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Title: Digitally Controlled High Availability Power Supply

This paper reports the design and test results on novel topology, high-efficiency, and low operating temperature, 1,320-watt power modules for high availability power supplies. The modules permit parallel operation for N+1 redundancy with hot swap capability. An embedded DSP provides intelligent start-up and shutdown, output regulation, general control and fault detection. PWM modules in the DSP drive the FET switches at 20 to 100 kHz. The DSP also ensures current sharing between modules, synchronized switching, and soft start up for hot swapping. The module voltage and current have dedicated ADCs (>200 kS/sec) to provide pulse-by-pulse output control. A Dual CAN bus interface provides for low cost redundant control paths. Over-rated module components provide high reliability and high efficiency at full load. Low on-resistance FETs replace conventional diodes in the buck regulator. Saturable inductors limit the FET reverse diode current during switching. The modules operate in a two-quadrant mode, allowing bipolar output from complimentary module groups. Controllable, low resistance FETs at the input and output provide fault isolation and allow module hot swapping.
Authors:
;
Publication Date:
OSTI Identifier:
938630
Report Number(s):
SLAC-PUB-13415
TRN: US0806034
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Presented atLinac 2008, , 9/28/2008-10/2/2008
Research Org:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; AVAILABILITY; DESIGN; DETECTION; EFFICIENCY; LINEAR ACCELERATORS; POWER SUPPLIES; REDUNDANCY; RELIABILITY; SHUTDOWN; SOLENOIDS; START-UP; SWITCHES; TOPOLOGY; Accelerators,ACCSYS