New feedforward space-vector PWM method to obtain balanced AC output voltages in a three-level neutral-point-clamped converterIEEE Transactions on Industrial Electronics - Tập 49 Số 5 - Trang 1026-1034 - 2002
J. Pou, D. Boroyevich, R. Pindado
In three-level neutral-point-clamped voltage-source inverters, proper modulation allows the average voltages of the DC-link capacitors to be kept at one-half the level of the DC-link voltage. However, in some operating conditions, a low-frequency ripple appears in the neutral-point potential and its frequency is three times that of the output voltages. As a result, the output voltages also have lo...... hiện toàn bộ
#Space vector pulse width modulation #Voltage #Pulse width modulation inverters #Capacitors #Frequency #Power electronics #Power engineering and energy #Pulse width modulation #Pulse width modulation converters #Bridge circuits
Fault management of multicell convertersIEEE Transactions on Industrial Electronics - Tập 49 Số 5 - Trang 988-997 - 2002
C. Turpin, P. Baudesson, F. Richardeau, F. Forest, T.A. Meynard
Component counts and oversimplified reliability rules may lead to the conclusion that multilevel converters are less safe than two-level converters, just because they use more components. A better approach might be to consider that they use a different arrangement of components and also that the consequence of faults may be very different. This paper is focused on the study of the consequences of ...... hiện toàn bộ
#Circuit faults #Switches #Insulated gate bipolar transistors #Explosions #Switching circuits #Leg #Switching converters #Zero voltage switching #Electrical fault detection #Voltage control