An Improved Sensorless Control Strategy of Ship IPMSM at Full Speed Range

This paper proposed an improved sensorless control strategy for ship electric propulsion which bases on I/f control and back electromotive force integral (EMF), suppressing the speed fluctuation during algorithm switching, improving the flux estimation accuracy of internal permanent magnet synchrono...

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Bibliographic Details
Published in:IEEE access Vol. 7; pp. 178652 - 178661
Main Authors: Zhang, Zhenrui, Guo, Haohao, Liu, Yancheng, Zhang, Qiaofen, Zhu, Pengli, Iqbal, Rashid
Format: Journal Article
Language:English
Published: Piscataway IEEE 2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Acceleration
Algorithms
Back electromotive force
back EMF
Electric propulsion
Electromotive forces
Flux
I/f control
IPMSM
Permanent magnets
Rotors
Sensorless control
sensorless control algorithm
Strategy
Switches
Switching
switching strategy
Synchronous motors
Torque
ISSN:2169-3536, 2169-3536
Online Access:Get full text
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Summary:This paper proposed an improved sensorless control strategy for ship electric propulsion which bases on I/f control and back electromotive force integral (EMF), suppressing the speed fluctuation during algorithm switching, improving the flux estimation accuracy of internal permanent magnet synchronous motors (IPMSMs) and achieving the stable operation of the motor. Firstly, this strategy was adopted for controlling the stator current during the switching process to improve speed fluctuation. Then, a simple flux estimation method is presented by rewriting the mathematical model of IPMSM. To achieve the result which overcomes the problem of flux estimation and current measurement errors and improved LPF was developed which solved the phase delay and DC-offset problem of flux estimation. Finally, the propeller load platform is under construction to verify the effectiveness of the control strategy. Experimental results show that the system based on this method works smoothly and it has better speed tracking performance.
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ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2958650