Investigation of three phase two-zone thyristor AC voltage regulator with capacitor divider

2015 ◽  
Author(s):  
Aleksey V. Udovichenko ◽  
Dmitry A. Rozhdenko
Keyword(s):  
Voltage Regulator ◽  
Three Phase ◽  
Capacitor Divider

scholarly journals Application Features of Thyristor Regulators to Control the Light Flux in Industrial Fishing

2021 ◽  
Vol 320 ◽  
pp. 01015
Author(s):  
E.P. Matafonova ◽  
S.B. Burkhanov
Keyword(s):  
Power Supply ◽  
Light Flux ◽  
Synchronous Generator ◽  
Voltage Regulator ◽  
Light Sources ◽  
Stator Windings ◽  
Three Phase ◽  
Current Limiting ◽  
Wire System ◽  
Generator Stator

To control the intensity of the light flux when fishing saury it is necessary to widely change the voltage of the lighting fishing equipment. It is reasonable to carry out this by controlling additionally installed thyristor regulators supplying individual symmetric three-phase groups of light sources that will ensure balanced loading of the synchronous generator stator windings. In this research the features of using a thyristor voltage regulator in a four-wire system of ship power supply are studied based on mathematical analysis, conclusions are made using computer modeling and the use of current limiting reactors is justified.

scholarly journals Simulation of Three Phase Voltage Controlled Soft Switching Start of Induction Motor Drive

2019 ◽  
Vol 8 (3) ◽  
pp. 8104-8116
Keyword(s):  
Induction Motor ◽  
Transient Response ◽  
Fault Tolerant ◽  
Motor Drive ◽  
Voltage Regulator ◽  
Induction Motor Drive ◽  
Control Loop ◽  
Phase Voltage ◽  
Three Phase ◽  
Fault Mode

In this paper a three phase voltage regulator (thyristor based) with RL load and induction motor load is simulated for fixed firing angle first. As was seen from the results obtained that the induction motor response is highly impaired with this fixed firing angle starting. The transient response as well as the steady state response is highly oscillatory in nature. Then a suitable firing scheme was developed to vary the firing angles of each thyristor in reference to the zero crossing of the respective phase voltages. The control circuit was studied for R-L load first and then the induction motor was simulated with this firing angle control scheme. The basic objective of this work is to improve the transient response of the voltage regulator fed induction motor. One basic requirement for the induction motor to have an improved transient response is that the applied voltage to the motor must gradually increase. The same was achieved with the proposed control logic. Next the fault mode (short circuit and open circuit switch fault) analysis of the induction motor was taken up. Till now not much work has been done on this fault tolerant induction motor drive. Here a 2-phase close loop control was adopted to improve response of the induction motor in fault mode. We used both the voltage control loop as well as the current control loop to do so. Unfortunately not much can be done on this fault tolerant operation as the time was very short. Till the speed and torque pulsation during a short circuited switch fault was greatly improved by adopting this two phase control strategy.

Sign in / Sign up

Export Citation Format

Share Document