Power inverters are electrical devices designed to convert direct current (DC) to alternating current (AC). DC is the power that is produced by batteries and solar panels while Ac is the standard power needed to run electrical equipment. A power inverter does the opposite of a rectifier and is used in places and situations where AC power is not available.
Power inverters produce one of three types of power wave signals. Each signal represents a quality of power output. The first set of inverters made which are now obsolete produced a Square Wave signal. Square Wave signals produced power that was not reliable or consistent.
The second wave signal is the Modified Square Wave also known as the Modified Sine Wave. Modified Square Wave Inverters are the most popular and produce efficient stable power that can run most standard electrical equipment.
Pure Sine Wave inverters produce the most reliable and consistent power wave signal. This makes them the most expensive to acquire. Some equipment that are sensitive such as rechargeable tools and medical equipment require Pure Sine Wave inverters.
Power inverters come in different shapes and capacities. The conventional models are small rectangular boxes with an attached wire and jack that can be plugged into the cigarette lighter port on the dash- board of a car. Some models have jumper cables that can be connected directly to battery terminals. The box would normally have about two outlets to plug in your electrical equipment.
You could use a power inverter in your car or boat to power devices such as laptops, video games consoles, a small television or DVD player. They also come in handy in emergencies when there is a power outage. They are also helpful sources of energy on camping trips, beaches and parks where conventional electricity is not available.
Power inverters can also be used in areas with unstable power supply. The inverter is connected to batteries and the main electrical source. When there is an electrical power supply the system is designed to charge the batteries to store power and when there is a power outage the inverter draws DC current from the battery and converts it to AC to power the home. The capacity of a power inverter would determine the type and number of devices it can be used to power. Models differ in wattage capacity and you need to be sure you a get an inverter that suits your needs. To calculate what the capacity you require you need to measure the wattage that your devices would draw and add another 50% to cover for spikes or peaks in the power draw. For example if you intend to power two devices each requiring 100 watts that would amount to 200 watts plus 50%. The recommended inverter you require should be a minimum of 300 watts.
The longer you use a power inverter the more energy is drawn from the battery. It is thus important to fully charge the battery and even to have a spare. The number and capacity of the devices you plug to the inverter also affects the rate of battery drain. The static stabilizer offers a reasonable improvement on slow servo controlled stabilizer as well as other static tap changing stabilizers. This technology does not cause di/dt problems as it does not switch the power path. The basic topology is with buck-boost transformer with high primary to secondary ratio for voltage correction of ± 25%. The control voltage is imposed on the primary of this buck-boost trans- former. The voltage regulation with help of buck and boost topology is achieved electronically without the step changes in voltage that occur when the system regulates. This task is accomplished through a feed- back and a control system implemented by using a microcontroller