Engine driven welder-generator with chopper circuit
AssigneeIllinois Tool Works Inc.
InventorsRandall Joseph DuVal, Daniel C. Fosbinder
Life of this patent
Estimating the term…
Abstract
An engine driven welder-generator including a chopper circuit and being adapted to produce an AC weld output, a DC weld output, and an auxiliary output is provided. The engine driven welder-generator is capable of selectively running at a low engine speed or a high engine speed based on operator inputs and may produce both AC and DC power outputs while utilizing the chopper circuit. The engine driven welder-generator is also adapted to provide an auxiliary output during an AC welding process and a DC welding process.
Claims20
An engine driven welder-generator, comprising:
- an engine;
- a single generator in operation driven by the engine and having stator windings to produce AC output power;
- power conversion circuitry comprising a rectifier and a chopper in operation to convert a portion of the AC output power to DC welding power for a DC welding load;
- synthetic auxiliary power circuitry configured in operation to convert a portion of the AC output power to synthetic auxiliary power for an auxiliary power load;
- and
- a controller configured in operation to control speed of the engine based upon the welding load and the auxiliary power load.
An engine driven welder-generator, comprising:
- an engine;
- a single generator in operation driven by the engine and having stator windings to produce AC output power;
- power conversion circuitry configured in operation to convert a portion of the AC output power to DC welding power for a DC welding load;
- synthetic auxiliary power circuitry configured in operation to convert a portion of the AC output power to synthetic auxiliary power for an auxiliary power load;
- sensors for detecting an electrical parameter of the loads;
- and
- a controller configured in operation to command different engine speeds based upon feedback from the sensors.
An engine driven welder-generator, comprising:
- an engine;
- a single generator in operation driven by the engine and having stator windings to produce AC output power;
- power conversion circuitry configured in operation to convert a portion of the AC output power to DC welding power for a DC welding load;
- synthetic auxiliary power circuitry configured in operation to convert a portion of the AC output power to synthetic auxiliary power for an auxiliary power load;
- sensors for detecting an electrical parameter of the loads;
- and
- a controller configured in operation to command at least one of engine speed, ignition, fuel injection, spark timing of the engine based upon feedback from the sensors.
Dependencies are inferred from the claim text.