Vertiv Corporation

John H Leitner

Michael Francis Smith

A DC-DC power converter includes an input, an output, a power circuit coupled between the input and the output to convert a voltage of a DC power received at the input to a different voltage of a DC power supplied at the output, and a control circuit. The DC-DC power converter also includes a resistor coupled in an input current path to receive an inrush current from the input, a switch coupled in parallel with the resistor to selectively bypass the resistor, and a transistor coupled to control the switch in response to a voltage across the resistor. The transistor is coupled to open the switch when the voltage across the resistor is above a specified inrush threshold to permit current flow through the resistor, and to close the switch when the voltage across the resistor is below the specified inrush threshold to bypass the resistor.

Inrush current limiter circuits and methods of limiting inrush current in a circuit

An electrical power supply includes a power circuit for providing power to a load via a conductor, and a control circuit. The control circuit is configured to set an output voltage of the power circuit at different values to cause the load voltage at the load to change, sense an output current of the power circuit corresponding to each different value of the output voltage, determine an electrical resistance of the conductor based on the different output voltage values and their corresponding output current values, and set the output voltage of the power circuit at a defined value based on the determined resistance to compensate for a voltage drop of the conductor when the power circuit provides power to the load and to regulate the load voltage at the load at a desired value. Other example power supplies, control circuits and/or methods of regulating load voltages are also disclosed.

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Lorain, OH, United States of America

John H Leitner