Simultaneous Sensorless Rotor Position and Torque Estimation for IPMSM at Standstill and Low Speed Based on High-Frequency Square Wave Voltage Injection

In this article, a method of simultaneous sensorless rotor position and torque estimation is proposed for interior permanent magnet synchronous machines at standstill and low speed. The proposed method estimates the torque using high-frequency inductances identified from the current variations due t...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2022-09, Vol.69 (9), p.8791-8802
Main Authors: Shuang, Bo, Zhu, Zi-Qiang
Format: Article
Language:English
Subjects:
Couplings
Cross coupling
Electric potential
Estimation
Hafnium
high-freq uency voltage injection
High-frequency inductance
Inductance
Low speed
Permanent magnets
Position sensing
Rotors
sensorless rotor position estimation
Square waves
Synchronous machines
Torque
torque estimation
Voltage
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Summary:In this article, a method of simultaneous sensorless rotor position and torque estimation is proposed for interior permanent magnet synchronous machines at standstill and low speed. The proposed method estimates the torque using high-frequency inductances identified from the current variations due to high-frequency square wave voltage injections in the estimated dq -axes, which are simultaneously used for sensorless rotor position estimation. The proposed method is not dependent on the fundamental model and has taken the cross-coupling effect into consideration, allowing for low cost and fast torque estimation at standstill and low speed. Both simulations and experiments are carried out to verify the effectiveness of the proposed method.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2021.3114725