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Performance Analysis of Encoderless DTC of IPMSM for Wide Operating Range

  • Research Article-Electrical Engineering
  • Published:
Arabian Journal for Science and Engineering Aims and scope Submit manuscript

Abstract

In this paper, a look-up table-based direct torque control (DTC) of interior permanent magnet synchronous motor (IPMSM) drive is reported. An approach is made to develop a sensorless four-quadrant electric drive for a wide operating speed range. In order to ensure efficient operation of IPMSM, maximum torque per ampere and field weakening algorithms are employed. The constraints associated with pure integrator in DTC are discussed, and an adaptive controller-based approach to estimating stator flux is proposed. A bidirectional DC–DC converter is implemented to allow four-quadrant operation of drive. In order to realize sensorless operation, stator current-based model reference adaptive control is employed to estimate the motor speed. Speed reversal, torque reversal, above-base-speed operation and low-speed operation of IPMSM drive are considered in this paper. The proposed algorithm is implemented in the MATLAB and Simulink, and the soundness of the suggested estimator is presented by simulation results.

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Abbreviations

\(v_{ds}^{r} ,v_{qs}^{r}\) :

dq-axis voltage in rotor reference frame

\(V_{\text{s}} ,V_{\text{s}}^{\text{max} }\) :

Stator voltage space vector and its maximum value

\(v_{\text{s}}\) :

Instantaneous value of stator voltage

\(V_{\text{DC}}\) :

DC link voltage

\(i_{qs}^{r}\) :

dq-axis current in rotor reference frame

\(I_{\text{s}} ,I_{\text{s}}^{\text{max} }\) :

Stator current space vector and its maximum value

\(i_{\text{s}}\) :

Instantaneous value of stator current

\(i_{\alpha } , i_{\beta }\) :

Alpha–beta component of stator current vector

\(\psi_{af}\) :

Permanent magnet flux linkage

\(\psi_{s} , \psi_{\alpha } , \psi_{\beta }\) :

Stator flux linkage and its alpha–beta component

\(T_{\text{e}}\) :

Electromagnetic torque

\(\omega_{\text{r}}\) :

Rotor speed

\(L_{\text{m}}\) :

Mutual inductance

\(L_{d}\) :

d-axis inductance

\(L_{q}\) :

q-axis inductances

\(R_{\text{s}}\) :

Stator resistance

P :

Number of poles

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Author information

Authors and Affiliations

  1. Department of Electrical Engineering, IIT Roorkee, Roorkee, Uttarakhand, 247667, India

    Toshi Sharma & Avik Bhattacharya

Authors
  1. Toshi Sharma
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Correspondence to Toshi Sharma.

Appendix I

Appendix I

The following motor parameters used for the simulation analysis

Parameters

Value

R s

1.4 Ω

L d

5.8 mH

L q

6.66 mH

λ af

0.1546 wb

P

6

J

0.00176 Kg m2

B

0.00038818 Nms

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Sharma, T., Bhattacharya, A. Performance Analysis of Encoderless DTC of IPMSM for Wide Operating Range. Arab J Sci Eng 45, 6501–6515 (2020). https://doi.org/10.1007/s13369-020-04550-2

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