown that by appropriate choice of the angular width of the magnet relative to the tooth-plus-slot Cited by: In many machines, where permanent magnets are used, the effects due to cogging torque generated by permanent magnets (PMs) aggravate the output characteristics of the machines.

This paper presents the method for reducing cogging torque in surface-mounted permanent magnet synchronous motor .