Introduction:

In this script, we will discuss Power Electronics, In this blog, we will differ.....

  • What is power electronics?
  • The Relationship of power electronics to power, electronics, and control. 
  • The Major Components of a Power Electronic System
  • Application of Power Electronics
  • List the Merits and Demerits of Power Electronics

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History of Power Electronics:

The history of power electronics began with the introduction of the mercury rectifier in 1900. Then the metal tank rectifier, grid-controlled vacuum-tube rectifier, ignition, phanotron, and thyratron ware were introduced gradually. These devices were applied for power control until the 1950s.

The first electronics revolution began in 1948 with the invention of the silicon transistor at Bell Telephone Laboratories by Bardeen, Brattain, and Schokley. The next breakthrough, in 1956, was also from Bell Laboratories: The indentation of the PNPN triggering transistor, which was defined as a thyristor or silicon-controlled rectifier(SCR).

The second electronics revolution began in 1958 with the development of the commercial thyristor by the General Electric Company. 

What is power electronics?

Power electronics consists of power, electronics, and control. Power electronics may be represented as the application of solid-state electronics to control and convert electric power.

The Relationship of power electronics to power, electronics, and control.

We know that power electronics consist is power, electronics, and control.

Power electronics has revolutionized the concept of power control of power conversion and control of electric motor drives. 

Controls work as the steady-state and dynamic characteristics of closed-loop systems. 

Power work as the static and rotating power equipment for the generation, transmission, and distribution of electric energy. 

Electronics work as solid-state devices and circuits for signal processing to meet the control objective.

Figure: Relationship of power electronics to power, electronics, and control.

We can show in the figure, that the arrow points to the direction of the current flow from the anode (A) to the cathode (K). It can be turned on and off by a signal to the gate terminal (G). When there is no get signal .it normally remains in the off-state, works as an open circuit, and can withstand a voltage across terminals A and K.

The Major Components of a Power Electronic System:
The Major Components of a Power Electronic System list are below
1. Solid State Eletronics
2. Signal Processing
3. System and Control Theory
4. Circuit theory
5. Simulation and Computing 
6. Electrical Machines
7. Power Systems
8. Electromagnetics

List the Merits and Demerits of Power Electronics:
Advantages:
1. Large efficiency due to low loss in power semiconductor devices.
2. High reliability of power electronic converter systems.
3. Long life and low maintenance due to the absence of any moving parts.
4. Small size and less weight result in less space.
5. Lower installation costs.

Disadvantage:
1. AC to DC and DC to AC converters operate at a low input power factor.
2. Power electronic controllers have low overload capacity.
3. Regeneration of power is difficult in a power electronic converter system.

Application of Power Electronics:
1. Battery Charger
2. Audio Amplifier
2. Alarm
4. Air Conditioning 
5. Blender 
6. Blower 
7. Blower 
8. Cement Kiln 
9. Dimmer 
10. Computer 
11. Conveyer
12. Electric Blanket
13. Electric Dryer
14. Electric Fan
15. Fan 
16. Flasher 
17. Food Mixer 
18. Furnace
19. Heat Control 
20. Light Demmer. etc