Title :
A novel algorithm in solving nonlinear equations for programmed PWM inverter to eliminate harmonics
Author :
Chen, J.W. ; Liang, T.J.
Author_Institution :
Dept. of Electr. Eng., Kaohsiung Polytech. Inst., Taiwan
Abstract :
The preprogrammed PWM inverters eliminate low-order harmonies by optimizing the switching angles. In this paper a novel method for solving nonlinear equations in preprogrammed PWM Inverters is presented. The starting values for solving the nonlinear equation, are derived from the equal area algorithm. This method guarantees convergence in a numerical solution for solving nonlinear equations so that the trial-and-error processes can be significantly reduced. The numerical solutions for nonlinear equations for a full range of the fundamental amplitude can be easily obtained. Thus, this method makes fundamental amplitude modulation feasible and is helpful for online control. The output pattern of the proposed programmed PWM technique is superior to the equal area algorithm in harmonic attenuation since this technique eliminates the specified harmonics. The experimental results are used to verify the performance of the proposed scheme
Keywords :
DC-AC power convertors; PWM invertors; harmonic distortion; nonlinear equations; power system harmonics; switching circuits; equal area algorithm; fundamental amplitude modulation; harmonic attenuation; harmonics elimination; low-order harmonies; nonlinear equations solution; output pattern; performance; programmed PWM inverter; switching angles; trial-and-error processes; Amplitude modulation; Attenuation; Convergence of numerical methods; Fourier series; Modulation coding; Nonlinear equations; Numerical analysis; Pulse inverters; Pulse width modulation; Pulse width modulation inverters;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1997. IECON 97. 23rd International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-3932-0
DOI :
10.1109/IECON.1997.671819