Patent ID: 7163072

Claim:
A vehicle drive control apparatus, comprising: a motor; a battery and an inverter having a direct current supplied from a battery, wherein the inverter converts the direct current into an alternating current and supplies the alternating current to the motor; and a controller that transmits a drive signal to the inverter so as to execute a weak field control, wherein: a stator of the motor includes a plurality of teeth, so as to protrude toward an inner side radial direction by a uniform pitch, and a slot between the teeth, a rotor of the motor is placed inside of the stator and includes a plurality of permanent magnets arranged in a plurality of portions in a circumferential direction and salient poles arranged between the permanent magnets, and an opening angle of the salient poles is set to correspond to a slot pitch of 1.5, and an opening angle of the permanent magnets is set to correspond to a slot pitch of 0.5, 1.5 or 2.5, so that a reluctance torque coefficient is set to be equal to or more than 40, the reluctance torque coefficient calculated by dividing a torque constant, the torque constant calculated by dividing a motor torque constant by current supplied to the motor by a counter-electromotive constant, the counter-electromotive constant calculated by dividing a maximum counter-electromotive voltage generated at a time when execution of the weak field control is not allowed by a maximum value of a motor rotation speed.