CN102843009A - Rotor punching sheet of double-squirrel-cage induction motor - Google Patents
Rotor punching sheet of double-squirrel-cage induction motor Download PDFInfo
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- CN102843009A CN102843009A CN2012103753070A CN201210375307A CN102843009A CN 102843009 A CN102843009 A CN 102843009A CN 2012103753070 A CN2012103753070 A CN 2012103753070A CN 201210375307 A CN201210375307 A CN 201210375307A CN 102843009 A CN102843009 A CN 102843009A
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- cage
- squirrel
- rotor punching
- starting
- punching sheet
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Abstract
The invention relates to a rotor punching sheet of a double-squirrel-cage induction motor. The rotor punching sheet comprises a rotor punching sheet body, and is characterized in that: a starting squirrel-cage groove and a working squirrel-cage groove are punched in the rotor punching sheet body; an upper squirrel-cage guide strip and a lower squirrel-cage guide strip are placed into the starting squirrel-cage groove and the working squirrel-cage groove respectively, so that two sets of mutually independent upper and lower squirrel-cage windings are constructed; the upper squirrel-cage winding is generally made of high-electric-resistivity materials such as brass, or aluminum and bronze; and the lower squirrel-cage winding is made of a red copper material. The rotor punching sheet is simple, compact and reasonable in structure; because the rotor punching sheet is designed with a double-squirrel-cage structure, a remarkable acting effect is achieved; and under the condition of ensuring that the magnetic performance characteristic of the motor is qualified, the starting performance and the working performance are improved by using a motor skin effect by means of changing the shape of a rotor groove. Due to the adoption of the rotor punching sheet, the starting torque can be increased, and the starting current can be reduced.
Description
Technical field
The present invention relates to a kind of rotor punching of double-squirrel cage induction motor, be mainly used in and improve excellent start performance and service behaviour.
Background technology
Motor is the device that converts electric energy to mechanical energy, is widely used in the modern various machinery as drive source.Three phase induction motor particularly, it have simple in structure, be easy to many advantages such as control, efficient height and power are big.The major defect of three phase induction motor is that starting current is big, and starting torque is little.Need increase starting torque during the induction motor starting, reduce starting current, need rotor resistance big in the actual use, but, need rotor resistance little during design in order to raise the efficiency.During normal operation, be difficult to accomplish for Wound induction motor, therefore, need the cage modle motor of special rotor structure, two cage induction motors are 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 to improve the rotor punching of double-squirrel cage induction motor of starting performance and the service behaviour of motor thereby provide a kind of.
According to technical scheme provided by the invention; The rotor punching of two cage induction motors; Comprise the rotor punching body; Characteristic is: punching out starting cage slot and work cage slot on the said rotor punching body, last cage sliver is put into starting cage slot and work cage slot respectively with following cage sliver, constitutes two covers cage modle winding up and down.
As further improvement of the present invention, the said cage modle winding of going up adopts brass or aluminium, the higher material of bronze constant resistance rate to process usually; Following cage modle winding adopts the red copper material to process.
As further improvement of the present invention, said two covers up and down cage modle winding are separate or have a public end ring.
Compared with present technology the present invention has the following advantages:
The present invention is simple, compact and reasonable for structure; Because rotor punching is designed to two basket structures, and action effect is obvious; Guaranteeing through changing rotor slot shape, to utilize the motor kelvin effect to improve starting performance and service behaviour under the motor magnetic property characteristic acceptance condition; To the almost not influence of punching electromagnetic performance, can increase starting torque, reduce starting current.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Following the present invention will combine the embodiment in the accompanying drawing to further describe:
As shown in Figure 1; Comprise rotor punching body 1, starting cage slot 2, last cage sliver 3, work cage slot 4, following cage sliver 5; Punching out starting cage slot 2 and work cage slot 4 on the said rotor punching body 1, last cage sliver 3 is put into starting cage slot 2 and work cage slot 4 respectively with following cage sliver 5, constitutes the separate winding of cage modle up and down of two covers; The cage modle winding both can be separate up and down, again public end ring can be arranged.
Rotor punching body of the present invention is provided with two cover cage modle windings, and the cage modle winding both can be separate up and down, can also have public end ring.Under same sliver electric current, the leakage flux of following cage modle winding interlinkage is always much more than last cage modle winding, so the leakage reactance of cage modle winding is more much bigger than last cage modle winding down.Last cage modle winding is processed with brass or aluminium, the higher material of bronze constant resistance rate usually, and resistance is bigger; Following cage modle winding sliver sectional area is bigger, and the lower red copper of resistivity commonly used processes, and resistance is less.
When the present invention started, last cage modle winding resistance was big, produced bigger starting torque, was called the starting cage so go up the cage modle winding; During normal the operation, following cage modle winding resistance is little, and electric current mainly concentrates on down the cage modle winding when normally moving, and produces the operation torque of motor, so the cage modle winding is called work cage down.
Owing to rotor punching is designed to two basket structures,, can increases starting torque, reduce starting current to the almost not influence of punching electromagnetic performance.
Claims (4)
1. the rotor punching of a double-squirrel cage induction motor; Comprise rotor punching body (1); It is characterized in that: said rotor punching body (1) is gone up punching out has starting cage slot (2) and work cage slot (4); Said upward cage sliver (3) and following cage sliver (5) place respectively in starting cage slot (2) and the work cage slot (4), constitute two covers cage modle winding up and down.
2. the rotor punching of double-squirrel cage induction motor according to claim 1 is characterized in that: the said cage modle winding of going up adopts brass or aluminium, bronze material to process.
3. the rotor punching of double-squirrel cage induction motor according to claim 1 is characterized in that: said cage modle winding down adopts the red copper material to process.
4. the rotor punching of double-squirrel cage induction motor according to claim 1 is characterized in that: said two covers cage modle winding up and down are separate or have a public end ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103753070A CN102843009A (en) | 2012-09-29 | 2012-09-29 | Rotor punching sheet of double-squirrel-cage induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103753070A CN102843009A (en) | 2012-09-29 | 2012-09-29 | Rotor punching sheet of double-squirrel-cage induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102843009A true CN102843009A (en) | 2012-12-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103753070A Pending CN102843009A (en) | 2012-09-29 | 2012-09-29 | Rotor punching sheet of double-squirrel-cage induction motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102843009A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504809A (en) * | 2019-09-11 | 2019-11-26 | 大连金石泵业有限公司 | A kind of composite construction rotor and motor for canned motor pump |
| TWI806115B (en) * | 2020-09-25 | 2023-06-21 | 日商日立產機系統股份有限公司 | Rotor, cage induction motor and drive system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB183612A (en) * | 1921-05-06 | 1922-08-03 | Dewhurst & Partner Ltd | Improvements in alternating current motors |
| CN101582615A (en) * | 2009-06-08 | 2009-11-18 | 无锡市中达电机有限公司 | Rotor punching sheet of double-cage induction motor |
| CN201450425U (en) * | 2009-06-08 | 2010-05-05 | 无锡市中达电机有限公司 | Double-cage induction motor rotor sheet |
| CN101867272A (en) * | 2010-06-30 | 2010-10-20 | 无锡哈电电机有限公司 | Rotor iron core of two-cage three-phase asynchronous motor |
-
2012
- 2012-09-29 CN CN2012103753070A patent/CN102843009A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB183612A (en) * | 1921-05-06 | 1922-08-03 | Dewhurst & Partner Ltd | Improvements in alternating current motors |
| CN101582615A (en) * | 2009-06-08 | 2009-11-18 | 无锡市中达电机有限公司 | Rotor punching sheet of double-cage induction motor |
| CN201450425U (en) * | 2009-06-08 | 2010-05-05 | 无锡市中达电机有限公司 | Double-cage induction motor rotor sheet |
| CN101867272A (en) * | 2010-06-30 | 2010-10-20 | 无锡哈电电机有限公司 | Rotor iron core of two-cage three-phase asynchronous motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504809A (en) * | 2019-09-11 | 2019-11-26 | 大连金石泵业有限公司 | A kind of composite construction rotor and motor for canned motor pump |
| TWI806115B (en) * | 2020-09-25 | 2023-06-21 | 日商日立產機系統股份有限公司 | Rotor, cage induction motor and drive system |
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Application publication date: 20121226 |