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- W12822081 abstract "Conventional 'hard switching' converters suffer from significant switching loss due to thesimultaneous imposition of high values of current and voltage on the devices during commutation.Resonant converters offer a solution to this problem. A review of resonant circuit topologies ispresented, which includes a summary of the interference problems which may occur when usingpower converters in the rail traction environment. Particular attention is given to the ResonantDC Link Inverter (RDCLI) which shows a great deal of pronuse using currently availabledevices.The frequency domain simulation of RDCLIs is discussed as a means of rapidly evaluatingcircuit behaviour, especially in relation to modulation strategies. A novel modulation strategy isproposed for Resonant DC Link Inverters, based on a procedure known as Simulated Annealingwhich allows complex harmonic manipulations such as han-nonic minimisation, to be performed.This is despite the fact that RDCLIs are constrained to use Discrete Pulse Modulation wherebyswitch commutations are restricted to specific moments in time. The modulation algorithms wereverified by use of a low-power test rig and the results obtained are compared against theoreticalvalues. Details of the hardware implementation are also included.A single-phase pulse-converter input stage is described which may be incorporated into theResonant DC Link Inverter topology. This input stage also benefits from soft-sVVItching andallows four-quadrant operation at any desired power factor. A modulation scheme based onSiMulated Annealing is proposed for the pulse-converter, to achieve hannomc control whilst alsosynchronising with the supply wavefon-n. Practical results are presented and compared with thoseobtained by simulation and calculation.Finally the design of Resonant DC Link Converters is discussed and reconunendations made forthe choice of resonant components based on the minimisation of overall losses. Comparisons aremade between hard-switching and soft-switching converters in terms of loss and harmonicperformance, in an attempt to quantify the benefits which may be obtained by the application ofsoft-switching." @default.
- W12822081 created "2016-06-24" @default.
- W12822081 creator A5086079566 @default.
- W12822081 date "1994-01-01" @default.
- W12822081 modified "2023-09-27" @default.
- W12822081 title "Resonant DC link converters and their use in rail traction applications" @default.
- W12822081 hasPublicationYear "1994" @default.
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