Motor controller

摘要

A controller (1) for a brushless motor (4) that suppresses torque reduction resulting from the influence of motor inductance (L) and suppresses the generation of invalid current. A phase advancing angle calculator (35) calculates a delay angle (Õ) of phases of phase currents with respect to the phases of the phase voltage command and a phase advancing angle (¦) corresponding to the delay angle based on the function (Õ=tan -1 (É€¢L/R)) of the angular velocity (É) and the motor inductance (L) (and armature winding resistance R) of the brushless motor. An adder (36) adds the phase advancing angle to the rotation angle (¸) provided from the rotation angle calculator to generate the corrected rotation angle (¸'). The adder further provides the corrected rotation angle to a two-phase/three-phase converter (21).