John McSorley
Introduction
A single phase inverter circuit is supplied from a 250V DC source which also supplies and 8 Ohm resister in series with a 0.02H inductor. The inverter is configured to operate in quasi-square mode at 50Hz with a duty cycle of 0.6. Objectives

The main objectives of this report is to build and simulate a single phase inverter circuit with a a load consisting of a resistor and an inductor using the Pspice student software and using this software to obtain the load current and load voltage waveforms and also plot the RMS (Root Mean Squared) load current, the RMS diode current (D9), the RMS thyristor current (D14) and the mean power in the load based on the I2R calculation. Circuit Diagram

Figure 1: Single phase inverter schematic

Analysis
The waveform for the load voltage is 197V but shows a distorted square wave due to the load being inductive. The peak of the waveform slopes because the inductor is de-energizing and when the voltage passes 0V line and it takes 2ns to reach the zero line because the inductor takes a short time to become energized. The load current starts at 25A and because the load is inductive the current lags the voltage by 90 degrees. According to the Pspice program the RMS current through the diode (D14) is 0A which doesn’t seem correct. The RMS thyristor current starts at 25A and drops to 10A after 100ns and continues to operate at this current. The RMS load current begins at 25A and drops to 16A, this current is also DC. The power dissipated is 4.85kW and the beginning but then drops and varies between 2.1kW and 2.15kW after 100ns Results

Figure 2: Simulation graph
In Figure 2 shows:
* V(R1:1,L1:2) is the load voltage waveform
* I(R1) is the load current waveform
* RMS(I(D14) is the RMS diode current
* RMS(I(D9) is the RMS thyristor current
* RMS(I(R1) is the RMS load current
* RMS(I(R1) * RMS(I(R1) * 8 (resister value) is the mean...

...Design and Implementation of a SinglePhaseInverter Circuit
1
INTRODUCTION
1.1 Introduction
Inverters are used to produce constant or variable frequency AC output
from a DC source. These inverters can be used for AC applicatio n like
driving an induction motor. Such type of inverters in present world are
used largely in renewable energy systems to convert DC to AC, example is
a PV system where...

...Abstract:
In this paper, a new topology is proposed for three-phase to single-phase matrix converters, where more voltage levels are produced in the output in comparison with the conventional topologies. In addition, a new control method based on minimum error between the generated and the desired output voltages is proposed for three-phase to single-phase matrix converters. In the proposed control method,...

...current in only one direction.
RECTIFIER CIRCUITS
Rectifier circuits may be single-phase or multi-phase (three being the most common number of phases). Most low power rectifiers for domestic equipment are single-phase, but three-phase rectification is very important for industrial applications and for the transmission of energy as DC (HVDC).
Half-wave rectification
In half wave...

...is proposed in order to improve the
transient response and eliminate the steady-state
error in DVR response, respectively. The
proposed algorithm is applied to some
disturbances in load voltage caused by induction
motors starting, and a three-phase short circuit
fault. Also, the capability of the proposed DVR
has been tested to limit the Downstream fault
current. The current limitation will restore the
point of common coupling (PCC) (the bus to
which all feeders under...

...INTRODUCTION
Inverter is a circuit use to convert a D.C. power into A.C. power at a designed output voltage and frequency. This conversion can be achieved either by controlling ON and OFF devices [ eg. BJTs MOSFETs IGBTs, SITs, GTOs etc.] or by forced commutations thyristors, depending on application. The output frequency of an inverter is determined by the rate at which the semiconductor devices are switched ON and OFF by inverter control...

...I was acquainted with a lot of things which includes
a. Audio power amplifiers
b. The inverter system
c. Basic electronics
3.2 The Inverter System
The inverter system is an electronics device that converts direct current (DC) to alternating current (AC); the converted AC can be at any required voltage and frequency with the use of appropriate transformers, switching, and control circuits.
Solid-state inverters have no moving parts and...

...Chapter (9)
Single-Phase Motors
Introduction
As the name suggests, these motors are used on single-phase supply. Singlephase motors are the most familiar of all electric motors because they are
extensively used in home appliances, shops, offices etc. It is true that singlephase motors are less efficient substitute for 3-phase motors but 3-phase power
is normally not available except in large commercial...

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