A method for estimating power consumption of a motor includes steps of: determining an error voltage for a terminal voltage of each of multiple phases of the motor, the terminal voltage being supplied from an inverter to the motor; generating a compensation terminal voltage for each of the multiple phases of the motor by applying the error voltage to a prediction value of the terminal voltage that is derived in a preset manner during operation of the motor; and calculating power consumption of the motor by using the compensation terminal voltage and a current value obtained by detecting a current that flows in each of the multiple phases of the motor.

A power supply device includes: a power supply; a conversion module including a plurality of conversion units configured to perform voltage conversion of power supplied by the power supply, the plurality of conversion units being electrically connected in parallel to each other; and a change unit that an operation number, which is the number of the conversion units performing the voltage conversion. The change unit prohibits a change to an operation number in which current imbalance occurs between the conversion units performing the voltage conversion.

A power supply device includes: a power supply; a conversion module including a plurality of conversion units configured to perform voltage conversion of power supplied by the power supply, the plurality of conversion units being electrically connected in parallel to each other; and a change unit that an operation number, which is the number of the conversion units performing the voltage conversion. The change unit prohibits a change to an operation number in which current imbalance occurs between the conversion units performing the voltage conversion.

A power-supply apparatus includes: an energy storage unit including energy storage modules; switches conducting or shutting off a current and switching a connection state of the storage modules; a voltage control unit switching a voltage of the energy storage unit; drive units, connected to the energy storage unit in series, driving respective external rotating electrical machines; and a capacitor connected to the drive units. Further, the power-supply apparatus includes a control unit that, when the voltage control unit switches the voltages of the energy storage unit, supplies electric power regenerated in the drive units to the capacitor and discharges the capacitor, and after an absolute value of a voltage difference between a post-switching voltage of the energy storage unit and a voltage of the capacitor is less than a predetermined value, controls so that the post-switching voltage of the energy storage unit is applied to the capacitor.

A vehicle includes a controller programmed to, responsive to injecting a high frequency voltage signal to an electric machine, determine an estimated negative sequence current phase associated with an electric machine current, and responsive to a rotor of the electric machine being at a predetermined rotor position, inject a pulse torque command to the electric machine and observe a speed change of the electric machine to determine a cable sequence.

A vehicle includes a gear mechanism connected to a driving wheel; a traveling electric motor configured to exchange heat with a heat exchange medium shared by the gear mechanism and output motive power to the driving wheel via the gear mechanism; and a controller configured to change an operating point of the traveling electric motor to a stronger field side rather than a maximum efficiency point in a case that a temperature of the heat exchange medium is less than a predetermined temperature.

According to one or more embodiments, an example system includes a motor, and a motor control system that includes a low side current measurement subsystem. The system further includes a processor that switches the motor control system to use feedforward current control in response to detecting a current measurement failure in the low side current measurement subsystem. The processor further identifies a first phase that has a failed current measurement. The processor also computes a current measurement for the first phase, which has the current measurement failure. The processor further uses the computed current measurement to compute a parameter estimate.

An electronic speed controller includes an output circuit and one or more processors. The output circuit is configured to control currents to a plurality of motors of an unmanned aerial vehicle (UAV). The motors are configured to drive the UAV. The one or more processors are configured to, individually or collectively, determine an operating state of a first motor of the plurality of motors, collect power from the first motor in response to the operating state of the first motor is a decelerating state, and distribute at least a portion of the power collected from the first motor to a second motor of the plurality of motors.

A control system and method for a powertrain unit of a pedal assisted electrical bicycle, the powertrain unit including an electrical motor, a DC/AC converter to supply the motor from a battery wherein the following steps are taken: starting the electrical machine in order to rotate the rotor; estimating a back electromotive force produced by the electrical machine; estimating the angular position of the rotor with respect to the stator winding starting from the estimation of the back electromotive force; controlling the DC/AC converter based on said estimated angular position in order to make it supply the stator winding so that said electrical machine delivers a torque.

A vehicle includes a motor, a power converter, a fuel tank, and a three-phase line. The motor moves the vehicle. The power converter is connected to the motor. The power converter is configured to convert electric power and to supply the converted electric power to the motor. The fuel tank is disposed between the motor and the power converter. The fuel tank has a tank bottom on a side of a bottom of the vehicle. The tank bottom has a recess. The three-phase line is provided in the recess. The motor is electrically connected to the power converter via the three-phase line.