A charge/discharge system includes: first and second electric chargers that supplies electric power to a motor generator and charges electric power generated by a motor generator; an electric power converter; and a controller. The controller controls the electric power converter such that electric power charged in the first electric charger is supplied to the motor generator, electric power charged in the second electric charger is charged in the first electric charger when a charging capacity of the first electric charger is lower than a second predetermined value. The driving force of the motor generator is reduced depending on the charging capacity when the charging capacity of the first electric charger is lower than the first predetermined value.

A charge/discharge system includes: first and second electric chargers that supplies electric power to a motor generator and charges electric power generated by a motor generator; an electric power converter; and a controller. The controller controls the electric power converter such that electric power charged in the first electric charger is supplied to the motor generator, electric power charged in the second electric charger is charged in the first electric charger when a charging capacity of the first electric charger is lower than a second predetermined value. The driving force of the motor generator is reduced depending on the charging capacity when the charging capacity of the first electric charger is lower than the first predetermined value.

A suspension characteristic is changed depending on a travel state by a simple structure. An ECU uses a vehicle speed-spring constant setting part to calculate a target spring constant depending on a vehicle speed, and uses a spring constant-frequency setting part to calculate a set frequency corresponding to the target spring constant. An oscillation input calculation part generates a signal representing an oscillation input oscillating at the set frequency. A superimposition part sets a value acquired by superimposing the oscillation input on a target driving force to a new target driving force. As a result, the wheel exhibits a minute oscillation in a longitudinal direction, resulting in an input of the minute oscillation to a suspension bush. The suspension bush changes in a spring constant and a damping coefficient depending on the frequency of the input minute oscillation. As a result, the suspension characteristic can be changed.

A suspension characteristic is changed depending on a travel state by a simple structure. An ECU uses a vehicle speed-spring constant setting part to calculate a target spring constant depending on a vehicle speed, and uses a spring constant-frequency setting part to calculate a set frequency corresponding to the target spring constant. An oscillation input calculation part generates a signal representing an oscillation input oscillating at the set frequency. A superimposition part sets a value acquired by superimposing the oscillation input on a target driving force to a new target driving force. As a result, the wheel exhibits a minute oscillation in a longitudinal direction, resulting in an input of the minute oscillation to a suspension bush. The suspension bush changes in a spring constant and a damping coefficient depending on the frequency of the input minute oscillation. As a result, the suspension characteristic can be changed.

An apparatus includes a multi-channel DC bus assembly comprising a first channel and a second channel, a first electromechanical device coupled to a positive DC link of the first channel, and a second electromechanical device coupled to a positive DC link of the second channel. A first DC-to-AC voltage inverter is coupled to the positive DC link of the first channel and a second DC-to-AC voltage inverter is coupled to the positive DC link of the second channel. The apparatus further includes a bi-directional voltage modification assembly coupled to the positive DC link of the second channel and a first energy storage system electrically coupled to the first electromechanical device.

An apparatus includes a multi-channel DC bus assembly comprising a first channel and a second channel, a first electromechanical device coupled to a positive DC link of the first channel, and a second electromechanical device coupled to a positive DC link of the second channel. A first DC-to-AC voltage inverter is coupled to the positive DC link of the first channel and a second DC-to-AC voltage inverter is coupled to the positive DC link of the second channel. The apparatus further includes a bi-directional voltage modification assembly coupled to the positive DC link of the second channel and a first energy storage system electrically coupled to the first electromechanical device.

A movement control device for a vehicle comprises a yaw-acceleration calculation portion to calculate a target yaw acceleration of the vehicle, a turn-back steering determination portion to determine whether a turn-back steering of the vehicle is conducted or not, and a drive-force control portion to a drive force of the vehicle. The control of the drive-force control portion is configured such that when the turn-back steering is not conducted, the amount of drive-force decreasing is increased with a specified increasing rate as the target yaw acceleration increases, the specified increasing rate becoming smaller as the target yaw acceleration increases, and when the turn-back steering is conducted, the drive force is increased in a case in which an absolute value of a steering angle of the vehicle decreases.

A movement control device for a vehicle comprises a yaw-acceleration calculation portion to calculate a target yaw acceleration of the vehicle, a turn-back steering determination portion to determine whether a turn-back steering of the vehicle is conducted or not, and a drive-force control portion to a drive force of the vehicle. The control of the drive-force control portion is configured such that when the turn-back steering is not conducted, the amount of drive-force decreasing is increased with a specified increasing rate as the target yaw acceleration increases, the specified increasing rate becoming smaller as the target yaw acceleration increases, and when the turn-back steering is conducted, the drive force is increased in a case in which an absolute value of a steering angle of the vehicle decreases.

A hybrid drive system has a battery and a combustion engine for energy sources. The system has a traction motor, a generator, a variable voltage converter (VVC), a motor inverter, a generator inverter, a bus coupling the VVC to the inverters, and a controller. The controller regulates engine speed, motor torque, and generator torque. The engine speed is determined according to a driver torque demand. In normal conditions, 1) the controller regulates the engine speed by modifying a generator torque command, and 2) the bus voltage is regulated using the VVC and battery. When the controller detects a fault in which the battery and VVC become unavailable for regulating the bus voltage, then the controller regulates a motor inverter power output to match a sum of a generator inverter power output and an estimated power loss of the inverters in order to regulate the bus voltage.

A technique controls regenerative braking to reduce skidding of a vehicle. Such a technique involves imparting rotation to an alternating current (AC) electric motor to move the vehicle to a first commanded vehicle speed; applying a regenerative braking power to the AC electric motor to bring the vehicle to a second commanded vehicle speed; while applying the regenerative braking power, adjusting the level of regenerative braking power applied to follow a predetermined speed reduction rate; while adjusting the level of regenerative braking power applied, provide a limit to the maximum level of regenerative braking power available; and while providing the limit to the maximum level of regenerative braking power available, adjusting the limit to the maximum level of regenerative braking power available based on a current speed of the vehicle.