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Basic Strategies in Power Electronics
Referents: Prof. Dr.Ing. HansGeorg Herzog
([email protected]) Prof. Dr.Ing. Ralph Kennel
([email protected]) Technische Universitt Mnchen
Arcisstrae 21 80333 Mnchen
Germany
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Signal Electronics Power Elektronics
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Emitter Topology
why?
Basis Topology Collector Topology
which topology is that ?
Emitter Topology
Basis Topology Collector Topology
why ?
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Fundamental Structure of Power Electronics
signal electronics
driver converter
filter
mains
load
filter
power electronic system
electronics
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Basic Strategies in Power Electronics
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(idealized) main components in power electronics
voltage source
switch (power device)
current source
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Basic Strategies in Power Electronics
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voltage source
current source
capacitor
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(idealized) main components in power electronics
switch (power device)
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Basic Strategies in Power Electronics
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voltage source
current source
capacitor
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= inductance
(idealized) main components in power electronics
switch (power device)
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Basic Strategies in Power Electronics
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In which cases can (power semiconductor) switches be used ?
voltage source switch (power device)
current source
operation point
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Basic Strategies in Power Electronics
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voltage source
operation point ?
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it is not possible to connect 2 voltage sources like this
voltage source switch (power device)
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Basic Strategies in Power Electronics
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current source
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the same is valid for 2 current sources
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voltage source switch (power device)
operation point ?
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Basic Strategies in Power Electronics
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current source current source
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what can one do, if 2 current sources have to be connected
anyway ?
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one changes one of the current sources to a voltage source
how ???
with a capacitor !!!
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operation point
voltage source switch (power device)
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Basic Strategies in Power Electronics
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voltage source
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what can one do, if 2 voltage sources have to be connected ?
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one changes one of the voltage sources to a current source
how ???
with an inductance !!!
current source
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operation point
voltage source switch (power device)
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Basic Strategies in Power Electronics
examples
electrical (voltage) power supply
= voltage source
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electrical motor
= voltage source with inductance
= current source
power electronics (inverter)
does that work ?
YES !
this is a line commutated inverter !
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Basic Strategies in Power Electronics
electrical (DC voltage) board power supply
= voltage source
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electrical motor
= voltage source with inductance
= current source
power electronics (inverter)
does that work ?
YES !
this is a drive in automotive application !
examples
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Basic Strategies in Power Electronics
electrical (voltage) power supply
= voltage source
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electrical motor
= voltage source with inductance
= current source
voltage source inverter (VSI)
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power electronics (rectifier)
power electronics (inverter)
capacitor in the DC link
= voltage source
does that work ?
YES !
NO !
an inductance has to be integrated
either here or here
examples
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Basic Strategies in Power Electronics
electrical (DC voltage) board power supply
= voltage source
power electronics (DC/DC converter)
does that work ?
electrical (DC voltage) board power supply
= voltage source
e. g. 42 V e. g. 12 V
not directly ! an inductance has to be integrated in many DC/DC
convertters, however, an inductance is already integrated
examples
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Electrical Energy Conversion by Converters (Power
Electronics)
Rectifier Inverter
Converter if output frequency = input frequency :
(AC) Power Controller
DC/DC Converter Chopper Controller
Gleichrichter Wechselrichter
Gleichstromsteller
Umrichter (bei Frequenz = 0 : Drehstromsteller)
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Converters converters Stromrichter
buck converter Tiefsetzsteller
(AC) power controller Drehstromsteller
chopper controller Gleichstromsteller
converters Umrichter
power controllers Steller
boost converter Hochsetzsteller
direct converter Direktumrichter
cyclo converter
matrix converter Matrixumrichter
Rectifier Gleichrichter
Inverter Wechselrichter
link inverter Zwischenkreisumrichter
current source inverter (CSI)
Stromzwischenkreisumrichter
resonance inverter Resonanzumrichter
voltage source inverter (VSI)
Spannungszwischenkreisumrichter
