Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/0094—Structural association with other electrical or electronic devices
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
  • H02K17/42—Asynchronous induction generators
  • H02K17/44—Structural association with exciting machines
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K19/00—Synchronous motors or generators
  • H02K19/16—Synchronous generators
  • H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K19/00—Synchronous motors or generators
  • H02K19/16—Synchronous generators
  • H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
  • H02K19/32—Synchronous generators characterised by the arrangement of exciting windings for pole-changing

Definitions

• the invention refers to a generator which produces electric energy at a speed of 30 rot/min ; said generator being meant to be mounted on modular hydrokinetic assemblies, for exploiting the energetic potential of rivers in the plain regions, where the relief does not allow building classical hydro-energetic arrangements, such as dams or culverts.
• the problem that the invention seeks to solve consists in providing an electric generator that produces electric energy at a speed of 30 rot/min and has an optimum diameter for being mounted on modular hydrokinetic assemblies, as the number of poles depends solely on the number of electrical network phases whereto said generator is connected, and said rotor windings are fed from a source in commutation by means of a collector which has no physical contact, said source providing a frequency independent upon the number of poles and upon the rotor speed.
• the low speed electric generator according to the invention presents a series of other advantages that are essential for exploiting the energetic potential of plain rivers: as the axle rotation is slow, the attrition in the rotor bearings is reduced at a minimum, thus providing a long period of uninterrupted functioning; by using a collector without a physical contact between the components, the attrition is eliminated and a practically unlimited time functioning of the collector is ensured; - by the perfect insulation of the collector, the possibility of electric energy leakage in aquatic environment, specific to the generator, is excluded; the ability of producing electric energy at low speed eliminates the necessity of integrating, in the kinematic chain of converting mechanical energy into electrical energy, of a speed multiplier, thus reducing the manufacturing cost of the entire assembly.
• Fig. 1 a longitudinal section in the generator assembly
• Fig. 2 a block diagram of the excitation current supply source.
• the low speed electric generator comprises a housing (1) wherein stator winding cores (2) are mounted, said housing (1) being closed at the ends with shields (3] provided with bearings (4) which allow the rotation of an axle (5) whereon rotor winding cores (6) are mounted, said rotor winding cores (6) being supplied by means of an inductive collector (7) from a source [8] which produces an excitation current with alternative and intermittent polarity.
• the inductive collector (7) consists of a fixed primary winding (9] comprised in a fixed casing (10) integral with the shield (3), and a mobile secondary winding (11) comprised in the mobile housing (12), integral with the axle (5).
• the source (8) consists of an adjustable impulse forming circuit (13), connected by means of a delaying circuit (14) to a polarity alternating circuit (15) that supplies the rotor windings with a current supplied by a rectifier (16).
• the polarity alternating current (15) is connected to the lugs (a) and (b) of the fixed primary winding by means of conductors (17) and the current is transmitted to the mobile secondary winding (11) by electromagnetic induction created in the magnetic field formed by the fixed core (18) and the mobile core (19), circuit that closes by means of the fixed casing (10) integral with the shield (3) and the mobile housing (12) integral with the axle (5), and the excitation current induced in the mobile secondary winding (11) reaches the rotor windings (6) by means of conductors (20).
• said cores In order to increase the transfer surface of the magnetic field flux between the fixed core (18) and the mobile core (19), said cores have tapered conjugated facets (A).

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Synchronous Machinery (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=45374022

Family Applications (1)

Country Status (3)

Cited By (1)

Family Cites Families (2)

• 2011
  • 2011-06-03 RO ROA201100534A patent/RO126983A0/ro unknown
• 2012
  • 2012-06-05 WO PCT/RO2012/000015 patent/WO2012165989A2/en not_active Ceased
  • 2012-06-05 EP EP12755929.2A patent/EP2777138A2/de not_active Withdrawn

Non-Patent Citations (1)

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