CN2524425Y

CN2524425Y - Flexible starter for magnetic control motor with foil style windings

Info

Publication number: CN2524425Y
Application number: CN 02224522
Authority: CN
Inventors: 胡琪顺; 王群
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-06
Filing date: 2002-02-06
Publication date: 2002-12-04
Anticipated expiration: 2012-02-06

Abstract

The utility model relates to a flexible starter for magnetic control motor with foil type windings aiming to restrain impact of skin effect, shrink volume, reduce loss and improve quality. Structure of the utility model comprises a magnetic amplifier, a core of which consists of a DC winding and an AC winding. In the AC winding, a winding framework is wrapped with an insulating layer and corresponding copper foil with a thickness of 0.01 to 0.3mm. The utility model has the advantages of good space utilization, volume reducing, effective lightening of impact of skin effect, easy assembly of windings and improvement of comprehensive quality.

Description

The magnet controlled motor soft starter of paper tinsel formula winding

The utility model relates to Soft Starter of Induction Motor, is the magnetic-control soft starter of new generation that refers to that specially employing paper tinsel formula material manufactures and designs.

The core technology of magnet controlled asynchronous machine soft starter is " the dedicated magnetic amplifier " of starting performance element, and it is made of iron core, AC Windings, DC control winding three-major-items.Because characteristics such as to have anti-overload ability strong for it, and the output wave mode is good and being approved, but also exposing the some shortcomings part in the application widely by users; Distinct issues are that comparison heaviness, volume and temperature rise are also bigger, especially 90KW above in the magnetic amplifier of big moving rate show more outstandingly, the advantage of comparing with autotransformer starter aspect above-mentioned is unsatisfactory.Its principal contradiction concentrates on the AC Windings, as everyone knows, alternating current will produce " skin effect " by conductor the time, and it is relevant with the thickness of the frequency of alternating current and lead, the origin cause of formation of skin effect be lead under the effect of AC magnetic field, cause that at the inner eddy current that forms of lead it makes electric current increase and the trend Surface runoff at the resistance of lead internal flow, so just cause the current capacity of lead to descend, loss increases.The 49th page of introduction of " newly organized transformer practical technique question and answer " book according to the 2nd edition Liaoning science tech publishing house publication in January calendar year 2001: lead " thickness doubles, and eddy current loss increases by four times ".For guaranteeing trouble free service under big electric current, the method that adopts usually: the one, increase the sectional area of lead, the 2nd, adopts many lines and wind with the enhancing current capacity.But take its result of the sort of scheme all to cause the occupancy of window unshakable in one's determination to increase, corresponding specification unshakable in one's determination also will strengthen, and volume, weight, difficulty of processing all increase.The basic reason of above-mentioned weak point that Here it is.

Scheme of the present utility model is by improving the AC Windings structure of magnetic amplifier, reach the influence that suppresses skin effect, further reduced volume, weight reduction, minimizing loss, the purpose of raising product comprehensive quality.

Technical solution of the present utility model is as follows:

The magnet controlled motor soft starter of paper tinsel formula winding, by being wound with direct current winding (2) on the iron core (1) and AC Windings (3) is formed magnetic amplifier in the soft starter, it is characterized in that: in the AC Windings (3), winding skeleton (4) is gone up coiling insulating barrier (6) and Copper Foil (5), be Copper Foil (5) above the insulating barrier (6), Copper Foil (5) thickness is 0.01～0.3 millimeter.

Technical solution of the present utility model also comprises:

The preferable of Copper Foil 5 thickness is chosen as 0.08～0.15 millimeter.

The top correspondence of insulating barrier 6 be complete Copper Foil 5.

The top correspondence of insulating barrier 6 be the Copper Foil 5 that has vertical cut-off lines 7.

The top correspondence of insulating barrier 6 be the Copper Foil 5 that has longitudinal divisions cut-off lines 8.

Description of drawings of the present utility model is as follows: Fig. 1 is the structure principle chart of single-phase magnetic amplifier, Fig. 2 is common paper tinsel formula winding construction schematic diagram, Fig. 3 is a series connection paper tinsel formula winding construction schematic diagram, Fig. 4 is a paper tinsel formula winding construction schematic diagram in parallel, Fig. 5 is and series connection paper tinsel formula winding construction schematic diagram, Fig. 6 is a composite insulating foil formula winding construction schematic diagram, and Fig. 7 is compound series connection paper tinsel formula winding construction schematic diagram.

Above-mentioned number in the figure is described as follows: 1-iron core, 2-direct current winding, 3-AC Windings, 4-winding skeleton, 5-Copper Foil, 6-insulating barrier, the vertical cut-off lines of 7-, 8-longitudinal divisions cut-off lines.

Advantage and effect that the scheme that the utility model is realized is brought are: replace the electromagnetic wire coiling with Copper Foil Exchange winding, the thickness of Copper Foil generally is no more than 0.3mm, with 0.08～0.15mm for better selection, one As in the situation every layer be a circle, can adopt the multilayer lap wound when long-pending such as the needs heavy in section. Paper tinsel formula winding have with Lower advantage: the one, space availability ratio is good, because the row that it can save electromagnetic wire accounts for around occupation efficiency, half storey The tension force occupation efficiency of duty factor and heavy in section electromagnetic wire; Reduce the process operation error, because duty system The minimizing of number can be reduced 1-2 specification satisfying under the principle of power requirement when choice criteria is unshakable in one's determination. Again since in the design of magnetic amplifier, exchange the number of turn square be proportional to the length of magnetic path, so iron circuit The minimizing of length makes and exchanges also correspondingly minimizing of the number of turn. Volume, weight are all reduced like this. The 2nd, energy Effectively reduce the impact of Kelvin effect and since under prismatic prerequisite Copper Foil than the surface area of flat type copper wire Increase considerably, the thickness decrease, the resistance that eddy current forms in Copper Foil is increased, and ammeter The area change that surface current is logical, the impact of Kelvin effect will reduce. The 3rd, the winding external form is carefully and neatly done, is easy to dress Join. Because paper tinsel formula material favourable identity, Copper Foil and insulating barrier be continuous coiling simultaneously again, and operate miss Little, the speed of processing and quality all are easy to be guaranteed. The 3rd, the experiment proved that: can reduce the winding duty About coefficient 30%, comprehensive volume also can reduce about 25-30%. For example former scheme 90KW magnetic amplifies The window unshakable in one's determination of device adopts 40 * 100mm, and the alternating current-direct current winding passes through (referring to Fig. 1) jointly because being unable to hold Be the iron core of 40 * 120mm and have to select window area, but surplus is arranged, through using paper tinsel formula winding instead then Adopt the window area of 40 * 80mm all can meet the demands, select iron core highly to reduce two specifications in fact Grade has reached the purpose of volume, weight corresponding minimizing. Draw through experiment in addition: when satisfying Copper Foil During the surface area of surface area 〉=4.25 times standard flat type copper wire the sectional area of Copper Foil is reduced to the standard copper wire cross section Long-pending 0.85 times, press 16.5A/mm²Current density is by the industrial frequency AC electric current, and at the two temperature rise no significant difference of three minutes, the actual current capacity of Copper Foil is 19.41A/mm like this², improve than flat type copper wire 2.91A, this just proves that Kelvin effect is weakening. Under prismatic condition, the effective resistance of Copper Foil ratio Flat type copper wire is little, and temperature rise and loss will improve, and this is for the equipment of this instantaneous duty of starter Very favorable.

Be described in further detail below in conjunction with accompanying drawing: referring to Fig. 1, performance element magnetic amplifier in magnet controlled motor soft starter, in actual applications, by three single-phase three-phase magnetic amplifiers that constitute shown in Figure 1, wherein direct current winding 2 is shared one an of three-phase.Single-phase magnetic amplifier has AC Windings 3 and direct current winding 2 to constitute on unshakable in one's determination 1, wherein AC Windings 3 transform full content of the present utility model as, concrete technology implementation scheme is provided by the following drawings.Referring to Fig. 2, this is common paper tinsel formula winding construction, form by winding insulating barrier 6 and Copper Foil 5 on the winding skeleton 4, and the complete Copper Foil 5 of correspondence on the insulating barrier 6, Copper Foil 5 thickness are generally 0.01～0.3 millimeter, are preferable selection with 0.08～0.15 millimeter.Every layer is a circle, is made of insulating barrier 6 and Copper Foil 5.Referring to Fig. 3, this can be in series by two windings or two above windings by Fig. 2 " series connection paper tinsel formula " winding of deriving out, and the coiling direction of each adjacent winding is opposite, and arranging like this is to be convenient to connection for two series connection joints.Referring to Fig. 4, basic identical with Fig. 2, difference is that the Copper Foil 5 above the insulating barrier 6 has vertically evenly cut-off lines 7, forms some strips, is paper tinsel formula winding in parallel, and this is in order further to limit the formation of Copper Foil internal magnetic field eddy current, to reduce the influence of skin effect.Fig. 5 is derived out by the structure of Fig. 4, two groups of adjacent windings that the coiling direction is opposite, and Copper Foil 5 has vertical cut-off lines 7 in each winding, form and series connection paper tinsel formula winding, the same Fig. 4 of principle, structure arrangement is identical with Fig. 3, referring to Fig. 6, it is the half-way house of Fig. 2 and Fig. 4, some uniform longitudinal divisions cut-off lines 8 are promptly arranged on Copper Foil 5, and do not destroy the globality of Copper Foil 5, the Copper Foil 5 that this longitudinal divisions cuts, with the resistance of increase Copper Foil internal magnetic field eddy current formation, and then the influence of restriction skin effect.Fig. 7 is the compound series connection paper tinsel formula winding construction that is derived by Fig. 6 structure, the same Fig. 6 of its principle, and structure is identical with Fig. 3 and Fig. 5.

Should be noted that Fig. 2, Fig. 4, Fig. 6 version are applicable to the equipment of big electric current, few number of turn, and the version of Fig. 3, Fig. 5 and Fig. 7 is applicable to that electric current is relative less, in the more equipment of the number of turn, angle from processing, the structure difficulty of processing of Fig. 4 and Fig. 5 is relative big, and other processing relative difficulty is little.

Above technical scheme also is applicable to the manufacturing of performance element in the acquired patent of applicant " magnetic tuning pressure type asynchronous machine energy-saving appliance ".

Claims

1, the magnet controlled motor soft starter of paper tinsel formula winding, by being wound with direct current winding (2) on the iron core (1) and AC Windings (3) is formed magnetic amplifier in the soft starter, it is characterized in that: in the AC Windings (3), winding skeleton (4) is gone up coiling insulating barrier (6) and Copper Foil (5), be Copper Foil (5) above the insulating barrier (6), Copper Foil (5) thickness is 0.01～0.3 millimeter.

2, the magnet controlled motor soft starter of paper tinsel formula winding according to claim 1, it is characterized in that: the preferable of Copper Foil (5) thickness is chosen as 0.08～0.15 millimeter.

3, the magnet controlled motor soft starter of paper tinsel formula winding according to claim 1 and 2 is characterized in that: the top correspondence of insulating barrier (6) be complete Copper Foil (5).

4, the magnet controlled motor soft starter of paper tinsel formula winding according to claim 1 and 2 is characterized in that: the top correspondence of insulating barrier (6) be the Copper Foil (5) that has vertical cut-off lines (7).

5, the magnet controlled motor soft starter of paper tinsel formula winding according to claim 1 and 2 is characterized in that: the top correspondence of insulating barrier (6) be the Copper Foil (5) that has longitudinal divisions cut-off lines (8).