A motor unit including: a first motor that drives a vehicle; a second motor that drives an auxiliary machine of the first motor; a first inverter that controls the first motor in response to a control signal transmitted from a main control device of the vehicle; and a second inverter that controls the second motor in response to a drive command signal for controlling the second motor transmitted from the first inverter, in which the second inverter transitions to an operation state of suppressing power consumption of the second inverter when reception of the drive command signal is finished.

A vehicle includes a fuel cell having an air inlet port and an air outlet port and an air supply system having a compressor connected in fluid communication with the inlet port and a throttle valve connected in fluid communication with the outlet port. A controller is programmed to change a position of the throttle valve based on a target mass air flow, a measured mass air flow, a measured pressure, and the position of the throttle valve.

A thermal management system includes a first cooler that cools a first heat source, a first circulation path that connects the first cooler and a first pump, a second cooler that cools a second heat source, a second circulation path that connects the second cooler and a second pump, a changeover valve, and a controller. The changeover valve is switchable between first and second valve positions. The first and second circulation paths are separated from each other when the changeover valve is in the first valve position. The controller causes both the first and second pumps to operate when the temperature difference between refrigerants in the first and second circulation paths is more than a predetermined temperature difference threshold when the changeover valve is set to the first valve position and one of the first and second pumps is operating and the other is not operating.

A vehicle electrical system is equipped with a DC charging connection, a rechargeable battery, a first DC-DC converter and an electrical drive. The first DC-DC converter has a first side. This is connected to a connecting point via a first switch. The first DC-DC converter has a second side to which the electrical drive is connected. The second side is connected to the rechargeable battery via a second switch and via a connecting point or is connected to the rechargeable battery directly. The vehicle electrical system has a second DC-DC converter. This is connected to one side of the first switch.

A supply device for supplying electricity to at least one consumer includes: a primary power supply in which there is a first fuel cell device having a first performance; a voltage transformer which connects the primary power supply to a secondary power supply having a battery; and a measuring device for detecting an insulation resistance of the primary power supply and/or of the secondary power supply. A second fuel cell device having a second performance is connected in series with the first fuel cell device in the primary power supply, wherein a bridge circuit comprising a switch is connected in parallel with each of the fuel cell devices and wherein the switches of the bridge circuits can be switched in accordance with the detected insulation resistance. A fuel cell vehicle and a method for limiting voltage in a supply device are also provided.

A cooling system for a power storage device includes a blower fan that is mounted in a vehicle along with the power storage device and that blows air in a cabin to the power storage device and a control device that controls the blower fan. The control device stops the blower fan when it is ascertained that predetermined conditions that the vehicle is in a stopped state, a current-relevant value relevant to a current of the power storage device is in a predetermined range including a value 0, the blower fan is being driven, and the temperature of the power storage device is increasing are satisfied.

A paving machine is described. The paving machine includes a powertrain with a power unit. The power unit may include a diesel generator and a battery. The powertrain may also include one or more drivetrains. The drivetrains may include a hydraulic drivetrain and an electric drivetrain. The drivetrains may receive power from the power unit for supplying power to actuators of the hydraulic drivetrain and the electric drivetrain. The paving machine may be a curb-forming machine including the battery, the hydraulic drivetrain, and the electric drivetrain. The hydraulic drivetrain of the curb-forming machine may include a cylinder, crawler, steering assembly, and auger, and the electric drivetrain may include a vibrator. The paving machine may also include a number of other types of paving machines. Where the paving machine includes the hydraulic drivetrain, a buffer may be provided to ensure sufficient hydraulic power in response to demand changes.

Aspects of the invention are directed towards a system and method for safe decoupling of the external power supply from a vehicle. The technology described herein provides an indication or an alert to the user at an appropriate time and avoids the possible damage to the system. The system comprises an electrical port by which the refrigerator can be connected to an external AC mains supply via an electrical cable when the vehicle is in stationary state. The system further comprises a refrigerator main controller unit (RMU) for controlling the power delivered to the refrigerator in both stationary and driving states of the vehicle. There is a safety system installed for restricting the vehicle from being driven when the electrical port of the system is connected to the AC mains supply via the electrical cable and the refrigerator is powered by the AC mains supply.

An electric vehicle drive system and an electric vehicle. The electric vehicle drive system includes a powertrain and a transmission system. The powertrain includes a first power output mechanism and a second power output mechanism. One end of the transmission system is connected to the first power output mechanism, and the other end is configured to be connected to an air-conditioner compressor. The second power output mechanism is configured to drive the electric vehicle to travel. The powertrain in the electric vehicle drive system can also drive the air-conditioner compressor when driving the electric vehicle, to reduce a quantity of components inside the electric vehicle, thereby reducing space occupancy and costs.

Methods and systems are provided for an electric drivetrain. In one example, the electric drivetrain system includes a first and a second electric motor-generator rotationally coupled to a planetary assembly that is rotationally coupled to a drive axle via an output gear. The system further includes a controller that is configured to, during a first operating condition, operate each of the first and second electric motor-generators in a motor mode or a generator mode and hold the output gear at a zero speed.