Provided is a laundry treatment machine including a washing tub, a washing tub motor, a water level sensor, a drain pump, a motor configured to operate the drain pump, a converter configured to output DC power, an inverter configured to convert the DC power into AC power, and a controller configured to, when power consumed by the motor during a drainage operation does not reach first power, perform control to increase a speed of the motor or the power consumed by the motor, and when the power consumed by the motor during the drainage operation reaches the first power and remains within a first range corresponding to the first power and then falls from the first range, output a drainage completion message. Accordingly, it is possible to quickly and accurately determine the completion of the operation of the drain pump. Therefore, it is possible to shorten the drainage time and reduce the waste of power.

A robot apparatus equipped with a driving source includes a power transmission module configured to transmit power to the driving source, a power reception module configured to receive the power transmitted by the power transmission module, and a control device configured to control a power transmission start timing in such a manner that the power reception module receives predetermined power at a timing at which the driving source operates.

An electric system of an electromechanical power transmission chain is provided that includes a first capacitive circuit, converter equipment between the first capacitive circuit and an electric machine, a second capacitive circuit, and a direct voltage converter between the first and second capacitive circuits. The electromechanical power transmission chain is a parallel transmission chain where the electric machine is mechanically connected to a combustion engine and to one or more actuators. The electric system includes a control system for controlling the direct voltage converter in response to changes in a first direct voltage of the first capacitive circuit and for controlling the converter equipment in response to changes in a second direct voltage of the second capacitive circuit. The first direct voltage is kept on a predetermined voltage range whereas the second direct voltage is allowed to fluctuate in order to respond to peak power needs.

An HVAC actuator (1) comprises an electric motor (11); an energy buffer (13) configured to store electrical energy from a power supply (2), and to provide the electrical energy to the motor (11); and a power limiting circuit (12) configured to limit input power from the power supply (2) to the energy buffer (13) to a threshold lower than motor power drawn by the motor (11) from the energy buffer (13).

A power conversion device includes a switching circuitry configured to supply a driving alternating current (AC) power to a motor of a controlled object that includes the motor and a movable part driven by the motor, and detect an abnormality in the controlled object based on the index information acquired.

A motor drive system includes: a flywheel; a servomotor for buffer which includes a plurality of independent windings and allows the flywheel to rotate; a plurality of inverters for buffer respectively connected to the windings; a plurality of converters respectively connected to the DC links; inverters for drive which perform power conversion between a DC power in the DC links and an AC power which is a drive power or a regenerative power of the servomotor for drive; and a motor control unit for buffer configured to control driving of the servomotor for buffer by controlling power conversion of the respective inverters for buffer respectively connected to the windings.

A motor drive device controls driving of a plurality of motors that rotate a common drive shaft, and includes: a motor drive device that outputs the same drive power to each motor of the plurality of motors, and includes a motor drive controller that controls the drive power, using a rotation speed detection signal of a motor of the plurality of motors as a feedback signal; and a controller that determines a drive abnormality from the rotation speed detection signal of the motor or the drive power of the motor, wherein the controller determines a motor abnormal state and an overloaded state, from the drive power of the motor.

An electric system of an electromechanical power transmission chain is provided that includes a first capacitive circuit, converter equipment between the first capacitive circuit and one or more electric machines, a second capacitive circuit, and a direct voltage converter between the first and second capacitive circuits. The electric system includes a control system for controlling the direct voltage converter in response to changes in first direct voltage of the first capacitive circuit and for controlling the converter equipment in response to changes in second direct voltage of the second capacitive circuit. The control of the first direct voltage is faster than the control of the second direct voltage so as to keep the first direct voltage on a predetermined voltage range and to allow the second direct voltage to fluctuate in order to respond to peak power needs.

A control system for an electric motor powered by a battery can be configured to receive an input power or torque command corresponding to a commanded power or torque. The control system can be configured to determine if the battery is capable of supplying the commanded power or torque over a time period based on a state of charge of the battery. The control system can be configured such that if the battery is capable of supplying the commanded power or torque over the time period, the control system outputs the input power or torque command, and if the battery is not capable of supplying the commanded power or torque over the time period, the control system outputs an available maximum power or torque command corresponding to an available maximum power or torque over the time period that is less than the commanded power or torque.

An unmanned aerial vehicle includes a fuselage, a motor mounted at the fuselage, and a control apparatus configured to control the motor. The control apparatus includes one or more processors configured to obtain a present electrical parameter of a battery configured to power the motor, calculate a compensation amount of a control signal of the motor according to the present electrical parameter, and modify the control signal according to the compensation amount.