Fanuc Corporation

Norihiro Chou

Kiichi Inaba

Youichirou Ooi

Yasuyuki Matsumoto

A motor controller includes a motor drive unit configured to drive and control a motor, an electrical discharge control unit configured to perform control in which regenerative power from the motor is consumed by a regenerative power discharge resistor, and a housing formed to accommodate the motor drive unit and the electrical discharge control unit, wherein at least a part of the housing is configured as the regenerative power discharge resistor.

Motor controller

An amplifier selection device includes: a characteristic data storage configured to store a database including respective characteristic data of a plurality of motors, amplifiers, and common power sources; a motor selector configured to display a list of identification information of the motors and select a motor; an amplifier selector configured to display a list of identification information of the amplifiers and select an amplifier; a common power source selector configured to display a list of identification information of the common power sources and select a common power source; a display configured to display a combination of the motor, the amplifier, and the common power source; and a determiner configured to determine whether a relation of the characteristic data satisfies first and second conditions, and when at least one of the conditions is not satisfied, the display clarifies a combination which fails to satisfy the first or second condition.

Amplifier selection device, amplifier selection method, and computer readable medium having function of clarifying erroneous selection part

A motor driving device includes: a converter unit having a capacitor; a plurality of inverter units having a plurality of semiconductor switching elements and configured to convert a capacitor voltage across the capacitor into an AC voltage to drive a plurality of motors; a second switch configured to connect the negative-side terminal of the capacitor to ground; a first detector configured to detect a ground-referenced voltage; and a second detector configured to detect the capacitor voltage. The motor driving device controls the semiconductor switching elements to establish a measurement state for enabling measuring of the insulation resistance of a measurement target motor, estimates a convergence value of the ground-referenced voltage based on multiple measurements of the ground-referenced voltage detected by the first detector, and then calculates the insulation resistance based on the estimated convergence value and the capacitor voltage.

Motor driving device and measuring method

A motor driving device includes: a converter unit having a capacitor; a plurality of inverter units having a plurality of semiconductor switching elements and configured to convert a capacitor voltage across the capacitor into an AC voltage to drive a plurality of motors; a second switch configured to connect the negative-side terminal of the capacitor to ground; a first detector configured to detect a ground-referenced voltage; and a second detector configured to detect the capacitor voltage. The motor driving device controls the semiconductor switching elements to establish a measurement state for enabling measurement of an insulation resistance of a measurement target motor, determines that the ground-referenced voltage has converged when an amount of change in the waveform of the ground-referenced voltage detected by the first detector becomes equal to or lower than a threshold, and calculates the insulation resistance based on the ground-referenced voltage and the capacitor voltage.

A motor driving device includes: an insulation resistance measuring unit configured to measure insulation resistance of a motor selected as a measurement target to thereby measure the insulation resistance of each of the multiple motors; a measurement interrupting unit configured to interrupt measurement of insulation resistance if a measurement interrupt condition is established; a storage unit configured to store information indicating the motor selected as the measurement target at the time of interruption of the measurement of insulation resistance; and a measurement resuming unit configured to, when measurement is resumed, resume measurement of the insulation resistance sequentially from the motor that had been selected as the measurement target when the measurement was interrupted, based on the information stored in the storage unit.

A corrosion detection circuit according to an embodiment of the present invention includes an insulating board; a test chip having a corrodible metal, mounted on the surface of the insulating board; a plurality of resistors each having a higher resistance value than the test chip after a change due to an environment including contact with the test chip and the adhesion of dust to the test chip; and a voltage detection circuit for detecting the output voltage of a divided voltage output point, when a voltage is applied to the test chip and a voltage dividing circuit using the plurality of resistors. The voltage detection circuit detects a break in the test chip by corrosion based on a variation in the output voltage.

Corrosion detection circuit for circuit board and motor drive having the same

A controller that makes an electric motor efficiently operate in accordance with an ambient temperature. The controller includes a machine learning apparatus learning an operating command to the electric motor. The machine learning apparatus includes a status observing part and learning part. The status observing part observes an ambient temperature of an electric motor apparatus and a cycle time of the electric motor as status variables. The learning part learns an operating command to the electric motor in accordance with a training data set prepared based on a combination of the judgment data acquired by a judgment data acquiring part and the status variables.

Machine learning method and machine learning apparatus learning operating command to electric motor and controller and electric motor apparatus including machine learning apparatus

An attachment capable of preventing liquid from adhering to a specific electronic component within an electronic device. An electronic substrate has an attachment which can be attached to and detached from the electronic substrate. The attachment has an attachment part detachably attached to an edge of the electronic substrate; and a shield part connected to or integrally formed with the attachment part. The attachment part is a clip-like member having a certain degree of elasticity, and is configured to grip an edge of the electronic substrate so that the attachment is held at a predetermined place. The shield part has an inclined surface, and is configured to shield the electronic component so that liquid, such as a splash or droplet moving toward the electronic component, does not adhere to the component when the attachment is held at the predetermined place.

Growing community of inventors

Yamanashi, Japan

Norihiro Chou