Abstract: A motor driving control apparatus for a motor-assisted vehicle such as a motor-assisted bicycle includes: an inverter configured to drive a motor; and a controller configured to control the inverter to start regeneration after lapse of a first time period since a second predetermined time period elapsed or gradually increase a regeneration amount, when a state that an acceleration of a vehicle on which the motor is embodied is negative and equal to or less than a first predetermined value continues for the second predetermined time period.

Abstract: An embodiment of this invention relates to a motor driving control apparatus for a moto-assisted vehicle, which includes a driving unit configured to drive a motor, and a controller configured to determine a regeneration amount based on a first speed of a vehicle that moves by the motor driven by the driving unit, and control the driving unit according to the regeneration amount, wherein the first speed is a speed at a first timing when it is detected that a brake of the vehicle is changed to OFF, or is determined based on temporal change in an acceleration of the vehicle.

Abstract: A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.

Abstract: An embodiment of this invention relates to a motor driving control apparatus for a moto-assisted vehicle, which includes a driving unit configured to drive a motor, and a controller configured to determine a regeneration amount based on a first speed of a vehicle that moves by the motor driven by the driving unit, and control the driving unit according to the regeneration amount, wherein the first speed is a speed at a first timing when it is detected that a brake of the vehicle is changed to OFF, or is determined based on temporal change in an acceleration of the vehicle.

Abstract: A motor driving control apparatus for a motor-assisted vehicle such as a motor-assisted bicycle includes: an inverter configured to drive a motor; and a controller configured to control the inverter to start regeneration after lapse of a first time period since a second predetermined time period elapsed or gradually increase a regeneration amount, when a state that an acceleration of a vehicle on which the motor is embodied is negative and equal to or less than a first predetermined value continues for the second predetermined time period.

Abstract: A motor driving apparatus includes a driving unit configured to drive a motor according to a torque inputted by a rotation input from a human being; and a controller configured to control driving of the driving unit according to a relationship between an accumulated value of first amounts that correspond to the rotation input from the human being and an accumulated value of second amounts that correspond to rotation of a rotating object driven by the motor. The controller may be further configured to cause the driving unit to suppress driving of the motor when an accumulated difference that is calculated by subtracting the accumulated value of the second amounts from the accumulated value of the first amounts is equal to or less than a predetermined threshold.

Abstract: A driving control apparatus includes a controller that generates a first signal for controlling turn-on to a brushless motor, a PWM signal generator that generates a PWM signal for driving the brushless motor by continuous turn-on with a sine wave, and an inverter that supplies a driving voltage generated based on the first signal and the PWM signal for the brushless motor. The controller generates the first signal so that a turn-on section represented by the first signal continuously increases from a reference turn-on angle according to increase of a rotation speed, and the turn-on section having an angle corresponding to the continuous turn-on is kept when the rotation speed is equal to or greater than a predetermined speed. The PWM signal generator outputs the PWM signal in a range including a rotation speed at which the turn-on section begins to increase from the reference turn-on angle and more.

Abstract: A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.

Abstract: A motor driving apparatus includes a driving unit configured to drive a motor according to a torque inputted by a rotation input from a human being; and a controller configured to control driving of the driving unit according to a relationship between an accumulated value of first amounts that correspond to the rotation input from the human being and an accumulated value of second amounts that correspond to rotation of a rotating object driven by the motor. The controller may be further configured to cause the driving unit to suppress driving of the motor when an accumulated difference that is calculated by subtracting the accumulated value of the second amounts from the accumulated value of the first amounts is equal to or less than a predetermined threshold.

Abstract: A motor drive control device of an electric power-assisted vehicle that has a gear shifter and a motor, and in which a first ratio of the number of drive rotations in the motor to the number of drive rotations of a pedal changes based on changes in a gear ratio in the gear shifter, includes: a gear ratio obtaining part that obtains the gear ratio of the gear shifter; and a calculating part that calculates an assist torque, which is a target value for a drive torque of the motor, from the pedal input torque based on the gear ratio obtained by the gear ratio obtaining part.

Abstract: A controller for driving a motor in a motor driven vehicle, provided with: a detection part, a control coefficient computing part, and a control part. The control coefficient computing part identifies, as a first vehicle speed, the speed of the vehicle when the detection part detects a start signal for regeneration control, the control coefficient computing part assigning a prescribed value to a control coefficient that determines a value of a control parameter that controls the motor relative to a target value of the control parameter. The target value is a value of the control parameter at which the motor achieves a desired power generation efficiency, and the control coefficient computing part increases the control coefficient if a current vehicle speed becomes faster than the first vehicle speed, and decreases the control coefficient if the current vehicle speed becomes slower than the first vehicle speed.

Abstract: A controller for driving a motor in a motor driven vehicle, provided with: a detection part, a control coefficient computing part, and a control part. The control coefficient computing part identifies, as a first vehicle speed, the speed of the vehicle when the detection part detects a start signal for regeneration control, the control coefficient computing part assigning a prescribed value to a control coefficient that determines a value of a control parameter that controls the motor relative to a target value of the control parameter. The target value is a value of the control parameter at which the motor achieves a desired power generation efficiency, and the control coefficient computing part increases the control coefficient if a current vehicle speed becomes faster than the first vehicle speed, and decreases the control coefficient if the current vehicle speed becomes slower than the first vehicle speed.

Abstract: A motor drive control device of an electric power-assisted vehicle that has a gear shifter and a motor, and in which a first ratio of the number of drive rotations in the motor to the number of drive rotations of a pedal changes based on changes in a gear ratio in the gear shifter, includes: a gear ratio obtaining part that obtains the gear ratio of the gear shifter; and a calculating part that calculates an assist torque, which is a target value for a drive torque of the motor, from the pedal input torque based on the gear ratio obtained by the gear ratio obtaining part.

Abstract: Dusts containing zinc and/or lead in the form of oxides and one or more reducing agents are mixed with each other before or after being introduced into a heat treatment furnace. The mixture is heated to a given temperature range under a substantial vacuum so that the zinc and/or lead in the form of oxides are reduced to zinc and/or lead in the state of pure metals and evaporated in the furnace. The evaporated zinc and/or lead are introduced into a retrieving container also under a substantial vacuum and at a given temperature where the evaporated zinc and/or lead pure metals are condensed and retrieved.

Abstract: In a casting process using a resin core, sometimes molten resin remains in a cast product after the steps of withdrawal of the resin core from the cast product. In order to solve the problem, as a material of the resin core, a resin which is hard and not deformed against high temperature and high pressure of molten metal until the molten metal is solidified and is softened with an increase of temperature beyond the temperature at which the metal is solidified is used. The resin core is withdrawn from the cast product after it is softened but before it is melted. The softened core is pulled out from the cast product without being broken apart.