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Pure Sine Wave VS Modified Sine Wave
Pure sine wave - this gives a true wave form with curved peaks and troughs. This is very similar to grid electrical wave forms and provides a cleaner, smoother power delivery.
Modified sine wave - a squared off wave form, with small gaps in between waves gives a lower (but still very usable) quality of electricity.
A pure sine wave form is the best, it will work on all kinds of electronics, the only real drawback is the cost of the unit. However, this doesn't mean that modified sine wave inverters are useless, on the contrary, the modified sine wave's lower cost and wide range of applications still make them a popular choice. (albeit without as wide of a range of applications as the pure sine wave).
Pure sine wave inverters are suitable for anything that can be run through an inverter, the only choice then is the size of the inverter.
For modified sine wave inverters, it's not recommended to run inductive loads, sensitive electronics, digital clocks, products which rely on sensitive digital temperature calibration, medical equipment or compressors.
Some of these items may run okay, if the power of the component is not near the limit of the inverter but there may be either an audible humming sound (caused by "noise/interference") and/or a decrease in performance of the product. Efficiencies can drop by around 20% with some items. E.G. Lower power output from a microwave.
What's the physical difference?
Now we've covered all of the electrical differences and what they mean. There are a few practical differences within our range of inverters, mainly at the 1000w level, which is by far the most popular size in both modified sine wave and pure sine wave.
The modified sine wave unit it lower, and wider, giving it the space for 2 x uk 240v plug outlets on the front. The pure sine wave unit is narrower and taller, meaning we only have space for 1 uk 240v plug outlet on the front. Although this shouldn't determine which inverter is best for you, it does play a role in the "future proofing" concept of the pure sine wave inverter.
Power supply for home appliances
Modified sine wave inverter can be used for power supply of various home appliances such as ice box, microwave furnace and air conditioner.
For electric tools and equipment power supply
Modified sine wave inverter available for work site or remote area tools and other equipment (such as iron and steel hammer and grinder) power supply.
Charging for electronic devices
Modified sine wave inverter can be used for charging electronic devices such as intelligent hand machines, notebook computers, flat plate computers. However, please be careful when using a modified sine wave inverter, which may lead to some equipment slow charging or illegal charging.
Emergency power supply
Modified sine wave reverse converter possible power failure or other emergency emergency power supply.
Vehicle heating and cooling
Modified sine wave inverter is commonly used for automotive heating and cooling equipment, powering lighting, electric furnaces and other electric and electronic equipment.
Marine and maritime
Universally used modified sine wave inverter for electronic equipment supply on ships. Due to the weather conditions in the ocean, this is a high-grade modified sine wave inverter for ships that meet the requirements of ships.
Modified sine wave inverters are a cost effective choice to run appliances and equipment that is less sensitive to power fluctuations, such as lights and some tools. Modified sine wave inverters simulate ac power inverted from dc batteries.
7 precaution tips for modified sine wave power inverter
Do not plug small appliances into the inverter ac receptacles to directly recharge their nickel-cadmium batteries. Always use the recharger provided with that appliance.
Do not plug in battery chargers for cordless power tools if the charger carries a warning that dangerous voltages are present at the battery terminals.
Not all fluorescent lamps operate properly with a modified sine wave inverter. If the bulb appears to be too bright, or fails to light, do not use the lamp with the inverter.
Some fans with synchronous motors may slightly increase in speed (rpm) when powered by a modified sine wave inverter. This is not harmful to the fan or to the inverter.
Certain rechargers for small nickel-cadmium batteries can be damaged if plugged into a modified sine wave inverter. In particular, two types of appliances are susceptible to damage: Small, battery-operated appliances such as flashlights, cordless razors and toothbrushes that can be plugged directly into an ac receptacle to recharge. Certain battery chargers for battery packs that are used in some cordless hand-tools. Chargers for these tools have a warning label stating that dangerous voltages are present at the battery terminals.
Do not use a modified sine wave inverter with the above two types of equipment.
The majority of portable appliances do not have this problem. Most portable appliances use separate transformers or chargers that plug into ac receptacles to supply a low-voltage dc or ac output to the appliance. If the appliance label states that the charger or adapter produces a low-voltage dc or ac output (30 volts or less), there should be no problem powering that charger or adapter.
The working principle of the modified sine wave inverter is to convert the dc power of the battery or other dc power source into ac power that can be used to power electrical appliances and other electronic equipment. The waveform generated by the modified sine wave inverter consists of a series of stepped square waves, designed to mimic the shape of a sine wave.
While the waveform produced by a modified sine wave inverter is not as smooth and consistent as a pure sine wave, it is still suitable for powering many types of electronic equipment, including most household appliances, power tools, and consumer electronics. But there are some devices (such as medical equipment, audio equipment, etc.) that may not work properly or be damaged by square waves, so it is very important to check the equipment specifications and choose the right type of inverter.
Requirements
When selecting a suitable modified sine wave inverter, the demand consideration is a minor factor.
Certain efficiency requirements
First, certain demand use reverse converter power supply equipment and its efficiency requirements (mainly unit).
Consideration of waste efficiency rate
Some small equipment, such as electric tools and electric appliances, demand waste efficiency rate when working.
Compatibility
Guaranteed compatibility with demand and supply equipment for reverse converters. For example, medical equipment or a certain type of electric motor, possible and modified sine wave inverter are incompatible.
Consideration efficiency
Highly efficient and efficient reverse converter with less cost during the conversion process. Long-term use, highly effective reversing, saving more electricity.
Consideration and portability
As a result, it is a portable reverse converter that can be used when traveling, and is lightweight and easy to carry.
Selected good reputation brand
Selected good reputation brand reverse conversion, offer maintenance and good customer support. High-quality reverse converter can be replaced early, but it will be available for a long time, but it will provide better performance and longer service life, so you can save money.
By considering these factors, you can choose a modified sine wave inverter that meets your power requirements, is compatible with your equipment, and provides reliable performance.
Pure sine wave (psw) inverter
A psw inverter is a type of modified sine wave inverter that produces a waveform that is closer to a true sine wave. This means that it generates cleaner power and works better with sensitive electronics.
Quasi sine wave (qsw) inverter
A qsw inverter is another type of modified sine wave inverter that produces a waveform that is a little closer to a true sine wave than a standard modified sine wave inverter. It is a good compromise between cost and performance.
Modified square wave inverter
This type of inverter is a little more complex than a square wave inverter and produces a waveform that is better suited for running more complex equipment.
Stepped sine wave inverter
This is a new type of inverter that produces a stepped waveform that is similar to a true sine wave. It is considered to be the most efficient type of modified sine wave inverter.
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