ROBOT CONTROLLER AND PREVENTIVE MAINTENANCE METHOD

• Main Author: NAGATA HIROAKI
• Format: Patent
• Language: English; Japanese
• Published: 31.01.2023
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

To preventatively maintain a robot controller by predicting the degradation of a Y-capacitor in a line filter.SOLUTION: Detection means for detecting the zero-phase current is provided in a power supply line between a line filter 20 and a converter 30, which is provided on the load side of the line filter 20 and converts AC power to DC power. An alarm related to a Y capacitor is output when it is detected that the zero-phase current detected by the detection means is above a threshold. The detection means is, for example, a current detector 13 provided in a wiring for each phase in a power supply line, and the sum of the detection outputs of the current detectors 13 for each phase is obtained to make a zero-phase current.SELECTED DRAWING: Figure 2 【課題】ロボットコントローラに設けられるラインフィルタにおけるＹキャパシタの劣化を予測して予防保全を行う。【解決手段】ラインフィルタ２０とラインフィルタ２０の負荷側に設けられて交流電力を直流電力に変換するコンバータ３０との間の電源ラインに零相電流を検出する検出手段を設け、検出手段で検出された零相電流が閾値以上となったことを検出したときにＹキャパシタに関連する警報を出力する。検出手段は、例えば、電源ラインにおいて相ごとに配線に設けられた電流検出器１３であり、各相の電流検出器１３の検出出力の和を求めて零相電流とする。【選択図】図２