Abstract: An optimal calculation method of an energy operating condition in an iron mill includes calculating, using a total energy operation cost of the iron mill within a predetermined period of time from a current time as an evaluation function, an operation condition of an energy facility in the iron mill as a decision variable such that a value of the evaluation function decreases, at each predetermined time within the predetermined period of time, based on actual values and estimated values of a generation amount and a used amount of energy utility for each of factories comprised in the iron mill. The method includes a step of calculating the decision variable by imposing an equality constraint such that the decision variable related to a power generation facility included in the energy facility is constant within a predetermined aggregation time.

Abstract: A hybrid vehicle includes: a power generation device including an engine and an electric motor; an electrical storage device configured to exchange electric power with the electric motor; a shift device configured to allow a driver to perform a shift operation for deceleration; and an electronic control unit configured to control the power generation device such that an integral value of braking torque that is output from the power generation device during a period from when depression of an accelerator pedal is released and the shift operation is performed to when a predetermined time elapses in the case where a drive mode is a charge depleting mode is larger than the integral value in the case where the drive mode is a charge sustaining mode.

Abstract: When an accelerator operating speed is greater than a quick depression threshold value, a start threshold value is set to a value that is smaller than a selection threshold value between a single-drive mode and a double-drive mode in an EV drive mode. Then, when a required torque becomes greater than the start threshold value, an engine is started.

Abstract: When there is a history that a required torque has reached a high torque range and the required torque falls within a low torque range, a start threshold is changed from a value larger than a maximum double-drive torque to a value smaller than a selection threshold for selecting a single-drive mode or a double-drive mode. When the required torque becomes larger than the start threshold, an engine is started.

Abstract: Transition is made from a motor single-drive mode to a motor dual-drive mode while there is a margin in torque output from a motor MG2 with respect to rated torque. With this, the torque of the motor MG1 is changed slowly in the motor dual-drive mode, whereby it is possible to suppress the generation of vibration (shock) due to torsion of a damper and to compensate for a shortage of the torque of the motor MG1 due to slow change processing with an increase in torque from the motor MG2. As a result, it is possible to achieve both of reduction of a shock due to the torque of the motor MG1 and output of required torque to a drive shaft.

Abstract: When an output limitation value of a battery is equal to or less than a threshold, an electronic control unit determines that basic torque is able to be output from a second motor to a drive shaft. Then, the electronic control unit sets a predetermined value as a target motoring rotation speed for ending motoring of an engine by a first motor. When the output limitation value is greater than the threshold, the electronic control unit determines that the basic torque is unable to be output from the second motor to the drive shaft at the time of starting the engine, and sets a value smaller than the predetermined value as the target motoring rotation speed.

Abstract: A hybrid vehicle includes: a power generation device including an engine and an electric motor; an electrical storage device configured to exchange electric power with the electric motor; a shift device configured to allow a driver to perform a shift operation for deceleration; and an electronic control unit configured to control the power generation device such that an integral value of braking torque that is output from the power generation device during a period from when depression of an accelerator pedal is released and the shift operation is performed to when a predetermined time elapses in the case where a drive mode is a charge depleting mode is larger than the integral value in the case where the drive mode is a charge sustaining mode.

Abstract: When an output limitation value of a battery is equal to or less than a threshold, an electronic control unit determines that basic torque is able to be output from a second motor to a drive shaft. Then, the electronic control unit sets a predetermined value as a target motoring rotation speed for ending motoring of an engine by a first motor. When the output limitation value is greater than the threshold, the electronic control unit determines that the basic torque is unable to be output from the second motor to the drive shaft at the time of starting the engine, and sets a value smaller than the predetermined value as the target motoring rotation speed.

Abstract: Transition is made from a motor single-drive mode to a motor dual-drive mode while there is a margin in torque output from a motor MG2 with respect to rated torque. With this, the torque of the motor MG1 is changed slowly in the motor dual-drive mode, whereby it is possible to suppress the generation of vibration (shock) due to torsion of a damper and to compensate for a shortage of the torque of the motor MG1 due to slow change processing with an increase in torque from the motor MG2. As a result, it is possible to achieve both of reduction of a shock due to the torque of the motor MG1 and output of required torque to a drive shaft.

Abstract: When an accelerator operating speed is greater than a quick depression threshold value, a start threshold value is set to a value that is smaller than a selection threshold value between a single-drive mode and a double-drive mode in an EV drive mode. Then, when a required torque becomes greater than the start threshold value, an engine is started.

Abstract: When there is a history that a required torque has reached a high torque range and the required torque falls within a low torque range, a start threshold is changed from a value larger than a maximum double-drive torque to a value smaller than a selection threshold for selecting a single-drive mode or a double-drive mode. When the required torque becomes larger than the start threshold, an engine is started.

Abstract: When sub-field magnets 8a and 8b are not provided, the magnetic fluxes that pass through main field magnets 7a and 7b respectively and interlink with stator windings 5 and first rotor windings 6, and the magnetic fluxes that pass through the main field magnets 7a and 7b respectively and short-circuit adjacent main field magnets 7b? and 7a? are generated. The short-circuited magnetic fluxes do not contribute to torque generation, therefore a favorable inner periphery magnetic circuit is not formed, and the torque received between a second rotor 4 and a first rotor 3 becomes small. When sub-field magnets 8a and 8b are provided, on the other hand, the short-circuited magnet fluxes interlink with the first rotor windings 6 by the sub-field magnets 8a and 8b, and an inner periphery magnetic circuit is formed, whereby the motor driving torque received between the second rotor 4 and the first rotor 3 increases.

Abstract: An engine is started to meet the driver's benefit in a vehicle control device for executing a control for starting the engine automatically if the engine has not been started for a predetermined period. The vehicle control device 10 stores the date when the engine (internal combustion engine) was last started (internal combustion engine start date). The vehicle control device 10 starts the engine 40 automatically upon movement of the vehicle after five weeks (first period) have elapsed from the internal combustion engine start date.

Abstract: A slip ring structure for facilitating an adjusting operation after assembling is provided. A slip ring structure 20 comprises slip rings 30U, 30V and 30W respectively provided to be rotatable about a common axis. The slip ring structure 20 comprises bus bars 40U, 40V and 40W connected to the slip rings 30U, 30V and 30W of the respective phases and extending in the axial direction. In at least one position in the axial direction, one of the bus bars, which has a shorter length in the axial direction, has a greater area in a cross section perpendicular to the axis.

Abstract: A rotating electric machine comprises: a rotating shaft; and a rotor which includes a conductor capable of generating a rotating magnetic field and is provided on a peripheral surface of the rotating shaft so as to be rotatable integrally therewith. The rotating shaft includes: an oil supply passage passing within the rotating shaft; and an oil supply hole which extends from the oil supply passage to the peripheral surface of the rotating shaft and opens opposite to the rotor. The rotor includes an oil passage which is disposed so as to face the peripheral surface of the rotating shaft and which communicates with the oil supply hole.

Abstract: A vehicle drive mechanism comprises an engine and a double rotor motor as sources of motive power. The engine generates motive power by internally burning gasoline fuel. The dual rotor motor is operated by three-phase AC electric power. A control unit controls first and second inverters so as to generate first and second electromotive torque between a first rotor and a second rotor and between a stator and the second rotor respectively, and the control unit also fixes with a disk brake the drive shaft and the first rotor which rotates integrally with the drive shaft, so as to not be rotatable.

Abstract: To provide an ebullient cooling device that can prevent the freezing of liquid cooling medium, and which can inhibit the occurrence of burnout. An ebullient cooling device according to the present invention is characterized in that: it comprises an accommodating unit in which a liquid cooling medium is accommodated, the liquid cooling medium receiving heat that results from a heating element; the liquid cooling medium is a mixed liquid comprising at least two types of liquids whose boiling points differ; the accommodating unit has: a heat-transferring wall portion that conveys the heat of the heating element to the liquid cooling medium; and a facing wall portion that faces the heat-transferring wall portion by way of the liquid cooling medium; and a separation distance between the heat-transferring wall portion and the facing wall portion is 3 mm or less.

Abstract: Provided is an ebullient cooling device that can prevent the freezing of liquid cooling medium, and which can inhibit the occurrence of burnout. An ebullient cooling device includes an accommodating unit in which a liquid cooling medium is accommodated, the liquid cooling medium receiving heat that results from a heating element and is an ebullient cooling device to be installed in vehicle, wherein the liquid cooling medium is a mixed liquid of water and ethanol, and the mixed liquid has an ethanol concentration of 40% by mass or more.

Abstract: The production yield about defect free devices is improved by so controlling the size and density of void defects that they are under predetermined levels without marring the productivity. The pull-up speed V of a silicon crystal (10) by a pull-up mechanism (4) is controlled, and the rate of cooling by a cooler (30) is also controlled. As a result, the axial temperature gradient G1 at and near the melting point of the silicon crystal (10) is increased. The growth condition V/G1 is lowered to a temperature near the critical value under the condition that the growth rate V lies in the range from 97% to 75% of the limit rate Vmax and that the solid-liquid interface is convex with respect to the melt surface. Thus a silicon crystal (10) is grown by pulling up.