Transcript Diapositiva 1

MECATRONICA 1.
 Principles of electrical engineering
Electrical engineering deals with the study and application of
electricity, electronics and electromagnetism.
Electrical engineering has many sub-disciplines
- Power engineering
- Control –
- Electronic –
- Microelectronics
- Signal processing
- Telecommunication –
- Instrumentation –
- Computer –
- Mechatronics
Sem. 1-2007
Universidad EAFIT Profesores: Hans Ley (Dipl.-Ing.) y
Alejandro Velásquez (MSc.Mechatronics)
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Electronics
 Electronic components
 1. List of electronic components
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1.1 Interconnecting electronic components
1.2 Passive components
1.3 Active components (solid-state)
1.4 Active components (thermionic)
1.5 Display devices
1.6 Electromechanical sensors and actuators
1.7 Thermoelectric devices
1.8 Photoelectric devices
1.9 Antennas
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Universidad EAFIT Profesores: Hans Ley (Dipl.-Ing.) y
Alejandro Velásquez (MSc.Mechatronics)
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1.1 Interconnecting electronic components
 An electrical connector is a device for joining electrical circuits
together. The connection may be temporary, as for portable
equipment, or may require a tool for assembly and removal, or may be
a permanent electrical joint between two wires or devices. There are
hundreds of types of electrical connectors.
Sem. 1-2007
Universidad EAFIT Profesores: Hans Ley (Dipl.-Ing.) y
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1.2 Printed circuit board
 In electronics, printed circuit boards, or PCBs, are used to
mechanically support and electrically connect electronic components
using conductive pathways, or traces, etchedd from copper sheets
laminated onto a non-conductive substrate. Alternative names are
printed wiring board (PWB),and etched wiring board. Populating the
board with electronic components forms a printed circuit assembly
(PCA), also known as a printed circuit board assembly (PCBA).
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1.3 Wire wrap
 Wire wrap is a technique for constructing small numbers of complex
electronics assemblies. It is an alternative technique to the use of
small runs of printed circuit boards, and has the advantage of being
easily changed for prototyping work. It has been used to construct
telephone exchanges, computers, control consoles, radios, radars,
sonars, and other complex pieces of equipment that are needed in
small volumes.
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1.4 Breadboard
 A breadboard is a reusable solderless device used to build a (generally
temporary) prototype of an electronic circuit and for experimenting with
circuit designs. This is in contrast to stripboard (veroboard) and similar
prototyping printed circuit boards, which are used to build more permanent
prototypes or one-offs, and cannot easily be reused. A typical breadboard
will have strips of interconnected electrical terminals, known as bus strips,
down one or both sides—either as part of the main unit or as separate
blocks clipped on—to carry the power rails.
Sem. 1-2007
Universidad EAFIT Profesores: Hans Ley (Dipl.-Ing.) y
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1.5 Stripboard
 Stripboard (often known by the trademark name Veroboard of the Vero
Electronics company) is a type of electronics prototyping board
characterised by a 0.1 inch (2.54 mm) regular grid of holes, with wide strips
running one way all the way along one side of the board. Breaks are
inserted in the tracks, usually around a hole but with care, it is possible to
break between holes to allow for components that have two pin rows only
one position apart such as twin row headers for IDC connectors.
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1.2. Passive elements
1.2.1 Fuse (electrical)
 In electronics and electrical engineering a fuse, short for 'fusible link', is a
type of overcurrent protection device. It has as its critical component: a
metal wire or strip that will melt when heated by a prescribed electric
current, opening the circuit of which it is a part, and so protecting the circuit
from an overcurrent condition..
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1.2.2 Resistor
 A resistor is a two-terminal electrical or electronic component
(measured in Ohm [Ω] ) that resists an electric current by
producing a voltage drop between its terminals in accordance
with Ohm's law.
Ω
[Ω]
Resistor Color Codes
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1.2.3 Capacitor
 A capacitor is an electrical device (measured in Farad [F] ) that can store
energy in the electric field between a pair of closely-spaced conductors
(called 'plates'). When voltage is applied to the capacitor, electric charges of
equal magnitude, but opposite polarity, build up on each plate.
 Capacitors are used in electrical circuits as energy-storage devices. They
can also be used to differentiate between high-frequency and low-frequency
signals and this makes them useful in electronic filters.
 Capacitors are occasionally referred to as condensers. This is now
considered an antiquated term.
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1.2.4 Inductor
 An inductor is a passive electrical device employed in electrical circuits for
its property of inductance. An inductor can take many forms.
 Inductance (measured in henries) is an effect which results from the
magnetic field that forms around a current carrying conductor. Electrical
current through the conductor creates a magnetic flux proportional to the
current. A change in this current creates a change in magnetic flux that, in
turn, generates an electromotive force (emf) that acts to oppose this change
in current.
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1.2.5 Piezoelectric sensor
 A piezoelectric sensor is a device that uses the piezoelectric effect to
measure pressure, acceleration, strain or force by converting them to an
electrical signal.
 Piezoelectric sensors have proven to be versatile tools for the measurement
of various processes. They are used for quality assurance, process control
and process development in many different industries.
 Piezo electric sensors are also seen in nature. Bones act as force sensors.
Once loaded, bones produce charges proportional to the resulting internal
torsion or displacement. Those charges stimulate and drive the build up of
new bone material. This leads to the strengthening of structures where the
internal displacements are the greatest. With time, this causes weaker
structures to increase their strength and stability as material is laid down
proportional to the forces affecting the bone.
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1.2.6 Varistor
 A piezoelectric sensor is a device that uses the piezoelectric effect to
measure pressure, acceleration, strain or force by converting them to an
electrical signal.
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1.2.7 Transformer
 A transformer is an electrical device that transfers energy from one circuit
to another by magnetic coupling with no moving parts. A transformer
comprises two or more coupled windings, or a single tapped winding and, in
most cases, a magnetic core to concentrate magnetic flux. A changing
current in one winding creates a time-varying magnetic flux in the core,
which induces a voltage in the other windings.
 The transformer is one of the simplest of electrical devices, yet transformer
designs and materials continue to be improved.
 Transformers come in a range of sizes from a thumbnail-sized coupling
transformer hidden inside a stage microphone to huge gigawatt units used
to interconnect large portions of national power grids. All operate with the
same basic principles and with many similarities in their parts.
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1.2.8 Switch
 A switch is a device for changing the course (or flow) of a circuit. The
prototypical model is a mechanical device (for example a railroad switch)
which can be disconnected from one course and connected to another. The
term "switch" typically refers to electrical power or electronic
telecommunication circuits. In applications where multiple switching options
are required (e.g., a telephone service), mechanical switches have long
been replaced by electronic variants which can be intelligently controlled
and automated.
 The switch is referred to as a "gate" when abstracted to mathematical form.
In the philosophy of logic, operational arguments are represented as logic
gates. The use of electronic gates to function as a system of logical gates is
the fundamental basis for the computer — a computer is a system of
electronic switches which function as logical gates.
Sem. 1-2007
Universidad EAFIT Profesores: Hans Ley (Dipl.-Ing.) y
Alejandro Velásquez (MSc.Mechatronics)
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1.2.9 Circuit - Breaker
 A circuit breaker is an automatically-operated electrical switch designed to
protect an electrical circuit from damage caused by overload or short circuit.
Unlike a fuse, which operates once and then has to be replaced, a circuit
breaker can be reset (either manually or automatically) to resume normal
operation. Circuit breakers are made in varying sizes, from small devices
that protect an individual household appliance up to large switchgear
designed to protect high voltage circuits feeding an entire city.
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1.3 Active components
1.3.1 Diode
 In electronics, a diode is a component that restricts the direction of
movement of charge carriers. Essentially, it allows an electric current to flow
in one direction, but blocks it in the opposite direction. Thus, the diode can
be thought of as an electronic version of a check valve. Circuits that require
current flow in only one direction will typically include one or more diodes in
the circuit design.
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There are several types of semiconductor junction diodes:
Normal (p-n) diode
Schottky diodes
Zener -Avalanche –
Photo –
Light-emitting – (LED)
Laser –
Esaki - or Tunnel –
and more …….
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1.3.2 Transistor
 A transistor is a semiconductor device that uses a small amount of voltage
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or electrical current to control a larger change in voltage or current. The
transistor is the fundamental building block of the circuitry that governs the
operation of computers, cellular phones, and all other modern electronics.
Because of its fast response and accuracy, the transistor may be used in a
wide variety of digital and analog functions, including amplification,
switching, voltage regulation, signal modulation, and oscillators. Transistors
may be packaged individually or as part of an integrated circuit chip, which
may hold thousands of transistors in a very small area.
Transistors are categorized by:
Semiconductor material: germanium, silicon, gallium arsenide, silicon
carbide
Structure: BJT, JFET, IGFET (MOSFET), IGBT, "other types"
Polarity: NPN, PNP (BJTs); N-channel, P-channel (FETs)
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Transistor Types
- field effect transistor
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- bipolar transistor
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- Compound transistor
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- IGBT transistor
- SIT/SITh (Static Induction Transistor/Thyristor)
- Darlington transistor
- Photo transistor
Universidad EAFIT Profesores: Hans Ley (Dipl.-Ing.) y
Alejandro Velásquez (MSc.Mechatronics)
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END
Sem. 1-2007
Universidad EAFIT Profesores: Hans Ley (Dipl.-Ing.) y
Alejandro Velásquez (MSc.Mechatronics)
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