CN101582603A - Rotor punching sheet of deep-groove induction motor - Google Patents
Rotor punching sheet of deep-groove induction motor Download PDFInfo
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- CN101582603A CN101582603A CNA2009100327845A CN200910032784A CN101582603A CN 101582603 A CN101582603 A CN 101582603A CN A2009100327845 A CNA2009100327845 A CN A2009100327845A CN 200910032784 A CN200910032784 A CN 200910032784A CN 101582603 A CN101582603 A CN 101582603A
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- rotor
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- deep
- punching sheet
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Abstract
The invention relates to a rotor punching sheet of a deep-groove induction motor, which comprises a rotor conducting bar and a rotor punching sheet, and is characterized in that the rotor punching sheet is punched with a rotor groove, and the rotor conducting bar is put into the rotor groove. The rotor groove is a rectangular groove. The structure of the rotor punching sheet is simple, compact and reasonable; and under the situation of not changing a structural material and under the condition of ensuring the qualified magnetic property of the motor, by changing the shape of the rotor groove and using the skin effect of the current caused by the flux leakage of the rotor groove in the conducting bar, the starting current is concentrated at the upper part, equivalently the effective section is small, the effective resistance is large and the power factor is increased, so that the starting current of the motor is reduced, the starting moment is increased, and the starting performance can be improved. During normal work, because the loop frequency of a rotor is low, the skin effect is extremely small, equivalently the effective section of the conducting bar in the deep groove is increased, the effective resistance is reduced, and the working performance can be improved.
Description
Technical field
The present invention relates to the rotor punching of deep-groove induction motor, be mainly used in and improve excellent start performance and service behaviour.
Background technology
Usually the three phase induction motor service behaviour need be calculated rating data, i.e. rated current, rated power factor, rated efficiency, rated slip, and starting performance need be calculated starting torque multiple, breakdown torque multiple and starting current times.We wished to increase starting torque, reduced starting current induction motor when starting, wish during design rotor resistance bigger for well, but in order to raise the efficiency, wish during design that rotor resistance is smaller for well.During normal operation, for Wound induction motor, this point is not difficult to accomplish, but general induction machine is difficult to accomplish, therefore, needs the cage modle motor of special rotor structure, and deep-groove induction motor is exactly wherein a kind of.
The starting method of general induction motor has two kinds:
1, across-the-line starting.Across-the-line starting utilizes knife switch or contactor that motor is directly received on the rated power supply exactly.Though this starting method is simple, because starting current is bigger, line voltage distribution will be descended, influence the operate as normal of load.Generally have only the asynchronous motor of power below twenty or thirty kilowatt could adopt the method for across-the-line starting to start.And do not adopt across-the-line starting usually for the bigger asynchronous motor of power.
2, reduced voltage starting.Reduced voltage starting is exactly when motor starting, reduces its added voltage.Its purpose will reduce starting current exactly.Voltage has descended 1/3 times, and electric current has descended 1/3,1/3 when starting torque also is reduced to across-the-line starting.Start when therefore, this method only is suitable for zero load or underloading.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, guaranteeing under the motor magnetic property characteristic acceptance condition, utilize the motor kelvin effect can improve the rotor punching of the deep-groove induction motor of the starting performance of motor and service behaviour thereby provide a kind of.
According to technical scheme provided by the invention, the rotor punching of deep-groove induction motor comprises rotor bar, rotor punching, and feature is: punching out rotor on the described rotor punching, rotor bar is put into rotor.
The ratio of described rotor groove depth and groove width is 10～12: between 1, the rotor slot shape width should be not less than 4mm.
Compared with the prior art the present invention has the following advantages:
The present invention is simple, compact and reasonable for structure; Under the situation that does not change structural material, guaranteeing under the motor magnetic property characteristic acceptance condition, by changing rotor slot shape, utilize rotor leakage field caused electric current kelvin effect in sliver, make starting current concentrate on top, it is little to be equivalent to effective cross-section, effective resistance is big, and power factor increases, and the result is that the starting current of motor reduces, starting torque increases, and improves starting performance.During operate as normal, because the rotor loop frequency is low, kelvin effect is minimum, and sliver is equivalent to the effective cross-section increase in the deep trouth, and effective resistance reduces, and improves service behaviour.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
As shown in Figure 1, comprise rotor 1, rotor bar 2, rotor punching 3.
The present invention adopts punching out 1 rotor slot shape on rotor punching 3, and rotor bar 2 is put into the good rotor slot shape of punching out 1.
Adopt punching out rotor slot shape as shown in Figure 1 on the rotor punching, rotor bar is put into wherein, rotor slot shape width b should be not less than 4mm, and the ratio of rotor groove depth and groove width is 10～12: between 1.
The present invention adopts rotor punching is designed to deep groove structure, and to the almost not influence of punching electromagnetic performance, the increase starting torque that is obtained, the effect that reduces starting current are obvious.
Claims (3)
1, a kind of rotor punching of deep-groove induction motor comprises rotor bar (2), rotor punching (3), it is characterized in that: described rotor punching (3) is gone up punching out rotor (1), and rotor bar (2) is put into rotor (1).
2, the rotor punching of deep-groove induction motor according to claim 1 is characterized in that described rotor (1) is rectangular slot.
3, the rotor punching of deep-groove induction motor according to claim 1 is characterized in that described rotor width b is not less than 4mm, the ratio 10～12 of described rotor punching groove depth and groove width: between 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100327845A CN101582603A (en) | 2009-06-08 | 2009-06-08 | Rotor punching sheet of deep-groove induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100327845A CN101582603A (en) | 2009-06-08 | 2009-06-08 | Rotor punching sheet of deep-groove induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101582603A true CN101582603A (en) | 2009-11-18 |
Family
ID=41364617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100327845A Pending CN101582603A (en) | 2009-06-08 | 2009-06-08 | Rotor punching sheet of deep-groove induction motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101582603A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843010A (en) * | 2012-09-29 | 2012-12-26 | 无锡市中达电机有限公司 | Rotor punching sheet of deep-groove induction motor |
-
2009
- 2009-06-08 CN CNA2009100327845A patent/CN101582603A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843010A (en) * | 2012-09-29 | 2012-12-26 | 无锡市中达电机有限公司 | Rotor punching sheet of deep-groove induction motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20091118 |