Outputs (59)

A cost-effective solution to power the gate drivers of multilevel inverters using the bootstrap power supply technique (2009)
Presentation / Conference Contribution
Klumpner, C., & Shattock, N. A cost-effective solution to power the gate drivers of multilevel inverters using the bootstrap power supply technique. Presented at 2009 IEEE Applied Power Electronics Conference and Exposition (APEC 2009)

Multilevel inverters are traditionally seen as a step forward in DC/AC conversion, providing more output voltage levels, better quality of the generated waveform and lower switching losses than the two-level and can process higher voltages with a giv... Read More about A cost-effective solution to power the gate drivers of multilevel inverters using the bootstrap power supply technique.

Experimental evaluation of hybrid cycloconverters (2009)
Presentation / Conference Contribution
Klumpner, C., Xu, T., & Clare, J. C. Experimental evaluation of hybrid cycloconverters. Presented at Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition (APEC'09)

Power converters consisting of naturally commutated thyristors such as cycloconverters and current source inverters were the first used in driving electrical motors with variable speed but now due to their inferior performance compared to forced comm... Read More about Experimental evaluation of hybrid cycloconverters.

Implementation of a hybrid AC-AC direct power converter with unity voltage transfer (2008)
Journal Article
Wijekoon, T., Klumpner, C., Zanchetta, P., & Wheeler, P. (2008). Implementation of a hybrid AC-AC direct power converter with unity voltage transfer. IEEE Transactions on Power Electronics, 23(4), https://doi.org/10.1109/TPEL.2008.924601

This paper presents a novel hybrid direct power converter (HDPC) which overcomes the two main disadvantages of matrix converters: limited voltage transfer ratio and low immunity to grid disturbance. The proposed converter is formed by integrating a r... Read More about Implementation of a hybrid AC-AC direct power converter with unity voltage transfer.

Hybrid matrix converter topologies: an exploration of benefits (2008)
Presentation / Conference Contribution
Klumpner, C., & Pitic, C. Hybrid matrix converter topologies: an exploration of benefits. Presented at 39th Power Electronics Specialists Conference (PESC)

Matrix converters are direct AC/AC power converters that can operate with sinusoidal output/input voltage/currents without the need of passive components to store energy, which means that they are grid friendly and have a great weight/volume reductio... Read More about Hybrid matrix converter topologies: an exploration of benefits.

A new three-level sparse indirect matrix converter (2006)
Presentation / Conference Contribution
Klumpner, C., Lee, M. Y., & Wheeler, P. (2006, November). A new three-level sparse indirect matrix converter. Presented at 32nd Annual Conference of IEEE Industrial Electronics Society (IECON 2006), Paris, France

Matrix converters are forced commutated single stage AC/AC direct frequency changers able to achieve sine wave in and out operation by being able to connect any input phase to any output phase via a 3x3 matrix of bi-directional switches. Indirect two... Read More about A new three-level sparse indirect matrix converter.

A new class of hybrid AC/AC direct power converters
Presentation / Conference Contribution
Klumpner, C., Wijekoon, T., & Wheeler, P. A new class of hybrid AC/AC direct power converters. Presented at 2005 IEEE Industry Applications Society Annual Meeting

Variable voltage and variable frequency conversion of electrical energy from an AC source to an AC load is done in traditional power converters via a DC-link where an energy storage element (electrolytic capacitors) is situated. Despite its well-know... Read More about A new class of hybrid AC/AC direct power converters.

A hybrid indirect matrix converter immune to unbalanced voltage supply, with reduced switching losses and improved voltage transfer ratio
Presentation / Conference Contribution
Klumpner, C. A hybrid indirect matrix converter immune to unbalanced voltage supply, with reduced switching losses and improved voltage transfer ratio. Presented at 2006 IEEE Applied Power Electronics Conference and Exposition (APEC 2006)

Achieving a compact and efficient design of power electronic converters is not a straightforward procedure: minimizing the size of the filter requires a higher switching frequency that causes additional switching losses that will require a larger hea... Read More about A hybrid indirect matrix converter immune to unbalanced voltage supply, with reduced switching losses and improved voltage transfer ratio.

A new two-stage voltage source inverter with modulated DC-link voltage and reduced switching losses
Presentation / Conference Contribution
Klumpner, C. A new two-stage voltage source inverter with modulated DC-link voltage and reduced switching losses. Presented at 32nd Annual Conference of IEEE Industrial Electronics Society (IECON 2006)

This paper proposes a new DC/AC power converter topology that is obtained by merging a buck type DC/DC converter and a DC/AC three-phase PWM Voltage Source Inverter (VSI) without the need of the passive components (smoothing inductor and capacitance)... Read More about A new two-stage voltage source inverter with modulated DC-link voltage and reduced switching losses.

A new hybrid cycloconverter with smooth output voltage generation capability and accurate control of the circulating current
Presentation / Conference Contribution
Klumpner, C., Xu, T., & Clare, J. A new hybrid cycloconverter with smooth output voltage generation capability and accurate control of the circulating current. Presented at 32nd Annual Conference of IEEE Industrial Electronics (IECON 2006)

Nowadays, power electronic converters based exclusively on IGBTs deliver excellent load side performance up to megawatt powers in the low voltage range (200-690V) and are steadily gaining performance in the medium voltage range as well. However, the... Read More about A new hybrid cycloconverter with smooth output voltage generation capability and accurate control of the circulating current.

A new three-level indirect matrix converter with reduced number of switches
Presentation / Conference Contribution
Klumpner, C., Lee, M. Y., Pitic, C., Wheeler, P., & Zanchetta, P. A new three-level indirect matrix converter with reduced number of switches. Presented at IEEE-IAS 2007 Annual Meeting

Matrix converters are sine wave in/out forced commutated single-stage AC/AC direct frequency changers using a single bi-directional switch to connect any input to any output. Indirect two-stage matrix converters provide similar input and output perfo... Read More about A new three-level indirect matrix converter with reduced number of switches.