Research on the Influence of Zero Space Voltage Vectors on Direct Torque Control of PMSM

2011 ◽  
Vol 383-390 ◽  
pp. 2628-2635
Author(s):  
Yu Ying Gao ◽  
Ming Ji Liu ◽  
De Ping Kong ◽  
Yun Gao Li
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Control Model ◽  
Torque Control ◽  
Switching Frequency ◽  
Switching Loss ◽  
Torque Response ◽  
Power Switches ◽  
Simulation Results

Direct torque control (DTC) has been widely used due to its advantages of less parameter dependence and faster torque response. However, in conventional DTC, there are obvious torque and flux ripples. This paper studies the influence of zero space voltage vectors on DTC system of permanent magnet synchronous motor (PMSM). The control model is established with Matlab/Simulink software. The simulation results show that the ripple torque can be reduced significantly when zero space voltage vectors are used. Meanwhile, the use of zero space voltage vectors can evidently decrease the switching frequency of the power switches as well as the switching loss. The achievements in this paper can provide a reference to improve DTC performance of PMSM.

Study on speed sensorless system of permanent magnet synchronous motor based on improved direct torque control

2021 ◽  
pp. 014233122110629
Author(s):  
Xiaoxin Hou ◽  
Mingqian Wang ◽  
Guodong You ◽  
Jinming Pan ◽  
Xiating Xu ◽  
...  
Keyword(s):  
Control System ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Torque Control ◽  
Switching Frequency ◽  
Speed Sensorless ◽  
Stator Resistance

The traditional direct torque control system of permanent magnet synchronous motor has many problems, such as large torque ripple and variable switching frequency. In order to improve the dynamic and static performance of the control system, a new torque control idea and speed sensorless control scheme are proposed in this paper. First, by deriving the equation of torque change rate, an improved torque controller is designed to replace the torque hysteresis controller of the traditional direct torque control. The improved direct torque control strategy can significantly reduce the torque ripple and keep the switching frequency constant. Then, based on the improved direct torque control and considering the sensitivity of the stator resistance to temperature change, a speed estimator based on the model reference adaptive method is designed. This method realizes the stator resistance on-line identification and further improves the control precision of the system. The performance of the traditional direct torque control and the improved direct torque control are compared by simulation and experiment under different operating conditions. The simulation and experimental results are presented to support the validity and effectiveness of the proposed method.

Modeling and Simulation of the Marine Permanent Magnet Synchronous Propulsion Motor with Direct Torque Control System

2013 ◽  
Vol 655-657 ◽  
pp. 612-619
Author(s):  
Chun Lai Zhang ◽  
Jin Nan Zhang
Keyword(s):  
Permanent Magnet ◽  
Electric Propulsion ◽  
High Efficiency ◽  
Control Method ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Switching Frequency ◽  
Electric Ship ◽  
Space Vectors

New quick-response and high efficiency direct torque control method of Permanent magnet synchronous motor is proposed. The new method is realized by optimizing the switching frequency of the inverter and choosing the most fit voltage space vectors. Modeling and simulating such marine electric propulsion system using Matlab/Simulink is performed. The starting-up and dynamic simulation results prove that this method can be fully used onboard the future all electric ship.

Research on Ripples Reduction of Flux Linkage and Torque for DTC

2012 ◽  
Vol 614-615 ◽  
pp. 1570-1573
Author(s):  
Ying Pei Liu ◽  
Ran Li ◽  
Zhi Chao Zhang
Keyword(s):  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Switching Frequency ◽  
Space Vector Modulation ◽  
Flux Linkage ◽  
Simulation Results ◽  
Vector Modulation ◽  
Torque Ripples ◽  
Fast Dynamic

In order to reduce the ripples of flux linkage and torque for direct torque control (DTC) and ensure constant inverter switching frequency, permanent magnet synchronous motor (PMSM) DTC based on space vector modulation (SVM) and extended Kalman filter (EKF) is researched in the paper. Simulation results have shown that the inherent advantages of fast dynamic response of DTC are maintained, and flux linkage and torque ripples are effectively reduced. Speed is estimated accurately, and sensorless operation is realized.

scholarly journals Direct Torque Control (DTC) SVM Predictive of a PMSM Powered by a Photovoltaic Source

2019 ◽  
Vol 01 (01) ◽  
pp. 1-7 ◽  
Author(s):  
Fadila TAHIRI ◽  
Fatiha BEKRAOUI ◽  
Ibrahim BOUSSAID ◽  
Omar OULEDALI ◽  
Abdelkader HARROUZ
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Torque Control ◽  
Switching Frequency ◽  
Direct Control

This article is part of the study of the Predictive Vector PWM-based Couple Direct Control (DTC-SVM-predictive) of a permanent magnet synchronous motor (PMSM) powered by a photovoltaic (PV) source. The Direct Torque Control (DTC-SVM-Predictive) where the control of the switching frequency is well controlled and therefore the ripples are weakened at the torque and flux levels.

scholarly journals Nonlinear Direct Torque Control of Interior Permanent Magnet Synchronous Motor Drive

2019 ◽  
Vol 38 (1) ◽  
pp. 15-26
Author(s):  
Jackson J. Justo ◽  
Francis Mwasilu
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Test Bed ◽  
Permanent Magnet Synchronous Motors ◽  
Speed Tracking ◽  
Torque Response ◽  
Interior Permanent Magnet ◽  
Speed Change

This paper presents a nonlinear direct torque control (NDTC) strategy of interior permanent magnet synchronous motors (IPMSMs) for electric vehicle (EV) propulsion. The proposed NDTC scheme applies a nonlinear model of IPMSM to dynamically determine the optimal switching states that optimize the EV drivers’ decision to reduce the workload. Moreover, the proposed NDTC method has a simple control structure and can explicitly handle system constraints and nonlinearities. The performance evaluation is conducted via a prototype IPMSM test-bed with a TMS320F28335 DSP. Comparative experimental results provide the evidence of improvements of the proposed NDTC strategy over the conventional DTC strategy by indicating a fast torque response and an accurate speed tracking even under rapid speed change conditions.

Modeling and Simulation of Direct Torque Controlled PMSM for PHEV

2010 ◽  
Vol 43 ◽  
pp. 298-302
Author(s):  
Jian Hao Zhou ◽  
Yin Nan Yuan ◽  
Deng Pan Zhang ◽  
Jia Yi Du
Keyword(s):  
Modeling And Simulation ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Flux Linkage ◽  
Voltage Space Vector ◽  
Pi Regulator ◽  
Torque Response ◽  
Starter Generator

Direct torque control (DTC) method for permanent magnet synchronous motor (PMSM) used as Integrated Starter/Generator (ISG) in PHEV was analyzed. The DTC PMSM model, with PI produced a voltage space vector based on torque PI regulator and flux linkage PI regulator, was built up based on Matlab /Simulink and all simulation blocks were discussed. The results showed that this scheme was simple and effective, also had a good robustness. It is easy to realize in PHEV application, while to keep the fast torque response and little flux linkage and torque fluctuation.

Deadbeat Direct Torque Control of Permanent Magnet Synchronous Motor Using Look-up Table

2012 ◽  
Vol 220-223 ◽  
pp. 631-634
Author(s):  
Xian Xing Liu ◽  
Na Fu
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Operating Conditions ◽  
Reference Voltage ◽  
Torque Control ◽  
Switching Frequency ◽  
Two Phase ◽  
Voltage Vector

A new scheme of deadbeat direct torque control (DTC) of surface permanent magnet synchronous motor (SPM) is proposed in this paper. The main ideal is choosing the reference voltage vector in two phase stator reference frame previously and real-time calculating the pulse width of the reference voltage vector which diminish the error of torque. With the new scheme, the torque ripples were greatly reduced when compared with those of the basic DTC and the quick dynamic torque response of the basic DTC was still retained. Fixed switching frequency at different operating conditions becomes possible by this new structure. Simulation results verify the correctness and feasibility of this method.

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