| 摘要 |
PURPOSE:To allow high adhesion operation by operating a plurality of induction motor with the outputs from dedicated inverters and selecting a minimum value and a maximum value, respectively, for powering and braking from a plurality of rotational speed signals thereby preventing the idling quickly. CONSTITUTION:DC current is taken from a trolley wire 1 through a pantograph 2 and a plurality of reactors 31a-31i into inverters 33a-33i where the DC current is inverted into three-phase AC current for driving three-phase induction motors 350a-350i. Highest and lowest rotational speeds of each motor in (a)-(i) systems are selected by selectors 5a-5i and delivered to rotational speed selectors 80a-80i for own and other systems. Minimum or maximum rotational speed of each wheel is selected as the rotational speed of each motor, respectively, for powering or braking. This constitution runs an electric vehicle under micro-idling state to allow high adhesion operation and increases the expected adhesion coefficient of the entire train thus realizing high speed high acceleration/ deceleration operation. |
