Surin Khomfoi

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A fault diagnostic and reconfiguration method for a cascaded H-bridge multilevel inverter drive (MLID) using artificial-intelligence-based techniques is proposed in this paper. Output phase voltages of the MLID are used as diagnostic signals to detect faults and their locations. It is difficult to diagnose an MLID system using a mathematical model because(More)
A genetic-algorithm-based selective principal component neural network method for fault diagnosis system in a multilevel inverter is proposed in this paper. Multilayer perceptron (MLP) networks are used to identify the type and location of occurring faults from inverter output voltage measurement. Principal component analysis (PCA) is utilized to reduce the(More)
A fault diagnosis system in a multilevel-inverter using a compact neural network is proposed in this paper. It is difficult to diagnose a multilevel-inverter drive (MLID) system using a mathematical model because MLID systems consist of many switching devices and their system complexity has a nonlinear factor. Therefore, a neural network classification is(More)
A hybrid cascaded multilevel inverter with PWM method is presented in this paper. It consists of a standard 3-leg inverter (one leg for each phase) and H-bridge in series with each inverter leg. It can use only a single DC power source to supply a standard 3-leg inverter along with three full H-bridges supplied by capacitors. Multilevel carrierbased PWM(More)
In this paper, a fault diagnosis system in a multilevelinverter using a neural network is developed. It is difficult to diagnose a multilevel-inverter drive (MLID) system using a mathematical model because MLID systems consist of many switching devices and their system complexity has a nonlinear factor. Therefore, a neural network classification is applied(More)
  • S. Khomfoi
  • 2008 5th International Conference on Electrical…
  • 2008
A reconfiguration technique for cascaded H-bridge multilevel inverter drives (CMID) is proposed in this paper. The reliability of the CMID can be improved by using the proposed reconfiguration technique. The proposed technique is very simple to implement because the proposed technique is based on digital logic gate; a simple AND gate and OR gate can be(More)
A 5-level cascaded hybrid multilevel inverter for interfacing with renewable energy resources is developed. The objective of this research is to propose an alternative topology of hybrid cascaded multilevel inverter applications. The modified PWM technique is also developed to reduce switching losses. Also, the proposed topology can reduce the number of(More)
This paper will present the optimization design for medium size converter with high switching frequency for household appliances. The series resonant LLC half-bridge converter, 1 kW, 48V and 600 kHz with coreless transformer has been chosen for the power transferring. System verification has been done by MATLAB/Simulink program, which used to find the(More)
This paper presents an efficient DC to DC converter for on chip circuitry which gives high-energy conversion quality using CMOS Driver-Receiver Pair for Low-Swing Signaling. The efficiency has increased due to the use of power FETs, which are able to switch at high frequency more efficiently than power bipolar transistors, which incur more switching losses(More)