DSP Sine Wave UPS

A new micro-controller based digital sine wave inverter using DSP (Digital Signal Processor) with full bridge configuratoin topology MOSFET switches. This inverter is best suited for manufacturing for domestic applications as it is simple and easy. It consists only few components which are easily available, does not have any surface mount devices and with a single side PCB. There are no windlings which can possibly cause any error such as DC-CT or EE-16 transformers. Mounting of heat sink along with mosfets and soldering few components will complete this board. It consists of a LCD which will display all the parameters of the system and indicates any error during the functioning of the inverter. A low cost 16 character single line LCD will be a scrolling type, showing the status of the inverter such as batts voltage, main voltage and inverter output voltage, inverter standby on/off,charger on/off mains/solar charging and many more. It is very simple to handle and very easy to set the values in the menu driven set-up mode.

Features :

• LCS display for indicating various status of the system like inverter voltage,mains voltage, battery voltage, % of load,overload/short circuit status,battery low status, charger status etc.
• LCD based menu driven setup of various parameters like battery full charge voltage, battery low voltage,load condition, inverter output voltage, charging current etc.
• Protections against: overload, short circuit, battery deep discharge, battery over charge,mains overvoltage,reverse connection of phase in – phase out,reverse connection of phase and neutral of mains input. In all these error conditions will be shown in the LCD display.
• Priority solar charging facility: When solar charger is connected mains charger will be in stand-by and priority will be for solar charger.
• Delayed inverter cutoff for conditions like battery low,over load, short circuit etc. The system will automatically restart from cutoff after a few second buzzer beeps. the system will goto the permanent cutoff if the error condition exists even after 4 restart.