WO2019125347A4

WO2019125347A4 - Contra-rotating synchronous electro-mechanical converter

Info

Publication number: WO2019125347A4
Application number: PCT/UA2018/000138
Authority: WO
Inventors: Yevhenii MUSHINSKY; Vitalii MUSHYNSKYI; Mykhailo POROZOV
Original assignee: Mushinsky Yevhenii
Priority date: 2017-12-22
Filing date: 2018-12-20
Publication date: 2019-08-22
Also published as: UA124412C2; PL434592A1; WO2019125347A1; PL240640B1

Abstract

The invention relates primarily to electric machines for energy conversion, and more particular, to axial flux permanent magnet machines, and can be used as a contra-rotating one-stator synchronous electro-mechanical converter or contra- rotating synchronous electro-mechanical converter with multiple rotors and stators. A contra- rotating synchronous electro-mechanical converter comprises a rotor having a plurality of induction poles arranged about a central axis of rotation; and a stator including a plurality of segments separated from each other by air gaps. Each of the segments has at least two oppositely charged poles. The converter further comprises a plurality of permanent magnets each of which has at least two oppositely charged poles and is positioned between a different pair of adjacent stator segments. A rotor comprises at least a first rotor and a second rotor positioned on both sides of the stator, wherein both rotors are designed with a possibility of synchronous rotation about the central axis in opposite directions. Both rotors are composed of nonmagnetic material. A plurality of induction poles are composed, at least partially, of a magnetically soft material and are arranged on the first rotor and on the second rotor circumferentially with certain intervals between said poles. A control coil and an AC induction coil are wound on each stator segment. A plurality of permanent magnets is arranged between the stator segments on a circle that circumscribes the magnetic flux of the stator.

Claims

AMENDED CLAIMS received by the International Bureau on 19 jUNE 2019 (19.06.2019)

1. A contra-rotating synchronous electro-mechanical converter comprising a rotor having a plurality of magnetic flux switches (4) and (5) arranged about a central axis of rotation; and a stator (1) including a plurality of segments (6), each of which has induction coils (12) and (13) and a control coil (11), a plurality of permanent magnets (7) and (8), and a rotor position sensor, wherein the stator (1) housing is comprised an inner diamagnetic disk (14) and an outer diamagnetic disk

the rotor comprises at least a first rotor

(2) and a second rotor (3) positioned on both sides of the stator, wherein both rotors (2) and (3) are designed with a possibility of synchronous rotation about the central axis in opposite directions using a counter-rotating mean, and magnetic flux switches (4) and (5) are arranged on the first rotor (2) and the second rotor (3) on perimeter and are composed, at least partially, of a magnetically soft material, wherein permanent magnets (7) and (8) are placed on the stator (1) housing between the stator segments (6) in a circle and magnetized in an (N-S) (N-S) or (N-S) (S-N) fashion, wherein the stator segments (6) are separated from each other by an air gap and are held by an inner diamagnetic disk (14) and an outer diamagnetic disk (15).

2. The converter of claim 1, wherein an optical sensor or Hall Effect sensor are used as a rotor position sensor.

3. The converter of claim 1, wherein magnetic flux switches (4) of the first rotor (2) are displaced from magnetic flux switches (5) of the second rotor

(3) by half a pole pitch.

4. The converter of claim 1, wherein both rotors (2) and (3) are composed of a nonmagnetic material.

5. The converter of claim 1, wherein the first rotor and the second rotor have a serrated surface composed of a magnetically soft material.

6. The converter of claim 4, wherein the control coils (11) are connected in series, and the induction coils (12) and (13) are connected in parallel and in

19 series by forming least two parallel branches, one branch comprising at least two coils connected in series.

7, The converter of claim 1₁ wherein each stator segment has an H shape that forms teeth on the upper side of the stator and on the lower side of the stator.

8. The converter of claim 1 , wherein the counter-rotating mean is configured as a mechanical counter-rotating device or as an electrical counterrotating device.

9. The converter of claim 8, wherein a mechanical counter-rotating device is configured as a planetary or magnetic gear reducer having a gear ratio i = -1 connected to the first rotor and the second rotor.

10, The converter of claim 8, wherein a controller connected to position sensors of the first and second rotors is used to control the electrical counter-rotating device.

1 1. The converter of claim 3, wherein the first rotor and the second rotor are equipped with an equal number of magnetic flux switches.

12. The converter of claim 1, wherein comprising two or more stators (1) each of which is connected to both rotors (2) and (3), which positioned about one central axis and configured to rotate synchronically in opposite directions.

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STATEMENT UNDER ARTICLE 19 (1 )

A claim of the invention contains a set of features, which differs from document D1 {CN 204 578 318 U (UNIV NANJING INF SCI & TECH) 19 August 2015 (2015-08-19). But in respect to Written Opinion of the International Searching Authority an Applicant filed an amended claim under Article 19 of PCT which contains a corrected set of features.

The proposed machine in document D1 is a hybrid electric axial magnetic axial magnetic field with fixed magnetic flux magnets belongs to the field-controlled axial- flux permanent-magnet (FCAFPM) machine. The claimed electric machine is a type of a flux-switching permanent magnet machine (FSPM). The FCAFPM machine (Dl) is designed to control magnetic flux to increase the range of speed control. In Dl, the magnetic branches of the rotors are separate only when both rotors are magnetically symmetrical [0011] and {Fig. 2, item 2), otherwise {in counter- rotational rotation) the flows will be mixed, causing the pulsation of the forces of gravity of the rotors in the axial direction. The steel poles (Fig.l, 2, item 3) serve as conductors of scattering streams when adjusting the magnetic field in the gap and are not switches. Segments of the stator (4) do not have an air gap since the main magnetic field is created by magnets (2) located on two rotors. Magnets (5) do not create the mainstream, but only change it, so they can not participate in the description.

Thus;

- the electric machine FCAFPM (Dl) does not work as a contra-rotating;

- the steel poles (Fig.l, 2, item 3) are not switches;

- the stator {4) is different in design and does not have air gaps;

- the magnets (5) perform a different function and can not participate in the comparison.

Thus, the amended claims under Article 19 of the PCT contain a set of features which distinguishes the claimed invention from the prior art and makes it corresponding to the criteria of inventive step.

Therefore amended claims are not obvious to those known in the prior art in view of Dl in the sense of art. 33 of PCT.

Also, the Applicant draws attention to the observation of an Expert of the International Searching Authority that in Claim 9 the "electrical’¹ counter-rotating device is correctly indicated. In the description, as a result of an incorrect translation from Ukrainian to English, translated as "electronic" counter-rotating device. This is incorrect. The Applicant asks to accept in the description the definition "electronic counter-rotating device" as "electrical counter-rotating device".

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