This book focuses on the control strategies for gearless permanent magnet synchronous motor traction elevators. Both basic principles and experimental evaluation have been addressed. This is achieved by providing in-depth study on a number of major topics such as speed detection at low-speed operation, starting torque strategy based on dichotomy and staircase methods, fuzzy self-tuning method, MPC and ADRC, etc. The comprehensive and systematic treatment of control strategies for cost-effective gearless PMSM traction elevators and practical issues are the major features of the book, which is particularly suited for readers who are interested to learn the control strategies for cost-effective gearless PMSM traction elevators. The book benefits researchers, engineers, and graduate students in the fields of ac motor drives and control strategies for cost-effective gearless PMSM traction elevators, etc.
Author(s): Guoqiang Zhang, Gaolin Wang, Nannan Zhao, Dianguo Xu
Publisher: Springer
Year: 2022
Language: English
Pages: 184
City: Singapore
Preface
Contents
1 Permanent Magnet Synchronous Motor Traction System—An Overview
1.1 Background
1.2 Geared Versus Gearless Traction Elevators
1.2.1 Energy Consumption
1.2.2 Volume
1.2.3 Use and Maintenance
1.3 Basic of PMSM Traction Machines
1.4 Applications of Low-Resolution Encoder in Elevators
1.5 Applications of Weight-Transducerless Elevators
1.6 Summary
References
2 Mathematical Model of Gearless PMSM Traction Elevators
2.1 Introduction
2.1.1 PMSM Applications
2.1.2 PMSM Classification
2.2 Mathematical Model of PMSM
2.2.1 Coordinate Transformation
2.2.2 Mathematical Model of SPMSM
2.2.3 Mathematical Model of IPMSM
2.3 Vector Control of PMSM
2.3.1 id = 0 Vector Control Mode
2.3.2 Maximum Torque Per Ampere Control
2.3.3 Flux-Weakening Control
2.4 Dynamic Model of Gearless PMSM Traction Elevators
2.5 Summary
References
3 Initial Position Detection for PMSM Traction Drives
3.1 Introduction
3.2 Basic Principle of Saliency-Tracking-Based Methods
3.2.1 HF Mathematical Model of PMSM
3.3 HF Sinusoidal Signal Injection-Based Method
3.3.1 HF Rotating Sinusoidal Signal Injection-Based Method
3.3.2 HF Pulsating Sinusoidal Signal Injection-Based Method
3.4 HF Square-Wave Signal Injection-Based Method
3.4.1 Basic Principle
3.4.2 Experimental Comparison
3.5 Initial Magnet Polarity Detection
3.5.1 Conventional Initial Magnet Polarity Detection Method
3.5.2 Proposed Continuous Initial Magnet Polarity Detection Method
3.6 Experimental Evaluation
3.7 Summary
References
4 Speed Detection Method at Low-Speed Operation
4.1 Introduction
4.2 Limitation of the Conventional Speed Calculation
4.3 Speed Detection Based on the NTD Theory
4.4 Frequency–Response Analysis and Parameter Selection
4.5 Signal Processing of the SIN/COS Encoder
4.6 Simulation and Experimental Results
4.6.1 Simulation Results
4.6.2 Experimental Results
4.7 Summary
References
5 Starting Torque Control Based on Dichotomy and Staircase Methods
5.1 Introduction
5.2 Torque Compensation Based on Dichotomy Method
5.3 Torque Compensation Based on Staircase Method
5.4 Experimental Evaluation
5.5 Summary
References
6 Fuzzy Self-tuning Torque Control Strategy
6.1 Introduction
6.2 Analysis of the Brake Releasing Process
6.3 Starting Torque Control Strategy
6.4 Design of the Fuzzy Self-tuning Torque Compensator
6.5 Experimental Evaluation
6.6 Summary
References
7 Starting Torque Control Strategy Based on Offset-Free Model Predictive Control Theory
7.1 Introduction
7.2 Dynamic Model of Elevator Traction System
7.3 Offset-Free MPC for Anti-rollback During the Elevator Startup
7.3.1 Establishment of the Offset-Free MPC for Elevator Startup
7.3.2 Cost Function Design
7.3.3 Stability Analysis of the Proposed Speed Controller
7.4 Simulation and Experimental Evaluation
7.4.1 Simulation Results
7.4.2 Experimental Results
7.5 Summary
References
8 Enhanced MPC for Rollback Mitigation During Elevator Startup
8.1 Introduction
8.2 Analysis of the Conventional MPC
8.3 Establishment of the Enhanced MPC Speed Controller
8.4 Stability Analysis and Parameter Selection of the ESO
8.5 Application of the NTD in Speed Sampling
8.6 Analysis of Parameter Selection
8.7 Experimental Evaluation
8.7.1 Experimental Setup
8.7.2 Performance of NTD
8.7.3 Performance of the Internal Current Loop Adopting PI Regulator
8.7.4 Experimental Comparison Between Conventional and Proposed Enhanced MPC
8.7.5 Control Performance Comparison of PI, Conventional MPC and Proposed Enhanced MPC
8.8 Summary
References
9 ADRC Strategy for Gearless PMSM Traction Elevators
9.1 Introduction
9.2 Establishment of ESO for Direct-Drive Elevator Traction System
9.3 Stability Analysis and Parameter Selection
9.4 NLEF Controller
9.5 Experimental Evaluation
9.5.1 Experimental Setup
9.5.2 Performance of the Inner Current Loop
9.5.3 Experimental Results of ESO with Different Gain B
9.5.4 Experimental Results of ESO Combining with NLEF
9.6 Summary
References
