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.

Date of Patent:
Feb. 04, 2014

Filed:

Oct. 29, 2010
Applicants:

Minoru Maedako, Saitama, JP;

Yasuhiro Nakada, Saitama, JP;

Inventors:

Minoru Maedako, Saitama, JP;

Yasuhiro Nakada, Saitama, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

In a self-excited generatorincluding an automatic voltage regulator (AVR), a condensive load protection device includes: a field current control driverwhich is connected to the field windingin series and controlled to be ON/OFF by a drive circuitof the AVRto supply a field current to the field winding; and a condensive load protecting rotor short-circuit driverwhich is connected in parallel to the field winding, and supplies a short-circuit current to the field windingby being turned ON, and a bootstrap circuitis connected as a drive power supply of the field current control driver and the condensive load protecting rotor short-circuit driver, and the bootstrap circuitincludes a capacitance portionin which charges are accumulated when the field current control driveris ON.


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