E3S Web Conf.
Volume 16, 201711th European Space Power Conference
|Number of page(s)||6|
|Section||Power Management & Distribution: DC/DC Converters|
|Published online||23 May 2017|
Multi-Output Power Converter, Operated from a Regulated Input Bus, for the Sireus Rate Sensor
1 Clyde Space Ltd, 5B Skypark 5, 45 Finnieston Street, G3 8JU, Glasgow, United Kingdom
2 School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, G12 8LT, United Kingdom
3 Leonardo Airborne & Space Systems (Selex ES Ltd). Crewe Toll, Edinburgh, EH5 2XS, United Kingdom
This paper describes a DC to DC converter designed to meet the power supply requirements of the SiREUS Coarse Rate Sensor (CRS) which is a 3-axis MEMS Rate Sensor (MRS) that uses a resonating ring gyro and will be used in different ESA missions. The converter supplies +5V, −5V, 3.3V, 1.8V and 40V and it has been designed and prototyped by Clyde Space Ltd with the EQM and FM units being manufactured by Selex ES. The first model was designed for a 28V un-regulated bus and the second model presented here has been designed for a 50V regulated bus. PWM voltage regulation was not used because of the noise requirements and the regulated input bus allowed an unregulated power stage approach. There are also stringent volume and interface constraints, which also affected the design. For such reasons, a fixed dutycycle, quasi-resonant single-ended topology with output linear regulators has been implemented; having the advantages of providing low switching losses, low radiated and conducted noise and no over-voltage failure mode. This paper highlights the techniques used to satisfy stringent noise and protection requirements of the load.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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