Patent ID: 11916511
Assignee: NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 11:
12. A direct current (DC) power system, comprising:
a solar PV array directly connected to a DC bus for powering an inverter;
a battery connected to a controller, the controller directly connected to the DC bus;
the controller comprising:
a pair of input terminals for receiving a battery DC voltage from the battery;
a switching module for controlling a bi-directional current flow, the switching module having a pair of output terminals and a voltage sensor connected across the output terminals;
a control path for controlling the switching module, the control path comprising a current generator to generate a reference current in response to a reference voltage detected by the voltage sensor; and
a comparator connected at the output of the current generator, the comparator configured to compare the reference current with a battery current and output a signal to a controller module; the controller module configured to generate a reference value; and a pulse width modulating generator configured to receive the reference value and modulate the switch module to control controller output voltage, current flow and energy flow between the DC bus and the battery so the controller output voltage matches DC bus voltage.