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

Zhao, Junhan

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

Description

Title

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

Author(s)

Zhao, Junhan

Issue Date

2023-05-01

Director of Research (if dissertation) or Advisor (if thesis)

Haran, Kiruba Sivasubramaniam

Department of Study

Electrical & Computer Eng

Discipline

Electrical & Computer Engr

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Sensorless control
• IPMSM
• T-type inverter
• SVPWM

Abstract

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.

Graduation Semester

2023-05

Type of Resource

Thesis

Handle URL

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

Copyright and License Information

Copyright 2023 Junhan Zhao

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