Browse Prior Art Database

REDUNDANT POWER SUPPLIES FOR SUBSEA APPLICATIONS

IP.com Disclosure Number: IPCOM000240474D
Publication Date: 2015-Feb-03
Document File: 3 page(s) / 87K

Publishing Venue

The IP.com Prior Art Database

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

Page 01 of 3

REDUNDANT POWER SUPPLIES FOR SUBSEA APPLICATIONS

This disclosure is related to the design of Subsea Controllers found within Subsea Electronic Modules (SEM).

As maintenance service on SEM's is extremely costly - retrieval of electronics at sea is complicated - a key characteristic for SEM's is the design for highest possible reliability.

Power Supplies at any level of an industrial installation are one of the main sources for low reliability. This can be due to electro-magnetic disturbances entering from the outside (bursts, transients, etc.) or in general components running at elevated temperatures (e.g. Power MOSFET's) over a long period of time.

Implementing redundancy at the system level is achieved by adding redundant standalone power supplies. While this mitigates the inherent low reliability of the standalone power supplies, it does nothing to improve the reliability of the SEM controller electronics.

This invention aims at alleviating the low reliability situation and consequently improve the reliability of SEM controller electronics.

STATEMENT OF PROBLEM

Power Supply redundancy is typically achieved outside of the SEM controller. Multiple power supplies converting AC to the internal DC voltage are placed in parallel. The SEM controller devices are fed power from multiple power supplies, thus achieving redundancy in case of the failure of an "external" power supply.

While this mitigates the possibility of a SEM controller external power supply failure, it does not protect from a SEM electronics internal power supply failure. Additional protection against SEM controller internal power supply failure is of interest, as the power supply circuitry on the Controller is typically the weakest link on the electronics board.

This invention describes how to solve the redundancy issue on the level of an electronics board, rather than on the plant level.

THE INVENTION

Figure 1 shows the general concept of the redundant power supply design. The SEM controller external circuitry (1) features two independent power supplies (5) and (6)...