CN104052195A - Air cooling method and device of permanent magnet motor - Google Patents
Air cooling method and device of permanent magnet motor Download PDFInfo
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- CN104052195A CN104052195A CN201410333509.8A CN201410333509A CN104052195A CN 104052195 A CN104052195 A CN 104052195A CN 201410333509 A CN201410333509 A CN 201410333509A CN 104052195 A CN104052195 A CN 104052195A
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- air
- temperature
- cool
- permanent magnet
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Abstract
The invention discloses an air cooling method and device of a permanent magnet motor. The device comprises a low-temperature cooler, a draught fan and the permanent magnet motor, wherein the low-temperature cooler provides low-temperature cold air, natural air and low-temperature cooling air cooled by the low-temperature cooler are mixed by the draught fan in a certain proportion according to the operation condition of the motor so that needed low-temperature air can be formed and fed into the air gap of the permanent magnet motor, a circulation air path is formed, a rotor and a stator of the permanent magnet motor are cooled, meanwhile, a low-temperature isolation layer can be formed in the air gap (4) of the permanent magnet motor, influences on a rotor permanent magnet caused by heat of a stator winding are reduced, and the working temperature of a motor permanent magnet can be lowered from a high temperature to a lower temperature. Due to the method and device, the working temperature of the permanent magnet motor is effectively lowered, and the overall performance of the permanent magnet motor is improved.
Description
Technical field
The present invention relates to field of motor manufacturing, especially relate to a kind of wind cooling temperature lowering method and device of magneto.
Background technology
Existing magneto generally adopts that base outer Surface Mount radiating ribs natural air is cooling, the cool mode such as but of the cooling combination of circulated air of the cooling rear formation of the cooling and inner logical natural air of base outer Surface Mount radiating ribs natural air, the absolutely empty cool empty water but, with radiator with radiator, and these modes all can not effectively reduce the working temperature of magnet steel.And the heatproof degree of permanent magnet is higher, in permanent magnet, determine that the heavy rare earth element antimony demand of permanent magnet limit working temperature is just more, cause the price of permanent magnet more expensive, this has caused the cost of generator higher undoubtedly.The temperature coefficient of Nd-Fe-Bo permanent magnet material is higher in addition, its magnetic property thermal stability is poor, and while at high temperature use, magnetic loss is larger, and irreversible demagnetization easily occurs, cause like this magneto under different ambient temperatures, to embody different performances, affected stability and the dynamic capability of motor.
Summary of the invention
In order to solve the above-mentioned technical problem of existing direct-drive permanent magnet wind power generator existence, the invention provides a kind of wind cooling temperature lowering method and device of the magneto that can effectively improve the working temperature of permanent magnet.
The technical scheme that the present invention solves the problems of the technologies described above comprises the following steps: blower fan is mixed to form Cryogenic air by natural air with through the cool but air proportion of the cool low temperature but of the cool but device of low temperature, Cryogenic air is sent into the working temperature of motor gas-gap reduction permanent magnet.
In the wind cooling temperature lowering method of above-mentioned magneto, the cool but air of described natural air and low temperature mixes in the given ratio of following formula:
q
1(T
1-T
3)＝q
2(T
3-T
2)
Q in above formula
1for natural air flow, q
2for sub-cooled air mass flow, T
1for natural air temperature, T
2for sub-cooled air themperature, T
3for mixed low-temperature cold wind temperature.
A kind of Wind cooling temperature reducing device of magneto, comprise the cool but device of low temperature, blower fan, magneto, the cool but device of low temperature provides low temperature cool wind, blower fan is mixed to form Cryogenic air by natural air with through the cool but air of the cool low temperature but of the cool but device of low temperature, and Cryogenic air is sent into magneto air gap formation circulation wind path, Cryogenic air is carried out cooling to permanent magnet machine rotor and stator.
Technique effect of the present invention is: the present invention utilizes blower fan by natural air and is mixed to form according to a certain percentage required low warm air through the cool but air of the cool low temperature but of surface cooler according to motor operating condition and sends into motor gas-gap, form circulation wind path, carry out cooling to rotor and stator, can in air gap, form low temperature separator simultaneously, reduce the heat of stator winding for the impact of rotor permanent magnet, motor permanent magnet working temperature is reduced.For example, when natural air temperature lower (10 DEG C) time quits work cooling system by controller, directly utilize natural wind cooling.Effectively reduce like this working temperature of permanent magnet, improved the impact of ambient temperature on magneto, promote the overall performance of magneto.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is 2m in the present invention
315 DEG C of mixing low temp cold wind of/s regulate figure.
Specific implementation method
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Referring to Fig. 1, the present invention includes the cool but device 1 of low temperature, blower fan 2, magneto 6, the cool but device 1 of low temperature provides low temperature cool wind, blower fan 2 is mixed to form Cryogenic air by natural air with through the cool but air of the cool low temperature but of the cool but device 1 of low temperature, and Cryogenic air is sent into magneto air gap 4 form circulation wind path, Cryogenic air is carried out cooling to permanent magnet motor stator 3 and permanent magnet machine rotor 5.
Blower fan 2 mixes by formula below according to motor operating condition in proportion by natural air with through the cooling cool but air of low temperature of the cool but device 1 of low temperature:
q
1(T
1-T
3)＝q
2(T
3-T
2)
Q in above formula
1for natural air flow, q
2for sub-cooled air mass flow, T
1for natural air temperature, T
2for sub-cooled air themperature, T
3for mixed cryogenic temperature.
With reference to Fig. 2, for example, when the flow of natural air is 1m
3when/s temperature is 25 DEG C, be 2m if will form flow
3/ s temperature is the mixing low temp wind of 15 DEG C, and the flow of cooling air should be 1m
3/ s temperature should be 5 DEG C; When the flow of natural air is 1m
3when/s temperature is 40 DEG C, be 2m if will form flow
3/ s temperature is the mixing low temp wind of 15 DEG C, and the flow of cooling air should be 1m
3/ s temperature should be-10 DEG C.After needed mixing low temp wind forms, send into motor gas-gap, form circulation wind path, carry out cooling to rotor and stator, can in air gap, form low temperature separator simultaneously, reduce the heat of stator winding for the impact of rotor permanent magnet, make motor permanent magnet working temperature to be reduced to 50 DEG C of left and right from 110 DEG C of left and right that adopt traditional type of cooling, actual temp value can be selected in conjunction with actual conditions.For example, by controller, cool air circulating system is quit work when natural air temperature lower (10 DEG C), directly utilize natural air cooling.
Claims (3)
1. a wind cooling temperature lowering method for magneto, comprises the following steps: blower fan is mixed to form Cryogenic air by natural air with through the cool but air proportion of the cool low temperature but of the cool but device of low temperature, Cryogenic air is sent into the working temperature of motor gas-gap reduction permanent magnet.
2. according to the wind cooling temperature lowering method of the magneto described in claims 1, the cool but air of described natural air and low temperature mixes in the given ratio of following formula:
q
1(T
1-T
3)＝q
2(T
3-T
2)
Q in above formula
1for natural air flow, q
2for sub-cooled air mass flow, T
1for natural air temperature, T
2for sub-cooled air themperature, T
3for mixed low-temperature cold wind temperature.
3. the Wind cooling temperature reducing device of a magneto, it is characterized in that: comprise the cool but device of low temperature, blower fan, magneto, the cool but device of low temperature provides low temperature cool wind, blower fan is mixed to form Cryogenic air by natural air with through the cool but air of the cool low temperature but of the cool but device of low temperature by a certain percentage according to actual operating mode, and Cryogenic air is sent into magneto air gap formation circulation wind path, rotor and the stator of Cryogenic air to magneto carries out cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333509.8A CN104052195A (en) | 2014-07-14 | 2014-07-14 | Air cooling method and device of permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333509.8A CN104052195A (en) | 2014-07-14 | 2014-07-14 | Air cooling method and device of permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104052195A true CN104052195A (en) | 2014-09-17 |
Family
ID=51504698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410333509.8A Pending CN104052195A (en) | 2014-07-14 | 2014-07-14 | Air cooling method and device of permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104052195A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130540A (en) * | 2011-03-11 | 2011-07-20 | 华小平 | Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator |
| CN102751817A (en) * | 2012-06-15 | 2012-10-24 | 陈震 | Supplementary cooling device and supplementary cooling method of air-cooling power generator |
| CN103475156A (en) * | 2012-06-06 | 2013-12-25 | 襄阳南车电机技术有限公司 | Cool-air cooling system for traction motor |
-
2014
- 2014-07-14 CN CN201410333509.8A patent/CN104052195A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130540A (en) * | 2011-03-11 | 2011-07-20 | 华小平 | Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator |
| CN103475156A (en) * | 2012-06-06 | 2013-12-25 | 襄阳南车电机技术有限公司 | Cool-air cooling system for traction motor |
| CN102751817A (en) * | 2012-06-15 | 2012-10-24 | 陈震 | Supplementary cooling device and supplementary cooling method of air-cooling power generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |