CN2586286Y - A.C. brushless double-feedback dynamo - Google Patents
A.C. brushless double-feedback dynamo Download PDFInfo
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- CN2586286Y CN2586286Y CN 02290388 CN02290388U CN2586286Y CN 2586286 Y CN2586286 Y CN 2586286Y CN 02290388 CN02290388 CN 02290388 CN 02290388 U CN02290388 U CN 02290388U CN 2586286 Y CN2586286 Y CN 2586286Y
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Abstract
The utility model relates to an A. C. brushless double-feedback motor, a stator winding of which is provided with p and q two different pole pair numbers, a rotor winding is a phase conversion pole change winding which is formed by connecting m pieces of m-phase star connections in parallel, the pole change ratio of the phase conversion pole change winding is p/q, the rotor winding is provided with 2m leading-out terminals, wherein, the m leading-out terminals of the p pole pairs form phase-sequence reversal connection with the m leading-out terminals of the q pole pair, the rotor can also be provided with the other set of m-phase winding which is provided with the p pole pairs, or the two set are respectively a star connected m-phase winding which is provided with p pole pairs and an m-phase winding which is provided with q pole pairs, or a set of rotor winding is the phase conversion pole change winding which is formed by connecting m pieces of the m-phase star connections in parallel, and the pole change ratio of the phase conversion pole change winding is p/q. The utility model adopts a single winding to replace two sets of rotor windings in a general double-feedback speed regulation machine set as far as possible, and the goal of simplifying the structure of the mo tor can be obtained; the utility model utilizes the characteristics of a 3Y connection in parallel phase conversion pole change winding, a rotor winding conductor can be obtained reutilization, and the effect of two sets of windings can be completely achieved just by one set of winding. The A. C. brushless double-feedback motor has the advantages of reduction in volume and flexible mode of connection.
Description
Technical field
The utility model belongs to technical field of motors, is specifically related to a kind of alternating-current brushless double feedback electric engine.This motor adopts the interchange wound rotor to replace existing cage modle short-circuited winding rotor, to obtain better technical performance.
Background technology
The alternating-current brushless double feedback electric engine is applicable to frequency conversion speed-adjusting system, is characterized in that reliable and required frequency inverter capacity is little etc.Two cover windings are arranged on this motor stator, and a cover number of pole-pairs is p, and another set of number of pole-pairs is q.When electrical network stator winding p energized, producing the magnetic pole logarithm is the rotating magnetic field of p, induced current is except that producing p to the pole field in the rotor, also produce q to pole field, these two kinds of relative rotors in magnetic field, direction of rotation is opposite, as at this moment connecing variable frequency power supply at stator q winding, change the frequency of variable frequency power supply, just can change motor speed.
" principle of brushless double feed frequency-conversion and speed-regulation motor and the application prospect in the haul of power plant subsidiary engine " (" electrotechnics magazine ", 2002 the 1st phases, P7-10) operation principle of brushless double feed frequency-conversion and speed-regulation motor and some problems that existing brushless double feed governing system exists have been introduced.The brushless double feed frequency-conversion and speed-regulation motor wants that preferable performance is arranged, and key is rotor.The rotor structure of Recent study mainly contains two kinds, and a kind of is reluctance rotor, and another kind is a cage modle short-circuited winding rotor.Because its iron core of reluctance rotor must be made the structure of similar salient pole, its winding of cage modle short-circuited winding rotor must be made concentric type distribution short-circuited winding, under the restriction of these conditions, make these two kinds of rotors can only be applicable to specific number of poles, and its performance index have been compared suitable gap with conventional AC motor rotor, and volume is also bigger etc.
The utility model content
The purpose of this utility model is to provide a kind of alternating-current brushless double feedback electric engine that can overcome above-mentioned defective, and this rotor is compared with cage modle short-circuited winding rotor has better technical performance, and volume reduces, the mode of connection is flexible.
For realizing above-mentioned utility model purpose, alternating-current brushless double feedback electric engine of the present utility model, its stator winding has two kinds of different numbers of pole-pairs of p and q, the rotor winding is that the individual m phase Y-connection of m (m for greater than 2 integer) that constitute, pole-changing in parallel is than being the commutation variable-pole winding of p/q, the rotor winding has 2m leading-out terminal, and wherein p is connected as negative-phase sequence m leading-out terminal of the utmost point with q m leading-out terminal of the utmost point.
Also can have another set of p on the above-mentioned rotor to utmost point m phase winding, the p of commutation variable-pole winding is connected as negative-phase sequence m leading-out terminal of the utmost point with q after to utmost point m phase winding serial connection a utmost point m leading-out terminal and p again.
Perhaps on rotor, also have p that two covers in addition are respectively star-like connection to utmost point m phase winding and q to utmost point m phase winding.The p of commutation variable-pole winding is connected as negative-phase sequence utmost point m phase winding with q a utmost point m leading-out terminal, and q is connected as negative-phase sequence utmost point m phase winding with p m leading-out terminal of the utmost point.
Also can on rotor, also have a cover rotor winding and be the individual m phase Y-connection of m (m for greater than 2 integer) that constitute, pole-changing in parallel than being the commutation variable-pole winding of p/q, the rotor winding has 2m leading-out terminal, and wherein p is connected as negative-phase sequence m leading-out terminal of the utmost point with q m leading-out terminal of the utmost point; Two cover windings are done negative-phase sequence connection to m leading-out terminal of the utmost point and another set of winding q to m leading-out terminal of the utmost point by a cover winding p and are linked in sequence.
Basic thought of the present utility model derives from by two rotor windings and makes the doubly-fed adjustable speed unit that negative-phase sequence tandem connection wound type induction motor constitutes.This doubly-fed adjustable speed unit has good speed governing effect, but volume is bigger, and structure is also complicated.Idea of the present utility model is to accomplish to adopt simplex winding to replace the cover of two in doubly-fed adjustable speed unit rotor winding as far as possible, to reach the purpose of simplifying electric machine structure.For this reason, the utility model proposes the conception of " reflex utilization " to the formation of wound rotor winding, utilize alternating current machine variable-pole winding theory, adopt the method for " series connection of heteropole negative-phase sequence " to make twice of rotor winding recycling, also promptly to two kinds of numbers of pole-pairs in the same set of rotor winding, all can produce induced potential and can play double action mutually as the excitation source of the other side's negative-phase sequence again.It should be noted that, compare with common cage structure rotor winding, it is different to the mechanism of these two opposite magnetic potentials of direction of rotation of the utmost point that the utility model rotor winding can produce simultaneously p and q, usually the p of cage rotor winding and q are to flow through electric current in the same conductor and produce to utmost point magnetic potential, the utility model rotor winding then is that the three phase winding negative-phase sequences that can regard two cover different poles logarithms on principle as are in series, every cover winding conductor only produces a kind of magnetic potential of number of pole-pairs, because utilized the characteristics of 3Y parallel connection method commutation variable-pole winding, thereby make the rotor winding conductor obtain recycling, only with the effect that can reach two cover windings once the cover winding fully.
In a word, compare with the cage structure rotor winding in the common brushless dual-feed motor, the utility model rotor winding has more characteristics.At first, the cage rotor winding is because of the restriction of structure, and produced simultaneously number of pole-pairs p and q can only be the relations of multipole proportion, and the number of pole-pairs p of the utility model rotor winding and q then are can be optional; Second, no matter the cage rotor winding is for number of pole-pairs p or q, winding distribution ratio is all not too high, harmonic content is also higher, this has directly limited its application, and the utility model utilizes commutation variable-pole winding theory, and two kinds of winding distribution ratios under the number of poles all are improved, and harmonic content then can reduce; The 3rd, the winding effective turn of number of pole-pairs p that the cage rotor winding produced and q is adjusted than being difficult to, the utility model rotor is the wound rotor winding because of what adopt, and it is much flexible that the mode of connection is wanted, and number of pole-pairs p and q winding effective turn ratio can be adjusted arbitrarily as required; The 4th, because the flexibility of wound rotor winding connection mode, characteristic of the present utility model is compared with common brushless dual-feed motor can a great difference.The utility model rotor winding can be designed to the winding effective turn of the another kind of relatively number of pole-pairs q of winding effective turn of a kind of number of pole-pairs p and want many, the number of pole-pairs p of rotor winding generation at this moment will be more much bigger than number of pole-pairs q magnetic potential amplitude, like this, when number of pole-pairs is the stator winding of the p power supply that gets access to grid, the utility model can directly move with number of pole-pairs p, rather than moves with number of pole-pairs p+q as common brushless dual-feed motor.
Description of drawings
Fig. 1 is the utility model p/q, the schematic diagram of the rotor winding of 3Y/3Y commutation pole-changing heteropole negative-phase sequence series connection;
Fig. 2 is the utility model p/q, the schematic diagram of the rotor winding of 3Y+Y/3Y commutation pole-changing heteropole negative-phase sequence series connection;
Fig. 3 is the utility model p/q, the schematic diagram of the rotor winding of 3Y+Y/3Y+Y commutation pole-changing heteropole negative-phase sequence series connection;
Fig. 4 is the utility model P/q, the rotor winding schematic diagram of 3Y+3Y/3Y+3Y commutation pole-changing heteropole negative-phase sequence series connection;
Fig. 5 is the utility model 2/1,24 groove, the schematic diagram of the rotor winding of 3Y/3Y commutation pole-changing heteropole negative-phase sequence series connection;
Fig. 6 is the utility model 3/2,36 groove, the schematic diagram of the rotor winding of 3Y+Y/3Y commutation pole-changing heteropole negative-phase sequence series connection;
Fig. 7 is the utility model 2/1,36 groove, the rotor winding schematic diagram of 3Y+3Y/3Y+3Y commutation pole-changing heteropole negative-phase sequence series connection.
Embodiment
Essence of the present utility model is that rotor winding mode is different from the rotor winding mode of existing alternating-current brushless double feedback electric engine, and other structure division of motor is same as the prior art, so following partly is further described the utility model with regard to the motor line winding rotor winding.
At first a kind of basic comprising with the utility model wound rotor winding is the example explanation.The essential part of the utility model rotor winding is that number of pole-pairs is the 3Y parallel connection method commutation variable-pole winding of p and q, and as shown in Figure 1, this 3Y parallel connection method commutation variable-pole winding has and is divided into 6 leading-out terminals of two groups, and every group of 3 leading-out terminals are labeled as p
a, p
b, p
cAnd q
a, q
b, q
c, respectively corresponding p, connects by the negative-phase sequence relation between two groups of terminals the utmost point the utmost point and q, also is p
aAnd q
c, p
bAnd q
b, p
cAnd q
aConnect respectively, its operation principle is as follows.
As everyone knows, the number of pole-pairs that is used for stator is the 3Y parallel connection method commutation variable-pole winding of p and q, if at leading-out terminal p
a, p
b, p
cInsert three phase mains, leading-out terminal q
a, q
b, q
cUnsettled, then present p to the utmost point; Otherwise, if at leading-out terminal q
a, q
b, q
cInsert three phase mains, leading-out terminal p
a, p
b, p
cUnsettled, then present q to the utmost point.The utility model is that 3Y parallel connection method commutation variable-pole winding is used for the rotor winding, and with leading-out terminal p
a, p
b, p
cAnd q
a, q
b, q
cNegative-phase sequence connects.Like this, when being placed with two covers that number of pole-pairs is respectively p and q on the stator during three phase windings, if be the stator winding of the p power supply that gets access to grid with number of pole-pairs, the rotor winding is because leading-out terminal p
a, p
b, p
cAnd q
a, q
b, q
cNegative-phase sequence connects, at this moment stator p to utmost point rotating magnetic field under the rotor current that produces of induction, remove because of from leading-out terminal p
a, p
b, p
cOutflow makes the rotor winding produce p to outside the utmost point rotating magnetic potential, also because of being injected into leading-out terminal q
a, q
b, q
cMake the rotor winding produce relative p to the q of utmost point reverse rotation to utmost point magnetic potential.Equally, when number of pole-pairs inserted variable frequency power supply for the q stator winding, the rotor winding also can produce q to utmost point rotating magnetic potential, and the p that can produce reverse rotation again is to utmost point rotating magnetic potential.Like this, when number of pole-pairs is the stator winding of the p power supply that gets access to grid, be the stator winding access variable frequency power supply of q simultaneously in number of pole-pairs, two cover stator winding interact by rotor, regulate the variable frequency power supply frequency, the utility model can enter the frequency control operating conditions as aforementioned brushless dual-feed motor.
Connection winding shown in Figure 2 is to the utmost point and the q A of a p to the utmost point that connected between to utmost point leading-out terminal at Fig. 1 winding p
p, B
p, C
pThree phase windings constitute, and regulate the turn ratio between this series connection winding winding in parallel with 3Y, can accomplish that number of pole-pairs p is bigger than number of pole-pairs q rotor magnetic potential amplitude.
Because connection winding shown in Figure 2 can accomplish that number of pole-pairs p is bigger than number of pole-pairs q rotor magnetic potential amplitude, this means that the utility model can be directly with number of pole-pairs p operation, at this time the suitable speed adjustable range of the utility model can be n=f
1/ (p+q) and n
1=(f
1/ p) between, in this scope, frequency converter will be always power output, do not feed back to electrical network and do not have electric energy by frequency converter.Obviously, in this case, the utility model will be particularly suitable for the speed governing of blower fan water pump class load, because this class load often only needs downward speed governing, speed adjustable range is also not too big.To this load, it is n that the utility model can be selected rated speed
1=(f
1/ p), at this time need not frequency converter can be as common single speed standard electromotor operate as normal.When needing speed governing, insert frequency converter and can enter the speed governing operating conditions, at this moment the utility model rotating speed is n=((f
1+ f
2)/(p+q)).As long as rotating speed is not less than n=f
1/ (p+q), frequency converter is just incited somebody to action power output always, does not have energy and turns back to power supply.
Also can be at the leading-out terminal p of 3Y winding in parallel
a, p
b, p
cAnd q
a, q
b, q
cRespectively negative-phase sequence be connected in series number of pole-pairs be respectively p and q two the cover three phase windings, as shown in Figure 3, a benefit of this connection is that part winding in parallel can be not limited to the 3Y connection, also can be 3Y/4Y or other many star parallel connection method.
Figure 4 shows that the another kind of connection plan of the utility model rotor winding.What Fig. 4 adopted is that two cover connections are identical, pole-changing is than being the 3Y parallel connection method commutation variable-pole winding of p/q, also press the thought of above-mentioned " reflex utilization ", the p of employing one cover winding connects three leading-out terminal negative-phase sequences of the utmost point with another set of winding q three leading-out terminals of the utmost point, the benefit that this connection is possible is the coil span of two cover windings, effectively turns-in-series, even winding coil connectivity scenario can be different, thereby more selection may be provided.
Figure 5 shows that 2p=4,2q=2, groove number are 24 rotor winding example.Wherein, 4 60 ° of facies tracts very, 2 120 ° of facies tracts very are the circulation that reduces between branch road, coil has adopted two kinds of different numbers of turn (distinguishing with subscript 1 and 2 among the figure).
Figure 6 shows that 2p=6,2q=4, groove number are 36 rotor winding example.6 90 ° of facies tracts very wherein, 3Y+Y connection, 4 60 ° of facies tracts very, 3Y connection.
Figure 7 shows that 2p=4,2q=2, groove number are 36, the rotor winding example that adopts two cover 3Y parallel connection method commutation variable-pole winding heteropole negative-phase sequences to be connected in series mutually.Wherein, 4 utmost points and 2 utmost points are 120 ° of facies tracts, and coil has adopted three kinds of different numbers of turn (distinguishing with subscript 1,2,3 among the figure).
Below for example understand the type of attachment of the utility model rotor winding, the diversity of this form also has been described.In the practical application, can by the above basic principle, realize being connected of any groove number and number of poles rotor winding as the case may be.
Claims (4)
1. alternating-current brushless double feedback electric engine, its stator winding has two kinds of different numbers of pole-pairs of p and q, the rotor winding is that the individual m phase Y-connection of m (m for greater than 2 integer) that constitute, pole-changing in parallel is than being the commutation variable-pole winding of p/q, it is characterized in that, the rotor winding has 2m leading-out terminal, and wherein p is connected as negative-phase sequence m leading-out terminal of the utmost point with q m leading-out terminal of the utmost point.
2. according to the described motor of claim 1, it is characterized in that also having another set of p on this rotor to utmost point m phase winding, the p of commutation variable-pole winding is connected as negative-phase sequence m leading-out terminal of the utmost point with q after to utmost point m phase winding serial connection a utmost point m leading-out terminal and p again.
3. according to the described motor of claim 1, it is characterized in that, also have on this rotor p that two covers in addition are respectively star-like connection to utmost point m phase winding and q to utmost point m phase winding.The p of commutation variable-pole winding is connected as negative-phase sequence utmost point m phase winding with q a utmost point m leading-out terminal, and q is connected as negative-phase sequence utmost point m phase winding with p m leading-out terminal of the utmost point.
4. according to the described motor of claim 1, it is characterized in that, also has a cover rotor winding on this rotor and is the individual m phase Y-connection of m (m for greater than 2 integer) that constitute, pole-changing in parallel than being the commutation variable-pole winding of p/q, the rotor winding has 2m leading-out terminal, and wherein p is connected as negative-phase sequence m leading-out terminal of the utmost point with q m leading-out terminal of the utmost point; Two cover windings are done negative-phase sequence connection to m leading-out terminal of the utmost point and another set of winding q to m leading-out terminal of the utmost point by a cover winding p and are linked in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290388 CN2586286Y (en) | 2002-12-13 | 2002-12-13 | A.C. brushless double-feedback dynamo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02290388 CN2586286Y (en) | 2002-12-13 | 2002-12-13 | A.C. brushless double-feedback dynamo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2586286Y true CN2586286Y (en) | 2003-11-12 |
Family
ID=33749628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02290388 Expired - Fee Related CN2586286Y (en) | 2002-12-13 | 2002-12-13 | A.C. brushless double-feedback dynamo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2586286Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345372C (en) * | 2004-06-23 | 2007-10-24 | 河北工业大学电工厂 | Frequency variable speed-adjusting mechanism |
| CN102347654A (en) * | 2010-07-27 | 2012-02-08 | 永济新时速电机电器有限责任公司 | Rotor and pulse traction electric motor |
-
2002
- 2002-12-13 CN CN 02290388 patent/CN2586286Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100345372C (en) * | 2004-06-23 | 2007-10-24 | 河北工业大学电工厂 | Frequency variable speed-adjusting mechanism |
| CN102347654A (en) * | 2010-07-27 | 2012-02-08 | 永济新时速电机电器有限责任公司 | Rotor and pulse traction electric motor |
| CN102347654B (en) * | 2010-07-27 | 2013-09-11 | 永济新时速电机电器有限责任公司 | Rotor and pulse traction electric motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |