Patent ID: 9640990
Date: 2017-05-02
CPC Classifications: G05F,G06F,H01R,H02J,H02M

Claim:
1. A power supply module for a distribution automation system, the power supply module being connectable in parallel and comprising: a means to connect an input power source to the power supply module and to connect output of the power supply module to external devices; a regulating means comprising a switching element which is controlled by a voltage error amplifier to regulate an output DC voltage; a rectification module generating the output DC voltage; a transformer having a primary side connected with the regulating means and one or more power input power sources, and a secondary side connected to the rectification module, wherein the switching element is adapted to control current on the primary side of the transformer; a voltage feedback means for providing a voltage feedback signal to the regulating means to regulate the output DC voltage; a load share control module having a load share signal for controlling load sharing for the power supply module; and a filter amplifier for conditioning the voltage feedback signal in a voltage control loop, the filter amplifier being connected on the secondary side of the transformer for reducing noise in the power supply module; wherein the filter amplifier on the secondary side of the transformer and the voltage error amplifier of the regulating means on the primary side of the transformer each have a different frequency response to achieve stability over a wide input voltage range and different input power sources for parallel connected power supply.