WE CLAIM:
1. A car control device for performing motor car
selection control in a train including a plurality of motor
cars to reduce the number of motor cars to be operated, the
car control device comprising:
a driving force calculating unit to calculate driving force necessary for the train to travel;
an operating number calculating unit to determine the number of motor cars to be operated on the basis of the driving force; and
a driving force command calculating unit to calculate driving force commands to be given to the motor cars that operate depending on the number of motor cars to be operated, wherein
the driving force command calculating unit continuously changes the driving force commands when the number of motor cars to be operated changes.
2. The car control device according to claim 1, wherein when the number of motor cars to be operated changes, the driving force command calculating unit changes the driving force commands in such a manner that a period during which driving force commands for operation continuing motor cars change and a period during which driving force commands for operation continuing motor cars change are coincident with each other.
3. The car control device according to claim 1, wherein when the number of motor cars to be operated changes, the driving force command calculating unit changes the driving force commands in such a manner that a sum of a driving force command for operation continuing motor cars and a driving force command for operation stop motor cars is kept

at a constant value during a process in which both of the driving force commands change.
4. The car control device according to any one of claims
1 to 3, wherein determination on a speed of the train based on a threshold is performed, and the motor car selection control is performed when the speed is higher than the threshold.
5. The car control device according to claim 4, wherein in a rainy weather or when the train is in a rain mode, the motor car selection control is canceled.
6. The car control device according to claim 4, wherein when a driving wheel of the train is slipping, the motor car selection control is canceled.
7. The car control device according to any one of claims 1 to 6, further comprising:
a variable load command calculating unit to calculate a variable load command for each of the motor cars on the basis of detected variable loads of cars constituting the train; and
a torque command calculating unit to calculate torque commands in a plurality of patters including both of normal powering and motor car selection powering on the basis of the variable load commands.
8. A car control system comprising: a car control device
to perform motor car selection control in a train including
a plurality of motor cars to reduce the number of motor
cars to be operated; and a train information management
device to manage train information, wherein

the train information management device includes:
a driving force calculating unit to calculate driving force necessary for the train to travel; and
an operating number calculating unit to determine the 3 number of motor cars to be operated on the basis of the driving force,
the car control device includes:
a driving force command calculating unit to calculate driving force commands to be given to the motor cars that ) operate depending on the number of motor cars to be operated, and
the driving force command calculating unit continuously changes the driving force commands when the number of motor cars to be operated changes. 3