Abstract: Provided is cam curve generating device that generates a cam curve that is smoothly connected to an out-section cam curve and reduces fluctuations in speed of a driven shaft and acceleration of the driven shaft. Cam curve generating device includes section divider that divides an application section into a plurality of sub-sections, and cam curve generator that generates a cam curve in the application section. The division condition includes a length and the type of each of the plurality of sub-sections. The boundary condition includes a position, speed, and acceleration of the driven shaft at each of a start and an end of the application section. Cam curve generator generates a cam curve that allows a position of the driven shaft, speed of the driven shaft, and acceleration of the driven shaft to be continuous at each of boundaries of the plurality of sub-sections.

Abstract: A motor control device controls a current of a motor based on a torque command, the current being separated into a d-axis current and a q-axis current orthogonal to the d-axis current, the torque command being a target value of a torque of the motor.

Abstract: A motor control device controls a current of a motor based on a torque command, the current being separated into a d-axis current and a q-axis current orthogonal to the d-axis current, the torque command being a target value of a torque of the motor.

Abstract: A motor control device which controls a motor for driving a blower unit, comprises: a target motor output calculating section which calculates a target motor output which causes an air flow of air supplied from the blower unit to coincide with a target air flow; and an operation command generating section which obtains the motor output of the motor, and generates a command for controlling a physical amount of the motor such that the motor output coincides with the target motor output based on a result of comparison between the motor output and the target motor output; and the target motor output calculating section is configured to calculate the target motor output as a product of a polynomial of variables derived by dividing the target air flow by the motor speed, and a cube of the motor speed.

Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.

Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.

Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.

Abstract: A motor controller of the present invention comprises units which obtain information indicative of a motor speed (?) and information indicative of motor torque (T), an air flow calculation section which calculates an air flow (Q) of a fan based on the motor speed (?) and the motor torque (T); and a speed command generation section which generates a speed command (?*) of a motor such that the air flow (Q) coincides with the predetermined air flow command (Q*).

Abstract: A motor controller of the present invention comprises units which obtain information indicative of a motor speed (?) and information indicative of motor torque (T), an air flow calculation section which calculates an air flow (Q) of a fan based on the motor speed (?) and the motor torque (T); and a speed command generation section which generates a speed command (?*) of a motor such that the air flow (Q) coincides with the predetermined air flow command (Q*).

Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.

Abstract: A motor control device which controls a motor for driving a blower unit, comprises a torque command generating section which obtains a motor speed of the motor and generates a torque command which causes an air flow of air supplied from the blower unit to coincide with a target air flow; wherein the torque command generating section is configured to calculate the torque command as a product of a polynomial of variables derived by dividing the target air flow by the motor speed, and a square of the motor speed.

Abstract: A motor control device according to the present invention is a device for controlling a motor driving an air blower. The motor control device includes: an air flow rate calculator configured to calculate an air flow rate supplied by the air blower; and a torque command generator configured to multiply a motor torque by a square of a ratio of a target air flow rate to the air flow rate or multiply a previously outputted torque command by the square of the ratio of the target air flow rate to the air flow rate, and generate a result of the multiplication as a torque command.

Abstract: An electric motor control device includes a current vector controller that follows a target command value for controlling an electric current of the motor by separating the current into a d-axis current and q-axis current orthogonal to each other. The motor control device further includes a driver for driving the motor, a phase-angle generator a phase-angle command generator for generating a phase-angle command ?* based on difference ?v* between an absolute value |v*| of a voltage command supplied from the current vector controller to the driver and a given reference value Vlmt, a d-axis current command generator for generating d-axis current command id* based on a sine value of the phase-angle command ?*, and a q-axis current limiter for setting a limit value of q-axis current command iq* based on a cosine value of the phase-angle command ?*.

Abstract: A motor control device which controls a motor for driving a blower unit, comprises: a target motor output calculating section which calculates a target motor output which causes an air flow of air supplied from the blower unit to coincide with a target air flow; and an operation command generating section which obtains the motor output of the motor, and generates a command for controlling a physical amount of the motor such that the motor output coincides with the target motor output based on a result of comparison between the motor output and the target motor output; and the target motor output calculating section is configured to calculate the target motor output as a product of a polynomial of variables derived by dividing the target air flow by the motor speed, and a cube of the motor speed.

Abstract: A motor control device which controls a motor for driving a blower unit, comprises a torque command generating section which obtains a motor speed of the motor and generates a torque command which causes an air flow of air supplied from the blower unit to coincide with a target air flow; wherein the torque command generating section is configured to calculate the torque command as a product of a polynomial of variables derived by dividing the target air flow by the motor speed, and a square of the motor speed.

Abstract: A motor control device according to the present invention is a device for controlling a motor driving an air blower. The motor control device includes: an air flow rate calculator configured to calculate an air flow rate supplied by the air blower; and a torque command generator configured to multiply a motor torque by a square of a ratio of a target air flow rate to the air flow rate or multiply a previously outputted torque command by the square of the ratio of the target air flow rate to the air flow rate, and generate a result of the multiplication as a torque command.

Abstract: A motor control device according to the present invention includes a motor driving unit for driving a motor, a current vector controller, a magnetic-flux weakening current command generator, and one of a target command limiter and a q-axis current command limiter. The current vector controller controls a current of the motor by separating the current into a d-axis current and a q-axis current orthogonal to each other, in accordance with a target command value from the outside. The magnetic-flux weakening current command generator generates a d-axis current command to control the amount of the d-axis current, based on one of differences, i.e. a difference between a first predetermined reference value and the absolute value of a voltage command from the current vector controller to the motor driving unit and a difference between a second predetermined reference value and a q-axis component of the voltage command.

Abstract: A motor controller of the present invention comprises units which obtain information indicative of a motor speed (?) and information indicative of motor torque (T), an air flow calculation section which calculates an air flow (Q) of a fan based on the motor speed (?) and the motor torque (T); and a speed command generation section which generates a speed command (?*) of a motor such that the air flow (Q) coincides with the predetermined air flow command (Q*).

Abstract: A phase-shift detection circuit detects a phase shift in motor driving, using pulse-shaped position detection signal Rd and measurement signal Ms. The position detection signal is based on sensor signal Hs from a position sensor disposed in a motor. The measurement signal is based on the induced voltage from windings. The phase-shift detection circuit includes a level difference calculator and a phase-shift calculator. The level difference calculator calculates a level difference between the level of measurement signal Ms at a rising timing of position detection signal Rd and the level of measurement signal Ms at a falling timing thereof. The phase-shift calculator calculates the amount of phase shifts based on the level difference.

Abstract: An electric motor control device includes a current vector controller that follows a target command value for controlling an electric current of the motor by separating the current into a d-axis current and q-axis current orthogonal to each other. The motor control device further includes a driver for driving the motor, a phase-angle generator a phase-angle command generator for generating a phase-angle command ?* based on difference ?v* between an absolute value |v*| of a voltage command supplied from the current vector controller to the driver and a given reference value V1mt, a d-axis current command generator for generating d-axis current command id* based on a sine value of the phase-angle command ?*, and a q-axis current limiter for setting a limit value of q-axis current command iq* based on a cosine value of the phase-angle command ?*.