scholarly journals A Precise Current Detection Method Using a Single Shunt and FET Rds(on) of a Low-Voltage Three-Phase Inverter

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 9
Author(s):  
Jae-Yeob Hwang ◽  
Ji-Hwan Park ◽  
Ji-Ho Choi ◽  
Jun-Ik Uhm ◽  
Geun-Ho Lee ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Detection Method ◽  
Low Voltage ◽  
Harmonic Distortion ◽  
Torque Ripple ◽  
Current Sensor ◽  
Phase Inverter ◽  
Three Phase ◽  
Current Detection ◽  
Three Phase Inverter

In this study, a low-voltage three-phase inverter was used alongside a shunt resistor to measure the current. However, it is known that this type of inverter and shunt resistor system has a region where the measurement of current is impossible due to structural limitations. As a result, many studies have focused on this region through the use of additional algorithms. Most studies measured current by forcibly adjusting the PWM duty in order to measure the current at the region where it could not be sensed. However, unfortunately, the total harmonic distortion (THD) increases in the current due to PWM adjustment. This causes an increase in torque ripple and inverter control instability. Therefore, in this paper, current was measured using the Rds(on) value between the drain source resistor when MOSFET was turned on and the Kalman filter in a low-voltage three-phase inverter with a single shunt. Additionally, the value was verified via comparison with the values achieved when a Hall-type current sensor and single shunt were used. As a result, this study confirmed that the inverter with a single shunt performs the same as a Hall-type sensor at the region where current cannot be detected.

scholarly journals Low voltage grid connected three-phase inverter control with hybrid neuro-fuzzy 

2021 ◽  
Vol 2 (1b) ◽  
pp. C20A07-1-C20A07-6
Author(s):  
Ndiaye El hadji Mbaye ◽  
◽  
Ndiaye Alphousseyni ◽  
Faye Mactar ◽  
Keyword(s):  
Fuzzy Inference ◽  
Low Voltage ◽  
Harmonic Distortion ◽  
Voltage Regulation ◽  
Inference System ◽  
Phase Inverter ◽  
Proportional Integral ◽  
Neuro Fuzzy ◽  
Three Phase ◽  
Three Phase Inverter

In this paper, an Adaptive Neuro Fuzzy Inference System (ANFIS) and Modified Proportional Integral Derivate (MPID) are used for respectively DC-link voltage regulation and grid currents regulation for grid connected three-phase inverter. The main purpose of this work is to reduce the fluctuation on DC-link voltage and the Total Harmonic Distortion (THD) on the injected currents. Indeed, the use of Proportional-Integral (PI) controller cannot achieve these objectives due to their disturbances sensitivity problem and limited regulation bandwidth. To avoid these problems, an ANFIS regulator has been designed. Results show that ANFIS has a very short response time (Rt) 0.097 s with no overshoot (D).

scholarly journals Torque Ripple Suppression Method for BLDCM Drive Based on Four-Switch Three-Phase Inverter

2015 ◽  
Vol 15 (4) ◽  
pp. 974-986 ◽  
Author(s):  
Lei Pan ◽  
Hexu Sun ◽  
Beibei Wang ◽  
Gang Su ◽  
Xiuli Wang ◽  
...  
Keyword(s):  
Torque Ripple ◽  
Phase Inverter ◽  
Three Phase ◽  
Suppression Method ◽  
Three Phase Inverter

scholarly journals H7 three phase transformerless inverter for photovoltaic grid-tied system with maximum power point operation

2021 ◽  
Vol 12 (3) ◽  
pp. 1853
Author(s):  
Essam Hendawi ◽  
Sherif Zaid
Keyword(s):  
Power Systems ◽  
Leakage Current ◽  
High Efficiency ◽  
Low Cost ◽  
Harmonic Distortion ◽  
Boost Converter ◽  
Phase Inverter ◽  
The Earth ◽  
Three Phase ◽  
Three Phase Inverter

<span lang="EN-US">One of the most important and common parts of the modern power systems is the grid-connected photovoltaic (PV) systems. Recently, these systems have gotten a big revolution due to the introduction of the transformerless inverters. It has the merits of small size, low cost, and high efficiency. However, transformerless inverters has a general safety problem related to the earth leakage current. Various researches were directed toward evolving their performance and diminishing the leakage current to the standard limits. This article proposes an application of the H7 controller to a PV powered grid-tied three phase transformerless inverter. The transformerless inverter is linked with the grid through a boost converter. The boost converter inductance is rearranged and divided to reduce the earth leakage current of the system. simulations are carried out for the proposed H7 PV grid-tied system and for a system that uses the conventional three phase inverter. The simulation results show that the H7 inverter provides lower leakage current, higher efficiency, and lower total harmonic distortion (THD) compared to the conventional three phase inverter.</span>

Sign in / Sign up

Export Citation Format

Share Document