公开(公告)号：US20250125080A1

公开(公告)日：2025-04-17

申请号：US18914731

申请日：2024-10-14

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: H01F27/28

Abstract: Disclosed example planar transformers include: a magnetic core; a first primary winding board secured to the magnetic core; a first secondary winding board secured to the magnetic core, wherein each of the first primary winding board and the first secondary winding board comprise: a first printed winding on a first layer of a circuit board; first and second mounting tabs on the first layer of the circuit board or a third layer of the circuit board, and coupled to the first printed winding; a second printed winding on a second layer of the circuit board; and third and fourth mounting tabs on the second layer of the circuit board or a fourth layer of the circuit board, and coupled to the second printed winding; and a first spacer to position the first primary winding board a predetermined distance from the first secondary winding board.

公开(公告)号：US12263545B2

公开(公告)日：2025-04-01

申请号：US15670168

申请日：2017-08-07

Applicant: Illinois Tool Works Inc.

Inventor： Mark S. Kadlec ,  Andrew Joseph Henry

IPC: B23K9/10 ,  B23K9/067 ,  B23K9/073 ,  B23K9/09 ,  B23K9/095

Abstract: Welding-type power supplies with adjustable AC current commutation thresholds are disclosed. An example welding-type power supply includes an interface device to receive a commutation selection input, a power converter to convert input power to welding-type power, a commutator circuit to output alternating current (AC) welding-type power and to control a polarity of the AC welding-type power, and a control circuit. The control circuit determines a threshold output current based on the commutation selection input, determines an output current and a polarity of the AC welding-type power and, when the output current is less than the threshold output current, controls the commutator circuit to change the polarity of the AC welding-type power.

公开(公告)号：US11148219B2

公开(公告)日：2021-10-19

申请号：US16264080

申请日：2019-01-31

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10

Abstract: A method and apparatus for providing welding type power is disclosed. A welding type power supply includes an input circuit, a controller and an output circuit. The input circuit receives an input power signal and provides an intermediate power signal. The output circuit receives the intermediate power signal and provides a welding type power output. The output circuit has an inverter with at least two inverter switches, and a clamp circuit that limits the voltage across the inverter. The clamp circuit captures and buffers the excess energy, and returns the excess energy to an input of the inverter over a plurality of switching cycles. The controller has control outputs connected to the input circuit and the output circuit, to control them.

公开(公告)号：US20210276114A1

公开(公告)日：2021-09-09

申请号：US17330857

申请日：2021-05-26

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10 ,  H01F27/28 ,  H01L29/739 ,  H01L29/78

Abstract: An example welding-type power supply includes: a transformer having a primary winding and first and second secondary windings; an input circuit configured to provide an input voltage to the primary winding of the transformer; first, second, third, and fourth switching elements, and a control circuit configured to: control the first, second, third, and fourth switching elements to selectively output a positive or negative output voltage without a separate rectifier stage by selectively controlling ones of the first, second, third, and fourth switching elements based on a commanded output voltage polarity and an input voltage polarity to the transformer; and prior to changing from a first output voltage polarity to a second output voltage polarity, controlling the first, second, third, and fourth switching elements to reverse the power flow to return reactive energy to an input circuit via the transformer.

公开(公告)号：US20190030634A1

公开(公告)日：2019-01-31

申请号：US15663251

申请日：2017-07-28

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10 ,  H01L29/739 ,  H01L29/78 ,  H01F27/28

Abstract: Methods and apparatus to provide welding power are disclosed. An example welding-type power supply includes: a transformer having first and second secondary windings; switching elements configured to control current flow from the first and second secondary windings to an output; and a control circuit configured to control the switching elements to selectively output a positive output voltage or a negative output voltage without a separate rectifier stage by selecting, based on an output voltage polarity, a first subset of the switching elements to perform rectification.

公开(公告)号：US20240316674A1

公开(公告)日：2024-09-26

申请号：US18733522

申请日：2024-06-04

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10 ,  H01F27/28 ,  H01L29/739 ,  H01L29/78

CPC classification number: B23K9/1043 ,  B23K9/1056 ,  H01F27/28 ,  H01L29/7393 ,  H01L29/783

Abstract: An example welding-type power supply includes: a transformer having a primary winding and first and second secondary windings; an input circuit configured to provide an input voltage to the primary winding of the transformer; first, second, third, and fourth switching elements, and a control circuit configured to: control the first, second, third, and fourth switching elements to selectively output a positive or negative output voltage without a separate rectifier stage by selectively controlling ones of the first, second, third, and fourth switching elements based on a commanded output voltage polarity and an input voltage polarity to the transformer; and prior to changing from a first output voltage polarity to a second output voltage polarity, controlling the first, second, third, and fourth switching elements to reverse the power flow to return reactive energy to an input circuit via the transformer.

公开(公告)号：US12030142B2

公开(公告)日：2024-07-09

申请号：US17494368

申请日：2021-10-05

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10

CPC classification number: B23K9/1043

Abstract: A method and apparatus for providing welding type power is disclosed. A welding type power supply includes an input circuit, a controller and an output circuit. The input circuit receives an input power signal and provides an intermediate power signal. The output circuit receives the intermediate power signal and provides a welding type power output. The output circuit has an inverter with at least two inverter switches, and a clamp circuit that limits the voltage across the inverter. The clamp circuit captures and buffers the excess energy, and returns the excess energy to an input of the inverter over a plurality of switching cycles. The controller has control outputs connected to the input circuit and the output circuit, to control them.

公开(公告)号：US20220023964A1

公开(公告)日：2022-01-27

申请号：US17494368

申请日：2021-10-05

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10

Abstract: A method and apparatus for providing welding type power is disclosed. A welding type power supply includes an input circuit, a controller and an output circuit. The input circuit receives an input power signal and provides an intermediate power signal. The output circuit receives the intermediate power signal and provides a welding type power output. The output circuit has an inverter with at least two inverter switches, and a clamp circuit that limits the voltage across the inverter. The clamp circuit captures and buffers the excess energy, and returns the excess energy to an input of the inverter over a plurality of switching cycles. The controller has control outputs connected to the input circuit and the output circuit, to control them.

公开(公告)号：US11999021B2

公开(公告)日：2024-06-04

申请号：US17330857

申请日：2021-05-26

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10 ,  H01F27/28 ,  H01L29/739 ,  H01L29/78

CPC classification number: B23K9/1043 ,  B23K9/1056 ,  H01F27/28 ,  H01L29/7393 ,  H01L29/783

Abstract: An example welding-type power supply includes: a transformer having a primary winding and first and second secondary windings; an input circuit configured to provide an input voltage to the primary winding of the transformer; first, second, third, and fourth switching elements, and a control circuit configured to: control the first, second, third, and fourth switching elements to selectively output a positive or negative output voltage without a separate rectifier stage by selectively controlling ones of the first, second, third, and fourth switching elements based on a commanded output voltage polarity and an input voltage polarity to the transformer; and prior to changing from a first output voltage polarity to a second output voltage polarity, controlling the first, second, third, and fourth switching elements to reverse the power flow to return reactive energy to an input circuit via the transformer.

公开(公告)号：US11027357B2

公开(公告)日：2021-06-08

申请号：US15663251

申请日：2017-07-28

Applicant: Illinois Tool Works Inc.

Inventor： Andrew Joseph Henry

IPC: B23K9/10 ,  H01F27/28 ,  H01L29/739 ,  H01L29/78

Abstract: Methods and apparatus to provide welding power are disclosed. An example welding-type power supply includes: a transformer having first and second secondary windings; switching elements configured to control current flow from the first and second secondary windings to an output; and a control circuit configured to control the switching elements to selectively output a positive output voltage or a negative output voltage without a separate rectifier stage by selecting, based on an output voltage polarity, a first subset of the switching elements to perform rectification.