The document discusses the CD 70cc bike rectifier, which converts AC power to DC for battery charging and regulates power delivery. Key components include diodes, bridge rectifiers, zener diodes, resistors, and capacitors, highlighting their functions, advantages, and disadvantages in electronics. It also mentions the BT151 silicon-controlled rectifier and includes a quotation from Albert Einstein.

1. CD 70CC RECTIFIER
Created By:Engr.Muhammad Wajahat
(Biomedical Engineer)
muhammadwajahat1996@gmail.com
0346-3826743

2. Bike Rectifier
 The rectifier
regulator converts
AC power to DC
allowing the
alternator to charge
the battery, and
controls the amount
of power delivered
to the battery.

3. DC And AC
 DC
Direct current is one-directional
flow of electric charge. An
electrochemical cell is a prime
example of DC power.
AC
AC stands for alternating
current and it refers to how
electrons are moving in an
alternating direction in a
conductor.

4. Diode
 A diode is a two-terminal
electronic component that
conducts current primarily in
one direction.
 Some of their most common
applications include turning AC
to DC, isolating signals from a
supply, and mixing signals.
 Silicon diodes have a forward
voltage of approximately 0.7
volts. Germanium diodes have
a forward voltage of
approximately 0.3 volts.

5. Bridge Rectifiers
 bridge rectifiers as a type of
full-wave rectifier that uses
four or more diodes.
 A bridge circuit configuration
to efficiently convert
alternating (AC) current to a
direct (DC) current.

6. Zener Diode
 A Zener diode is a silicon
semiconductor device that
permits current to flow in
either a forward or reverse
direction.
 A Zener diode operates just
like a normal diode when it
is forward-biased. However,
a small leakage current
flows through the diode
when connected in reverse
biased mode.

7. Register
 A resistor is a passive two-terminal
electrical component that implements
electrical resistance as a circuit
element.
 Resistors can also be used to provide a
specific voltage for an active device
such as a transistor.

8. Capacitor
 A capacitor is a device that stores
electrical energy in an electric
field. It is a passive electronic
component with two terminals.
 A capacitor works on the principle
that the capacitance of a conductor
increases appreciably when an
earthed conductor is brought near
it.

9. Advantages and Disadvantages of Diode
 It functions as rectifier in order to convert
alternating current into direct current.
 It is used to suppress voltage spikes. Moreover it
is used to protect electronic components which are
vulnerable to reverse voltages.
 It is fast in operation and does not require any
warm up time.
 It is very cheap compare to vacuum tube.
 Semiconductor diode does not generate any
current when voltage is not applied.
 It operates at low voltage and hence it consumes
less power.
 It is smaller in size and light in weight.
 It has long life.
 Semiconductor diode can not withstand very high
reverse voltage.
 It offers poor response.
 It has reverse saturation current.
 Noise level is high in semiconductor device at
high frequencies.
 Different diodes have unique benefits and
drawbacks and hence refer individual advantages
and disadvantages of respective diode.

10. Advantages and Disadvantages of B.R
 It can be used in application
floating output terminals, no
output terminal is grounded
 Transformer utilization factor,
in case of the bridge rectifier,
is higher than that of a center
tap rectifier.
 If stepping up or stepping
down of the AC voltage is not
needed, and it does not even
require any transformer.
 For high voltage applications,
bridge rectifier preferred,
because it has high peak
inverse voltage.
 In this type, two extra diodes are
used. So it requires four
semiconducting didoes.
 Two diodes in series conduct at a
time on alternate half-cycles.
This creates a problem when low
DC voltages are required. This
leads to poor voltage regulation.
 Internal resistance voltage drop
is twice than that of the center
tap circuit.
 If stepping up or stepping down
of voltage is not needed, we may
even do without a transformer.

11. BT151(SCR)
 The SCR is a three-terminal
thyristor that acts like a silicon
rectifier diode whose conductor
is controlled by an input
current.
 BT151 is a medium power 12A
silicon-controlled rectifier that
comes in a TO-220 package
that can be used to switch
medium power AC/DC loads
and can handle high DC pulses.

12. Pin Configuration of Bike Rectifier

13. Circuit Diagram

14. THANK’S
“Every body is a genius .But if you judge a fish by its
ability to climb a tree, it will live its whole life
believing that its is stupid”
Albert Einstein