CN202978667U - Variable-frequency transformer - Google Patents
Variable-frequency transformer Download PDFInfo
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- CN202978667U CN202978667U CN 201220685155 CN201220685155U CN202978667U CN 202978667 U CN202978667 U CN 202978667U CN 201220685155 CN201220685155 CN 201220685155 CN 201220685155 U CN201220685155 U CN 201220685155U CN 202978667 U CN202978667 U CN 202978667U
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- 230000009466 transformation Effects 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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Abstract
A variable-frequency transformer comprises a stator, a rotor and a rotary shaft, and is characterized in that the stator comprises a stator core, a stator slot, a stator three-phase power winding and a stator three-phase control winding, wherein the stator three-phase power winding and the stator three-phase control winding are arranged in the stator slot from top to bottom; the rotor comprise a rotor core, a rotor slot, a permanent magnet slot, a rotor three-phase power winding and a permanent magnet; a group of three-phase slide rings is fixedly mounted on the rotary shaft, electric three-phase brushes are correspondingly mounted on the three-phase slide rings, the stator three-phase power winding is connected with a first three-phase power grid, the rotor three-phase power winding is connected with a second three-phase power grid, and the stator three-phase control winding is connected with a reversible converter. A variable-frequency transformation motor and a driving motor are integrated into the variable-frequency transformer sharing one core, and the structure of the variable-frequency transformer is greatly simplified. Meanwhile, size of the variable-frequency transformer is reduced, manufacturing cost of the transformer can be saved, on-site assembly and maintenance are facilitated, and operating reliability of the variable-frequency transformer is improved.
Description
Technical field
The utility model relates to a kind of variable-frequency transformer, especially a kind of variable-frequency transformer that is applicable in electrical technology field.
Background technology
Two electrical networks for different frequency can not directly connect, and need to carry out by variable-frequency transformer the conversion of frequency and voltage, then the connection of being incorporated into the power networks.In the fields such as contacted system between wind generator system, electrical network, variable-frequency transformer has wide practical use.Present variable-frequency transformer has power electronics variable-frequency transformer and two kinds of forms of mechanical type variable-frequency transformer.There are the deficiencies such as volume is large, control complexity, finite capacity in the power electronics variable-frequency transformer.Present mechanical type variable-frequency transformer is comprised of two coaxial motors that are connected of variable-frequency variable-voltage motor (being wound asynchronous motor) and drive motors.This system is because independent drive motors of needs is connected with wound asynchronous motor is coaxial, and system configuration is complicated; In addition, shaft system of unit is long, and bearing pedestal is many, axle is shaken higher with watt amplitude, and is unfavorable to the safe operation stable and unit of axle system.
Summary of the invention
Technical problem: the purpose of this utility model is the weak point that overcomes in prior art, proposes a kind of variable-frequency transformer of simple in structure, easy to operate, shared iron core that variable-frequency variable-voltage motor and drive motors are integrated in one.
Technical scheme: variable-frequency transformer of the present utility model, comprise stator core, stator slot, rotor and rotating shaft, be provided with stator three phase power winding on described stator slot upper strata, lower floor is provided with stator three phase control windings, described stator three phase power winding is connected with three phase network one, and described stator three phase control windings are connected with reversible frequency converter; The rotor core surface cutting of described rotor has rotor slot, is provided with the rotor three-phase power winding of Y-connection in rotor slot; The inner cutting of rotor core has permanent magnet trough, is placed with permanent magnet in permanent magnet trough; Be installed with three-phase slip-ring in described rotating shaft, three-phase slip-ring is connected with the head end of rotor three-phase power winding respectively, and on three-phase slip-ring, correspondence is equipped with the three-phase brush, and the three-phase brush is connected with three phase network two.
The number of pole-pairs p of described stator three phase power winding
pNumber of pole-pairs p with rotor three-phase power winding
pIdentical; The number of pole-pairs p of described stator three phase control windings
cNumber of pole-pairs p with permanent magnet in described rotor
cIdentical; Described number of pole-pairs p
cP
p, and p
c=2 ' k ' p
p, (k=1,2,3 ...).
Beneficial effect: the utility model has made up the defective of existing machinery formula variable-frequency transformer, compared with prior art, has following advantage:
1, variable-frequency transformer does not have the independent drive motors of coaxial connection, variable voltage variable frequency motor and drive motors share a cover iron core, the winding of variable voltage variable frequency motor and drive motors all is placed in same iron core, so just simplified widely the structure of variable-frequency transformer, also reduced simultaneously the volume of variable-frequency transformer, can save the manufacturing cost of variable-frequency transformer, facilitate assembled in situ and maintenance, improve the operational reliability of variable-frequency transformer;
2, number of pole-pairs p
cP
p, and p
c=2 ' k ' p
p, (k=1,2,3 ...) design make the power winding of new construction variable-frequency transformer and the coupling that controls between winding can be eliminated substantially, make the efficient of motor more excellent.
Description of drawings
Fig. 1 is the utility model variable-frequency transformer sectional arrangement drawing;
Fig. 2 is that the utility model variable-frequency transformer B-B cuts open sectional view;
Fig. 3 is the circuit structure diagram of the utility model variable-frequency transformer.
Wherein: the 1-stator core; The 2-stator slot; 3-stator three phase power winding; 4-stator three phase control windings; The 5-rotor core; The 6-rotor slot; The 7-permanent magnet trough; 8-rotor three-phase power winding; The 9-permanent magnet; The 10-three-phase slip-ring; 11-three-phase brush; The 12-rotating shaft.GRID1-three phase network one; GRID2-three phase network two; The reversible frequency converter of RPC-.
Embodiment
Below in conjunction with accompanying drawing, an embodiment of the present utility model is further described:
As shown in Fig. 1, Fig. 2 and Fig. 3, variable-frequency transformer of the present utility model comprises stator, rotor and rotating shaft 12, described stator comprises stator core 1, stator slot 2, be placed on the stator three phase power winding 3 on said stator wire casing 2 upper stratas and be placed on the stator three phase control windings 4 of said stator wire casing 2 lower floors, described stator three phase power winding 3 is connected with three phase network one GRID1, and described stator three phase control windings 4 are connected with reversible frequency converter RPC.Described rotor comprises rotor core 5, rotor slot 6, permanent magnet trough 7, rotor three-phase power winding 8 and permanent magnet 9; In described rotor core 5 surface cuttings, rotor slot 6 is arranged, place the rotor three-phase power winding 8 of Y-connection in described rotor slot 6; Inner cutting of described rotor core 5, permanent magnet trough 7 is arranged, place permanent magnet 9 in described permanent magnet trough 7.Be installed with one group of three-phase slip-ring 10 in described rotating shaft 12, described three-phase slip-ring 10 is connected with the head end of described rotor three-phase power winding 8 respectively, correspondence is equipped with three-phase brush 11 on described three-phase slip-ring 10, and described three-phase brush 11 is connected with three phase network two GRID2.The number of pole-pairs p of described stator three phase power winding 3
pNumber of pole-pairs p with rotor three-phase power winding 8
pIdentical; The number of pole-pairs p of described stator three phase control windings 4
cNumber of pole-pairs p with permanent magnet 9 in described rotor
cIdentical; Described number of pole-pairs p
cP
p, and p
c=2 ' k ' p
p, (k=1,2,3 ...).
Operation principle and the course of work: variable-frequency transformer of the present utility model comprises variable-frequency variable-voltage subsystem (being the wound asynchronous motor subsystem) and permanent-magnet synchronous driver sub-system.For example, the number of pole-pairs of stator three phase power winding 3 is identical with the number of pole-pairs of described rotor three-phase power winding 8, is all p
p=1; The number of pole-pairs of the permanent magnet 9 in the number of pole-pairs of stator three phase control windings 4 and described rotor is identical, is all p
c=6.The variable-frequency variable-voltage subsystem is by stator core 1, rotor core 5, number of pole-pairs p
p=1 stator three phase power winding 3, number of pole-pairs p
p=1 rotor three-phase power winding 8, three-phase slip-ring 10 and three-phase brush 11 form; The permanent-magnet synchronous driver sub-system is p by stator core 1, rotor core 5, number of pole-pairs
c=6 stator three phase control windings 4 and number of pole-pairs are p
c=6 rotor permanent magnet 9 forms.The stator three phase power winding 3 of variable-frequency transformer of the present utility model is connected with three phase network one GRID1, and rotor three-phase power winding 8 is connected with three phase network two GRID2 with three-phase brush 11 by three-phase slip-ring 10; Reversible frequency converter RPC is connected with stator three phase control windings 4, for the permanent-magnet synchronous driver sub-system provides variable frequency power supply.
If the frequency of three phase network one GRID1 is f
1, the frequency of three phase network two GRID2 is f
2, the number of turn of stator three phase power winding 3 is N
1, winding coefficient is k
w1, the number of turn of rotor three-phase power winding 8 is N
2, winding coefficient is k
w2, stator three phase power winding 3 is all identical with rotor three-phase power winding 8 numbers of pole-pairs, by Electrical Motor knowledge as can be known, can realize the transmission of AC energy between stator three phase power winding 3 and rotor three-phase power winding 8, and stator three phase power winding 3 phase voltage U
1With rotor three-phase power winding 8 phase voltage U
2Satisfied pass is:
Known by formula (1), design different stator three phase power windings 3 and rotor three-phase power winding 8 numbers of turn just can obtain different output voltage grades, thereby realized the time variant voltage function.
When the frequency of three phase network one GRID1 is f
1, the frequency of three phase network two GRID2 is f
2, by Electrical Motor knowledge as can be known, the rotation speed n of its rotor during variable-frequency transformer stable operation
rMust satisfy formula (2), that is:
（2）
Drive the utility model variable-frequency transformer by reversible Frequency Converter Control permanent-magnet synchronous driver sub-system, make its spinner velocity satisfy the rotating speed of formula 2, are connected the mains frequency that the electromotive force frequency that induces will be respectively connects with their with rotor three-phase power winding identical for stator three phase power winding 3 like this, realized the frequency conversion Energy Transfer between three phase network one GRID1 and three phase network two GRID2.
When the number of pole-pairs of stator three phase power around 3 groups and stator three phase control windings 4 satisfies: p
cP
p, and p
c=2 ' k ' Pp, (k=1,2,3 ...) time, the direct-coupling between stator three phase power winding 3 and stator three phase control windings 4 can be eliminated, and has greatly reduced the loss power between power winding and control winding.
Claims (2)
1. variable-frequency transformer, comprise stator core (1), stator slot (2), rotor and rotating shaft (12), it is characterized in that: be provided with stator three phase power winding (3) on described stator slot (2) upper strata, lower floor is provided with stator three phase control windings (4), described stator three phase power winding (3) is connected with three phase network one (GRID1), and described stator three phase control windings (4) are connected with reversible frequency converter (RPC); The rotor core of described rotor (5) surface is dug rotor slot (6), is provided with the rotor three-phase power winding (8) of Y-connection in rotor slot (6); The inner cutting of rotor core (5) has permanent magnet trough (7), is placed with permanent magnet (9) in permanent magnet trough (7); Be installed with three-phase slip-ring (10) in described rotating shaft (12), three-phase slip-ring (10) is connected with the head end of rotor three-phase power winding (8) respectively, the upper correspondence of three-phase slip-ring (10) is equipped with three-phase brush (11), and three-phase brush (11) is connected with three phase network two (GRID2).
2. variable-frequency transformer according to claim 1, is characterized in that: the number of pole-pairs p of described stator three phase power winding (3)
pNumber of pole-pairs p with rotor three-phase power winding (8)
pIdentical; The number of pole-pairs p of described stator three phase control windings (4)
cNumber of pole-pairs p with permanent magnet (9) in described rotor
cIdentical; Described number of pole-pairs p
cP
p, and p
c=2 ' k ' p
p, k=1,2,3 ...
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220685155 CN202978667U (en) | 2012-12-13 | 2012-12-13 | Variable-frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220685155 CN202978667U (en) | 2012-12-13 | 2012-12-13 | Variable-frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978667U true CN202978667U (en) | 2013-06-05 |
Family
ID=48519690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220685155 Expired - Lifetime CN202978667U (en) | 2012-12-13 | 2012-12-13 | Variable-frequency transformer |
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| Country | Link |
|---|---|
| CN (1) | CN202978667U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001453A (en) * | 2012-12-13 | 2013-03-27 | 中国矿业大学 | Frequency conversion transformer |
| CN104753279A (en) * | 2013-12-28 | 2015-07-01 | 黄劭刚 | Single-armature synchronous motor with AC frequency-conversion inductive brushless excitation |
| CN106712386A (en) * | 2017-01-09 | 2017-05-24 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | Multi-electricity system generator set |
| CN110112743A (en) * | 2019-04-04 | 2019-08-09 | 上海电力学院 | A kind of isolated form variable-frequency transformer and its starting control and expansion method |
| CN114050705A (en) * | 2021-11-23 | 2022-02-15 | 西安交通大学 | Electric excitation variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114050704A (en) * | 2021-11-23 | 2022-02-15 | 西安交通大学 | Built-in permanent magnet variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114123710A (en) * | 2021-11-23 | 2022-03-01 | 西安交通大学 | Variable-voltage frequency converter based on double-stator permanent magnet synchronous motor design |
| CN114123712A (en) * | 2021-11-23 | 2022-03-01 | 西安交通大学 | Voltage converter based on double-stator electric excitation synchronous motor design |
| CN114123711A (en) * | 2021-11-23 | 2022-03-01 | 西安交通大学 | Surface-mounted permanent magnet variable voltage frequency converter based on magnetic field modulation principle and design method |
-
2012
- 2012-12-13 CN CN 201220685155 patent/CN202978667U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001453A (en) * | 2012-12-13 | 2013-03-27 | 中国矿业大学 | Frequency conversion transformer |
| CN104753279A (en) * | 2013-12-28 | 2015-07-01 | 黄劭刚 | Single-armature synchronous motor with AC frequency-conversion inductive brushless excitation |
| CN104753279B (en) * | 2013-12-28 | 2017-12-01 | 黄劭刚 | AC frequency conversion senses single armature synchronous motor of brushless excitation |
| CN106712386A (en) * | 2017-01-09 | 2017-05-24 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | Multi-electricity system generator set |
| CN110112743A (en) * | 2019-04-04 | 2019-08-09 | 上海电力学院 | A kind of isolated form variable-frequency transformer and its starting control and expansion method |
| CN114050704A (en) * | 2021-11-23 | 2022-02-15 | 西安交通大学 | Built-in permanent magnet variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114050705A (en) * | 2021-11-23 | 2022-02-15 | 西安交通大学 | Electric excitation variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114123710A (en) * | 2021-11-23 | 2022-03-01 | 西安交通大学 | Variable-voltage frequency converter based on double-stator permanent magnet synchronous motor design |
| CN114123712A (en) * | 2021-11-23 | 2022-03-01 | 西安交通大学 | Voltage converter based on double-stator electric excitation synchronous motor design |
| CN114123711A (en) * | 2021-11-23 | 2022-03-01 | 西安交通大学 | Surface-mounted permanent magnet variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114050704B (en) * | 2021-11-23 | 2022-09-27 | 西安交通大学 | Built-in permanent magnet variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114123711B (en) * | 2021-11-23 | 2022-12-20 | 西安交通大学 | Surface-mounted permanent magnet variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114123712B (en) * | 2021-11-23 | 2022-12-20 | 西安交通大学 | Voltage converter based on double-stator electric excitation synchronous motor design |
| CN114050705B (en) * | 2021-11-23 | 2022-12-20 | 西安交通大学 | Electric excitation variable voltage frequency converter based on magnetic field modulation principle and design method |
| CN114123710B (en) * | 2021-11-23 | 2022-12-20 | 西安交通大学 | Variable-voltage frequency converter based on double-stator permanent magnet synchronous motor design |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20141119 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20141119 |
|
| RGAV | Abandon patent right to avoid regrant |