Solved Examples on Single-Phase Inverters
Q. The single phase half bridge inverter has a resistive load of R=1.2ohms and the DC input voltage is 24V . Determine
- RMS output voltage at the fundamental frequency
- Output power
- Average thyristor current
- Peak thyristor current
Given that R= 1.2ohms , input voltage (Vs) = 24v
RMS output voltage at the fundamental frequency is V01 = (2Vs/pi)/√2
V01 = (2*24/pi)/√2
V01 =10.803v
Output power P0 = (V0rms)2/R
=(Vs/2)2/ R
=(24/2)2/1.2
=120
Average thyristor current = It1 = It2 = ([Vs/2R]*[T/2])/T
=([24/2*1.2]*[T/2])/T
=5 A
Peak thyristor current = It1 peak = It2 peak = (Vs/2*R)
=24/(2*1.2)
=10
Single Phase Inverter
The primary objective of a single phase inverter is to generate an AC output waveform that ideally replicates a sinusoidal pattern with minimal harmonic content. This sinusoidal waveform closely resembles the standard AC electricity supplied by utility grids. The importance of achieving a high-quality sinusoidal waveform cannot be overstated. It serves to mitigate harmonic distortion, ensuring the proper functioning of a wide array of loads, including sensitive electronic equipment and electric motors. By minimizing the harmonic content, single-phase inverters contribute to the overall stability and reliability of electrical systems. The ability to produce a clean sinusoidal waveform enables these inverters to meet the stringent requirements of modern electrical devices ultimately, facilitating the seamless integration of DC and AC power source. Some industrial applications of inverters are for adjustable-speed AC drives, induction heating, stand by air-craft power supplies, UPS for computers, HVDC transmission lines, etc.
Here in this article, we will discuss types of single phase inverters, and their essential parts, applications, advantages, and disadvantages. Single phase inverters are ideal for use in home appliances, power tools, office equipment, water pumping in agriculture, adjustable speed ac drives, induction heating, vehicles UPS, and grid connected applications.
Table of Content
- Single Phase Inverter
- Types
- Advantages
- Disadvantages
- Applications
- Solved Example
- FAQs