The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2001
Filed:
Apr. 12, 2000
Takashi Jochi, Chiba-ken, JP;
Miyachi Technos Corporation, Chiba-ken, JP;
Abstract
A main control unit can be for example a microprocessor (CPU) or a dedicated logic circuit. Functionally, it comprises a setting unit,for imparting to respective units various set values (data) of various conditions entered from an input unit,, a sequence control unit,for providing a control of the weld time, a current error detector unit,for the constant-current control and a voltage error detector unit,for the constant-voltage control, a selector unit,for selecting one of error detected values fed respectively from the error detector units,and,, a PWM pulse generator unit,for generating a control pulse CP in accordance with the error detected value selected by the selector unit,, a mode switching monitor unit,for monitoring a current measured value I,and a voltage measured value V,for the switching of welding current control modes, a monitoring unit,for monitoring electrical parameters associated with the welding current control mode out of selection, and a display control unit,for the output of data to be displayed on a display unit