CN201450426U - Deep-slot induction motor rotor sheet - Google Patents
Deep-slot induction motor rotor sheet Download PDFInfo
- Publication number
- CN201450426U CN201450426U CN2009200429011U CN200920042901U CN201450426U CN 201450426 U CN201450426 U CN 201450426U CN 2009200429011 U CN2009200429011 U CN 2009200429011U CN 200920042901 U CN200920042901 U CN 200920042901U CN 201450426 U CN201450426 U CN 201450426U
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- rotor
- slot
- starting
- deep
- induction motor
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- Expired - Fee Related
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Abstract
The utility model relates to a deep-slot induction motor rotor sheet, which comprises a rotor bar and a rotor sheet. The utility model is characterized in that a rotor slot is punched on the rotor sheet and the rotor bar is placed in the rotor slot. The rotor slot is a rectangular slot. The utility model has the advantage that the structure is simple, compact and reasonable. On the premise that the structural material is not changed and the magnetic performance of the motor is ensured acceptable, through changing the shape of the rotor slot and utilizing the current skin effect produced by the flux leakage of the rotator slot in the rotor bar to enable the starting current to be concentrated at the upper part, the effective cross section is small, the effective resistance is large, the power factor is increased, and thereby the starting current of the motor is reduced, the starting toque is increased and the starting performance is improved. When in normal operation, since the rotor loop frequency is low and the skin effect is very small, the effective cross section of the rotor bar in the deep slot is increased, the effective resistance is reduced and the working performance is improved.
Description
Technical field
The utility model relates to the rotor punching of deep-groove induction motor, is mainly used in to 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 purpose of this utility model is to overcome above-mentioned weak point, is guaranteeing under the motor magnetic property characteristic acceptance condition thereby provide a kind of, utilizes the motor kelvin effect can improve the rotor punching of the deep-groove induction motor of the starting performance of motor and service behaviour.
According to the technical scheme that the utility model provides, 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 utility model has the following advantages:
The utility model 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 the utility model structural representation.
Embodiment
Embodiment during following the utility model is incited 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 utility model 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 utility model 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. the rotor punching of a 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 |
|---|---|---|---|
| CN2009200429011U CN201450426U (en) | 2009-06-08 | 2009-06-08 | Deep-slot induction motor rotor sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200429011U CN201450426U (en) | 2009-06-08 | 2009-06-08 | Deep-slot induction motor rotor sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201450426U true CN201450426U (en) | 2010-05-05 |
Family
ID=42555149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200429011U Expired - Fee Related CN201450426U (en) | 2009-06-08 | 2009-06-08 | Deep-slot induction motor rotor sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201450426U (en) |
Cited By (2)
| 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 |
| CN103166343A (en) * | 2011-12-09 | 2013-06-19 | 安徽明腾永磁机电设备有限公司 | Rotor sheet and rotor for permanent magnet motor |
-
2009
- 2009-06-08 CN CN2009200429011U patent/CN201450426U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166343A (en) * | 2011-12-09 | 2013-06-19 | 安徽明腾永磁机电设备有限公司 | Rotor sheet and rotor for permanent magnet motor |
| CN103166343B (en) * | 2011-12-09 | 2015-12-16 | 安徽明腾永磁机电设备有限公司 | For rotor punching and the rotor of permanent magnet motor |
| 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 |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20100608 |