CN2275771Y - Single-phase capacitor running electric machine - Google Patents

Abstract

The utility model discloses a single-phase capacitor running electric machine for a deep kitchen ventilator. The key point of the utility model is that the single-phase capacitor running electric machine overcomes the custom using method that the ratio of the length of an electric machine iron core and the inner diameter of the iron core is bigger than 0.3 in the deep kitchen ventilator. By the special design for parameters of the electric machine, that is the inner diameter of a stator is 72 to 78 mm; the length of the iron core is 18 to 22 mm; the active conductor numbers of a main phase is 3500 to 4400 turns; when the turns ratio of an auxiliary phase and the main phase is 1< Ka< 1.4, capacitance is 2 to 3 microfarad; when 0.8< Ka< 1, the capacitance is 3 to 4 microfarad; the copper using quantity of the electric machine of the deep kitchen ventilator is reduced to 30%; the temperature rise is descended to 15 DEG C; meanwhile, under low speed operation, noise is remarkably reduced.

Description

A kind of single-phase capacitor-operated motor

The utility model relates to monophase machine, is particularly suitable for using in the deep kitchen ventilator.

Deep kitchen ventilator is strong because of suction, low cruise has better gas exchange action, and liked by the user, mostly be the monotubular formula at the deep kitchen ventilator that uses at present, consider that environment for use need prevent that greasy dirt corrodes and guarantee that excellent blast index is arranged, the normal four extremely totally-enclosed single-phase capacitor-operated motors that adopt drive, 35～45 watts of its power outputs, stator punching external diameter in the prior art is 112～120mm, λ value (being core length/internal diameter unshakable in one's determination) is all greater than 0.3, and the tapping speed governing has 2～3 grades of rotating speeds usually, its high-grade rated speed is generally on 700 right sides of turning left, because this motor slippage is big, so the loss heating is serious, temperature rise exceeds standard, in addition, noise is also bigger when the lower-speed state of gas exchange action.

In view of this, the purpose of this utility model provides a kind of single-phase capacitor-operated motor that is used for deep kitchen ventilator, and this motor material is economized, and temperature rise is low, and the lower-speed state noise is little.

The purpose of this utility model realizes by the parameter of electric machine is redesigned, key is to overcome the motor λ value in the oil suction cigarette that has formed to follow the example of greater than 0.3 custom, of the present utility model four extremely totally-enclosed single-phase capacitor-operated motors, 35～45 watts of power outputs, frame diameter is 112～120mm, it is characterized in that internal diameter unshakable in one's determination is 72～78mm, core length is 18～22mm, its λ≤0.3 then, the stator groove depth is 1.3～1.7 with the ratio of groove mean breadth, the principal phase winding wire diameter is φ 0.27～0.29mm, the active conductor number is 3500～4400, and when paying with the principal phase turn ratio 1＜Ka＜1.4, electric capacity is got 2～3 microfarads, 0.8＜Ka＜1 o'clock, electric capacity is got 3～4 microfarads.

Motor speed still adopts the tapping speed governing, it can be the principal phase tapping, also can be to pay the phase winding tap, generally with the outer tap speed governing of principal phase for well, in, low or first gear is respectively: middle-grade line footpath φ 0.21～0.23mm is 0.2 with the principal phase turn ratio, and low-grade line directly φ 0.21～0.23mm and the principal phase turn ratio also is 0.2.

Because rotor is along with the increase of frame bore also increases; so also can adopt deep bar rotor usually; improve starting performance and improve air outlet stall rotating speed (being rotating speed under the light load) with further; generally make groove upper width≤groove lower width, and make the degree of depth of groove and ratio 〉=2.5 of the mean breadth of groove.

The motor that the utility model provides is because its frame bore D _I1Conventional electric machine iron core internal diameter in usefulness makes motor effective dimensions D in the range hood _I1 ²L increases, and effectively material is fully used, that is under the same electromagnetic load, the stator winding copper consumption reduces, and has both economized copper, has reduced copper loss again; And for the high slippage of dark this class of type lampblack absorber, the motor that rotor aluminium consumption is big, because diameter of stator bore increases, rotor diameter also increases thereupon, and the rotor radiating surface is strengthened, and can reduce electric machine temperature rise effectively.Because master, pair phase winding number of turn and electric capacity apolegamy are suitable, noise also obviously reduces during operation.

Accompanying drawing:

Fig. 1 is the utility model stator punching figure.

Fig. 2 is the outer tap elementary diagram of the utility model principal phase.

Fig. 3 is a rotor deep trouth schematic diagram.

Following is instantiation of the utility model, and the stator and rotor groove of motor is respectively 24 and 34 grooves, and frame diameter is 120mm, iron-core lamination as shown in Figure 1, (the stator groove depth is 1.4 with the ratio of groove width in this example, i.e. 2H/B ₁+ B ₂=1.4), internal diameter is 75mm, core length is 20mm, winding adopts the outer tap speed governing of principal phase, press line as shown in Figure 2, among the figure 1,2,3 represent the outer tap of high, medium and low shelves of principal phase A respectively, pay phase B and connect capacitor C, principal phase line footpath φ 0.27mm, the active conductor number is 3913, electricity shelves line warp is that the φ 0.23mm and the main shaft turn ratio are that 0.2 low-grade line is 0.2 through the φ 0.21mm and the main shaft turn ratio, pay with the main shaft turn ratio be 0.91, electric capacity 3.5 microfarads are in this example, rotor employing deep trouth, flute profile as shown in Figure 3, groove upper width b ₁With lower width b ₂Equate the mean breadth b of the degree of depth h of groove and groove ₁+ b ₂/ 2 ratio is 3.5.72 ℃ of this machine temperature rises, copper consumption 480 grams, running noises is little.

Examination is shown that with the single-phase capacitor-operated motor that the utility model provides parameter to make, the motor copper consumption more habitual than present deep kitchen ventilator reduces about 30%.Temperature rise can descend about 15 ℃, and simultaneously, under the low-speed running, noise obviously reduces.

Claims (3)

1. single-phase capacitor-operated motor, be four extremely totally-enclosed single-phase capacitor-operated motors, power output is 35～45 watts, frame diameter is 112～120mm, the tapping speed governing, it is characterized in that internal diameter unshakable in one's determination is 72～78mm, core length is 18～22mm, the stator groove depth is 1.3～1.7 with the ratio of groove mean breadth, and the principal phase winding wire diameter is φ 0.27～0.29mm, and the active conductor number is 3500～4400 circles, when paying with the principal phase turn ratio 1＜Ka＜1.4, electric capacity is got 2～3 microfarads, 0.8＜Ka＜1 o'clock, and electric capacity is got 3～4 microfarads.

2. by the described single-phase capacitor-operated motor of claim 1, it is characterized in that the outer tap speed governing of tapping speed governing employing principal phase, in, low or first gear is respectively: middle-grade line is through φ 0.21～0.23mm, with the principal phase turn ratio be 0.2, the low-grade line footpath φ 0.21～0.23mm and the principal phase turn ratio are 0.2.

3. by claim 1 or 2 described single-phase capacitor-operated motors, it is characterized in that the groove upper width [b of rotor ₁]≤groove lower width [b ₂], the mean breadth b of the degree of depth of groove [h] and groove ₁+ b ₂/ 2 ratio 〉=2.5.

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