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Posted by: nitikaarora
Original Content:Abstract : The late 19th century through the middle of the 20th century, DC to AC power conversion were accomplished using rotary converters or motor – generator sets. In the early 20th century, vaccum tubes and gas filled tubes begin to be used as switches in inverters circuits.
The most widely used type of tube was the thyratron. The origins of electro mechanical inverters explain the source of the term inverter.
An inverter is an electrical 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 .
An inverter is essentially the opposite of a rectifier. An uninterruptible power supply (UPS) uses batteries and an inverter to supply ac power when main power is not available.
When main power is restored, a rectifier is used to supply DC power to recharge the batteries. The circuit work based on the operation of the IC CD4047 it consists of two 555 timers in it. 12v AC is step up to 230v AC by using a step up transformer.
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