CN116846106B - Permanent magnet generator with low magnetic density distortion rate and voltage-stabilizing power generation system - Google Patents
Permanent magnet generator with low magnetic density distortion rate and voltage-stabilizing power generation system Download PDFInfo
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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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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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
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
本发明提供一种低磁密畸变率的永磁发电机与稳压发电系统，属于汽车电机电器技术领域。转子铁芯上均布有偶数个第一磁钢槽，第一磁钢槽的右侧设有隔磁槽，第一磁钢槽的外侧和隔磁槽的外侧共同设有V形磁钢槽，V形磁钢槽的右侧边与隔磁槽之间设有第二磁钢槽，第一磁钢槽、V形磁钢槽与第二磁钢槽内均放置有永磁钢，该电机采用第一磁钢槽和隔磁槽组合的非对称内层磁极组结构，可以降低磁钢漏磁率，减轻电机质量，非对称内磁极组结构的外侧设置第二磁钢槽与V形磁钢槽，将发电机在单个磁极外侧分成三段式极弧长度，使气隙磁密趋于正弦分布，降低磁密畸变率，同时解决因气隙磁阻改变导致电机损耗大的问题，提高电机效率。
The present invention provides a permanent magnet generator and a voltage-stabilized power generation system with low magnetic flux density distortion rate, belonging to the technical field of automobile motor and electrical appliances. An even number of first magnetic steel slots are evenly distributed on the rotor core, a magnetic isolation slot is provided on the right side of the first magnetic steel slot, a V-shaped magnetic steel slot is provided on the outer side of the first magnetic steel slot and the outer side of the magnetic isolation slot, a second magnetic steel slot is provided between the right side of the V-shaped magnetic steel slot and the magnetic isolation slot, and permanent magnets are placed in the first magnetic steel slot, the V-shaped magnetic steel slot and the second magnetic steel slot. The motor adopts an asymmetric inner magnetic pole group structure composed of the first magnetic steel slot and the magnetic isolation slot, which can reduce the magnetic flux leakage rate of the magnetic steel and reduce the weight of the motor. The second magnetic steel slot and the V-shaped magnetic steel slot are provided on the outer side of the asymmetric inner magnetic pole group structure, and the generator is divided into three-section pole arc lengths on the outer side of a single magnetic pole, so that the air gap magnetic flux tends to be sinusoidally distributed, reducing the magnetic flux distortion rate, and at the same time solving the problem of large motor loss due to the change of air gap magnetic resistance, thereby improving the motor efficiency.
Description
技术领域Technical Field
本发明提供一种低磁密畸变率的永磁发电机与稳压发电系统，属于汽车电机电器技术领域。The invention provides a permanent magnet generator with low magnetic flux density distortion rate and a voltage-stabilized power generation system, belonging to the technical field of automobile motor and electrical appliances.
背景技术Background technique
目前汽车用永磁电机的转子大多采用均匀磁极结构，如现有技术，专利名称：混合永磁与电磁复合励磁发电机，专利号：ZL201210119304.0，公开了如下技术方案，永磁转子包括第一矩形磁钢、非导磁槽楔、第二矩形磁钢，第一矩形磁钢放置在径向矩形槽内，第二矩形磁钢放置在相邻两个径向矩形槽内端之间的切向矩形槽内，该结构转子的第二磁钢置于相邻两个第一磁钢内端之间，为防止磁钢漏磁，第二磁钢在垂直于直径方向上的长度近似等于相邻两个第一磁钢内端之间的距离，导致永磁体浪费，材料利用率低，且第二磁钢置于内端，聚集磁场的能力弱，磁密谐波大，磁密畸变率高，导致电机总体效率低，其使用性能有待于进一步改进。At present, most of the rotors of permanent magnet motors for automobiles adopt a uniform magnetic pole structure, such as the prior art, patent name: hybrid permanent magnet and electromagnetic composite excitation generator, patent number: ZL201210119304.0, which discloses the following technical scheme: the permanent magnet rotor includes a first rectangular magnetic steel, a non-magnetic slot wedge, and a second rectangular magnetic steel. The first rectangular magnetic steel is placed in a radial rectangular slot, and the second rectangular magnetic steel is placed in a tangential rectangular slot between the inner ends of two adjacent radial rectangular slots. The second magnetic steel of the rotor of this structure is placed between the inner ends of two adjacent first magnetic steels. To prevent magnetic steel leakage, the length of the second magnetic steel in the direction perpendicular to the diameter is approximately equal to the distance between the inner ends of two adjacent first magnetic steels, resulting in waste of permanent magnets and low material utilization. In addition, the second magnetic steel is placed at the inner end, and the ability to gather the magnetic field is weak, the magnetic flux harmonics are large, and the magnetic flux distortion rate is high, resulting in low overall efficiency of the motor, and its performance needs to be further improved.
发明内容Summary of the invention
本发明要解决的技术问题是：在保证不增加加工工序、工艺难度和电机成本不发生大改变的前提下，克服现有技术的不足，提供一种低磁密畸变率的永磁发电机与稳压发电系统，该电机结构为分段聚磁的永磁发电机，采用磁钢槽和隔磁槽组合的非对称内磁极组结构，将发电机在单个磁极外侧分成三段式极弧长度，使气隙磁密趋于正弦分布，降低磁密畸变率，提高电机效率。The technical problem to be solved by the present invention is: under the premise of ensuring that the processing procedures are not increased, the process difficulty and the motor cost are not greatly changed, the shortcomings of the prior art are overcome, and a permanent magnet generator and a voltage-stabilized power generation system with low magnetic flux distortion rate are provided. The motor structure is a segmented magnetic-concentrating permanent magnet generator, which adopts an asymmetric inner magnetic pole group structure composed of magnetic steel slots and magnetic isolation slots, and divides the generator into three sections of pole arc length on the outside of a single magnetic pole, so that the air gap magnetic flux tends to a sinusoidal distribution, reduces the magnetic flux distortion rate, and improves the motor efficiency.
本发明为解决其技术问题所采用的技术方案为：一种低磁密畸变率的永磁发电机，包括稳压控制器、转轴、前端盖、定子、后端盖、转子铁芯、第一磁钢槽、隔磁槽、V形磁钢槽、第二磁钢槽、永磁钢，其特征在于：The technical solution adopted by the present invention to solve the technical problem is: a permanent magnet generator with low magnetic flux density distortion rate, including a voltage stabilizing controller, a rotating shaft, a front cover, a stator, a rear cover, a rotor core, a first magnetic steel slot, a magnetic isolation slot, a V-shaped magnetic steel slot, a second magnetic steel slot, and a permanent magnet, characterized in that:
转子铁芯沿圆周方向上均布有偶数个第一磁钢槽，第一磁钢槽呈切向结构；The rotor core is evenly distributed with an even number of first magnetic steel slots along the circumferential direction, and the first magnetic steel slots are in a tangential structure;
第一磁钢槽的右侧设有隔磁槽，隔磁槽呈切向结构，隔磁槽的左端和第一磁钢槽的右端连通；A magnetic isolation groove is provided on the right side of the first magnetic steel groove, the magnetic isolation groove is a tangential structure, and the left end of the magnetic isolation groove is connected to the right end of the first magnetic steel groove;
第一磁钢槽的外侧和隔磁槽的外侧共同设有V形磁钢槽，V形磁钢槽的对称轴线、第一磁钢槽的右端和隔磁槽的左端均经过所在磁极的中心线，V形磁钢槽的外端与转子铁芯外圆有1.5mm的不连通距离；A V-shaped magnetic steel groove is provided on the outer side of the first magnetic steel groove and the outer side of the magnetic isolation groove. The symmetry axis of the V-shaped magnetic steel groove, the right end of the first magnetic steel groove and the left end of the magnetic isolation groove all pass through the center line of the magnetic pole. The outer end of the V-shaped magnetic steel groove is 1.5 mm away from the outer circle of the rotor core.
V形磁钢槽的右边内侧与隔磁槽外侧之间设有第二磁钢槽，第二磁钢槽的内端靠近隔磁槽的左端且有1.5mm的不连通距离，第二磁钢槽的外端向V形磁钢槽右侧的转子铁芯外圆部分延伸且有1.5mm的不连通距离；A second magnetic steel slot is provided between the right inner side of the V-shaped magnetic steel slot and the outer side of the magnetic isolation slot, the inner end of the second magnetic steel slot is close to the left end of the magnetic isolation slot and has a non-connected distance of 1.5 mm, and the outer end of the second magnetic steel slot extends to the outer circumference of the rotor core on the right side of the V-shaped magnetic steel slot and has a non-connected distance of 1.5 mm;
第二磁钢槽的外端、隔磁槽的右端与转子铁芯圆心在同一直线上。The outer end of the second magnetic steel slot, the right end of the magnetic isolation slot and the center of the rotor core are in the same straight line.
第一磁钢槽、V形磁钢槽与第二磁钢槽内均放置有永磁钢，相邻V形磁钢槽内的永磁钢外侧面的极性相反，V形磁钢槽内的永磁钢外侧面的极性与V形磁钢槽内侧的第一磁钢槽、第二磁钢槽内的永磁钢外侧面的极性相同。Permanent magnets are placed in the first magnetic steel groove, the V-shaped magnetic steel groove and the second magnetic steel groove. The polarities of the outer sides of the permanent magnets in adjacent V-shaped magnetic steel grooves are opposite, and the polarity of the outer sides of the permanent magnets in the V-shaped magnetic steel groove is the same as the polarity of the outer sides of the permanent magnets in the first magnetic steel groove and the second magnetic steel groove inside the V-shaped magnetic steel groove.
V形磁钢槽右端与第二磁钢槽的外端之间的极弧长度等于V形磁钢槽的极弧，V形磁钢槽的极弧长度等于第一磁钢槽的左端和隔磁槽的右端之间对应极弧长度的1/3The pole arc length between the right end of the V-shaped magnetic steel slot and the outer end of the second magnetic steel slot is equal to the pole arc of the V-shaped magnetic steel slot, and the pole arc length of the V-shaped magnetic steel slot is equal to 1/3 of the corresponding pole arc length between the left end of the first magnetic steel slot and the right end of the magnetic isolation slot.
一种稳压发电系统，包括发电机和稳压控制器，其特征在于：所述发电机为所述的一种低磁密畸变率的永磁发电机。A voltage-stabilized power generation system includes a generator and a voltage-stabilized controller, wherein the generator is a permanent magnet generator with a low magnetic flux density distortion rate.
本发明与现有技术相比，具备如下技术效果：Compared with the prior art, the present invention has the following technical effects:
（1）采用磁钢槽和隔磁槽组合的非对称内磁极组结构，可以降低磁钢漏磁率，同时减轻电机质量；(1) The asymmetric inner magnetic pole group structure composed of magnetic steel slots and magnetic isolation slots can reduce the magnetic steel leakage rate and reduce the motor mass;
（2）非对称内磁极组结构的外侧设置斜磁钢槽与V形磁钢槽，将发电机在单个磁极外侧分成三段式极弧长度，使气隙磁密趋于正弦分布，降低磁密畸变率；(2) Oblique magnetic steel grooves and V-shaped magnetic steel grooves are arranged on the outside of the asymmetric inner magnetic pole group structure, and the generator is divided into three sections of pole arc length on the outside of a single magnetic pole, so that the air gap magnetic flux tends to be sinusoidally distributed and the magnetic flux distortion rate is reduced;
（3）不需转子铁芯外圆开槽或设置非均匀气隙结构，转子铁芯冲片加工工艺简单，降低电机转子生产成本，同时解决因气隙磁阻改变导致电机损耗大的问题，提高电机效率；(3) There is no need to slot the outer circle of the rotor core or set a non-uniform air gap structure. The rotor core punching process is simple, which reduces the production cost of the motor rotor. At the same time, it solves the problem of large motor losses caused by changes in air gap magnetic resistance and improves motor efficiency.
（4）磁极内层靠近永磁钢，设置单个隔磁槽，保证低漏磁率，同时降低电机故障率，增强电机使用寿命；(4) The inner layer of the magnetic pole is close to the permanent magnet steel, and a single magnetic isolation slot is set to ensure a low magnetic leakage rate, while reducing the motor failure rate and extending the motor service life;
（5）通过改变磁极布置方式，增大交轴磁阻，削弱电枢反应。(5) By changing the arrangement of magnetic poles, the cross-axis magnetic resistance is increased and the armature reaction is weakened.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明的电机结构示意图。FIG. 1 is a schematic diagram of the motor structure of the present invention.
图2是本发明的转子结构示意图。FIG. 2 is a schematic diagram of the rotor structure of the present invention.
图中：1、稳压控制器；2、转轴；3、后端盖；4、前端盖；5、定子； 6、转子铁芯；7、第一磁钢槽；8、隔磁槽；9、V形磁钢槽；10、第二磁钢槽。In the figure: 1, voltage regulator controller; 2, rotating shaft; 3, rear end cover; 4, front end cover; 5, stator; 6, rotor core; 7, first magnetic steel slot; 8, magnetic isolation slot; 9, V-shaped magnetic steel slot; 10, second magnetic steel slot.
实施方式Implementation
下面结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings.
一种低磁密畸变率的永磁发电机，包括稳压控制器1、转轴2、前端盖4、定子5、后端盖3、转子铁芯6、第一磁钢槽7、隔磁槽8、V形磁钢槽9、第二磁钢槽10、永磁钢，其特征在于：A permanent magnet generator with low magnetic flux density distortion rate, comprising a voltage stabilizing controller 1, a rotating shaft 2, a front cover 4, a stator 5, a rear cover 3, a rotor core 6, a first magnetic steel slot 7, a magnetic isolation slot 8, a V-shaped magnetic steel slot 9, a second magnetic steel slot 10, and permanent magnet steel, characterized in that:
转子铁芯6沿圆周方向上均布有偶数个第一磁钢槽7，第一磁钢槽7呈切向结构；The rotor core 6 is evenly distributed with an even number of first magnetic steel slots 7 along the circumferential direction, and the first magnetic steel slots 7 are in a tangential structure;
第一磁钢槽7的右侧设有隔磁槽8，隔磁槽8呈切向结构，隔磁槽8的左端和第一磁钢槽7的右端连通；A magnetic isolation groove 8 is provided on the right side of the first magnetic steel groove 7. The magnetic isolation groove 8 is a tangential structure. The left end of the magnetic isolation groove 8 is connected to the right end of the first magnetic steel groove 7.
第一磁钢槽7的外侧和隔磁槽8的外侧共同设有V形磁钢槽9，V形磁钢槽9的对称轴线、第一磁钢槽7的右端和隔磁槽8的左端均经过所在磁极的中心线，V形磁钢槽9的外端与转子铁芯6外圆有1.5mm的不连通距离；The outer side of the first magnetic steel slot 7 and the outer side of the magnetic isolation slot 8 are both provided with a V-shaped magnetic steel slot 9, the symmetry axis of the V-shaped magnetic steel slot 9, the right end of the first magnetic steel slot 7 and the left end of the magnetic isolation slot 8 all pass through the center line of the magnetic pole, and the outer end of the V-shaped magnetic steel slot 9 is 1.5 mm away from the outer circle of the rotor core 6;
V形磁钢槽9的右边内侧与隔磁槽外侧8之间设有第二磁钢槽10，第二磁钢槽10的内端靠近隔磁槽8的左端且有1.5mm的不连通距离，第二磁钢槽10的外端向V形磁钢槽9右侧的转子铁芯6外圆部分延伸且有1.5mm的不连通距离；A second magnetic steel slot 10 is provided between the right inner side of the V-shaped magnetic steel slot 9 and the outer side 8 of the magnetic isolation slot. The inner end of the second magnetic steel slot 10 is close to the left end of the magnetic isolation slot 8 and has a non-connected distance of 1.5 mm. The outer end of the second magnetic steel slot 10 extends to the outer circumference of the rotor core 6 on the right side of the V-shaped magnetic steel slot 9 and has a non-connected distance of 1.5 mm.
第二磁钢槽10的外端、隔磁槽8的右端与转子铁芯6圆心在同一直线上。The outer end of the second magnetic steel slot 10 , the right end of the magnetic isolation slot 8 and the center of the rotor core 6 are on the same straight line.
第一磁钢槽7、V形磁钢槽9与第二磁钢槽10内均放置有永磁钢，相邻V形磁钢槽9内的永磁钢外侧面的极性相反，V形磁钢槽9内的永磁钢外侧面的极性与V形磁钢槽9内侧的第一磁钢槽7、第二磁钢槽10内的永磁钢外侧面的极性相同。Permanent magnets are placed in the first magnetic steel slot 7, the V-shaped magnetic steel slot 9 and the second magnetic steel slot 10. The polarities of the outer sides of the permanent magnets in adjacent V-shaped magnetic steel slots 9 are opposite. The polarity of the outer sides of the permanent magnets in the V-shaped magnetic steel slot 9 is the same as the polarity of the outer sides of the permanent magnets in the first magnetic steel slot 7 and the second magnetic steel slot 10 inside the V-shaped magnetic steel slot 9.
V形磁钢槽9右端与第二磁钢槽10的外端之间的极弧长度等于V形磁钢槽9的极弧长度，V形磁钢槽9的极弧长度等于第一磁钢槽7的左端和隔磁槽8的右端之间对应极弧长度的1/3。The pole arc length between the right end of the V-shaped magnetic steel slot 9 and the outer end of the second magnetic steel slot 10 is equal to the pole arc length of the V-shaped magnetic steel slot 9, and the pole arc length of the V-shaped magnetic steel slot 9 is equal to 1/3 of the corresponding pole arc length between the left end of the first magnetic steel slot 7 and the right end of the magnetic isolation slot 8.
一种稳压发电系统，包括发电机和稳压控制器，其特征在于：所述发电机为所述的一种低磁密畸变率的永磁发电机。A voltage-stabilized power generation system includes a generator and a voltage-stabilized controller, wherein the generator is a permanent magnet generator with a low magnetic flux density distortion rate.
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| KR20080085772A (en) * | 2007-03-20 | 2008-09-24 | 가부시키가이샤 야스카와덴키 | Electronic steel plate forming body, electronic steel plate stack, rotor for permanent magnet type synchronous rotary electric machine having same, permanent magnet type synchronous rotary electric machine, vehicle, elevator, fluid machine, processing machine using the rotary electric machine |
| CN109450133A (en) * | 2018-11-06 | 2019-03-08 | 山东理工大学 | A kind of oblique V-type set magnet permanent synchronization motor of electric car |
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| KR20080085772A (en) * | 2007-03-20 | 2008-09-24 | 가부시키가이샤 야스카와덴키 | Electronic steel plate forming body, electronic steel plate stack, rotor for permanent magnet type synchronous rotary electric machine having same, permanent magnet type synchronous rotary electric machine, vehicle, elevator, fluid machine, processing machine using the rotary electric machine |
| CN109450133A (en) * | 2018-11-06 | 2019-03-08 | 山东理工大学 | A kind of oblique V-type set magnet permanent synchronization motor of electric car |
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