Patent ID: 7271556

Claim:
A control method of a switched reluctance motor comprising: (a) sensing a d.c.-link voltage V dc and a phase current I ph ; (b) calculating a flux-linkage λ ph of an active phase from the sensed d.c.-link voltage V dc and the sensed phase current I ph ; (c) comparing the calculated flux-linkage λ ph with a reference flux-linkage λ r , the reference flux-linkage λ r related to a reference angle θ r which lies between angles corresponding to aligned rotor position and non-aligned rotor position in the motor; and (d) controlling a turn-off angle θ off of each active phase and a turn-on angle θ on of the next active phase, based on a timing at which the calculated flux-linkage λ ph becomes greater than the reference flux-linkage λ r .