CN2391376Y - Disk type AC electric motor - Google Patents

Abstract

The utility model relates to a disk type AC electric motor. Two disk type rotors which are uniformly distributed along the circumferential direction and provided with winding grooves in the radii direction are arranged in the centre of an electric motor shaft; disk type main stators which correspond to a disk type rotor (2) are uniformly distributed along the circumferential direction and provided with winding grooves in the radii direction; disk type auxiliary stators which correspond to a disk type rotor (3) are uniformly distributed along the circumferential direction and provided with winding grooves in the radii direction; via a regulator, the auxiliary stators can be rotated by a definite angle along the axial direction, windings of the main stators and windings of the auxiliary stators have the same phase number and the same phase sequence and are connected with the same alternating current power supply. The utility model has the advantages of soft magnetic material saving, high efficiency, big starting torque and small current; starting mode is agile and can be regulated, and a function that the speed is regulated from 0 to a rated value is realized.

Description

A kind of disc type unsteady flow motor

The utility model relates to a kind of disc type alternating current motor, particularly a kind of disc type double stators and double rotors cage modle AC asynchronous motor.

Utilize minimum raw material, the simplest technology, produce the motor of fitst water performance, be that people make great efforts the problem furtherd investigate always for a long time, asynchronous machine is the mouse-cage type asynchronous machine especially, and is because it is simple to have manufacturing process, perpendicular solid durable, advantages such as nothing electrically contacts, and is cheap and being used widely by the utmost point.Yet existing mouse type asynchronous machine also exists deficiency and obvious defects in some respects.At first owing to be subjected to the restriction of its structure, it is bigger that its root diameter is unfit to do, and this just makes the soft magnetic material consumption of whole motor and magnetic hysteresis loss seem too much.Secondly, its startability is not good, and detent torque is little.To such an extent as to jumbo slightly motor just need adopt deep trouth or two cage technical scheme to rotor, but this technical scheme itself is a cost to increase manufacturing raw material and technology.Simultaneously, its starting current is bigger.To electrical network and the impact that itself causes, influence one of principal element of motor useful life and harm power grid security often during startup.The 3rd, mouse-cage type asynchronous motor drive difficulty, the motor of especially big-and-middle capacity does not search out a kind of economical and practical speed regulating method so far.Yet be subjected to the attraction of its advantage, many plant equipment that the speed governing requirement arranged will its as power source, and use valve or baffle plate that required flow is regulated.Usually very huge of the waste of energy that this unscientific control method caused.

The purpose of this invention is to provide a kind of disc type unsteady flow motor

The purpose of this utility model is to realize like this;

A kind of disc type alternating current motor, comprise motor shaft, it is circumferentially uniform and have a disk rotor of slot for winding at radial direction to it is characterized in that central authorities at motor shaft are furnished with two edges back-to-back, should during with disk rotor (2), be provided with along circumferentially uniform and have a disc type main stator of slot for winding at radial direction, corresponding with disk rotor (3), be provided with along circumferentially uniform and have a disc type auxiliary stator of slot for winding at radial direction, by adjuster auxiliary stator is slowly rotated a certain angle vertically, the winding of main stator has the identical number of phases with the winding of auxiliary stator and phase sequence is connected to same AC power.

Aforesaid disc type alternating current motor is characterized in that being inlaid with sliver in the groove of disk rotor, connects and have of one's own independent closed-loop path with two rotor bars of radial direction vertically at its initial and tail sections.

The utlity model has the saving soft magnetic material, the efficient height, detent torque is big, electric current is little, and Starting mode can be in harmonious proportion flexibly and realize 0 function to the rated value speed governing.Very be suitable as and drag that to rotate the moments of inertia big or the power source of the big-and-middle-sized plant equipment of speed governing requirement arranged.

Below in conjunction with accompanying drawing structure of the present utility model is done detailed explanation

Fig. 1 is a structural representation of the present utility model

Fig. 2 is an A-A cut-away view of the present utility model

Fig. 3 is a B-B cut-away view of the present utility model

Fig. 4 is a partial cutaway diagrammatic sketch of the present utility model

Fig. 5 is the utility model torque factor schematic diagram

The utility model comprises motor shaft 1, it is circumferentially uniform and have the disk rotor 2 and 3 of slot for winding at radial direction to be furnished with two edges back-to-back in the central authorities of motor shaft 1, separates both magnetic circuits by non-magnetic metal 4 between the disk rotor 2 and 3 and is fixed on the motor shaft 1.In the groove of disk rotor 2 and 3, be inlaid with sliver 5, connect and have of one's own independent closed-loop path vertically at its initial and tail sections with two rotor bars 5 of radial direction.Corresponding with disk rotor 2, be provided with along circumferentially uniform and have a disc type main stator 6 of slot for winding at radial direction.Corresponding with disk rotor 3, be provided with disc type auxiliary stator 7, by adjuster 8 auxiliary stator 7 is slowly rotated a certain angle vertically.The winding 9 of main stator has the identical number of phases with the winding 10 of auxiliary stator 7 and phase sequence is connected to same AC power.

Auxiliary stator 7 is fastening by annular framework 11, and annular framework 11 is stuck in the auxiliary stator shell 12, and can rotate 12 relative to the auxiliary stator shell, and auxiliary stator shell 12 is by motor shaft 1 supporting, and can rotate along motor shaft 1.On annular framework 11, arc-shaped rack 13 is housed, adjuster 8 is housed on auxiliary stator shell 12, comprise in the adjuster 8 and regulate motor 14 and brake 15, on the output shaft of adjusting motor 14 gear 16 is housed, gear 16 and arc-shaped rack 13 engagements.When rotating, motor 14 drives auxiliary stator 7 rotations when regulating.

The utility model can be saved manufactured materials relatively when increasing the rotor radius.When the locus of reasonable adjusting auxiliary stator 7, availability is superior, flexible and changeable starting characteristic.When the locus of slow adjusting auxiliary stator 7, the rotating speed of motor is changed between the rated value 0.

Principle of the present utility model is described as follows:

By the Electrical Motor principle as can be known the electromagnetic torque of asynchronous machine can be expressed as: $\mathrm{Tm}=\mathrm{\&Sigma;<figure-callout\; id="2"\; label="f\; D"\; filenames="Y9923688000082.png"\; state="\{\{state\}\}">f</figure-callout>}\frac{D}{}\frac{}{2}=\mathrm{\&Sigma;<figure-callout\; id="2"\; label="BLi\; D"\; filenames="Y9923688000082.png"\; state="\{\{state\}\}">BLi</figure-callout>}\frac{D}{}\frac{}{2}$

In the formula: the B-magnetic induction intensity

L-rotor bar effective length

I-rotor bar electric current

The D-root diameter

The big or small available formula π DL of the soft magnetic material that asynchronous machine consumed represents, if Tm, B, i equate, then along with the increase of root diameter, increase because the groove number is corresponding, and ∑ i direct ratio increases, and its substitution following formula can be drawn to draw a conclusion; It is the soft magnetic material that consumes of the motor ratio that will increase by root diameter and reducing.For example, after the diameter of motor increases to 50 centimetres by 30 centimetres, its required consumption soft magnetic material will reduce 40%.Accomplish this point, as a rule, not difficult for the utility model.

Can list the electric potential balancing equation of this disc-type electric motor according to the Electrical Motor principle: ${\stackrel{\&CenterDot;}{U}}_{11}={\stackrel{\&CenterDot;}{I}}_{11}(r_{11}+{\mathrm{jx}}_{11})-{\stackrel{\&CenterDot;}{E}}_{11}$ ${\stackrel{\&CenterDot;}{U}}_{12}={\stackrel{\&CenterDot;}{I}}_{12}(r_{12}+{\mathrm{jx}}_{12})-{\stackrel{\&CenterDot;}{E}}_{12}$ ${\stackrel{.}{E\text{'}}}_2={\stackrel{.}{E}\text{'}}_{21}+{\stackrel{.}{E}\text{'}}_{22}={\stackrel{.}{I}\text{'}}_2\left({r\text{'}}_2\text{/S+}{\mathrm{jx}\text{'}}_2\right)={\stackrel{.}{I}\text{'}}_{2}Z\text{'}$ ₂--formula (1) Z ' ₂=r ' ₂/ S+jx ' ₂The magnetic potential balance equation: ${\stackrel{\&CenterDot;}{I}}_{11}+{\stackrel{.}{I}\text{'}}_2={\stackrel{\&CenterDot;}{I}m}_1$ ${\stackrel{\&CenterDot;}{I}\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="Y9923688000082.png"\; state="\{\{state\}\}">l</figure-callout>}}_2+{\stackrel{.}{I}\text{'}}_2={\stackrel{\&CenterDot;}{I}\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="Y9923688000082.png"\; state="\{\{state\}\}">m</figure-callout>}}_2$

When the winding 9 of disc type stator and 10 feeds the three-phase current of symmetry, it will set up the rotation main field in the air gap of planar rings shape separately, and will act on simultaneously on the rotor winding 5.The rotation main field is the fundametal compoment generation that is formed stator rotating magnetic potential ripple by exciting curent, and this rotating magnetic potential ripple can be expressed as

, it is a space vector, its particular location in the space is that the location parameter in the space determines jointly by time parameter and stator winding.The utility model two stator winding connect and same power supply, and time parameter is constant.Therefore, change, thereby can make the induced potential of rotor along with the rotation of auxiliary stator 7 just can make the rotation main field relative space position in the two stator air gaps

With

Between angle between 0 ° to 180 °, change.In order to further specify operation principle of the present utility model, it is in full accord now to establish two rotor parameters, and after ignoring some secondary causes, then formula (1) can be write as: ${\stackrel{.}{E}\text{'}}_{21}+{\stackrel{.}{E\text{'}}}_{22}={\stackrel{.}{E}\text{'}}_{21}+{\stackrel{.}{E}\text{'}}_{21}(\mathrm{CosQ}+\mathrm{jSinQ})=\stackrel{.}{I}\text{'}$ ₂Z’ ₂ ${\stackrel{.}{E}\text{'}}_{21}={\stackrel{.}{I}}_2{\mathrm{<figure-callout\; id="2"\; label="Z"\; filenames="Y9923688000082.png"\; state="\{\{state\}\}">Z</figure-callout>}}_2/(1+\mathrm{CosQ}+\mathrm{jSinQ})={I\text{'}}_2{Z\text{'}}_2$ ${\stackrel{.}{E}\text{'}}_{21}(1+\mathrm{CosQ}+\mathrm{jSinQ})={I\text{'}}_2{Z\text{'}}_2$ Z " ₂=Z ' ₂/ (1+CosQ+jSinQ) Q-is E ' ₂₁With E ' ₂₂Between angle

By being about to the utility model equivalence with up conversion, only need impedance with rotor circuit by Z ' for having only the common asynchronous moter of a stator and rotor ₂Become Z " ₂Get final product.For its characteristic more directly is described, existing with the above-mentioned equation of the substitution of certain interconnected cage motor parameter and the torque factor when calculating the different Q value be painted on the figure.Be convenient to also be painted with in the comparison diagram interconnected cage motor torque factor of identical parameters.As seen from the figure: when the winding of main stator and auxiliary stator staggers 135 ° of electrical degrees startups mutually, detent torque of the present utility model will be bigger 1.9 times than squirrel-cage motor, but its rotor electromotive force has only 50% of squirrel-cage motor.When Q=165 ° started, detent torque still was slightly larger than squirrel-cage motor, but rotor electromotive force have only its 13%.Not ugly thus: the utility model can adopt flexible and changeable Starting mode according to different load characteristics, can not only motor be started fast, but and the utmost point reduce impulse current when starting effectively.This is a kind of highly desirable Starting mode.

According to the Electrical Motor principle as can be known:, just can realize the purpose of speed governing as long as seal in additional electromotive force in the asynchronous machine rotor loop and change its size.The induced potential in this motor rotor loop is:

When rotation auxiliary stator 4 changes the Q angle between 0-180,

Numerical value will be at 2E ₁₂Change between 0, this variation forces the revolutional slip S of this motor to change between rated value to 1, and then has realized the purpose of speed governing.Work as E ₂=2E ₁₂The time, be equivalent to two asynchronous motor paired runnings.When

The time,

, S=1, this moment, two stator winding only had exciting curent.In the process of regulating auxiliary stator 4, when With

Between angle greater than after 90s, the asynchronous machine that auxiliary stator constituted will be become " generator " running status by motoring, be used to absorb slip power and feed back to power supply.

In sum, disc type double stators and double rotors asynchronous motor not only has the advantage of squirrel-cage motor, and on its basis with still less manufacturing raw material, fundamentally solved the startup and the speed governing problem of squirrel-cage motor.Itself is fit to manufacture high pressure again simultaneously, the motor of big-and-middle capacity, so the utility model is a kind of electric machine structure form with boundless development prospect.

Claims (3)

1. disc type alternating current motor, comprise motor shaft (1), it is circumferentially uniform and have disk rotor (2) and (3) of slot for winding at radial direction to it is characterized in that central authorities at motor shaft (1) are furnished with two edges back-to-back, corresponding with disk rotor (2), be provided with along circumferentially uniform and have a disc type main stator (6) of slot for winding at radial direction, corresponding with disk rotor (3), be provided with along circumferentially uniform and have a disc type auxiliary stator (7) of slot for winding at radial direction, by adjuster (8) auxiliary stator (7) is slowly rotated a certain angle vertically, the winding (10) of winding of main stator (9) and auxiliary stator (7) has the identical number of phases and phase sequence is connected to same AC power.

2. disc type alternating current motor according to claim 1 is characterized in that being inlaid with sliver (5) in the groove of disk rotor (2) and (3), connect and have of one's own independent closed-loop path with two rotor bars (5) of radial direction vertically at its initial and tail sections.

3. disc type unsteady flow motor according to claim 1 and 2, it is characterized in that auxiliary stator (7) is fastening by annular framework (11), annular framework (11) is stuck in the auxiliary stator shell (12), and can rotate (12) relative to the auxiliary stator shell, auxiliary stator shell (12) is supported by motor shaft (1), and can rotate along motor shaft 1.Arc-shaped rack (13) is housed on annular framework (11), adjuster (8) is housed on auxiliary stator shell (12), comprise in the adjuster (8) and regulate motor (14) and brake (15), on the output shaft of adjusting motor (14) gear (16) is housed, gear (16) and arc-shaped rack (13) engagement.

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