F-MRAS Based Speed Sensorless Vector Controlled Switched Reluctance Motor Drive

IET Electric Power Applications

2020

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This study deals with the unipolar excitation‐based speed sensorless vector controlled switched reluctance motor drive. For speed sensorless operation, Z‐MRAS (Z‐model reference adaptive system) based speed estimator is proposed where ‘Z’ is a fictitious quantity. This novel structure is completely independent of the stator resistance and DC component of self‐inductance. Also, in the formulation, integrator and differentiator terms are absent. The proposed formulation is perceived as stable in the entire four‐quadrant zone of operation. Detailed stability and sensitivity analysis has been carried out for the proposed estimation scheme. The practicality of the proposed formulation is confirmed through simulation in MATLAB/SIMULINK platform and by carrying out the experimentation on a dSPACE‐1104 based prototype.

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Section: Vector‐control Strategy With Unipolar Excitationmentioning

confidence: 99%

“…Also,

θ_{e} = P θ_{r}

, where ‘ θ r ’ is the mechanical angle and ‘ θ e ’ is the electrical angle. The principle of torque generation with unipolar excitation is explained in [30, 31].…”

Section: Vector‐control Strategy With Unipolar Excitationmentioning

confidence: 99%

Improved MRAS based speed estimation for a vector controlled switched reluctance motor drive

IET Electric Power Applications

2020

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“…The reason for this shift towards SRM drives from the conventional drives is because of its several merits over other machine drives. The SRM possesses no windings on the rotor thus making possible very high-speed operation [1][2][3][4]. The other advantages it possess are the high torque by weight ratio, low cost because of the simple construction and reduction in the cost of associated switching devices, use of concentric windings, negligible rotor losses etc.…”

Section: Introductionmentioning

confidence: 99%

“…The other advantages it possess are the high torque by weight ratio, low cost because of the simple construction and reduction in the cost of associated switching devices, use of concentric windings, negligible rotor losses etc. [2,3,5]. In order to recognise the full potential of SR-motor, it is necessary to overcome some of the disadvantages associated with it.…”

Section: Introductionmentioning

confidence: 99%

“…No external circuitry is required for injecting the pulses into the non-active phases for position/speed estimation [1,3,4]. The estimator is free from integrator terms in contrast to F-MRAS-based speed estimator, which involves integrator terms in speed estimation process [29]. This estimator is prominently dependent on two machine parameters i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel speed estimation technique for vector‐controlled switched reluctance motor drive

IET Electric Power Applications

2019

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This article discusses the speed-sensorless vector-controlled SRM-drive. The use of position/speed sensors have few concerns related to it in terms of cost, reliability, and compactness, a few to mention. Therefore, it is necessary to have some estimation strategy which estimates the speed/position. Since the control of the machine is done in dq0-reference frame, so by utilising these dq0-variables a novel speed/position estimation technique i.e. 'P n-MRAS (Net-input-Power-based Model-Reference-Adaptive-System) speed-estimator' is developed for the vector-controlled SRM-drive. The speed-estimator implemented is simple, no look-up table is required and no external circuitry is required for injection of the diagnostic signal. Also, the estimator is free from differentiator and integrator terms. The proposed speed-estimator is stable in all the four quadrants of operation which is proved by performing the stability analysis. The estimator is dependent on two machine parameters (stator-resistance and amplitude of AC-component of self-inductance). The estimator is made robust to changes in stator-resistance by estimating the resistance online by proposed V 0-MRAS resistance-estimator. The drive has been extensively simulated in MATLAB/SIMULINK and results are also verified experimentally through a dSPACE-1104-based laboratory prototype.

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Implementation of a new speed estimation technique for vector controlled switched reluctance machines

2022

Measurement