CN101882906A - Novel power circuit of high-voltage SRD (Step Recovery Diode) - Google Patents
Novel power circuit of high-voltage SRD (Step Recovery Diode) Download PDFInfo
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- CN101882906A CN101882906A CN2009102157139A CN200910215713A CN101882906A CN 101882906 A CN101882906 A CN 101882906A CN 2009102157139 A CN2009102157139 A CN 2009102157139A CN 200910215713 A CN200910215713 A CN 200910215713A CN 101882906 A CN101882906 A CN 101882906A
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Abstract
The invention relates to a novel power circuit suitable for a high-voltage SRD (Step Recovery Diode), which comprises a power unit serial circuit and a step-down transformer. The output ends of a plurality of independent power units are connected in series, a three-phase input end of each power unit and a secondary winding of the step-down transformer in delta connection are connected, and a three-phase bridge rectification element and a power electronic element in each power unit are both low-voltage elements. Primary windings of the step-down transformer are connected in a star shape, and the secondary winding comprises a plurality of mutually insulated independent windings in delta connection. The voltage of the secondary winding in delta connection is low and has a certain phase angle. The step-down transformer has three functions of voltage reduction, phase shift and isolation.
Description
Technical field
The present invention relates to electric drive and power electronic technology, be specifically related to a kind of novel power circuit.
Background technology
SRD (Switched Reluctance Drive is called for short SRD) is the 20th century novel Alternating Current Governor Systems that grow up of the mid-80.It is made of power circuit, driving and control circuit and switched reluctance motor (Switched ReluctanceMotor is called for short the SR motor), it has the advantage of asynchronous motor frequency-changing speed-regulating system and dc motor speed-regulating system concurrently, and the SR electric machine structure is simple, and is also simpler than common cage type asynchronous motor.It one domestic and international electrician's circle common concern occurs causing, over past ten years both at home and abroad in the mine, industrial circle extensive use such as communications and transportation, oil, lathe, aviation.But only limit to the application of low pressure (380V, 660V, 1140V) SRD at present both at home and abroad; And do not have the application of high pressure (6KV, 10KV) SRD, though many industrial departments are produced actual needs and are used high pressure SRD; But can make the power electronic element that withstand voltage is 6KV or 10KV because of going back neither one country in the world, also once had some to attempt solving the withstand voltage deficiency of single IGBT, but all pressures problem of each IGBT of series connection is difficult to overcome with a plurality of power electronic element IGBT series connection; Cause high pressure SRD in production reality, to fail to use.
Summary of the invention
The objective of the invention is to make up a kind of novel power circuit that (overlap joint) is applicable to high pressure SRD with the power electronic element (IGBT) that withstand voltage is not high in the common low pressure SRD power circuit; High pressure SRD is used in production reality.
For achieving the above object, the technical solution used in the present invention is as follows:
The novel power circuit of a kind of high pressure SRD, this circuit comprises power unit cascade circuit and step-down transformer, the first series connection of the output tail of a plurality of independent low pressure and low powers unit, the corner of prolonging of the three-phase input end of each power cell and step-down transformer connects secondary winding and connects, the secondary of step-down transformer independently prolongs the corner by a plurality of mutual insulatings and connects winding and constitute, and prolongs the secondary winding voltage that the corner connects and has certain phase angle mutually.
The novel power circuit of high pressure SRD of the present invention is made of core and slave part:
Core: the first series connection mutually of the output tail of a plurality of independent low pressure and low powers unit, the corner of prolonging of the three-phase input end of each power cell and step-down transformer connects secondary winding and connects, the three-phase bridge rectification element of each power cell and power electronic element IGBT all use common low voltage component.8 power unit cascades of accompanying drawing 1 (b) expression are powered to SR motor one phase winding.Same all the other two phase windings are respectively by other 8 power unit cascades power supply.
The slave part step-down transformer: one time the winding star connects, be connected to the high pressure three phase mains, secondary by a plurality of (8 to 24) mutual insulating, independently prolong the corner and connect winding and constitute, prolonging the secondary winding output voltage that the corner connects is low pressure, and prolongs the secondary winding voltage that the corner connects and have certain phase angle.Step-down transformer has step-down, phase shift, three kinds of effects of isolation.
The present invention has that circuit structure is simple, and power electronic element is few, and cost is low, and advantages such as reliable operation are suitable for high pressure SRD and apply in production reality.
Description of drawings
Fig. 1 is power cell of the present invention and series connection thereof;
Fig. 2 is a step-down transformer of the present invention;
Fig. 3 is the embodiment of the invention 1 wiring;
Fig. 4 is the embodiment of the invention 2 wiring;
Embodiment
Below by embodiment in addition accompanying drawing the present invention is described in detail.
As Fig. 1, Fig. 2, the novel power circuit of high pressure SRD of the present invention is made of core and slave part:
Core: the first series connection mutually of the output tail of a plurality of independent low pressure and low powers unit, the corner of prolonging of the three-phase input end of each power cell and step-down transformer connects secondary winding and connects, the three-phase bridge rectification element of each power cell and power electronic element IGBT all use common low voltage component.8 power unit cascades of accompanying drawing 1 (b) expression are powered to SR motor one phase winding.Same all the other two phase windings are respectively by other 8 power unit cascades power supply.
The slave part step-down transformer: one time the winding star connects, be connected to the high pressure three phase mains, secondary by a plurality of (8 to 24) mutual insulating, independently prolong the corner and connect winding and constitute, prolonging the secondary winding output voltage that the corner connects is low pressure, and prolongs the secondary winding voltage that the corner connects and have certain phase angle.Step-down transformer has step-down, phase shift, three kinds of effects of isolation.
3 set forth specific embodiments of the invention 1 in conjunction with the accompanying drawings: step-down transformer once connects the high pressure three phase mains, 24 of step-down transformer secondaries prolong the corner connect winding respectively with (A
1A
8), (B
1B
8) (C
1C
8) 24 power cell three-phase input ends connect.(A
1A
8) voltage after the first series connection of output tail of 8 power cells of signal is added on SR motor A phase winding L
ABe added on the B phase winding L of SR motor behind 8 power unit cascades of same all the other two-phases respectively
BWith C phase winding L
CIf a sub-high pressure is 6KV (10KV), secondary prolongs the corner and connects winding voltage and reduce to 530V (890V), after three-phase bridge rectification filtering, VD be 750V (1250V) again through power electronic element IGBT pulse-width modulation, the output voltage of each power cell is 0 to 750V (0 to 1250V) adjustable voltage; Obtain 0 to 6KV (0 to 10KV) adjustable voltage power supply high voltage SR motor behind 8 power unit cascades, so just regulated the SR motor speed.
4 set forth specific embodiments of the invention 2 in conjunction with the accompanying drawings: step-down transformer once connects the high pressure three phase mains, transformer secondary is only established 8 and is prolonged the corner and connect winding, the three-phase input end of 8 power cells prolongs the corner and connects three phase windings and connect with 8, to SR motor A phase, B mutually and the IGBT of C phase winding power supply all be connected in parallel on same three-phase bridge rectification filter circuit DC side.Prolong the corner and connect winding voltage and reduce to 530V (890V) if a sub-high pressure is 6KV (10KV) secondary; The same with embodiment 1, the voltage that is added on SR motor three phase windings is 0 to 6KV (0 to 10KV) adjustable voltage, has so also regulated the SR motor speed.
Embodiment 2 winding diagrams and embodiment 1 winding diagram compare, and its advantage is that the secondary winding number of step-down transformer is reduced to 8 by 24, and outlet is reduced to 24 by 72; The rectifying and wave-filtering element also reduces simultaneously, be step-down transformer primary side harmonic pollution electrical network but bring shortcoming, and power factor is lower.
Though two embodiment are described in detail and illustrate that the present invention is not limited thereto.Should know that those skilled in the art can carry out numerous modifications and variations under the condition that does not deviate from spirit of the present invention and principle, and not break away from it by protection range that claims limited.
Explanation around here, the SR motor among the high pressure SRD is identical with SR electric machine structure among the low pressure SRD, no special character, the factory of the high-voltage asynchronous motor of every energy production all can make high pressure SR motor.Driving among the high pressure SRD is identical with driving and control circuit among control circuit and the low pressure SRD.
More than to one embodiment of the present of invention be elaborated but described content only for preferred embodiment of the present invention, can not be considered to be used to limit practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., all should belong within the patent covering scope of the present invention.
Claims (1)
1. the novel power circuit of a high pressure SRD, it is characterized in that, this circuit comprises power unit cascade circuit and step-down transformer, the first series connection of the output tail of a plurality of independent low pressure and low powers unit, the corner of prolonging of the three-phase input end of each power cell and step-down transformer connects secondary winding and connects, the secondary of step-down transformer independently prolongs the corner by a plurality of mutual insulatings and connects winding and constitute, and prolongs the secondary winding voltage that the corner connects and has certain phase angle mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102157139A CN101882906A (en) | 2009-12-30 | 2009-12-30 | Novel power circuit of high-voltage SRD (Step Recovery Diode) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102157139A CN101882906A (en) | 2009-12-30 | 2009-12-30 | Novel power circuit of high-voltage SRD (Step Recovery Diode) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101882906A true CN101882906A (en) | 2010-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102157139A Pending CN101882906A (en) | 2009-12-30 | 2009-12-30 | Novel power circuit of high-voltage SRD (Step Recovery Diode) |
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| CN (1) | CN101882906A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29701914U1 (en) * | 1997-02-04 | 1997-04-17 | Siemens AG, 80333 München | Circuit arrangement for direct conversion of electrical energy |
| CN2341319Y (en) * | 1998-09-09 | 1999-09-29 | 北京重型电机厂 | Rectifying conversion speed regulator fed by phase-shift transformer |
| CN1889350A (en) * | 2006-07-12 | 2007-01-03 | 哈尔滨九洲电气股份有限公司 | Frequency transformer capable of continuously operating during power-off |
| CN101499757A (en) * | 2008-02-02 | 2009-08-05 | 北京中纺锐力机电有限公司 | Novel speed regulating apparatus for 3 phase high voltage switch reluctance motor |
-
2009
- 2009-12-30 CN CN2009102157139A patent/CN101882906A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29701914U1 (en) * | 1997-02-04 | 1997-04-17 | Siemens AG, 80333 München | Circuit arrangement for direct conversion of electrical energy |
| CN2341319Y (en) * | 1998-09-09 | 1999-09-29 | 北京重型电机厂 | Rectifying conversion speed regulator fed by phase-shift transformer |
| CN1889350A (en) * | 2006-07-12 | 2007-01-03 | 哈尔滨九洲电气股份有限公司 | Frequency transformer capable of continuously operating during power-off |
| CN101499757A (en) * | 2008-02-02 | 2009-08-05 | 北京中纺锐力机电有限公司 | Novel speed regulating apparatus for 3 phase high voltage switch reluctance motor |
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| ASS | Succession or assignment of patent right |
Owner name: MENG RUNQUAN Free format text: FORMER OWNER: WANG ZHENMIN Effective date: 20130201 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Meng Runquan Inventor after: Wang Yang Inventor after: Chen Juan Inventor before: Wang Zhenmin Inventor before: Meng Runquan |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG ZHENMIN MENG RUNQUAN TO: MENG RUNQUAN WANG YANG CHEN JUAN |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20130201 Address after: 030024 School of electrical and power engineering, Taiyuan University of Technology, Shanxi Applicant after: Meng Runquan Address before: 030024 No. 53 West Mining street, Wan Berlin District, Shanxi, Taiyuan Applicant before: Wang Zhenmin |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101110 |