A method for the diagnosis of the offset of the resolver of an electric motor, comprising acquiring a predetermined offset of a resolver associated with the electric motor; in a first transient, supplying an excitation current to the phases of the electric motor. As a consequence of the excitation current, a current established on the axis d of minimum reluctance and a current established on an axis q in phase quadrature with respect to the axis of minimum reluctance are determined. The correctness of the offset of the resolver is diagnosed if the current established on the axis d in the first transient is higher than the current established on the axis d in the second or third transient, and if the current established on the axis q in the first transient is lower than the current established on the axis q in the second or third transient.

A mechatronic assembly drives a member intended to be linked to a DC electrical power source and to an ECU control unit. The ECU includes a computer for executing a feedback control algorithm delivering an item of direction and torque information. The assembly includes an actuator formed by a brushless polyphase electric motor having N phases, binary detection probes for detecting the position of the rotor of the motor, an electronic circuit comprising a power bridge for powering the N phases of the motor. It further includes an onboard electronic control circuit without a microcontroller, computer and memory of which the input receives the item of direction and torque information from the ECU and of which the output controls the power bridge directly modulating the current of the DC electrical power source applied to each of the phases of the motor, and the torque and direction information provided by the ECU is separate from the power signal delivered only by the power source.

An electric vehicle propulsion control device includes a power converter that applies an alternating-current voltage to an induction machine and a controller that controls the power converter based on an external operation command. The controller includes a first calculation unit. The first calculation unit calculates, from current information (id and iq) detected at the induction machine and current command values (id*1 and iq*1) that are based on the operation command, a d-axis voltage command (Vd*1) and a q-axis voltage command (Vq*1) for the power converter, and a primary magnetic flux φds and a secondary magnetic flux φdr of the induction machine. The first calculation unit also adds to or subtracts from a term including the q-axis voltage command (Vq*1) an interference term stemming from the d-axis voltage command (Vd*1) in calculating a first speed ω1 that is a free-run speed of the induction machine.

A detachable modular electric skateboard which comprises a board body, wheel frames arranged at the bottom of the board body and provided with wheels driven by external force to travel together with the board body and the wheel frames, a traveling suspension part detachably installed at the end of the board body, and a power supply control part arranged at the bottom of the board body and provided with a detachably-installed battery assembly, and further discloses a remote control device for controlling the electric skateboard. Through the detachable traveling suspension part and the power supply control part, the advantages of existing electric skateboards and ordinary skateboards are integrated, a user can achieve the function switching according to requirements, and the detachable modular electric skateboard can replace daily vehicles driven by manpower and perfectly shows the recreational significance of ordinary skateboards serving as sports equipment.

A vehicle power system includes a controller configured to issue commands to open a selected set of switches of an inverter and then to operate the selected set of switches according to a pulse width modulation signal having an increasing duty cycle such that input current to a battery is driven towards zero and a magnitude of d-axis current of the drive system is reduced in response to a fault with an electric drive system.

A railway vehicle comprises a traction system including an asynchronous electric motor or a synchronous electric DC motor operable by an inverter electronic drive system. The vehicle further comprises an electronic control unit coupled to the traction system and configured to receive signals/data/commands indicative of operating conditions of the vehicle and of the traction system and to determine, based on the received signals/data/commands, the occurrence of a coasting condition of the vehicle and the occurrence of an exit condition from the coasting condition of the vehicle. If a coasting condition of the vehicle occurs, the electronic drive system is controlled to cause the electric motor to undergo magnetic flux changes. If an exit condition from the coasting condition occurs, and depending whether the electronic drive system is on or off, the electronic drive system is controlled to increase torque of the electric motor or to reduce magnetic flux reduction.

A charging apparatus and an electric vehicle including the same are disclosed. The charging apparatus includes a converter for, in a charging mode, converting an input alternating current (AC) voltage into a direct current (DC) voltage and a controller for controlling the converter. The converter includes a motor and a switching unit that is connected to an additional coil wound on a stator of one phase of the motor, and that supplies the input AC voltage to the motor by performing a switching operation. The converter also includes an inverter that, in a motor operation mode, converts a DC voltage from a battery into an AC voltage by a switching operation and drives the motor. In the charging mode, the inverter converts the input AC voltage into the DC voltage using the additional coil of the motor and the switching unit and supplies the DC voltage to the battery.

A power supply system includes a first controller that, controls an MG1 inverter, a second controller that controls an MG2 inverter, and a voltage sensor that detects a voltage generated from a pair of output terminals. The first controller controls the MG1 inverter according to a target value of the voltage generated from the output terminals, irrespective of the magnitude of a deviation between the target value of the voltage generated from the output terminals, and the detected voltage. The second controller controls the MG2 inverter according to the deviation. This processing is implemented by an effective value computing unit, effective value PI control unit, and a neutral point output voltage command unit.

A vehicle includes an electric power storage, an electric power generator, a rotating electric machine, and circuitry. The rotating electric machine is driven with electric power stored in the electric power storage and/or generated by the electric power generator to move the vehicle. The circuitry is configured to calculate target driving force for rotating electric machine, to detect surplus electric power which is generated due to a response delay of the electric power generator upon decreasing an amount of electric power generated by the electric power generator when the target driving force decreases, and to drive the rotating electric machine, when detecting the surplus electric power, with a phase current different from a maximum efficiency phase current with which an electric current value or electric power loss of the rotating electric machine is smallest so that the rotating electric machine consumes the surplus electric power.

A variable magnetization machine control system comprising a controller configured to generate a reversely rotating d-axis/q-axis current vector trajectory during a change in a magnetization state of a variable magnetization machine to drive the variable magnetization machine at a predetermined speed while maintaining the driving voltage below a predetermined maximum magnitude.