power electronics
DESCRIPTION
بسم الله الرحمن الرحيم. The Islamic University of Gaza Faculty of Engineering Electrical Engineering Department. POWER ELECTRONICS. EELE 5450 — Summer 2012. Instructor: Eng. Jalal Al Roumy. Lecture 2. Chapter One. - PowerPoint PPT PresentationTRANSCRIPT
POWER ELECTRONICS
Instructor: Eng. Jalal Al Roumy
The Islamic University of GazaFaculty of EngineeringElectrical Engineering Department
الرحمن الله بسمالرحيم
EELE 5450 — Summer 2012
Lecture 2
Chapter One
Question: What are power electronic devices?
Answer: Fast switches that can handle high voltages and currents
Question: Why do we need these fast switches?
Answer: To efficiently convert AC to DC, DC to DC, or DC to AC, or to efficiently control average power flow.
A switch
Rugged, reliable, efficient, long lived, but not very fast
Chapter One
Chapter One
is fast − can open and close instantly (thus no switching losses), and at a high rate (i.e., operating frequency)
when closed, can conduct any amount of current with no internal voltage drop (thus no conduction losses)
when open, will conduct no current and can withstand any voltage without breakdown
will be unidirectional or asymmetric (that is an inherent property of power electronic devices, and we can always place two switches in anti-parallel and use blocking diodes to prevent backward conduction)
The ideal power electronic device is a perfect switch that
Chapter One
A Review of Power electronics Applications
Chapter One
Chapter One
Chapter One
Chapter One
Chapter One
AC-to DC Converter
Chapter One
AC-to DC Converter
Chapter One
AC Voltage Controllers
Chapter One
AC Voltage Controllers
Chapter One
DC-to AC Inverters
Chapter One
DC-to AC Inverters
Chapter One
DC-to AC Inverters
Chapter One
DC-to-AC Inverter
Chapter One
DC-to DC Chopper
Chapter One
AC-to AC Converter
Chapter One
Line Commutated Inverter
H.W#1
H.W#1
End of Lecture
In no more than one page: • BMW i8 (Plug-in Hybrid car)