Journal ArticleDOI
DC link current in PWM inverters
P.D. Evans,R.J. Hill-Cottingham +1 more
- Vol. 133, Iss: 4, pp 217-224
TLDR
Variation of the DC link current harmonics with power factor of the load and depth of modulation under these conditions is presented and discussed.Abstract:
A general method is described for calculating the current drawn by an inverter from its DC source. It has special relevance to pulse-width modulated inverters and allows the ripple current rating of the filter capacitor to be specified with some precision. The method is for an inverter of any number of phases and uses switching functions derived from the harmonic coefficients of the inverter waveform. Experimental results from single- and 3-phase inverters demonstrate the validity of the method. Some generalised results are presented for a 3-phase inverter for the special case where the output current can be assumed to be the fundamental component only. Variation of the DC link current harmonics with power factor of the load and depth of modulation under these conditions is presented and discussed.read more
Citations
More filters
Journal ArticleDOI
Analytical calculation of the RMS current stress on the DC-link capacitor of voltage-PWM converter systems
Johann W. Kolar,S.D. Round +1 more
TL;DR: In this paper, a simple analytical expression for the current stress on the DC-link capacitor caused by the load-side inverter of a voltage D-link-converter system is derived.
Journal ArticleDOI
Reliability assessment of photovoltaic power systems: Review of current status and future perspectives
TL;DR: In this article, the state-of-the-art technologies for evaluating the reliability of large-scale photovoltaic (PV) power system and the effect of PV interconnection on local distribution system are reviewed.
Journal ArticleDOI
Derivation of motor line-current waveforms from the DC-link current of an inverter
TL;DR: In this article, a technique for reconstructing squirrel cage motor line currents using information from a single current transducer in the DC-link of an inverter is presented, with a bandwidth limited to half the inverter switching frequency.
Journal ArticleDOI
Auto-Calibrating DC Link Current Sensing Technique for Transformerless, Grid Connected, H-Bridge Inverter Systems
TL;DR: In this paper, the authors proposed an auto-calibrating dc link current sensing technique that eliminates the errors associated with the current transducers and helps avoid dc current injection into the grid when using a transformerless grid connect inverter system.
Proceedings ArticleDOI
Analytical calculation of the RMS current stress on the DC link capacitor of voltage DC link PWM converter systems
TL;DR: In this paper, a simple analytical expression for the current stress on the DC link capacitor of a voltage DC link converter system, as caused by the load-side inverter, is derived.
References
More filters
Journal ArticleDOI
Microprocessor control of PWM inverters
S.R. Bowes,M.J. Mount +1 more
TL;DR: A detailed comparative study of the various microprocessor-based methods of generating PWM control is presented, and the feasibility of using a microprocessor software-based calculation to generate PWM inverter control over a wide frequency range is demonstrated.
Related Papers (5)
Analytical calculation of the RMS current stress on the DC-link capacitor of voltage-PWM converter systems
Johann W. Kolar,S.D. Round +1 more