Honda Motor Co., Ltd.

Hisayoshi Takahashi

Kazunori Watanabe

Tetsu Sugiyama

Kota Kasaoka

Dai Saitoh

Shintaro Uchida

Kazuo Kotaka

Hideki Inoue

This resolver digital converterincludes a band pass processing unit that is disposed between a conversion unit and a multiplication unit and passes only a signal of a predetermined band through processing performed with a period that is shorter than the sampling period of an analog-to-digital converter and corrects the gains of digital signals before being input to the multiplication unit by using gain correction values that are set based on the maximum value and the minimum value of each one of digital signals passing through the band pass processing unit.

Resolver digital converter

Apparatus controlling a permanent magnet rotary electric machine. After the apparatus controls a current control portion, when a rotor of the machine rotates at a constant speed, to supply a predetermined current to an armature, the apparatus performs a dq vector control process by determining a predetermined temporarily set value as a magnetic pole position correction quantity while a d-axis current command value and a q-axis current command value in the dq vector control process performed on a dq coordinate system that has a d-axis extending in the direction of a magnetic field of the permanent magnet of the rotor and a q-axis extending in a direction perpendicular to the d-axis. Then, the apparatus obtains the magnetic pole position correction quantity based on a predetermined operation expression using the d-axis voltage command value and the q-axis voltage command value from the dq vector control process.

Apparatus for controlling permanent-magnet rotary electric machine

The object of the present invention is provide a drive control system of an electric vehicle that can prevent overshoot of the amount of slip. The drive control system of the electric vehicle includes: a motor to drive a driving wheel; a PDU; a number-of-revolution sensor that detects the number of revolutions of the motor; a grip number of revolutions calculating device for calculating the current grip number of revolutions of the motor; a motor power limiting value calculating portion and a conversion portion that determines the limiting torque value of the motor; and a driving torque determining portion that determines the driving torque of the motor.

Drive control system of an electric vehicle

The present invention employed a motor control device including: current sensors which detect currents in each phase of a three-phase motor; a coordinate conversion device which computes a d-axis actual current and a q-axis actual current in dq-coordinates from phase currents of three phases based on detection values of the current sensors; a voltage instruction computation device which computes a d-axis voltage instruction and a q-axis voltage instruction based on a deviation between a d-axis current instruction and the d-axis actual current and on a deviation between a q-axis current instruction and the q-axis actual current; a target phase current computation device which computes target phase currents for each phase from the d-axis current instruction and the q-axis current instruction; and a current difference computation device which computes, for each phase, a current difference between the phase current and the target phase current.

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Utsunomiya, Japan

Hisayoshi Takahashi