What is the difference between a Quasi-Sinewave Inverter and a Pure Sinewave Inverter …?
The main difference between the two types of inverters is the shape and form of the voltage wave form. The quasi inverter has a variable mark-space ratio square wave. The sinewave inverter as it’s name suggests, a wave form approximating to a sine wave similar to normal household mains voltage. The main disadvantage of the quasi-wave inverter is the wave form, as it has sharp rising wave form this can be reflected as noise on hi-fi systems, on televisions it causes a noise bar on the screen, when used with microwave ovens it increases the cooking time required to perform the same task as a pure sine wave inverter and last but by no means the least; any equipment which has a variable speed control incorporated will not function correctly. The main advantage is that they are generally cheaper than the sine wave equivalent and if they are intended for use with resistive types of load e.g. lighting and heating or standard types of electric power tools they would be a cost effective answer.
