Methods and systems are provided related to a self-propelling work machine in the form of a tracked vehicle having an electric drive, with a generator drivable by an internal combustion engine, an auxiliary unit connected to the engine, and a braking apparatus for braking the work machine. The braking apparatus provides regenerative braking by the electric drive and comprises a feedback apparatus for feeding back electrical motor braking power of the electric motor to the generator to apply the motor braking power on the engine and on the auxiliary unit. A controller automatically increases or decreases the electrical load of the auxiliary unit based on the electrical motor braking power fed back to the engine and/or based on an engine speed.

Methods and systems are provided related to a self-propelling work machine in the form of a tracked vehicle having an electric drive, with a generator drivable by an internal combustion engine, an auxiliary unit connected to the engine, and a braking apparatus for braking the work machine. The braking apparatus provides regenerative braking by the electric drive and comprises a feedback apparatus for feeding back electrical motor braking power of the electric motor to the generator to apply the motor braking power on the engine and on the auxiliary unit. A controller automatically increases or decreases the electrical load of the auxiliary unit based on the electrical motor braking power fed back to the engine and/or based on an engine speed.

When grounded, aircraft may taxi using thrust from the main aircraft engines, which can waste fuel and is often inefficient. This disclosure outlines an electric aircraft taxi system, or eTaxi system, that can operate without continuous power from the aircraft engines, allowing the engines to be turned off during taxi to save fuel. An electric auxiliary power unit, or eAPU, is equipped on the aircraft and powers electric motor-generators that can both drive landing gear wheels and regenerate power from the wheels during regenerative braking. When the eTaxi system is on, a drive controller and a taxi controller gather inputs from the aircraft controls and converts them into commands sent to the electric motor-generators, brakes, and steering devices.

When grounded, aircraft may taxi using thrust from the main aircraft engines, which can waste fuel and is often inefficient. This disclosure outlines an electric aircraft taxi system, or eTaxi system, that can operate without continuous power from the aircraft engines, allowing the engines to be turned off during taxi to save fuel. An electric auxiliary power unit, or eAPU, is equipped on the aircraft and powers electric motor-generators that can both drive landing gear wheels and regenerate power from the wheels during regenerative braking. When the eTaxi system is on, a drive controller and a taxi controller gather inputs from the aircraft controls and converts them into commands sent to the electric motor-generators, brakes, and steering devices.

A mining machine including a bi-directional electrical bus, a power source coupled to the bi-directional electrical bus, a motor coupled to the bi-directional electrical bus, the motor powered by energy available on the bi-directional electrical bus, a kinetic energy storage system coupled to the bi-directional electrical bus and a controller. The controller is configured to communicate with the kinetic energy storage system and the power source. Wherein the controller is configured to operate the kinetic energy storage system as a primary power source for the bi-directional electrical bus and to operate the power source as a secondary power source for the bi-directional electrical bus when the kinetic energy storage system cannot satisfy an energy demand on the bi-directional electrical bus.

An electric vehicle controller includes an inverter that drives a motor by receiving power supplied from an overhead line, a brake chopper circuit that includes a switching device and a braking resistor and is connected in parallel with the inverter, a voltage detector that detects a bus voltage applied to DC buses, and a control unit that performs power consumption control of causing the braking resistor to consume regenerative power supplied from the motor and overvoltage suppression control of suppressing the bus voltage from being excessive. The control unit controls the switching device such that a second duty ratio used at the time of performing the overvoltage suppression control is lower than a first duty ratio used at the time of performing the power consumption control.

A braking control method and device for a vehicle are disclosed. According to certain embodiments, the device may include a controller configured to: detect a panic braking event initiated by a user; activate regenerative braking to decelerate the vehicle; monitor an amount of friction braking generated by a friction braking system of the vehicle; monitor rotational speeds of one or more wheels of the vehicle; and adjust an amount of the regenerative braking based on the amount of the friction braking and the rotational speeds of the one or more wheels. The device may further include at least one actuator for applying the adjusted amount of the regenerative braking.

A power net system of a fuel cell vehicle is provided. The power net system includes a fuel cell and a first switching unit that is configured to form and block an electrical connection between an output terminal of the fuel cell and a main bus. A load device diverges and is connected between the output terminal and the first switching unit. A reverse current blocking unit is disposed between the output terminal of the fuel cell and a node from which the load device diverges and is configured to block a current flow to the output terminal of the fuel cell. A second switching unit is configured to form and block an electrical connection between the output terminal of the fuel cell and the load device. A controller operates the first and second switching units to form the electrical connection between the main bus and the load device.

A power net system of a fuel cell vehicle is provided. The power net system includes a fuel cell and a first switching unit that is configured to form and block an electrical connection between an output terminal of the fuel cell and a main bus. A load device diverges and is connected between the output terminal and the first switching unit. A reverse current blocking unit is disposed between the output terminal of the fuel cell and a node from which the load device diverges and is configured to block a current flow to the output terminal of the fuel cell. A second switching unit is configured to form and block an electrical connection between the output terminal of the fuel cell and the load device. A controller operates the first and second switching units to form the electrical connection between the main bus and the load device.

Methods and systems are provided related to a self-propelling work machine in the form of a tracked vehicle having an electric drive, with a generator drivable by an internal combustion engine, an auxiliary unit connected to the engine, and a braking apparatus for braking the work machine. The braking apparatus provides regenerative braking by the electric drive and comprises a feedback apparatus for feeding back electrical motor braking power of the electric motor to the generator to apply the motor braking power on the engine and on the auxiliary unit. A controller automatically increases or decreases the electrical load of the auxiliary unit based on the electrical motor braking power fed back to the engine and/or based on an engine speed.