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 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.

scholarly journals Decentralized Control Method of ISOP Converter for Input Voltage Sharing and Output Current Sharing in Current Control Loop

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1114
Author(s):  
Sung-Hun Kim ◽  
Bum-Jun Kim ◽  
Jung-Min Park ◽  
Chung-Yuen Won
Keyword(s):  
Decentralized Control ◽  
Control Method ◽  
Input Voltage ◽  
Current Control ◽  
Control Loop ◽  
Output Current ◽  
Signal Model ◽  
Control Loops ◽  
Current Sharing ◽  
Small Signal Model

Input-Series-Output-Parallel (ISOP) converters, a kind of modular converter, are used in high-input voltage and high-output current applications. In ISOP converters, Input Voltage Sharing (IVS) and Output Current Sharing (OCS) should be implemented for stable operation. In order to solve this problem, this paper proposes a decentralized control method. In the proposed control, output current reference is changed according to the decentralized control characteristic in individual current control loops. In this way, the proposed control method is able to implement IVS and OCS without communication. Also, this method can be easily used in current control loops and has high reliability compared to conventional control methods that require communication. In this paper, the operation principle is described to elucidate the proposed control and a small signal model of an ISOP converter is also implemented. Based on the small signal model, IVS stability analysis is performed using pole-zero maps with varying coefficients and control gains. In addition, the current control loop is designed in a stable region. In order to demonstrate the proposed control method, a prototype ISOP converter is configured using full-bridge converters. The performance of IVS and OCS in an ISOP converter is verified by experimental result.

Design of PI Controller With Three-Loop Structure for Power Balance of Turboshaft

2014 ◽  
Author(s):  
Chao Yang ◽  
Xi Wang ◽  
Mengni Liu ◽  
Ruijun Shi ◽  
Shihuang Gao
Keyword(s):  
Control System ◽  
Inequality Constraints ◽  
Pi Controller ◽  
Pole Placement ◽  
Linear Matrix ◽  
Control Loops ◽  
Output Torque ◽  
Pi Controllers ◽  
The Stability ◽  
Regional Pole Placement

Turboshaft control systems are designed to keep the stability of helicopter, which requires that the powerturbine rotor speed remains constant. Furthermore, the power provided by each engine on the same aircraft is probably not equal if the control system provides the same fuel to each one. In this paper, a control loop aiming at balancing engine output torque and load system demand torque was added in the traditional speed-control system. Then a new structure of PI controller was developed with three control loops. Besides, the research showed this control system could be improved to keep the output torque of each engine equal to deal with the different performance degradations of different engines. Finally, the parameters of PI controllers in this control system were achieved by constructing and solving linear matrix inequality constraints based on the theory of regional pole placement for closed-loop system.

scholarly journals Optimal IP Current Controller Design Based on Small Signal Stability for THD Reduction of High-Power Density PFC Boost Converter

2020 ◽  
Author(s):  
Ahmed H. Okilly ◽  
Jeihoon Baek
Keyword(s):  
High Power ◽  
Input Voltage ◽  
Current Control ◽  
Input Current ◽  
High Power Density ◽  
Control Loop ◽  
Dc Voltage ◽  
Control Loops ◽  
Voltage Sensors ◽  
Digitally Controlled

This paper presents an optimal design for the inner current control loop of the continuous current conduction mode (CCM) power factor correction (PFC) stage, which it can be used as the front stage of the two stages alternating current-direct current (AC-DC) telecom power supply. Conventional single-phase CCM-PFC boost converter usually implemented with using of the proportional-integral (PI) controllers in both of the voltage and current control loops, to regulate the output DC voltage to the specified value, moreover to maintains the input current follows the input voltage which offers converter with high power factor (P.F) and low current total harmonic distortion (THD). However, due to the slow dynamic response of the PI controller at the zero-crossing point of the input supply current, input current can’t fully follow the input voltage which leads to high THD. Digitally controlled PFC converter with an optimal design of the inner current control loop using doubly control loops IP controller to reduce the THD and to offer input current with unity P.F was performed in this paper. Furthermore, for the economic design of the digitally control PFC converter, two isolated AC and DC voltage sensors are proposed and designed for the interfacing with the microcontroller unit (MCU). PSIM software was used to test the converter performance with using the proposed designed current controllers and isolated voltage sensors. High power density digitally controlled telecom PFC stage with P.F of about 99.93%, full load efficiency of about 98.70% and THD less 5.50% is achieved in this work.

A Static Synchronous Compensator for Displacement Power Factor Correction under Distorted Mains Voltage Conditions

1970 ◽  
Vol 110 (4) ◽  
pp. 71-76
Author(s):  
R. Cimbals ◽  
O. Krievs ◽  
L. Ribickis
Keyword(s):  
Control System ◽  
Power Factor ◽  
Pi Controller ◽  
Current Control ◽  
Control Loop ◽  
Static Synchronous Compensator ◽  
Distorted Grid ◽  
Simulation Results ◽  
Transient And Steady State ◽  
Steady State Performance

A STATCOM system is presented in this paper applied for compensation of displacement power factor under distorted mains voltage conditions. The developed STATCOM control system consists of two regulating loops - DC link voltage control loop with anti-windup PI controller and the current control loop with a feed-forward PI controller. The simulation results indicate that the developed control system performs well, ensuring displacement power factor compensation with good transient and steady state performance even under significantly distorted grid voltage conditions. Ill. 15, bibl. 8 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.110.4.291

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 A robust high-speed sliding mode control of permanent magnet synchronous motor based on simplified hysteresis current comparison

2021 ◽  
Vol 12 (1) ◽  
pp. 1
Author(s):  
Ifeanyi Chinaeke-Ogbuka ◽  
Augustine Ajibo ◽  
Kenneth Odo ◽  
Uche Ogbuefi ◽  
Muncho Mbunwe ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Permanent Magnet ◽  
High Speed ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Pi Controller ◽  
Current Control ◽  
Rotor Speed ◽  
Mode Control

A robust high-speed sliding mode control (SMC) of three phase permanent magnet synchronous motor (PMSM) is presented. The SMC served for inner speed control while a simplified hysteresis current control (HCC) scheme was used in the outer current control to generate gating signals for the inverter switches. The present research leverages on the ability of SMC to directly access system speed error which it attempts driving to zero by cancelling modelling uncertainties and disturbances. Performance comparison was done for the SMC model and an existing model having classical PI controller. With the initial positive speed command of 200 rpm at 5 Nm constant loading, rotor speed with SMC neatly settled to the reference speed at 0.085 seconds without overshoot while the rotor speed of the model with PI controller settled at 0.217 seconds after overshoot. This translates to 155.3% speed enhancement. Similar superior speed performance of the SMC was also observed during recovering from sudden speed reversal. While the SMC model recovered and settled to the reference speed of -200 rpm at 0.369 seconds, the model with PI controller settled at 0.482 seconds. From the results, it can be seen that SMC demonstared superiority over the conventioanl PI controller for complex drives systems.

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