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. 23, 2007
Filed:
Jul. 20, 2005
Applicant:
Jan Caroe Aarestrup, Bjerringbro, DK;
Inventor:
Jan Caroe Aarestrup, Bjerringbro, DK;
Assignee:
Grundfos a/s, Bjerringbro, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a method for controlling the firing angle of a signle-phase AC powered electric motor which is triggered by means of at least one locking electronic switch, especially a triac (Tand T) located between the distribution voltage (U) and at least one motor winding (A, B). According to said method, intervals are defined within which the triacs (Tto T) are to be fired according to the curve of the distribution voltage (U) and the voltage (U) induced in the respective winding in order to allow the motor to start as quickly and smoothly as possible and run quietly and at high efficiency.