CN209402383U - A kind of three-phase symmetrical alternating current becomes the alternating current generator of single-phase alternating current - Google Patents
A kind of three-phase symmetrical alternating current becomes the alternating current generator of single-phase alternating current Download PDFInfo
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- CN209402383U CN209402383U CN201920028539.6U CN201920028539U CN209402383U CN 209402383 U CN209402383 U CN 209402383U CN 201920028539 U CN201920028539 U CN 201920028539U CN 209402383 U CN209402383 U CN 209402383U
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Abstract
The utility model discloses the alternating current generators that a kind of three-phase alternating current becomes single-phase alternating current, comprising: the rotor on alternating current generator single-turn axis is arranged in, and is provided with Damper Winding on rotor；It is set in the first segment stator of rotor one end, the first input winding and the first output winding are provided on first segment stator；The second segment stator being set in the middle part of rotor is provided with the second input winding and the second output winding on second segment stator；It is set in the third section stator of the rotor other end, third input winding and third output winding are provided on third section stator；First output winding, the second output winding are connected with third output winding；120 ° of electrical angles of axis of the advanced second input winding of the axis of first input winding state 240 ° of electrical angles of axis of the advanced third input winding of axis of the first input winding.Three-phase alternating current is become single-phase alternating current by the alternating current generator of the utility model, solves the problems, such as three-phase imbalance, and high reliablity cost is lower.
Description
Technical field
The invention belongs to technical field of motors, and in particular to a kind of three-phase symmetrical alternating current becomes the alternating current of single-phase alternating current
Machine.
Background technique
In global power industry, three-phase system alternating current has occupied absolute dominant position, but because single-phase load is deposited
Leading to three-phase load, there is also imbalance problems.China's electric railway uses single phase industrial frequency AC system formula, but three-phase current
Imbalance, harmonic wave, idle problem still remain, especially the most prominent with three-phase current unbalance problem.To solve this problem, exist
In the prior art, electric railway generallys use following two mode: 1, the Semiconductor Converting Technology route directly handed over using friendship；2, using base
In the three phase combined cophase supply device technology path of the list of symmetrical compensation principle.Though they solve three-phase current unbalance,
Harmonic wave, idle problem, but there is also system complex, the disadvantage that cost is high, reliability is relatively low.
Summary of the invention
In order to overcome the above technical defects, the present invention provides the exchanges that a kind of three-phase symmetrical alternating current becomes single-phase alternating current
Motor inputs winding by changing the first input winding, the first output winding, the second input winding, the second output winding, third
With the spatial position of third output winding, three-phase alternating current is become into single-phase alternating current, solves the problems, such as three-phase imbalance, is tied
Structure is simple, high reliablity and cost is lower.
To solve the above-mentioned problems, the present invention is achieved by following technical scheme:
A kind of three-phase symmetrical alternating current becomes the alternating current generator of single-phase alternating current, comprising:
Rotor on alternating current generator single-turn axis is set, and is provided with Damper Winding on the rotor；
It is set in the first segment stator of described rotor one end, the first input winding and are provided on the first segment stator
One output winding；
The second segment stator being set in the middle part of the rotor is provided with the second input winding and on the second segment stator
Two output windings；
Be set in the third section stator of the rotor other end, be provided on the third section stator third input winding and
Third exports winding；
The first output winding, the second output winding are connected with third output winding；
The first input winding is connected to the first output winding by electromagnetic coupling, and the second input winding is logical
It crosses electromagnetic coupling and is connected to the second output winding, it is defeated that third input winding by electromagnetic coupling is connected to the third
Winding out；
120 ° of electrical angles of axis of the advanced second input winding of the axis of the first input winding, described first is defeated
Enter 240 ° of electrical angles of axis of the axis of the winding third input winding in advance.
Compared with prior art, alternating current generator of the invention is by changing the first input winding, the first output winding, second
The spatial position for inputting winding, the second output winding, third input winding and third output winding, is arranged by the space of winding
Column, so that leading phase lags, lag is mutually advanced, so that the voltage-phase for realizing output three-phase windings is identical, to obtain list
Phase alternating current, structure is simple, high reliablity, and can be directly transformed by existing alternating current generator, low cost.
As a further improvement of the present invention, it is described first output winding axis, it is described second output winding axis,
The axis of the third output winding must keep spatially straight line.
As a further improvement of the present invention, advanced described first input, 90 ° of electrical angles of winding of the first output winding,
Described advanced described second input, 210 ° of electrical angles of winding of second output winding, the third is defeated in advance for the third output winding
Enter 330 ° of winding.
As a further improvement of the present invention, the first output winding, the second output winding and the third are defeated
Windings in series out.
As a further improvement of the present invention, the first output winding, the second output winding and the third are defeated
Winding parallel out.
As a further improvement of the present invention, the first input winding, the second input winding and the third are defeated
Entering winding can be used one of distributed winding, short distance winding, Concentrical winding, sine windings or a variety of.
As a further improvement of the present invention, the rotor is uniaxial iron core, and the rotor be cage rotor, around
Wire type rotor, permanent magnet rotor, DC excitation formula structure one kind.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
The integrally-built schematic diagram of Fig. 1 present invention；
The schematic diagram of Fig. 2 partial structurtes of the present invention；
The schematic diagram of Fig. 3 partial structurtes of the present invention；
The schematic diagram of Fig. 4 partial structurtes of the present invention；
The schematic diagram of Fig. 5 embodiment of the present invention one；
The schematic diagram of Fig. 6 embodiment of the present invention one；
The schematic diagram of Fig. 7 embodiment of the present invention one；
The schematic diagram of Fig. 8 embodiment of the present invention one；
The waveform diagram of one input voltage of Fig. 9 embodiment of the present invention and output voltage；
Two input current of Figure 10 embodiment of the present invention and the waveform diagram for exporting electric current.
Description of symbols:
1- first segment stator；2- second segment stator；3- third section stator；4- rotor；5- first inputs winding；6- first is defeated
Winding out；7- second inputs winding；8- second exports winding；9- third inputs winding；10- third exports winding；11- damping around
Group.
100- motor single-turn axis.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
The invention discloses the alternating current generators that a kind of three-phase symmetrical alternating current becomes single-phase alternating current, as Figure 1-Figure 4, if
The rotor on alternating current generator single-turn axis 100 is set, and is provided with Damper Winding 11 on rotor；It is set in the of 4 one end of rotor
One section of stator 1 is provided with the first input winding 5 and the first output winding 6 on first segment stator 1；It is set in the of the middle part of rotor 4
Two sections of stators 2 are provided with the second input winding 7 and the second output winding 8 on second segment stator 2；It is set in 4 other end of rotor
Third section stator 3 is provided with third input winding 9 and third output winding 10 on third section stator 3；First output winding 6, the
Two output windings 8 are connected with third output winding 10；First input winding 5 is connected to the first output winding by electromagnetic coupling
6, the second input winding 7 is connected to the second output winding 8 by electromagnetic coupling, and third inputs winding 9 and connected by electromagnetic coupling
Winding 10 is exported in third；120 ° of electrical angles of axis of the advanced second input winding 7 of the axis of first input winding 5, first is defeated
Enter 240 ° of electrical angles of axis of the advanced third input winding 9 of axis of winding 5.Rotor 4, first segment stator 1, second segment stator 2
Refer to the prior art for the setting of Damper Winding 11 in setting and rotor with third section stator 3, will not repeat them here.
By the space arrangement of winding, so that leading phase lags, lag is mutually advanced, to realize output three-phase windings
Voltage-phase is identical.Simultaneously as flume structure Damper Winding 11 is provided on rotor 4, for eliminating the electricity of 2 frequencys multiplication in rotor
Stream and slot ripples, rotor 4 are in unloaded rotation status synchronous or close to synchronous rotational speed.Meanwhile first segment stator can also be eliminated
1, the negative phase-sequence magnetomotive force in second segment stator 2 and third section stator 3.
When the first input winding 5, second inputs winding input 7 and third input 9 symmetrical three-phase symmetric voltage of winding,
Generate rotating excitation field in motor, rotor 7 driven to rotate, at this point, the first output winding 6, second export winding 8 and third output around
Group 10 generates same-phase induced electromotive force.
Further, the axis of the axis of the first output winding 6, the axis of the second output winding 8, third output winding 10
It must keep spatially straight line.
According to the time of alternating current generator, space uniformity principle, when alternating current time phasor is passed by θ electrical angle, motor
Magnetic field space vector will pass by the principle of the space θ electrical angle, and input winding and the axis angle α for exporting winding can be at 0 ° extremely
It is arbitrarily set between 360 °.
Further, the first output winding 6 advanced first inputs 5 90 ° of electrical angles of winding, and the second output winding 8 is stated in advance
Second input 9 210 ° of electrical angles of winding, third export the advanced third of winding 10 and input 9 330 ° of electrical angles of winding.
In order to weaken higher hamonic wave well, the first output winding 6, second exports winding 8 and third exports winding
10 series connection, using concatenated mode, then without considering the different problem of the three-stage parameter of electric machine.
Further, the first output winding 6, second exports winding 8 and third output winding 10 is in parallel, using side in parallel
Formula then needs to guarantee three-stage parameter of electric machine strict conformance.
Further, first input winding 5, second input winding 7 and third input winding 9 can be used distributed winding,
One of short distance winding, Concentrical winding, sine windings are a variety of.
Further, rotor 4 is uniaxial iron core, and rotor 4 be cage rotor, phase-wound rotor, permanent magnet rotor,
One kind of DC excitation formula structure.Pass through DC excitation formula rotor regulating power factor.
The present invention is further explained combined with specific embodiments below.
A Y2 132S-4 ac motor structure is chosen in the present embodiment to be transformed.Through rotor uses 28 slots
Common cast-aluminum rotor, outer diameter 135.2mm, internal diameter 38mm.Stator uses 48 slot structures, and core length 105mm, outer diameter 210mm are interior
Diameter 136mm, using No. 2 stator groove profiles.Winding deployment scenarios are shown in figure 5-8, and subscript number is coil turn, acceptance of the bid number in figure
Stator slot number, under be designated as coil spread.First defeated people's winding 5, second input winding 7, third input winding 9, first output around
The 6, second output winding 8 of group and third output winding 10 are all made of sine windings, winding coefficient 0.806.It revolves counterclockwise
Turn, the first input winding 5 is at 0 °, and the second input winding 7, third input winding 9 are respectively at 120 °, and 240 ° of positions, first exports
Winding 6, second exports winding 8 and third output winding 10 90 ° of positions.
As shown in table 1- table 2 and Fig. 9-Figure 10, table 1 is the covert input end of motor test data of exchange of the invention, and table 2 is
The covert motor output end test data of exchange of the invention, it can be seen that when the load of access is 0KW, the first input winding
The voltage U2 of the input winding 7 of 5 voltage U1 and second differs 119.9 ° of electrical angle, the voltage U2 of the second 7 windings of input and the
The voltage U3 of three input windings 9 differs 119.5 ° of electrical angle, and third inputs the input winding 5 of voltage U3 and first of winding 9
Voltage U1 differs 120 ° of electrical angle.At this point, output voltage is 252V, no output electric current.
When the load of access is 1KW, the voltage U2 difference of the input winding 7 of voltage U1 and second of the first input winding 5
120 ° of electrical angle, the voltage U2 of the second input winding 7 and the voltage U3 of third input winding 9 differ 119.5 ° of electrical angle,
The voltage U1 that third inputs the input winding 5 of voltage U3 and first of winding 9 differs 120.6 ° of electrical angle.At this point, output voltage
For 240V, output electric current is 4.64A, and output voltage differs 358 ° of electrical angle with output electric current.
When the load of access is 2KW, the voltage U2 difference of the input winding 7 of voltage U1 and second of the first input winding 5
120.1 ° of electrical angle, the voltage U2 of the second input winding 7 and the voltage U3 of third input winding 9 differ 119.5 ° of electric angle
Degree, the voltage U1 that third inputs the input winding 5 of voltage U3 and first of winding 9 differ 120.5 ° of electrical angle.At this point, output electricity
Pressure is 229V, and output electric current is 9.23A, and output voltage differs 357 ° of electrical angle with output electric current.
When the load of access is 3KW, the voltage U2 difference of the input winding 7 of voltage U1 and second of the first input winding 5
119.9 ° of electrical angle, the voltage U2 of the second input winding 7 and the voltage U3 of third input winding 9 differ 119.6 ° of electric angle
Degree, the voltage U1 that third inputs the input winding 5 of voltage U3 and first of winding 9 differ 120.6 ° of electrical angle.At this point, output electricity
Pressure is 218V, and output electric current is 13.57A, and output voltage differs 357 ° of electrical angle with output electric current.
When the load of access is 4KW, the voltage U2 difference of the input winding 7 of voltage U1 and second of the first input winding 5
119.9 ° of electrical angle, the voltage U2 of the second input winding 7 and the voltage U3 of third input winding 9 differ 119.6 ° of electric angle
Degree, the voltage U1 that third inputs the input winding 5 of voltage U3 and first of winding 9 differ 120.5 ° of electrical angle.At this point, output electricity
Pressure is 206V, and output electric current is 17.73A, and output voltage differs 357 ° of electrical angle with output electric current.
When the load of access is 5KW, the voltage U2 difference of the input winding 7 of voltage U1 and second of the first input winding 5
120.1 ° of electrical angle, the voltage U2 of the second input winding 7 and the voltage U3 of third input winding 9 differ 119.5 ° of electric angle
Degree, the voltage U1 that third inputs the input winding 5 of voltage U3 and first of winding 9 differ 120.4 ° of electrical angle.At this point, output electricity
Pressure is 196V, and output electric current is 21.62A, and output voltage differs 357 ° of electrical angle with output electric current.
It is learnt by above-mentioned data, when output single-phase load changes, one time input current is always maintained at balance, this hair
Bright alternating current generator is able to achieve the symmetry transformation that three-phase symmetrical alternating current becomes single-phase alternating current.
Due to the influence of manufacturing process and winding leakage impedance, lead to actually measured voltage, electric current and theoretical value slightly
Deviation, but this deviation is within tolerance interval.
Table 1
Table 2
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore
Without departing from the technical solutions of the present invention, according to the technical essence of the invention it is to the above embodiments it is any modification,
Equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (6)
1. the alternating current generator that a kind of three-phase symmetrical alternating current becomes single-phase alternating current characterized by comprising
Rotor on alternating current generator single-turn axis is set, and is provided with Damper Winding on the rotor；
It is set in the first segment stator of described rotor one end, the first input winding and first defeated is provided on the first segment stator
Winding out；
The second segment stator being set in the middle part of the rotor is provided with the second input winding and second defeated on the second segment stator
Winding out；
It is set in the third section stator of the rotor other end, third input winding and third are provided on the third section stator
Export winding；
The first output winding, the second output winding are connected with third output winding；
The first input winding is connected to the first output winding by electromagnetic coupling, and the second input winding passes through electricity
Magnetic coupling is connected to the second output winding, third input winding by electromagnetic coupling be connected to the third export around
Group；
120 ° of electrical angles of axis of the advanced second input winding of the axis of the first input winding, first input around
240 ° of electrical angles of axis of the axis of group third input winding in advance.
2. alternating current generator according to claim 1, which is characterized in that the axis of the first output winding, described second
The axis of the axis, third output winding that export winding must keep spatially straight line.
3. alternating current generator according to claim 1, which is characterized in that it is described first output winding, it is described second output around
Group and the third export windings in series.
4. alternating current generator according to claim 1, which is characterized in that it is described first output winding, it is described second output around
Group and the third export winding parallel.
5. alternating current generator according to claim 1, which is characterized in that it is described first input winding, it is described second input around
One of distributed winding, short distance winding, Concentrical winding, sine windings or more can be used in group and third input winding
Kind.
6. alternating current generator according to claim 1, which is characterized in that the rotor is uniaxial iron core, and the rotor
For cage rotor, phase-wound rotor, permanent magnet rotor, DC excitation formula structure one kind.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920028539.6U CN209402383U (en) | 2019-01-08 | 2019-01-08 | A kind of three-phase symmetrical alternating current becomes the alternating current generator of single-phase alternating current |
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| CN201920028539.6U CN209402383U (en) | 2019-01-08 | 2019-01-08 | A kind of three-phase symmetrical alternating current becomes the alternating current generator of single-phase alternating current |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450205A (en) * | 2019-01-08 | 2019-03-08 | 中铁电气化局集团有限公司第二工程分公司 | A kind of three-phase symmetrical alternating current becomes the alternating current generator of single-phase alternating current |
| CN111969859A (en) * | 2020-09-22 | 2020-11-20 | 中铁电气化局集团有限公司 | Traction power supply method for converting three-phase symmetrical alternating current into single-phase alternating current |
-
2019
- 2019-01-08 CN CN201920028539.6U patent/CN209402383U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450205A (en) * | 2019-01-08 | 2019-03-08 | 中铁电气化局集团有限公司第二工程分公司 | A kind of three-phase symmetrical alternating current becomes the alternating current generator of single-phase alternating current |
| CN109450205B (en) * | 2019-01-08 | 2024-06-11 | 中铁电气化局集团有限公司 | AC motor for converting three-phase symmetrical AC into single-phase AC |
| CN111969859A (en) * | 2020-09-22 | 2020-11-20 | 中铁电气化局集团有限公司 | Traction power supply method for converting three-phase symmetrical alternating current into single-phase alternating current |
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