Abstract: Provided is a magnetic pole position detection device with which it is possible to shorten the detection time of the initial magnetic pole position of the rotor of a synchronous motor.

Abstract: A motor control device is equipped with a command receiving unit adapted to receive a movement command and a first control period of the movement command from a numerical controller, a command generating unit which, on the basis of the first control period and a second control period which is determined in advance, is adapted to generate a movement command of the second control period from the movement command of the first control period, and a motor control unit adapted to control a motor, in accordance with the movement command generated by the command generating unit.

Abstract: A motor control device includes: a polarity sensor configured to detect whether a magnetic pole position in a synchronous motor resides on a positive polarity side or a negative polarity side with reference to a reference position; a motor control unit configured to turn the synchronous motor from the polarity side detected by the polarity sensor toward an opposite polarity side through the reference position; and a magnetic pole position determination unit configured to determine, as the magnetic pole position, a position of the synchronous motor at the moment when the polarity changes, based on a detection result of the polarity sensor.

Abstract: A motor control device is equipped with a command receiving unit adapted to receive movement commands and first control periods of the movement commands from each of a plurality of numerical controllers, a command generating unit which, on the basis of the plurality of first control periods and a plurality of second control periods in accordance with each of the plurality of first control periods, is adapted to generate movement commands of the plurality of second control periods from the movement commands of the plurality of first control periods, and a motor control unit adapted to control a motor in accordance with the plurality of movement commands generated by the command generating unit.

Abstract: To provide a motor controller and a motor control method allowing inspection for checking the presence or absence of specification error in motor winding to be conducted more simply, efficiently, and with high accuracy. A voltage command value as a command value for driving control of a motor and an excitation frequency are sampled. An actual current flowing in the motor being driven under control is detected. Theoretical values of a voltage command value, a current, and an excitation frequency are determined from a parameter for driving the motor and a condition at the time of driving. The theoretical values of the voltage command value, the current, and the excitation frequency are compared with the values of the voltage command value, the current, and the excitation frequency respectively at the time of the driving, and it is determined that there is winding abnormality if differences between the comparable values exceed a threshold range set in advance.

Abstract: A motor control device includes: a polarity sensor configured to detect whether a magnetic pole position in a synchronous motor resides on a positive polarity side or a negative polarity side with reference to a reference position; a motor control unit configured to turn the synchronous motor from the polarity side detected by the polarity sensor toward an opposite polarity side through the reference position; and a magnetic pole position determination unit configured to determine, as the magnetic pole position, a position of the synchronous motor at the moment when the polarity changes, based on a detection result of the polarity sensor.

Abstract: A motor control device is equipped with a command receiving unit adapted to receive a movement command and a first control period of the movement command from a numerical controller, a command generating unit which, on the basis of the first control period and a second control period which is determined in advance, is adapted to generate a movement command of the second control period from the movement command of the first control period, and a motor control unit adapted to control a motor, in accordance with the movement command generated by the command generating unit.

Abstract: A motor control device is equipped with a command receiving unit adapted to receive movement commands and first control periods of the movement commands from each of a plurality of numerical controllers, a command generating unit which, on the basis of the plurality of first control periods and a plurality of second control periods in accordance with each of the plurality of first control periods, is adapted to generate movement commands of the plurality of second control periods from the movement commands of the plurality of first control periods, and a motor control unit adapted to control a motor in accordance with the plurality of movement commands generated by the command generating unit.

Abstract: A motor controller, a motor control method, and a motor control program are provided, all of which are capable of appropriately suppressing temperature elevation in a motor, while protecting an amplifier. A motor controller for driving a motor by way of pulse width modulation includes: a temperature acquisition unit that acquires a temperature of a motor; a limiting value determination unit that determines, based on the temperature, a limiting current value for driving the motor; and a frequency determination unit that determines, based on the limiting value, a PWM frequency to be generated with an amplifier.

Abstract: A motor control device includes a current command calculation unit configured to calculate a current command value for driving a motor, a current detection unit configured to detect a value of a current that flows through a power line of the motor, a current deviation calculation unit configured to calculate a current deviation, which is a difference between the current command value and the detected current value, a voltage command calculation unit configured to calculate a voltage command value applied to the motor based on the current deviation, a filter processing unit configured to calculate data by filtering the current deviation, the absolute value of the current deviation, or the power of the current deviation and to output the data as index data, and a power line breakage detection unit configured to detect a breakage of the power line based on the index data.

Abstract: A machine learning apparatus configured to learn conditions to be associated with an excitation current command for a motor and excitation start timing provided by a motor control apparatus includes: a state observation unit that observes a state variable including at least one of data relating to magnetic flux increase lead time that may be required from timing when a start command is issued for a predetermined operation mode until the magnetic flux of the motor reaches the maximum magnetic flux corresponding to the predetermined operation mode and data relating to whether an overheat alarm indicating that the motor has overheated has been triggered or not; and a learning unit that learns conditions to be associated with an excitation current command increment and an excitation start timing adjusting amount in accordance with a training data set composed of the state variable.

Abstract: A motor controller, a motor control method, and a motor control program are provided, all of which are capable of appropriately suppressing temperature elevation in a motor, while protecting an amplifier. A motor controller for driving a motor by way of pulse width modulation includes: a temperature acquisition unit that acquires a temperature of a motor; a limiting value determination unit that determines, based on the temperature, a limiting current value for driving the motor; and a frequency determination unit that determines, based on the limiting value, a PWM frequency to be generated with an amplifier.

Abstract: A machine learning apparatus configured to learn conditions to be associated with an excitation current command for a motor and excitation start timing provided by a motor control apparatus includes: a state observation unit that observes a state variable including at least one of data relating to magnetic flux increase lead time that may be required from timing when a start command is issued for a predetermined operation mode until the magnetic flux of the motor reaches the maximum magnetic flux corresponding to the predetermined operation mode and data relating to whether an overheat alarm indicating that the motor has overheated has been triggered or not; and a learning unit that learns conditions to be associated with an excitation current command increment and an excitation start timing adjusting amount in accordance with a training data set composed of the state variable.

Abstract: A control device for a machine tool including a motor for driving a spindle includes: a current detection unit that detects a current driving the motor; a storage unit that stores overheat temperature specified for the motor; a temperature detection unit that detects temperature of the motor; a time estimation unit that estimates, by using the temperature detected by the temperature detection unit and the overheat temperature, time from when present estimation takes place until the motor reaches the overheat temperature, under a condition in which the current detected by the current detection unit continuously passes through the motor; and a provision unit that provides the time estimated by the time estimation unit.

Abstract: A motor controller includes: a converter for converting an alternating current to a direct current; a first inverter for converting the direct current in a direct-current link of the converter to an alternating current for driving a first motor; a second inverter for converting the direct current in the direct-current link to an alternating current for driving a second motor; a power-failure detection unit for detecting a power failure on the side with the alternating-current power supply; and a command creation unit for creating a drive command for each of the first inverter and the second inverter when no power failure has occurred, while creating a drive command for the first inverter and also creating a drive command for the second inverter by using position feedback information of the first motor driven according to the drive command for the first inverter, when a power failure has occurred.

Abstract: A motor control device includes a current command calculation unit configured to calculate a current command value for driving a motor, a current detection unit configured to detect a value of a current that flows through a power line of the motor, a current deviation calculation unit configured to calculate a current deviation, which is a difference between the current command value and the detected current value, a voltage command calculation unit configured to calculate a voltage command value applied to the motor based on the current deviation, a filter processing unit configured to calculate data by filtering the current deviation, the absolute value of the current deviation, or the power of the current deviation and to output the data as index data, and a power line breakage detection unit configured to detect a breakage of the power line based on the index data.

Abstract: A motor controller includes: a converter for converting an alternating current to a direct current; a first inverter for converting the direct current in a direct-current link of the converter to an alternating current for driving a first motor; a second inverter for converting the direct current in the direct-current link to an alternating current for driving a second motor; a power-failure detection unit for detecting a power failure on the side with the alternating-current power supply; and a command creation unit for creating a drive command for each of the first inverter and the second inverter when no power failure has occurred, while creating a drive command for the first inverter and also creating a drive command for the second inverter by using position feedback information of the first motor driven according to the drive command for the first inverter, when a power failure has occurred.

Abstract: A control device for a machine tool including a motor for driving a spindle includes: a current detection unit that detects a current driving the motor; a storage unit that stores overheat temperature specified for the motor; a temperature detection unit that detects temperature of the motor; a time estimation unit that estimates, by using the temperature detected by the temperature detection unit and the overheat temperature, time from when present estimation takes place until the motor reaches the overheat temperature, under a condition in which the current detected by the current detection unit continuously passes through the motor; and a provision unit that provides the time estimated by the time estimation unit.

Abstract: A sensorless induction motor control device with a function of correcting a slip frequency wherein a slip frequency estimation unit estimates the slip frequency from at least one kind of current flowing through the motor. A voltage command value calculation unit calculates a D-phase voltage command value and a Q-phase voltage command value which are used for controlling a voltage applied to the motor using a Q-phase current command value calculated based on a difference between a speed estimation value, which is calculated using an estimation value of the slip frequency, and an externally supplied speed command value. An ideal voltage command value determination unit determines an ideal voltage command value using the speed command value and the Q-phase current command value. An actual voltage command value calculation unit calculates an actual voltage command value using the D-phase voltage command value and the Q-phase voltage command value.

Abstract: A sensorless induction motor control device with a function of correcting a slip frequency wherein a slip frequency estimation unit estimates the slip frequency from at least one kind of current flowing through windings included in the motor, a voltage command signal value calculation unit calculates a D-phase voltage command signal value and a Q-phase voltage command signal value which are used for controlling a voltage applied to the sensorless induction motor using a Q-phase current command signal value calculated based on a difference between a speed estimation value, which is calculated using an estimation value of the slip frequency, and an externally supplied speed command signal value, an ideal voltage command signal value determination unit determines an ideal voltage command signal value using the speed command signal value and the Q-phase current command signal value, an actual voltage command signal value calculation unit calculates an actual voltage command signal value using the D-phase voltage