Power Electronics Inverters: Operations & Efficiency
Inverters play a crucial role in converting DC to AC power. They are essential in various applications where AC power is needed. This content explores single-phase and three-phase inverter circuits, their operations, output waveforms, THD calculation, and efficiency calculation. Learn about the working principles and factors affecting the performance of inverters.
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Presentation Transcript
Al-Mustansiriya University Faculty of Engineering Electrical Engineering Department Class : Forth Year Subject : Power Electronics Inverters By: Asst Lec. Mustafa Abbas Fadel Master of Science in Electrical Engineering (Power and Machines) 2
Inverter: An changes direct current (DC) to alternating current (AC). electronic device or circuitry that The frequency, and overall power handling depend on the design of the specific device or circuitry. input voltage, output voltage and The inverter does not produce any power; the power is provided by the DC source.
Type of inverter circuits There are two types of inverter circuits 1. Single Phase Inverters 2. Three Phase Inverters
Single Phase Inverter: Circuit diagram
Single Phase operation: -ve Circuit operation
Single Phase operation: +ve Circuit operation
Three Phase Inverter: Circuit Diagram
Three Phase Inverter: Output wave forms
THD Calculation: Output signal wave form
THD Calculation: The total harmonic distortion (THD) is the square root of the sum of the squares of the harmonic voltages divided by the fundamental voltage, which most be under 5% which is expectable for the current wave form :
Efficiency Calculation: The efficiency of the inverter can be found by divided the output power to the input power, ?????????? =???? ??? And it can also performed as a percentage ?????????? =???? ? 100% ???
HW. (1):Draw the circuit diagram of the single phase inverter feeds an inductive load and draw the output wave forms. HW.(2) : Draw the output wave forms for three phase inverter provides by input DC power supply of 12 V.
