CN202855476U - High frequency filtering inductance used for auxiliary power supply converter system of high-speed locomotive - Google Patents
High frequency filtering inductance used for auxiliary power supply converter system of high-speed locomotive Download PDFInfo
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- CN202855476U CN202855476U CN 201220573970 CN201220573970U CN202855476U CN 202855476 U CN202855476 U CN 202855476U CN 201220573970 CN201220573970 CN 201220573970 CN 201220573970 U CN201220573970 U CN 201220573970U CN 202855476 U CN202855476 U CN 202855476U
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- supply converter
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Abstract
The utility model discloses a high frequency filtering inductance used for an auxiliary power supply converter system of a high-speed locomotive. The high frequency filtering inductance used for the auxiliary power supply converter system of the high-speed locomotive comprises a magnetic tank, a coil, an insulation end ring, a lead and potting compound. The magnetic tank is a sectional type magnetic tank and is made from high flux cores of special ferroalloy powder metallurgy which has high energy storage and low loss characteristics. The coil is winded by the copper strap wires which are high temperature-resistant and covered by lacquer. The coil is an organic cylinder type coil with a plurality of even winding layers. Leads of head end and tail end of the coil are led out adjacently. The insulation end ring is made from engineering plastics which is high temperature-resistant. The potting compound is made from polyurethane pouring sealant which is high temperature-resistant and elastic. The high frequency filtering inductance used for the auxiliary power supply converter system of the high-speed locomotive has the characteristics of electric apparatus of being non-electromagnetic interference, low in noise, low in loss, low in temperature rise, nonlinear in inductance, and small in size and the like. Efficiency and reliability of the auxiliary power supply converter system of the high-speed locomotive can be improved.
Description
Technical field
The utility model belongs to the special transformer field, relates to a kind of filter inductance particular design of (also claiming filter reactor), specifically a kind of High frequency filter inductance for high ferro locomotive accessory power supply converter system.
Background technology
Electric Locomotive Auxiliary System is the important component part of electric locomotive, mainly comprises the parts such as accessory power supply, stand-by motor and corresponding control circuit.Secondary power system is the important component part of locomotive, undertaking the power supply task of various devices except the locomotive traction system main circuit, provide the three-phase alternating-current supply of the auxiliary motor such as air compressor, air-conditioning, ventilation blower of wind regime, the power supply of electric heater, refrigerator, information display device etc.
The accessory power supply converter system of current main flow take Bombadier Inc as representative adopts the main circuit form of single-phase bridge four-quadrant rectification+two level three-phase bridge type inverses.Obtain single phase alternating current (A.C.) voltage from the auxiliary winding of traction transformer of locomotive, be converted to the Constant Direct Current power supply through four-quadrant rectifier, and carry out energy storage by Support Capacitor, then by inverter the Constant Direct Current power supply is converted to the three-phase PWM alternating current, provides the three phase sine alternating voltage by the LC filter for vehicle assistant load again.At input, Support Capacitor end and output configuration voltages transducer, realize supervision and protection to input voltage, middle dc voltage and three-phase output voltage; Input and inverter module output configuration current sensor are realized supervision and protection to input current and output current.
PWM (pulse-width modulation) controls output voltage by changing pulse duration, controls its output frequency by the change cycle.And the variation of output frequency can realize by the modulation period that changes this pulse.Like this, two effects of pressure regulation and frequency modulation are cooperated consistent, and irrelevant in the intermediate dc link, thereby accelerated governing speed, improved dynamic property.Because the output constant amplitude pulse only needs the power supply of Constant Direct Current power supply, available uncontrollable rectifier replaces phase controlled rectifier, and the power factor of grid side is improved greatly.Utilize the PWM inverter can suppress or eliminate low-order harmonic.Add the use self-turn-off device, switching frequency increases substantially, and output waveform can approach sinusoidal wave very much.Therefore, PWM (pulse-width modulation) technology has obtained in fields such as high ferro power converter, photovoltaic DC-to-AC converter, wind electric converters to use more and more widely.
Because the PWM ac power waveform contains many high-frequency harmonic components inevitably, for reducing high-frequency harmonic to the adverse effect of auxiliary motor, adding filter at the output of inverter---the LC filter is essential.The LC filter (is also claimed: filter reactor) form by filter capacitor and filter inductance.
In the fields such as photovoltaic DC-to-AC converter, wind electric converter, the filter inductance that is used for the filtering high-frequency harmonic adopts reactor with T-shaped core usually, and is all like this such as the filter inductance that is widely used in now the 500kW photovoltaic DC-to-AC converter.
But at the converter system of high ferro locomotive accessory power supply, there is intrinsic defective in iron core reactor as filter inductance.
One, iron core reactor adopts the core structure with air gap, obtains the inductance value that needs by the adjusting gas length; This structure will produce corresponding stray field because iron core is cut off by air gap at the air gap place; In addition, the coil of open type is inevitable also will produce stray field; These two stray fields must to arround electromagnetic environment exert an influence, thereby have influence on control system and the communication system of locomotive.Insurmountable electromagnetic interference (being commonly called as EMI:Electro Magnetic Interference) problem when reactor with T-shaped core is applied to high ferro electrical locomotive power system as filter inductance that Here it is.
Its two, the noise of iron core reactor is because the existence of air gap is larger, according to amount of capacity, usually about 70 decibels.
They are three years old, iron core reactor under the effect of high-frequency harmonic, square being directly proportional of core loss and frequency, the core loss that high-frequency harmonic causes in silicon steel sheet will reach the several times of first-harmonic core loss, be a numerical value of can not ignore, this will significantly reduce the efficient of power-supply system.
Its four, the inductance value of iron core reactor is under different electric currents, it is invariable that its inductance value almost keeps, this misfits for the non-linear requirement of filter inductance for the high ferro locomotive auxiliary converter.
Its five, the temperature rise of iron core reactor is higher, usually iron core and coil with respect to the temperature rise of environment between 80-100K, other electric components around this is unfavorable for, especially inner at the relatively poor locomotive of relative radiating condition.
Its six, the volume of iron core reactor is larger, secondary power system of limited space is disadvantageous for being installed on the locomotive bottom for this.
They are seven years old, reactor with T-shaped core is unenclosed construction, iron core and coil all are exposed in the environment, and the fastening stretching screw that depends on of its iron core, outdoor operation, environment are abominable, vibrations locomotive operation environment endlessly is acid test for the electric and mechanical stability of reactor and be in for a long time.
Amid all these factors, to be applied to high ferro locomotive accessory power supply converter system as filter inductance be inappropriate to reactor with T-shaped core.Therefore, be necessary to research and develop a kind of novel filter inductance that can effectively remedy defects, it should have without electromagnetic interference, low noise, low-loss, low-temperature-rise, the electricapparatus characteristic such as inductance value is non-linear, volume is little, thereby is applicable to the converter system of high ferro locomotive accessory power supply fully.This is for ensureing that high ferro electrical locomotive power Systems balanth and reliability have the effect of can not ignore.
The utility model content
The purpose of this utility model provides a kind of High frequency filter inductance that has without electromagnetic interference, low noise, low-loss, low-temperature-rise, the electricapparatus characteristic such as inductance value is non-linear, volume is little.
The technical solution of the utility model is, a kind of High frequency filter inductance for high ferro locomotive accessory power supply converter system, comprise magnetic tank, coil, insulating end ring, lead-in wire, potting compound, its improvement is: described magnetic tank is segmented magnetic tank, is made by the powder core of the particular iron alloy powder metallurgy that possesses high energy storage, low loss characteristic; Be divided into three stage structure or two-part structure according to the inductive capacity size, wherein three stage structure is divided into epimere, stage casing and hypomere, and the two-part structure is divided into epimere and hypomere.Epimere and hypomere magnetic tank have square outlet notch.
Described coil adopts the coiling of heat resistance paint wire copper-clad flat line to form, and its structure is integrated the multilayer-wound cylindrical layer winding, and the number of plies is even number.
The head end tap lead wire of described coil is adjacent with terminal tap lead wire draws.
Described insulating end ring adopts thermostability engineering plastic to make.
Described potting compound employing is high temperature resistant, have flexible polyurethane pouring sealant concurrently.
The beneficial effects of the utility model are:
Adopt segmentation magnetic tank as the flux path of inductance (replacing traditional iron core that is formed by the electrical steel sheet stack), after mounting coil enters the cavity of magnetic tank, with whole embedding after the segmentation magnetic tank bonding, there is not air gap between the segmentation magnetic tank, and the stray field of coil is closed in the magnetic tank, has properly solved with the intrinsic electromagnetic interference problem of the conventional iron core reactor of air gap;
The powder core magnetic tank that adopts high energy storage, low-loss particular iron alloy powder metallurgy to make can effectively reduce the inductance finished-product volume; Especially the specific loss of ferroalloy magnetic under high frequency is far below common electrical steel sheet, and then the inductor core loss under first-harmonic and the comprehensive function of high-frequency harmonic electric current greatly reduces, and has significantly reduced temperature rise; And because the magnetostriction of magnetic close to zero, will make inductance substantially realize quiet.
Utilize the saturated magnetic characteristic of particular iron alloy magnetic powder core magnetic tank, realized the non-linearization of inductance value.
Adopt one multilayer-wound (even level) cylindrical coil structure, the first and last of coil brings out adjacent the drawing of head lead-in wire, because current opposite in direction, farthest realize without electromagnetic interference close to cancelling out each other in the magnetic field of its generation.
Adopt good, the elastic polyurethane filling material of thermal conductivity, magnetic tank and coil are condensed into whole in, the heat that the coil that is closed in inside can be distributed in time is transmitted to magnetic tank shell surface radiating, and certain deformation space can be provided for the thermal expansion of coil, ensure reliably mechanical stability and the thermal stability of inductance.
Description of drawings
Fig. 1 is the structural representation of the High frequency filter inductance for high ferro locomotive accessory power supply converter system described in the utility model.
Fig. 2 is the loop construction schematic diagram of the High frequency filter inductance for high ferro locomotive accessory power supply converter system described in the utility model.
Embodiment
Below contrast accompanying drawing, by the description of embodiment, the utility model made further specifying.
As shown in Figure 1, a kind of High frequency filter inductance for high ferro locomotive accessory power supply converter system comprises magnetic tank 1, coil 2, insulating end ring 3, lead-in wire 4, potting compound 5.
Described magnetic tank 1 adopts the powder core of high energy storage, low-loss particular iron alloy powder metallurgy to make; Be divided into three stage structure or two-part structure according to the inductive capacity size, wherein three stage structure is divided into epimere, stage casing and hypomere, and the two-part structure is divided into epimere and hypomere.Epimere and hypomere magnetic tank have square outlet notch; Figure 1 shows that three stage structure, as shown in the figure, magnetic tank 1 is made of shell tank body and center pillar magnetic core, and both consist of the flux path of inductance.
Described coil 2 adopts resistant to elevated temperatures enameling copper strap wire coiling to form, and its structure is integrated the multilayer-wound cylindrical layer winding, and the number of plies is even number, as shown in Figure 2.The concrete number of plies can be calculated and determine according to amount of capacity, the number of turn of coil, the magnetic tank cavity volume of inductance.The external diameter of coil should be designed to less than magnetic tank internal diameter number millimeter, so that insulation isolation and potting compound filling.An exemplifying embodiment shown in Figure 2 is 4 layers.
Described insulating end ring 3 adopts thermostability engineering plastic to make, and is sleeved on the center pillar magnetic core of magnetic tank, plays the insulating effect of effective retarder and magnetic tank.For the arts demand of coil assembling, insulating end ring is usually also cut apart and is made up and down two parts.
Described lead-in wire 4 is comprised of head end tap lead wire 4-1 and the terminal tap lead wire 4-2 of coil; Because the number of plies of coil 2 is even number, then the head end tap lead wire 4-1 of coil and terminal tap lead wire 4-2 draw adjacent behind its insulating wrapping side by side in the same side outlet.
Described potting compound 5 adopts good, the elastic polyurethane filling material of thermal conductivity.
The utility model implementation process is as follows:
Insulating end ring 3 is sleeved on the center pillar magnetic core of magnetic tank 1 first, coil 2 then is installed, need the square outlet notch with lead-in wire 4 aligned magnetic tanks 1 during installation, then cover the not construction section of magnetic tank 1; Again with suitable clamp magnetic tank, can by another section that does not contain tap lead wire of magnetic tank 1 with notch potting compound 5 injected implement embeddings.The complete rear drying cooling of embedding gets final product to get High frequency filter inductance described in the utility model.
Claims (4)
1. High frequency filter inductance that is used for high ferro locomotive accessory power supply converter system, comprise magnetic tank (1), coil (2), insulating end ring (3), lead-in wire (4) and potting compound (5), it is characterized in that: described magnetic tank (1) is segmented magnetic tank, is made by the powder core of the particular iron alloy powder metallurgy that possesses high energy storage, low loss characteristic.
2. the High frequency filter inductance for high ferro locomotive accessory power supply converter system according to claim 1, it is characterized in that: described coil (2) adopts the coiling of heat resistance paint wire copper-clad flat line to form, its structure is integrated the multilayer-wound cylindrical layer winding, and the number of plies is even number.
3. the High frequency filter inductance for high ferro locomotive accessory power supply converter system according to claim 1 is characterized in that: the head end tap lead wire (4-1) of coil (2) and adjacent the drawing of terminal tap lead wire (4-2).
4. the High frequency filter inductance for high ferro locomotive accessory power supply converter system according to claim 1 is characterized in that: potting compound (5) adopt high temperature resistant, have flexible polyurethane pouring sealant concurrently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220573970 CN202855476U (en) | 2012-10-29 | 2012-10-29 | High frequency filtering inductance used for auxiliary power supply converter system of high-speed locomotive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220573970 CN202855476U (en) | 2012-10-29 | 2012-10-29 | High frequency filtering inductance used for auxiliary power supply converter system of high-speed locomotive |
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| CN202855476U true CN202855476U (en) | 2013-04-03 |
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| CN 201220573970 Expired - Fee Related CN202855476U (en) | 2012-10-29 | 2012-10-29 | High frequency filtering inductance used for auxiliary power supply converter system of high-speed locomotive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794332A (en) * | 2012-10-29 | 2014-05-14 | 江苏正强电气有限公司 | High-frequency filter inductor for auxiliary power converter system of electric locomotive |
-
2012
- 2012-10-29 CN CN 201220573970 patent/CN202855476U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794332A (en) * | 2012-10-29 | 2014-05-14 | 江苏正强电气有限公司 | High-frequency filter inductor for auxiliary power converter system of electric locomotive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU ZHENGHUI SOLAR CO., LTD. Free format text: FORMER OWNER: JIANGSU ZHENGQIANG ELECTRIC CO., LTD. Effective date: 20140603 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 213125 CHANGZHOU, JIANGSU PROVINCE TO: 210000 CHANGZHOU, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140603 Address after: 210000 No. 18 strong road, Xinbei District, Jiangsu, Changzhou Patentee after: Jiangsu Zhenghui Solar Co., Ltd. Address before: 213125 Jiangsu province Changzhou Fengxiang Road, new North Xuejiadao Industrial Park No. 1 Patentee before: Jiangsu ZhengQiang Electric Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20191029 |