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Saturday, September 1, 2018

Power Electronics


What is Power Electronics?

Power electronics is a part of electrical engineering that includes control, conditioning and transformation of electric power using semiconductor devices like; FETs, SiC, GaN and passive components like; resistors, inductors and capacitors. Semiconductor devices used for switching and control. Passive components used for sensing and filtering. 
                                                                                                                                                                                            In other words we can say that, power electronics is the use of solid-state electronic components like; transistor, diodes, integrated circuits, etc. to the control and conversion of electric power.

An assembled electronic circuit
An assembled electronic circuit

Difference between Electronics and Power Electronics

Purpose of Electronics is to handle data signals by the means of amplifier, oscillator, filters, audio & video transmitters and receivers etc. We can also say that it deals with signal processing instead of power conversion. Here transistor works in active region.
                           Though in Power Electronics, the attention is more on productive use of electrical power. This system uses converters like; rectifiers and inverters to control load operation by providing proper voltage and current. Here transistor works in cut-off or saturation region.

Importance of Power Electronics

Power Electronics is important because different types of systems require different types of power. For example, your average microcontroller would require about 3.3V of DC voltage but your mains would supply only voltage 230V, 50Hz AC. In these cases, you would need a converter or rectifier to rectify the mains to a DC voltage.
                                                                                                                                                     Power Electronics use is in high voltage applications, such as connecting two power systems of a different frequency.
                                                                                                                              Power Electronics is completely essential to incorporate renewable energy with power systems. It is required to connect renewable energy sources to conventional power grids because such energy sources like solar cells and wind turbines do not produce electric power that is well-suited with today’s power grids.

Power Electronics Applications

Power Electronics applications varies from high power conversion equipment such as dc power transmission to daily appliances, such as wireless screwdrivers, power supplies for computer systems, mobile phone chargers, lighting systems and electric vehicles.
                                      Power electronics can process milliwatts or Megawatts applications easily Usual applications of power electronics contains conversion of AC to DC, conversion of DC to AC, transformation of an unregulated DC voltage to a regulated DC voltage and transformation of an AC power source from one amplitude and frequency to a different amplitude and frequency.
                                         Power electronics includes applications of circuit theory, control theory, electronics, electromagnetics, microprocessors or microcontrollers (for control) and heat transfer.

Conclusion

Power Electronics progresses in its every application field. The main reason behind this is advancement of semiconductor switching components, filter components, controlling components, ferrite materials and other electronic components. These developments improve the efficiency and performances of electrical and electronic devices and have made power electronics a significant and fast-growing area in electrical and electronics engineering.

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Author & Editor

Hi, welcome to my blog, “Power Electronics Talks”.

I am Alok Pandey, an Electronics Engineer. I am passionate about Power Electronics and latest Technology. By profession I am design and application engineer and play with circuits.

Here at Power Electronics Talks, I write about all the stuffs related to Power Electronics. To share my knowledge I hold the hand of my blog, "www.powerelectronicstalks.com", where I can share all the technical details of Power Electronics and latest technical trends.

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