Tutorial 6
T06. Motor Drive Control Technologies for Marine/Aerospace Electrical Propulsion Systems
Speaker Name: Xiong Liu
Affiliate: International Energy School, Jinan University
Title: Associate Professor
Email: liux396@jnu.edu.cn
Description of the Tutorial Proposal
- Objectives and motivation
The objective of this tutorial is to identify selected key motor drive control technologies for marine/aerospace electrical propulsion systems, including torsional vibration suppression strategies using active damping, hybrid electrical/mechanical active damping for LC-filtered motor drive with inertia-stiffness-inertia (JKJ) system, next generation advanced V/f control with field weakening, maximum torque per ampere (MTPA), and oscillation suppression functions. The motivation is to help researchers and engineers identify the selected key challenges in electrical propulsion system area and provide control solutions to address those challenges.
- Novelty, highlighting the technical innovations presented in this tutorial
This tutorial will cover several innovations as below,
(1) For motor drive with multi-rotating mass system with multiple resonance frequencies, controller design guidelines are provided to suppress the first mode torsional vibration while ensuring the other resonance modes will not be excited during step load change.
(2) For LC-filtered motor drive with mass-spring-mass system, by leveraging the current loop delay equivalence model, a unified stability criterion is established for the active damping of both the LCL and JKJ subsystems.
(3) Mechanical Load characteristics for propulsion systems are fan (aerospace) or pump (marine) types. V/f control will be re-evaluated by incorporating field weakening, maximum torque per ampere, and oscillation suppression functions. The realization methods for those functions will be unveiled to make V/f control performance similar to FOC with greatly reduced computation burden.
- Tutorial content, indicating the topics that the tutorial will cover in detail
The tutorial will cover the following key topics:
(1) Torsional vibration suppression control for inverter driven multi-rotating mass system.
(2) Hybrid Active Damping Control Algorithms for LC-Filtered Motor Drive with Two Rotating Masses.
(3) Torsional Vibration Suppression Control Based on Weighted Average Speed Feedback.
(4) Oscillation Suppression and Field Weakening Control Method for V/f Controlled Three-Phase PMSM using Reduced-order Model.
(5) Maximum Torque Per Ampere Control Method for V/f Controlled Three-Phase PMSM.
Abstract
In transportation electrification system, electromechanical interaction effect can be commonly found in marine/aerospace propulsion systems. There exist multiple resonance modes for inverter driven multi-rotating mass system. A shaft torque derivative feedback control using a nonideal generalized integrator is proposed with detailed design guidelines provided to suppress system first mode oscillation while not affecting the stability of other resonance modes. To address high dv/dt issues of VSI, one common solution is to add the LC sine filter, forming the LCL circuit with the stator winding inductance. In the LC-filtered motor drive with mass-spring-mass system, both electrical and mechanical resonances coexist. Design guidelines are provided for oscillation suppressing of both electrical and mechanical resonances within a unified framework. A weighted average speed (WAS) control strategy is proposed and validated which reduces the inverter-driven motor with two-mass system from third order control plant to first order, thereby circumventing the mechanical resonance and greatly simplifying the controller design.
Mechanical Load characteristics for propulsion systems are fan (aerospace) or pump (marine) types, which are suitable for utilizing V/f control. For the next generation advanced V/f control, a second-order modelling method of V/f control is performed and a near unity damping ratio control is achieved through small signal analysis. Under this control framework, a field weakening control method based on a modulated voltage saturator is proposed and validated. Finally, a novel MTPA control under V/f control framework is proposed and validated with greatly reduced computation burden.
Biography
Speaker 1: Dr. Xiong Liu (Senior Member, IEEE), received the B.E. degree and M.Sc. degree from Huazhong University of Science and Technology, Wuhan, China, in 2006 and 2008, respectively, and the Ph.D degree from the School of Electrical and Electronic Engineering, Nanyang Technological University (NTU), Singapore in 2013.
From September 2011 to January 2012, he was a Visiting Scholar with the Department of Energy Technology, Aalborg University, Denmark. From April 2013 to December 2013, he was a Postdoc Research Fellow with the Energy Research Institute, NTU. From December 2013 to July 2020, he worked as a Principal Technologist in Rolls-Royce Electrical, Rolls-Royce Singapore Pte. Ltd. From September 2020 till now，he is an associate professor in the Energy and Electricity Research Center at Jinan University. In his current position, he has led various research projects including one NSFC funded project, and won the sponsorship from Major Talent Program of Guangdong Province. He has published more than 60 papers including 15 first and corresponding authored tier-1 top SCI IEEE Transactions papers, 6 patents granted in US or Europe, and a few Chinese filed patent applications pending review. He has been nominated as World’s Top 2% Scientists by Stanford and Elsevier in 2024.
His current research interests include power electronics modelling and control, grid-following and grid-forming inverters, motor drive control, electrical/hybrid propulsion system for marine and aerospace applications.