Abstract

The paper presents a reliable method to generate on line pulse width modulation (PWM) signals with selected harmonic elimination (SHE) by using field programmable gate array (FPGA). These signals is used to drive voltage source inverter. Due to the complexity of solving the nonlinear equations, and impossibility to achieve the solution in real time and on line, therefore the solution is obtained off line for wide range of modulation index and as a results a huge of switching data to produce PWM patterns. These data are trained by implementing artificial neural networks (ANN). Then the ANN is hardwarely implemented by using an FPGA. The utilization of FPGA to ANN becomes very attractive since it allows fast hardware design and modification at low costs. This will enable to use SHEPWM to be applied on real time and on line. The details of the implementation on FPGA are described.

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