4. (1) DCM之轉速N = (V - Ia*Ra)/Kψ= = (100-5*10)/0.1 = 500 RPM
(2) DCM之起動電流為 Ia0 = V/Ra = 100/10 = 10A
(2) DCM之起動電流為 Ia0 = V/Ra = 100/10 = 10A