This is a simple sine wave inverter circuit without programming.
Pure sine wave inverter circuit with no center tap design has become simple by using EGS002 Sinusoidal Inverter Driver Card. This post will give explain how to make a pure sine inverter at home without any programming. Let me start this tutorial by first introducing you to EGS002 DRIVER BOARD.
Build your own MPPT read here
EGS002 is an already made 17pins plug and play driver board specific for single phase sinusoidal inverter. It uses ASIC EG8010 as control chip and IR2110S as driver chip. The driver board integrates functions of voltage, current and temperature protection, LED warning indication and fan control. Jumper configures 50/60Hz AC output, soft start mode and dead time.
The driver board has an LCD monitor port. A connected LCD monitor will display Output voltage, current, system temperature and Output frequency. The board will still work even when no display is connected.
The board can be used for two stage AC converter (DC-DC-AC) or DC-AC single stage low power frequency transformer systems. In this tutorial, we are going to limit ourselves to Low frequency transformer systems. That is no center tap transformer inverter.
Lets now take a look at our EGS002 card and its pins. You can download the pdf. datasheet of the card by clicking here
EGS002 DISPLAY CONNECTION
The board has several functions which the user can activate or select by using
jumper or soldering the points together. The image below provides the jumper setting if the default is not wanted.
SINE WAVE INVERTER MOSFET BRIDGE BOARD
Now that you have fair idea of the sine inverter card, plug the card into the circuit below. the below circuit will work without any modification when using 12V or 24V battery system. To use 48V or higher Dc voltage designs, you have to step down the higher DC voltage to 12V using a buck converter or an appropriate Step down IC and later use 7805 to get your 5V.
Please note that LM7805 and LM7812 will burn when the input is more than 30V DC.
SINE WAVE INVERTER CIRCUIT
to make your own transformer for this circuit click below
Read more on make inverter transformer
With this circuit, you only fix your card pins to the corresponding circuit pins. Output regulation is achieved by adjusting the 10K variable resistor. U6 is 10K NTC for temperature sensing and fan regulation. The 220V ac output of this power inverter is protected from power surge using Power NTC 10ohms.
The egs002 card can be used for all voltage systems.
But 24 and 48V systems will need a voltage conveter.
YOU CAN READ ON HOW TO MAKE SMPS VOLTAGE CONVERTER BY CLICKING THIS TEXT
The feedback can also be achieved by using a separate 12V transformer instead of one transformer with a separate winding.
WATTAGE
The wattage of the inverter depends on the number of mosfets you will connect in parallel. Add more mosfets in parallel for high output power. Every 4 Mosfets will switch 250W in 12V system, 500W in 24V system and 1000w in 48V system. I hope you can make your calculation from it as to how many Fets to connect in parallel to get a certain wattage.
WHERE TO BUY THE SINE WAVE INVERTER DRIVER CARD
You can buy it on ebay or Ali express at 6 to 18 dollars with delivery time up to 40 working days.
You can also buy the BRIDGE BOARD from me by stating the wattage
Contact me on +233273315313 or opanin17@gmail.com
BATTERY PROTECTION AND LOW BATTERY ALARM
The inverter battery is very expensive and must be protected to prolong its life. when the battery is drained too low, the battery expected life will be shortened. connect the positive lines of my battery protection circuit to J1 and negative to the ground. Battery protection circuit can be seen by clicking this link
OVERLOAD PROTECTION FOR THE SINE WAVE INVERTER CARD
Overload protection protects the inverter from failing when the output is shorted or load exceeds maximum load. The sine wave driver board has an inbuilt current sense which shuts down the inverter when max current is exceeded. Pin 1 of the card is dedicated to this function. The current sense uses a shunt resistor. Shunt value is selected such that at maximum current, The voltage drop will be 0.5V. This prompts the system that there is an overload so that the system turns off until overload cause is removed.
The formulae for calculating the shunt resistance are:
1. R= 0.6 ( V/ I max) where V=0.5, I=Max DC switching current. and R = Shunt value.
read how to calculate max drive stage current from
Inverter repairs
http://manycircuits.blogspot.com/2017/05/inverter-circuit-with-charger.html
Pure sine wave inverter circuit with no center tap design has become simple by using EGS002 Sinusoidal Inverter Driver Card. This post will give explain how to make a pure sine inverter at home without any programming. Let me start this tutorial by first introducing you to EGS002 DRIVER BOARD.
EGS002 DRIVER BOARD/CARD
Build your own MPPT read here
EGS002 is an already made 17pins plug and play driver board specific for single phase sinusoidal inverter. It uses ASIC EG8010 as control chip and IR2110S as driver chip. The driver board integrates functions of voltage, current and temperature protection, LED warning indication and fan control. Jumper configures 50/60Hz AC output, soft start mode and dead time.
The driver board has an LCD monitor port. A connected LCD monitor will display Output voltage, current, system temperature and Output frequency. The board will still work even when no display is connected.
The board can be used for two stage AC converter (DC-DC-AC) or DC-AC single stage low power frequency transformer systems. In this tutorial, we are going to limit ourselves to Low frequency transformer systems. That is no center tap transformer inverter.
Lets now take a look at our EGS002 card and its pins. You can download the pdf. datasheet of the card by clicking here
EGS002 DISPLAY CONNECTION
The board has several functions which the user can activate or select by using
jumper or soldering the points together. The image below provides the jumper setting if the default is not wanted.
SINE WAVE INVERTER MOSFET BRIDGE BOARD
Now that you have fair idea of the sine inverter card, plug the card into the circuit below. the below circuit will work without any modification when using 12V or 24V battery system. To use 48V or higher Dc voltage designs, you have to step down the higher DC voltage to 12V using a buck converter or an appropriate Step down IC and later use 7805 to get your 5V.
Please note that LM7805 and LM7812 will burn when the input is more than 30V DC.
SINE WAVE INVERTER CIRCUIT
to make your own transformer for this circuit click below
Read more on make inverter transformer
With this circuit, you only fix your card pins to the corresponding circuit pins. Output regulation is achieved by adjusting the 10K variable resistor. U6 is 10K NTC for temperature sensing and fan regulation. The 220V ac output of this power inverter is protected from power surge using Power NTC 10ohms.
The egs002 card can be used for all voltage systems.
But 24 and 48V systems will need a voltage conveter.
YOU CAN READ ON HOW TO MAKE SMPS VOLTAGE CONVERTER BY CLICKING THIS TEXT
The feedback can also be achieved by using a separate 12V transformer instead of one transformer with a separate winding.
WATTAGE
The wattage of the inverter depends on the number of mosfets you will connect in parallel. Add more mosfets in parallel for high output power. Every 4 Mosfets will switch 250W in 12V system, 500W in 24V system and 1000w in 48V system. I hope you can make your calculation from it as to how many Fets to connect in parallel to get a certain wattage.
WHERE TO BUY THE SINE WAVE INVERTER DRIVER CARD
You can buy it on ebay or Ali express at 6 to 18 dollars with delivery time up to 40 working days.
You can also buy the BRIDGE BOARD from me by stating the wattage
Contact me on +233273315313 or opanin17@gmail.com
BATTERY PROTECTION AND LOW BATTERY ALARM
The inverter battery is very expensive and must be protected to prolong its life. when the battery is drained too low, the battery expected life will be shortened. connect the positive lines of my battery protection circuit to J1 and negative to the ground. Battery protection circuit can be seen by clicking this link
OVERLOAD PROTECTION FOR THE SINE WAVE INVERTER CARD
Overload protection protects the inverter from failing when the output is shorted or load exceeds maximum load. The sine wave driver board has an inbuilt current sense which shuts down the inverter when max current is exceeded. Pin 1 of the card is dedicated to this function. The current sense uses a shunt resistor. Shunt value is selected such that at maximum current, The voltage drop will be 0.5V. This prompts the system that there is an overload so that the system turns off until overload cause is removed.
The formulae for calculating the shunt resistance are:
1. R= 0.6 ( V/ I max) where V=0.5, I=Max DC switching current. and R = Shunt value.
read how to calculate max drive stage current from
Inverter repairs
http://manycircuits.blogspot.com/2017/05/inverter-circuit-with-charger.html
