Fault Identification in Modified Hybrid Digital Pulse Width Modulation using Triple Modular Redundancy

Abstract

In this paper, the fault analysis is performed for the identification in the Modified Hybrid Digital Pulse Width Modulation by making use of the Triple Modular Redundancy method. The developed algorithm is real time implemented using the Xilinx Artix 7 FPGA device. The Modified Hybrid Digital Pulse Width Modulation is designed for the purpose of minimizing the Turn-ON and Turn-OFF delays in the triggering event of the generated Digital Pulse Width Modulation. Though additional compensatory circuits are added for the delay reduction, the area utilization is still low when implemented in FPGA device. Also, the Triple Modular Redundancy consists of three times of MHDPWM signal generation to check for the fault occurrence. For the sake of validating the fault identification, the majority voter circuit is used that could find the error at the earliest. The proposed method is checked for errors by inducing within the VHDL code and trailed with multiple duty cycle values. The proposed fault identification method is validated for VLSI parameters such as area, delay and power.