Study on 12-Sector Control Based Torque Ripple Reduction in DTC System

2012 ◽  
Vol 433-440 ◽  
pp. 233-237
Author(s):  
Hong Ge Zhao ◽  
Jing Wei Zhu ◽  
Yin Hai Fan ◽  
Xiao Chen Zhang
Keyword(s):  
Electric Propulsion ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
High Capacity ◽  
Torque Ripple ◽  
Torque Control ◽  
Ripple Reduction ◽  
Function Relationship ◽  
Torque Ripples ◽  
Zero Voltage

This paper is based on permanent magnet synchronous motor Direct Torque Control system as research background. It analyzes the zero voltage vector’s function of regulating electromagnetic torque and provides function relationship curves graph. Based on that, the strategy of 12-sector control based regional interpolation of zero voltage vector is proposed and is applied in the Marine Electric Propulsion System of high-capacity parameters as the operating environment, then is tested. The result shows that the strategy effectively reduces torque ripples as the theoretical analysis. Finally, the application of strategy of regional interpolation is systematically summarized.

Simulation Research of Direct Torque Control for Marine Permanent Magnet Synchronous Motor

2014 ◽  
Vol 1044-1045 ◽  
pp. 858-862
Author(s):  
Ke Yi Zhan ◽  
Hai Bo Gao ◽  
Fei Fei Chi
Keyword(s):  
Permanent Magnet ◽  
Electric Propulsion ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Torque Control ◽  
Permanent Magnet Synchronous Motors ◽  
Simulation Research ◽  
Stator Flux

The permanent magnet synchronous motors are more and more popular in marine electric propulsion field. Aiming to solve the problem of large torque ripple in traditional DTC system, this paper introduces the principle of space vector modulation and builds the electric propulsion system models based on direct torque control for permanent magnet synchronous motor in Simulink. Typical working condition experiments are designed to contrast the performances between traditional DTC and SVM-DTC. Simulation result proves that SVM-DTC can reduce ripples of both electromagnetic torque and stator flux effectively with the same dynamic response character as traditional DTC system.

Study of Direct Torque Control Technique on High-Capacity Motor Drives

2011 ◽  
Vol 383-390 ◽  
pp. 5958-5963
Author(s):  
Hong Ge Zhao ◽  
Jing Wei Zhu ◽  
Yin Hai Fan ◽  
Xiao Chen Zhang
Keyword(s):  
Electric Propulsion ◽  
Interpolation Method ◽  
Research Result ◽  
Direct Torque Control ◽  
High Capacity ◽  
Torque Ripple ◽  
Motor Drives ◽  
Torque Control ◽  
Control Technique ◽  
The Real

The problems existed in the traditional control strategy of Direct Torque Control (DTC) system on high-capacity motor drives and the internal causes resulted in these problems were analyzed deeply in this paper. Combining the research result of Regional Interpolation method and the real requirement of ship electric propulsion system, a brand new DTC self-adaptation control system for high-capacity motor drives is proposed and verified by the real system parameters. The system can not only satisfy the requirement of the real operation condition of ship motion control, but also show good performance in improving dynamic index and reducing electromagnetic torque ripple.

The Implementation of Permanent Magnet Synchronous Motor Direct Torque Control

2013 ◽  
Vol 712-715 ◽  
pp. 2757-2760
Author(s):  
Jun Li Zhang ◽  
Yu Ren Li ◽  
Long Fei Fu ◽  
Fan Gao
Keyword(s):  
Coordinate System ◽  
Permanent Magnet ◽  
Control Method ◽  
Block Diagram ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Torque Control ◽  
Two Phase

In order to deeply understand the characteristics of the permanent magnet synchronous motor direct torque control method, its mathematical models were established in the two-phase stationary coordinate system, the two-phase synchronous rotating coordinate system, and x-y stator synchronous rotating coordinate system. The implementation process of direct torque control method in varied stator winding connection was analyzed in detail. In order to improve the speed and torque performance of the permanent magnet synchronous motor, the direct torque control block diagram and the space voltage vector selection table were given. Finally, the summary and outlook of reducing torque ripple in the permanent magnet synchronous motor direct torque control methods.

Fuzzy logic-based direct torque control for improvement of the fault-tolerant drive of a five-phase induction motor

2021 ◽  
pp. 014233122110155
Author(s):  
Umakanta Mahanta ◽  
Bhabesh Chandra Mohanta ◽  
Anup Kumar Panda ◽  
Bibhu Prasad Panigrahi
Keyword(s):  
Fuzzy Logic ◽  
Induction Motor ◽  
Fault Tolerant ◽  
Direct Torque Control ◽  
Cost Effective ◽  
Torque Ripple ◽  
Torque Control ◽  
Open Phase ◽  
Ripple Reduction ◽  
Multi Phase

Torque ripple reduction is one of the major challenges in switching table-based direct torque control (DTC) while operating for open phase faults of an induction motor, as the switching vectors are unevenly distributed. This can be minimized by increasing the level of the inverter and with the use of multi-phase motors. Fuzzy logic-based DTC is another solution to the above problem. In this paper, a comparative analysis is done between switching table-based DTC (ST-DTC) and fuzzy logic-based DTC for increasing the performance during open phase faults of a five-phase induction motor. The result shows that in fuzzy logic-based DTC with a two-level inverter, the torque ripple is reduced by 5.164% as compared with ST-DTC with a three-level inverter. The fuzzy logic-based DTC with the three-level inverter also gives better performance as compared with fuzzy logic-based DTC with the two-level inverter. The current ripple also reduced by 9.605% with respect to ST-DTC. Thus, fuzzy logic-based DTC is more suitable and cost effective for open phase fault-tolerant drives.

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