Seiko Epson Corporation

Tokyo R & D Co., Ltd.

Takeo Sato

Kunio Tabata

Kunihiko Takagi

Yoshikazu Koike

Minoru Kozaki

Issei Yamakoshi

Nobuki Sasaki

Atsushi Mizukoshi

An electric motor vehicle having a drive system comprises a controller including an inverter device. The inverter comprises first and second series of semiconductor switches which is arranged in parallel with a power source. When a key switch provided between the power source and the first series of the semiconductor switches is open in a stop mode of the vehicle, a signal is given to a control terminal of only the second series of the semiconductor switches to prevent a short circuit of a main battery.

Electric motor vehicle

An electric motor vehicle comprises as a drive system a battery, a motor, and a controller for controlling the rotation of the motor. The electric motor vehicle disposes an accelerator for controlling speed of the motor, a key switch for turning on or off the motor and the controller, a circuit for judging an opening/closing state of the accelerator when the key switch is turned on, and a circuit for preventing the rotation of the motor when the key switch is turned on with the accelerator open.

Growing community of inventors

Yokohama, Japan

Takeo Sato