Power Semiconductor Systems II

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Presentation transcript:

Power Semiconductor Systems II Author: Ales Havel E-mail: ales.havel@vsb.cz Phone: 5937 Office: EA333 Web: http://homen.vsb.cz/~hav278/ Power Semiconductor Systems II

Content of the presentation Main types of frequency converters AC-DC converters DC-DC converters DC-AC converters AC-AC converters Direct frequency converters Cycloconverters Indirect frequency converters Converters with voltage type of the DC link Converters with current type of the DC link

Power converters A power semiconductor converter is an electrical device for converting electrical energy.

Converters with voltage type of the DC link General characteristics: Creation of output AC voltage with utilization of the voltage type of the DC link Regulation of output values (voltage, current, frequency) by the output power inverter Filtration of the voltage in the DC link by the capacitor battery Relatively easy control algorithms due to small number of switches High dynamics, possibility of high switching frequencies MOSFETs for low power, IGBT for medium power and IGCT or GTO for high power applications 6-pulse diode rectifier or 4-quadrant pulse voltage rectifier 3 phase voltage inverter

Converters with voltage type of the DC link Indirect frequency converter with 6-pulse diode rectifier and voltage inverter Indirect frequency converter with 4-quadrant pulse voltage rectifier and voltage inverter

Converters with voltage type of the DC link Switching frequency 0.5kHz Switching frequency 10kHz

Converters with current type of the DC link General characteristics: Creation of output AC current with utilization of the current type of the DC link Regulation of output values (voltage, current, frequency) by the output power inverter Filtration of the current in the DC link by the power coil Relatively easy control algorithms due to small number of switches High dynamics, possibility of medium and high switching frequencies High power applications, utilization of IGBT, GTO and IGCT power parts The absence of higher harmonics, controlled power factor 6-pulse thyristor rectifier or 4-quadrant pulse current rectifier 3-phase current inverter with capacitor battery

Converters with current type of the DC link Indirect frequency converter with 6-pulse thyristor rectifier and current inverter Indirect frequency converter with 4-quadrant pulse current rectifier and current inverter

Converters with current type of the DC link Switching frequency 0.5kHz Switching frequency 5kHz

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