Maximum power point tracking controllers and associated systems and methods

摘要

A maximum power point tracking controller includes an input port for electrically coupling to an electric power source, an output port for electrically coupling to a load, a control switching device, and a control subsystem. The control switching device is adapted to repeatedly switch between its conductive and non-conductive states to transfer power from the input port to the output port. The control subsystem is adapted to control switching of the control switching device to regulate a voltage across the input port, based at least in part on a signal representing current flowing out of the output port, to maximize a signal representing power out of the output port.

主权项

1. A maximum power point tracking controller, comprising:
an input port for electrically coupling to an electric power source; an output port for electrically coupling to a load; a control switching device adapted to repeatedly switch between conductive and non-conductive states to transfer power from the input port to the output port; and a control subsystem adapted to control switching of the control switching device to regulate a voltage across the input port, based at least in part on a signal representing current flowing out of the output port, to maximize a signal representing power out of the output port; the control subsystem further adapted to:
control switching of the control switching device based partially on the signal representing current flowing out of the output port and a difference between the voltage across the input port and a reference voltage,vary a magnitude of the reference voltage to maximize the signal representing power out of the output port, andcontrol switching of the control switching device based partially on an error signal given by −Kv*(Vin−Vref)+Ki*Io, where Kv is a first scaling factor, Ki is a second scaling factor, Vin is the voltage across the input port, Vref is the reference voltage, and Io is the signal representing current flowing out of the output port.