The Job of Power Inverters - Ganna Magazine Blog

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The Job of Power Inverters

When science teachers in school were presenting colourful models of charged electrons flowing through the conductor in one direction to produce electricity, they usually meant direct current.Direct current is adequate for a small source of power such as a flashlight that is just a simple connection of a switch, a lamp and a battery. However, when it comes to the appliances we use at home, the ball game changes. Alternating current is used to drive electrical appliances at home and this form of current switches back and forth rapidly to produce electricity. Power inverters are devices that convert DC supply to AC supply.Some of the best inverters for home use in India perform the simple task of conversion from DC to AC very efficiently.
About power inverters
  • The specifications regarding input voltage, output voltage, frequency, and power handling depends on the internal circuitry of the device selected. An inverter does not produce power independently; the power is supplied by the DC source.
  • When the output wave produced by a power inverter is a multiple step AC sinusoidal output, then it is called a sine wave inverter. Many sales people will mention the phrase ‘pure sine wave inverter’ to boost sales, but that is not possible. Pure sine wave inverters only produce a comparatively smoother output than square wave inverters and modified sine wave inverters.
  • This is beneficial as most electronics are designed to work best with a sine wave AC output source.
Applications of power inverters
  • Induction heating- Power inverters can convert the low frequency AC main power to higher frequency power. Inverter online shopping India can help in finding the correct device that will help in driving induction heaters. DC power is obtained by rectifying the low frequency AC power. The inverter then does the job of converting this DC power to high frequency AC power. Since the DC sources utilized have reduced, the output voltage has a higher resolution, and it results in a well-formed reference sinusoidal wave.
  • Uninterruptible power supplies (UPS)- These are used to provide an emergency power supply to the required load when the mains power supply fails. This device provides almost full protection from input supply interruptions. It usually provides the AC supply from reserved batteries, supercapacitors and flywheels. When the mains power is restored, a DC power supply is used to recharge the batteries.
  • Electric motor speed control–Motor speed controllers often make use of inverter circuits with a variable output range. The DC power can be extracted from any AC wall outlet. Since the final output of the inverter is used to control the speed of the motor under a mechanical load, a control and feedback circuitry is necessary to make adjustments. Motor speed control is essential for a wide variety of applications- industrial motor driven equipment, electric vehicles, power tools, and railway transport systems. As per patterns in the required switching table, switching states for positive, zero, and negative voltages are configured. This developed pattern is used as reference to generate the correct gate pulses and produce the required output.
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