Qiang Xie, 54719 Seawood Way, San Jose, CA 95120

2012015, Jun 21, 2012

Sep 8, 2011

13/227803

Brian Hinman - Los Gatos CA, US
Qiang Xie - San Jose CA, US

GREENVOLTS, INC - FREMONT CA

H01L 31/052

136246

A hybrid solar tracking algorithm is implemented in a two-axis solar tracker mechanism for a concentrated photovoltaic (CPV) system in order to control the movement of the two-axis solar tracker mechanism. The hybrid solar tracking algorithm uses both 1) an Ephemeris calculation and 2) an offset value from a matrix to determine the angular coordinates for the CPV cells contained in the two-axis solar tracker mechanism to be moved to in order to achieve a highest power out of the CPV cells. The matrix populates with data from periodic calibration measurements of actual power being generated by the solar tracker and the tracking algorithm applies Kalman filtering to those measurements over time of the operation of the solar tracking mechanism to create the offset value being applied to the Ephemeris calculation to determine the angular coordinates for the CPV cells.

2012015, Jun 21, 2012

Sep 8, 2011

13/227662

Roeland Vandevelde - American Canyon CA, US
Qiang Xie - San Jose CA, US
Louis F. Langlois - San Francisco CA, US

GREENVOLTS, INC. - Fremont CA

G06F 15/00

702183

Angle mapping logic for a solar array of a two-axis tracker mechanism for the concentrated photovoltaic system is configured to facilitate a remotely initiated angle mapping process and then remotely diagnose movement and other pointing errors in the solar array on the two-axis solar tracker mechanism. Deviations in power produced in a set of test points of the angle mapping process and shapes of the plotted information provide diagnostics to indicate error locations and types of pointing errors present in the equipment in the solar array and in the two-axis tracker mechanism. Information from the angle mapping process is sent over a network to a remote server for analysis. The test can be initiated from the remote server.

2010005, Mar 4, 2010

Aug 28, 2008

12/200086

Qiang Xie - San Jose CA, US
Sam Cowley - Mountain View CA, US

F24J 2/38

126600, 126601

A system may include determination of whether solar tracking of a first period of time is to be performed in a first region of sky or in a second region of sky, determination of a target tracker position in a first coordinate system if the solar tracking of the first period of time is to be performed in the first region of sky, and determination of the target tracker position in a second coordinate system if the solar tracking of the first period of time is to be performed in the second region of sky. In some aspects, determination of the target tracker position in the second coordinate system includes subtracting 360 from an azimuth angle in the first coordinate system if the azimuth angle in the first coordinate system is between +180 and +360, wherein the azimuth angle in the second coordinate system is determined to be equal to the azimuth angle in the first coordinate system if the azimuth angle in the first coordinate system is between 0 and +180.