Other

Minoru Kaminaga

Hiroyuki Yamada

Kaname Sasaki

Takuma Nomura

Nobuyoshi Takahashi

Kazuhito Ishida

Kenichi Maehara

The present invention aims to provide an electric vehicle which provides good usability for a user and is economical and to provide a control device for an electric vehicle, which is high in reliability. An AC motor is used as a motor for driving running or driving wheels, and DC motors are respectively used as a steering auxiliary motor and a motor for driving a forklift device. Further, in order to achieve the above aim, an inverter circuit and chopper circuits are connected in parallel with a battery, and an electrolytic capacitor is connected in parallel with the inverter circuit, whereas an electrolytic capacitor is connected in parallel with the chopper circuit.

Electric vehicle and control device thereof

The electric car controller is characterized in that evaluation two-phase/three-phase converting means ( ) for calculating a three-phase evaluation current indication value is provided in control means, and current detected value from current detecting means ( ) and evaluation current indication value are compared with each other by a deviation computing means ( ). This result is evaluated by error evaluation means ( ), and is sent to target command computing means ( ), whereby the operation of a drive apparatus is stopped or continued.

Electric car controller and control method

Problems of a dead-time due to a make-contact delay time until the closure of the regeneration contactor and a drop of torque occurring in the prior art controller for an electric vehicle are solved by the invention, thereby providing an improved drive feeling during transition from its regenerating braking to plugging braking. Specifically, a regeneration contactor's contact voltage is entered to the arithmetic unit, upon set-up of a condition for stopping the regenerating braking, the control for closing the regeneration contactor is executed, and immediately upon detection of the actual closure thereof, the switching operation is cut off at a timing faster than the switching cycle thereby allowing for the transition to the plugging braking to be enabled.

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Hitachinaka, Japan

Minoru Kaminaga