Different Types of Waveforms Used to Power Microcomputers

In general, there are three kinds of wave forms that are used with the UPS systems for providing the continuous power supply to the microcomputers. They are square wave, quasi-sine wave pulse width modulated (PWM) stepped rectangular wave, and pure sine wave. The cheapest of these is the square wave systems and most expensive is the sine wave systems. 

Though it is the fact that the power supplied by the local utility is also of the sine wave type, but this certainly does not mean that you need to make use of the sine wave ups system for your personal computer. In fact, cheaper wave forms are better sources for transforming into smoother more ripple free DC power. This is because these square and quasi-sine waveforms have a good quality output voltage value and the output voltage is at maximum value for a longer duration than the sine waves. Another factor to take care of is the RMS output voltage and in terms of this, the pulse width modulation in wave forms and the additional filtering devices handles this voltage. Additionally, even though the square and quasi-sine waveforms make more noise, but the higher models come with the EMI filters on the input and output that gets you rid of any potential interference. Lastly, the transfer time on these waveform systems is faster as sine wave are created by first transforming it into the square wave or quasi-sine wave and after that into sine waveform. So, after taking into consideration all these factors, you must choose the right type of waveform with UPS system to power your personal computer, just as mini CFL UPS is used to power very small appliances such as CFLs and LED lights.