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. 11, 1983
Filed:
Apr. 21, 1981
F Paul DeMello, Burnt Hills, NY (US);
Robert J Ringlee, Schenectady, NY (US);
Power Technologies, Inc., Schenectady, NY (US);
Abstract
Apparatus for controlling high voltage by absorption of capacitive vars, comprising a stator (10) having a core and a three phase winding (14) connected to the high voltage, and a rotor (12) having magnetic material (20) exhibiting a sharp magnetic saturation. The rotor (12) includes longitudinally extending damper bars (22) imbedded in grooves or slots (24) in a manner similar to the bars used in a squirrel cage rotor. The magnetic structure of the rotor can be of two types--a symmetrical structure for asynchronous operation, and a salient pole structure for synchronous operation. In the case of the symmetrical rotor construction, the stator (10) and rotor (12) constitute a rotating induction reactor (8) which operates in the same manner as a free running, unloaded induction motor. The induction reactor (8) exhibits characteristics similar to a saturable reactor with respect to var versus voltage absorption, but does not have the undesirable harmonics normally present in the saturable reactor. In the case of the salient pole rotor construction the stator (10) and rotor (12) constitute a rotating synchronous reactor which operates in the same manner as a free running unloaded reluctance motor. A series compensation arrangement can be provided by connecting capacitance means (24,26,28) in series with the stator winding (14) to reduce the droop characteristic of the incremental saturated inductance of the reactor (8) to almost zero. The transformer connecting the rotating reactor to the high voltage system can be provided with amps for steady state adjustment of the voltage level to be controlled.