Experimental Investigations of the Self-Controlled Synchronous Motor Connected to a Three-Phase Line Commutated SCR Inverter

2016 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Tapan Kumar Chakraborty
Keyword(s):  
Steady State ◽  
Synchronous Motor ◽  
The Self ◽  
Experimental Investigations ◽  
Phase Line ◽  
Three Phase ◽  
In Series ◽  
Terminal Voltage ◽  
Excitation Winding ◽  
Steady State Performance

<p>This paper concerns the experimental investigations of the three-phase line commutated SCR inverter fed synchronous motor.  The fabricated system consists of a line-commuted inverter, a three-phase synchronous motor with the excitation winding connected in series to the inverter input, a terminal voltage sensor and a gate-pulse generating circuit. The firing pulses for SCRs of the inverter are generated by the microprocessor in proper sequence with the help of synchronizing signal derived from the terminal voltages of the synchronous machine. The steady state performance characteristics are obtained experimentally using the fabricated system. The experimental results show that a three-phase synchronous motor supplied by a line commutated inverter with the excitation winding connected in series to the dc link provide  excellent characteristics of the conventional dc series motor.</p>

scholarly journals Model Predictive Voltage Control with Optimal Duty Cycle for Three-Phase Grid-Connected Inverter

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Shahrouz Ebrahimpanah ◽  
Qihong Chen ◽  
Liyan Zhang ◽  
Misbawu Adam
Keyword(s):  
Steady State ◽  
Duty Cycle ◽  
Tracking Error ◽  
Voltage Control ◽  
Sampling Period ◽  
Sampling Interval ◽  
Nonlinear Load ◽  
Three Phase ◽  
Switching State ◽  
Steady State Performance

This paper proposes a model predictive voltage control (MPVC) strategy with duty cycle control for grid-connected three-phase inverters with output LCL filter. The model of the system is used to predict the capacitor filter voltage according to the future output current for each possible switching state at each sampling period. Then the cost function for each prediction is determined and the switching state is selected. In the proposed method, two voltage vectors are applied during one sampling interval to achieve better steady-state performance. Finally, the optimal duration of the nonzero voltage vector is defined based on the duty cycle optimization, which is vital to the control system. The proposed strategy offers a better reference tracking error with less THD in linear and nonlinear load situations. The effectiveness of the proposed method has been verified by MATLAB/Simulink and experimental results exhibit a better steady-state performance with less sampling frequency.

A Self-Excited Synchronous Motor with Controlled Excitation

1986 ◽  
Vol 23 (2) ◽  
pp. 127-132
Author(s):  
T. F. Chan
Keyword(s):  
Steady State ◽  
Power Factor ◽  
Synchronous Motor ◽  
Experimental Results ◽  
Direct Connection ◽  
Excitation Control ◽  
Motor Power ◽  
Control Scheme ◽  
Bridge Rectifier ◽  
Steady State Performance

An excitation control scheme for a two-axis excited synchronous motor is described, which, by the direct connection of the quadrature field winding and the armature circuit through a diode bridge rectifier, enables the motor power factor to be maintained at approximately unity, irrespective of load. The steady-state performance based on a simple phasor diagram is verified by experimental results.

scholarly journals Multi-Functional Model Predictive Control with Mutual Influence Elimination for Three-Phase AC/DC Converters in Energy Conversion

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1616 ◽  
Author(s):  
Xiaolong Shi ◽  
Jianguo Zhu ◽  
Dylan Lu ◽  
Li Li
Keyword(s):  
Steady State ◽  
Model Predictive Control ◽  
Predictive Control ◽  
Mutual Influence ◽  
Dynamic State ◽  
Switching Frequency ◽  
Digital Implementation ◽  
Three Phase ◽  
One Step ◽  
Steady State Performance

Conventional model predictive control (MPC)-based direct power control of the three-phase full-bridge AC/DC converter usually suffers from the parametric coupling between active and reactive powers. A reference change of either the active or reactive power will influence the other, deteriorating the dynamic-state performance. In addition, the steady-state performance affected by one-step-delay arising from computation and communication processes in the digital implementation should be improved in consideration of switching frequency reduction. In combination with the proposed novel mutual influence elimination constraint, this paper proposes the multi-functional MPC for three-phase full-bridge AC/DC converters to improve both the steady and dynamic performances simultaneously. It has various advantages such as one-step-delay compensation, power ripple reduction, and switching frequency reduction for steady-state performance as well as mutual influence elimination for dynamic capability. The simulation and experimental results are obtained to verify the effectiveness of the proposed method.

Method for Calculating Performance of Three-Phase Line-Start Permanent-Magnet Synchronous Motor

2011 ◽  
Vol 131 (12) ◽  
pp. 1465-1475 ◽  
Author(s):  
Tsuneo Takegami ◽  
Kazuo Tsuboi ◽  
Isao Hirotsuka ◽  
Masanori Nakamura
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Phase Line ◽  
Three Phase
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