CN104810945A - Synchronous reluctance motor rotor applied to hybrid power system - Google Patents
Synchronous reluctance motor rotor applied to hybrid power system Download PDFInfo
- Publication number
- CN104810945A CN104810945A CN201510200954.1A CN201510200954A CN104810945A CN 104810945 A CN104810945 A CN 104810945A CN 201510200954 A CN201510200954 A CN 201510200954A CN 104810945 A CN104810945 A CN 104810945A
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- Prior art keywords
- rotor
- power system
- magnetic resistance
- hybrid power
- motor rotor
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a synchronous reluctance motor rotor applied to a hybrid power system. The synchronous reluctance motor rotor applied to the hybrid power system comprises a rotor core and magnetic steel. The rotor core is formed by rotor punching sheets in an overlying mode. Each rotor punching sheet comprises a plurality of symmetrical magnetic poles, and the polarities of every two adjacent magnetic poles are opposite. Each magnetic pole comprises a plurality of layers of grids, wherein the magnetic steel is placed in the grids. Grooves are formed in the excircle of the rotor in the straight axes in the direction facing the circle center of the rotor.
Description
Technical field
The present invention relates to a kind of synchronous magnetic resistance motor structure, be specifically related to a kind of synchronous magnetic resistance motor rotor structure being applied to hybrid power system.
Background technology
Existing automobile drive motor is generally AC induction motor and permagnetic synchronous motor, AC induction motor structure is simple, reliable, but power density is lower, Constant-power speed range is narrower, and have copper loss due to asynchronous machine rotor, rotor heating amount conducts to bearing place, greatly will reduce the life-span of bearing, thus cause the whole motor lost of life; Although rotor heating amount is lower while that permagnetic synchronous motor efficiency being higher, power density is higher, Constant-power speed range is wider, but because it is based on permanent-magnet torque, its back electromotive force is too high when high speed, out of controlly can damage system, is unfavorable for the control that vehicle high-speed runs.
In recent years, synchronous magnetic resistance motor is used in electric automobiles gradually, synchronous magnetic resistance motor has the advantages such as power density is high, speed-regulating range width, efficiency are high, volume is little, but because needs provide permanent magnet to improve motor performance, often adopt rare-earth permanent magnet, and rare-earth permanent magnet is non-renewable, expensive.
In order to save rare metal resources, alleviate environmental pressure, more in order to improve motor performance, efficiency, the present invention proposes a kind of new synchronous electric motor rotor, and the processing of this structure is simple, and lower mechanical strength is high at a high speed, back electromotive force is low, and salient pole ratio is large, torque ripple is little.
Summary of the invention
The present invention is for overcoming deficiency of the prior art, a kind of synchronous magnetic resistance motor rotor being applied to hybrid power system is proposed, comprise rotor core and magnet steel, described rotor core is overrided to form by rotor punching, described rotor punching comprises the magnetic pole of several symmetries, polarity between described adjacent pole is contrary, described magnetic pole comprises multilayer grid, described magnet steel is placed in described grid, described rotor outer circle arranges groove at d-axis place towards direction, the rotor center of circle, solve the inherent shortcoming of existing permagnetic synchronous motor and AC induction motor, and compare existing synchronous magnetic resistance motor, processing technology is simple, salient pole is than large, torque ripple is little.
For achieving the above object, technical scheme of the present invention is:
A kind of synchronous magnetic resistance motor rotor being applied to hybrid power system, comprise rotor core and magnet steel, described rotor core is overrided to form by rotor punching, described rotor punching comprises the magnetic pole of several symmetries, polarity between described adjacent pole is contrary, described magnetic pole comprises multilayer grid, and described magnet steel is placed in described grid, and described rotor outer circle arranges groove at d-axis place towards direction, the rotor center of circle.
Described grid at least comprises two-layer.
Described every layer of grid is divided into three parts, is bathtub construction, and the angle that the bottom of described bathtub construction and both sides are formed is greater than 90 degree.
In described every layer of grid, part places magnet steel, and remainder places epoxy resin or vacant.
Described magnet steel is Nd-Fe-B magnet steel.
The scope of design of described recess width b is T/8≤b≤T/4, and wherein T is rotor polar distance.
The scope of design of described depth of groove h is T/30≤b≤T/15.
A kind of hybrid electric drive system, comprise engine, gearbox, motor, described engine, gearbox, motor are linked in sequence, and described motor uses above-mentioned any one to be applied to the synchronous magnetic resistance motor rotor of hybrid power system.
Compared with existing synchronous magnetic resistance motor, the present invention has remarkable advantage and beneficial effect, is embodied as:
1, use synchronous magnetic resistance motor rotor of the present invention, adopt part grid to place the design of magnet steel, reduce the use amount of magnet steel, save cost;
2, use synchronous magnetic resistance motor rotor of the present invention, rotor outer circle is arranged at d-axis place towards the groove in the rotor center of circle, increases the magnetic resistance of d-axis, increases motor salient pole ratio.
Accompanying drawing explanation
Fig. 1 is the structural representation of synchronous magnetic resistance motor rotor first embodiment of the present invention;
Fig. 2 is the structural representation of synchronous magnetic resistance motor rotor second embodiment of the present invention;
Fig. 3 is the structural representation of synchronous magnetic resistance motor rotor of the present invention 3rd embodiment;
Fig. 4 is the structural representation of synchronous magnetic resistance motor rotor of the present invention 4th embodiment;
Fig. 5 be synchronous magnetic resistance motor rotor structure further groove width of the present invention with salient pole than and the relation schematic diagram of torque;
Fig. 6 be the synchronous magnetic resistance motor rotor structure further groove degree of depth of the present invention with salient pole than and the relation schematic diagram of torque.
Embodiment
Specific embodiment of the invention method is as follows:
Synchronous magnetic resistance motor rotor provided by the invention has multiple permanent magnet trough group, often organizes permanent magnet trough and comprises multilayer grid.So-called " grid " refers to the channel-shaped arranged on rotor core or the structure running through rotor core vertically herein, is similar to the magnetic pole groove of permagnetic synchronous motor, but can fills in this grid or not fill permanent magnetic material; So-called " salient pole ratio " refers to the ratio of motor quadrature axis inductance and d-axis inductance herein.Permanent magnet magnetism in rotor of the present invention same permanent magnet trough group is identical, and the permanent magnet magnetism between adjacent permanent magnet groove group is contrary, namely adopts the form being along the circumferential direction arranged in N pole and S pole and replacing.
Fig. 1 is the structural representation of synchronous magnetic resistance motor rotor first embodiment of the present invention, described rotor comprises rotor core 1, magnet steel 3, rotor core 1 is overrided to form by rotor punching, rotor punching is made up of six symmetrical magnetic poles, described magnetic pole is made up of at least two-layer grid 2, the present embodiment selects two-layer grid, described grid 2 be made up of three sections of linear grids and be bathtub construction and basin shape opening towards rotor outer circle, the angle formed between the bottom stage of described bathtub construction and both sides section is greater than 90 degree, space is had and gap arranges connecting bridge between the bottom stage of described bathtub construction and both sides section, it is inner that described magnet steel 3 is placed in described grid 2, described rotor outer circle arranges groove 4 at d-axis place towards direction, the rotor center of circle, described groove 4 can be smooth arc shape structure.
The present invention adopt Nd-Fe-B magnet steel and non-magnetic non-conductive material with the use of, Nd-Fe-B magnet steel is placed bottom described two-layer grid 2 bathtub construction, and other portion is vacant or place the non-magnetic non-conducting materials such as epoxy resin, greatly reduce the use amount of Nd-Fe-B magnet steel, save material, weight reduction, due to whole grid 2, some is filled with magnet steel 3 simultaneously, while high, the speed-regulating range width of guarantee electric efficiency, also can ensure that the back electromotive force under it is at a high speed little, can not supply voltage be exceeded, guarantee the normal operation of motor.
Described groove 4 also can be made up of the angled line segment of multistage and fillet, be illustrated in figure 2 the second embodiment of synchronous magnetic resistance motor rotor of the present invention, described groove 4 is designed to multistage and forms, optimum is designed to three sections of bathtub constructions, and this bathtub construction is corresponding with the bathtub construction of described grid 2 arranges, can ensure that the magnetic path width between described groove 4 with described grid 2 is consistent, effectively improve magnetic flux efficiency.
Described magnet steel 3 is arranged as symmetrical structure, ensure useful life and the electric efficiency of magnet steel 3, the position of thus filling magnet steel 3 in described grid 2 also can design attitude as shown in Figure 3, Figure 4, namely described grid 2 fills described magnet steel 3 near cylindrical one deck both sides section and near the bottom stage of center of circle one deck, remainder is vacant or place the non-magnetic non-conducting materials such as epoxy resin, or described grid 2 fills described magnet steel 3 near cylindrical one deck bottom stage and near the both sides section of center of circle one deck, remainder is vacant or place the non-magnetic non-conducting materials such as epoxy resin.
The position of described groove 4 is that rotor outer circle is at d-axis place and just to magnetic pole, described groove 4 is set to level and smooth symmetrical structure, ensure that described groove 4 and the described grid 2 magnetic circuit width everywhere between cylindrical one deck is substantially identical, there will not be somewhere magnetic path width too wide or too narrow and affect whole magnetic circuit, arranging of described groove 4 can increase rotor and the air gap of motor stator at d-axis place, namely the magnetic resistance at d-axis place is added, then d-axis place inductance is reduced, add the salient pole ratio of motor, improve Driving Torque and the efficiency of motor.
If the width b of described groove 4 is too large, then described groove 4 can be very narrow near the magnetic circuit between the both sides and described grid 2 at cylindrical place, will soon be saturated, magnetic flux reduces, namely quadrature-axis reluctance is added, reduce the inductance of quadrature axis, then the salient pole ratio of motor is reduced, motor output torque, if and the width b of described groove 4 is too little, the air gap of d-axis then can be caused to reduce, magnetic resistance reduces, magnetic flux increases, namely direct axis reluctance is reduced, add the inductance of d-axis, then the salient pole ratio of motor is reduced, motor output torque, therefore the width b of described groove 4 must choose a suitable scope, by design and simulation draw the width b of described groove 4 and the ratio of rotor polar distance T for motor salient pole than and the situation that affects of Driving Torque, " rotor polar distance " described herein T=π * D1/ (2p), wherein D1 is diameter of stator bore, p is number of pole-pairs.As shown in Figure 5, can be shown that by data in figure the scope of the width b of described groove 4 is T/8≤b≤T/4, optimum chooses T/6 ~ T/5 for the width b motor salient pole ratio corresponding to the ratio of rotor polar distance T of described groove 4 and the concrete test data of Driving Torque.
If the degree of depth h of described groove 4 is too large, then described groove 4 can be very narrow near the magnetic circuit between the middle part of circle centre position and described grid 2, cause quadrature axis magnetic circuit will soon be saturated, magnetic flux reduces, namely quadrature-axis reluctance is added, reduce the inductance of quadrature axis, then the salient pole ratio of motor is reduced, motor output torque, if and the degree of depth h of described groove 4 is too little, the air gap of d-axis then can be caused to reduce, magnetic resistance reduces, d-axis magnetic flux increases, namely direct axis reluctance is reduced, add the inductance of d-axis, then the salient pole ratio of motor is reduced, motor output torque, therefore the degree of depth h of described groove 4 must choose a suitable scope, by design and simulation draw the described degree of depth h of groove 4 and the ratio of rotor polar distance T for motor salient pole than and Driving Torque affect situation.As shown in Figure 6, can be shown that by data in figure the scope of the degree of depth h of described groove 4 is T/30≤b≤T/15, optimum chooses T/26 ~ T/24 for the degree of depth h motor salient pole ratio corresponding to the ratio of rotor polar distance T of described groove 4 and the concrete test data of Driving Torque.
The magnetic structure that synchronous magnetic resistance motor rotor of the present invention adopts, its reluctance torque accounts for the ratio of total torque about 70%, permanent-magnet torque accounts for the ratio of total torque about 30%, its efficiency is higher by about 4% than the asynchronous machine efficiency of same grade, speed adjustable range can from rated speed to 2 times of rated speeds, and its peak power can remain unchanged.
Synchronous magnetic resistance motor rotor of the present invention improves by the magnetic resistance difference of raising d-axis, quadrature axis the ability that unitary current produces electromagnetic torque, larger reluctance torque can be produced under identical electric current, thus make the electromagnetic torque of synthesis larger, therefore the synchronous magnetic resistance motor operating current of employing rotor of the present invention can be less, this also improves the demagnetization current multiple of synchronous magnetic resistance motor indirectly, more effectively ensure that the reliability of synchronous magnetic resistance motor in anti-demagnetization.In addition, because the electromagnetic torque adopting the synchronous magnetic resistance motor unitary current of rotor of the present invention to produce is larger, it is higher that synchronous magnetic resistance motor power density can be done, increase volume or the materials'use amount of synchronous magnetic resistance motor without the need to the demagnetization current in order to improve motor, synchronous magnetic resistance motor cost of the present invention is lower.
For being one exemplary embodiment of the present invention; should be understood to be claims of the present invention protection range in a certain demonstrative example wherein; there is directiveness effect those skilled in the art being realized to corresponding technical scheme, but not limitation of the invention.
Claims (8)
1. one kind is applied to the synchronous magnetic resistance motor rotor of hybrid power system, comprise rotor core and magnet steel, described rotor core is overrided to form by rotor punching, described rotor punching comprises the magnetic pole of several symmetries, polarity between described adjacent pole is contrary, described magnetic pole comprises multilayer grid, and described magnet steel is placed in described grid, and described rotor outer circle arranges groove at d-axis place towards direction, the rotor center of circle.
2. the synchronous magnetic resistance motor rotor being applied to hybrid power system according to claim 1, is characterized in that: described grid at least comprises two-layer.
3. the synchronous magnetic resistance motor rotor being applied to hybrid power system according to claim 2, is characterized in that: described every layer of grid is divided into three parts, is bathtub construction, and the angle that the bottom of described bathtub construction and both sides are formed is greater than 90 degree.
4. the synchronous magnetic resistance motor rotor being applied to hybrid power system according to claim 3, is characterized in that: in described every layer of grid, part places magnet steel, and remainder places epoxy resin or vacant.
5. the synchronous magnetic resistance motor rotor being applied to hybrid power system according to claim 4, is characterized in that: described magnet steel is Nd-Fe-B magnet steel.
6. the synchronous magnetic resistance motor rotor being applied to hybrid power system according to claim 1, is characterized in that: the scope of design of described recess width b is T/8≤b≤T/4, and wherein T is rotor polar distance.
7. the synchronous magnetic resistance motor rotor being applied to hybrid power system according to claim 1, is characterized in that: the scope of design of described depth of groove h is T/30≤b≤T/15.
8. a hybrid electric drive system, comprise engine, gearbox, motor, described engine, gearbox, motor are linked in sequence, and it is characterized in that: described motor use described in the claims 1-7 any one be applied to the synchronous magnetic resistance motor rotor of hybrid power system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510200954.1A CN104810945A (en) | 2015-04-24 | 2015-04-24 | Synchronous reluctance motor rotor applied to hybrid power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510200954.1A CN104810945A (en) | 2015-04-24 | 2015-04-24 | Synchronous reluctance motor rotor applied to hybrid power system |
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| Publication Number | Publication Date |
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| CN104810945A true CN104810945A (en) | 2015-07-29 |
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| CN201510200954.1A Pending CN104810945A (en) | 2015-04-24 | 2015-04-24 | Synchronous reluctance motor rotor applied to hybrid power system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048670A (en) * | 2015-08-14 | 2015-11-11 | 柳州佳力电机股份有限公司 | High-power permanent magnet synchronous motor rotor |
| CN106411001A (en) * | 2015-07-31 | 2017-02-15 | 启东黑马汽车科技有限公司 | Water-cooled permanent magnetic resistance synchronous motor rotor structure for pure electric vehicles |
| CN107394922A (en) * | 2017-08-24 | 2017-11-24 | 智车优行科技（上海）有限公司 | Built-in permanent magnet motor rotor and magneto |
| CN108429375A (en) * | 2018-05-08 | 2018-08-21 | 珠海格力电器股份有限公司 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
| CN110247526A (en) * | 2019-04-25 | 2019-09-17 | 上海电机***节能工程技术研究中心有限公司 | A kind of low harmony wave synchronous magnetic resistance motor rotor Core Design method |
| WO2019174322A1 (en) * | 2018-03-16 | 2019-09-19 | 珠海格力电器股份有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor, and electric vehicle |
| CN112564343A (en) * | 2019-07-22 | 2021-03-26 | 威刚科技股份有限公司 | Rotating electric machine and rotor assembly thereof |
| CN113224878A (en) * | 2021-04-30 | 2021-08-06 | 华为技术有限公司 | Driving motor and electric automobile |
-
2015
- 2015-04-24 CN CN201510200954.1A patent/CN104810945A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411001A (en) * | 2015-07-31 | 2017-02-15 | 启东黑马汽车科技有限公司 | Water-cooled permanent magnetic resistance synchronous motor rotor structure for pure electric vehicles |
| CN105048670A (en) * | 2015-08-14 | 2015-11-11 | 柳州佳力电机股份有限公司 | High-power permanent magnet synchronous motor rotor |
| CN107394922A (en) * | 2017-08-24 | 2017-11-24 | 智车优行科技（上海）有限公司 | Built-in permanent magnet motor rotor and magneto |
| CN107394922B (en) * | 2017-08-24 | 2023-11-14 | 智车优行科技（上海）有限公司 | Built-in permanent magnet motor rotor and permanent magnet motor |
| WO2019174322A1 (en) * | 2018-03-16 | 2019-09-19 | 珠海格力电器股份有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor, and electric vehicle |
| CN108429375A (en) * | 2018-05-08 | 2018-08-21 | 珠海格力电器股份有限公司 | Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric vehicle |
| US11456634B2 (en) | 2018-05-08 | 2022-09-27 | Gree Electric Appliances, Inc. Of Zhuhai | Rotor structure, permanent magnet assisted synchronous reluctance motor and electric car |
| CN110247526A (en) * | 2019-04-25 | 2019-09-17 | 上海电机***节能工程技术研究中心有限公司 | A kind of low harmony wave synchronous magnetic resistance motor rotor Core Design method |
| CN110247526B (en) * | 2019-04-25 | 2020-12-22 | 上海电机***节能工程技术研究中心有限公司 | Design method for rotor core of low-harmonic synchronous reluctance motor |
| CN112564343A (en) * | 2019-07-22 | 2021-03-26 | 威刚科技股份有限公司 | Rotating electric machine and rotor assembly thereof |
| CN113224878A (en) * | 2021-04-30 | 2021-08-06 | 华为技术有限公司 | Driving motor and electric automobile |
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Application publication date: 20150729 |
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