15-09-2014, 02:17 PM
INVERTER
[attachment=67994]
INTRODUCTION
The process of converting DC into AC is known as inversion. The device which Performs this process is known as an INVERTER.
An inverter is used to produce an un-interrupted 220V AC or 110V AC (depending on the line voltage of the particular country) supply to the device connected as the load at the output socket. The inverter gives constant AC voltage at its output socket when the AC mains power supply is not available.
When the AC mains power supply is not available, an oscillator circuit inside the inverter produces a 50Hz MOS drive signal. This MOS drive signal will be amplified by the driver section and sent to the output section. MOSFETs or Transistors are used for the switching operation. These MOSFETs or Transistors are connected to the primary winding of the inverter transformer.
When these switching devices receive the MOS drive signal from the driver circuit, they start switching between ON & OFF states at a rate of 50 Hz. This switching action of the MOSFETs or Transistors cause a 50Hz current to the primary of the inverter transformer. This results in a 220V AC or 110V AC (depending on the winding ratio of the inverter transformer) at the secondary or the inverter transformer. This secondary voltage is made available at the output socket of the inverter by a changeover relay
PCB DIAGRAM
Resonance circuit or the oscillator circuit is known as the tank circuit. It is built up by using suitable power transistor and a combination of inductor and capacitor with resistors of required value. The resistor, capacitor, inductor, etc. Used for building up the oscillation are called the resonant element.The D.C. is fed to the ocillator from D.C source. The oscillator build up oscillation at the designed frequency at low voltage. The basic condition for producing damped oscillation by the tank circuit.
( R2 ) < [ 4L/C]
The low voltage A.C output from the oscillator is then fed to a step up transformer for raising the output A.C voltage at the required level
HOW DOES THIS CIRCUIT WORKS
This circuit have a push-pull transformer, with two Switching transistors, whose base feedback is collected from the transformer itself (self oscillating).
This one has output power of upto 25Watt stated at 12V, though we can see the output is coupled by a series capacitor/diode here. The transformer has 5 lines at input section. Central connector goes to +VE supply, through a L1 inductor coil. It absorbs the spikes due to the switching of transformer.
L1 should be 10mH to 100mH wit ferrite core. There two power stage pins, and two feedback goes to each of transistor’s collector, base. The initial base feeding is done by a 220 Ohm resistor to the base of any of the transistor, having a capacitor of 104(0.1uF) to the other transistor. This technology can be used for similar CFL lighting/ mobile charging etc applications which does rectify the input power to DC.
The most advantage of this circuit is that this circuit glows CFL even at huge battery discharge. Experiments show, Light stays till battery voltage goes down to 5V. It’s not safe to run appliances upto that discharge level, as that would lead ‘sulphation’ to the battery plates. Here is used D880 or 1351 transistor for a output of 18Watt, but similarly we can use 2N3055 transistor in this setup with a big transformer to make output of upto 100W.
ELEMENT DISCRIPTION
ZENER DIODE
A Zener Diode is an electronic component which can be used to make a very simple voltage regulator circuit. This circuit enables a fixed stable voltage to be taken from an unstable voltage source such as the battery bank of a renewable energy system which will fluctuate depending on the state of charge of the bank.
As the input voltage increases the current through the Zener diode increases but the voltage drop remains constant
a feature of zener diodes. Therefore since the current in the circuit has increased the voltage drop across the resistor increases by an amount equal to the difference between the input voltage and the zener voltage of the diode.
LIMITATIONS
If there is no power supply at all in an area, if the power in the battery is drained, then the Inverter will be of no use. Inverter can be used only for a few hours as otherwise the battery will be drained out. Battery maintenance is required. Some electronic goods like computer will get reset even if on an inverter, because there is a small disruption in power supply.
Not apllicable for above 25 Watt load
It is damage if given above the 12Volt input power supply
CONCLUSION
An inverter is used to produce an un-interrupted 220V AC (depending on the line voltage of the particular country) supply to the device connected as the load at the output socket. The inverter gives constant AC voltage at its output socket when the AC mains power supply is not available.
The 100 Watt inverter applicable for home application and light load
[attachment=67994]
INTRODUCTION
The process of converting DC into AC is known as inversion. The device which Performs this process is known as an INVERTER.
An inverter is used to produce an un-interrupted 220V AC or 110V AC (depending on the line voltage of the particular country) supply to the device connected as the load at the output socket. The inverter gives constant AC voltage at its output socket when the AC mains power supply is not available.
When the AC mains power supply is not available, an oscillator circuit inside the inverter produces a 50Hz MOS drive signal. This MOS drive signal will be amplified by the driver section and sent to the output section. MOSFETs or Transistors are used for the switching operation. These MOSFETs or Transistors are connected to the primary winding of the inverter transformer.
When these switching devices receive the MOS drive signal from the driver circuit, they start switching between ON & OFF states at a rate of 50 Hz. This switching action of the MOSFETs or Transistors cause a 50Hz current to the primary of the inverter transformer. This results in a 220V AC or 110V AC (depending on the winding ratio of the inverter transformer) at the secondary or the inverter transformer. This secondary voltage is made available at the output socket of the inverter by a changeover relay
PCB DIAGRAM
Resonance circuit or the oscillator circuit is known as the tank circuit. It is built up by using suitable power transistor and a combination of inductor and capacitor with resistors of required value. The resistor, capacitor, inductor, etc. Used for building up the oscillation are called the resonant element.The D.C. is fed to the ocillator from D.C source. The oscillator build up oscillation at the designed frequency at low voltage. The basic condition for producing damped oscillation by the tank circuit.
( R2 ) < [ 4L/C]
The low voltage A.C output from the oscillator is then fed to a step up transformer for raising the output A.C voltage at the required level
HOW DOES THIS CIRCUIT WORKS
This circuit have a push-pull transformer, with two Switching transistors, whose base feedback is collected from the transformer itself (self oscillating).
This one has output power of upto 25Watt stated at 12V, though we can see the output is coupled by a series capacitor/diode here. The transformer has 5 lines at input section. Central connector goes to +VE supply, through a L1 inductor coil. It absorbs the spikes due to the switching of transformer.
L1 should be 10mH to 100mH wit ferrite core. There two power stage pins, and two feedback goes to each of transistor’s collector, base. The initial base feeding is done by a 220 Ohm resistor to the base of any of the transistor, having a capacitor of 104(0.1uF) to the other transistor. This technology can be used for similar CFL lighting/ mobile charging etc applications which does rectify the input power to DC.
The most advantage of this circuit is that this circuit glows CFL even at huge battery discharge. Experiments show, Light stays till battery voltage goes down to 5V. It’s not safe to run appliances upto that discharge level, as that would lead ‘sulphation’ to the battery plates. Here is used D880 or 1351 transistor for a output of 18Watt, but similarly we can use 2N3055 transistor in this setup with a big transformer to make output of upto 100W.
ELEMENT DISCRIPTION
ZENER DIODE
A Zener Diode is an electronic component which can be used to make a very simple voltage regulator circuit. This circuit enables a fixed stable voltage to be taken from an unstable voltage source such as the battery bank of a renewable energy system which will fluctuate depending on the state of charge of the bank.
As the input voltage increases the current through the Zener diode increases but the voltage drop remains constant
a feature of zener diodes. Therefore since the current in the circuit has increased the voltage drop across the resistor increases by an amount equal to the difference between the input voltage and the zener voltage of the diode.
LIMITATIONS
If there is no power supply at all in an area, if the power in the battery is drained, then the Inverter will be of no use. Inverter can be used only for a few hours as otherwise the battery will be drained out. Battery maintenance is required. Some electronic goods like computer will get reset even if on an inverter, because there is a small disruption in power supply.
Not apllicable for above 25 Watt load
It is damage if given above the 12Volt input power supply
CONCLUSION
An inverter is used to produce an un-interrupted 220V AC (depending on the line voltage of the particular country) supply to the device connected as the load at the output socket. The inverter gives constant AC voltage at its output socket when the AC mains power supply is not available.
The 100 Watt inverter applicable for home application and light load