Mitsubishi Electric Corporation

Munehiro Murata

Akira Tanabe

A numerical control device includes: an estimation unit to estimate an accumulation amount of swarf to be produced when a tool mounted on a machine tool cuts a workpiece on the basis of a machining condition in cutting the workpiece by the tool and a value of current to be applied to a motor for moving a shaft of the machine tool when the tool cuts the workpiece. The numerical control device further includes a correction unit to correct the accumulation amount of swarf estimated by the estimation unit on the basis of a machining mode specifying a shape of swarf to be produced when the tool cuts the workpiece.

Numerical control device

A motor control apparatus is an apparatus that controls a motor that drives a machine apparatus that moves a subject to be moved, and includes a resolution conversion unit that converts, on the basis of a ratio of resolution of a first detector that detects a position of an object and resolution of a second detector that detects a position of the object, a detection signal that indicates the position of the object that is detected by the second detector to a signal of the resolution of the first detector. The motor control apparatus further includes a current control unit that controls a voltage to be applied to the motor on the basis of a command signal that specifies a destination position of the subject to be moved and the signal obtained by the conversion performed by the resolution conversion unit on the detection signal.

Motor control apparatus

A magnetic pole position detection device of a motor control device includes a calculation unit to estimate a magnetic pole position. The calculation unit generates a voltage pulse command for three-phase connection to actuate all of three legs included in an inverter, and a voltage pulse command for one phase opened to actuate only two of the three legs, and narrows down the estimation range on the basis of a first magnetic pole position estimated value estimated on the basis of a motor current that flows during application of the voltage pulse command for three-phase connection, and a second magnetic pole position estimated value estimated on the basis of a motor current that flows during application of the voltage pulse command for one phase opened.

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Tokyo, Japan

Munehiro Murata