An Analytical Time–Domain Expression for the Net Ripple Produced by Parallel Interleaved Converters
We apply modular arithmetic and Fourier series to analyze the superposition of N interleaved triangular waveforms with identical amplitudes and duty-ratios. Here, interleaving refers to the condition when a collection of periodic waveforms with identical periods are each uniformly phase-shifted across one period. The main result is a time-domain expression which provides an exact representation of the summed and interleaved triangular waveforms, where the peak amplitude and parameters of the time-periodic component are all specified in closed-form. Analysis is general and can be used to study various applications in multi-converter systems. This model is unique not only in that it reveals a simple and intuitive expression for the net ripple, but its derivation via modular arithmetic and Fourier series is distinct from prior approaches. The analytical framework is experimentally validated with a system of three parallel converters under time-varying operating conditions.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- NREL Laboratory Directed Research and Development (LDRD)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1346338
- Report Number(s):
- NREL/JA-5D00-66257
- Journal Information:
- IEEE Transactions on Circuits and Systems. II, Express Briefs, Vol. 64, Issue 3; ISSN 1549-7747
- Publisher:
- IEEE
- Country of Publication:
- United States
- Language:
- English
Similar Records
A Novel Decentralized PWM Interleaving Technique for Ripple Minimization in Series-Stacked DC-DC Converters
Decentralized Interleaving of Parallel-Connected Buck Converters