THEORY - 113 :- SMPS

 What is SMPS (Switch-Mode Power Supply)?

The full name of SMPS is Switch-Mode Power Supply. SMPS is defined in simple language when the need for electricity comes in the form of a switch. In which electrical energy is converted from one form to another with essential properties called SMPS. This power is used to obtain a regulatory DC input voltage from DC output or uncontrollable AC for power. SMPS is just as complex as any other power supply system. This is a power source used for loading.

SMPS is an important device for a wide variety of electrical and electronic devices. Which provides it with a source of power consumption specifically designed for electronic projects?

 

Working Principle of SMPS (Switch Mode Power Supply):

The working principle of switch-mode power supply topologies is as follows:

1. AC-DC Converter SMPS Working:

In this type of SMPS, the input supply is AC and in the output, we get DC supply. Rectifiers and filters are used to convert this AC power to DC. This uncontrollable DC voltage is given to the affected power factor correction circuits. This is because there is a low current pulse inside the rectifier around the peak of the voltage.

This includes high-frequency energy which influences to reduce the power factor. This is due to power conversion but we have used AC input instead of DC input supply. Therefore, a combination of rectifier and filter, this block diagram is used to convert AC to DC, and switching an operation is done using a power muffle amplifier.

MOSFET transistors use low resistance and are capable of resisting high currents. The switching frequency is chosen so that normal humans (above 20KHz) must be kept low and the operation of the switch is controlled using a PWM oscillator.

Again this AC voltage is given to the output of the transformer as shown in the figure or the voltage level goes down. After that, the output of this transformer is fixed and smoothed using the Output filter and corrector. The output voltage is controlled by the reaction circuit compared to the reference voltage.

Advantages of Smps:

The benefits of SMPS are as follows:

High efficiency:

The main advantage of SMPS is that it is more efficient than linear regulators. This is because the switching transistor dissipates a little power when it acts as a switch.

Compact:

Forms SMPS can be made more compact as a result of higher efficiency and lower levels of heat dissipation.

Costs:

Switch-mode is the value of a point making the power supply. Efficiency The high efficiency and switching nature of the design means that the standby power loss is often lower than that of transformers and this reduces costs.

Flexible Technology:

The SMPS feature can be used to provide high-efficiency voltage conversion to voltage step-up or “boost” applications or to step-down “buck” applications.

Applications of SMPS:

The application of SMPS is as follows:

•  The most common use of this is in computers.
•  Smps is used in security systems.
•  This is used in the railway system.
•  It is also used in battery chargers.
•  It is also widely used in machine tool industries.

 

Questionnaires  

1. What is the main function of SMPS?

SMPS is a switch-mode power supply. A type of high-frequency power conversion device and abbreviation for power supply device. Its function is to convert the required voltage or current level by various forms of architecture.

2. How does a switch power supply work?

SMPS works by turning the main power on and off at a high speed to reduce the voltage. In such a case the reduction in voltage depends on the ratio of time and off time. Switching happens very quickly, 10,000 times or faster per second.

3. What is SMPS short answer?

SMPS stands for Switch-Mode-Power-Supply. It is used in all types of computers. Today’s modern computers have an SMPS that takes the improved AC input power from the board in the house, by making a power factor correction and then converting the output to a single or lower voltage DC output.

4. What are SMPS Applications?

The application of SMPS is as follows:

·         The most common use of this is in computers.

·         Smps is used in security systems.

·         This is used in the railway system.

·         It is also used in battery chargers.

·         It is also widely used in machine tool industries.