| EPSRC Reference: |
GR/K41335/01 |
| Title: |
VARIABLE STEP DOWN REVERSIBLE AC/DC CONVERTOR WITH LOW DISTORTION INPUT CURRENT AND DISPLACEMENT FACTOR CONT |
| Principal Investigator: |
Green, Prof. T |
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| Department: |
Electrical and Electronic Engineering |
| Organisation: |
Imperial College London |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
30 January 1995 |
Ends: |
29 April 1997 |
Value (£): |
94,081
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Summary on Grant Application Form |
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EC directive 80/336 requires rectifiers above 600W to draw sinewave currents. Literature on switchmode rectifiers concentrates almost exclusively on step-up topologies (415 Vac to 600-1000 Vdc). This proposal concerns variable step-down (415 Vac to 0-550 Vdc) obviating main transformers or cascade converters. It develops existing step-down rectifiers through a novel topology allowing reversible power flow and providing good regulation with small energy storage components. IGBT power switches (with snubbers) will be used at high frequencies to improve response and reduce filter size. Mixed analogue/digital ASIC technology facilitates a programmable modulator based on modified space-voltage vector pwm. A dsp-based state-space controller will provide output regulation and be optimised for fast, well-damped dynamics. Feed forward of load current will be used to improve disturbance rejection. The new topology will be tested at 1-kW for both dynamic properties and electro-magnetic compatibility. A combine switching/analogue/transfer function simulator will be used to assess power switch performance and modulator/controller designs. An analytical treatment of spectral properties is envisaged. Application as a power supply for switch mode power amplifiers is proposed with regulation and disturbance rejection tests included. Use as a dc motor controller and UPS battery charger will also be investigated.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.imperial.ac.uk |