Patent Application
20090151778
1. Field of the Invention
The present invention relates to solar energy photovoltaic (PV) control systems, and particularly to a solar energy PV system which can automatically adjust the angle between solar rays and a solar energy absorption board.
2. Description of Related Art
Referring to
What is desired, therefore, is to provide a solar energy photovoltaic (PV) control system which can automatically adjust the angle between incoming solar rays and a solar energy absorption board.
An embodiment of a solar energy photovoltaic (PV) control system includes a solar energy absorption board configured to receive solar energy from solar rays and transfer solar energy to voltage/current signals, a motor, a voltage/current collecting circuit connected to the solar energy absorption board to receive the voltage/current signals therefrom, a micro control unit (MCU) connected to the voltage/current collecting circuit to receive the voltage/current signals therefrom, and a motor driver connected between the MCU and the motor. The solar energy absorption board is fixed on the motor and the motor drives the solar energy absorption board to pivot. The MCU controls the motor driver to drive the motor to adjust the angle between incoming solar rays and the solar energy absorption board to place the solar energy absorption board to directly face the sun according to the collected voltage/current signals.
Other advantages and novel features of the present invention will become more apparent from the following detailed description of an embodiment when taken in conjunction with the accompanying drawings, in which:
Referring to
The solar energy absorption board 10 is configured to receive solar energy and transform the solar energy to voltage/current signals. An input of the voltage/current collecting circuit 22 is connected to the solar energy absorption board 10 to receive voltage/current signals from the solar energy absorption board 10. An input of the MCU 24 is connected to an output of the voltage/current collecting circuit 22 to receive the voltage/current signals from the voltage/current collecting circuit 22. The MCU 24 controls the motor driver 28 to drive the motor 40 to adjust the angle between incoming solar rays and the solar energy absorption board 10 to place the solar energy absorption board 10 to directly face the sun according to the collected voltage/current signals. An output of the MCU 24 outputs the adjusted voltage/current signals to the MPPT control circuit 26 after the solar energy absorption board 10 being adjusted. Then, the MPPT control circuit 26 receives the adjusted voltage/current signals and performs some predetermined MPPT control algorithms, so that the photovoltaic arrays are able to deliver maximum available power to the storage battery 300 when the solar energy absorption board 10 directly faces the sun.
In this embodiment, the MCU 24 controls the motor driver 28 to drive the motor 40 to adjust the angle between incoming solar rays and the solar energy absorption board 10 about once every thirty minutes. Each time of adjusting the solar energy absorption board 10, the MCU 24 controls the motor driver 28 to drive the motor 40 to pivot the solar energy absorption board 10 through a full range of motion (i.e. from a position where the board 10 faces the sun at the morning horizon to a position where the board faces the sun at the evening horizon) to seek a position where the solar energy absorption board 10 directly faces the sun, at which point the voltage/current signals from the voltage/current collecting circuit 22 are at a maximum level. Once the position is determined, the MCU 24 controls the motor driver 28 to drive the motor 40 to place the solar energy absorption board 10 at that position.
In this solar energy PV control system, because the solar energy absorption board 10 directly faces the sun, thereby, the solar energy PV control system has a maximal absorption efficiency for absorbing solar energy.
It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 200710203036.X | Dec 2007 | CN | national |
