CN202737715U - High-speed rotor skewed magnetic pole brushless permanent magnet direct-current motor - Google Patents
High-speed rotor skewed magnetic pole brushless permanent magnet direct-current motor Download PDFInfo
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- CN202737715U CN202737715U CN 201220268639 CN201220268639U CN202737715U CN 202737715 U CN202737715 U CN 202737715U CN 201220268639 CN201220268639 CN 201220268639 CN 201220268639 U CN201220268639 U CN 201220268639U CN 202737715 U CN202737715 U CN 202737715U
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Abstract
A high-speed rotor skewed magnetic pole brushless permanent magnet direct-current motor comprises a motor shell body, a stator silicon steel stamped sheet, a multi-strand coil winding and magnetic steel permanent magnets. Permanent magnet inner chambers are arranged in tooth slots of the silicon steel stamped sheet of a motor rotor core. The high-speed rotor skewed magnetic pole brushless permanent magnet direct-current motor is characterized in that: rotor magnet inner chamber magnetic poles are skewed poles; a rotating shaft and the rotor magnet inner chamber magnetic poles are skewed magnetic poles; and rotor magnetic poles are skewed. A tooth groove stator of the motor iron core interacts with the rotor permanent magnets so as to generate to a reluctance torque. The fractional-slot winding technology is adopted. With the high-speed rotor skewed magnetic pole brushless permanent magnet direct current motor adopted, a tooth slot torque and starting current, motor vibration and noise can be effectively reduced.
Description
Technical field
The utility model relates to permanent-magnet brushless DC electric machine, particularly a kind of magnetic pole of brshless DC motor.
Technical background
World is all at the various various permanent-magnet brushless DC electric machines of research, the multiple formula of putting of its structure, but be reluctance torque existing cogging torque aspect " non-brush permanent-magnet DC motor " production technology, only have when reluctance torque less than 1 the time, can reach that motor is convenient to starting, energy-conserving and environment-protective, vibration is little, noise is little, in present motor, since control signal, the sensing distortion.
The cost of rotor core silicon steel punching in the manufacturing is high; The problems such as power of motor compared low, and the loss of electric machine is large, and starting current is large, and noise is large, and vibration is large, and the battery operating range is short.
The utility model content
For the deficiencies in the prior art, the utility model provides a kind of high speed rotor oblique magnetic pole brushless permanent magnet DC motor.Solved the main power motor of high-end electric automobile, starting current is large, the difficult problem of motor oscillating and noise.
To achieve these goals, technical solution adopted in the utility model is:
The oblique magnetic pole brushless permanent magnet DC motor of high speed rotor, comprise electric machine casing, the punching of stator silicon steel, multiply coil windings and set magnet permanent body, be equipped with the permanent magnet inner room in the silicon steel punching teeth groove silicon steel punching of motor rotor core, rotor magnet inner room magnetic pole is that the oblique utmost point, rotating shaft and rotor magnet inner room magnetic pole are oblique magnetic pole, rotor magnetic pole skew.
Rotor is fractional slot winding, and the punching of rotor silicon steel laminates the field frame assembly skewed slot that cast aluminium forms, and magnetic pole places magnetic pole permanent magnet inner room for watt oblique magnetic pole of shape permanent magnet, is equipped with many group magnetic pole watt shape permanent magnets in the rotor assembly skewed slot.
Rotor is provided with rotor-position sensor.
The beneficial effects of the utility model: because of the reluctance torque that the teeth groove stator of electric machine iron core and rotor permanent magnet interact and produce, employing fractional slot winding technology.Effectively reduce cogging torque, reduce starting current motor oscillating and noise.The utility model improves the high reliability of permanent-magnet brushless DC electric machine and is convenient to control, is the main power motor of high-end electric automobile.Rotor position sensing technology etc. consist of the oblique magnetic pole brushless permanent magnet DC motor of high speed rotor.The reluctance torque that interacts and produce because of the teeth groove stator of electric machine iron core and rotor permanent magnet.
Description of drawings
The structural representation of Fig. 1, the utility model rotor;
The structural representation of Fig. 2, the utility model stator.
Embodiment
The oblique magnetic pole of rotor is the oblique magnetic pole of segmented, and magnetic pole dislocation skew reduces the torque of first-harmonic groove; The oblique magnetic pole of fractional slot winding high speed rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor, this DC Brushless Motor rotor is fractional slot winding, rotor silicon steel punching 1 laminates cast aluminium, and to form field frame assembly be skewed slot 12, magnet steel 11 is oblique magnetic pole, and magnetic pole places magnetic pole permanent magnet inner room for watt oblique magnetic pole of shape permanent magnet, is equipped with many group magnetic pole watt shape permanent magnets in the rotor assembly skewed slot, the punching of rotor silicon steel laminates the rotor assembly that cast aluminium forms, and rotor silicon steel punching 1 is positioned at stator silicon steel plate 2.
The rotor winding is fractional slot winding, and so-called fractional slot winding refers to that every extremely every phase groove number is a mark, and general expression is q=b+ " c/d ", and b is the integer that formula q=z/2pm obtains in the formula; C/d be can not be about mark, the remaining groove number after the c representative is divided exactly, d then represents number of magnet poles in the unit motor that will analyze.Fractional-slot can be with interior magnet rotor and outer magnet rotor, and it can many magnetic poles, the slow-speed of revolution, the DC Brushless Motor rotor of large torque.
The oblique magnetic pole brushless permanent magnet DC motor of described high speed rotor field frame assembly is skewed slot, it is skewed slot that the punching of stator silicon steel is overrided to form field frame assembly, skewed slot is built-in with the multiply coil windings, it is oblique magnetic pole that multiply coil windings and the punching of rotor silicon steel are overrided to form the rotor magnetic pole permanent magnet, consists of the motor core component.
The oblique magnetic pole of high speed rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor magnetic pole is oblique magnetic pole, place magnetic pole permanent magnet inner room, be equipped with many group magnetic pole permanent magnet inner rooms in the rotor assembly skewed slot, be equipped with many group N sheet magnet steel watt shape permanent magnets in the rotor silicon steel punching assembly inner room, form the permanent magnet direct current motor rotor assembly.
The oblique magnetic pole of high speed rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor magnetic pole permanent magnet is the segmented dislocation, and tiltedly magnetic pole is the segmented dislocation, the dislocation of rotor magnetic pole segmented, segments NS=3, every section offsetting angle θ S_S are expressed as θ S_S=θ _ SK/N_S=" 360 " degree/(N_CN_S).The rotor magnetic pole permanent magnet is the skew of segmented misconstruction magnetic pole.
The oblique magnetism method of the oblique magnetic pole of described high speed rotor, deviation angle θ _ shj are respectively θ _ shj=(" 360 " ^0(j-1))/(2_pN_c) j=1,2 ..., what 2_p was used is the motor pole migration technology.
The oblique magnetic pole of high speed rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor, magnetic pole is the tile-shaped magnet steel permanent magnet, the oblique magnetic pole segmented of rotor mode, place the punching of rotor silicon steel to be overrided to form iron core, the two ends of silicon steel sheet core have end plate to cast aluminium to become fan-shaped fixed stator iron core tile-shaped magnet steel permanent magnet and reduce doing of temperature and use magnet steel.
Propose in the mill the rotor position sensing technology, the disk sensor-based system is to solve the hall sensing signal to cause the motor electronic exchange to the problem of distorted signals.Adopt the disk sensor-based system, easy to adjust in the time of will adjusting sensor-based system in manufacturing and maintenance process, maintenance process is convenient.
Technical scheme A: the oblique magnetic pole of high speed rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor skewed stator slot, the oblique magnetic pole of rotor, the oblique magnetic pole of rotor or rotor magnetic pole segment fault method for position.Each produces the least common multiple NC that existing cogging torque primitive period number equals number of stator slots Z and number of poles 2p rotor, and namely a mechanical angle θ 1 corresponding to cogging torque primitive period is=360 degree/N_C.Therefore, if the oblique polar angle θ of skewed stator core slot angle or rotor magnetic pole SK is equal with it, can eliminate the first-harmonic of cogging torque: θ SK=360 degree/N_C.For integer groove motor, NC=Z, skewed slot angle θ SK, θ SK=360 degree/Z.But it is to be noted, it can make back electromotive force and output electromagnetic torque descend to some extent simultaneously.Skewed stator slot also makes the winding embedding increase around difficulty.And, when skewed stator slot or skewed-rotor are switched at the motor winding, can produce additional axial force.The axial force size is relevant with angle of bevel.In order easily to implement on the manufacturing process, adopt the effect of the approximate oblique utmost point of rotor magnetic pole segment fault method for position, segments NS=3, offsetting angle θ _ SS, θ _ SS=θ SK/N_S=360 degree/(N_C N_S).The different segments NS of rotor magnetic pole is to reducing the effect of cogging torque, and along with segments NS increases, the amplitude of cogging torque progressively reduces, and is 2,3,4 o'clock in addition when segments NS divides, and remaining torque variation number of times increases, and mainly is 2,3,4 subharmonic.The effect that reduces cogging torque when rotor magnetic pole divides 4 sections is fine, and segments is 5 o'clock, and cogging torque can have been ignored fully.The fractional-slot situation, if fractional-slot concentrates the every grade of groove of whenever thinking of winding to count q and be expressed as q=c/d, the least common multiple Nc=dZ of Z and 2p then.The general expression of skewed slot angle θ _ SK and q value relation is θ SK=360 degree/dZ.For the fractional-slot motor, when adopting skewed stator slot or skewed-rotor method to reduce cogging torque, skewed stator slot angle or skewed-rotor angle are less than a stator slot elongation, and be less many than integer groove motor, they are relevant with the q value, only need the 1/d of a stator slot elongation to get final product.From the skewed slot technological angle, fractional-slot also is to select preferably.
Technical scheme B: the oblique magnetic pole of high speed rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor adopt offset method.According to scheme 1, thinking along the dislocation of axial segmentation magnetic pole, in order to weaken cogging torque, paste the magnetic sheet multipolar dynamo for the surface, 2p pole piece made into to be offset in the circumferential direction of the circle from original evenly position, their deviation angle θ _ shj is respectively θ _ shj=(360 degree (j-1))/(2_pN_c) j=1,2 ... 2_p does like this, being equivalent to has segmentation magnetic pole 2p section within a first-harmonic cogging torque cycle, like this, except 2p time and multiple subharmonic, other cogging torques are all weakened.Because harmonic number superelevation amplitude is less, so total cogging torque is weakened.When arranging 2p magnetic pole, needn't necessarily press the natural number order of j, can arrange flexibly: taking the locus possibility into account on the one hand, is to consider that the magnetic pole skew may cause the imbalance problem of rotor in addition.This method also is feasible for embedded rotor.
Technical scheme C: in conjunction with Fig. 1, shown in, the oblique magnetic pole of the high speed rotor of the present embodiment, magnetic pole segmented dislocation brushless permanent magnet DC motor motor adopts fractional slot winding, the fractional slot winding motor that has same groove to count Z is compared with integer groove winding electric machine, first-harmonic groove torque periodicity increases d doubly, there is the fractional slot winding motor of identical number of poles to compare with integer groove winding electric machine, the evaluation factor CT of cogging torque has reduced d doubly, and this analysis clearly demonstrates adopts the fractional slot winding motor to be conducive to reduce cogging torque.The oblique magnetic pole of rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor comprises: be provided with stator silicon steel sheet in the electric machine casing, with the DC motor rotor silicon steel sheet, stator core is provided with winding coil, rotor shaft, be provided with the magnetic core that discoid steel disc multilayer builds up, the magnetic core external rotor is fixed with the armature spindle machine fro, and motor is provided with the position sensing element that magnetic pole transducer magnet steel and two groups of six Hall elements such as comprises.The transducer magnet steel is located in the magnet steel seat, waits magnetic pole transducer magnet steel seat to be fixed in the DC motor rotor rotating shaft, waits magnetic pole transducer magnet steel and six Hall elements to be located in the cavity of drive motors circuit board Hall disc formation.
Deng the magnetic pole sensor technology; The magnet ring that is spliced by multi-disc discrete magnetic pole Deng magnetic pole transducer magnet steel.
The oblique magnetic pole of described high speed rotor, magnetic pole segmented dislocation brushless permanent magnet DC motor, motor adopts fractional slot winding, the fractional slot winding motor that has same groove to count Z is compared with integer groove winding electric machine, first-harmonic groove torque periodicity increases d doubly, have the fractional slot winding motor of identical number of poles to compare with integer groove winding electric machine, the evaluation factor CT of cogging torque has reduced d doubly, and this analysis clearly demonstrates adopts the fractional slot winding motor to be conducive to reduce the torque of teeth groove first-harmonic.This patent fractional slot winding technology and the oblique utmost point of rotor magnetic pole, rotor magnetic pole segmented dislocation technology solve the torque of rotor first-harmonic groove, with the oblique utmost point groove angle of stator core or rotor magnetic pole oblique angle technology; Rotor magnetic pole segmentation dislocation and oblique magnetic technology; The magnetic pole migration technology, the punching of rotor silicon steel, crown is opened the auxiliary flute technology, the oblique utmost point of rotor magnetic pole, the dislocation of rotor magnetic pole segmented.Drive sensing by the circuit board Hall element and wait the magnetic pole transducer to form permanent-magnet brushless DC electric machine rotor core assembly.Stator silicon steel punching skewed slot is built-in with the multiply coil windings, forms permanent-magnet brushless DC electric machine stator core assembly.
This patent has proposed the effective technology of following solution first-harmonic groove torque and torque magnetic resistance at technical elements, this patent adopts fractional slot winding and polyphase windings technology; Skewed stator slot, skewed-rotor or rotor magnetic pole segmentation dislocation technology; The magnetic pole migration technology; Stator iron core silicon steel sheet, crown are opened the auxiliary flute technology, rotor position sensing technology etc., and comprehensive above technology reduces cogging torque, makes power of motor improve machine operation stable operation.
Watt shape magnetic pole technology of rotor; The magnetic pole of the machine fro of rotor is that the machine fro by the S utmost point and the N utmost point is combined into, piece together the rotor assembly of making direct current machine between magnetic pole two ends and adjacent two magnetic shoes, the two ends of silicon sheet core are that fixing aluminium flake dish fixed stator iron core is arranged, be provided with perforate in the disk magnet steel, the cast aluminium connection is fixed together discoid steel disc.Cast aluminium link outer end is provided with flabellum and balance columns.Shown in the figure.
The Electromagnetic Design aspect of the present embodiment motor adopts A, B, C, three kinds of technology, the gap structure design has effectively reduced and has weakened the reluctance torque of armature supply to magnet steel, effectively prevented loss of excitation or the local demagnetization of permanent magnet under the high peak current, reliability and the life-span of having improved motor.
Because magnet steel seat is fixed on the machine shaft of outer end in the electric motor end cap, it is subjected to external interference little, makes the motor electronic commutation signal not be subjected to the interference of rotor machining precision, armature supply.Position sensing element only is subjected to the impact of ambient temperature, makes machine operation more stable, and reliability is higher.Each line of demarcation, magnetic field is clear, even after adopting the magnetic pole transducer magnet steel splicings such as multi-disc discrete magnetic pole is spliced, and precision is high, so that motor commutation work is more reliable.
Because the magnetic pole of rotor machine fro is combined into by the magnet steel of the S utmost point and the N utmost point, compare with the whole magnetic pole of employing, can reduce eddy current and stray loss, improved the efficient of motor, solve rotor magnetic pole watt shape permanent magnet because of the overheated demagnetization problem that causes, and can improve the mechanical strength of magnetic pole watt shape permanent magnet, prolong motor useful life.Retainer plate can prevent from dropping because ageing of binders causes a magnetic pole watt shape permanent magnet, makes magnetic shoe reliably fixing.The two ends of motor silicon steel drift sheet iron core are provided with fixed charge method end plate and have protected a watt shape magnetic pole shape permanent magnet, can make the rotor heat radiation better.
Claims (3)
1. the oblique magnetic pole brushless permanent magnet DC motor of high speed rotor, comprise electric machine casing, the punching of stator silicon steel, multiply coil windings and set magnet permanent body, be equipped with the permanent magnet inner room in the silicon steel punching teeth groove silicon steel punching of motor rotor core, it is characterized in that, rotor magnet inner room magnetic pole is that the oblique utmost point, rotating shaft and rotor magnet inner room magnetic pole are oblique magnetic pole, rotor magnetic pole skew.
2. the oblique magnetic pole brushless permanent magnet DC motor of high speed rotor as claimed in claim 1, it is characterized in that, rotor is fractional slot winding, the punching of rotor silicon steel laminates the field frame assembly skewed slot that cast aluminium forms, magnetic pole places magnetic pole permanent magnet inner room for watt oblique magnetic pole of shape permanent magnet, is equipped with many group magnetic pole watt shape permanent magnets in the rotor assembly skewed slot.
3. the oblique magnetic pole brushless permanent magnet DC motor of high speed rotor as claimed in claim 2 is characterized in that, rotor is provided with rotor-position sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268639 CN202737715U (en) | 2012-06-06 | 2012-06-06 | High-speed rotor skewed magnetic pole brushless permanent magnet direct-current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220268639 CN202737715U (en) | 2012-06-06 | 2012-06-06 | High-speed rotor skewed magnetic pole brushless permanent magnet direct-current motor |
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| CN202737715U true CN202737715U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220268639 Expired - Lifetime CN202737715U (en) | 2012-06-06 | 2012-06-06 | High-speed rotor skewed magnetic pole brushless permanent magnet direct-current motor |
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| CN (1) | CN202737715U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109314422A (en) * | 2016-06-24 | 2019-02-05 | 三菱电机株式会社 | The rotor and permanent-magnet rotary electric machine of permanent-magnet rotary electric machine |
| CN111373632A (en) * | 2017-11-24 | 2020-07-03 | Zf腓特烈斯哈芬股份公司 | Stabilizer actuator with permanent magnet motor |
| CN113162347A (en) * | 2021-03-19 | 2021-07-23 | 靳晨昊 | Motor for new energy vehicle and control method thereof |
-
2012
- 2012-06-06 CN CN 201220268639 patent/CN202737715U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109314422A (en) * | 2016-06-24 | 2019-02-05 | 三菱电机株式会社 | The rotor and permanent-magnet rotary electric machine of permanent-magnet rotary electric machine |
| CN109314422B (en) * | 2016-06-24 | 2020-06-09 | 三菱电机株式会社 | Rotor of permanent magnet type rotating electrical machine and permanent magnet type rotating electrical machine |
| CN111373632A (en) * | 2017-11-24 | 2020-07-03 | Zf腓特烈斯哈芬股份公司 | Stabilizer actuator with permanent magnet motor |
| CN113162347A (en) * | 2021-03-19 | 2021-07-23 | 靳晨昊 | Motor for new energy vehicle and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ANHUI DONGDAO NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHUNCHENG HOLDING GROUP CO., LTD. Effective date: 20140901 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 325000 WENZHOU, ZHEJIANG PROVINCE TO: 230002 HEFEI, ANHUI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140901 Address after: 230002 Anhui city in Hefei Province, the new station Wenzhong Road Industrial Park No. 3 B4 billion plant building Patentee after: Anhui East Amperex Technology Limited Address before: 325000 Zhejiang province Wenzhou city Ouhai District Louqiao Street Lou Qiao Cun Patentee before: Chuncheng Holding Group Co. Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200108 Address after: Room 710, 701-712, juoyue Times Square building, No. 4068, Yitian Road, Futian community, Futian District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Lvting Power Technology Co., Ltd Address before: 230002 Anhui city in Hefei Province, the new station Wenzhong Road Industrial Park No. 3 B4 billion plant building Patentee before: Anhui East Amperex Technology Limited |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |