Investigation of Flux-Linkage Profile Measurement Methods for Switched-Reluctance Motors and Permanent-Magnet Motors

Lu, Kaiyuan; Rasmussen, Peter Omand; Ritchie, Andrew Ewen

doi:10.1109/tim.2009.2017154

Cited by 47 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, this technique is suitable only for SRM having monolithic rotor structure. Magnetic flux is estimated using an AC source as reported in [22]. The accuracy of the measured values is crucially affected by source harmonics and high iron losses.…”

Section: Introductionmentioning

confidence: 99%

A simple approach for the computation of magnetic characteristics of 4-phase switched reluctance motor

Hadapad,

Naik

2024

IJPEDS

View full text Add to dashboard Cite

Switched reluctance motor (SRM) is non-linear in nature due to non-uniform air gap between stator and rotor that is produced from doubly salient poles. To control the operation of non-linear motor, a precise modelling of magnetic characteristic is essential. Traditionally magnetic equivalent circuit, finite element method (FEM) and experimental approaches have been used to derive magnetic characteristics of SRM. These methods involve complex computational steps and numerous assumptions for its calculations. To avoid this complexity, a simple approach is suggested in this paper to compute magnetic characteristics of 4-phase SRM. In this approach, SRM phase inductance is measured directly to identify the location of rotor with respect to stator from unaligned to aligned position. Then, single phase of SRM is excited through asymmetric converter and voltage and currents of corresponding phase is recorded with rotor being blocked using indexing head. Later recorded values are used to compute the magnetic characteristics from unaligned to aligned position. The proposed method is carried out using field programmable gate array (FPGA) controlled 8/6, 4-phase SRM. Further, accuracy of obtained magnetic characteristic is verified using FEM. In addition, fidelity of the magnetic characteristic is also validated by developing a dynamic model of SRM in MATLAB/Simulink

show abstract

Section: Introductionmentioning

confidence: 99%

A simple approach for the computation of magnetic characteristics of 4-phase switched reluctance motor

Hadapad,

Naik

2024

IJPEDS

View full text Add to dashboard Cite

show abstract

“…A measurement offset problem associated with the static torque measurement method is the difficulty to achieve perfect alignment between torque transducer and the motor shaft due to the presence of frictional torque [28]. The offset error could be severe in the measurement of small torque.…”

Section: Introductionmentioning

confidence: 99%

A Standstill Method to Measure Electromagnetically Induced Torque Ripple of Permanent Magnet Synchronous Machines

Pouramin

Dutta

Farshadnia

et al. 2020

IEEE Trans. Instrum. Meas.

View full text Add to dashboard Cite

The accurate measurement of the electromagnetically induced torque ripple of the permanent magnet synchronous machines (PMSMs) is essential to experimentally validate the effects of various minimization techniques applied during design optimisation. The conventional torque ripple measurement methods often fail to isolate the electromagnetically induced ripple of the test machine. The components of a conventional test set-up such as the inverter and controller, load machine, bearings, coupling systems, and mechanical resonances, all have potential to contribute to the overall ripples measured using existing test procedures. Outmost care must be taken to isolate the test machine induced torque ripple from the other components. This paper proposes a simple, standstill test method to measure the ripple of the air gap torque of a PMSM with high accuracy. In the proposed method, at incremental rotor positions, the rotor is blocked, and the stator windings are supplied with the current that correspond to an operating condition at which the torque ripples need to be measured. Due to the standstill nature of the proposed method, many uncertainties related to the rotation are eliminated. A theoretical analysis was carried out to show that the induced ripples of the air gap torque of a PMSMs is independent of speed and supply frequency and hence, measurement of these ripple in a standstill is possible. The proposed method was experimentally validated using two PMSMs with different torque profiles. The validation of the results demonstrates an excellent agreement between the measured torque ripple and those obtained from the FEA calculation.

show abstract

“…The Finite Element (FE) method can be used to compute the inductances at various rotor positions of the SRM (Santos et al, 2010); but this necessitates a package and more time for modeling the motor. In this and, the calculation of the phase inductances and flux-linkages (Lu et al, 2009). of a submersible SRM for all the rotor positions and stator excitations using a MATLAB program are presented.…”

Section: Introductionmentioning

confidence: 99%

Determination of Flux linkage Characteristics and Inductance of a Submersible Switched Reluctance Motor using Software Tools

Maruthachalam¹

2011

Journal of Computer Science

View full text Add to dashboard Cite

Problem statement:The Switched Reluctance Motor (SRM) is an old member of the Electric Machines Family. It's simple structure, ruggedness and inexpensive manufacturing capability make it more attractive for Industrial applications. Now, the applications of switched reluctance motors in various industrial fields are tried by many engineers. However, switched reluctance motors are not used so far in submersible underwater motor for agriculture purposee. The torque developed by an SRM is dependent on the change of flux-linkage and rotor position. The flux linkage characteristic of the motor is required to make the control circuit. Since the SRM is non-linear in nature, estimation and calculation of the flux linkage characteristics is very difficult. Approach: With the flux tube method concept a simple algorithm is being developed in a MATLAB. ANSYS Software is used to determine the flux distribution at various rotor positions. Results: The aligned and unaligned flux linkage values for theoretical calculation at a current of 7 A is 72.7 mwb and 13.79 mwb respectively. With FEA simulation the obtained value is 92.73 mwb and 19.175. Conclusion: In this and, a simplified method for the determination of flux linkage characteristics of submersible SRM using MATLAB has been presented. The obtained value has been validated with the ANSYS FEM method. the calculated unaligned and aligned inductance values of a 4-phase, 3 hp, 220 V Submersible SRM using simplified MATLAB method very much matches with the ANSYS FEM Method.

show abstract

Investigation of Flux-Linkage Profile Measurement Methods for Switched-Reluctance Motors and Permanent-Magnet Motors

Cited by 47 publications

References 14 publications

A simple approach for the computation of magnetic characteristics of 4-phase switched reluctance motor

A simple approach for the computation of magnetic characteristics of 4-phase switched reluctance motor

A Standstill Method to Measure Electromagnetically Induced Torque Ripple of Permanent Magnet Synchronous Machines

Determination of Flux linkage Characteristics and Inductance of a Submersible Switched Reluctance Motor using Software Tools

Contact Info

Product

Resources

About