Sensorless control of an interior permanent magnet synchronous motor with a three level t-type inverter

An encoder or resolver is widely utilized for the rotor position and speed feedback in permanent magnet synchronous motor control. However, these sensors sometimes increase the system’s cost, size, and complexity. Sensorless control is an alternative strategy, which estimates the rotor position and speed through multi-physical parameters. However, sensorless control requires less harmonic distortion in the motor current and voltage, leading to a large power filter, which further increases the system’s size. Therefore, an advanced power electronics typology with less THD is also critical for high accurate sensorless control motor system. Another challenge for sensorless control is the transition between open-loop starting from zero speed and closed-loop control. An unceremonious transition will lead to motor nonalignment and generate significant vibration. The experimental prototype consists of a three-level T-type inverter and a high-power IPMSM, which demonstrated a smooth transition between the open-loop control and closed-loop sensorless control with a speed error of less than 5rpm and an accurate sensorless closed-loop control with an error of less than 1rpm, with the help of a flux linkage observer.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2023

Author dc:creator

• Zhao, Junhan

Contributors dc:contributor

• Haran, Kiruba Sivasubramaniam

• Sensorless Control
• Ipmsm
• T-type Inverter
• Svpwm

Statement dc:rights

• Copyright 2023 Junhan Zhao

Language dc:language

en, eng

Handle dc:identifier

https://hdl.handle.net/2142/120431

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F120431