Friends… Let me explain a little about the control working what I planned in mind (Not yet written program)
Point “A” is connected to switching transistor for Changeover relay (40A+ rating)
Pont “B” also the same for Charger On/Off relay (10A rating)
Point “C” is an input to controller giving measurement according to the load hooked on the output
Point “D” also an input to tell MCU the main’s presence.
Let us assume Input power supply is there and battery connected. The MCU will do the following:
- It will not energies the Changeover relay. So the input AC line supply will go to Output terminal through NC part of the relay.
- MCU will monitor the voltage level of connected battery. If the battery voltage fall down to desired level to start charging, the relay placed for charging will be energized. In this time the diodes inside each MOSFET will act as rectifier diodes to form DC charge for Charging the battery. MCU will take care of safe charging (Not to go OVERCARGING).
- Through the point “C” MCU will get the information about the load connected in the output. MCU will only take this information in mind when the Inverter is working. If It overloads, the inverter will stop working and produce warning beep.
- When the MCU lost signal about the presence of Input supply, immediately will turn off the charging relay if it is ON. Then turn ON the changeover relay and then start the inverter. So now the output load connected to inverter.
If the MCU got any signal through point “D” about input power presence, will wait a little to ensure the supply is stable, then the inverter will turn OFF and the changeover relay will de-energize to connect the output load to input AC.
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Mr Brian.... As you told, If I ignore the inductors used, the output will be a PWM. if I try to wipe out the 16kHz part, the wave will be a Sine wave. How can I achieve that? Capacitor? If so, If my plan is to use a transformer to carry 1000W load, what should be the value of that capacitor??... please explain on this...
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Mr Brian.... As you told, If I ignore the inductors used, the output will be a PWM. if I try to wipe out the 16kHz part, the wave will be a Sine wave. How can I achieve that? Capacitor? If so, If my plan is to use a transformer to carry 1000W load, what should be the value of that capacitor??... please explain on this...