Protection of life of your inverter battery is very important as it is so expensive, even about two times what it cost you to build an inverter. So designing and building an inverter without adequate measure to protect the life of the battery will make one lose greatly. This lead to introduction of a feature called 'low battery shutdown' into my power inverter circuit. This circuit protects your battery from danger of over-discharge. Battery level is measured through the voltage divider circuit of R17, R18 and VR2 which send measured voltage to IC1, a comparator. The voltage is processed by the comparator and output (0 or 1 as the case may be) R20, R21, D1, ZD2 and C5 filter out false signal that may fire the SCR1 to conduction. Once true signal is sent from the comparator, CSR1 conducts and send '1' to pin10 of IC2, SG3524 which disables the pulse generator circuit and the inverter as a whole.
It obvious that battery voltage will jump up when the system is shutdown by 'low battery shutdown' circuit, but the circuit will not honour this false rise in battery voltage as SCR1 continues to conduct and the inverter remains down until reset switch is pressed or you off and on the inverter again through the ON/OFF switch.
It obvious that battery voltage will jump up when the system is shutdown by 'low battery shutdown' circuit, but the circuit will not honour this false rise in battery voltage as SCR1 continues to conduct and the inverter remains down until reset switch is pressed or you off and on the inverter again through the ON/OFF switch.
Is there a suitable overload circuit that can be attached to pin 10 , to shut down oscillation once a set wattage is reached when a greater load is attached to the inverter ,and comes on when the load is detached.
ReplyDelete