Warsaw rectifier

The Warsaw rectifier is a pulse-width modulation (PWM) rectifier invented by in 1992.

Features

The Warsaw Rectifier provides the following features:

Unity power factor
Three-wire input, which does not require a 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 to flow through switches
No cross-short circuiting of switches possible
Dead time is not required

Topology

The 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 and eighteen diodes. The bidirectional switches are connected in a delta topology. The rectifier output does not require a divided DC-link circuit as required in the Vienna rectifier topology.