A torque map generation system includes a motor, an inverter that drives the motor, a controller that controls the inverter, a torque sensor coupled to the motor, a power analyzer coupled to the torque sensor and a torque map generator that measures a current vector value of the motor by switching a MTPA (Maximum Torque Per Ampere) method and a square wave method based on a voltage utilization ratio of the inverter, wherein the torque map generator utilizes a measurement result by the MTPA method when the torque map generator uses the square wave method.

A drivetrain includes an electric machine, an inverter, and a controller. The controller, for a given operating point of the electric machine, may schedule a method of commutation for switches of the inverter during presence of a negative wheel torque request according to a charge rate corresponding to the negative wheel torque request, temperatures of the electric machine and/or inverter, and/or a battery state of charge.

The present disclosure relates to a system for controlling a motor of a vehicle for increasing control accuracy of the motor for driving the vehicle, and an object of the present disclosure is to provide a system for controlling a motor of a vehicle, which may accurately perform a motor control even when a battery voltage (i.e., motor voltage) applied to the motor upon the driving control of the motor is changed.

A power conversion device includes a first converter configured to convert at least first battery power output by a first battery into first output power of a first voltage waveform based on an output waveform profile that has been input or set and output the first output power and a first generator configured to generate and output second output power based on the first battery power. Third output power of an alternating current (AC) control waveform generated by adding the first output power to the second output power is supplied to a load.

A power supply system 1 includes: a DC power supply 30; a variable voltage power supply 7 serving as an isolated bidirectional DC/DC converter that outputs power of a variable voltage E2 from a pair of secondary-side input/output terminals 72p and 72n; a positive electrode power line 21 and a negative electrode power line 22 that are connected to both electrodes of the DC power supply 30; a switching circuit 5 including a plurality of arm switching elements 51, 52, 53, and 54 that connect the power lines 21 and 22 and a load 4; a backflow prevention switching element 34 that is provided on the positive electrode power line 21 between the pair of secondary-side input/output terminals 72p and 72n; a power supply driver 6 that operates the variable voltage power supply 7 and the backflow prevention switching element 34; and a switching circuit driver 8.

An electrical system configured to control an electrically-excited electric motor, including: an inverter configured to supply alternating current (AC) electrical power to the electrically-excited electric motor; the electrically-excited electric motor, including: a rotor having a rotor winding; and a stator having a stator winding; the stator winding is electrically connected to the inverter and the rotor winding is electrically connected to the inverter such that the stator winding receives an electrical current from the inverter and supplies a direct current (DC) component to the rotor.

Systems, devices, computer-implemented methods, and/or computer program products that can facilitate an intelligent battery cell are addressed. In one example, a device can comprise: active battery cell material; and an internal circuit coupled to the active battery cell material and comprising: a circuit board; two alternating current (AC) power points; two isolated direct current (DC) power points; and a controller that can operate one or more switches on an H-bridge circuit to disconnect the device from a main battery in a bypass mode. In another example, a smart cell modulator can comprise: a set of smart battery cells; and a controller that can operate to selectively engage a subset of the smart battery cells to enable load sharing, distributed feedback control, circulate load across one or more smart battery cells of the set of smart battery cells to increase torque, and to enable speed requests.

A network of an electric vehicle has an energy supply interface, an inverter, an energization interface and a soft starter. The inverter has a first inverter connection configured to connect the inverter to the energy supply interface and a second inverter connection configured to connect the inverter to the energization interface and the soft starter. The inverter is configured to convert a DC voltage applied to the first inverter connection to an AC voltage and to supply same at the second inverter connection. The soft starter is configured to reduce an input voltage applied to the first soft starter connection and to supply the operating voltage, which is reduced compared to the input voltage, at the second soft starter connection.

A regenerative braking controller for an AC motor. To determine an electromagnetic torque for slowing or stopping the motor, the regenerative braking controller accesses a lookup table to retrieve a braking torque value corresponding to a current estimate of rotor velocity. The retrieved braking torque may correspond to a maximum or minimum torque level at which regenerative braking will occur at the current rotor velocity, or to a torque level at which charging current during regenerative braking will be maximized. If an external mechanical brake is present, the regenerative braking controller can forward an external braking torque signal to a controller so that the mechanical brake can apply the remainder of the braking force beyond that indicated by the regenerative braking torque. A method for establishing the braking torques to be stored in the lookup table is also disclosed.

A regenerative braking controller for an AC motor. To determine an electromagnetic torque for slowing or stopping the motor, the regenerative braking controller accesses a lookup table to retrieve a braking torque value corresponding to a current estimate of rotor velocity. The retrieved braking torque may correspond to a maximum or minimum torque level at which regenerative braking will occur at the current rotor velocity, or to a torque level at which charging current during regenerative braking will be maximized. If an external mechanical brake is present, the regenerative braking controller can forward an external braking torque signal to a controller so that the mechanical brake can apply the remainder of the braking force beyond that indicated by the regenerative braking torque. A method for establishing the braking torques to be stored in the lookup table is also disclosed.