CN1588758A - Three phase AC motor with less wave form distortion ratio and high efficiency - Google Patents
Three phase AC motor with less wave form distortion ratio and high efficiency Download PDFInfo
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- CN1588758A CN1588758A CN 200410064507 CN200410064507A CN1588758A CN 1588758 A CN1588758 A CN 1588758A CN 200410064507 CN200410064507 CN 200410064507 CN 200410064507 A CN200410064507 A CN 200410064507A CN 1588758 A CN1588758 A CN 1588758A
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Abstract
This invention relates to a continuous rotating type ac electric motor, particularly three phase, low wave form distortion, high efficiency ac electric motor being composed of a rotor and a stator. The stator comprises: a seat, a stator core and stator winding each of the three phase stator winding occupies one layer of stator core channel. On the cross-section of the stator core, the corresponding end points of three-layer winding are of 120 deg. intervals. This invention breaks-through prior art mode of single layer or double layers of stator winding of three-phase motor, so it can eliminating distortion wave form of three phase electric motor, the distortion rate is less than 2%. The efficiency of electric generation is greater than 95%, while the efficiency of electric motor is greater than 90%.
Description
Technical field
The present invention relates to a kind of alternating current machine of continuous rotation, the three phase alternating current motor that specifically a kind of irregularity of wave form is little, efficient is high.
Background technology
For all kinds of three phase alternating current motors that comprise generator and motor, its structure all is made up of stator and rotor, and stator is to be fixed with stator core on support, is laid with the threephase stator winding in stator core.Conventional stator winding structure has concentric type, staggered form and chained scheduling, and special stator winding has mark winding and positive chorded winding etc.Conventional stator winding because its armature field can not be sinusoidal state, thereby causes voltage-form distortion rate height (reaching more than 30%).Because the harmonic content of this winding is big, so strengthened the vibration and the internal consumption of motor, has reduced efficiency of motor, electric efficiency is generally less than 80%.And special stator winding, though high order harmonic component is had certain inhibitory action because structure is special, the performance of electrical quantity is increased, but its technique for coiling complexity, the production cost height is simultaneously because its average copper factor is more a lot of than the reduction of conventional winding, therefore the power of its unit volume is low, cause motor volume big, the weight height, thereby be used less.
Summary of the invention
Purpose of the present invention just provides the three phase alternating current motor that a kind of irregularity of wave form is little, efficient is high, and the production technology of motor is simplified, and manufacturing cost reduces, and it is good that motor performance keeps.
The object of the present invention is achieved like this: three phase alternating current motor is made up of stator and rotor, stator is a fixed stator iron core on support, in the wire casing of stator core, be laid with the threephase stator winding, each phase winding of threephase stator winding occupies the one deck in the stator core wire casing, on the cross section of stator core, at interval 120 ° successively of the corresponding end points of three layers of winding.Promptly the head end of the head end of first phase winding and second phase winding is 120 ° at interval, 120 ° at interval of the head ends of the head end of second phase winding and third phase winding, 120 ° at interval of the head ends of the head end of third phase winding and first phase winding.Similarly, each tail end of three layers of winding also is at interval 120 ° successively.I.e. three layers of winding distribution setting on stator core are followed 120 ° " phase place rules " of three-phase motor stator winding.
The present invention has broken through the individual layer or the double-deck distribution pattern of stator winding in traditional three phase electric machine, three layers of winding in the stator core wire casing, laying, each layer is a phase winding, and is relatively independent between phase and phase, and follow the phase place rule, constituted the threephase stator winding of novel structure uniqueness thus.Because each phase winding in the threephase stator winding has all occupied the whole space of stator core, thus with the one-period of rotor mating reaction in, its actual induction effect must improve, power of motor will correspondingly improve.And three layers of stator winding are because the locus mutual superposition, can strengthen additionally to voltage fundamental, then can suppress to slacken to high order harmonic component, thereby make voltage-form distortion rate that obvious reduction be arranged.And the inhibition of harmonic wave then can reduce the in-fighting of motor, has promoted the raising of electric efficiency conversely again.
Threephase alternator or the three-phase alternating-current motor made by this stator winding pattern are observed by repetition test and oscilloscope, truly have the good restraining effect for the voltage-form distortion rate of three phase electric machine, then are significantly improved for electric efficiency.Its theoretic reason awaits in depth to study, but its excellent action effect is confessedly, also is the place of key of the present invention.
Every phase winding structure in the threephase stator winding among the present invention, it can be the stator winding form in the existing monophase machine, better implementation is to adopt the stator winding form of my design in " single-phase RE permanent magnetic generator " patent (patent No. ZL0224180.5), and promptly the every phase winding in the stator winding is auxiliary winding of serial connection in the middle of every utmost point main winding.Adopt the single-phase generator of this stator winding form,, can have the good restraining effect in the main winding of the every utmost point of stator winding the high order harmonic component in the output voltage waveforms by auxiliary winding is set separately.Thereby the stator winding form of this monophase machine is diverted to this, and make threephase alternator or three-phase alternating-current motor, then have the good restraining high order harmonic component equally, reduce irregularity of wave form and reduce the booster action of voltage regulation.
Every phase stator winding adopts the made threephase alternator of main and auxiliary winding serial connection form, when the threephase stator winding is the star connecting mode, phase voltage and line voltage-form distortion rate are all less than 2%, and the harmonic content in the voltage waveform is almost equal to zero, electric efficiency reaches more than 95%, and has kept the function admirable of electrical quantity.Effect when particularly, the effect during bringing onto load is than zero load is also good.The three-phase alternating-current motor that adopts this stator winding structure to make, the loss that causes because of harmonic wave reduces, and electric efficiency reaches more than 90%, has also reduced the motor oscillating that is caused because of the harmonic wave effect simultaneously, and increased the useful life of motor.
Motor stator winding among the present invention is successively to lay respectively, does not intersect, and do not disturb mutually, thereby production technology is simplified production efficiency raising, the corresponding reduction of motor manufacturing cost.In addition, because the wire turn of three layers of winding is all arranged in each stator core wire casing, so that copper factor has reached is the highest, the power of motor unit volume can reach maximum, and compares with power motor, and its volume, weight and cost all can reduce more than 20%.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation that adopts the single-phase winding of main and auxiliary winding serial connection in the stator winding.
Embodiment
As shown in Figure 1, on support 4, be fixed with stator core 1, in the wire casing of stator core 1, be laid with threephase stator winding 2.Stator core 1, three phase windings 2 and support 4 are formed stator.In stator middle part cross-under rotor 3 is arranged, form three phase alternating current motor.In the wire casing of stator core 1, be laid with three layers of winding, constitute the threephase stator winding.Each phase winding occupies the one deck in the stator core wire casing.At interval 120 ° successively of the head ends of three phase windings (or tail end), and the mode of connection is connected into star or triangle routinely, forms threephase alternator or three-phase alternating-current motor.Rotor can be forms such as rare-earth permanent magnet rotor or cage rotor.
The version of each phase winding in the threephase stator winding 2 is identical.Every phase winding form among Fig. 2 is auxiliary winding 6 of serial connection in the middle of the main winding 5 of each utmost point.Various conventional structures such as every phase winding can polarity, four utmost points, the auxiliary winding 6 in every phase winding is wound in two ceases to be busy grooves in centre of every utmost point main winding 5.The terminals of each main and auxiliary winding are connected in series successively by the mode of " main-auxilliary-auxilliary-main ", thereby form the stator winding of a certain phase.The number of turn of auxiliary winding 6 should be no more than the number of turn in the main winding list groove.Harmonic wave to three phase alternating current motor suppresses thus, irregularity of wave form reduces and the minimizing of voltage regulation, and better auxiliary function is all arranged.
Claims (5)
1, the three phase alternating current motor that a kind of irregularity of wave form is little, efficient is high, form by stator and rotor, stator is to go up fixed stator iron core (1) at support (4), in the wire casing of stator core, be laid with threephase stator winding (2), each phase winding that it is characterized in that the threephase stator winding occupies the one deck in stator core (1) wire casing, on the cross section of stator core, at interval 120 ° successively of the corresponding end points of three layers of winding.
2, three phase alternating current motor according to claim 1 is characterized in that every phase winding in the stator winding is the stator winding form in the monophase machine.
3, three phase alternating current motor according to claim 1 is characterized in that the every phase winding in the stator winding is a serial connection auxiliary winding (6) in the middle of every utmost point main winding (5).
4, three phase alternating current motor according to claim 3 is characterized in that auxiliary winding (6) is wound in two ceases to be busy grooves in centre of every utmost point main winding (5).
5, three phase alternating current motor according to claim 4, the number of turn that it is characterized in that auxiliary winding (6) is no more than the number of turn in the main winding list groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410064507 CN1588758A (en) | 2004-10-21 | 2004-10-21 | Three phase AC motor with less wave form distortion ratio and high efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410064507 CN1588758A (en) | 2004-10-21 | 2004-10-21 | Three phase AC motor with less wave form distortion ratio and high efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1588758A true CN1588758A (en) | 2005-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410064507 Pending CN1588758A (en) | 2004-10-21 | 2004-10-21 | Three phase AC motor with less wave form distortion ratio and high efficiency |
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| CN (1) | CN1588758A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795909A (en) * | 2015-03-26 | 2015-07-22 | 同济大学 | High-speed electric machine electromagnetism structure for air compressor |
| CN105450099A (en) * | 2015-12-28 | 2016-03-30 | 浙江兆丰机电股份有限公司 | Electromagnetic damping device for wheel hub motor of electric automobile |
-
2004
- 2004-10-21 CN CN 200410064507 patent/CN1588758A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104795909A (en) * | 2015-03-26 | 2015-07-22 | 同济大学 | High-speed electric machine electromagnetism structure for air compressor |
| CN104795909B (en) * | 2015-03-26 | 2017-08-25 | 同济大学 | A kind of high-speed electric expreess locomotive electromagnetic structure used for air compressor |
| CN105450099A (en) * | 2015-12-28 | 2016-03-30 | 浙江兆丰机电股份有限公司 | Electromagnetic damping device for wheel hub motor of electric automobile |
| CN105450099B (en) * | 2015-12-28 | 2017-11-24 | 浙江兆丰机电股份有限公司 | A kind of wheel hub motor electromagnetism damping device of electric automobile |
| CN107623392A (en) * | 2015-12-28 | 2018-01-23 | 浙江兆丰机电股份有限公司 | A kind of hub motor for electric automobile with electromagnetism damping device |
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