Download
1 / 25
280 likes | 535 Views
EEL 4242 POWER ELECTRONICS . DIODE RECTIFIERS . Single-Phase Half-wave Rectifier . Figure 3.1 . Input Waveforms . Figure 3.2 . Half-wave Rectifier with RL Load . Figure 3.3 . Full-Wave Rectifier (center-tapped) . Figure 3.5 . Full-Wave Bridge Rectifier . Figure 3.6 .
E N D
EEL 4242POWER ELECTRONICS DIODE RECTIFIERS
Single-Phase Half-wave Rectifier Figure 3.1
Input Waveforms Figure 3.2
Half-wave Rectifier with RL Load Figure 3.3
Full-Wave Rectifier (center-tapped) Figure 3.5
Full-Wave Bridge Rectifier Figure 3.6
Bridge Rectifier (motor load) Figure 3.7
Bridge Rectifier (RL load) Figure 3.8
Bridge Rectifier (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0
Bridge Rectifier (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0
Boundary of continuous and discontinuous (single-phase) Figure 3.9
Multiphase Rectifiers Figure 3.12
Three-Phase Bridge Rectifier Figure 3.13
Waveforms and Conduction Times Figure 3.14
3-Phase Bridge Rectifier (RL Load) Figure 3.15
Three-Phase Bridge Rectifier (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0
Three-Phase Bridge (RL load) • Case 1: Continuous conduction, Io >0 • Case 2: Discontinuous conduction, Io =0
Boundary of continuous and discontinuous (three-phase) Figure 3.16
DC Filters Figure 3.18
AC Filters Figure 3.19
Single-Phase Rectifier with C-Filter Figure 3.22
Single-Phase Rectifier with C-Filter Figure 3.22
Output Voltage with C-Filter Figure 3.26
Effects of Source Inductances Figure 3.27
Summary • Diode rectifiers convert an ac voltage to a dc voltage. • The output voltage contain ripples which can be removed by filters. • Depending on time constant of the load, the load current may be discontinuous. • Line inductances cause overlap and reduce the effective dc output voltage. • What was the major idea? • What was the muddiest idea?
