Sensorless control of IPMSM using a discrete-time super twisting observer by high-frequency current injection in low speed region

Xu, Z.; Gerada, Chris

Abstract

Control of interior permanent magnet synchronous motors (IPMSMs) has been extensively attempted without any position sensor. At extremely low speeds, sensorless operation would not rely on the fundamental model-based sensorless methods since the situation becomes more sophisticated. The existing high-frequency (HF) injection techniques predominantly concentrate on current or voltage excitations. Whereas, compromises are made between the signal strength and inevitably generated current fluctuations and torque ripples. Noise and disturbances could also deteriorate the performance. To accomplish the low speed sensorless operation successfully, this paper presents a position error observer and a current injection scheme for the extremely low speed sensorless operation. A discrete-time super twisting extended-state observer (STESO) extracts the estimated position and speed considering the disturbances. The design of the HF observer is carried out. The lowest speed is extended down to 2% rated value in the experimental tests.

Citation

Xu, Z., & Gerada, C. (2022). Sensorless control of IPMSM using a discrete-time super twisting observer by high-frequency current injection in low speed region. Energy Reports, 8(Suppl 15), 650-657. https://doi.org/10.1016/j.egyr.2022.10.166

• Journal Article Type: Article
• Acceptance Date: Oct 8, 2022
• Online Publication Date: Oct 25, 2022
• Publication Date: 2022-11
• Deposit Date: Jan 15, 2025
• Publicly Available Date: Jan 23, 2025
• Journal: Energy Reports
• Electronic ISSN: 2352-4847
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: Suppl 15
• Pages: 650-657
• DOI: https://doi.org/10.1016/j.egyr.2022.10.166
• Public URL: https://nottingham-repository.worktribe.com/output/42839241
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S2352484722021023?via%3Dihub
• Additional Information: Part of special issue 2022 The 5th International Conference on Renewable Energy and Environment Engineering (REEE 2022), 24–26 August, 2022, Brest, France