Main circuit of electric power generating apparatus for dispersed power supply

• US 20120056603A1
• Filed: 11/09/2011
• Published: 03/08/2012
• Est. Priority Date: 09/28/2005
• Status: Active Grant

• Current Assignee: Toyo Electric Manufacturing Company Limited
• Original Assignee: Toyo Electric Manufacturing Company Limited
• Inventors: Shiota, Takashi, Tanaka, Keita, Isaka, Tsutomu
• Granted Patent: US 8,237,302 B2
• Time in Patent Office: Days
• US Class Current: 322/96
• CPC Class Codes: F05B 2220/7068 equipped with permanent magnets
• CPC Class Codes: H02J 2300/20 The dispersed energy generation being of renewable origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 7/32 for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
• CPC Class Codes: H02K 21/48 Generators with two or more outputs
• CPC Class Codes: H02M 7/08 arranged for operation in parallel
• CPC Class Codes: H02P 2101/10 for water-driven turbines
• CPC Class Codes: H02P 2101/15 for wind-driven turbines
• CPC Class Codes: H02P 9/007 Control circuits for doubly fed generators
• CPC Class Codes: H02P 9/02 Details
• CPC Class Codes: H02P 9/14 by variation of field H02P9/08, H02P9/10 take precedence
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects

Abstract

Main circuit of an electric power generating apparatus for dispersed power supply, having a permanent magnet type electric power generator driven by windmill or waterwheel and having three windings, each inducing a different value of induced voltage, AC outputs of the generator rectified by rectifiers, and DC outputs of the rectifiers summed in parallel for output. First and second reactors are respectively connected in series between first and second rectifiers and output terminals of first and second windings, the first winding inducing the lowest induced voltage among the three windings, the second winding inducing the second lowest. A capacitor is connected between a third rectifier and an output terminal of a third winding inducing the highest induced voltage. The sum of inductive impedance by internal inductance of the third winding and capacitive impedance by the capacitor is capacitive impedance within a range of rotational speed of the generator.

Claims

1. A main circuit of an electric power generating apparatus for dispersed power supply, comprising:

a permanent magnet type electric power generator driven by a windmill or waterwheel and having three windings, each of said three windings inducing different effective values of induced voltages, alternating current outputs of said permanent magnet type electric power generator being rectified by individual rectifiers, and direct current outputs of said individual rectifiers being summed up in parallel to output to an external, wherein

a reactor is connected in series between a first individual rectifier and an alternating current output terminal of a first one of said three windings, said first winding inducing a lowest effective value of induced voltage among said three windings,

a second reactor is connected in series between a second individual rectifier and an alternating current output terminal of a second one of said three windings, said second winding inducing a second lowest effective value of induced voltage among said three windings, and

a capacitor is connected in series between a third individual rectifier and an alternating current output terminal of a third one of said three windings, said third winding inducing a highest effective value of induced voltage among said three windings,

in a manner that a sum of inductive impedance by internal inductance of the third winding and capacitive impedance by said capacitor is capacitive impedance having its absolute value being decreased at an increase of number of rotations of the windmill or waterwheel within a range of rated rotational speed of said permanent magnet type electric power generator.