comment fabriquer un simple onduleur 2000W, onde sinusoidale, 12v to 220v, 16 mosfet

 comment fabriquer un simple onduleur 2000W, onde sinusoidale, 12v to 220v, 16 mosfet

Here is a home made 12 V / 220 V 2000 W Inverter completely professional capable of giving in output more than 1.500 Watts. I wanted to make something very nice so I decided that the construction will look very commercial and has the shape of a central unit of a computer. By the way, it looks very fantastic and I could even sell it.

The Home Made Inverter contains two parts. The first part is the logic part containing the microcontroller (PIC18F2550), this part is not mandatory but in order to control the battery level and the security of the system, I did it. When the battery level becomes too high or too low (Beyond the limit of the battery), a Relay switch off and cut the circuit off. Also if there is a short circuit anywhere in the circuit, the inverter will shut down automatically.

The power part is composed of 12 MOSFET IRF1405 giving the possibility of 1000 W easily if you have a good battery and a good transformer for sure. If you take a careful look at the pcb of the power part, you will see that the routing has been done symetricAlly because of the imperfections of the RDSON of the Mosfet. By doing this way, I eliminate all the parasites and bad electromagnetic waves and also the imperfection concerning the sharing of the current on each gate of each Mosfet.

I decided to create two separates board, one for the logic and one for the power, by this way we reduce a lot of the interference and the whole circuit will work a lot better. I used a big transformer in the output and a simple battery of 12V 7AH. I could use a most powerful battery but it is just for testing.

I included a charger inside my application, the microcontroller handle the end of the charge and break down the relay as well. I did not connect the charger for the moment, I will do it later.

I made a long video on YouTube explaining all the parts of the circuit (Logic part and power part) and how to build it on your own. You can check it directly and follow exactly every step. Please note that I have used printed circuit board for more professionalism but you can solder the component directly on a hole circuit.

Here are the diagrams of the logic part. I think it should be quite readable

The power supply is simply done with an LM317 to have 5 Volts regulated for the logic part, in reality, with the components on the diagram, we obtain about 4.9 Volts. The output voltage of the LM317 depends on R1LM and R2LM with the classic formula Vout = 1.25 * (1 + R2LM/R1LM). A capacitor bank around it stabilizes the voltage and limits unwanted variations.

The PIC18F2550 microcontroller is classic here and manages all the signals. Basically, I had used an AVR ATMEGA16 using Microchip Studio but the last one I had on hand no longer worked so I went through MikroC from Mikroelectronika with a PIC18F2550 (Code available later the time to update it own)

LEDs are present (LED_R and LED_V) to indicate the operating status of the inverter.

Flashing green LED: Startup

Green LED on: Normal state (Battery and charger)

Red LED flashing: Output voltage anomaly

Red LED on: Battery discharged

R3 and R4 are used to measure the battery voltage through the ADC of the PIC. Diode D2 is not necessary.

There is the terminal block for the 2*16 LCD as well as a 3-output terminal block for the potentiometer to adjust the contrast of the screen.

A push button to reset the assembly in the event of a fault and a buzzer controlled by a transistor to have a bit of melody.

The second diagram concerning the production of 220 V and begins with a switch (Switch) then attacks the terminals of a relay initially in open contact. A cd4047 generates the necessary pulses and the respective outputs 10 and 11 produce square signals each inverted with respect to the other and attack the mosfets. The 12V points of the transformer are connected to the two respective drains of the two stages and the middle point to the 12V battery.

The charger contains a diode bridge following a charge regulation circuit. It delivers about 4 A for a voltage between 12.4V and 15V. The diode bridge should be able to deliver no less than 4 A at 35 Volts. The 2N3055 transistor will need to be placed in a heatsink to properly dissipate heat.

The value of the current on the base of the transistor Q17 is limited which makes it possible to avoid an abnormally high current load.

The detection of the charger connection is done by the Signal_Charge using a voltage divider bridge. The analog voltage present is interpreted as a PIC logic level and activates an interrupt which interrupts the circuit and takes care of the load.

 comment fabriquer un simple onduleur 2000W, onde sinusoidale, 12v to 220v, 16 mosfet

Here is a home made 12 V / 220 V 2000 W Inverter completely professional capable of giving in output more than 1.500 Watts. I wanted to make something very nice so I decided that the construction will look very commercial and has the shape of a central unit of a computer. By the way, it looks very fantastic and I could even sell it.

The Home Made Inverter contains two parts. The first part is the logic part containing the microcontroller (PIC18F2550), this part is not mandatory but in order to control the battery level and the security of the system, I did it. When the battery level becomes too high or too low (Beyond the limit of the battery), a Relay switch off and cut the circuit off. Also if there is a short circuit anywhere in the circuit, the inverter will shut down automatically.

The power part is composed of 12 MOSFET IRF1405 giving the possibility of 1000 W easily if you have a good battery and a good transformer for sure. If you take a careful look at the pcb of the power part, you will see that the routing has been done symetricAlly because of the imperfections of the RDSON of the Mosfet. By doing this way, I eliminate all the parasites and bad electromagnetic waves and also the imperfection concerning the sharing of the current on each gate of each Mosfet.

I decided to create two separates board, one for the logic and one for the power, by this way we reduce a lot of the interference and the whole circuit will work a lot better. I used a big transformer in the output and a simple battery of 12V 7AH. I could use a most powerful battery but it is just for testing.

I included a charger inside my application, the microcontroller handle the end of the charge and break down the relay as well. I did not connect the charger for the moment, I will do it later.

I made a long video on YouTube explaining all the parts of the circuit (Logic part and power part) and how to build it on your own. You can check it directly and follow exactly every step. Please note that I have used printed circuit board for more professionalism but you can solder the component directly on a hole circuit.

Here are the diagrams of the logic part. I think it should be quite readable

The power supply is simply done with an LM317 to have 5 Volts regulated for the logic part, in reality, with the components on the diagram, we obtain about 4.9 Volts. The output voltage of the LM317 depends on R1LM and R2LM with the classic formula Vout = 1.25 * (1 + R2LM/R1LM). A capacitor bank around it stabilizes the voltage and limits unwanted variations.

The PIC18F2550 microcontroller is classic here and manages all the signals. Basically, I had used an AVR ATMEGA16 using Microchip Studio but the last one I had on hand no longer worked so I went through MikroC from Mikroelectronika with a PIC18F2550 (Code available later the time to update it own)

LEDs are present (LED_R and LED_V) to indicate the operating status of the inverter.

Flashing green LED: Startup

Green LED on: Normal state (Battery and charger)

Red LED flashing: Output voltage anomaly

Red LED on: Battery discharged

R3 and R4 are used to measure the battery voltage through the ADC of the PIC. Diode D2 is not necessary.

There is the terminal block for the 2*16 LCD as well as a 3-output terminal block for the potentiometer to adjust the contrast of the screen.

A push button to reset the assembly in the event of a fault and a buzzer controlled by a transistor to have a bit of melody.

The second diagram concerning the production of 220 V and begins with a switch (Switch) then attacks the terminals of a relay initially in open contact. A cd4047 generates the necessary pulses and the respective outputs 10 and 11 produce square signals each inverted with respect to the other and attack the mosfets. The 12V points of the transformer are connected to the two respective drains of the two stages and the middle point to the 12V battery.

The charger contains a diode bridge following a charge regulation circuit. It delivers about 4 A for a voltage between 12.4V and 15V. The diode bridge should be able to deliver no less than 4 A at 35 Volts. The 2N3055 transistor will need to be placed in a heatsink to properly dissipate heat.

The value of the current on the base of the transistor Q17 is limited which makes it possible to avoid an abnormally high current load.

The detection of the charger connection is done by the Signal_Charge using a voltage divider bridge. The analog voltage present is interpreted as a PIC logic level and activates an interrupt which interrupts the circuit and takes care of the load.