Page 99 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

Converting Ahead
The choke in the forward converter transfers the current whether or not the transistor is conducting. To maintain
the energy flow across the load during the transistor’s off-time, the diode within the device conducts the current.
Part of the electrical power is passed to the resultant load and stored by the choke during the On phase.

Flyback Converter
With a flyback converter, the inductor’s magnetic field saves energy when the switch is turned on. Energy is
released into the resulting voltage circuit when the toggle switch stays in the open position. The output voltage in
a flyback converter determines its Duty cycle.
Flyback converter with self-oscillation
It is predicated on the Flyback theory. A current across the transformer primary begins to ramp up linear with
the slope Vin/Lp during conduction. The quick recovery rectifier begins to function in reverse biassed and holds
the conducting transistors ON as a result of the voltage that is induced in the secondary winding and feedback
winding. When the current hits its maximum value, the core starts to saturate. As a result, the fixed base motor
supported by input windings is unable to withstand a sudden increase in current. As a result, the switching starts
to emerge from saturation.
Advantages and Disadvantages of SMPS:
Given below the Advantages and Disadvantages of SMPS :
Advantages of SMPS
The SMPS weighs relatively little.
The production spectrum of SMPS is broad.

The switch-mode power supply has a compact size.
Strongly anti-interference.
It is recommended to use SMPS power consumption, which is normally between 60 – 70 percent.
Disadvantages of SMPS
The SMPS has a very high level of complexity.

There is only one voltage output in an SMPS.
SMPS control is poorer and its output ripple is higher.
In the case of SMPS, the production reflect is substantial and its control is inadequate.
SMPS usage is limited to step-down regulation.
Applications of SMPS:
Their main applications are in power stations, refrigerators, ovens, and personal computers.

A frequency converter can be used to convert D.C. voltages to D.C. and A.C. voltages to A.C.
They are utilized to supply variable power and voltages in factories and manufacturing facilities.
They are also utilized in power plants, servers, airports, railroads, security systems, and railroads.
These are found in contemporary smartphones.
Uncontrolled DV input voltage balancing is another application for the SMPS.

They are employed in electrical machinery.
The auto industry also makes use of SMPS devices.
The purpose of the SMPS is to balance the excess current and stabilize the electric current.
They are compatible with electromagnetic fields.
Chopper Circuit:
Chopper circuits are known as DC to DC converters. Similar to the transformers of the AC circuit, choppers are
used to step up and step down the DC power. They change the fixed DC power to variable DC power. Using
these, DC power supplied to the devices can be adjusted to the required amount.

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CITS : E & H - Electronics Mechanic - Lesson 48 - 55