CN104201849A - Separable transformer type double-stator brushless double-fed motor - Google Patents
Separable transformer type double-stator brushless double-fed motor Download PDFInfo
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- CN104201849A CN104201849A CN201410462381.5A CN201410462381A CN104201849A CN 104201849 A CN104201849 A CN 104201849A CN 201410462381 A CN201410462381 A CN 201410462381A CN 104201849 A CN104201849 A CN 104201849A
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Abstract
The invention discloses a separable transformer type double-stator brushless double-fed motor which comprises an outer stator, a cup-type rotor, an inner stator and a rotating shaft sequentially from outside to inside. The outer stator, the cup-type rotor and the inner stator are coaxial and independent from one another, the rotor is fixed on the rotating shaft, an outer air gap is formed between the outer stator and the cup-type rotor, and an inner air gap is formed between the rotor and the inner stator. The separable transformer type double-stator brushless double-fed motor is of a novel motor structure provided based on a brush double-fed motor operating principle through structural equivalence. A separable transformer composed of the inner layer of the rotor and the inner stator transmits rotor current and voltage of the double-fed motor to the side of the inner stator in a contactless mode, and accordingly functions of an existing brush double-fed motor are realized completely; however, an electric brush slip ring, low in reliability and needing scheduled maintenance, in the brush double-fed motor is omitted, thus the separable transformer type double-stator brushless double-fed motor has high application value in high-reliability, maintenance-free, low-cost variable-frequency speed control occasions.
Description
Technical field
The present invention relates to brushless electric machine field, be specifically related to a kind of separable transformer formula Dual-stator brushless double-fed motor.
Background technology
Traditional double generating aid is wound rotor asynchronous machine, and rotor winding, with rotor, must use electric brush slip ring that the electric current and voltage in rotation winding is drawn with conduction pattern.Thereby make double feedback electric engine have two electric ports, a mechanical port, has good frequency control performance, in megawatt level wind power generation system and high-grade drives, is widely used.But the existence of electric brush slip ring causes motor poor reliability, and maintenance cost is high.Have the brushization of going of brush double feedback electric engine is the focus that people study always.
Patent publication No. CN102163896A provides a kind of brushless dual-feed motor, and its stator and rotor core are all rushed vertically and the wire casing of circumferencial direction near the surface of air gap.In the wire casing paralleling to the axis, place power winding, the interior placement of wire casing that is parallel to circumferencial direction controlled winding.Stator power winding and rotor power winding form wound asynchronous motor subsystem, realize energy converting between mechanical; Stator control winding and rotor control winding form transformer subsystem, realize the brushless regulatory function of the additional field power supply frequency of rotor power winding and amplitude.But because stator core and rotor core are by power winding magnetic field with to control winding magnetic field multiplexing, iron core is easily saturated.Once unshakable in one's determination saturated, between power winding and control winding, will intercouple, increase and control difficulty.Secondly,, due to the existence of the direction wire casing that parallels to the axis, control winding magnetic field along the circumferential direction distributes no longer even, but relevant with the relative position between rotor and stator.In the time of rotor, transformer subsystem can produce one-period torque component, worsens the torque output of motor.Meanwhile, axially wire casing can make effective air gap length increase, and reduces the transmittability of transformer subsystem.
Summary of the invention
Goal of the invention: the problem that has electric brush slip ring in order to solve traditional double generating aid, detachable transformer in non-contact type electric energy transmission field is introduced to double feedback electric engine, propose a kind of separable transformer formula Dual-stator brushless double-fed motor, solved the deficiencies in the prior art.
Technical scheme: a kind of separable transformer formula Dual-stator brushless double-fed motor, it is characterized in that, comprise successively from outside to inside external stator, cup rotor, internal stator and rotating shaft; External stator, cup rotor and internal stator are coaxial and separate, and described rotor is fixed in rotating shaft; Between external stator and cup rotor, be provided with outer air gap, between rotor and internal stator, be provided with interior air gap;
External stator comprises external stator iron core and external stator winding from outside to inside successively;
Cup rotor comprises that rotor outer layer iron core, rotor axial support and rotor inner layer iron core from outside to inside successively; Rotor outer layer iron core comprises the rotor outer layer winding that embeds external rotor iron core; Rotor inner layer iron core comprises the rotor inner layer winding that embeds external rotor iron core;
Internal stator comprises internal stator winding and internal stator iron core from outside to inside successively;
Wherein, external stator winding and rotor outer layer winding are arranged vertically, are the extremely distributed winding of 2p; Internal stator winding and rotor inner layer winding are annular centralized winding, along the circumferential direction arrange; External stator winding and internal stator winding are respectively two feed port of motor; External stator iron core and rotor outer layer iron core are evenly slotted vertically, and internal stator iron core and rotor inner layer iron core are along the circumferential direction evenly slotted, and this groove is concentric with axle.
Concrete, described brushless dual-feed motor rotating speed determines jointly by electric frequency and the number of pole-pairs of two cover stator winding, and two cover stator winding are respectively internal stator winding and external stator winding; Realize motor speed adjusting by changing the electric frequency of a set of winding or double winding.
Concrete, the rotation speed n of separable transformer formula Dual-stator brushless double-fed motor
rfrequency f with electric current in internal stator winding
p, external stator winding and middle electric current frequency f
qmeet relational expression:
In formula, p is magnetic pole logarithm.
Concrete, described rotor axial is supported for cup-shaped mechanical support device.
Beneficial effect:
Separable transformer formula Dual-stator brushless double-fed motor of the present invention is a kind of based on having brush double feedback electric engine operation logic, the novel electric machine structure proposing by structural equivalents.Detachable transformer in non-contact type electric energy transmission field is introduced to double feedback electric engine, rotor inner layer and molecular detachable transformer decided at the higher level but not officially announced are transferred to internal stator side by the rotor current of double feedback electric engine, voltage with cordless, thereby realize the function that has brush double feedback electric engine completely, have in brush double feedback electric engine that reliability is low, the electric brush slip ring that needs periodic maintenance but cancelled, only just can realize flexibly motor speed adjusting by changing the electric frequency of stator winding.Thereby there is good using value in high reliability, non-maintaining, low cost frequency control occasion.
On traditional internal stator iron core and rotor inner layer iron core, slotting, is axial groove, silicon steel sheet punching press or line need to be cut into along the evenly lamination of fluting of circumferencial direction, then laminates into unshakable in one's determination along axial fixed length or fixed number.Meanwhile, axially wire casing can make effective air gap length increase, and reduces the transmittability of transformer subsystem.And the present invention adopts fluting along the circumferential direction, only silicon steel sheet punching press or line need be cut into the different annulus of internal diameter, then form iron core along axially laminating, technique is simple.And tangential force is zero between transformer is primary and secondary, can not produce extra torque pulsation.
Rotor axial supports between and internal layer iron core unshakable in one's determination in rotor outer layer, adopt magnetic conduction, all high materials of bad but mechanical strength of electric conductivity, as austenitic stainless steel is made, held concurrently and supported and the function in isolated magnetic field, thus power winding magnetic field and control that winding magnetic field is spatially isolated from each other, separate in function.Owing to adopting two gap structures, the width of two-layer air gap can be designed respectively, because outer air gap is used for energy converting between mechanical, (0.5-0.7mm) is with torque ripple reduction suitably more greatly simultaneously; And internal layer air gap is for non-contact type energy transmission, need as far as possible little (0.3-0.5mm) to increase the coupling inductance between primary and secondary, improve energy transmission efficiency.
Brief description of the drawings
Fig. 1 is schematic cross-section of the present invention.
Fig. 2 is rotor structure schematic diagram of the present invention.
Fig. 3 is internal stator structural representation of the present invention.
In figure, 1 is external stator iron core, and 2 is external stator winding, and 3 is rotor outer layer iron core, 4 is rotor outer layer winding, 5 for rotor axial supports, and 6 is rotor inner layer iron core, and 7 is rotor inner layer winding, 8 is rotor radial air duct, 9 is internal stator iron core, and 10 is internal stator winding, and 11 is internal stator radial ducts.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done further and explained.
As shown in Figure 1, a kind of separable transformer formula Dual-stator brushless double-fed motor, comprises external stator, cup rotor, internal stator and rotating shaft from outside to inside successively; External stator, cup rotor and internal stator are coaxial and separate, and described rotor is fixed in rotating shaft, as unique mechanical port of motor; Between external stator and cup rotor, be provided with outer air gap, between rotor and internal stator, be provided with interior air gap;
External stator comprises external stator unshakable in one's determination 1 and external stator winding 2 from outside to inside successively, and external stator iron core is formed by silicon steel plate stacking;
As shown in Figure 2, cup rotor comprises rotor outer layer iron core 3, rotor axial support 5 and rotor inner layer iron core 6 from outside to inside successively; Rotor outer layer iron core 3 comprises the rotor outer layer winding 4 that embeds external rotor iron core; Rotor inner layer iron core 6 comprises the rotor inner layer winding 7 that embeds external rotor iron core; Rotor outer layer winding 4 is connected with rotor inner layer winding 7 correspondences.Wherein rotor axial support 5 is cup-shaped mechanical support device.The inside and outside layer of rotor is unshakable in one's determination to be formed by silicon steel plate stacking.Rotor axial supports and adopts conduction, magnetic property is all bad, but the high material of mechanical strength makes, as austenitic stainless steel.
As shown in Figure 3, internal stator comprises internal stator iron core 9, embeds internal stator winding 10 in internal stator iron core 9, and internal stator iron core is formed by silicon steel plate stacking;
As shown in Figure 2, have twice to run through the rotor radial air duct 8 of rotor inner layer iron core 6 on rotor inner layer iron core 6, this rotor radial air duct 8 is with axially vertical.
As shown in Figure 3, have twice to run through the internal stator radial ducts 11 of internal stator iron core 9 on internal stator iron core 9, this internal stator radial ducts 11 is with axially vertical.
Wherein, external stator winding 2 and rotor outer layer winding 4 are arranged vertically, are the extremely distributed winding of 2p; Internal stator winding 10 and rotor inner layer winding 7 are annular centralized winding, along the circumferential direction arrange; External stator winding 2 and internal stator winding 10 are respectively two feed port of motor; External stator unshakable in one's determination 1 and rotor outer layer iron core 3 are evenly slotted vertically, and internal stator iron core 9 and rotor inner layer iron core 6 are along the circumferential direction evenly slotted, and this groove is concentric with axle.
This brushless dual-feed motor rotating speed determines jointly by electric frequency and the number of pole-pairs of two cover stator winding, and two cover stator winding are respectively internal stator winding 10 and external stator winding 2; Realize motor speed adjusting by changing the electric frequency of a set of winding or double winding.The rotation speed n of motor
rfrequency f with electric current in internal stator winding 10
p, external stator winding 2 and middle electric current frequency f
qmeet relational expression:
In formula, p is magnetic pole logarithm.
The rotating speed formula of this rotating speed formula and double feedback electric engine is similar, and difference is, detachable transformer can only transmit alternating voltage, electric current, and can not be operated in synchronous speed
when electric machine rotation,
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. a separable transformer formula Dual-stator brushless double-fed motor, is characterized in that, comprises successively from outside to inside external stator, cup rotor, internal stator and rotating shaft; External stator, cup rotor and internal stator are coaxial and separate, and described rotor is fixed in rotating shaft; Between external stator and cup rotor, be provided with outer air gap, between rotor and internal stator, be provided with interior air gap;
External stator comprises external stator iron core and external stator winding from outside to inside successively;
Cup rotor comprises that rotor outer layer iron core, rotor axial support and rotor inner layer iron core from outside to inside successively; Rotor outer layer iron core comprises the rotor outer layer winding that embeds external rotor iron core; Rotor inner layer iron core comprises the rotor inner layer winding that embeds external rotor iron core;
Internal stator comprises internal stator winding and internal stator iron core from outside to inside successively;
Wherein, external stator winding and rotor outer layer winding are arranged vertically, are the extremely distributed winding of 2p; Internal stator winding and rotor inner layer winding are annular centralized winding, along the circumferential direction arrange; External stator winding and internal stator winding are respectively two feed port of motor; External stator iron core and rotor outer layer iron core are evenly slotted vertically, and internal stator iron core and rotor inner layer iron core are along the circumferential direction evenly slotted, and this groove is concentric with axle.
2. a kind of separable transformer formula Dual-stator brushless double-fed motor as claimed in claim 1, it is characterized in that, described brushless dual-feed motor rotating speed determines jointly by electric frequency and the number of pole-pairs of two cover stator winding, and two cover stator winding are respectively internal stator winding and external stator winding; Realize motor speed adjusting by changing the electric frequency of a set of winding or double winding.
3. a kind of separable transformer formula Dual-stator brushless double-fed motor as claimed in claim 2, is characterized in that, the frequency f of electric current in the rotation speed n r of described separable transformer formula Dual-stator brushless double-fed motor and internal stator winding
p, external stator winding and middle electric current frequency f
qmeet relational expression:
In formula, p is magnetic pole logarithm.
4. a kind of separable transformer formula Dual-stator brushless double-fed motor as claimed in claim 1, is characterized in that, described rotor axial is supported for cup-shaped mechanical support device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462381.5A CN104201849A (en) | 2014-09-11 | 2014-09-11 | Separable transformer type double-stator brushless double-fed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462381.5A CN104201849A (en) | 2014-09-11 | 2014-09-11 | Separable transformer type double-stator brushless double-fed motor |
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|---|---|
| CN104201849A true CN104201849A (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410462381.5A Pending CN104201849A (en) | 2014-09-11 | 2014-09-11 | Separable transformer type double-stator brushless double-fed motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743308A (en) * | 2016-04-18 | 2016-07-06 | 合肥工业大学 | High-power-density permanent magnet dual-stator brushless doubly-fed motor |
| CN105914978A (en) * | 2016-04-18 | 2016-08-31 | 合肥工业大学 | Double-stator brushless double-feed motor |
| CN110311486A (en) * | 2019-07-01 | 2019-10-08 | 东南大学 | A kind of brushless dual-feed motor double-cage rotor and conducting bar connection method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0926806A2 (en) * | 1997-12-12 | 1999-06-30 | Flavio Novelli | Electric machine with rotating field and double air gap |
| CN101179221A (en) * | 2007-09-20 | 2008-05-14 | 华中科技大学 | Brushless dual-mechanical port motor |
| CN101714846A (en) * | 2009-11-20 | 2010-05-26 | 徐州中矿大传动与自动化有限公司 | Brushless synchronous dynamo |
| CN101917101A (en) * | 2010-08-06 | 2010-12-15 | 国电联合动力技术有限公司 | Double-stator direct-drive permanent magnet wind powered generator |
| CN102163896A (en) * | 2011-03-15 | 2011-08-24 | 中国矿业大学 | Brushless double-fed motor |
| JP2011244643A (en) * | 2010-05-20 | 2011-12-01 | Denso Corp | Double stator motor |
| CN202435219U (en) * | 2012-01-19 | 2012-09-12 | 东南大学 | Brushless double-fed motor |
-
2014
- 2014-09-11 CN CN201410462381.5A patent/CN104201849A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0926806A2 (en) * | 1997-12-12 | 1999-06-30 | Flavio Novelli | Electric machine with rotating field and double air gap |
| CN101179221A (en) * | 2007-09-20 | 2008-05-14 | 华中科技大学 | Brushless dual-mechanical port motor |
| CN101714846A (en) * | 2009-11-20 | 2010-05-26 | 徐州中矿大传动与自动化有限公司 | Brushless synchronous dynamo |
| JP2011244643A (en) * | 2010-05-20 | 2011-12-01 | Denso Corp | Double stator motor |
| CN101917101A (en) * | 2010-08-06 | 2010-12-15 | 国电联合动力技术有限公司 | Double-stator direct-drive permanent magnet wind powered generator |
| CN102163896A (en) * | 2011-03-15 | 2011-08-24 | 中国矿业大学 | Brushless double-fed motor |
| CN202435219U (en) * | 2012-01-19 | 2012-09-12 | 东南大学 | Brushless double-fed motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105743308A (en) * | 2016-04-18 | 2016-07-06 | 合肥工业大学 | High-power-density permanent magnet dual-stator brushless doubly-fed motor |
| CN105914978A (en) * | 2016-04-18 | 2016-08-31 | 合肥工业大学 | Double-stator brushless double-feed motor |
| CN105743308B (en) * | 2016-04-18 | 2018-06-05 | 合肥工业大学 | A kind of high-power density permanent magnetic Dual-stator brushless double-fed motor |
| CN110311486A (en) * | 2019-07-01 | 2019-10-08 | 东南大学 | A kind of brushless dual-feed motor double-cage rotor and conducting bar connection method |
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Application publication date: 20141210 |