12/01/2017
KNOW YOUR POWER INVERTER!!
We need a Power Inverter to change the direct current to alternating current (AC) in order to utilize the power being generated in a home. In order to maximize energy output, it is important to select an inverter with the following characteristics:
1.High efficiency
2.Low standby losses
3.High surge capacity
4.Low harmonic distortion
There are 3 major types of power inverters - sine wave (or "true" sine wave), modified sine wave (actually a modified square wave), and square wave.
A SINE WAVE is what you get from your local utility company (NEPA) and (usually) from a generator. This is because it is generated by rotating AC machinery and sine waves are a natural product of rotating AC machinery.
This is the best waveform, as it is the shape of an (ideal) AC electrical signal from the wall. The highest-quality inverters produce a true sine wave output, which requires fairly expensive components in the inverter. The major advantage of a sine wave inverter is that all of the equipment which is sold on the market is designed for a sine wave. This guarantees that the equipment will work to its full specifications. Some appliances, such as motors and microwave ovens will only produce full output with sine wave power. Pure sine wave inverters are used to operate sensitive electronic devices that require high quality waveform with little harmonic distortion. In addition, they have high surge capacity which means they are able to exceed their rated wattage for a limited time. This enables power motors to start easily which can draw up to seven times their rated wattage during startup.
MODIFIED SINE WAVE (QUASI-SINE)
A modified sine wave inverter actually has a waveform more like a square wave, but with an extra step or so. A modified sine wave inverter will work fine with most equipment, although the efficiency or power will be reduced with some.
Motors, such as refrigerator motor, pumps, fans etc will use more power from the inverter due to lower efficiency. Most motors will use about 20% more power. This is because a fair percentage of a modified sine wave is in higher frequencies - that is, not 50 Hz - so the motors cannot use it. Some fluorescent lights will not operate quite as bright, and some may buzz or make annoying humming noises. These inverters are capable of operating a wide variety of loads; electronic and household items including but not limited to TV, VCR, and satellite receiver, computers, and printers.
A modified sine wave inverter is probably OK for equipment that uses switch-mode power supplies, but for something like a pre-1990s stereo system or an analog TV set, you'd probably have more noise in the signal you are viewing/listening to. And don't get the energy to power a scope/spectrum analyzer's AC plug off an inverter like this...you'd probably get inaccurate readings on the measurements.
SQUARE WAVE
Very few but the very cheapest inverters any more are square wave. A square wave inverter will run simple things like tools with universal motors with no problem - but not much else. These are seldom seen any more except in the very cheap or very old ones.
This is the least desirable output waveform type, a square wave is sort of a "flattened-out" version of a sine wave. Instead of the voltage smoothly increasing from the negative maximum to the positive maximum and back again, it shifts suddenly from negative to positive, stays there for half a cycle, and then jumps to full negative and stays there for half a cycle, then repeats. Cheaper inverters are designed to produce a square wave output primarily because the components required to do this are cheap.
Contact us today for your Pure Sine Wave Inverters at cost -effective prices!!!!
