1. MINI INVERTER 12V TO
220V
GUIDEDBY: DR MARY VINAYA PRESENTED BY: ADHEENA.V.S
PERSIS ABEY
SHAMLA.K
2. OBJECTIVE
To convert a 12V DC power supply into a 240V AC output
using a transformer to step up the power to upto 1KW
3. MINI INVERTER
• It is a dc-to-ac power inverters which aim to efficiently transform
a DC power source into a high-voltage AC source similar to the
power that would be available at an electrical wall outlet.
• Inverters are used for many applications, s
• s in situations where low-voltage DC sources such as batteries, solar
panels, or fuel cells must be converted so that devices can run off of
AC power. One example of such a situation would be converting
electrical power from a car battery to run a laptop, TV, or cell phone.
4. WORKING PROCESS
1. The 100-watt inverter circuit uses a CD 4047 IC as an astable
multivibrator to generate two 180-degree out-of-phase 100 HZ pulse
trains.
2.The pulse trains are pre-amplified by two TIP122 transistors.
3.The pre-amplified signals are further amplified by four 2n3055
transistors, with two transistors used for each half cycle.
4.The amplified signals are used to drive an inverter transformer,
producing a 220v ac output at the transformer's secondary.
8. COMPONENT DISCRIPTION
•CD4047BC
• The CD4047B IC can operate in mono-stable or
a-stable modes.
• In mono-stable mode, an external capacitor
and resistor are used to control the output
pulse width.
• In a-stable mode, the output frequency is
determined by the external timing components.
• A-stable operation is enabled by a high level
on the a-stable input or a low level on the
mono-stable input.
• The Q and Q outputs provide a frequency
determined by the timing components, while
the oscillator output offers double the
frequency of Q with an unspecified duty cycle.
9. •PLUG SOCKET
• The ring circuit system, also known as "ring main," is used to provide
a single-phase electrical supply for running single-phase motors.
• In a ring circuit, instead of individually wiring each socket, a cable is
brought from the distribution board and connected in sequence to
multiple sockets before returning to the distribution board and being
connected to the same fuse or circuit breaker.
• This setup results in significant copper savings in the wiring of the
circuit.
• The fuse or circuit breaker used in the distribution board must be
rated for the maximum current that the ring can carry, typically 30A
or 32A for a breaker.
• To ensure safety and proper operation, the plugs used to connect the
10. MCB(MINIATURE CIRCUIT BREAKER)
• Their primary function is to detect fault conditions and immediately
interrupt the continuity of electrical flow.
• Circuit breakers are electrical switches that automatically protect circuits
from damage caused by overload or short circuit.
• Unlike fuses, which need to be replaced after operation, circuit breakers
can be manually or automatically reset to restore normal operations.
• Circuit breakers come in various sizes, ranging from small devices that
protect individual household appliances to large switchgear used to
safeguard high voltage circuits supplying entire cities.
• They play a crucial role in ensuring electrical safety by preventing
excessive current from flowing through a circuit, thus preventing
overheating, fire hazards, and damage to equipment.
11. •BATTERY 12V
• The inverter circuit is powered by a 12V rechargeable battery.
• The power input to the circuit is controlled by a relay that connects the
battery supply to the control circuit.
• A transistor (TR3) and a light-emitting diode (LED) are used to indicate
whether power is being supplied from the rechargeable battery through
the circuit or not.
• If power is passing through the circuit, a 5.1-volt zener diode activates
transistor CRR3, allowing current to flow and turning on the LED.
• The LED serves as a visual indicator to show that the power from the
rechargeable battery is being successfully transmitted through the
circuit.
13. •TIP 3055/2N3055
• The 2N3055 transistor is a silicon NPN
power transistor designed for general-
purpose applications.
• RCA introduced the 2N3055 in the early
1960s, utilizing their "hometaxial" power
transistor process.
• As one of the pioneering silicon power
transistors, the 2N3055 was known for its
exceptional immunity to second
breakdown.
• The transistor found extensive use in
various applications, with a notable
presence in audio power amplifiers and
linear power supplies.
• Its superior characteristics, including
reliability and performance, made it a
popular choice for amplification and
power distribution in electronic circuits.
14. •TRANSFORMER
.
• The inverter in this design was intended to
provide power for residential or small
business sites.
• The power source for the inverter can be a
standalone system such as a fuel cell,
micro turbine, or solar cells.
• To align with standard practices for home
grid connection, the inverter produces a
single-phase three-wire output.
• In a typical utility system, the high voltage
from the three-phase power available at
the utility pole is transformed down to
120/240V using a center-tapped
transformer.
• The inverter's purpose is to replicate this
voltage conversion process, allowing it to
provide a compatible power output for
home connection.
• This configuration enables safe and
efficient power distribution in
residential systems,
accommodating the electrical
needs of homes and small
businesses.
15. APPLICATIONS
• This circuit can be used in cars and other vehicles to
charge small batteries
• This circuit can be used to drive low power AC motor
• It can be used in solar power system
