Hello everyone,
I found this circuit in an old inverter ,which i tried to re-trace the circuit.
Im confused at this circuit which i think is the a PI control loop.
I tried to simulate it in ltspice but getting some wierd results.
Firstly there is no DC gain present.Only when i give different AC values i see some difference in the output dutycycle.
I check a few books and tried to derieve the transfer function and the co-efficients.
Please correct me if i am wrong:
Kp = R2/R3 = 5.62
Ki = 1/(C1*R3) = 21276.5
Will the output be (Vout) = -(R2/R3 + (1/C1*C3)) *Vin??
Many thanks
AK
I found this circuit in an old inverter ,which i tried to re-trace the circuit.
Im confused at this circuit which i think is the a PI control loop.
I tried to simulate it in ltspice but getting some wierd results.
Firstly there is no DC gain present.Only when i give different AC values i see some difference in the output dutycycle.
I check a few books and tried to derieve the transfer function and the co-efficients.
Please correct me if i am wrong:
Kp = R2/R3 = 5.62
Ki = 1/(C1*R3) = 21276.5
Will the output be (Vout) = -(R2/R3 + (1/C1*C3)) *Vin??
Many thanks
AK
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