Experimental investigations on flux estimation of a variable frequency IM drive

Sharma, Toshi; Ahmed, Haris; Singh, Bhoopendra; Zubair, Mohd

doi:10.1049/cp.2013.2584

Cited by 1 publication

(3 citation statements)

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“…Thus, inaccurate stator flux estimation in the lowspeed region leads to the poor performance of the IPMSM drive. Hence, a pure integrator is substituted by an LPF as given in Equation (17):…”

Section: Estimation Of Stator Fluxmentioning

confidence: 99%

“…To eradicate the problems associated with pure integrator and LPF, extensive research has been conducted [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In [7], a programmable cascaded LPF is implemented to estimate the stator flux of a vector-controlled IM drive.…”

Section: Introductionmentioning

confidence: 99%

“…Yet the large computational time and parameter dependency are accounted as drawbacks of DTDTC. A simplified LPF-based stator flux estimation is proposed in [17]. Though it incorporates only an LPF, the problem of DC drifts at very low cutoff frequency persists.…”

Section: Introductionmentioning

confidence: 99%

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Transient and steady‐state study of a speed sensorless IPMSM drive with an advanced integrator‐based stator flux estimator

Sharma

Bhattacharya

Ahmed

2021

IET Power Electronics

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In this paper, an advanced integrator is proposed for the estimation of stator flux in a direct torque control (DTC) drive. A two-level lookup table-based direct torque-controlled interior permanent magnet synchronous motor (IPMSM) drive is implemented. DTC has the inherent disadvantage of DC drift and saturation in stator flux estimation due to a pure integrator. In the proposed work, a different approach to estimate stator flux is reported overcoming the constraints of a pure integrator in DTC. An advanced integrator with an adaptive controller is implemented to determine the stator flux and enrich the performance of the drive. A comparison of transient and steady-state analysis is carried out when IPMSM is fed by a low-pass filter-based DTC and proposed stator flux estimatorbased DTC. To make the system mechanically robust, stator current-based model reference adaptive control is executed to estimate the motor speed. A mathematical derivation for the stability study of the adaptation mechanism is carried out using Popov's hyperstability criteria. The proposed algorithm is implemented in the MATLAB/Simulink environment and the soundness of the proposed work is presented by simulation results. Moreover, the experimental analysis using dSPACE1104 justifies the simulation results of the proposed system.

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Section: Estimation Of Stator Fluxmentioning

confidence: 99%