A drive control system controls travel of an electric vehicle, the drive control system including a plurality of induction motors, one inverter that drives the plurality of induction motors, and a controller that controls the inverter. The controller includes a coupling disconnection detecting unit that calculates an estimated torque value on the basis of a total current and a voltage command value at the start of the induction motors, and detects disconnection of a coupling provided between the induction motors and a drive mechanism of the electric vehicle on the basis of the estimated torque value calculated and a torque command value.

A control method for an electric vehicle using a motor as a traveling drive source to decelerate by a regenerative braking force of the motor, including: obtaining an accelerator operation amount; estimating a disturbance torque acting on a vehicle body of the electric vehicle; obtaining an angular velocity of a rotating body that correlates to a rotation speed of a drive shaft which drives the electric vehicle; calculating a first torque command value based on the accelerator operation amount; setting the first torque command value to a torque command value; controlling a torque generated in the motor based on the torque command value; setting a target stop position at the time of stopping the electric vehicle; calculating a target angular velocity of the rotating body according to a distance from the electric vehicle to the target stop position; calculating a second torque command value for stopping the electric vehicle at the target stop position based on a difference between the target angular velocity and the obtained angular velocity; and converging the torque command value to the disturbance torque by setting the second torque command value to the torque command value and adjusting the braking and driving forces of the motor according to a distance to the target stop position, when the accelerator operation amount decreases or becomes zero and the electric vehicle is about to stop.

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.

An electrified vehicle system includes an electric motor coupled to a drive wheel via a plurality of power transmission components and a control device. The control device is configured to act as: a feedforward control section configured based on a transfer function simulating vibration transmission characteristics of a power transmission system, receiving as an input a required torque of the electric motor from a driver, and outputting a base command torque of the electric motor; a timing estimation section estimating, based on information on the power transmission system, a timing at which a backlash between the plurality of power transmission components is eliminated; and a torque correction section applying, to the base command torque, a correction torque for reducing a vibration generated in the power transmission system due to elimination of the backlash, in response to an arrival of the timing estimated by the timing estimation section.

A processor unit (3) is configured for executing an MPC algorithm (13) for model predictive control of an electric machine (8) of a drive train (7) of a motor vehicle (1). The MPC algorithm (13) includes a longitudinal dynamic model (14) of the drive train (7) and a cost function (15) to be minimized. The cost function (15) includes a first term, a second term, and a third term. The processor unit (3) is configured for determining an input variable for the electric machine (8) by executing the MPC algorithm (13) as a function of the first, second, and third terms such that the cost function is minimized.

A small electric vehicle includes: left and right motors connected so as to respectively transmit power to left and right driving wheels; left and right rotation speed sensors; a joystick-type operation element; and a control unit, wherein it is configured to calculate target rotation speeds of the left and right motors, based on a target vehicle speed and a target vehicle angular velocity that are provided according to an operation position of the operation element, and control the left and right motors such that the actual rotation speeds of the left and right motors follow the respective target rotation speeds, and configured to update at least one target value, according to a cumulative number of travels obtained by dividing, by a predetermined control unit, a cumulative total value of a cumulative power consumption obtained by the battery management unit.

An abnormality diagnosis apparatus includes: a friction identification unit that calculates a friction parameter that is a parameter used for calculation of frictional force of a power transmission mechanism connected to a motor; a model torque calculation unit that calculates model torque by performing a process of calculating an estimated value of torque of the motor by using a set value calculated in advance and the friction parameter; and an abnormality determination unit that diagnoses whether the power transmission mechanism is abnormal, on the basis of a result of comparison between the model torque and a motor torque detected by a motor torque detection unit.

A regenerative braking control method and a regenerative braking control device of the present invention control a drive source that generates a regenerative brake force in such a manner that an upper limit of regenerative deceleration when a driver executes manual control becomes smaller than an upper limit of regenerative deceleration when automatic control is executed.

A method of controlling an electric marine propulsion system configured to propel a marine vessel and powered by a power storage system includes presenting on a user interface a plurality of power mode options selectable by a user, including at least a reduced power and an emergency power mode. Upon selection of the reduced power mode by the user, at least one auxiliary devices utilizing power from the power storage system is automatically turned off and the propulsion system is controlled so as not to exceed a first speed limit. Upon selection of the emergency power mode by the user, the at least one auxiliary device utilizing power from the power storage system is turned off and the propulsion system is controlled so as not to exceed a second speed limit that is lower than the first speed limit.

In accordance with at least one aspect of the present disclosure, there is provided a method for controlling power in an aircraft. The method includes, monitoring an electric energy storage module electrically connected to an electrical bus for an exceedance of a first current limit and monitoring a generator module connected to the electrical bus for an exceedance of a second current limit. If the current limit of either of the electric energy storage module or the generator module is exceeded by a predetermined exceedance amount, the method includes reducing a power consumption for an electric machine by a predetermined bias until the exceedance of the electrical energy storage and the exceedance of the generator module are both less than or equal to zero.