A vehicle drive device uses in-wheel motors to drive a vehicle and includes in-wheel motors that are provided in wheels of a vehicle and drive the wheels, a body side motor that is provided in a body of the vehicle and drives the wheels, and a controller that controls the in-wheel motors and the body side motor based on requested output power of a driver, in which the controller causes the body side motor to generate a driving force and the in-wheel motors not to generate driving forces when the requested output power of the driver is less than predetermined output power and the controller causes the body side motor and the in-wheel motors to generate driving forces when the requested output power of the driver is equal to or more than the predetermined output power.

A car control device includes a driving force calculating unit that calculates driving force necessary for a train to travel; an operating number calculating unit that determines the number of M cars to be operated on the basis of the driving force; and a driving force command calculating unit that calculates driving force commands to be given to the M cars that operate depending on the number of M cars to be operated, wherein the driving force command calculating unit continuously changes the driving force commands when the number of M cars to be operated changes.

A car control device includes a driving force calculating unit that calculates driving force necessary for a train to travel; an operating number calculating unit that determines the number of M cars to be operated on the basis of the driving force; and a driving force command calculating unit that calculates driving force commands to be given to the M cars that operate depending on the number of M cars to be operated, wherein the driving force command calculating unit continuously changes the driving force commands when the number of M cars to be operated changes.

It is an object of the present invention to provide a drive system including an induction generator comprising some primary windings that has a main winding and an auxiliary winding, the drive system being capable of supplying electric power required by an auxiliary inverter, even in a regenerative mode of operation in which only the auxiliary winding is energized. The maximum current value of a converter for power generating is set on the basis of the maximum output power of the auxiliary winding of the induction generator and the minimum voltage applied to the auxiliary winding unless a traction inverter is in a regenerative mode of operation, and the non-load current value of the induction generator is set such that the maximum current in the auxiliary winding under the situation of the traction inverter being in the regenerative mode of operation does not exceed the maximum current in the converter for power generating.

An electric assist system for an electric assist vehicle includes a crankshaft rotatable by human power of a rider applied to a pedal, an electric motor that generates an assist power that assists the human power of the rider, a controller that controls a magnitude of the assist power to be generated by the electric motor, and an acceleration sensor that outputs a signal in accordance with an acceleration in a traveling direction of the electric assist vehicle. The controller changes the magnitude of the assist power to be generated by the electric motor in accordance with a change in the acceleration that is associated with an operation of the rider rotating the pedal.

An electric assist system for an electric assist vehicle includes a crankshaft rotatable by human power of a rider applied to a pedal, an electric motor that generates an assist power that assists the human power of the rider, a controller that controls a magnitude of the assist power to be generated by the electric motor, and an acceleration sensor that outputs a signal in accordance with an acceleration in a traveling direction of the electric assist vehicle. The controller changes the magnitude of the assist power to be generated by the electric motor in accordance with a change in the acceleration that is associated with an operation of the rider rotating the pedal.

Provided is a control apparatus for an electric vehicle that can set a final torque instruction value without necessitating a repetition of a calculation. A control apparatus calculates a power limit value of each motor that is used when power is supplied to a plurality of motors, based on a power limit value of a power source, and calculates a torque instruction value of each motor based on the power limit value of each motor.

An electrical power conversion control device of an electric automotive vehicle is obtained which is small in size and inexpensive with lower electric current consumption. In the power conversion control device, insulating power sources are each connected to gate drive circuits to form respective pairs therebetween; electric power whose voltage is regulated as a constant voltage by way of a constant-voltage circuit is supplied from a low-voltage battery to a low-voltage side of an insulating communications circuit, and a high-voltage side of the insulating communications circuit is operated by an insulating power source being at least one insulating power source among the insulating power sources; and a signal of a voltage of a high-voltage battery is insulated from the high-voltage side of the insulating communications circuit and transmitted therefrom to the low-voltage side thereof.

A control device includes a limit value calculation unit that, when a rotary electric machine is driven as an electric motor, subtracts a power consumption value from a discharge power limit value of a power storage device to calculate an input limit value, and a control unit that, when the rotary electric machine is driven as an electric motor, controls the inverter so that a power consumption value of the rotary electric machine is equal to or less than the input limit value. In response to an abnormality occurring wherein a normal power consumption value cannot be achieved when the rotary electric machine is driven as an electric motor, the limit value calculation unit sets the power consumption value of the electrical device for calculating the input limit value on an upper limit side of a range in which the power consumption value takes when the electrical device is driven.

Provided is an AC electric motor control device capable of detecting, in an AC electric motor drive device, abnormal operation of an AC electric motor or abnormal operation due to, for example, a sudden change of a load without an erroneous operation regardless of the operational state of the AC electric motor. When driving a three-phase AC electric motor by an inverter, inside a controller, an electric motor constant is calculated using at least one of the current, voltage, and rotational speed of the electric motor and the variation of the constant value is analyzed, thereby detecting abnormal operation of the electric motor or abnormal operation of a load device connected to the electric motor. In order to analyze the constant, a variation to be determined to be abnormal is preset or an abnormal value is calculated in comparison with the accumulated values of past constant changes. Alternatively, only the variation of the constant calculated in the controller is extracted to detect abnormality.