inverter projectshbridge sinewave inverterinverterinverter circuitpure sine wave inverter circuitsine wave inverter circuit

Pic18f4550 pure sinewave inverter project

pic18f4550 pure sine wave inverter circuit

Samsonic Technologies and Consults is the company behind the inverter known as Sinus 2.1. By adhering to the components’ labels, you can easily assemble the inverter. From 12 volts to 24 volts of supply voltage are compatible with the board. An external power supply is required for 48v.

Setup of a 12V Inverter The following items should not be included when setting up a 12V inverter.

1k 2watt resistor, 15V Zener diode, TIP122 To complete the circuit, place jumper J1 and solder it on. IRF3205 is the most suitable MOSFET value for this design.

Setup of a 24V Inverter To set up a 24V inverter, jumper J1 and all other components must be soldered. Switch out the 1N4007 for a choke. The choke resistor should not exceed 22 ohms and 5 watts; a 10 ohm 5-watt choke is preferred. Heat sinks for the LM7805 and TIP122 should be installed correctly. IRF3207 or IRF4110 is the most suitable MOSFET values for voltages greater than 3 KVA. Take Note: For improved performance, use an optocoupler with similar properties or the FL817C. To avoid burning out, the 220k resistors should be rated at 2 watts. Unless otherwise noted, all other resistors on the inverter card are 14 watt.

Setup of the 48V Inverter An external SMPS (switch mode power supply) circuit is used to reduce the driver board’s 48V to 12V. There are no TIP122, 15V ZENER, 1K 2W resistor, or Jumper JP1 components. With a jumper, substitute 1N4007 D1. Interface the smps as named in the picture beneath. GND is the ground, IN is the input, and 12V is the output. The IF4110 MOSFET is the best choice.

Notes on Soldering When soldering, pay attention to the positions of important components like diodes, BD139 transistors, and BC547 transistors. The diodes ought to be positioned appropriately. The transistors’ positions and orientation are depicted in the diagram above, with BC547 bearing the labels C, B, E, and BD139 E, C, and B.

LCD CONNECTION The connection between the inverter board and a 16 x 2 line LCD is depicted in the diagram above.

The inverter must be connected to the temperature sensor. The inverter won’t work if the thermistor isn’t there. The thermistor has a 10k value. The heatsink (positive battery terminal) holds the thermistor in place. Temperature control is on the fan.

Power On and Operation The H-bridge is used to operate the inverter. Check to see that the control signal terminals are properly connected.

The inverter is turned on by pressing a button. The inverter resets itself when a fault occurs, and after the initialization process, it is ready for use once more. The inverter will be reset if the fault persists, and the user will be informed of the type of fault.

Two major operations are involved.

Backup Mode

Modifying Mode

Backup mode: in this mode the inverter isn’t providing yield. This mode is entered by the inverter when it is turned off. The inverter begins charging 20 seconds after utility power arrives. The inverter does not provide backup power if the mains power is lost until you press the push button to turn it on.

There is no waste of power in standby mode. The inverter is kept ready to charge even when you are not there. It handles the charging of the inverter and switches off the inverter when there is blackout.

Mode that Inverts: The inverter turns on and produces output when the push button is pressed once. The inverted mode is this. Additionally, it has a UPS feature that ensures that any connected appliances do not lose power in the event of a power outage.

CT Current Transformer/CONNECTIONS Make use of any kind of current transformer, including those with 5 amps. From point A on the board to point B, run a wire through the CT.

Connect the high-voltage sides of the transformers, TRANSFO_1 and TRANSFO_2, to one another. Connect Phase to the inverter’s output, and connect the board’s mains to mains.

SETUP BUTTON The buttons are used to set up the inverter and calibrate it. The buttons are connected to the board’s buttons 4 pin socket.

At any time, the inverter can enter calibration mode. However, entering the setup during inverting is recommended. Before connecting the charger, do this. The calibration can only be carried out with a multimeter.

To enter alignment mode, you hold down the alright/enter button.

You press the up button to change the value of a parameter.

By pressing the down button, a parameter value can be decreased.

To save boundary esteem, you press the alright/enter button.

The battcuf should be set as the first parameter.

The battery cutoff parameter is BATTCUTF. To prevent the battery from deteriorating, the inverter shuts down at this voltage.

Set the battcutf on the 12v system to 10v minimum.

The minimum voltage for the 24v system is 20v.

The minimum voltage for the 48v system is 40v.


This is the battery voltage setting to begin the low battery caution.

12v framework set to 11v

24v framework set to 22v

48v framework set to 44v


This is battery full settings. The setting is determined by the battery type used. Before changing this setting, please always read the battery’s manual. This battfull is set to 13.8 volts by default. Before setting up the inverter for the first time, make sure you carry this setup.

12v framework set to 13.8v

24v framework set to 27.6v

48v framework set to 55.2v


This boundary is the charging current. Try not to enter this mode in the event that you don’t have a clasp meter. Connect the clamp meter to the battery’s negative terminal. The charging current can be increased or decreased by pressing the up or down buttons.

To save the desired current, press the OK/enter button. Depending on the transformer that is being used, the default charging current is 3.6 amps. Set the charging current to 8-10 amps for a 12-volt system. The charging current on a 24-volt system is 10 amps.

CHARGCAL This parameter is used to align the charger with the clamp meter value. The charge can be increased or decreased by pressing the up or down buttons. To save, press the OK/enter button.

O/P The output voltage is set by this parameter. This is utilized to change the voltage of the inverter to the advantageous voltage of 230v. Connect a multimeter to the inverter’s output. Make sure the AC volts setting on the multimeter is set. The output voltage can be changed by using the up and down buttons. To save, press the OK button on the multimeter when the desired voltage is reached.

O/P CAL This parameter is used to adjust the inverter’s LCD voltage so that it matches the multimeter voltage.

I/P CAL is the parameter that is used to match the inverter’s LCD input voltage to the mains voltage. Associate the charge fitting to the mains, interface your multimeter, then, at that point, change the voltage until it coordinates with the voltage on the multimeter. To save, press the OK/enter button.

LOAD The purpose of this parameter is load calibration. Connect the inverter to a load with a known value. You can set the maximum load with the assistance of the ADC reading displayed on the LCD; take note of it.

MAXIMUM_LOAD The maximum load is set by this parameter. Additionally, it addresses the short circuit. Short out is 1.3 * greatest burden, the over-burden trip is 1.2 * most extreme burden. The maximum load is calculated by multiplying the value from the load setup by a factor.

>>>Click here to Download The Project file for free<<<

Daniel Esan

Practical Electronics and MicroElectronics PDF

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