Fanuc Corporation

Nobuo Hirayama

Taku Sasaki

Kunio Tsuchida

Kiichi Inaba

Kenichi Okuaki

An object is to provide a numerical controller and a device included in an industrial machine which manage a control program in the device included in the industrial machine and can reduce the operational burden during the updating of the control programs related to the device. A numerical controller which is connected to a motor drive device so as to be able to communicate therewith and which controls the motor drive device, includes: a program management storage unit which stores a control program that is written into the motor drive device and is executable; a program writing unit which writes the control program stored in the program management storage unit; a data acquisition portion which acquires from the motor drive device a control program that is already stored in the motor drive device; and a storage control unit which stores the acquired control program in the program management storage unit.

Numerical controller and device included in industrial machine

A motor driving apparatus includes an amplifier receiving, from a detector, a sine wave shaped signal detected in response to rotation of a motor, and amplifying the signal with a set amplification factor, an A/D converter for performing digital conversion by sampling the signal amplified by the amplifier at a sampling timing in a predetermined cycle, an amplification factor setting part for changing setting of the amplification factor of the amplifier, and an amplification factor set timing command part for issuing a command with respect to a timing for changing the setting of the amplification factor by the amplification factor setting part. The amplification factor set timing command part issues the command with respect to the timing so that a waveform stabilizing period until distortion in a waveform of the signal occurring when the amplification factor setting part changes the setting is stabilized does not overlap with the sampling timing.

Motor driving apparatus

To provide a motor driving apparatus capable of obtaining high detection resolution irrespective of whether a frequency of a signal from a detector is high or low. A motor driving apparatus for driving a motor includes an amplifier circuit for receiving a signal from a detector for outputting information including a position and a speed of the motor as the signal, and amplifying the received signal with a set amplification factor, a frequency detecting part for detecting a frequency of the signal, and an amplification factor setting part for changing setting of the amplification factor of the amplifier circuit according to the frequency detected by the frequency detecting part.

A motor driving apparatus includes a motor driving unit for converting DC voltage on a DC link into AC voltage when a switching device is turned on/off and outputting the AC voltage to an AC motor side, a gate driving circuit for turning on/off the switching device, a gate driving command generation unit for outputting either one of an ON command and an OFF command to the gate driving circuit, and an overcurrent detection unit for detecting an overcurrent with respect to a DC link current or an alternating current on the AC motor side, wherein, when the overcurrent detection unit detects the overcurrent, the gate driving command generation unit alternately outputs the ON command and the OFF command while gradually increasing a ratio of the OFF command to the ON command and ultimately outputs only the OFF command.

Motor driving apparatus including overcurrent detection unit

A motor driving device comprises a first heat sink arranged outside a housing, a second heat sink arranged inside the housing, and a heat conduction plate configured to thermally connect the first heat sink and the second heat sink. A switching element for a spindle is mounted on the first heat sink, and a switching element for a feed axis is mounted on the second heat sink.

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Yamanashi, Japan

Nobuo Hirayama