REAL TIME RESISTANCE MONITORING OF AN ARC WELDING CIRCUIT

A welding or additive manufacturing power supply includes output circuitry configured to generate a welding waveform, a current sensor for measuring a welding current generated by the output circuitry, a voltage sensor for measuring an output voltage of the welding waveform, and a controller operati...

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Bibliographische Detailangaben
Hauptverfasser:	FLEMING DANIEL P, KELM JONATHON C, HILLEN EDWARD D, HENRY JUDAH B
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A welding or additive manufacturing power supply includes output circuitry configured to generate a welding waveform, a current sensor for measuring a welding current generated by the output circuitry, a voltage sensor for measuring an output voltage of the welding waveform, and a controller operatively connected to the output circuitry to control the welding waveform, and operatively connected to the current sensor and the voltage sensor to monitor the welding current and the output voltage. A portion of welding waveform includes a controlled change in current from a first level to a second level different from the first level. The controller is configured to determine a circuit inductance from the output voltage and the controlled change in current, and further determines a change in resistance of a consumable electrode in real time based on the circuit inductance. 용접 또는 적층 제조 전원 공급기는 용접 파형을 생성하도록 구성되는 출력 회로망, 출력 회로망에 의해 생성되는 용접 전류를 측정하는 전류 센서, 용접 파형의 출력 전압을 측정하는 전압 센서, 및 용접 파형을 제어하도록 출력 회로망에 작동적 연결되고, 용접 전류 및 출력 전압을 모니터링하도록 전류 센서 및 전압 센서에 작동적 연결되는 제어기를 포함한다. 용접 파형의 일부는 제1 레벨로부터 제1 레벨과 상이한 제2 레벨로의 전류의 제어된 변화를 포함한다. 제어기는 출력 전압 및 전류의 제어된 변화로부터 회로 인덕턴스를 결정하고, 회로 인덕턴스에 기반하여 실시간으로 소모품 전극의 저항의 변화를 추가로 결정하도록 구성된다.