Most people have heard of power inverter, or inverter, this is an electronic device or circuitry that changes direct current to alternating current. The put in voltage, put out voltage and frequency, and overall power handling depend on the plan of the specific device.
LISTED BELOW ARE THE NECESSARY MATERIALS FOR THE CONSTRUCTION OF POWER INVERTER
These are component that is use to introduce a known amount of resistance into a circuit so as to limit the amount of current flowing through the circuit. Resistor is of two types, which are:
- Fixed resistor (i.e it has a fixed ohms resistance value).
- Variable resistor (i.e it ha s a varying value from zero to maximum).
A capacitor really consists of two conducting surfaces separated by a layer of an insulating medium called dielectric. The conducting surfaces may be in form of either circular or rectangular plates or spherical cylindrical shape. The purpose of a capacitor is to store electrical energy by by electrostatic stress in the dielectric.
The larger the capacitance of a capacitor, the larger the electric charge it can store. According to the Raja 1996, a capacitor is made up of two parallel plates separated by dielectric. Electrical charge flows into the plates and produce a voltage between the plates.
Diodes are two semi-conductor devices that allow current in one direction. Diodes are used as rectifiers, indicators and circuits protectors for the construction of power inverter. Examples of diode are zener diode, light emitting diode (LED) e.t.c
Transistors are semi-conductor device that show the property of amplification, whereby a small time varying voltage or current can be amplified to a large voltage or current that is the same of the smaller. All the types of transistors are used in a wide variety to amplify circuit, as stated by Green D.C (1886). Transistor is of two categories, which are;
- Bipolar Junction Transistor (BJT)
- Field Effect Transistor (FET)
It is further divided into Junction Field Effect Transistor (JFET) and Metal Oxide Semi Conductor Field Effect Transistor (MOSFET).
In the construction of inverter power MOSFETs are used as switching device at the inverter output section because the MOSFET transistors are better than common bipolar transistor. Currently, most UPS use MOSFET at its output section.
DIFFERENCE BETWEEN BIPOLAR TRANSISTOR AND MOSFET
- Communion bipolar transistor is current operated device, while MOSFET is a “voltage operated” device.
- The effect of temperature on MOSFET device is much less, while the effect of temperature on bipolar device is high.
- Efficiency of MOSFET device is higher at high frequency, while in bipolar the efficiency is low.
- The current flow increases in bipolar transistor circuit and its overall gain is reduced, while in MOSFET the current flow reduced and its overall gain is increases.
- Bipolar transistor demands higher drive power for its operation, while MOSFET device can work on very small drive power.
Transformer is a static machine that incorporates winding of coppers in ratio according to the percentage that is required for voltage step-up or step-down case. The copper wire use in transformer winding is of different gauges, depending on the power rating of the inverter and what it will be used for. Transformer is one of the major components of an inverter; it converts the battery supply into 230v supply.