WO2024043351A2 - Commutationless alternating-current machine - Google Patents

Commutationless alternating-current machine Download PDF

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Publication number
WO2024043351A2
WO2024043351A2 PCT/KP2023/000056 KP2023000056W WO2024043351A2 WO 2024043351 A2 WO2024043351 A2 WO 2024043351A2 KP 2023000056 W KP2023000056 W KP 2023000056W WO 2024043351 A2 WO2024043351 A2 WO 2024043351A2
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WIPO (PCT)
Prior art keywords
salient pole
armature
excitation
stator
alternating
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PCT/KP2023/000056
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French (fr)
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WO2024043351A3 (en
Inventor
Song Hyok JANG
Original Assignee
Jang Song Hyok
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Publication of WO2024043351A2 publication Critical patent/WO2024043351A2/en
Publication of WO2024043351A3 publication Critical patent/WO2024043351A3/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/38—Structural association of synchronous generators with exciting machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/10—Synchronous motors for multi-phase current
    • H02K19/12—Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/02—Synchronous motors
    • H02K19/10—Synchronous motors for multi-phase current

Definitions

  • the invention relates to a commutationless alternating-current machine without a commutator and brushes, without an electronic commutating device, and without commutation in the armature winding.
  • the alternating-current machines are distinguished into asynchronous machines, synchronous machines and alternating-current commutator machines.
  • the asynchronous machine has no commutator and brushes, so it is simple in structure and has little fault, but only by a voltage-frequency change can the rotating speed be adjusted smoothly.
  • the synchronous machine has no commutator, but its rotating speed can be adjusted only by frequency change.
  • the alternating-current commutator machine has features that, if used as a motor, its rotating speed can be smoothly adjusted by voltage and, if used as a generator, it outputs a rotating electromotive force with the same frequency as the excitation source regardless of the rotating speed, but has a commutator and brushes.
  • the purpose of the present invention is to provide a hovel alternating-current machine, a commutationless alternating-current machine which has no commutator and brushes, nor electronic commutating device but the rotating speed of which can be smoothly adjusted by voltage and which outputs a rotating electromotive force with the same frequency as the excitation source regardless of the rotating speed.
  • Hie commutationless alternating-current machine comprises a stator on which the primary winding of an excitation transformer having two input terminals where an AC power supply is input is wound, a salient pole rotor which rotates inside the stator and on each salient pole of which the secondary winding of the excitation transformer that supplies the excitation source to an excitation winding is separately wound, an armature into which an armature winding is inserted with two input/output terminals where an AC power supply is input or output, a salient pole inductor which rotates inside the armature and on each salient pole of which the excitation winding that produces an excitation magnetic field is separately wound, an annular housing with the stator and the armature fixed in it, an axis of rotation with the salient pole rotor and the salient
  • the commutationless alternating-current machine has a new structure of excitation transformer which supplies an excitation source to the excitation winding.
  • the excitation transformer consists of a stator and a salient pole rotor.
  • the stator of the excitation transformer comprises a stator yoke, 2*M (M: the number of pole pairs) stator salient poles protruded inside and the primary winding of the excitation transformer which is wound with the same number of turns on each stator salient pole.
  • the primary windings of the excitation transformer with two input terminals are connected so that the polarity of the salient poles in the stator is changed alternately.
  • the salient pole rotor has more than 6*M (M: the number of pole pairs) salient poles, and the secondary windings of the excitation transformer with the same resistivity and diameter are wound on each salient pole of the salient pole rotor in the same direction and with the same number of turns.
  • the armature comprises an armature yoke, 2 x M (M: the number of pole pairs) armature salient poles protruded inside and the armature winding, and at the end of each armature salient pole there are some, slots to insert the active edges of the armature winding, and the active edges are inserted into these slots.
  • the armature winding is connected so that the directions of the electric current flowing through the active edges of the armature winding are reversed at any adjacent armature salient poles.
  • the armature winding has two input/output terminals to input or output an AC power supply.
  • the salient pole inductor has more than 6*M (M: the number of pole pairs) salient poles, and the excitation windings with the same resistivity and diameter are wound on each salient pole of the salient pole inductor in the same direction and with the same number of turns.
  • stator and the armature having the same number of poles, are fixed in series inside the annular housing so that each stator salient pole has the same phase angle in space as the corresponding armature salient pole.
  • the salient pole rotor and the salient pole inductor having the same number of poles, are fixed on an axis of rotation so that each salient pole of the salient pole rotor has the same phase angle in space as the corresponding salient pole of the salinet pole inductor, and the secondary windings and excitation windings wound on the corresponding salient poles are interconnected in the same direction to form closed circuits separately.
  • the secondary windings are electrically connected with the corresponding excitation windings by two junction wires.
  • the phase of the armature current is not inverted because the AC power supply is supplied, as it is, to the armature winding not through a commutator and brushes or an electronic commutating device, however when the rotor rotates, the phase of the excitation current flowing into the excitation winding by the excitation transformer is properly inverted according to one of the armature current every time the armature salient pole is changed.
  • the resultant magnetic field made by the individual salient poles of the salient pole inductor is an alternating magnetic field without phase inversion in space.
  • the phases of the armature current and the excitation magnetic field produced by the salient pole inductor are not inverted, so that die rotor rotates in a certain direction when the two phases are identical.
  • a multiphase commutationless alternating-current machine is formed by the combination of the commutationless alternating-current machines according to the present invention in series or in parallel.
  • the tandem three-phase commutationless alternating-current machine is formed by die connection of three commutationless alternating-current machines in series and the parallel three-phase commutationless alternating-current machine is formed by the connection of three commutationless alternating-current machines in parallel.
  • the rotating speed can be adjusted by adjusting the armature voltage or the excitation current.
  • FIG. 1 is a longitudinal section view showing the Structure of an embodiment of the commutationless alternating-current machine according to the present invention.
  • FIG. 2 is an A-A cross section view showing die structure of the excitation transformer in tire commutationless alternating-current machine of FIG. 1.
  • FIG. 3 is a B-B cross section view showing die structure of the armature and the salient pole inductor in the commutationless alternating-current machine of FIG. 1.
  • FIG. 4 is a perspective view showing tire structure of the rotor in an embodiment of the commutationless alternating-current machine according to the present invention.
  • FIG. 5 is a schematic diagram showing a connection of an embodiment of the commutationless alternating-current machine according to the present invention. DETAILED DESCRIPTION OF THE INVENTION
  • FIG. 1 An embodiment of the according to the present invention shown in FIG. 1 is a four-pole alternating-current machine.
  • the commutationless alternating-current machine comprises a stator (2) on which the primary winding (6) of an excitation transformer (1) having two input terminals where an AC power supply is input is wound, a salient pole rotor
  • phase regulator (16) which regulates the phase of the excitation current.
  • the stator (2) of the excitation transformer (1) comprises a stator yoke (22), four stator salient poles (21) protruded inside and the primary winding (6) of the excitation transformer (1) which is wound two hundred turns on each stator salient pole (21).
  • the primary windings (6) are electrically interconnected so that the polarities of any adjacent stator salient poles (21 ) are opposite each other.
  • the core of the stator (2) is fabricated by laminating silicon steel plates and the lamination thickness (L1) is 20 mm.
  • the inner diameter (2xR2)) of the stator (2) is 100.6 mm.
  • the angle of circumference ( ⁇ 1) of a salient pole (21) in the istator (2) is 64°.
  • oil is die angle of circumference of the space between the adjacent salient poles (21) in the stator (2).
  • the salient pole rotor (3) has fourteen salient poles (31), and the secondary windings (7) of the excitation transformer (1) with the same resistivity and diameter are wound a hundred turns on each salient pole (31) of the salient pole rotor (3) in the same direction.
  • the core of the salient pole rotor (3) is fabricated by laminating silicon steel plates and the lamination thickness (Lz) is 20 mm.
  • the outer diameter (2xRi) of the salient pole rotor (3) is 100 mm.
  • the gap between the salient pole (31) of the salient pole rotor (3) and the stator salient pole (21) is the salient pole rotor gap (17).
  • the armature (4) comprises an armature yoke (42), four armature salient poles (41) protruded inside and the armature winding (8), and at the end of each armature salient pole (41) there are some slots (15) to insert the active edges (81) of the armature winding (8), and the active edges (81) are inserted into these slots ( 15).
  • the armature winding (8) is connected so that the directions of the electric current flowing through the active edges (81) of the armature winding (8) are reversed at any adjacent armature salient poles (41).
  • the armature winding (8) has two inputoutput terminals to input or output an AC power supply.
  • the angle of circumference ( ⁇ 2) of a salient pole (41) in the armature (4) is 64°.
  • ⁇ 2 is the angle of circumference of the space between the adjacent salient poles (41) in the armature (4).
  • the core of the armature (4) is fabricated by laminating silicon steel plates and die lamination thickness (Lz) is 30 mm.
  • the inner diameter (2XR 2 ) of the armature (4) is 100.6 mm.
  • the salient pole inductor (5) has fourteen salient poles (51), and the excitation windings (9) with the same resistivity and diameter are wound a hundred turns on each salient pole (51) of the salient pole inductor (5) in the same direction.
  • the core of the salient pole inductor (5) is fabricated by laminating silicon steel plates and the lamination thickness (Lz) is 30 mm.
  • the outer diameter (2xR1) of the salient pole inductor (5) is 100 mm.
  • the gap between the salient pole (51) of the salient pole inductor (5) and the armature salient pole (41) is the salient pole inductor gap (18).
  • y is the angle of circumference of a salient pole in the salient pole rotor (3) and the salient pole inductor (5).
  • the stator (2) and the armature (4) having the same numbers of poles, are fixed in series inside the annular housing (11) so that each stator salient pole (21) has the same phase angle in space as the corresponding armature salient pole (41).
  • each salient pole (31) of the salient pole rotor (3) has the same phase angle in space as the corresponding salient pole (51) of the salient pole inductor (5), and the secondary windings (7) and excitation windings (9) wound on the corresponding salient poles are interconnected in the same direction to form closed circuits separately.
  • the secondary winding (7) is connected with the corresponding excitation winding (9) by two junction wires (10).
  • the primary winding (6) carries the primary current of the excitation transformer (1), and by the primary current of the excitation transformer (1) the main magnetic flux of the excitation transformer (1) is formed along a magnetic circuit consisting of stator salient pole (21) — * salient pole rotor gap (17) — ⁇ salient pole (31) of the salient pole rotor (3) — ⁇ yoke (32) of the salient pole rotor (3) — > salient pole (31) of the salient pole rotor (3) — ⁇ salient pole rotor gap (17) — > stator salient pole (21) —> stator yoke (22) — ⁇ stator salient pole (21).
  • the transformer electromotive force and the rotating electromotive force are induced in the secondary windings (7) wound on the salient poles (31) of the salient pole rotor (3) under the stator salient poles (21) of the excitation transformer (1). Then the rotating electromotive force is cancelled because of equal magnitude and opposite direction, and the transformer electromotive force is supplied to the excitation windings (9) as an excitation source to flow the excitation current.
  • an excitation magnetic field is formed, with the same frequency as the power supply input to the primary winding (6) of the excitation transformer (1), along a magnetic circuit consisting of salient pole (51) of the salient pole inductor (5) -* salient pole inductor gap (18) — * armature salient pole (41) — ⁇ armature yoke (42) -> armature salient pole (41) — ⁇ salient pole inductor gap (18) — ⁇ s alient pole (51) of the salient pole inductor (5) ⁇ yoke (52) of the salient -pole inductor (5) ⁇ salient pole (51) of the salient pole inductor (5).
  • the rotor (19) rotates in a certain direction.
  • the rotating electromotive force with the same frequency as the power supply input to the primary winding (6) of the excitation transformer (1) is induced in file armature winding (8).

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  • Power Engineering (AREA)
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Abstract

The invention relates to a commutationless alternating-current machine without a commutator and brushes, without an electronic commutating device, and without commutation in the armature winding. The commutationless alternating-current machine according to the present invention comprises a stator (2) on which the primary winding (6) of an excitation transformer (1) having two input terminals where an AC power supply is input is wound, a salient pole rotor (3) which rotates inside the stator (2) and on each salient pole (31) of which the secondary winding (7) of the excitation transformer (1) that supplies the excitation source to an excitation winding (9) is separately wound, an armature (4) into which an armature winding (8) is inserted with two input/output terminals where an AC power supply is input or output, a salient pole inductor (5) which rotates inside the armature (4) and on each salient pole (51) of which the excitation winding (9) that produces an excitation magnetic field is separately wound, an annular housing (11) with the stator (2) and the armature (4) fixed in it, an axis of rotation (12) with the salient pole rotor (3) and the salient pole inductor (5) fixed on it, two bearings (13) and two bearing caps (14), and a phase regulator (16) which regulates the phase of the excitation current. In the commutationless alternating-current machine, the rotating speed can be smoothly adjusted by voltage or the rotating electromotive force with the same frequency as the excitation source can be output regardless of the rotating speed.

Description

COMMUTATIONLESS ALTERNATING-CURRENT MACHINE
FIELD OF THE INVENTION
The invention relates to a commutationless alternating-current machine without a commutator and brushes, without an electronic commutating device, and without commutation in the armature winding.
BACKGROUND OF THE INVENTION
The alternating-current machines are distinguished into asynchronous machines, synchronous machines and alternating-current commutator machines.
The asynchronous machine has no commutator and brushes, so it is simple in structure and has little fault, but only by a voltage-frequency change can the rotating speed be adjusted smoothly.
The synchronous machine has no commutator, but its rotating speed can be adjusted only by frequency change.
The alternating-current commutator machine has features that, if used as a motor, its rotating speed can be smoothly adjusted by voltage and, if used as a generator, it outputs a rotating electromotive force with the same frequency as the excitation source regardless of the rotating speed, but has a commutator and brushes.
So far, there has been no alternating-current machine in the world which has no commutator and brushes and does not use an electronic commutating device like the asynchronous machine but the rotating speed of which can be smoothly adjusted by voltage and which outputs a rotating electromotive force with the same frequency as the excitation source regardless of the rotating speed.
The purpose of the present invention is to provide a hovel alternating-current machine, a commutationless alternating-current machine which has no commutator and brushes, nor electronic commutating device but the rotating speed of which can be smoothly adjusted by voltage and which outputs a rotating electromotive force with the same frequency as the excitation source regardless of the rotating speed.
SUMMARY
The present invention relates to a commutationless alternating-current machine without a commutator and brushes, without an electronic commutating device, and without commutation in the armature winding. Hie commutationless alternating-current machine according to the present invention comprises a stator on which the primary winding of an excitation transformer having two input terminals where an AC power supply is input is wound, a salient pole rotor which rotates inside the stator and on each salient pole of which the secondary winding of the excitation transformer that supplies the excitation source to an excitation winding is separately wound, an armature into which an armature winding is inserted with two input/output terminals where an AC power supply is input or output, a salient pole inductor which rotates inside the armature and on each salient pole of which the excitation winding that produces an excitation magnetic field is separately wound, an annular housing with the stator and the armature fixed in it, an axis of rotation with the salient pole rotor and the salient pole inductor fixed on it, two bearings and two bearing caps, and a phase regulator which regulates the phase of the excitation current.
The commutationless alternating-current machine has a new structure of excitation transformer which supplies an excitation source to the excitation winding.
The excitation transformer consists of a stator and a salient pole rotor.
The stator of the excitation transformer comprises a stator yoke, 2*M (M: the number of pole pairs) stator salient poles protruded inside and the primary winding of the excitation transformer which is wound with the same number of turns on each stator salient pole.
The primary windings of the excitation transformer with two input terminals are connected so that the polarity of the salient poles in the stator is changed alternately.
The salient pole rotor has more than 6*M (M: the number of pole pairs) salient poles, and the secondary windings of the excitation transformer with the same resistivity and diameter are wound on each salient pole of the salient pole rotor in the same direction and with the same number of turns.
The armature comprises an armature yoke, 2 x M (M: the number of pole pairs) armature salient poles protruded inside and the armature winding, and at the end of each armature salient pole there are some, slots to insert the active edges of the armature winding, and the active edges are inserted into these slots. The armature winding is connected so that the directions of the electric current flowing through the active edges of the armature winding are reversed at any adjacent armature salient poles.
The armature winding has two input/output terminals to input or output an AC power supply.
The salient pole inductor has more than 6*M (M: the number of pole pairs) salient poles, and the excitation windings with the same resistivity and diameter are wound on each salient pole of the salient pole inductor in the same direction and with the same number of turns.
The stator and the armature, having the same number of poles, are fixed in series inside the annular housing so that each stator salient pole has the same phase angle in space as the corresponding armature salient pole.
The salient pole rotor and the salient pole inductor, having the same number of poles, are fixed on an axis of rotation so that each salient pole of the salient pole rotor has the same phase angle in space as the corresponding salient pole of the salinet pole inductor, and the secondary windings and excitation windings wound on the corresponding salient poles are interconnected in the same direction to form closed circuits separately. The secondary windings are electrically connected with the corresponding excitation windings by two junction wires. In the commutationless alternating-current machine according to the present invention the phase of the armature current is not inverted because the AC power supply is supplied, as it is, to the armature winding not through a commutator and brushes or an electronic commutating device, however when the rotor rotates, the phase of the excitation current flowing into the excitation winding by the excitation transformer is properly inverted according to one of the armature current every time the armature salient pole is changed.
But according to a reference flame set in the armature, the resultant magnetic field made by the individual salient poles of the salient pole inductor is an alternating magnetic field without phase inversion in space.
Like this, according to the reference frame set in the armature, in the commutationless alternating-current machine according to the present invention the phases of the armature current and the excitation magnetic field produced by the salient pole inductor are not inverted, so that die rotor rotates in a certain direction when the two phases are identical.
A multiphase commutationless alternating-current machine is formed by the combination of the commutationless alternating-current machines according to the present invention in series or in parallel.
The tandem three-phase commutationless alternating-current machine is formed by die connection of three commutationless alternating-current machines in series and the parallel three-phase commutationless alternating-current machine is formed by the connection of three commutationless alternating-current machines in parallel.
The commutationless alternating-current machine according to the present invention has the following characteristics:
1) It rotates without a commutator and brushes and witiiout an electronic commutating device.
Figure imgf000005_0001
2) The rotating speed can be adjusted by adjusting the armature voltage or the excitation current.
3) It outputs the rotating electromotive force with the same frequency as the excitation source regardless of the rotating speed.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a longitudinal section view showing the Structure of an embodiment of the commutationless alternating-current machine according to the present invention.
FIG. 2 is an A-A cross section view showing die structure of the excitation transformer in tire commutationless alternating-current machine of FIG. 1.
FIG. 3 is a B-B cross section view showing die structure of the armature and the salient pole inductor in the commutationless alternating-current machine of FIG. 1.
FIG. 4 is a perspective view showing tire structure of the rotor in an embodiment of the commutationless alternating-current machine according to the present invention.
FIG. 5 is a schematic diagram showing a connection of an embodiment of the commutationless alternating-current machine according to the present invention. DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the according to the present invention shown in FIG. 1 is a four-pole alternating-current machine.
As shown in FIG. 1, the commutationless alternating-current machine comprises a stator (2) on which the primary winding (6) of an excitation transformer (1) having two input terminals where an AC power supply is input is wound, a salient pole rotor
(3) which rotates inside the stator (2) and on each salient pole (31) of which die secondary winding (7) of the excitation transformer (1) that supplies the excitation source to an excitation winding (9) is separately wound, an armature (4) into which an armature winding (8) is inserted with two input/output terminals where an AC power supply is input or output, a salient pole inductor (5) which rotates inside the armature
(4) and on each salient pole (51) of which the excitation winding (9) that produces an excitation magnetic field is separately wound, an annular housing (11) with the stator
(2) and the armature (4) fixed in it, an axis of rotation (12) with the salient pole rotor
(3) and the salient pole inductor (5) fixed on it, two bearings (13) and two bearing caps (14), and a phase regulator (16) which regulates the phase of the excitation current.
In FIG. 2 the stator (2) of the excitation transformer (1) comprises a stator yoke (22), four stator salient poles (21) protruded inside and the primary winding (6) of the excitation transformer (1) which is wound two hundred turns on each stator salient pole (21).
The primary windings (6) are electrically interconnected so that the polarities of any adjacent stator salient poles (21 ) are opposite each other.
The core of the stator (2) is fabricated by laminating silicon steel plates and the lamination thickness (L1) is 20 mm. The inner diameter (2xR2)) of the stator (2) is 100.6 mm.
The angle of circumference (β1) of a salient pole (21) in the istator (2) is 64°. oil is die angle of circumference of the space between the adjacent salient poles (21) in the stator (2).
In FIG. 2 the salient pole rotor (3) has fourteen salient poles (31), and the secondary windings (7) of the excitation transformer (1) with the same resistivity and diameter are wound a hundred turns on each salient pole (31) of the salient pole rotor (3) in the same direction. The core of the salient pole rotor (3) is fabricated by laminating silicon steel plates and the lamination thickness (Lz) is 20 mm. The outer diameter (2xRi) of the salient pole rotor (3) is 100 mm.
The gap between the salient pole (31) of the salient pole rotor (3) and the stator salient pole (21) is the salient pole rotor gap (17).
In FIG. 3 the armature (4) comprises an armature yoke (42), four armature salient poles (41) protruded inside and the armature winding (8), and at the end of each armature salient pole (41) there are some slots (15) to insert the active edges (81) of the armature winding (8), and the active edges (81) are inserted into these slots ( 15).
The armature winding (8) is connected so that the directions of the electric current flowing through the active edges (81) of the armature winding (8) are reversed at any adjacent armature salient poles (41).
The armature winding (8) has two inputoutput terminals to input or output an AC power supply.
The angle of circumference (β2) of a salient pole (41) in the armature (4) is 64°. α2 is the angle of circumference of the space between the adjacent salient poles (41) in the armature (4).
The core of the armature (4) is fabricated by laminating silicon steel plates and die lamination thickness (Lz) is 30 mm. The inner diameter (2XR2) of the armature (4) is 100.6 mm.
In FIG. 3 the salient pole inductor (5) has fourteen salient poles (51), and the excitation windings (9) with the same resistivity and diameter are wound a hundred turns on each salient pole (51) of the salient pole inductor (5) in the same direction.
The core of the salient pole inductor (5) is fabricated by laminating silicon steel plates and the lamination thickness (Lz) is 30 mm. The outer diameter (2xR1) of the salient pole inductor (5) is 100 mm.
The gap between the salient pole (51) of the salient pole inductor (5) and the armature salient pole (41) is the salient pole inductor gap (18). y is the angle of circumference of a salient pole in the salient pole rotor (3) and the salient pole inductor (5). In FIG. 1 the stator (2) and the armature (4), having the same numbers of poles, are fixed in series inside the annular housing (11) so that each stator salient pole (21) has the same phase angle in space as the corresponding armature salient pole (41).
As shown in FIG. 4 the salient pole rotor (3) and the salient pole inductor (5), having the same number of poles, are fixed on an axis of rotation (12) so that each salient pole (31) of the salient pole rotor (3) has the same phase angle in space as the corresponding salient pole (51) of the salient pole inductor (5), and the secondary windings (7) and excitation windings (9) wound on the corresponding salient poles are interconnected in the same direction to form closed circuits separately.
The secondary winding (7) is connected with the corresponding excitation winding (9) by two junction wires (10).
As shown in FIG. 1 the axis of rotation (12) with the salient pole rotor (3) and the salient pole inductor (5) fixed bn it is supported concentrically to the annular housing (11) by two pairs of bearings (13) and bearing caps (14) at both sides.
In FIG. 5 when an AC power supply with a certain frequency is input to the input terminals of the phase regulator (16) the primary winding (6) carries the primary current of the excitation transformer (1), and by the primary current of the excitation transformer (1) the main magnetic flux of the excitation transformer (1) is formed along a magnetic circuit consisting of stator salient pole (21) — * salient pole rotor gap (17) — ► salient pole (31) of the salient pole rotor (3) — ► yoke (32) of the salient pole rotor (3) — > salient pole (31) of the salient pole rotor (3) — ► salient pole rotor gap (17) — > stator salient pole (21) —> stator yoke (22) — ► stator salient pole (21). As a result, the transformer electromotive force and the rotating electromotive force are induced in the secondary windings (7) wound on the salient poles (31) of the salient pole rotor (3) under the stator salient poles (21) of the excitation transformer (1). Then the rotating electromotive force is cancelled because of equal magnitude and opposite direction, and the transformer electromotive force is supplied to the excitation windings (9) as an excitation source to flow the excitation current.
By the excitation current, an excitation magnetic field is formed, with the same frequency as the power supply input to the primary winding (6) of the excitation transformer (1), along a magnetic circuit consisting of salient pole (51) of the salient pole inductor (5) -* salient pole inductor gap (18) — * armature salient pole (41) — ► armature yoke (42) -> armature salient pole (41) —► salient pole inductor gap (18) —► s alient pole (51) of the salient pole inductor (5) → yoke (52) of the salient -pole inductor (5) → salient pole (51) of the salient pole inductor (5).
At that time, in case that the armature winding (8) is connected to a power supply with the same frequency as the excitation source, and the phases of the excitation current and armature current are accorded by the phase regulator (16), the rotor (19) rotates in a certain direction. In contrary, in case that the rotor (19) is rotated in a certain direction in the above excitation magnetic field, the rotating electromotive force with the same frequency as the power supply input to the primary winding (6) of the excitation transformer (1) is induced in file armature winding (8).
Figure imgf000009_0001
When a certain AC power supply is input to the primary winding (6) of the excitation transformer (1) and the armature winding (8) which are connected directly, the rotor (19) is rotated in a certain direction. At that time in order that fire phase difference of the excitation current and armature current is 180° it is necessary that the effective resistance of the primary winding (6) is negligibly small in comparison with its inductive resistance and the sum of the effective resistances of the secondary winding (7) and excitation winding (9) is negligibly small in comparison with the inductive resistance of the excitation winding (9).

Claims

CLAIMS What is claimed is:
1. A commutationless alternating-current machine, the machine comprises a stator (2) on which the primary winding (6) of an excitation transformer (1) having two input terminals where an AC power supply is input is wound, a salient pole rotor (3) which rotates inside the stator (2) and on each salient pole (31) of which the secondary winding (7) of the excitation transformer (1) that supplies the excitation source to an excitation winding (9) is separately wound, an armature (4) into which an armature winding (8) is inserted with two input/output terminals where an AC power supply is input or output, a salient pole inductor (5) which rotates inside the armature (4) and on each salient pole (51) of which the excitation winding (9) that produces an excitation magnetic field is separately wound, an annular housing (11) with the stator (2) and the armature (4) fixed in it, an axis of rotation (12) with the salient pole rotor (3) and the salient pole inductor (5) fixed on it, two bearings (13) and two bearing caps (14), and a phase regulator (16) which regulates die phase of the excitation current.
2. The commutationless alternating-current machine of claim 1, wherein the stator (2) comprises a stator yoke (22), 2XM stator salient poles (21) protruded inside and the primary winding (6) of the excitation transformer (1) which is wound with the same number of turns on each stator salient pole (21).
3. The commutationless alternating-current machine of claim 1, wherein the salient pole rotor (3) has more than 6xM salient poles (31), and the secondary windings (7) of the excitation transformer (1) with the same resistivity and diameter are wound on each salient pole (31) of the salient pole rotor (3) in the same direction and with the same number of turns.
4. The commutationless alternating-current machine of claim 1, wherein the armature (4) comprises an armature yoke (42), 2XM armature salient poles (41) protruded inside and the armature winding (8), and at the end of each armature salient pole (41) there are some slots (15) to insert the active edges (81) of the armature winding (8), and the active edges (81) are inserted into these slots (15).
5. The commutationless alternating-current machine of claim 1, wherein the salient pole inductor (5) has more than 6XM salient poles (51), and the excitation windings (9) with the same resistivity and diameter are wound on each salient pole (51) of the salient pole inductor (5) in the same direction and with the same number of turns.
6. The commutationless alternating-current machine of claim 1, wherein the stator (2) and the armature (4), having the same numbers of poles, are fixed in series inside the annular housing (11) so that each stator salient pole (21) has the same phase angle in space as the corresponding armature salient pole (41).
7. The commutationless alternating-current machine of claim 1, wherein the salient pole rotor (3) and the salient pole inductor (5), having the same number of poles, are fixed on an axis of rotation (12) so that each salient pole (31) of the salient pole rotor (3) has the same phase angle in space as the corresponding salient pole (51) of the salinet pole inductor (5), and the secondary windings (7) and excitation windings (9) wound on the corresponding salient poles are interconnected in the same direction to form closed circuits separately.
PCT/KP2023/000056 2022-07-30 2023-07-17 Commutationless alternating-current machine WO2024043351A2 (en)

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KP202210001092 2022-07-30
KPKP202210001092 2022-07-30

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4982123A (en) * 1989-11-17 1991-01-01 Sunstrand Corporation Integrated exciter generator and rotating transformer
CN103683689A (en) * 2013-12-27 2014-03-26 南昌康富电机技术有限公司 Multi-phase communication commutator generator
KR102293663B1 (en) * 2019-07-12 2021-08-26 주식회사 대흥기전 Double field winding brushless synchronous generator removing distortion of output
CN111262394B (en) * 2020-03-05 2021-06-25 东南大学 Brushless double-fed motor based on high-frequency rotary transformer
CN112712981A (en) * 2020-12-16 2021-04-27 中国航空工业集团公司金城南京机电液压工程研究中心 Brushless rotary transformer

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