Honda Giken Kogyo Kabushiki Kaisha

Akishiro Takeuchi

Yuji Saito

Yoshinori Mita

Yasushi Kanai

Makoto Anazawa

Katsuyuki Kusano

A battery box is detachably supported below a floor panel at a central portion of an electric vehicle. Batteries are mounted in a rear portion of the battery box, and a control unit and a PDU are mounted in a front portion of the battery box. As a result, the positions of the control unit and the PDU are lowered, which can contribute to the lowering of the center of gravity of a vehicle, and power lines extending from the batteries via the control unit and the PDU to a road wheel driving motor can be disposed at shortest distances, whereby the lengths of the power lines can be suppressed to the minimum.

Electric vehicle with battery box arrangement

A synchronous motor control system controls a synchronous motor on an electric vehicle for propelling the electric vehicle in a propulsive mode or regenerating electric energy in a regenerative model. The synchronous motor control system has a rotational speed sensor for detecting a rotational speed of the synchronous motor, an accelerator for producing a torque command signal, and a driver connected between a battery on the electric vehicle and the synchronous motor for operating the synchronous motor in either the propulsive mode or the regenerative mode. A controller is responsive to the rotational speed detected by the rotational speed sensor and the torque command signal produced by the accelerator for controlling the driver to operate the synchronous motor in either the propulsive mode or the regenerative mode. The controller has maps for storing lead and lag values which are selectively readable to control the driver to operate the synchronous motor with a maximum efficiency based on two parameters of operation of the electric vehicle, namely, the rotational speed of the motor and the torque command from the accelerator.

Growing community of inventors

Wako, Japan

Akishiro Takeuchi