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Advanced Power

ElectronicsTopic Presentation

Prepared by: Saddam Ratrout

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Pulse Width Modulation

Technique(Oriented for Inverters )

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Presentation content PWM General Concept.

Inverter.

PWM.

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inverter Can be classied in de!erent "ays

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1#p$ase% 3#p$ase• Strin& Inverters% Micro inverters

• Stand alone% Grid tie

• Re&ular o! Multi#level inverters

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usage ("o main uses:• In po"er system applications:

# Inter!ace Rene"able ener&y sources# )C#)C (ransmission

• Control *C motors

# +olta&e source current control inverters,vector control-

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•  ($e output volta&e $as aconstant value "$ic$ can onlybe c$an&ed by ad/ustin& t$eintermediate circuit volta&e.

• *ccordin& to 0ourier analysis% t$eamplitude o! t$e !undamental!reuency ! 1 is:

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UniPolar PWM

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Block PWM (BPWM)

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Output Voltage

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Output Current

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Sine PWM (SPWM)

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Output Voltage

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Output Current

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Increasin& s"itc$in& !reuency  better per!ormance

'8$9 instead o! 18$9 1'

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PWM Construction

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3-phase PWM inverter

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Other Types of PWM

• ipolar PWM

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Super Sine PWM ,0or 3#p$ase inverter only-• Space +ector PWM ,0or 3#p$ase inverter only-

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Thank You

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