Method and apparatus for welding
AssigneeIllinois Tool Works Inc.
InventorsJon O. Reynolds, Timothy Matus
Life of this patent
Estimating the term…
Abstract
A method and apparatus for providing welding power is disclosed. It includes a transformer with a primary winding and an output secondary winding. The ac side of a rectifier circuit is connected to the output secondary. A battery or other energy storage device, such as a capacitor, is connected in series with the dc side of the rectifier. The series combination is disposed to be connected to the load. Preferably, an input circuit receives a 115 volt ac input. The transformer has a primary to secondary turns ratio of at least about 9:1.
Claims35
A welding-type power supply for providing welding-type power to a load, comprising:
- a transformer, having a primary winding, an output secondary winding, and a charging secondary winding;
- a rectifier circuit, having an ac side connected to the output secondary and further having a dc side;
- a battery connected in series with the dc side to add to the output voltage, wherein the series combination is disposed to be connected to the load;
- a charging rectifier and a switch, having a control input, disposed to selectively connect the charging rectifier to at least one of the battery and the charging secondary winding;
- and
- a controller responsive to a trigger signal from a welding torch, and having a control output connected to the control input
A method of providing welding power comprising:
- transforming an ac input signal into a secondary ac signal;
- rectifying the secondary ac signal to produce a dc signal;
- providing the dc signal in series combination with a battery to add to the output voltage, wherein the series combination is provided to the load;
- and
- charging the battery when welding is not occurring in response to a trigger signal from a welding torch indicating the welding process is not being performed.
A welding-type power supply for providing welding-type power to a load, comprising:
- a transformer means for transforming an ac input signal into a second ac signal;
- a rectifier means for receiving the second ac signal and providing a dc signal;
- an energy storage means for adding voltage to the dc signal, and connected in series with the dc signal such that the series combination is disposed to be connected to the load;
- and
- charging means for selectively charging the energy storage means in response to a trigger signal from a welding gun.
A method of providing welding power comprising:
- transforming an ac input signal into a secondary ac signal;
- rectifying the secondary ac signal to produce a dc signal and;
- providing the dc signal in series combination with a battery in response to a trigger signal from a gun, wherein the series combination is provided to the load.
A welding-type power supply for providing welding-type power to a load, comprising:
- a transformer, having a primary winding and an output secondary winding;
- a rectifier circuit, having an ac side connected to the output secondary and further having a dc side and;
- an energy storage device;
- and
- a switch, responsive to a trigger signal from a gun, disposed to connect the energy storage device in series with the dc side to add to the output voltage, wherein the series combination is disposed to be connected to the load.
A welding-type power supply for providing welding-type power to a load, comprising:
- a converting circuit that is disposed to receive an ac input and provides a dc signal and;
- an energy storage device connected in series with the dc signal in response to a trigger signal from a gun to add to the output voltage, wherein the series combination is disposed to be connected to the load.
A method of providing welding power comprising:
- transforming an ac input signal into a secondary ac signal;
- rectifying the secondary ac signal to produce a dc signal and;
- providing the dc signal in series combination with an energy storage device in response to a trigger signal from a gun to add to the output voltage, wherein the series combination is provided to the load.
A method of providing welding-type power to a load, comprising:
- converting an ac input into a dc signal and;
- adding an energy storage device voltage in response to a trigger signal from a gun to the dc signal to produce a signal with a combined voltage that is disposed to be connected to the load.
A method of providing welding power comprising:
- transforming an ac input signal into a secondary ac signal;
- rectifying the secondary ac signal to produce a dc signal and;
- providing, in response to a trigger signal from a gun, the dc signal in series combination with an energy storage device, wherein the series combination is provided to the load.
Dependencies are inferred from the claim text.