Intro to Power Electronics

These flashcards cover key concepts from the 'Intro to Power Electronics' lecture, focusing on energy conversion, power flow, converter types, and components involved in power electronic systems.

Energy Conversion involves the transformation of one or more of an energy source into without an appreciable loss of power.

characteristics; an energy source with another set of characteristics

The characteristics of electricity include Voltage, Current, __, and __.

Frequency; Phases

A source energy while a load energy.

produces; consumes

Power conversion hardware __ an energy source from one set of characteristics to a new set of characteristics.

converts

In Unidirectional power flow, energy flows in __ direction.

one

In Bidirectional power flow, energy flows in __ directions.

two

In Two-Quadrant Operation, either voltage or current always has the same while the other has different .

polarities; polarities

Examples of Four Quadrant Operation include Electric Motor and __.

Solar power inverter

The output voltage of a linear regulator is __ than the input voltage.

less than

The minimum voltage required to maintain regulation is known as __ voltage.

Dropout

Line Regulation measures the ability of a regulator to maintain the with changes to the .

voltage output; input voltage

Load Regulation measures the ability of a regulator to maintain the with changes to the .

voltage output; load current

A Converter steps down voltage, while a Converter steps up voltage.

Buck; Boost

Switch Mode Power Supplies have __ efficiency compared to Linear Power Supplies.

higher

In a buck converter, two switching states are generally denoted as and .

State 1; State 2

When a diode is on, it can be represented as a __.

resistor

Conduction losses are associated with __ current.

conducting

In a buck converter, the average inductor current can be calculated using __ balance.

Charge-Second

In Flyback Converters, energy is stored in the __ inductance during the ON state.

magnetizing

The output voltage of an ideal transformer is related to the input voltage by the __ ratio.

turns

Transformers use __ Law to operate efficiently by relying on the principle of magnetic induction.

Faraday's

Magnetic reluctance is a measure of a material's property to resist the flow of __ through the material.

magnetic flux

The __ density in a magnetic core depends on both the material's permeability and the strength of the magnetic field.

flux

The boundary between Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) occurs at the point where average inductor current equals __.

zero (or minimum)

MOSFETs and Diodes switching losses are significantly influenced by their __ characteristics.

I-V (current-voltage)

The thermal resistance of a power device measures the __ to heat transfer through it.

resistance

Total Harmonic Distortion measures the amount of __ in a signal.

distortion

The duty cycle is defined as the fraction of one period in which a signal or system is __.

active (turned on)