CN205670737U - High speed dual rotor AC asynchronization motor - Google Patents
High speed dual rotor AC asynchronization motor Download PDFInfo
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- CN205670737U CN205670737U CN201620538966.5U CN201620538966U CN205670737U CN 205670737 U CN205670737 U CN 205670737U CN 201620538966 U CN201620538966 U CN 201620538966U CN 205670737 U CN205670737 U CN 205670737U
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- asynchronous motor
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Abstract
The utility model discloses a kind of high speed dual rotor AC asynchronization motor, including stator, the first rotor and the second rotor, described the first rotor is set in outside described second rotor, it is provided with interstice between described the first rotor and described second rotor, described the first rotor is positioned at described stator, is provided with the first air gap between described stator and described second rotor.Compared with prior art, this utility model is by improving the structure of AC asynchronous motor and changing the distribution of rotating excitation field, export the most too high supply frequency at converter and do not increase high-power switch device loss, under conditions of asynchronous motor iron core magnetic hysteresis and the eddy-current loss of the most not increasing exchanges, it is achieved running up of AC asynchronous motor.
Description
Technical field
This utility model relates to a kind of alternating current generator, particularly relates to a kind of high speed dual rotor AC asynchronization motor.
Background technology
AC asynchronous motor application in motor driving field is quite varied, the operation of existing AC asynchronous motor
Rotating speed n=(1-s) n0, wherein s is revolutional slip, synchronous rotational speed n0=60f/p, and prior art is in condition certain for magnetic pole logarithm p
Under, it is highly effective method by improve supply frequency f improving asynchronous motor speed, the frequency conversion of AC asynchronous motor is driven
Kinetic energy solves the rotational speed regulation of asynchronous motor the most well.The mode of operation of converter is AC-DC-AC, applies large power, electrically
Sub-switching device performs PWM and switchs copped wave, efficiently realizes the conversion of out-put supply frequency.When required supply frequency f is higher than power frequency
Belonging to up-conversion during 50HZ, its PWM switch chopping frequency is up to more than 10kHZ.The current demand to high-speed motor is increasingly
Height, when needing to improve out-put supply frequency f further, PWM switch chopping frequency will be higher, when chopping frequency is higher than 20KHZ
Time above, the switching loss that too high switch chopping frequency makes high-power electronic switch device accumulate significantly increases, and makes high-power
Switching device loses energy-efficient advantage.The most feasible technical solution is to use resonant switch technology, applies resonance
The soft switch technique of switch reduces the switching loss of high-power switch device.The shortcoming of this technical scheme has in two: 1 converters big
It is relatively costly that power resonance switchs, and circuit structure is complicated；When 2 converters export higher supply frequency, can increase again electronic
The magnetic hysteresis of machine iron core and eddy-current loss, need to use the frequency-conversion high-speed AC asynchronous motor of special low iron loss.
Utility model content
The purpose of this utility model is that provides a kind of high speed dual rotor AC asynchronization electricity to solve the problems referred to above
Motivation.
This utility model is achieved through the following technical solutions above-mentioned purpose:
This utility model includes stator, the first rotor and the second rotor, and described the first rotor is set in described second rotor
Outward, being provided with interstice between described the first rotor and described second rotor, described the first rotor is positioned at described stator, institute
State and be provided with the first air gap between stator and described second rotor.
Specifically, low-frequency ac power is used to power.
The beneficial effects of the utility model are:
This utility model is a kind of high speed dual rotor AC asynchronization motor, and compared with prior art, this utility model leads to
Cross the distribution that the structure to AC asynchronous motor is improved and changed rotating excitation field, in the supply frequency that converter output is the most too high
Do not increase high-power switch device loss, under conditions of the most do not increase exchanges asynchronous motor iron core magnetic hysteresis and eddy-current loss, real
Running up of existing AC asynchronous motor.
Accompanying drawing explanation
Fig. 1 is cross section structure schematic diagram of the present utility model；
Fig. 2 is vertical section structure schematic diagram of the present utility model.
In figure: 1-stator, 2-the first air gap, 3-the first rotor, 4-interstice, 5-the second rotor.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings:
As depicted in figs. 1 and 2: this utility model includes stator 1, the first rotor 3 and the second rotor 5, described the first rotor 3
It is set in outside described second rotor 5, between described the first rotor 3 and described second rotor 5, is provided with interstice 4, described
One rotor 3 is positioned at described stator 1, is provided with the first air gap 2 between described stator 1 and described second rotor 5.
Specifically, low-frequency ac power is used to power.
Circumferentially embed threephase stator winding in three-phase AC asynchronous motor stator inner circle, pass to three phase sine exchange
Forming rotating excitation field during electricity in the rotor air gap with stator, rotating excitation field produces, with rotor outer circle sliver relative motion, electricity of inducting
Stream, the magnetic field of induced current interacts with rotating excitation field, and drive rotor rotates along rotating excitation field direction.The rotating speed of rotating excitation field
N0=60f/p, owing to rotor needs and rotating excitation field relative motion, rotating speed always lags behind rotating excitation field rotating speed, between them
There is revolutional slip s=(n0-n)/n0, so rotor speed n=(1-s) 60f/p.If s=0.05, f=50HZ, p=2, then n=
1425r/min。
Present design is to find in the in-depth analysis to asynchronous motor rotor rotary principle, and rotating excitation field is present in
In the air gap of stator and rotor, magnetic circuit forms closed-loop path through air gap and the stator of air gap periphery and rotor core.Magnetic pole logarithm
The most, this phenomenon is the most obvious.The annulus gap radius of existing rotor with stator is increased, original rotor designs second ring
Shape air gap forms the second rotor.The inner circle of the second annulus gap embeds a set of threephase stator winding equally, uses slip ring to supply
Electrically pass to three phase sine alternating current, then same generation the second rotating excitation field in interstice, can act on second equally
Rotor.If keeping the power phase in two windings identical, then the rotating excitation field direction in twice air gap is consistent, makes the second rotor
Rotate on the basis of the first rotor rotates, then the second rotor is relative to rotating speed n=n1n2=[(1-s1) 60f1/ of pedestal
p1}][(1-s2)60f2/p2].If assuming s1=s2, f1=f2, p1=p2, then the second rotor is relative to the rotating speed n=of pedestal
n12.As can be seen here, need not too high supply frequency and do not increasing the condition of high-power electronic switch devices switch loss
Under, by rational modification asynchronous motor rotor structure, change the distribution of air-gap rotating magnetic field, it becomes possible to realize exchange different
Running up of step motor.Work as s1=s2=0.05, as a example by f1=f2=50HZ, p1=3, p2=2, the second rotor relative to
Pedestal rotating speed may be up to: n=1353750r/min.
The method phase that converter out-put supply frequency raises speed is improved to AC asynchronous motor with using resonant switch technology
Ratio, the invention have the advantages that
1, without only by improving supply frequency, uses the converter of conventional down coversion just can realize AC asynchronous motor
Run up, it may not be necessary to use resonant switch technology, use the converter low cost of down coversion.
2 high speed dual rotor AC asynchronization motor can be mutual under conditions of power is identical with ordinary ac asynchronous motor
Changing and use identical converter, the use at converter has good interchangeability, beneficially engineer applied.
3 high speed Asynchronous Motor with Double Rotor dissipate at machinery dynamic balancing, high-speed bearing, motor with common high-speed asynchronous motor
The technology of the aspects such as heat requires identical, but owing to working power frequency is relatively low, core loss is low, motor low cost, cost performance
High.
The power of 4 high speed Asynchronous Motor with Double Rotor is birotor power sum, i.e. general power p=p1+p2=n1Tmax1+
n2Tmax2, work as n1=n2And Tmax1=Tmax2Time p=2n1Tmax1, again due to p=nTmaxAnd n=n1 2, so output torque Tmax=
P/n=Tmax1/n1+Tmax2/n2=Tmax12/n1。
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.One's own profession
Skilled person will appreciate that of industry, this utility model is not restricted to the described embodiments, described in above-described embodiment and description
Principle of the present utility model is simply described, on the premise of without departing from this utility model spirit and scope, this utility model is also
Have various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.This utility model
Claimed scope is defined by appending claims and equivalent thereof.
Claims (2)
1. a high speed dual rotor AC asynchronization motor, it is characterised in that: include stator, the first rotor and the second rotor, institute
State the first rotor to be set in outside described second rotor, between described the first rotor and described second rotor, be provided with interstice,
Described the first rotor is positioned at described stator, is provided with the first air gap between described stator and described second rotor.
High speed dual rotor AC asynchronization motor the most according to claim 1, it is characterised in that: use low-frequency ac power
Power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620538966.5U CN205670737U (en) | 2016-06-06 | 2016-06-06 | High speed dual rotor AC asynchronization motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620538966.5U CN205670737U (en) | 2016-06-06 | 2016-06-06 | High speed dual rotor AC asynchronization motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205670737U true CN205670737U (en) | 2016-11-02 |
Family
ID=57193394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620538966.5U Expired - Fee Related CN205670737U (en) | 2016-06-06 | 2016-06-06 | High speed dual rotor AC asynchronization motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205670737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411078A (en) * | 2016-06-06 | 2017-02-15 | 陈铁钢 | High-speed birotor alternating current asynchronous motor |
-
2016
- 2016-06-06 CN CN201620538966.5U patent/CN205670737U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411078A (en) * | 2016-06-06 | 2017-02-15 | 陈铁钢 | High-speed birotor alternating current asynchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20161102 Termination date: 20170606 |