Author: misamaliraza94
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Full Wave Bridge Rectifier
The most common method used is the full wave bridge rectifier. This uses 4 diodes. The AC supply is connected between diodes 1 and 2, with the neutral between 3 and 4. The DC positive output is connected between diodes 2 and 3, and the negative between diodes 1 and 4. In the positive half…
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Full Wave Rectifier
We can create a full wave rectifier simply by using a centre tapped transformer and two diodes. A centre tapped transformer just has another wire on the secondary side, which is connected to the centre of the transformer coil, allowing us to use the full length of the transformer or just half of it. Because…
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Half Wave Rectifier
If we looked at an AC supply, with a step down transformer which reduces the voltage, the electrons are flowing forward and backwards. So, the load experiences a sine wave. The load could be anything from a resistor, a lamp, a motor etc. If we inserted a diode, the diode will only allow current to…
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Full Wave Bridge Rectifier
Learn about the full wave bridge rectifier, the half wave rectifier the full wave rectifier, center tapped transformers, diodes, load, oscilloscope, waveform, DC, AC, voltage current, capacitors, bleeder resistor to learn how full wave bridge rectifiers work. This is a full wave bridge rectifier. It’s used to power our electronic circuits, so we’re going to…
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Variable Frequency Drives
Learn the basics of Variable Frequency drives- how they work, why they are used and their importance along with worked examples. Scroll down to the bottom to watch the Youtube tutorial. Remember electricity is dangerous and can be fatal. You should be qualified and competent to carry out any electrical work. If you work in…
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How Inverters Work
How inverters work. In this article we take a look at how an inverter works to convert direct current (DC) into Alternating current (AC). Inverters are used within Photovoltaic arrays to provide AC power for use in homes and buildings. They are also integrated into Variable Frequency Drives (VFD) to achieve precise control of HVAC…
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Power Inverters Explained
Learn the basic working principle of power inverters, how they work, what they are used for, where we use them and their importance along with worked examples. Remember electricity is dangerous and can be fatal. You should be qualified and competent to carry out any electrical work. What Is An Inverter? A typical inverter looks…
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External and Internal Faults in Transformer
t is essential to protect high capacity transformers against external and internal electrical faults. External Faults in Power Transformer External Short Circuit of Power Transformer The short – circuit may occur in two or three phases of electrical power system. The level of fault current is always high enough. It depends upon the voltage which…
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SF6 Gas or Sulfur Hexafluoride Gas Properties
History of SF6 SF6 or sulfur hexafluoride gas molecules are combined by one sulfur and six fluorine atoms. This gas was first realized in the year 1900 in the laboratories of the Faculte de Pharmacie de, in Paris. In the year of 1937, General Electrical Company first realized that SF6 gas could be used as…
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Electrical Switchgear Protection
Definition of Switchgear A switchgear is a generic term which includes all the switching devices associated with power system protection. It also includes all devices associated with control, metering and regulating of electrical power systems. Assembly of such devices in a logical manner forms switchgear. In other words systems used for switching, controlling and protecting…