Dynamic Hysteresis Band Fixed Frequency Current Control

2016 ◽  
Vol 6 (1) ◽  
pp. 1-4
Author(s):  
Masoud Sabaghi ◽  
Mohsen Dashtbayazi ◽  
Saeid Marjani
Keyword(s):  
Current Control ◽  
Fixed Frequency ◽  
Dynamic Hysteresis ◽  
Frequency Current

Dynamic Hysteresis Band Fixed Frequency Current Control

2016 ◽  
Vol 6 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Masoud Sabaghi ◽  
Mohsen Dashtbayazi ◽  
Saeid Marjani
Keyword(s):  
Current Control ◽  
Fixed Frequency ◽  
Dynamic Hysteresis ◽  
Frequency Current

Fixed-frequency Current Control Method of Islanding Micro-grid Based on Improved Neural Network

2020 ◽  
Vol 29 (07n08) ◽  
pp. 2040017
Author(s):  
Cuizhe Kuang ◽  
Meng Xiao ◽  
Zexing Chen ◽  
Zehuai Liu ◽  
Ziqi Wang ◽  
...  
Keyword(s):  
Neural Network ◽  
Control Strategy ◽  
Control Method ◽  
Current Control ◽  
Fixed Frequency ◽  
Large Power ◽  
Fitness Value ◽  
Variable Topology ◽  
Micro Grid ◽  
Frequency Current

In the islanding micro-grid operation mode, due to the lack of support from the large power grid, the voltage of the bus and each node in the network is completely supported by the cooperation of the micro-grid inverters in the grid. Therefore, the control performance of the micro-grid inverter determines the quality of the power supply voltage. This paper proposes an improved AC and DC islanding micro-grid fixed frequency current control method with variable topology. First, the neural network algorithm improved by particle swarm optimization is used as the basis to optimize the coordinated compensation control of the micro-grid to obtain the fitness value of the objective function under the positive and negative sequence potentials. Then, a control strategy for the improved AC/DC hybrid micro-grid is proposed, and the decoupling and coordinated control strategy for the output compensation of the dual filters in the islanding mode is designed. Finally, simulations and experiments verify the improved AC/DC hybrid microgrid with variable topology and achieve the goal of constant-frequency current control.

Performance of Pulsating High-Frequency Current Injection Based Sensorless Control of PMSM

2013 ◽  
Vol 347-350 ◽  
pp. 610-616
Author(s):  
Jian Min Wang
Keyword(s):  
High Frequency ◽  
Sensorless Control ◽  
Tracking Error ◽  
Position Estimation ◽  
Current Control ◽  
Current Injection ◽  
High Frequency Current ◽  
Position Errors ◽  
Pulsating Current ◽  
Frequency Current

In the paper the principle and performances of the pulsating current injection based sensorless control of permanent magnet synchronous motor (PMSM) are analyzed theoretically and investigated by simulations. In the analyses, the effects of the speed EMF terms and the deviation between the actual d-axis high-frequency current and the command, which results from the limited gain and bandwidth of the current control loop, are all taken into account. It is shown that the pulsating current injection method can achieve stable position estimation in a wide speed range. But appreciable position errors will result at high speeds due to the cross-coupling effects of the speed EMFs and the tracking error between the actual and command carrier current. In order to improve the performance, a modified scheme is proposed. Its validity is confirmed by simulations.

Study of a Hybrid Fixed Frequency Current Controller Suitable for DC–DC Applications

2008 ◽  
Vol 23 (3) ◽  
pp. 1437-1448 ◽  
Author(s):  
A. Lachichi ◽  
S. Pierfederici ◽  
J.-P. Martin ◽  
B. Davat
Keyword(s):  
Fixed Frequency ◽  
Current Controller ◽  
Frequency Current

scholarly journals Frequency-current system for relay vector control of non-synchronous electric drive in bridge crane travel mechanism

2015 ◽  
Vol 2015 (4) ◽  
pp. 91-99 ◽  
Author(s):  
Татьяна Сморудова ◽  
Tatyana Smorudova ◽  
Дмитрий Кочевинов ◽  
Dmitriy Kochevinov ◽  
Галина Федяева ◽  
...  
Keyword(s):  
Electric Drive ◽  
Current System ◽  
Frequency Control ◽  
Current Control ◽  
Transverse Displacement ◽  
Bridge Crane ◽  
System Parameters ◽  
High Degree ◽  
Speed And Accuracy ◽  
Frequency Current

This paper reports the variant for the advancement of the functional circuit and algorithms to control a bridge crane travels with the correction of misalignment and transverse displacement on basis of the use of new systems of a nonsynchronous electric drive with frequency control. It is offered to use a simple and reliable frequency – current with an autonomous inverter of current and a relayvector algorithm of control. A functional circuit of the system of frequen-cy-current control for the mechanism of a bridge crane travel with the correction of misalignment and transverse displacement. To analyze a crane position there are used differential values obtained by means of the indication difference in contactless sensors measuring a distance from the preset crane points to rails on the opposite supports. The procedure for the computation of control system parameters is stated. For the check of created functional circuits and algorithms of control there is used a complex electromechanical computer model of a bridge crane with a high degree of detailed elaboration (a virtual prototype of a bridge crane). The modeling results of are shown. The shown frequency – current system of control with the correction of misalignment and transverse displacement allows the decrease of threshold differential valuations and the increase of speed and accuracy of regulation

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