Warsaw rectifier explained

The Warsaw rectifier is a pulse-width modulation (PWM) rectifier, invented by in 1992.^{[1] [2]}

Features

The Warsaw Rectifier provides following features:

• Unity power factor ^[3]
• Three-wire input, does not require connection to the neutral wire
• Ohmic behaviour
• Controlled output voltage
• Simple control scheme
• Low power losses

Unique features of the Warsaw Rectifier:

• Short circuits do not cause current flow through switches
• No cross short circuit of switches possible
• Dead time not required

Topology

Warsaw Rectifier is a unidirectional, three-phase, three-switch two-level pulse-width modulation (PWM) rectifier. This topology uses three insulated-gate field effect transistors (IGFET) and eighteen diodes. The bidirectional switches (made as four diodes and one IGFET circuit) are connected in a delta topology. The rectifier output does not require a divided DC-link circuit as in the Vienna Rectifier topology.^{[4] [5]}

See also

• Vienna rectifier

Notes and References

1. Koczara W., "Controlled Rectifier", Polish Patent PL 167855, Apr. 17, 1992.
2. Koczara W., "Unity factor three phase rectifier", Power Quality ’92 Conference Europe, Münich, October 1992, 79–88, 14–15.
3. Koczara W., Bialoskorki P., "Unity power factor three phase rectifiers" Power Electronics Specialists Conference, 1993. PESC '93 Record., 24th Annual IEEE at https://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=471997&queryText=koczara&sortType=asc_p_Publication_Year
4. D. Carlton, W.G. Dunford, M. Edmunds, “Continuous conduction mode operation of a three-phase power-factor correction circuit with quasi tri-directional switches” Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE https://ieeexplore.ieee.org/document/789004/
5. Bałkowiec T., “Three Phase Warsaw Boost Rectifier for High Power Variable Speed Power Generation” Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów ElektrycznychPolitechniki Wrocławskiej, Nr 71, 2015 at http://www.imnipe.pwr.wroc.pl