《电路》（英文版）7-2 Forced response to sinusoidal forcing functions

87-2 Forced response to sinusoidal forcing functions The forced response The steady state response R I The u((t) has been switched into the circuit at some remote L time in the past, and the natural response has died-out completely. The forced response(steady state response)must satisfy the differentialequation L +Ri=Vm cos at nn OL cos(at-tan √R2+a2L2 R)9 i lags Us by 9=tan -I OL OL--inductance reac tance(Q R

§7-2 Forced response to sinusoidal forcing functions The forced response = The steady state response The has been switched into the circuit at some remote time in the past, and the natural response has died-out completely. (t)  s The forced response(steady state response) must satisfy the differential equation. Ri V t dt di L + = m cos ( ) cos( tan ) 1 2 2 2 R L t R L V i t m    − − +  =   i t  s i L − −induc tance reac tance( ) V cos t  s = m  − + R i L R L i lags by s    1 tan− =