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Braking mode simulation of induction motor of variable-frequency drive using stator current harmonics **

https://doi.org/10.12737/18266

Abstract

The work objective is to study electrodynamic processes in the frequency-controlled drive (FCD) by the mathematical modeling method, in particular, in the two-current mode of the dynamic braking considering the 5th and 7th current harmonics of the induction motor (IM) stator. The features of forming IM stator current low frequencies (0.2-15 Hz) by the autonomous voltage inverter (AVI) followed by the additional electricity loss in the FCD, and the appearance of torque ripple on the IM shaft causing jerkiness of the actuating mechanism (AM) of the production machine (PM) executive device (ED) in the low speed zone and complicating their locating in the prearranged position, are given. It is hard to implement the FCD scheduled deceleration without trajectory correction at the friction forces ambiguity in the ED AM mobility links and availability of the torque ripple on the IM shaft. To solve this problem, the authors offer, first, to use a spatial-vector pulse-width modulation (SV PWM) with m-fold submodulation of the carrier frequency (CF) and without submodulation in the IM braking mode. Secondly, it is reasonable to apply (momentarily in a low speed area) the principle of linearization by oscillation to reduce the K friction coefficient to a decreased value in the ED AM mobility links by the IM rotor microvibration due to the 5th and 7th harmonics of the stator current. Thus, the work on modeling FCD (in Matlab + Simulink software package) allows more accurately define the impact of the 5th and 7th harmonics of the IM stator current on the capability of the software implementation of the two-current mode of the FCD dynamic braking while reducing the total energy loss in the ED AM low-speed motion area. In addition, the applicability of the proposed solutions of the electric drives of mechatronic and robotic multipurpose systems with higher requirements for positioning in the basic AM - AVI circuits is confirmed.

About the Authors

Nikolay F. Karnaukhov
Don State Technical University
Russian Federation


Maxim N. Filimonov
Don State Technical University
Russian Federation


Dmitry A. Statovoy
Don State Technical University
Russian Federation


FelixVenegas V. Bonilla
Don State Technical University
Russian Federation


References

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Review

For citations:


Karnaukhov N.F., Filimonov M.N., Statovoy D.A., Bonilla F.V. Braking mode simulation of induction motor of variable-frequency drive using stator current harmonics **. Vestnik of Don State Technical University. 2016;16(1):87-98. (In Russ.) https://doi.org/10.12737/18266

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