CN113078747A - Novel brushless double-fed motor structure with adjustable magnetic field - Google Patents
Novel brushless double-fed motor structure with adjustable magnetic field Download PDFInfo
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- CN113078747A CN113078747A CN202110358877.8A CN202110358877A CN113078747A CN 113078747 A CN113078747 A CN 113078747A CN 202110358877 A CN202110358877 A CN 202110358877A CN 113078747 A CN113078747 A CN 113078747A
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- 238000004804 winding Methods 0.000 claims abstract description 27
- 230000004888 barrier function Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 230000010349 pulsation Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
- H02K1/265—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/12—Structural association with clutches, brakes, gears, pulleys or mechanical starters with auxiliary limited movement of stators, rotors or core parts, e.g. rotors axially movable for the purpose of clutching or braking
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/09—Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
本发明涉及电机技术领域，提出一种新型磁场可调无刷双馈电机结构，本发明结构无刷双馈电机气隙磁场可调，利于变速恒频恒压发电，可用于风力发电和船用轴带发电等场合。其技术方案关键为：电机为外定子内转子结构；电机转轴为可移动轴；定子2/6极12槽，两套绕组，绕组连接方式不同；定子每隔一个槽，槽底设置磁障；转子为绕线式转子，24槽，每隔一个转子齿开一个辅助槽。可移动轴使电机气隙磁密可调，磁障的引入可有效降低1次电枢反应磁场谐波，辅助槽可有效减小电机的转矩脉动。
The invention relates to the technical field of motors, and proposes a novel structure of a brushless doubly-fed motor with adjustable magnetic field. The brushless doubly-fed motor with adjustable magnetic field has an adjustable air-gap magnetic field, which is beneficial to variable-speed, constant-frequency, and constant-voltage power generation, and can be used for wind power generation and marine shafts. With power generation and other occasions. The key to its technical solution is: the motor is an outer stator and an inner rotor structure; the motor shaft is a movable shaft; the stator has 2/6 poles and 12 slots, two sets of windings, and the winding connection methods are different; every other slot of the stator is provided with a magnetic barrier at the bottom of the slot; The rotor is a wound rotor with 24 slots, and an auxiliary slot is opened every other rotor tooth. The movable shaft makes the air gap magnetic density of the motor adjustable, the introduction of the magnetic barrier can effectively reduce the harmonics of the first-order armature reaction magnetic field, and the auxiliary slot can effectively reduce the torque pulsation of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a novel brushless double-fed motor structure with an adjustable magnetic field.
Background
The brushless double-fed motor is mainly applied to the power generation fields of wind power, water power, shaft belts and the like as a generator, can realize variable-speed constant-frequency constant-voltage operation, and can improve the operation reliability and efficiency of a generator set.
The wind driven generator generally has a large number of poles, and the special operating condition of the wind driven generator puts high requirements on the reliability of the generator. The variable-speed constant-frequency power generation system adopting the brushless doubly-fed generator has the advantages of an alternating-current excitation generator, realizes brushless operation, improves the reliability of system operation, and is an important direction for future development of variable-speed constant-frequency power generation technology.
However, the speed change of wind power and shaft belts brings difficulty to the generator, the two sets of power windings of the brushless doubly-fed motor can realize variable-speed constant-frequency constant-voltage power generation to a certain extent, and when the speed is extreme, the rotor still catches an elbow, and the rotating shaft is adjustable, so that the air-gap magnetic field is adjustable, and the brushless doubly-fed motor is suitable for a larger range of rotating speed.
Disclosure of Invention
The invention aims to provide a brushless double-fed motor structure which is adjustable in air gap magnetic field and beneficial to variable-speed constant-frequency constant-voltage power generation.
In order to achieve the purpose, the invention adopts the following technical scheme: the motor is an outer stator inner rotor structure; the rotating shaft of the motor is a movable shaft; the stator 2/6 has 12 slots of poles, two sets of windings and different connection modes of the windings; magnetic barriers are arranged at the bottom of every two slots of the stator; the rotor is a wound rotor, 24 slots, and every other rotor tooth is provided with an auxiliary slot.
In the above technical scheme, the motor shaft can move along the axial direction, and the ratio of the axial movable distance to the length of the motor stator and the motor rotor is 1: 5.
in the technical scheme, the motor stator is provided with two sets of windings, one set of the windings is a power winding and is embedded on the left side of the stator slot, the other set of the windings is a control winding and is embedded on the right side of the stator slot, and the connection modes of the end parts of the two sets of the windings are different.
In the technical scheme, the motor has 12 stator slots, magnetic barriers are arranged at the bottom of every other slot, and 6 magnetic barriers with the same structure, material and size are arranged.
In the above technical solution, the motor has 24 rotor teeth, and every other rotor tooth has an auxiliary slot, and there are 12 rectangular auxiliary slots with the same structure and size.
The invention has the following beneficial effects: the movable shaft enables the air gap magnetic density of the motor to be adjustable, is beneficial to variable-speed constant-frequency constant-voltage power generation, and can be used for wind power generation and marine shaft power generation occasions. The introduction of the magnetic barrier increases the 1 st harmonic magnetic circuit magnetic resistance of the armature reaction magnetic field, the fundamental wave and other higher harmonic magnetic circuit magnetic resistances are basically not affected, and the structure can effectively reduce the 1 st harmonic of the armature reaction magnetic field under the condition of not sacrificing other harmonic of the armature reaction magnetic field. The auxiliary groove is beneficial to processing, and can reduce the cogging torque under the condition of not sacrificing the torque, thereby effectively reducing the torque pulsation of the motor.
Drawings
Fig. 1 is a structural schematic diagram of a novel brushless doubly-fed motor with an adjustable magnetic field according to the present invention.
As shown in fig. 1: 1, a stator; 2, magnetic barrier; 3 stator power winding; 4 stator control winding; 5, a rotor; 6 rotor auxiliary groove.
Fig. 2 is a schematic view of a movable shaft of the motor.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
Referring to fig. 1 and 2, a novel magnetic field adjustable brushless doubly-fed motor structure adopts the following technical scheme: the motor is an outer stator inner rotor structure; the rotating shaft of the motor is a movable shaft; the stator 2/6 has 12 slots of poles, two sets of windings and different connection modes of the windings; magnetic barriers are arranged at the bottom of every two slots of the stator; the rotor is a wound rotor, 24 slots, and every other rotor tooth is provided with an auxiliary slot.
Referring to fig. 2, the motor rotating shaft can move along the axial direction, and the ratio of the axial movable distance to the length of the motor stator and the motor rotor is 1: 5. the movable shaft enables the air gap magnetic density of the motor to be adjustable, is beneficial to variable-speed constant-frequency constant-voltage power generation, and can be used for wind power generation and marine shaft power generation occasions.
Referring to fig. 1, the motor stator has two sets of windings, one set of the windings is a power winding and is embedded in the left side of a stator slot, the other set of the windings is a control winding and is embedded in the right side of the stator slot, the connection modes of the end parts of the two sets of the windings are different, and the number of formed magnetic poles is also different.
Referring to fig. 1, the motor has 12 stator slots, and magnetic barriers are arranged at the bottom of every other slot, and 6 magnetic barriers with the same structure, material and size are arranged. The introduction of the magnetic barrier increases the 1 st harmonic magnetic circuit magnetic resistance of the armature reaction magnetic field, the fundamental wave and other higher harmonic magnetic circuit magnetic resistances are basically not affected, and the structure can effectively reduce the 1 st harmonic of the armature reaction magnetic field under the condition of not sacrificing other harmonic of the armature reaction magnetic field.
Referring to fig. 1, the motor has 24 rotor teeth, every other rotor tooth is provided with an auxiliary groove, and 12 rectangular auxiliary grooves with the same structure and size are formed. The auxiliary groove is beneficial to processing, and can reduce the cogging torque under the condition of not sacrificing the torque, thereby effectively reducing the torque pulsation of the motor.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110358877.8A CN113078747A (en) | 2021-04-02 | 2021-04-02 | Novel brushless double-fed motor structure with adjustable magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110358877.8A CN113078747A (en) | 2021-04-02 | 2021-04-02 | Novel brushless double-fed motor structure with adjustable magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113078747A true CN113078747A (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110358877.8A Pending CN113078747A (en) | 2021-04-02 | 2021-04-02 | Novel brushless double-fed motor structure with adjustable magnetic field |
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| Country | Link |
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| CN (1) | CN113078747A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286109A (en) * | 2000-03-30 | 2001-10-12 | Toshiba Corp | Rotating electric machine of permanent-magnetic reluctance type |
| CN101159401A (en) * | 2007-11-07 | 2008-04-09 | 中国矿业大学 | Brushless doubly-fed motor with hidden pole-cage rotor structure |
| CN201966773U (en) * | 2011-01-26 | 2011-09-07 | 广东华拿东方能源有限公司 | Composite rotor brushless doubly-fed alternating current motor |
| CN110492643A (en) * | 2019-06-19 | 2019-11-22 | 长江勘测规划设计研究有限责任公司 | It is suitble to the generator motor of seawater hydroenergy storage station |
| CN111224477A (en) * | 2020-01-19 | 2020-06-02 | 东华大学 | Parallel structure brushless mixed excitation synchronous generator based on harmonic winding excitation |
| CN111371274A (en) * | 2020-03-30 | 2020-07-03 | 东南大学 | Wide speed regulation type magnetic field modulation double-fed motor |
| CN111478543A (en) * | 2020-05-26 | 2020-07-31 | 山东理工大学 | Electric generator with low harmonic content for electric automobile |
| CN212012295U (en) * | 2020-04-23 | 2020-11-24 | 安徽机电职业技术学院 | Motor rotor structure and permanent magnet auxiliary synchronous reluctance motor |
| CN112564333A (en) * | 2020-12-16 | 2021-03-26 | 哈尔滨理工大学 | Novel brushless double-fed motor structure |
| CN112583150A (en) * | 2020-12-21 | 2021-03-30 | 哈尔滨理工大学 | Novel mixed rotor dual-frequency motor structure |
-
2021
- 2021-04-02 CN CN202110358877.8A patent/CN113078747A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286109A (en) * | 2000-03-30 | 2001-10-12 | Toshiba Corp | Rotating electric machine of permanent-magnetic reluctance type |
| CN101159401A (en) * | 2007-11-07 | 2008-04-09 | 中国矿业大学 | Brushless doubly-fed motor with hidden pole-cage rotor structure |
| CN201966773U (en) * | 2011-01-26 | 2011-09-07 | 广东华拿东方能源有限公司 | Composite rotor brushless doubly-fed alternating current motor |
| CN110492643A (en) * | 2019-06-19 | 2019-11-22 | 长江勘测规划设计研究有限责任公司 | It is suitble to the generator motor of seawater hydroenergy storage station |
| CN111224477A (en) * | 2020-01-19 | 2020-06-02 | 东华大学 | Parallel structure brushless mixed excitation synchronous generator based on harmonic winding excitation |
| CN111371274A (en) * | 2020-03-30 | 2020-07-03 | 东南大学 | Wide speed regulation type magnetic field modulation double-fed motor |
| CN212012295U (en) * | 2020-04-23 | 2020-11-24 | 安徽机电职业技术学院 | Motor rotor structure and permanent magnet auxiliary synchronous reluctance motor |
| CN111478543A (en) * | 2020-05-26 | 2020-07-31 | 山东理工大学 | Electric generator with low harmonic content for electric automobile |
| CN112564333A (en) * | 2020-12-16 | 2021-03-26 | 哈尔滨理工大学 | Novel brushless double-fed motor structure |
| CN112583150A (en) * | 2020-12-21 | 2021-03-30 | 哈尔滨理工大学 | Novel mixed rotor dual-frequency motor structure |
Non-Patent Citations (2)
| Title |
|---|
| 樊贝;胡堃;薛冰;: "不同转子结构的无刷双馈电机磁场调制的分析", 防爆电机, no. 03, 10 May 2012 (2012-05-10) * |
| 沈建新;蔡顺;郝鹤;金孟加;: "同步磁阻电机分析与设计(连载之五) 定子铁心的优化设计", 微电机, no. 12, 28 December 2016 (2016-12-28) * |
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