The Use of Inverter, Description About Sine Wave Inverter

Connected to the 12V outlet in your car, truck, boat, RV or directly from a dedicated 12V battery, this Inverter efficiently and reliably powers a wide variety of household AC products, such as portable stereos, laptop computer, TVs, VCR, and other similar products.

The Inverter uses reliable solid state power electronics for years of safe, trouble-free operation and can be included the following automatic features to ensure safe and trouble-free operation:

• Low battery alarm

• Low voltage shutdown

• High voltage shutdown

• Overload shutdown

• Overheating shutdown

• Short circuit protection

• Maximum safety

Sine-wave Inverters

As explained earlier, most DC-AC inverters deliver a modified sine-wave output voltage, because they convert the incoming DC into AC by using MOSFET transistors as electronic switches. This gives very high conversion efficiency, but the alternating pulses. Output waveform is also relatively rich in harmonics. Some appliances are less than happy with such a supply waveform; however examples include light dimmers, variable speed drills, sewing machine speed controls and some laser printers. Because of this, inverter manufacturers do make a small number of models which are designed to deliver a pure sine wave output. Generally speaking these inverters use rather more complex circuitry than the modified sine-wave type, because it is hard to produce a pure sine-wave output while still converting the energy into AC efficiently.

As a result pure sine-wave inverters tend to be significantly more expensive, for the same output power rating.The most common type of pure sine-wave inverter operates by first converting the low voltage DC into high voltage DC, using a high frequency DC-DC converter. It then uses a high frequency PWM system to convert the high voltage DC into chopped AC, which is passed through an L-C low-pass filter to produce the final 50 Hz sine-wave output. This is like a high-voltage version of the single-bit digital to analog conversion process used in many CD players.