Energy conversion method and apparatus, and welding device

摘要

The invention relates to a method and an apparatus for converting the energy of an energy storage (2) for operating an arc (6), wherein a power unit (3) and an input and/or output device (5) for setting the current for operating the arc (6) is used to convert energy, as well as an appropriate welding device. In order to be able to provide the user with information on the state of energy storage (2), the time remaining for operating the arc (6) using the set current is calculated depending on a determined capacity of the energy storage (2) and a value for the current set on the input and/or output device (5), and said time is displayed on a corresponding display unit (27).

主权项

1. A welding device comprising:
an energy storage, a torch for forming an arc, an input and/or output device connected to a control device for setting a welding current, a power unit to convert an energy of the energy storage for operating the arc, wherein the control device is designed for calculating a reference value of a welding time remaining for performing a welding process depending on a determined capacity of the energy storage and a value for the welding current set on the input and/or output device before performing the welding process, adjusting a remaining welding time according to a change in the welding current at the input and/or output device, adjusting the calculated remaining welding time while performing the welding process based on the actual values of the welding current and a welding voltage, creating a library in which an average value of energy consumption for a plurality of welding current settings is stored as an empirical value, updating the library with every welding process performed with the welding device, and calculating a number of welding processes which can be performed with an available capacity of the energy storage using a set welding current based on the available energy capacity of the energy storage and the empirical value of energy consumption for the particular welding process and the set welding current stored in the library and a display unit for displaying a calculated value of the remaining welding time.