A method for operating an electric drivetrain of a working machine is provided wherein the drivetrain comprises a work drive with an electric work motor and a travel drive with an electric travel motor and vehicle wheels, wherein the working machine experiences a speed deceleration from the outside that may result in a braking force acting on the vehicle wheels lower than a driving force acting on the vehicle wheels due to a moment of inertia of the travel motor. The method includes supplying the travel motor with a power in a direction opposite to an operating direction of the travel motor in order to reduce a rotational speed of the travel motor, if it is detected in advance using a situation detection that the braking force acting on the vehicle wheels as a result of the speed deceleration is lower than the driving force acting on the vehicle wheels.

A transport refrigeration system (1) includes a transportation refrigeration unit (37); a generator (11) connected to a wheel axle (7A) of the transport refrigeration system (1), the wheel axle (7A) being coupled to a wheel (5), wherein the generator (11) is configured to be driven to generate electricity by rotation of the wheel axle (7A) and to supply that electricity to the transportation refrigeration unit (37); and a damper (23) connected to the wheel axle (7A) between the wheel (5) and the generator (11). Short spikes or pulsations in torque along the wheel axle (7A) resulting from, e.g., harsh braking or wheel blocking can be, dampened, either wholly or partly, by the damper (23) such that damage to the transport refrigeration system (1) can be avoided.

A method, apparatus, and system are disclosed for incrementally derating a torque applied by a drivetrain in response a number of traction control events detected by a traction control system over a predetermined time period.

An apparatus and a method of reducing vibration of an electric vehicle capable of effectively reducing vibration by applying a drivetrain torsion speed during anti jerk control to extract a vibration-induced portion and processing the vibration-induced portion to generate a final output torque, include a drivetrain torsion speed calculator, a motor speed calculator, a model speed calculator, a vibration-induced portion calculator, a high-pass filter, a phase delay unit, and an anti jerk compensation torque generator.

A method for braking an electric vehicle in which a first axle of an electric vehicle is decelerated by an electric motor of the electric vehicle and/or by a friction brake system of the electric vehicle.

Pulsed control of electric motors, and more particularly, to selectively adjusting one or more of a pulsing frequency, an amplitude of the pulses and/or a duty cycle of the pulses for reducing Noise, Vibration and Harshness (NVH) while maintaining high levels of operating efficiency.

A method of controlling driving of a vehicle using an in-wheel system includes: calculating a time to collision (TTC) by dividing a distance between the vehicle and an obstacle located in front of the vehicle by relative velocity; determining whether the vehicle enters a braking avoidance section, based on the calculated TTC; and generating, by a motor mounted in each wheel, braking force of a brake by an amount of shortage of braking force of the brake compared with a demanded braking force if the vehicle enters the braking avoidance section.

Systems and methods to control the vehicle speed of a vehicle includes a motor and a controller coupled to the motor. The controller is structured to: determine that a speed of a vehicle is at or above a predetermined speed limit; activate a motor speed governor responsive to an input received by the controller, wherein the motor speed governor is structured to control a vehicle speed; and adjust an output torque based on the vehicle speed being at or above the predetermined speed limit.

A system for an electrically driven vehicle includes at least one motor controller configured to control at least one electric motor, with which at least one drive wheel of the vehicle can be driven. The system further includes at least one brake controller configured to control friction brakes, with each of which one of multiple drive wheels and/or non-driven wheels can be braked. The brake controller and the electric motor controller each have a data interface that is a bus interface. The brake controller and the electric motor controller are set up to send and/or receive data with a predefined maximum data transmission rate via the first data interface. The brake controller and the electric motor each have a second data interface, each second data interface being designed to send and/or receive data with a higher data transmission rate than the maximum data transmission rate of the first data interface.

There is provided an electrically driven vehicle that well balances calculation volumes and communication volumes of two control devices configured to drive and control motors for driving. The electrically driven vehicle comprises at least one motor for driving and a first control device and a second control device configured to control the motor. The first control device is configured to calculate a target torque that is to be output from the motor, based on information including an accelerator position, to calculate a current command based on the calculated target torque, and to send the calculated current command to the second control device. The second control device is configured to use the current command, a phase current of the motor and a rotational angle of the motor such as to drive the motor by feedback control.