Design of PWM Inverter for Harmonics Elimination

고조파 제거를 위한 PWM 인버터의 설계

Generally, When we calculate notch angle to eliminate some selected harmonics using PWM inverter, we put the previously analysed notch angle formed by look-up table into memory, or perform the program to claculate notch angle iteratively with Fourier series. But, these methods are very difficult to control the system in real-time. Now, in this paper, we propose a new method to calculate notch angle using Walsh series, design real-time logic circuits which can be applied in 3 phase circuits and make one chip to reduce complexity and size of circuits using VLSI design technique.