초록 ▼

A buck regulator or impedance converter is disclosed for operating a current limited power supply such as a photovoltaic array at or near its maximum power point. The maximum power point for such a supply is achieved at the compliance voltage which is an almost constant voltage. Means are provided f

A buck regulator or impedance converter is disclosed for operating a current limited power supply such as a photovoltaic array at or near its maximum power point. The maximum power point for such a supply is achieved at the compliance voltage which is an almost constant voltage. Means are provided for sensing the voltage at the input of the regulator and for using this sensed voltage to control a logic circuit which, in turn, controls the duty cycle of a switching transistor. The output from the switching transistor is coupled to an LC filter and from there to the load. The logic circuitry, responsive to the sensed voltage, controls the duty cycle of the switching transistor in such a manner as to maintain the input voltage approximately constant and thus to maintain the power supply at or near its peak power operating point.

대표청구항 ▼

An impedance converter for use with a current limited electrical supply which comprises: an input for coupling to said supply; an output for coupling to a load; switching means coupling said input and said output; voltage sensing means for detecting voltage at said input; circuit means responsive on

An impedance converter for use with a current limited electrical supply which comprises: an input for coupling to said supply; an output for coupling to a load; switching means coupling said input and said output; voltage sensing means for detecting voltage at said input; circuit means responsive only to said voltage sensing means for controlling said switching means and for maintaining said voltage at said input substantially constant; and filter means coupled across said output.