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Lehrveranstaltung„Umwandlung elektrischer Energie mit Leistungselektronik“
StromzwischenkreisumrichterCurrent Source Inverter (CSI)
Prof. Dr.‐Ing. Ralph Kennel
Technische Universität München
Arcisstraße 21
80333 München
Technische Universität MünchenConverters
convertersStromrichter
buck converter
Tiefsetzsteller
(AC) power controllerDrehstromsteller
chopper controllerGleichstromsteller
convertersUmrichter
power controllersSteller
boost converter
Hochsetzsteller
direct converterDirektumrichter
cyclo converter
matrix converterMatrixumrichter
RectifierGleichrichter
InverterWechselrichter
link inverterZwischenkreisumrichter
current source inverter
(CSI)Stromzwischenkreisumrichter
resonance inverterResonanzumrichter
voltage source inverter
(VSI)Spannungszwischenkreisumrichter
Technische Universität MünchenConverters
convertersStromrichter
buck converter
Tiefsetzsteller
(AC) power controllerDrehstromsteller
chopper controllerGleichstromsteller
convertersUmrichter
power controllersSteller
boost converter
Hochsetzsteller
direct converterDirektumrichter
cyclo converter
matrix converterMatrixumrichter
RectifierGleichrichter
InverterWechselrichter
link inverterZwischenkreisumrichter
current source inverter
(CSI)Stromzwischenkreisumrichter
resonance inverterResonanzumrichter
voltage source inverter
(VSI)Spannungszwischenkreisumrichter
Technische Universität München
Basic Strategies in Power Electronics
electrical (voltage) power supply
= voltage source
M
electrical motor
= voltage source with inductance
= current source
voltage source inverter (VSI)
U0
power electronics(rectifier)
power electronics(inverter)
capacitorin the DC link
= voltage source
an inductance has to be integrated
either here or here
Technische Universität München
Basic Strategies in Power Electronics
electrical (voltage) power supply
= voltage source
M
electrical motor
= voltage source with inductance
= current source
current source inverter (CSI)
U0
power electronics(rectifier)
power electronics(inverter)
inductancein the DC link
= current source
Technische Universität München
Basic Strategies in Power Electronics
electrical (voltage) power supply
= voltage source
M
electrical motor
= voltage source with inductance
= current source
current source inverter (CSI)
power electronics(rectifier)
power electronics(inverter)
inductancein the DC link
= current source
Technische Universität München
15.10.09 Grundlagen DC/DC-Wandler
Technische Universität München
15.10.09 Grundlagen DC/DC-Wandler
Technische Universität München
15.10.09 Grundlagen DC/DC-Wandler
Technische Universität München
15.10.09
Technische Universität München
15.10.09
Technische Universität München
15.10.09
Technische Universität München
15.10.09
Technische Universität München
15.10.09
Technische Universität München
In literature you can (sometimes) read …
… that CSIs are less dynamic than VSIs
… this is completely nonsense !!!
Everything you can do with the output current of a VSI
you can do in the same way with the output voltage of a CSI !
with identical dynamics …e. g. using the same PWM !!
Everything you cannot do with the DC voltage of a VSI
you can also not do with the DC current of a CSI !
both are not dynamic at all !!
Current Source Inverter (CSI)
Technische Universität München
In fact there are 2 (!) problematic aspects …
… when using CSIs for electrical drives :
CSI as well as electrical machine are current sources
they have to be decoupled by capacitance(s)
… this might cause dynamic problems between
between the inductances and the capacitances involved
(with electrostatic machines the situation would be better)
Current Source Inverter (CSI)
Technische Universität München
In fact there are 2 (!) problematic aspects …
… when using CSIs for electrical drives :
The connection of several CSIs at the same DC link
is not a reasonable solution
(the problem is our way of thinking … not the CSI technology)
… the combination must be done by serial connection
instead of parallel connection
… however, there is no series of electrical machines based on currents
instead of voltages (e. g. 400 V)
Current Source Inverter (CSI)
Technische Universität München
Thank You !!!
Any Questions ?
Prof. Dr.-Ing. Ralph Kennel
Technische Universität München
Electrical Drive Systems and Power Electronics
