CN1314185C

CN1314185C - Proper fraction groove sinusoidal winding of synchronous generator

Info

Publication number: CN1314185C
Application number: CNB011284951A
Authority: CN
Inventors: 林政安
Original assignee: Tellhow Sci Tech Co Ltd
Current assignee: Tellhow Sci Tech Co Ltd
Priority date: 2001-09-25
Filing date: 2001-09-25
Publication date: 2007-05-02
Anticipated expiration: 2021-09-25
Also published as: CN1409460A

Abstract

The present invention discloses a sine winding with proper fraction slots for a synchronous generator. When the slot number q of each phase of each pole of the sine winding with proper fraction slots for a synchronous generator is less than one, by the continuous winding of coils of a special winding, the double-layer symmetrical arrangement and the three-layer symmetrical arrangement can be formed, and the turn ratio of the coils is 2 to 1. the technology of the sine winding with proper fraction slots for a synchronous generator is simpler than that of a concentric type sine winding with unequal turns; the height of the waveform of the phase voltage of a generator has sinusoidal performance, and the content of harmonic waves is lower than that of harmonic waves of a concentric type double-layer sine winding with unequal turns and low harmonic wave magnetic potential. Thus, precise high-grade intermediate frequency AC power supply is easy to manufacture, and the requirement of equipment with a high electric property requirement can be met. Because q is less than one, the generator has small volume and light weight; moreover, because the sine winding with proper fraction slots enables the height of the waveform of an intermediate frequency voltage to have sinusoidal performance, the waveform distortion rates of a line voltage and the phase voltage are both less than 1%. the electric property is excellent and reaches the leading level in China and the international advanced level.

Description

A kind of decentraction is the equidistant synchronous generator winding not

Technical field

The present invention relates to a kind of power-supply device, especially a kind of decentraction is the equidistant synchronous generator winding not.

Background technology

At present, general multipole synchronous generator factor receptor is long-pending to be limit, and every extremely every phase groove is counted q and usually got mark.And in intermediate frequency generator often q also may get mark less than 1.Q less than 1 fractional-slot proper faction groove.When every extremely every phase groove is counted q=7/8, be exactly proper faction groove.This moment is if be double-deck short distance formula structure by general public winding construction, and the irregularity of wave form that the proper faction groove three-phase alternating current winding of this ordinary construction can't accomplish to make its line voltage and phase voltage is all less than 2% level.And another kind of structural shape, is not suitable for using and does not wait circle concentric type structure owing under the q=7/8 situation not waiting circle concentric type structure winding, because the end winding of this structure winding this moment is very long, the winding leakage reactance is very big, no Practical significance.

Summary of the invention

The object of the present invention is to provide a kind of every grade of every phase groove to count the not equidistant formula winding of q=7/8 synchronous generator decentraction, a kind of concrete winding construction is provided, this structure can overcome above-mentioned defective, can make every extremely every phase groove count the irregularity of wave form of the intermediate frequency synchronous generator line voltage of q=7/8 and phase voltage all less than 2%.

Technical scheme of the present invention is: a kind of synchronous generator winding, the number of stator slots of this generator windings are 21 grooves, and number of poles is 8 utmost points, and the number of phases is 3 phases, and every extremely every phase groove is counted q=7/8, is a kind of proper faction groove.Stator winding presses Fig. 1 location arrangements and table one structure is formed.Wherein main winding is three symmetrical A, B, C phases, and every phase all is made up of 8 coils, and every circle number of turn distributes rule also identical among 8 coils of every phase, and 120 ° of A, B, C three-phase mutual deviations constitute three symmetrical phase windings.For the purpose of clearer, below the A phase winding is done more careful narration.The A phase winding is made up of 8 turn coil, this 8 turn coil is continuous coiled on winding former earlier, note the number of turn difference of every circle during coiling, then 8 circles are embedded in respectively in the stator core slot continuously, so-called company technology under connecting that Here it is, A non junction in the middle of 8 turn coil mutually like this, only draw two terminal A, X, A draws from the 2nd groove, and X draws from the 20th groove, simple and the non junction of this sampling technology, the reliability height.Contrast Fig. 1 can know that A phase 8 circle windings are to form like this: the 1st circle, 2n circle/circle, span 2-4 groove; The 2nd circle, 1n circle/circle, span 1-5 groove; The 3rd circle, 2n circle/circle, span 7-9 groove; The 4th circle, 1n circle/circle, span 8-10 groove; The 5th circle, 2n circle/circle, span 12-14 groove; The 6th circle, 2n circle/circle, span 13-15 groove; The 7th circle, 1n circle/circle, span 17-19 groove; The 8th circle, 2n circle/circle, span 18-20 groove.n＝1，2，3……。Therefore, conclusion is got up, and in A phase 8 turn coil, two kinds of pitches is arranged, and a kind of span all is to be equivalent to stride 2 grooves, all is to be equivalent to 1-3, and this pitch is 27 circles that have; Another kind of span all is to be equivalent to stride 4 grooves, and this pitch is 4, and span is 1-5, only 1 circle.Turn ratio in this 8 circle is 1: 2nd, a kind of regulation.Therefore, the number of turn that thick line is represented among Fig. 1 is exactly 2 times of the number of turn represented of fine rule.B phase, C also respectively are that 8 turn coil are formed mutually, and component law is mutually just the same with A, and just the position is by shown in Figure 1, and B draws B mutually, the Y mark, and B draws from the 9th groove, and Y draws from the 6th groove.C draws from the 16th groove, and Z draws from the 13rd groove.Make and 120 ° of A, B, C mutual deviations constituted three-phase symmetric winding.According to the above-mentioned structure law of narrating,, can learn that wherein in 1,5,8,12,15,19 six grooves be three layers, and be bilayer in all the other grooves from Fig. 1 and table one.Have only as can be known simultaneously that the conductor number is 2 in 3,10,17 grooves, (or be 2n conductor number), in other groove the conductor number be 4 (or be 4n conductor number, n=1,2,3 ...), copper factor is than outside low in 3,10,17 grooves so remove, and the copper factor of other grooves is identical.When in the stator winding except the three-phase main winding, also the excitation source winding to be set, during for example humorous wave winding, then humorous wave winding is arranged in the double-deck groove humorous as shown in Figure 2 wave winding S ₁S ₂Layout, then the number of plies at most also is three layers in whole generating machine stator slot for winding this moment.This is identical with the general harmonic excited generator stator slot winding number of plies, and technology is ripe, and enforcement is easily.

Table one A phase coil structural table

The invention has the advantages that:

1) realized that every extremely every phase groove counts the equidistant formula winding of q=7/8 decentraction, it is simple in structure, the technology tradition.The line voltage, phase voltage waveform aberration rate that but can make its generator are all less than 2%, and it has overcome traditional winding is double-deck short distance winding wire voltage, and the phase voltage waveform aberration rate can't be less than 2% simultaneously, thereby can't make the defective of high-quality intermediate frequency power supply.It has also overcome q=7/8 and has not waited the low phase belt harmonic wave winding construction leakage reactance of circle concentric type structure too big, the defective of no Practical significance.

2) though three phase windings be by double-deck and three layers constitute, also can arrange humorous wave winding in the bilayer, make generator unit stator still be three layers, copper factor is even substantially, economical rationality.

Description of drawings

Fig. 1 is a not equidistant synchronous generator winding A phase coil layout plan of a kind of decentraction of the present invention.

Fig. 2 is a kind of decentraction of the present invention humorous wave winding of equidistant synchronous generator winding position view that rolls off the production line not.

Embodiment

For clearer, be further described in conjunction with specific embodiments.Embodiment 30KW, a phase voltage 115V, 400Hz, three-phase four-wire system, 3000r/min intermediate frequency brushless generator, the usefulness of aircraft energizer is made in AC and DC hybrid power supply.Its stator core external diameter Φ 300mm, several 42 grooves of groove, number of poles 16 utmost points, every extremely every phase q=7/8, main winding A phase (for make drawing clear for the purpose of, B, C needn't draw mutually) feature that rolls off the production line such as Fig. 1, every circle 8 circles of thick line, every circle 4 circles of fine rule, wire gauge is 8-Φ 1.8, a way a=2 whenever is in parallel.Be about to also that 42 grooves are divided into preceding 21 grooves and back 21 grooves, two parts are that 1-21 groove winding is arranged fully by shown in Figure 1, then 22-42 groove winding is arranged also to finish by 1-21 recess gauge rule and is repeated to arrange, so the 22-42 layout plan can omit, and does not influence flesh and blood.

The winding of this structure, when being used as Alternating Current Power Supply, be three-phase four-wire system, line voltage, the phase voltage waveform aberration rate is less than 1%, mains ripple when being used as rectifier power source and being rectified into direct current is little, meets the requirement of the GJB GJB572 of People's Republic of China (PRC) aircraft energizer supplied character fully.

Claims

1, a kind of synchronous generator, every extremely every phase groove number of its winding is 7/8, it is characterized in that: winding construction is that decentraction is not equidistant yet, and number of stator slots is 21 grooves, number of poles is 8 utmost points, the number of phases is 3 phases, and this synchronous generator winding is by two kinds of pitches, and a kind of pitch is 2, a kind of pitch is 4, two kinds of numbers of turn are two, three layers of three-phase symmetric winding of forming of the coil than 1: 2 at double, and this winding is that non junction connects around connecting down, and the symmetric winding that the position is divided equally in groove constitutes.