PURE SINE WAVE INVERTER

2. First off, what is an inverter? An inverter is a device that converts
DC or Direct Current power (the type of electricity stored in
batteries) into AC or Alternating Current power (the type of
power we use at home). With an inverter, the power stored in a 12
volt battery such as the kind used in a car/truck/RV or a battery
power pack can then be used to run devices and appliances that
would normally only operate while plugged into a wall outlet in
your home or business. With a battery and inverter combination
such as the Humless Sentinel you have the ability to operate tools
and other equipment away from a wall outlet.
There also different types of inverters available on the market
and that’s why the pure sine wave needs to be explained.
Depending on how an inverter converts power from DC to AC the
resulting electricity can vary between a simple andrough ‘square’
wave on one end, to a finer and smooth sine wave on the other.

5. 850VA Pure Sinewave Home UPS Inverter with Digital Display, Its a
Great Value for Money. Sizing - Suitable for PC, LCD, LED TV, FAN,
Light, Kitchen Mixer, RO water Purifier,etc. (Specification (a)Mains AC
Lower Voltage Limit : 100V+/- 5V in Inverter Mode / 180V+/- 5V in UPS
Mode (b)Mains AC Higher Voltage Limit : 280V+/- 10V in Inverter
Mode/ 260V+/- 5V in UPS Mode (c)Output Voltage at No Load : 220V +/-
7V AC (d)Output Wave Form at No Load : Pure Sine Wave (e)Home
UPS Output Frequency : 50+/-1.0Hz (f)Nominal Battery Voltage : 12V
(g)Low Battery Cut Off : 10.5+/- 0.2 V (h)Change over time Mains to
UPS and vice versa : < 10 msec (at mains low and High cut)

6. •Pure Sine Wave Output - Eliminates humming and heat generated when powering on tube-
lights and fans.
•LED Indications & Audio Alarms - Provides easy-to-read status of your power conditions,
Home UPS and battery.
•Home/Away Switch - Keeps your battery charged when you are away, and prevents
needless discharges.
•Intelligent Battery Charging - Microprocessor controlled, 3 stage regulated charging
ensures fastest recharging without decreasing battery life.
•Wide Input Voltage Window - Saves your battery power when you really need it, during
power cuts!
•UPS/Inverter Switch - Lets you to power your computer systems as well as lights, fans and
televisions.
•Charger Selector - User selectable battery charger helps prevent under and over charging,
extends battery life.
•Advanced Safety Features - Safeguards your Home-UPS and battery.
•Push-Button Circuit Breaker - Provides easy recovery from a overload condition while on
mains mode.
•Generator Compatibility - Allows you to recharge your battery while you are on generator
mode.

7. This is one of the question frequently asked by readers of this blog. Normally
people who decide to buy 600 VA inverter gets easily confused to choose between
this two VA ranges.
Though 850 VA inverters has many advantages like compatibility with high power
Kitchen mixers and ½ hp water pumps, 600 VA inverter is also has its own
advantages and some valid reasons to consider.
If you are going to use inverter for just powering up your laptop + 2 ceiling fans +
1tubelight, then a 600 VA inverter is enough for you. It is unnecessary to invest
your money in 850 VA inverter , which you are not going to utilize 100%.

8. Sine Wave Inverter allows the use of 230V electrical appliances from a car
battery or a solar battery. This circuit ca n obtain power both solar as well as
AC. When the solar is ON the battery charger circuit (diode 5148) is in
forward biased when battery get fully charged the circuit will becomes in
reverse bias which provide the isolation to the solar panel. Here we use a
30W 2.5A solar panel which is made up of polycrystalline for high efficiency.
Now when the solar energy get low the inverter will still go on with the
alternative current supply. Circuit is divided into two section first is
controlling section and other is MOSFET section.
It must therefore supply a voltage that corresponds to an rms of 230 Volts sine-wave
like household main supply or similar. Sine-wave voltages are not easy to generate.
The advantage of sine-wave voltages is the soft temporal rise of voltage and the
absence of harmonic oscillations, which cause unwanted counter forces on engines,
interferences on radio equipment and surge currents on condensers. . On the other
hand, square wave voltages can be generated very simply by switches, e.g. electronic
valves like mosfet transistors. In former times electromagnetically switches, which
operated like a door bell were used for this task. They were called "chopper cartridge"
and mastered frequencies up to 200 cycles per second. The efficiency of a square
wave inverter is higher than the appropriate sine wave inverter, due to its simplicity.

10. The resistor's function is to reduce the flow of electric current. This symbol is used to
indicate a resistor in circuit diagram, known as a schematic.
Resistance value is designated in units called the "Ohm." A 1000 Ohm resistor is typically shown
as 1K-Ohm (kilo Ohm), and 1000 K-Ohms is written as 1M-Ohm (mega ohm).There are two
classes of resistors; fixed resistors and the variable resistors. They are also classified according
to the material from which they are made. The typical resistor is made of either carbon film or
metal film. There are other types as well, but these are the most common.
The resistance value of the resistor is not the only thing to consider when selecting a resistor for
use in a circuit. The "tolerance" and the electric power ratings of the resistor are also important.
The tolerance of a resistor denotes how close it is to the actual rated resistance value. For
example, a ±5% tolerance would indicate a resistor that is within ±5% of the specified resistance
value. The maximum rated power of the resistor is specified in Watts. Power is calculated using
the square of the current (I2) x the resistance value (R) of the resistor. If the maximum rating of
the resistor is exceeded, it will become extremely hot and even burn. Resistors in electronic
circuits are typically rated 1/8W, 1/4W, and 1/2W. 1/8W is almost always used in signal circuit
applications.

11. A transformer is a static device that transfers electrical energy from
one circuit to another through inductively coupled conductors—the
transformer's coils. A varying current in the first or primary winding
creates a varying magnetic flux in the transformer's core and thus a
varying magnetic field through the secondary winding. This varying
magnetic field induces a varying electromotive force (EMF) or
"voltage" in the secondary winding. This effect is called mutual
induction.
If a load is connected to the secondary, an electric current will flow in
the secondary winding and electrical energy will be transferred from
the primary circuit through the transformer to the load. In an ideal
transformer, the induced voltage in the secondary winding (Vs) is in
proportion to the primary voltage (Vp), and is given by the ratio of the
number of turns in the secondary (Ns) to the number of turns in the
primary (Np) as follows: