CN101202524A - High-power multi-electric machine shaft coupling velocity modulation system - Google Patents
High-power multi-electric machine shaft coupling velocity modulation system Download PDFInfo
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- CN101202524A CN101202524A CNA200610119577XA CN200610119577A CN101202524A CN 101202524 A CN101202524 A CN 101202524A CN A200610119577X A CNA200610119577X A CN A200610119577XA CN 200610119577 A CN200610119577 A CN 200610119577A CN 101202524 A CN101202524 A CN 101202524A
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Abstract
The invention provides a large power multi-motor coupling speed regulation system, comprising a plurality of operation control platforms which are connected sequentially, a given integrator, a plurality of comparers, a speed regulator, a current regulator, a pulse triggering device, a full-control rectifier circuit and a plurality of units. The units adopt parallel structures; each unit comprises a synchronous generator and two DC generators which are coaxially connected with the two ends of the synchronous generator; the DC motors are respectively connected with two full-control bridges in series; a current feedback circuit of each unit is provided with a current feedback device; the system also comprises a speed external ring compensation device which is used for slight modulation; an isolation device is connected between the operation control platform and the given integrator. The invention provides the large power multi-motor coupling speed regulating system which can provide large power and simultaneously has the advantages of safety and reliability, high precision, and strong anti-interference capability.
Description
Technical field
The present invention relates to a kind of multi-electric machine shaft coupling velocity modulation system, relate in particular to a kind of high-power multi-electric machine shaft coupling velocity modulation system.
Technical background
Along with the progress of science and technology, in many electric drive tests system, the power that often needs to provide very big drags the various rotating speed operating modes that test product reaches test request, by test macro test product is tested again.In existing technology, the general mode of many motors shaft coupling speed governing of using provides big power, traditional speed outer shroud, the twin nuclei of current inner loop have been adopted, this mode exists following problem: 1) be difficult to provide very big power, 2) because the series connection form is adopted in the loop, so voltage is very high, fail safe is bad, and 3) this traditional current inner loop, the structure of speed outer shroud, precision is not high, 4) because whole system device distribution area is bigger, the silicon controlled power ratio is bigger simultaneously, and the interference of electromagnetic field is serious, poor anti jamming capability also can influence the precision of system.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of high-power multi-electric machine shaft coupling velocity modulation system is provided, it can provide bigger power, simultaneously, also have safe and reliable, precision is high, the characteristics that antijamming capability is strong.
The technical scheme that realizes above-mentioned purpose is: a kind of high-power multi-electric machine shaft coupling velocity modulation system, comprise the some operating consoles that connect successively, reference integrator, some comparators, speed regulator, current regulator, pulse triggering means, fully controlled bridge rectification circuit and some cover units, and feedback loop is provided with a current feedback unit and a speed feedback device, wherein, described some cover units adopt parallel-connection structure, every cover unit comprises a synchronous generator, two coaxial DC generator that connect in the two ends with synchronous generator, they form the frequency conversion unit, these two DC motor are intersected with two fully controlled bridges respectively and are connected, be provided with the current feedback unit of a reflection fully controlled bridge electric current on the current feedback loop of every cover unit, this electric current is compared with the electric current set-point of speed regulator output and is equated with the electric current that guarantees every cover unit.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system wherein, also comprises a speed outer shroud compensation arrangement, and it is folded mutually with fine setting with the difference and the set-point of synchronous generator rotating speed with high-speed motor.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system, wherein, described speed outer shroud compensation arrangement is a Digital Speed Testing compensation arrangement.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system, wherein, described two fully controlled bridges are △ bridge thyristor for one group, one group is Y bridge thyristor.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system, wherein, described pulse triggering means respectively is a pulse phase shift distributor, it is that 30 trigger impulses of spending trigger two fully controlled bridges respectively that six phase trigger impulses are become two groups of phase differences.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system, wherein, described pulse phase shift distributor also can be used for 24 pulse wave rectifier circuit.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system, wherein, described speed feedback device is a Digital Speed Testing feedback device.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system wherein, also comprises a spacer assembly, and it is connected between some operating consoles and the reference integrator.
Above-mentioned a kind of high-power multi-electric machine shaft coupling velocity modulation system, wherein, described some operating consoles comprise some experimental benches, central control desk and this cabinet.
The invention has the beneficial effects as follows: a kind of high-power multi-electric machine shaft coupling velocity modulation system of the present invention, it has adopted a speed ring, the structure of a plurality of parallel-current rings, therefore can provide bigger power, use fully controlled bridge and motor simultaneously and intersect this structure of connecting, reduced the voltage of any point to point on the loop, the fail safe of raising system, this governing system also is provided with the outer shroud compensation arrangement, in order to finely tune, and the slippage of compensation asynchronous machine, improved precision greatly, the spacer assembly between operating console and the reference integrator has improved the antijamming capability of system greatly.Therefore, two DC motor are powered by fully controlled bridge in conjunction with above technology, drag synchronous generator rotation, the excitation of control synchronous generator is the voltage of may command synchronous generator output, keeps V/f to equal the requirement of constant when satisfying the high-speed motor frequency control.
Description of drawings
Fig. 1 is the system construction drawing of a kind of high-power multi-electric machine shaft coupling velocity modulation system of the present invention.
Embodiment
Below in conjunction with accompanying drawing a kind of high-power multi-electric machine shaft coupling velocity modulation system of the present invention is described further.
See also Fig. 1, a kind of high-power multi-electric machine shaft coupling velocity modulation system of the present invention comprises the operating console 1 that connects successively, spacer assembly 2, reference integrator 3, speed regulator 5, current regulator 71 and 72, pulse triggering means 8, fully controlled bridge rectification circuit 91 and 92, two covers unit in parallel, comparator 41,42,43, it on the speed feedback loop Digital Speed Testing feedback device 10, be respectively arranged with the current feedback unit 61 and 62 of a reflection fully controlled bridge electric current on the current feedback loop of this two covers unit, this electric current is compared with the electric current set-point of speed regulator 5 outputs and is equated with the electric current that guarantees every cover unit, and also comprise a speed outer shroud compensation arrangement 11, wherein:
Spacer assembly 2 adopts Low ESR to add the way of isolation, makes the signal transmission between central control desk, experimental bench and this cabinet have no to disturb, and makes the demonstration of numerical indicating instrument everywhere (given actual speed, V/f ratio etc.) in full accord;
The input of reference integrator 3 connects spacer assembly 2, and output connects comparator 41 and after the computing result exported so that input signal is carried out;
It is △ bridge thyristor as 91,92, one groups of the first and second fully controlled bridge rectification circuits that fully controlled bridge rectification circuit on every cover unit major loop adopts two groups of fully controlled bridges, and one group is Y bridge thyristor;
Pulse triggering means 8 respectively is a pulse phase shift distributor, and it is that 30 trigger impulses of spending trigger two groups of fully controlled bridges respectively that six phase trigger impulses are become two groups of phase differences, and this pulse phase shift distributor also can be used for 24 pulse wave rectifier circuit;
Every cover unit comprises a synchronous generator, two coaxial DC generator that connect in the two ends with synchronous generator, they form the frequency conversion unit, these two DC motor are intersected with two fully controlled bridges respectively and are connected to reduce on the loop voltage of point to point arbitrarily, the fail safe of raising system, and finished the 12 pulsating wave power supply circuits;
Be in series with comparator 42 and speed regulator 5 between comparator 41 and comparator 43, Digital Speed Testing feedback device 10 can carry out exporting to speed regulator 5 after the computing with the speed feedback of the synchronous generator G1 that measures or G2 to comparator 42;
First current feedback unit 61 is connected on the comparator 43 of the first fully controlled bridge rectification circuit 91 and first current regulator, 71 inputs, constitutes current feedback; Second current feedback unit 62 is connected on the comparator 44 of the second fully controlled bridge rectification circuit 92 and second current regulator, 72 inputs;
Speed outer shroud compensation arrangement 11 is a Digital Speed Testing compensation arrangement, it is folded mutually with fine setting by the comparator 41 that is attached thereto with the difference and the set-point of synchronous generator G1 or G2 rotational speed N 1 with the rotational speed N 3 of the high-speed motor M I that measures or M II, reaches the purpose of high accuracy speed stabilizing.
Operation principle of the present invention: the coaxial connection of multiple-motor drags load operation, and exerting oneself of each motor will equate that the principle that the present invention adopts each current of electric to equate guarantees that moment equates, so equate owing to coaxial connection rotating speed equates power.Therefore in a cover unit, adopt the way of unit series connection to reach to exert oneself equal; For the structure of a speed ring multiple current ring of two cover units employings,, make that then two cover unit outputs are equal as long as two the same two cover unit current value sound attitudes that guarantee with response of current ring parameters are consistent.
Test specimen is dragged by intermediate frequency motor M I and M II shaft coupling in the present embodiment; M I, M II are 4000 kilowatts of high speed intermediate frequency motor, so maximum power draw is 8000 kilowatts.Every intermediate frequency motor power is all supplied with by 5000 kilowatts of synchronous generator unit.The frequency conversion unit is respectively formed with 1 coaxial connection of 2800 kilowatts of DC motor in 5000 kilowatts of synchronous generator two ends, by thyristor installation two DC motor are powered, drag the synchronous generator rotation, thereby the rotating speed that changes generator can change the frequency of high-speed motor power supply reaches the purpose that changes the high-speed motor rotating speed, the excitation of control synchronous generator is the voltage of may command synchronous generator output, keeps V/f to equal the requirement of constant when satisfying the high-speed motor frequency control.
Above embodiment only supplies explanation the present invention's usefulness, and is not limiting the scope of the invention.Relevant those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can also make various conversion or modification, and the technical scheme that all are equal to should belong to also within the category of the present invention's protection, is limited by appended claim.
Claims (9)
1. high-power multi-electric machine shaft coupling velocity modulation system, comprise the some operating consoles that connect successively, reference integrator, some comparators, speed regulator, current regulator, pulse triggering means, fully controlled bridge rectification circuit and some cover units, and feedback loop is provided with a current feedback unit and a speed feedback device, it is characterized in that: described some cover units adopt parallel-connection structure, every cover unit comprises a synchronous generator, two coaxial DC generator that connect in the two ends with synchronous generator, they form the frequency conversion unit, these two DC motor are intersected with two fully controlled bridges respectively and are connected, be provided with the current feedback unit of a reflection fully controlled bridge electric current on the current feedback loop of every cover unit, this electric current is compared with the electric current set-point of speed regulator output and is equated with the electric current that guarantees every cover unit.
2. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 1 is characterized in that: also comprise a speed outer shroud compensation arrangement, it is folded mutually with fine setting with the difference and the set-point of synchronous generator rotating speed with high-speed motor.
3. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 2 is characterized in that: described speed outer shroud compensation arrangement is a Digital Speed Testing compensation arrangement.
4. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 1 is characterized in that: described two fully controlled bridges are △ bridge thyristor for one group, and one group is Y bridge thyristor.
5. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 1, it is characterized in that: described pulse triggering means respectively is a pulse phase shift distributor, and it is that 30 trigger impulses of spending trigger two fully controlled bridges respectively that six phase trigger impulses are become two groups of phase differences.
6. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 4 is characterized in that: described pulse phase shift distributor also can be used for 24 pulse wave rectifier circuit.
7. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 1 is characterized in that: described speed feedback device is a Digital Speed Testing feedback device.
8. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 1 is characterized in that: also comprise a spacer assembly, it is connected between some operating consoles and the reference integrator.
9. a kind of high-power multi-electric machine shaft coupling velocity modulation system according to claim 1 is characterized in that: described some operating consoles comprise some experimental benches, central control desk and this cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610119577XA CN101202524A (en) | 2006-12-13 | 2006-12-13 | High-power multi-electric machine shaft coupling velocity modulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200610119577XA CN101202524A (en) | 2006-12-13 | 2006-12-13 | High-power multi-electric machine shaft coupling velocity modulation system |
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| CN101202524A true CN101202524A (en) | 2008-06-18 |
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| CNA200610119577XA Pending CN101202524A (en) | 2006-12-13 | 2006-12-13 | High-power multi-electric machine shaft coupling velocity modulation system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320023A (en) * | 2014-09-16 | 2015-01-28 | 安徽久能信息科技有限公司 | Motor drive detection method |
| CN106787971A (en) * | 2017-04-01 | 2017-05-31 | 常州寻心电子科技有限公司 | A kind of bi-motor cooperative control system and method |
| WO2023236855A1 (en) * | 2022-06-07 | 2023-12-14 | 上海能传电气有限公司 | Control circuit for realizing power balance of a plurality of synchronous motors and control method therefor |
-
2006
- 2006-12-13 CN CNA200610119577XA patent/CN101202524A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104320023A (en) * | 2014-09-16 | 2015-01-28 | 安徽久能信息科技有限公司 | Motor drive detection method |
| CN106787971A (en) * | 2017-04-01 | 2017-05-31 | 常州寻心电子科技有限公司 | A kind of bi-motor cooperative control system and method |
| WO2023236855A1 (en) * | 2022-06-07 | 2023-12-14 | 上海能传电气有限公司 | Control circuit for realizing power balance of a plurality of synchronous motors and control method therefor |
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Open date: 20080618 |