Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Yoshiyuki Tabata

Yoshiaki Tanaka

Koji Hamamoto

Norikazu Osaki

Akihiko Kitajima

Atsuhiro Kawamoto

Masaki Shimizu

Shigeki Yonemori

Masafumi Naruto

Shinsuke Shimabayashi

Tsutomu Naito

Kunio Kubo

Norikazu Oosaki

Norikazu Ohsaki

The welding device of the present disclosure has a switching section, a setting section, an output detector, a controller, a frequency controller, and a driver. The switching section is formed of a switching element. The setting section determines setting output. The output detector detects welding output. The controller calculates an output-on period of the switching section according to the setting output and the welding output. The frequency controller determines an inverter frequency based on the output-on period. The driver controls on/off operation of a switching element of the switching section based on the inverter frequency and the output-on period. When the output-on period is calculated using a first ratio, the inverter frequency is determined to a first frequency, and when the output-on period is calculated using a second ratio smaller than the first ratio, the inverter frequency is determined to a second frequency higher than the first frequency.

Welding device

If arc interruption occurs during AC arc welding, a first AC frequency predetermined for normal welding is switched to a second AC frequency higher than the first AC frequency. This allows the arc to be reignited without applying a high frequency high voltage, thereby preventing the damage of the surface of the weld bead or communication failure due to the high frequency high voltage.

Alternating-current welding method and alternating-current welding device

An inverter control device drives one of the two switching circuits with a fixed conduction width and changes the control method of the other switching circuit between pulse-width modulation, phase control method, and drive signal width control method by phase control method according to an output state, to implement highly accurate control at low output while suppressing heat generation of a switching element.

Inverter control device and method with multiple switching circuit control methods

A welding condition inputting equipment capable of setting the welding conditions such as welding current and welding voltage easily and securely is disclosed. The welding condition inputting equipment comprises an operating section for inputting the welding conditions, a determining section for selecting items, and a display section for displaying selected items. When the welding conditions are input, the operating section outputs the conditions to the determining section. When the conditions are input in the determining section, the determining section selects items relating to welding corresponding to the conditions, and outputs the items to the display section. When the items are input in the display section, the display section displays the items. The operating section specifically includes a dial, a switch, and a push-in dial switch integrally combining a dial rotation detecting part.

Welding condition inputting equipment

Welding machine

Growing community of inventors

Hyogo, Japan

Yoshiyuki Tabata