Hybrid welding modules

Patent metadata

Field	Value
Publication number	US-10449615-B2
Application number	US-201615338859-A
Country	US
Kind code	B2
Filing date	Oct 31, 2016
Priority date	Oct 31, 2016
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

Hybrid welding modules are disclosed. An example hybrid welding module includes a welding input switch, an energy storage input switch, an energy storage output switching circuit, and a control circuit. The welding input switch receives welding-type input power and selectively outputs the welding-type input power to a weld circuit as first welding-type output power. The energy storage input switch receives the welding-type input power and selectively conducts the welding-type input power to an energy storage device. The energy storage output switching circuit converts energy output by the energy storage device to second welding-type power and outputs the second welding-type power to the weld circuit. The control circuit enables charging of the energy storage device by controlling the energy storage input switch to output the welding-type input power to the energy storage device, selectively controls the welding input switch to output the welding-type input power to the weld circuit, determines a commanded total welding-type current, monitors a first welding-type current through the welding input switch, monitors a second welding-type current output by the energy storage output switching circuit, and controls the energy storage output switching circuit to output the second welding-type power for combination with the first welding-type output power based on the commanded total welding-type current, the first welding-type current, and the second welding-type current.

First claim

What is claimed is:

1. A hybrid welding module, comprising:
a welding input switch configured to receive welding-type input power and to selectively output the welding-type input power to a weld circuit as first welding-type output power;
an energy storage input switch configured to receive the welding-type input power and to selectively conduct the welding-type input power to an energy storage device;
an energy storage output switching circuit to convert energy output by the energy storage device to second welding-type power and to output the second welding-type power to the weld circuit; and
a control circuit configured to:
enable charging of the energy storage device by controlling the energy storage input switch to output the welding-type input power to the energy storage device;
selectively controlling the welding input switch to output the welding-type input power to the weld circuit;
determine a commanded total welding-type current;
monitor a first welding-type current through the welding input switch;
monitor a second welding-type current output by the energy storage output switching circuit; and
control the energy storage output switching circuit to output the second welding-type power for combination with the first welding-type output power based on the commanded total welding-type current, the first welding-type current, and the second welding-type current.

2. The hybrid welding module as defined in claim 1 , further comprising a control interface configured to receive a communication from a welding-type power supply providing the welding-type input power, the communication comprising one or more weld parameters, the control circuit configured to determine the commanded total welding-type current based on the one or more weld parameters.

3. The hybrid welding module as defined in claim 2 , wherein the commanded total welding-type current is greater than a rated current output of the welding-type power supply.

4. The hybrid welding module as defined in claim 1 , further comprising a control interface configured to communicate with a welding-type power supply providing the welding-type input power, the control circuit configured to transmit a communication to the welding-type power supply to cause the welding-type power supply to provide the welding-type input power while charging the energy storage device and while the welding input switch is controlled to not output the welding-type input power to the weld circuit.

5. The hybrid welding module as defined in claim 4 , wherein the control circuit is configured to control the energy storage output switching circuit based on a voltage-amperage curve without changes to the welding-type input power by the welding-type power supply.

6. The hybrid welding module as defined in claim 4 , wherein the control circuit is configured to:
detect an end of a welding-type operation based on monitoring the first welding-type current; and
in response to detecting the end of the welding-type operation:
enable the charging of the energy storage device; and
transmit the communication to the welding-type power supply.

7. The hybrid welding module as defined in claim 1 , wherein the control circuit is configured to control the energy storage output switching circuit to control a voltage-amperage curve of the second welding-type power.

8. The hybrid welding module as defined in claim 1 , wherein the control circuit is configured to control the energy storage output switching circuit to adjust a total welding-type output power based on a voltage-amperage curve, the first welding-type current, and the second welding-type current.

9. The hybrid welding module as defined in claim 1 , wherein the energy storage output switching circuit comprises a boost converter to increase a voltage from the energy storage device.

10. The hybrid welding module as defined in claim 1 , wherein the energy storage output switching circuit comprises a buck converter to increase a voltage from the energy storage device.

11. The hybrid welding module as defined in claim 1 , wherein the control circuit is configured to control the energy storage output switching circuit based on a difference between the commanded total welding-type current and the first welding-type current.

12. The hybrid welding module as defined in claim 1 , wherein the energy storage output switching circuit comprises a buck circuit and a boost circuit, the control circuit configured to control the energy storage output switching circuit by controlling at least one of the boost circuit or the buck circuit.

13. The hybrid welding module as defined in claim 1 , wherein the control circuit is configured to control the energy storage output switching circuit to output an open circuit voltage when the first welding type input switch is open.

14. The hybrid welding module as defined in claim 1 , wherein the control circuit is configured to control the energy storage output switching circuit to provide initial power to the weld circuit during a start of a weld.

15. The hybrid welding module as defined in claim 14 , wherein the control circuit is configured to control the welding input switch to output at least a portion of the welding-type input power to the weld circuit after the start of the weld.

16. The hybrid welding module as defined in claim 1 , wherein the control circuit is configured to communicate with a welding-type power supply providing the welding-type input power to determine whether to control the energy storage output switching circuit to energize the weld circuit.

17. The hybrid welding module as defined in claim 16 , wherein the control circuit is configured to determine that the energy storage output switching circuit is to energize the weld circuit based on at least one of receiving an indication of a welding process type or receiving a remote trigger signal.

18. The hybrid welding module as defined in claim 1 , further comprising a charging circuit configured to charge the energy storage device using the welding-type input power.

19. A hybrid welding module, comprising:
a charging circuit configured to charge an energy storage device;
a multi-output power input switch configured to:
receive welding-type input power;
selectively output the welding-type input power to a weld circuit as first welding-type output power; and
selectively output the welding-type input power to the charging circuit, the charging circuit configured to charge the energy storage device using the welding-type input power;
an energy storage output switching circuit to convert energy output by the energy storage device to second welding-type power and to output the second welding-type power to the weld circuit; and
a control circuit configured to:
enable charging of the energy storage device by controlling the multi-output power input switch to output the welding-type input power to the charging circuit;
enable welding by controlling the multi-output power input switch to output the welding-type input power to the weld circuit;
determine a commanded total welding-type power;
monitor a first welding-type current output by the multi-output power input switch to the weld circuit;
monitor a second welding-type current output by the energy storage output switching circuit; and
control the energy storage output switching circuit to output the second welding-type power for combination with the first welding-type output power based on the commanded total welding-type power, the first welding-type current, and the second welding-type current.

Assignees

• Illinois Tool Works

Inventors

• Schartner Quinn William

Classifications

• B23K9/16

  making use of shielding gas · CPC title

• B23K9/1056

  by using digital means (B23K9/1068 takes precedence) · CPC title

• B23K9/1012

  characterised by parts of the process · CPC title

• B23K9/0956

  using sensing means, e.g. optical · CPC title

• B23K9/0953 Primary

  using computing means · CPC title