WELDING TYPE POWER SUPPLY WITH PHASE SHIFT DOUBLE FORWARD CONVERTER

Title:

WELDING TYPE POWER SUPPLY WITH PHASE SHIFT DOUBLE FORWARD CONVERTER

Document Type and Number:

WIPO Patent Application WO/2018/195384

Kind Code:

A3

Abstract:

A method and apparatus for providing welding type power includes a phase shifted double forward converter having a first and second converter and a controller. The controller includes a pwm module that sets the pwm timing signals. The pwm module includes a phase shift module that has a leading edge adjusted output and a trailing edge adjusted output responsive to the output load. The phase shift module also includes a duty cycle offset module and/or a Dmax module that is responsive to the output load current. The pwm module includes a disabling module responsive to at least one of the output current and output voltage that disables one of the first and second converters.

More Like This:

WO/2018/227186	METHODS AND SYSTEMS TO HEAT A WIRE FOR REDUCING THE HYDROGEN CONTENT
WO/2018/118888	ENGINE-DRIVEN WELDING-TYPE POWER SUPPLIES WITH SECONDARY ENERGY GENERATION

Inventors:

VOGEL BERNARD (US)
SCHARTNER QUINN (US)

Application Number:

PCT/US2018/028501

Publication Date:

November 15, 2018

Filing Date:

April 20, 2018

Export Citation:

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Assignee:

ILLINOIS TOOL WORKS (US)

International Classes:

B23K9/10; B23K9/09; H02M3/335

Foreign References:

US8952293B2

2015-02-10

Attorney, Agent or Firm:

CORRIGAN, George (US)

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