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:
Oct. 11, 1983
Filed:
Mar. 12, 1981
Raymond E Nordbrock, West Chicago, IL (US);
Kirk A Sievers, Roselle, IL (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A charging system for amplifying AC output voltages induced in at least one stator winding of an alternator by residual magnetism from a low carbon steel rotor to self-excite the charging system by means of the residual magnetism at low engine RPM. An electronic voltage regulator is responsive to small AC output voltages from the stator winding, even below voltage levels required to forward bias a silicon semiconductor junction, to fully energize the field winding of the alternator. Since the voltage regulator is responsive to alternator signal developed at low engine RPM, the regulator can also be used as a sensor to indicate an operative engine condition, such as start up.