scholarly journals Design and Modeling of a Robust Sensorless Control System for a Linear Permanent Magnet Synchronous Motor

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 966
Author(s):  
Mahmoud A. Mossa ◽  
Hamdi Echeikh ◽  
Ziad M. Ali ◽  
Mahrous Ahmed ◽  
Saad F. Al-Gahtani ◽  
...  
Keyword(s):  
Control System ◽  
Transfer Functions ◽  
Permanent Magnet Synchronous Motor ◽  
Current Control ◽  
Load Force ◽  
Variable Speed ◽  
Control Loops ◽  
Stator Resistance ◽  
Motor Model

The paper is concerned with designing an effective controller for a linear tubular homopolar (LT-H) motor type. The construction and operation of the LT-H motor are first described in detail. Then, the motor model is represented in the direct-quadrature (d-q) axes in order to facilitate the design of the control loops. The designed control system consists of two main loops: the current control loop and velocity adaptation loop. The determination of the regulator’s gains is accomplished through deriving and analyzing the transfer functions of the loops. To enhance the system’s robustness, a robust variable estimator is designed to observe the velocity and stator resistance. Different performance evaluation tests are performed using MATLAB/Simulink software to validate the controller’s robustness for variable-speed operation and load force changes as well. The obtained results reveal the appropriate dynamics of the motor thanks to the well-designed control system.

scholarly journals Sensorless Fractional Order Control of PMSM Based on Synergetic and Sliding Mode Controllers

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1494 ◽  
Author(s):  
Marcel Nicola ◽  
Claudiu-Ionel Nicola
Keyword(s):  
Control System ◽  
Fractional Order ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Speed Control ◽  
Current Control ◽  
Torque Control ◽  
Rotor Speed ◽  
Control Loops ◽  
Wide Range

The field oriented control (FOC) strategy of the permanent magnet synchronous motor (PMSM) includes all the advantages deriving from the simplicity of using PI-type controllers, but inherently the control performances are limited due to the nonlinear model of the PMSM, the need for wide-range and high-dynamics speed and load torque control, but also due to the parametric uncertainties which occur especially as a result of the variation of the combined rotor-load moment of inertia, and of the load resistance. Based on the fractional calculus for the integration and differentiation operators, this article presents a number of fractional order (FO) controllers for the PMSM rotor speed control loops, and id and iq current control loops in the FOC-type control strategy. The main contribution consists of proposing a PMSM control structure, where the controller of the outer rotor speed control loop is of FO-sliding mode control (FO-SMC) type, and the controllers for the inner control loops of id and iq currents are of FO-synergetic type. Superior performances are obtained by using the control system proposed, even in the case of parametric variations. The performances of the proposed control system are validated both by numerical simulations and experimentally, through the real-time implementation in embedded systems.

The Simulation Study of Permanent Magnet Synchronous Motor and its Hysteresis Current Control Based on AMESim

2014 ◽  
Vol 700 ◽  
pp. 678-681
Author(s):  
Yu Lan Li ◽  
Tie Zhu Zhang ◽  
Hong Zhao ◽  
Ji Zhang
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Current Control ◽  
Impedance Matrix ◽  
Hysteresis Current Control ◽  
Advantages And Disadvantages ◽  
The Mathematical Model ◽  
Motor Model

The paper gives a brief introduction of the permanent magnet synchronous motor (PMSM). The author gives the mathematical model under the simplified conditions and the PMSM rotor and stator impedance matrix. Besides, the author used AMESim to build a synchronous motor model on the basic of hysteresis current control strategy and set the parameters. A simulation was carried out and advantages and disadvantages of hysteresis current control strategy were analyzed.

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.

scholarly journals Current Regulator Design for Dual Y Shift 30 Degrees Permanent Magnet Synchronous Motor

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 777
Author(s):  
Zhihong Wu ◽  
Weisong Gu ◽  
Yuan Zhu ◽  
Ke Lu ◽  
Li Chen ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Pulse Width Modulation ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Current Control ◽  
Parameter Uncertainties ◽  
Control Loops ◽  
Decomposition Space ◽  
Harmonic Currents

This paper gives the current regulator design for a dual Y shift 30 degrees permanent magnet synchronous motor (DT_PMSM) based on the vector space decomposition (VSD). Current regulator design in α-β subspace is insufficient and designing additional controllers in x-y subspace is necessary to eliminate the harmonic currents due to the nonlinear characteristics of the inverter. A sliding mode controller based on an internal model is proposed in α-β subspace, which is robust to the parameter uncertainties and disturbances in current control loops. In order to eliminate the harmonic currents in x-y subspace, a resonant controller is employed based on a new synchronous rotating matrix. Three-phase decomposition space vector pulse width modulation (SVPWM) technique is illustrated for the purpose of synthesizing the voltage vectors in both subspaces simultaneously. The feasibility and efficiency of the suggested current regulator design are validated by a set of experimental results.

State Feedback Linearization of a Non-linear Permanent Magnet Synchronous Motor Drive

2016 ◽  
Vol 1 (3) ◽  
pp. 534 ◽  
Author(s):  
Pilla Ramana ◽  
Karlapudy Alice Mary ◽  
Munagala Surya Kalavathi
Keyword(s):  
Control System ◽  
Feedback Linearization ◽  
State Feedback ◽  
Permanent Magnet Synchronous Motor ◽  
Pi Controller ◽  
State Feedback Control ◽  
Pole Placement ◽  
Motor Speed ◽  
Control Loops ◽  
Non Linear

Control system design for inverter fed drives previously used the classical transfer function approach for single-input singleoutput (SISO) systems. Proportional plus Integral (PI) controllers were designed for individual control loops.It is found that the transient response of a PI controller is slow and is improved by pole placement through state feedback. However, the effective gains of the PI controller are substantially decreased as a function of the increase of motor speed. A control system is generally characterized by the hierarchy of the control loops, where the outer loop controls the inner loops. The inner loops are designed to execute progressively faster. The speed controller (PI controller) processes the speed error and generates the reference torque. In the inner loop, firstly a non-linear controller is designed for the system by which the system nonlinearity is canceled using state or exact feedback linearization. In addition, a linear state feedback control law based on pole placement technique including the integral of output error (IOE) is used in order to achieve zero steady state error with respect to reference current specification, while at the same time improving the dynamic response.The proposed scheme has been validated through extensive simulation using MATLAB.

Resource Efficient Architecture for Current Control Loop of Two PMSMs

2015 ◽  
Vol 741 ◽  
pp. 619-622
Author(s):  
Cho Lung Ryang ◽  
Da Ling Wang
Keyword(s):  
Permanent Magnet Synchronous Motor ◽  
Pi Controller ◽  
Current Control ◽  
Resource Consumption ◽  
Control Loop ◽  
Verilog Hdl ◽  
Control Loops ◽  
System Generator ◽  
Pi Controllers ◽  
Closed Current

This paper presents a novel closed current control loop of permanent magnet synchronous motor (PMSM). Conventional current control loops need two PI controllers per one PMSM. The paper provides a method for reduction of the resource consumption by using one PI controller for two PMSM. Combining with Black Box Blockset written by Verilog HDL based on Xilinx System Generator, one effective PI controller is designed instead of four PI controllers and simulated using Simulink. The utilization of FPGA resources is verified by Xilinx ISE 14.7 tool. The results show that the proposed method can reduce resource consumption and do not influence system performances observably.

scholarly journals Design and Simulation of the Control System for Inverter-fed Permanent Magnet Synchronous Motor Drive

2018 ◽  
Vol 12 (3) ◽  
pp. 958
Author(s):  
Ramana Pilla ◽  
Santukumari Killari ◽  
K.B.Madhu Sahu
Keyword(s):  
Control System ◽  
Permanent Magnet ◽  
Control Strategies ◽  
Permanent Magnet Synchronous Motor ◽  
Cost Effective ◽  
Synchronous Motor ◽  
Operating Conditions ◽  
Variable Speed ◽  
Linear Controller ◽  
Non Linear

<p>Development in the field of power electronics, cost effective DSP’s and microprocessors have opened a new era in the design and implement modern control strategies for variable speed drives.<strong> </strong>This paper presents the design of a control system which includes a non-linear controller and observer for inverter fed Permanent Magnet Synchronous Motor (PMSM) Drive. The entire design is carried out by designing of Speed Controller, Non-linear controller (NLC), State feedback controller (SFC), H<sub>∞</sub> controller as well as Non-linear full order observer (NFO). The proposed control scheme is extensively simulated under various conditions using MATLAB/Simulink, which shows better performance under all operating conditions for variable speed PMSM drive.</p>

Analysis on Single Photovoltaic Grid-Connected Inverter Control System

2013 ◽  
Vol 416-417 ◽  
pp. 461-467
Author(s):  
Hong Fei Liao ◽  
Qi Feng Liang
Keyword(s):  
Control System ◽  
Transfer Functions ◽  
Power Grid ◽  
Current Control ◽  
Control Mode ◽  
Current Loop ◽  
Pi Regulator ◽  
Photovoltaic Array ◽  
High Power Factor ◽  
Grid Connected Inverter

nverter can operate with power grid in parallel and can return the electricity generated by photovoltaic array with high power factor to power grid. The paper analyzes and compares several grid-connected current control methods, determines that the current control mode used in the design is improved SPWM current virtual value tracking control technology. And the paper analyzes and studies the transfer functions of key links of the inverter, and gives the derivation process of transfer functions. The control system uses dual-loop structure of inner current loop and outer voltage loop, and proposes the design methods of voltage loop and current loop PI regulator.

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