PIC16F72 Sine Wave Inverter

In this Article i’m going to introduce the PIC16F72 sine wave inverter circuit diagram and also the programming Hex code. So if you are searching in lot of website for the proper explanation and the designs of this ? Now you are in the right website post. Here you will get the complete ideas about this Pure sine wave inverter project.

Features and specifications

DC battery specifications	12v 180AH Lead acid
Inverter output voltage	230v AC (+2%)
Inverter Operating Frequency	50Hz ( similar to grid )
Inverter output wave form	Pure sine wave
Harmonic distortion	Less than 3%
Inverter efficiency	85% for the 12V system
Inverter protections	low battery shutdown overload shutdown output short circuit shutdown
Low battery indication	Beep start at 10.5v and the inverter shutdown at 10v DC remaining in battery
Overload protection	Beep starting at 120% Load
Led indications	Low battery Overload Charging Main on
Circuit spec	PIC16F72 microcontroller based circuit with H bridge inverter oparations.
Charging setup	Mosfet based PWM charge controller. 2 mode of charging boost mode & absorption mode.
DC fan	Fan installed for the internal cooling during the working.

Inverter Circuit Diagram

H Bridge Mosfet Section

Components Required

Low Battery Indication

During the grid current on state that means the main on time the charging will occurs if the voltage is less than 11 voltage. The battery charging system is working based on the SMPS topology. To charging the battery the mosfet and the inverter transformer working as a boosting converter. The main on time the mosfet is acting as like a diode.

The primary coil is acting as the inductor. while the mosfets gets on and off time the energy has to be stored and released from the primary coil. Then the AC voltage is rectified and it will get rectified inside the mosfet and the battery get charged.

Over Load Protection

The one of the important feature is overload protection. If their is no overload protection in the circuit it make big problems as like mosfet burning and inverter board damage. here the inverter gets shut down if the load is above 130% and also giving the alert in 120% load.