# Variable frequency iteration MPPT for resonant power converters

## Abstract

A method of maximum power point tracking (MPPT) uses an MPPT algorithm to determine a switching frequency for a resonant power converter, including initializing by setting an initial boundary frequency range that is divided into initial frequency sub-ranges bounded by initial frequencies including an initial center frequency and first and second initial bounding frequencies. A first iteration includes measuring initial powers at the initial frequencies to determine a maximum power initial frequency that is used to set a first reduced frequency search range centered or bounded by the maximum power initial frequency including at least a first additional bounding frequency. A second iteration includes calculating first and second center frequencies by averaging adjacent frequent values in the first reduced frequency search range and measuring second power values at the first and second center frequencies. The switching frequency is determined from measured power values including the second power values.

- Inventors:

- Issue Date:

- Research Org.:
- University of Central Florida Research Foundation, Inc., Orlando, FL (United States)

- Sponsoring Org.:
- USDOE

- OSTI Identifier:
- 1187930

- Patent Number(s):
- 9,071,150

- Application Number:
- 14/272,110

- Assignee:
- University of Central Florida Research Foundation, Inc. (Orlando, FL)

- DOE Contract Number:
- EE0003176

- Resource Type:
- Patent

- Resource Relation:
- Patent File Date: 2014 May 07

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 14 SOLAR ENERGY; 24 POWER TRANSMISSION AND DISTRIBUTION; 97 MATHEMATICS AND COMPUTING

### Citation Formats

```
Zhang, Qian, Bataresh, Issa, and Chen, Lin.
```*Variable frequency iteration MPPT for resonant power converters*. United States: N. p., 2015.
Web.

```
Zhang, Qian, Bataresh, Issa, & Chen, Lin.
```*Variable frequency iteration MPPT for resonant power converters*. United States.

```
Zhang, Qian, Bataresh, Issa, and Chen, Lin. Tue .
"Variable frequency iteration MPPT for resonant power converters". United States. https://www.osti.gov/servlets/purl/1187930.
```

```
@article{osti_1187930,
```

title = {Variable frequency iteration MPPT for resonant power converters},

author = {Zhang, Qian and Bataresh, Issa and Chen, Lin},

abstractNote = {A method of maximum power point tracking (MPPT) uses an MPPT algorithm to determine a switching frequency for a resonant power converter, including initializing by setting an initial boundary frequency range that is divided into initial frequency sub-ranges bounded by initial frequencies including an initial center frequency and first and second initial bounding frequencies. A first iteration includes measuring initial powers at the initial frequencies to determine a maximum power initial frequency that is used to set a first reduced frequency search range centered or bounded by the maximum power initial frequency including at least a first additional bounding frequency. A second iteration includes calculating first and second center frequencies by averaging adjacent frequent values in the first reduced frequency search range and measuring second power values at the first and second center frequencies. The switching frequency is determined from measured power values including the second power values.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {2015},

month = {6}

}

Works referenced in this record:

##
Method and apparatus for controlling a DC to AC inverter system by a plurality of pulse-width modulated pulse trains

patent, April 1997

- Nakata, Hirofumi; Kodama, Hirokazu; Takebayashi, Tsukasa
- US Patent Document 5,625,539

##
Output power factor control of pulse-width modulated inverter

patent, February 2010

- Garabandic, Djordje
- US Patent Document 7,660,139