Abstract
In order to spread electric vehicles, those low-pricing and high efficiency are indispensable. DC motors are budget prices compared with AC motor, and their control device are also simple. However, the efficiency of DC motors is inferior to which of AC motors. In this study, a DC motor and a CVT are combined. CVT (Continuously Variable Transmission) has the feature that arbitrary gear ratios can be produced continuously. The purpose of this study is to control the gear ratio of CVT to drive the motor in the state with efficient at all times according to operation of environment and a driver.
