CN2243742Y - Series speed regulating system with six phase and dual 30 deg. shift and dual bridge conversion - Google Patents
Series speed regulating system with six phase and dual 30 deg. shift and dual bridge conversion Download PDFInfo
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- CN2243742Y CN2243742Y CN 94246115 CN94246115U CN2243742Y CN 2243742 Y CN2243742 Y CN 2243742Y CN 94246115 CN94246115 CN 94246115 CN 94246115 U CN94246115 U CN 94246115U CN 2243742 Y CN2243742 Y CN 2243742Y
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Abstract
The utility model relates to a series speed regulating system with six phases and dual 30 deg shift and dual bridge conversion, comprising a winding motor, a double bridge brake tube active inverter, a rotor rectifier and a trigger control device. The stator secondary winding with six phases and dual 30 deg is inlaid in the slot of the stator main winding. The utility model eliminates the fifth time, the seventh time, the eleventh time and the thirteen harmonic waves, reduces the harmonic pollution and the capacitance compensation capacity and raises the speed regulating efficiency and the power factor. The utility model has simple structure, low cost, and the speed regulating performance of the constant torque and is suitable for the non-stage speed regulation of the motors of blower fans and water pumps.
Description
The utility model belongs to asynchronous motor cascade adjustable-speed system class.
At present, the cascade adjustable-speed system that general winding motors adopts is that rotor current is drawn, and through over commutation, inversion, send into a contravariant transformer, feeds back to electrical network.Though this system has advantages such as speed efficiency height, good reliability, the harmonic wave that have that power factor is low, system produces is to deficiencies such as electric network pollution are bigger.For solving above-mentioned weak point, the employing that has at present a kind of " double bridge invert " system, this system includes doube bridge thyristor active inverter, two contravariant transformers etc.System with rotor current draw, through over commutation, double bridge invert is sent into two contravariant transformers, feeds back to electrical network.Adopt this kind double bridge invert (vertical continuous or fork phase) controlling schemes,, reduce " harmonic pollution ", reduce the capacitance compensation capacity though can eliminate 5 times, 7 subharmonic substantially.But because of system needs two contravariant transformers, or the two winding transformer of a particular design, make that its volume is big, cost is high, floor space is big.
The purpose of this utility model aims to provide a kind of " harmonic pollution " and capacitance compensation capacity that reduces electrical network, improves speed efficiency and power factor, simple in structure, cheap cascade adjustable-speed system.
The purpose of this utility model realizes that in the following manner a kind of six two mutually Y move 30 ° of double bridge invert cascade adjustable-speed systems, comprises winding motors, doube bridge thyristor active inverter, rotor rectifier and triggers control device.Being equipped with six two mutually Y in the groove of winding motors stator main winding moves 30 ° of stators and pays winding.Six two mutually Y move 30 ° of stators and pay winding and doube bridge thyristor inverter composition three-phase bridge two tunnel in parallel or connect in series.
With reference to the accompanying drawings the utility model is described.
Fig. 1 is equipped with six two mutually Y and moves the tandem control motor winding line map that 30 ° of stators are paid winding
The two mutually Y of Fig. 2 six move 30 ° of stators and pay every pair of pole span facies tract of winding interface chart
The two mutually Y of Fig. 3 six move 30 ° of doube bridge parallel inverter tandem control electric motor system schematic diagrams
The two mutually Y of Fig. 4 six move 30 ° of doube bridge series resonant inverter tandem control electric motor system schematic diagrams
The two mutually Y of Fig. 5 six move 30 ° of winding vector correlation figure
With reference to Fig. 1,1 is the stator main winding among the figure, and 2 is that six two mutually Y move 30 ° of stators and pay winding, and 3 is the rotor winding.Six two mutually Y move that 30 ° of stators are paid winding and the stator main winding is set with groove, but on electric mutual insulating, only there is the contact of magnetic in the two.
Adopt six two mutually Y to move 30 ° of windings, being about to usually, each facies tract of employing be connected in the form of star-connection " 60 ° of facies tract windings of spatial distribution " is divided into two facies tracts, a Y-connection is become spatially two Y-connections of 30 ° of electrical degrees of displacement each other, just constitute one six two mutually Y and move 30 ° of windings.At this moment the motor interior stator slot is along 12 facies tracts that are divided in the every pair of pole span in interior garden as shown in Figure 2, therefore this six two mutually Y ten two-phase winding of moving 30 ° of windings and symmetry are just the same, therefore also can be called ten two-phase inversion systems, its vector correlation is seen Fig. 5.
Though six two mutually Y move 30 ° of stators and pay winding and embed with groove with the stator main winding, β needn't be identical with the stator main winding for " short distance than " of its winding, can select flexibly as required.
Adopt the utility model, having six two mutually Y moves motor stator that 30 ° of stators pay winding and has replaced two contravariant transformers in the common doube bridge inversion system, form three-phase bridge two tunnel in parallel or series active inverters with the doube bridge thyristor, its concrete bind mode is seen Fig. 3, Fig. 4.
With reference to Fig. 3, R, S, T are that six two mutually Y move 30 ° of stators and pay winding and draw end points among the figure, and U, V, W draw end points for the stator main winding, and K, L, M draw end points for the rotor winding.As seen from the figure, six two mutually Y move 30 ° of stators and pay winding and two three-phase thyristor inverter bridge KCI, KCII connect in parallel, regulate the inversion angle α (anode group inverter bridge inverterangle is fixed altogether) of its common cathode group inverter bridge, the back-emf size of scalable rotor rectifier KZ dc terminal then, promptly changed the size of motor rotor back-emf, thereby regulated the size of rotor current I2, reached the purpose of speed governing, and the governor control characteristics of persevering torque.
Rotor current is sent six two mutually Y to through the inversion of rectifier bridge KZ output slip power and is moved 30 ° of stators and pay in the winding, participates in the motor power conversion, thereby has reduced the energy input of motor stator main winding, and reach purpose of energy saving.
Because six two mutually Y move 30 ° of stators and pay winding and have and eliminate 5 times, 7 times, the characteristic of harmonic wave, and 11 times, 13 subharmonic can be eliminated by winding " short distance than " β, therefore, slip energy significantly reduces the harmonic content of electrical network, thereby improve " harmonic pollution " of inverter greatly to electrical network, simultaneously since 5 times, 7 times, 11 times, 13 subharmonic in motor air gap magnetic field, eliminate, supplementary load loss when making the motor speed adjusting operation greatly reduce, system effectiveness further improves, and motor temperature descends.Because system adopts the vertical continuous or fork that improves power factor (PF) to trigger scheme mutually, can greatly reduce the compensation capacity of capacitor in addition.
Fig. 4 is that six two mutually Y move 30 ° of stators and pay winding and two three-phase crystalline substance lock inverter bridge KCI, KCII connect in series, and operation principle is substantially with the connect in parallel mode.
The utlity model has the double bridge invert function, need not contravariant transformer, can significantly reduce harmonic pollution and compensation capacity, improve speed efficiency and power factor.The utility model is simple in structure, and function admirable, cheap has the governor control characteristics of permanent torque, is specially adapted to the stepless speed regulation of the motor of blower fan, water pump.
Claims (3)
1, a kind of six two mutually Y move 30 ° of double bridge invert cascade adjustable-speed systems, comprise winding motors, doube bridge thyristor active inverter, rotor rectifier and trigger control device, it is characterized in that being equipped with six two mutually Y and move 30 ° of stators and pay winding in the groove of winding motors stator main winding, six two mutually Y move 30 ° of stators and pay winding and doube bridge thyristor inverter composition three-phase bridge two tunnel in parallel or connect in series.
2, governing system according to claim 1, β can be identical or inequality with " short distance compares " of stator main winding to it is characterized in that moving 30 ° of windings of paying windings " short distance than " by six two mutually Y.
3, governing system according to claim 1 is characterised in that altogether to trigger to control and adopts vertical continuous or fork triggering mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94246115 CN2243742Y (en) | 1994-11-22 | 1994-11-22 | Series speed regulating system with six phase and dual 30 deg. shift and dual bridge conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94246115 CN2243742Y (en) | 1994-11-22 | 1994-11-22 | Series speed regulating system with six phase and dual 30 deg. shift and dual bridge conversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2243742Y true CN2243742Y (en) | 1996-12-25 |
Family
ID=33851692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94246115 Expired - Fee Related CN2243742Y (en) | 1994-11-22 | 1994-11-22 | Series speed regulating system with six phase and dual 30 deg. shift and dual bridge conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2243742Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846404A (en) * | 2015-06-02 | 2015-08-19 | 李明科 | Circuit collector for electrolytic aluminium production line |
| CN109962538A (en) * | 2017-12-25 | 2019-07-02 | 安徽明腾永磁机电设备有限公司 | A kind of generator |
-
1994
- 1994-11-22 CN CN 94246115 patent/CN2243742Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846404A (en) * | 2015-06-02 | 2015-08-19 | 李明科 | Circuit collector for electrolytic aluminium production line |
| CN109962538A (en) * | 2017-12-25 | 2019-07-02 | 安徽明腾永磁机电设备有限公司 | A kind of generator |
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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 |