It is an object of the present invention to provide a drive system for dump trucks that is capable of reducing the capacity of a converter that excites a two-winding induced generator and of performing output control according to the converter capacity. To achieve the object, the drive system includes an induced generator having a primary winding including a main winding and a sub-winding, a rectifier for converting an AC voltage generated across the main winding into a DC voltage, a propulsive machinery side load connected to the rectifier, a converter connected to the sub-winding for exciting a secondary winding of the induced generator and converting an AC voltage generated across the sub-winding into a DC voltage, an accessory side load connected to the converter, and a controller for controlling the converter, in which the controller controls a DC voltage of the accessory side load according to electric power required by the accessory side load and controls a DC voltage of the propulsive machinery side load according to electric power required by the propulsive machinery side load and a converter capacity that represents a current capacity of the converter.

It is an object of the present invention to provide a drive system for dump trucks that is capable of reducing the capacity of a converter that excites a two-winding induced generator and of performing output control according to the converter capacity. To achieve the object, the drive system includes an induced generator having a primary winding including a main winding and a sub-winding, a rectifier for converting an AC voltage generated across the main winding into a DC voltage, a propulsive machinery side load connected to the rectifier, a converter connected to the sub-winding for exciting a secondary winding of the induced generator and converting an AC voltage generated across the sub-winding into a DC voltage, an accessory side load connected to the converter, and a controller for controlling the converter, in which the controller controls a DC voltage of the accessory side load according to electric power required by the accessory side load and controls a DC voltage of the propulsive machinery side load according to electric power required by the propulsive machinery side load and a converter capacity that represents a current capacity of the converter.

A vehicle including a chassis and an engine connected to the chassis. The vehicle also includes an alternator connected to the engine and a drive system connected to the alternator. The vehicle also includes a number of wheel motors connected to the drive system and a number of wheels connected to the number of wheel motors. The vehicle also includes a battery connected to the number of wheel motors and to the alternator. The vehicle also includes a computer processor connected via a number of sensors to the engine, the alternator, the drive system, the number of wheel motors, the number of wheels, the battery, and to a data repository storing a routing plan for a number of vehicles including the vehicle. The computer processor is programmed to assign, according to a current charge in the battery, the vehicle to a route on the routing plan.

A powertrain, a control method, and a hybrid electric vehicle. The powertrain includes a motor controller unit and a motor. The motor controller unit includes N bridge arms, and the motor includes N motor windings corresponding to the N bridge arms. Each of the N bridge arms includes a first end and a second end, the first end of each bridge arm is connected to a positive bus, the second end of each bridge arm is connected to a negative bus, a midpoint of each bridge arm is connected to one end of one motor winding, the other end of each of the N motor windings is connected to one end of a power battery, and the other end of the power battery is connected to the positive bus or the negative bus.

Managing a vehicle body including computing an efficiency value of a monitoring target, the monitoring target being the power train or a part or a subsystem of the power train, on the basis of information about the vehicle body, the information being sensed by a sensor provided to the vehicle body. An output terminal that outputs the efficiency value of the monitoring target. Determining whether a load parameter is larger than a load determination value set in advance, and computing the efficiency value of the monitoring target on the basis of input energy and output energy of the monitoring target on condition that the load parameter be larger than the load determination value, and recording the computed efficiency value of the monitoring target.

Managing a vehicle body including computing an efficiency value of a monitoring target, the monitoring target being the power train or a part or a subsystem of the power train, on the basis of information about the vehicle body, the information being sensed by a sensor provided to the vehicle body. An output terminal that outputs the efficiency value of the monitoring target. Determining whether a load parameter is larger than a load determination value set in advance, and computing the efficiency value of the monitoring target on the basis of input energy and output energy of the monitoring target on condition that the load parameter be larger than the load determination value, and recording the computed efficiency value of the monitoring target.

A work vehicle including: a front wheel; a rear travel device; a travel body supported by the front wheel and the rear travel device; a driving section provided in the travel body and having an occupant floor section; a transmission configured to output power to the rear travel device; a transmission case housing the transmission; an electric motor coupled to the transmission; and an inverter connected to the electric motor, wherein: the inverter is provided between the front wheel and the rear travel device, under the floor section, and laterally of the transmission case.

A work vehicle including: a front wheel; a rear travel device; a travel body supported by the front wheel and the rear travel device; a driving section provided in the travel body and having an occupant floor section; a transmission configured to output power to the rear travel device; a transmission case housing the transmission; an electric motor coupled to the transmission; and an inverter connected to the electric motor, wherein: the inverter is provided between the front wheel and the rear travel device, under the floor section, and laterally of the transmission case.

A vehicle system includes a powertrain system including one or more electrical loads and prime mover configured to drive one or mechanical loads. A power converter is configured to power the one or more electrical loads via a main output and an auxiliary output The power converter includes a rectifier configured to power the main output and including a plurality of switching devices, an inductive-capacitive network operatively coupled with the plurality of switching devices and configured recover energy of electrical transients result resulting from operation of the plurality of switching devices, and a capacitive reservoir configured to store energy recovered by the inductive-capacitive network and power a DC/DC converter with said energy, the DC/DC converter being operatively coupled with the auxiliary output.

A motor control device that controls driving of a first inverter and a second inverter each configured to control a supply current to a three-phase alternating-current motor. The motor control device is configured to: switch a control mode between a single-inverter control mode in which one of the first inverter and the second inverter is driven to control the supply current to the motor, and a twin-inverter control mode in which both the first inverter and the second inverter are driven to control the supply current to the motor; calculate each of a first power loss due to the single-inverter control mode and a second power loss due to the twin-inverter control mode; and set the control mode to the first power loss or the second power loss, whichever has a smaller power loss.