A motor abnormality detection apparatus is capable of performing the abnormality
detection of a motor (5) without supplying a special electric current thereto
for abnormality detection in an ordinary control state. A motor control device
(100) controls the motor (5) through vector control which is described
by a two-phase rotating magnetic flux coordinate system having the direction of
a field current as a d-axis direction and a direction orthogonal to the d-axis
direction as a q-axis direction. A motor abnormality detection part (100h)
(100h) performs an abnormality determination of the motor based on
target impression voltages (Vd*, Vq*) impressed on the motor (5).
