Abstract: A power conversion apparatus that converts an input alternating current power supplied from an alternating current power supply into an output alternating current power having a predetermined voltage and frequency, includes an inverter circuit configured to supply the output alternating current power to a motor, and a compensation unit configured to compensate for a harmonic of an input power of the motor, and the compensation unit detects a harmonic component generated in synchronism with a speed of the motor in the input power, and varies a phase of an alternating current voltage output from the inverter circuit at the same frequency as the harmonic component, so as to reduce the harmonic component.

Abstract: A motor control apparatus configured to convert an input power supplied from a power supply to an output alternating-current power having a predetermined voltage and a predetermined frequency is provided. The motor control apparatus includes an inverter circuit configured to supply the output alternating-current power to a motor, and is configured to perform a control to suppress an amplitude of a first harmonic component that occurs synchronously with a rotation rate of the motor in a power input into the motor to be lower than or equal to a predetermined value and to suppress an amplitude of a second harmonic component that occurs in an electromagnetic exciting force of the motor at a same frequency as the first harmonic component to be lower than the amplitude of the second harmonic component in a case of the amplitude of the first harmonic component being suppressed to a minimum.

Abstract: Provided is a supply-and-demand management apparatus including: a result management unit that manages a power supply result indicating a result of power supplied among a plurality of customers of a community; and a deriving unit that derives, based on power supply results from a first customer to other customers from among the plurality of customers, an incentive to supply power from the first customer to a second customer from among the other customers.

Abstract: An extracellular potential measurement device includes multiple insulating films each of which is made from an electric insulating material, the insulating films being stacked and bonded to each other; and multiple electrode wires each of which is made from an electroconductive material, the electrode wires being arranged in multiple heights. Each of the electrode wires is interposed between an upper insulating film and a lower insulating film. Each of the insulating films, except for a lowermost insulating film, has an opening penetrating the insulating film. The opening in a lower insulating film has a size that is less than that of the opening in an upper insulating film, the openings in the insulating films being overlapped to form a recess having a size reducing downward, the recess being adapted to store a collection of cells. Each of the electrode wires has an end that is located near an opening in an insulating film that is immediately below the electrode wire, the ends being exposed in the recess.

Abstract: A motor control apparatus configured to convert an input power supplied from a power supply to an output alternating-current power having a predetermined voltage and a predetermined frequency is provided. The motor control apparatus includes an inverter circuit configured to supply the output alternating-current power to a motor, and is configured to perform a control to suppress an amplitude of a first harmonic component that occurs synchronously with a rotation rate of the motor in a power input into the motor to be lower than or equal to a predetermined value and to suppress an amplitude of a second harmonic component that occurs in an electromagnetic exciting force of the motor at a same frequency as the first harmonic component to be lower than the amplitude of the second harmonic component in a case of the amplitude of the first harmonic component being suppressed to a minimum.

Abstract: An air conditioner includes an indoor unit, outdoor unit, indoor unit power line, and outdoor unit power line. The power lines branch from a common power line. Each of the indoor and outdoor units includes a converter circuit, an inverter circuit, and a capacitor. A total of effective values of integer-order components from second to 40th orders in a total current, which is obtained by adding up an indoor-unit input current and an outdoor-unit input current and which flows through the common power line, is less than a sum of a total of effective values of integer-order components from the second to 40th orders included in the indoor-unit input current that flows through the indoor-unit power line and a total of effective values of integer-order components from the second to 40th orders included in the outdoor-unit input current that flows through the outdoor-unit power line.

Abstract: A system that reduces the possibility of damaging items. A route searching system includes a type-of-item obtaining part that obtains a type of an item transported by a vehicle; a destination obtaining part that obtains a destination; and a route searching part that searches for a route that reaches the destination by selecting, based on the type of an item, a road with a low possibility of damaging the item on a priority basis over a road with a high possibility of damaging the item.

Abstract: A motor drive apparatus includes a motor, a power converter, and a controller that controls the voltage supplied to the motor by the power converter. The power converter converts a voltage of a 400 V-class AC power supply to a voltage with an effective value lower than an effective value of the 400 V-class AC power supply. The power converter converts the voltage by a switching operation of a plurality of switching elements. The motor is configured so that a value of ?×Vx/Ld is greater than Pmax when an effective value voltage Vx=200 V. A d-axis inductance of the motor is Ld. A flux linkage of the motor is ?. A maximum output of the motor in a device where the motor is mounted is Pmax. The controller has a control mode in which an effective value voltage higher than Vx is applied to the motor.

Abstract: A motor drive method is a method of driving a motor by a motor drive apparatus. The motor drive apparatus includes an inverter that regulates supplied power to the motor that is a position sensorless synchronous machine, and includes a controller that outputs a control signal to control the inverter. The method includes reducing output torque of the motor to be less than maximum output torque, in a speed range that is lower than a first speed at which the motor rotates. The maximum torque that is output from the motor is the maximum output torque in a case the motor drive apparatus drives the motor.

Abstract: A motor drive method is a method of driving a motor by a motor drive apparatus. The motor drive apparatus includes an inverter that regulates supply power to the motor that is a synchronous machine and includes a controller that controls the inverter. The method includes changing, before loss of synchronism, a speed of the motor from a second speed range to a first speed range. A speed range in which the motor is operable at a substantially fixed speed is the first speed range, and a speed range that is lower than the first speed range and includes zero speed is the second speed range.

Abstract: A fluid pressure unit is provided with an inverter (17), a motor (10) controlled by the inverter, a pump (11) driven by the motor to discharge a fluid, a detector (16) configured to detect a pressure of the fluid, a flow rate of the fluid, or both, a controller (20) configured to control the inverter such that a pressure of the pump, a flow rate of the pump, or both becomes a predetermined value based on a detected value by the detector, and a suppressor (33) configured to suppress a change of an output of the inverter caused by a pulsation frequency component of the fluid included in the detected value.

Abstract: A motor drive method is a method of driving a motor by a motor drive apparatus. The motor drive apparatus includes an inverter that regulates supplied power to the motor that is a position sensorless synchronous machine, and includes a controller that outputs a control signal to control the inverter. The method includes reducing output torque of the motor to be less than maximum output torque, in a speed range that is lower than a first speed at which the motor rotates. The maximum torque that is output from the motor is the maximum output torque in a case the motor drive apparatus drives the motor.

Abstract: A motor drive method is a method of driving a motor by a motor drive apparatus. The motor drive apparatus includes an inverter that regulates supply power to the motor that is a synchronous machine and includes a controller that controls the inverter. The method includes changing, before loss of synchronism, a speed of the motor from a second speed range to a first speed range. A speed range in which the motor is operable at a substantially fixed speed is the first speed range, and a speed range that is lower than the first speed range and includes zero speed is the second speed range.

Abstract: A main object of the present disclosure is to provide a calculation device capable of accurately calculating battery remaining of an all solid state battery. The present disclosure achieves the object by providing a calculation device configured to calculate battery remaining of an all solid state battery including a cathode layer, a solid electrolyte layer, and an anode layer, the calculation device comprising: a setting unit configured to set a Li occupancy state in a thickness direction of an electrode layer which is at least one of the cathode layer and the anode layer, based on operation history of the all solid state battery; and a calculating unit configured to calculate the battery remaining based on the Li occupancy state.

Abstract: A battery system comprising a controller and a solid-state lithium secondary battery, wherein, the controller estimates an end part cathode potential Ve2 from a voltage relaxation amount ?V2; the end part cathode potential Ve2 is a local potential of an end part of the cathode; and the voltage relaxation amount ?V2 is generated by diffusion of, into the non-facing part of the anode, lithium transferred to the facing part of the anode from the cathode of the solid-state lithium secondary battery is a charged state, and wherein the controller controls execution and inexecution of charging of the solid-state lithium secondary battery so that the end part cathode potential Ve2 is equal to or less than a potential Vlimit at which a change in crystal structure of the cathode active material occurs.

Abstract: A motor drive apparatus includes a motor, a power converter, and a controller that controls the voltage supplied to the motor by the power converter. The power converter converts a voltage of a 400 V-class AC power supply to a voltage with an effective value lower than an effective value of the 400 V-class AC power supply. The power converter converts the voltage by a switching operation of a plurality of switching elements. The motor is configured so that a value of ?×Vx/Ld is greater than Pmax when an effective value voltage Vx=200 V. A d-axis inductance of the motor is Ld. A flux linkage of the motor is ?. A maximum output of the motor in a device where the motor is mounted is Pmax. The controller has a control mode in which an effective value voltage higher than Vx is applied to the motor.

Abstract: A controller for controlling a charging current to a lithium-ion secondary battery controls the charging current so that lithium expected to dissolve after a stop of charging is permitted to deposit on an anode of the lithium-ion secondary battery. For example, the controller controls the charging current so that the charging current does not exceed a predetermined upper limit value. If a predetermined permission condition is satisfied, the controller permits the lithium expected to dissolve after the stop of charging to deposit on the anode of the lithium-ion secondary battery by permitting the upper limit value to become larger than a Li deposition limit value in a predetermined permission period.

Abstract: A system that reduces the possibility of damaging items. A route searching system includes a type-of-item obtaining part that obtains a type of an item transported by a vehicle; a destination obtaining part that obtains a destination; and a route searching part that searches for a route that reaches the destination by selecting, based on the type of an item, a road with a low possibility of damaging the item on a priority basis over a road with a high possibility of damaging the item.

Abstract: A controller for controlling a charging current to a lithium-ion secondary battery controls the charging current so that lithium expected to dissolve after a stop of charging is permitted to deposit on an anode of the lithium-ion secondary battery. For example, the controller controls the charging current so that the charging current does not exceed a predetermined upper limit value. If a predetermined permission condition is satisfied, the controller permits the lithium expected to dissolve after the stop of charging to deposit on the anode of the lithium-ion secondary battery by permitting the upper limit value to become larger than a Li deposition limit value in a predetermined permission period.

Abstract: A route searching system, a route searching method, and computer program are provided that enable selection of an appropriate recommended route for a user in consideration of interruption of automated driving control.