Concordia University
Department of Electrical and Computer
Engineering
Power Electronics (I) ELEC-433/6411
Week 3
Line frequency diode rectifiers
(Chapter 5)
, Outline
• Introduction
• Single-phase half-wave rectifier
– Resistive and resistive inductive loads. Free-wheeling diode.
• Single-phase full-wave (bridge) rectifier
– DC and AC side components for highly inductive loads
– Calculation of the DC bus voltage and power factor
– Rectifier for DC voltage sources. Grid voltage distortion
• Three-phase full wave (6-pulse) rectifier
– Output voltage and input current components
– Calculation of the DC bus voltage and power factor
• Comparison of single-phase and three-phase rectifiers
2
, Diode rectifier
• Most inexpensive ac-dc converter.
• Output dc voltage is uncontrolled/unregulated
• Unidirectional power flow capability
• Draw highly distorted current from the utility (capa
citive filter)
3
Department of Electrical and Computer
Engineering
Power Electronics (I) ELEC-433/6411
Week 3
Line frequency diode rectifiers
(Chapter 5)
, Outline
• Introduction
• Single-phase half-wave rectifier
– Resistive and resistive inductive loads. Free-wheeling diode.
• Single-phase full-wave (bridge) rectifier
– DC and AC side components for highly inductive loads
– Calculation of the DC bus voltage and power factor
– Rectifier for DC voltage sources. Grid voltage distortion
• Three-phase full wave (6-pulse) rectifier
– Output voltage and input current components
– Calculation of the DC bus voltage and power factor
• Comparison of single-phase and three-phase rectifiers
2
, Diode rectifier
• Most inexpensive ac-dc converter.
• Output dc voltage is uncontrolled/unregulated
• Unidirectional power flow capability
• Draw highly distorted current from the utility (capa
citive filter)
3
