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Article

Real-Time Processor-in-Loop Investigation of a Modified Non-Linear State Observer Using Sliding Modes for Speed Sensorless Induction Motor Drive in Electric Vehicles

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Department of Electrical and Electronics Engineering, Alliance College of Engineering and Design, Alliance University, Bangalore 562 106, India
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SELECT, Vellore Institute of Technology, Chennai 600127, India
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Renewable Energy Lab, College of Engineering, Prince Sultan University, Riyadh 11586, Saudi Arabia
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CORPE, Department of Energy Technology, Aalborg University, 9000 Aalborg, Denmark
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Electrical and Automotive parts Manufacturing unit, AA Industries, Chennai 600123, India
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Discipline of Engineering and Energy, Murdoch University, Murdoch 6150, Australia
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Marine Engineering Technology Department in a joint appointment with Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA
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Department of Energy Technology, Aalborg University, 6700 Esbjerg, Denmark
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Authors to whom correspondence should be addressed.
Energies 2020, 13(16), 4212; https://doi.org/10.3390/en13164212
Received: 14 July 2020 / Revised: 5 August 2020 / Accepted: 11 August 2020 / Published: 14 August 2020
(This article belongs to the Special Issue Integration of Electric Vehicles and Battery Storage Systems)
Tracking performance and stability play a major role in observer design for speed estimation purpose in motor drives used in vehicles. It is all the more prevalent at lower speed ranges. There was a need to have a tradeoff between these parameters ensuring the speed bandwidth remains as wide as possible. This work demonstrates an improved static and dynamic performance of a sliding mode state observer used for speed sensorless 3 phase induction motor drive employed in electric vehicles (EVs). The estimated torque is treated as a model disturbance and integrated into the state observer while the error is constrained in the sliding hyperplane. Two state observers with different disturbance handling mechanisms have been designed. Depending on, how they reject disturbances, based on their structure, their performance is studied and analyzed with respect to speed bandwidth, tracking and disturbance handling capability. The proposed observer with superior disturbance handling capabilities is able to provide a wider speed range, which is a main issue in EV. Here, a new dimension of model based design strategy is employed namely the Processor-in-Loop. The concept is validated in a real-time model based design test bench powered by RT-lab. The plant and the controller are built in a Simulink environment and made compatible with real-time blocksets and the system is executed in real-time targets OP4500/OP5600 (Opal-RT). Additionally, the Processor-in-Loop hardware verification is performed by using two adapters, which are used to loop-back analog and digital input and outputs. It is done to include a real-world signal routing between the plant and the controller thereby, ensuring a real-time interaction between the plant and the controller. Results validated portray better disturbance handling, steady state and a dynamic tracking profile, higher speed bandwidth and lesser torque pulsations compared to the conventional observer. View Full-Text
Keywords: machine model; adaptive control; model reference; disturbance; stability; real-time; processor-in-loop (PIL); electric vehicles machine model; adaptive control; model reference; disturbance; stability; real-time; processor-in-loop (PIL); electric vehicles
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MDPI and ACS Style

Krishna Srinivasan, M.; Daya John Lionel, F.; Subramaniam, U.; Blaabjerg, F.; Madurai Elavarasan, R.; Shafiullah, G.M.; Khan, I.; Padmanaban, S. Real-Time Processor-in-Loop Investigation of a Modified Non-Linear State Observer Using Sliding Modes for Speed Sensorless Induction Motor Drive in Electric Vehicles. Energies 2020, 13, 4212. https://doi.org/10.3390/en13164212

AMA Style

Krishna Srinivasan M, Daya John Lionel F, Subramaniam U, Blaabjerg F, Madurai Elavarasan R, Shafiullah GM, Khan I, Padmanaban S. Real-Time Processor-in-Loop Investigation of a Modified Non-Linear State Observer Using Sliding Modes for Speed Sensorless Induction Motor Drive in Electric Vehicles. Energies. 2020; 13(16):4212. https://doi.org/10.3390/en13164212

Chicago/Turabian Style

Krishna Srinivasan, Mohan, Febin Daya John Lionel, Umashankar Subramaniam, Frede Blaabjerg, Rajvikram Madurai Elavarasan, G. M. Shafiullah, Irfan Khan, and Sanjeevikumar Padmanaban. 2020. "Real-Time Processor-in-Loop Investigation of a Modified Non-Linear State Observer Using Sliding Modes for Speed Sensorless Induction Motor Drive in Electric Vehicles" Energies 13, no. 16: 4212. https://doi.org/10.3390/en13164212

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