CN2376134Y - Wide voltage high-torque capacitor asynchronous motor - Google Patents
Wide voltage high-torque capacitor asynchronous motor Download PDFInfo
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- CN2376134Y CN2376134Y CN99210234U CN99210234U CN2376134Y CN 2376134 Y CN2376134 Y CN 2376134Y CN 99210234 U CN99210234 U CN 99210234U CN 99210234 U CN99210234 U CN 99210234U CN 2376134 Y CN2376134 Y CN 2376134Y
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- voltage
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- asynchronous motor
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Abstract
The utility model belongs to the motor technical field, and relates to a two-value-capacitor asynchronous motor which accepts continuous or interrupted operation with maintaining rated output power in the occasion of large voltage change ratio of a single-phase source. The utility model is formed by that the existing standard motor changes the internal structure and is additionally provided with an under-voltage protector, which is shown by the attached figure. When voltage is on the low side to a preset value, the two-value-capacitor asynchronous motor can automatically compensate the running capacitance, adjust the current distribution of a main and a secondary windings, maintain heat balance and prevent the windings being burnt out. The utility model has the advantages of high starting torque and overload capacity, reliable operation and all performances reaching the standards, and is suitable for areas with low supply voltage and air conditioners of railway electric locomotives.
Description
The utility model relates to a kind of can acceptance and keeps the continuous or interrupter duty of rated output power under the big occasion of single phase poaer supply voltage change ratio, and has the double value capacitor asynchronous motor than high starting torque and overload capacity.
At present, known double value capacitor asynchronous motor has two cover winding, i.e. main winding and auxiliary winding.Wherein auxiliary winding series capacitor, centrifugal switch are in parallel with main winding then.When motor applied rated voltage, main winding current Im became just becoming increase with load variations, and auxiliary winding electric current I a then becomes contravariant to reduce with load.Usually design of electrical motor is according to rated voltage U
NWith rated power P
NOptimize the electromagnetic load of main winding, reach fully loaded heat balance optimal economic operation, at this moment, the rated value of main winding current is I
MN, the rated value of auxiliary winding electric current is I
ANIn fact, be not to be under rated voltage, the nominal load current to work most operating position during motor full-load run: on-the-spot mains voltage variations rate exceeds 95%～105%U of GB GB755
NRegulation, especially remote mountain area voltage ripple of power network scope reaches 80%～110%U
N, the power transmission network voltage change ratio of railway electric locomotive reaches 76%～116%U
NFacts have proved: motor moves under the supply voltage that fluctuates widely, and will be harmful to the reliability and the economy of motor.According to test: when single phase poaer supply voltage rises to 110%U
NDuring operation, main winding current rises to rated value 115%～120%I
MN, auxiliary winding current increases to 120%～125%I
AN, winding temperature rise increases 1.25～1.3 times.For the motor that margin of temperature rise is arranged, the temperature rise under rated voltage during full-load run is generally 50～60K, when voltage is increased to 110%U
NDuring operation, winding temperature rise can reach 70～80K, still can use; Only, be low to moderate 80%U when the single phase poaer supply voltage drop
NThe time, the main winding current 150%～170%I that will uprush
MN, and the auxiliary winding electric current will reduce to 25%～30%I on the contrary
AN, at this moment the unbalanced situation of major-minor winding heat load will appear, because the main winding heat load is overweight, impel fast the increasing of temperature rise to reach 1.5～2.0 times, cause that severe overheated being easy to of winding burnt.Because supply voltage is low excessively, and torque descends with voltage squared, causes the motor starting difficulty, overload capacity weakening causes electric motor fails simultaneously.So current standard product YL series double value capacitor asynchronous motor more and more is out of favour, and should improve the function of product as early as possible, adapts to the national conditions needs.
The purpose of this utility model provides a kind of wide voltage high torque (HT) double value capacitor asynchronous motor, it can not only be under the bigger occasion of mains voltage variations rate reliably working, and under low-voltage, have sufficiently high torque when starting or overload.
The purpose of this utility model is achieved in that the casing that utilizes existing standardized product YL series or y series motor, the stator core of interior dress band winding, cage rotor, centrifugal switch, active block set, outer setting capacitor, terminal box, fan and fan housing.Its architectural feature:
(1). stator core is a front-end offset to fan end.The degree of depth lengthening of front end housing, the front end of stator winding is stretched and is goed deep in the front end housing.
(2). the bearing of front end housing is lower one grade than rear end cap bearing.Centrifugal switch is installed on the interior pillar of front end housing, and active block set is installed on the protracting of rotor shaft.
(3). adopt the under-voltage protection device, compensate the operation capacitance of auxiliary winding circuit automatically, change the major-minor winding current and distribute the maintaining heat balance.Two kinds of structural shapes are arranged:
First kind: stretch the position at the stator winding end and imbed thermal protector, its normal opened contact is connected electrically in additional operation capacitor and the auxiliary winding circuit.When motor is in subnormal voltage operation, overheated because of winding, when surpassing predetermined value, temperature automatically connects the additional circuit that moves capacitor, the deficiency of the capacitance of compensation operation in time.Because the auxiliary winding capacitance increases, capacitive reactance reduces, the then corresponding rising of auxiliary winding electric current, and the corresponding reduction of main winding current is played the thermally equilibrated effect of automatic adjusting major-minor winding, thereby is made the main winding temperature rise be reduced to normal temperature in real time.
Second kind: connect under-voltage replay at voltage input end, its contact is connected electrically in additional operation capacitor and the auxiliary winding circuit.When supply voltage was lower than predetermined value, under-voltage replay was connected the circuit of additional operation capacitor automatically, and the deficiency of compensation auxiliary winding capacitance plays the thermally equilibrated effect of automatic adjusting major-minor winding equally, in time reduces the temperature rise of main winding.
Owing to adopt such scheme, make double value capacitor asynchronous motor can be adapted to normal reliable operation under the condition that supply voltage changes significantly, every performance index all produce a desired effect.
Figure below further specifies the utility model in conjunction with the accompanying drawings and embodiments:
Fig. 1 is a structure principle chart of the present utility model.
Fig. 2 adopts the thermal protector formula to regulate the circuit diagram of operation capacitance.
Fig. 3 adopts the under-voltage replay formula to regulate the circuit diagram of operation capacitance.
Among the figure: 1. rear end cap 2. rear end wavy spring sheets 3. rear end ball bearings 4. supports 5. are with the coil of winding stator core 6. cage rotors 7. start capapcitors 8. operation capacitors 9. additional operation capacitor 10. active block set 11. centrifugal switches 12. drive end bearing brackets 13. front end ball bearings 14. front end wavy spring sheets 15. fans 16. fan housings 17. terminal boxes 18. braces 19. main windings 20. auxiliary winding 21. thermal protectors 22. under-voltage replay contacts 23. under-voltage replays.
Expression motor outage inactive state in Fig. 1.Band winding stator core 5 in its shell, it is not placed in the middle to be fixed on support 4, and the iron core of deflection reach and cage rotor 6 aligns.The contact of centrifugal switch 11 bears the pressure of active block set 10, makes its junction closure, and draws two wiring from contact and introduce in the terminal box by the front end groove of stator core.Front end ball bearing 13 and front end wavy spring sheet 14 are packed in the bearing chamber of front end housing 12.Rear end ball bearing 3 and rear end wavy spring sheet 2 are packed in the bearing chamber of rear end cap 1.Front end ball bearing 13 hangs down one grade than rear end ball bearing 3, helps general existing active block set 10, reduces cost.Front end housing 12 is special intensification end caps, and the also corresponding lengthening of fan housing 16 is fastened on three lugs of front end housing 12.Fan 15 selects for use heat proof material to make, and guarantees to be assemblied in long-term work on the axle head, firm stable.
In Fig. 2, the terminal sign and the connection of main winding 19, auxiliary winding 20 and centrifugal switch 11 in the dotted line sash on the expression terminal block.The terminal of main winding is masked as U
1, U
2, the terminal of auxiliary winding is masked as Z
1, Z
2, the centrifugal switch terminal be masked as V
1, V
2The starting capacitance C of outer setting
1Be connected terminal V
2, Z
1On, the operation capacitor C
21Be connected terminal V
1, Z
1On, additional operation capacitor C
22RB is connected in series in V with thermal protector
1, Z
1On the terminal.The connection of diagram brace 18 is that motor is clockwise, and the connection of dotted line brace is for reversing.
In Fig. 3, adopt the contact 22 of under-voltage replay to substitute thermal protector 21.The coil 23 of under-voltage replay is connected to the main winding terminal U of voltage input
1, U
2On.Remainder Fig. 2 is identical with Fig. 3 effect.
Embodiment: rated power 3kW, rated voltage 380V, supply frequency 50Hz, the single phase poaer supply voltage change ratio is a rated value 76%～116%, and synchronous speed is 3000r/min, class of insulation H level, degree of protection IP44, working method is continuous S1 and interrupted S4 duty.Support height of center 100mm, core-diameter 155/ 84/ 36mm, groove cooperates 24/18 groove, starting capacitance amount C
1Be 250 μ F, operation capacitance C
21Be 20 μ F, additional operation capacitance C
22Be 15 μ F.Verify that through model machine every performance is all up to standard, see table 1 for details.Adopt the under-voltage replay formula to regulate the operation capacitance, change the fully loaded operation continuously of S1 system low-voltage 289V into by the S4 system, the main winding temperature rise can be reduced to 92K by 104K, reduces 12K, and effect is obvious.
Table 1
| Product type | YLK100L-2 | Rated power | 3kW | Rated voltage | 380V | 50HZ | |||
| Project | Unit | Technical conditions | Test value | ||||||
| Working method | |||||||||
| The S4 system | The S1 system | The S4 system | The S1 system | The S4 system | The S4 system | ||||
| Terminal voltage | V | 380 | 289 | 380 | 441 | ||||
| Power output | W | 3000 | 3000 | 3000 | 3000 | 3000 | 3000 | ||
| No-load current | A | 1.50 1.25 | 1.90 2.16 | 6.1 6.5 | |||||
| No-load loss | W | 292 250 | 448 420 | 824 804 | |||||
| Starting current | A | 110 | 70 80 | 81 92 | 98 105 | ||||
| Starting torque | Doubly | 2.2 | 2.92 2.82 | 4.00 4.67 | 6.26 5.66 | ||||
| Pull up torque | Doubly | 1.0 | ＞1.0 | - | |||||
| Breakdown torque | Doubly | 1.7 | - | ＞2.1 ＞2.5 | - | ||||
| Fully loaded line current | A | 14.25 | 14.6 14.4 | 10.1 9.9 | 10.1 10.2 | ||||
| Main winding current | A | 11.0 | 13.7 13.6 | 7.6 7.9 | 9.25 9.35 | ||||
| The auxiliary winding electric current | A | 4.3 | 2.7 2.5 | 3.8 3.7 | 4.60 4.65 | ||||
| Efficient | ％ | 79 -3.15 | 77.8 | 76.16 77.37 | 82.79 83.42 | 79.26 79.59 | |||
| Power factor | - | 0.85 -0.02 | 0.9635 | 0.9335 0.9320 | 0.944 0.956 | 0.8498 0.8380 | |||
| Rotating speed | r/ min | 2694 | 2685 2700 | 2856 2865 | 2908.5 2907.9 | ||||
| Temperature rise | Main winding | K | 100 +10 | 92 | 100.0 104.3 | 51.3 45.0 | 53 47 | 58.0 64.7 | |
| Auxiliary winding | 100 +10 | 73 | 79.8 74.5 | 50.5 46.0 | 51.7 45.0 | 54.7 57.7 | |||
| Capacitance | Starting C 1 | μF | 250 | 250 | |||||
| Operation C 21 | 20 | 20 | |||||||
| Additional C 22 | 15 | - | |||||||
Claims (2)
1. one kind wide voltage high torque (HT) double value capacitor asynchronous motor, in its shell by the stator core of band winding, cage rotor, active block set; Shell is outer to be made of capacitor, terminal box, fan and fan housing, it is characterized in that: stator core skew fan end, front end housing are deepened; Preceding end bearing is lower one grade than rear end bearing; Centrifugal switch is installed in the dark lid of front end; Adopt device under proteciton, compensation operation capacitance is adjusted the major-minor winding current and is distributed the maintaining heat balance automatically.
2. wide voltage high torque (HT) double value capacitor asynchronous motor according to claim 1; it is characterized in that: the structure of under-voltage protection device has two kinds: a kind of is to stretch the position at the stator winding end to imbed thermal protector RB, with the terminal V of its normal opened contact 21 with additional operation capacitor 9, terminal block
1, Z
1Be electrically connected; Another kind is that under-voltage replay coil 23 is electrically connected on the sub-U of voltage input end
1, U
2, its normal opened contact 22 and the additional terminal V that moves capacitor 9, terminal block
1, Z
1Be electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99210234U CN2376134Y (en) | 1999-05-17 | 1999-05-17 | Wide voltage high-torque capacitor asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99210234U CN2376134Y (en) | 1999-05-17 | 1999-05-17 | Wide voltage high-torque capacitor asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2376134Y true CN2376134Y (en) | 2000-04-26 |
Family
ID=34003470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99210234U Expired - Fee Related CN2376134Y (en) | 1999-05-17 | 1999-05-17 | Wide voltage high-torque capacitor asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2376134Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976921A (en) * | 2010-08-23 | 2011-02-16 | 上海特波电机有限公司 | Method for improving accuracy of minimum starting torque of single-phase motor |
| CN109831125A (en) * | 2017-11-23 | 2019-05-31 | 浙江富莱欧机电有限公司 | A kind of double value capacitor asynchronous motor low pressure operation power-assisted start-up circuit |
-
1999
- 1999-05-17 CN CN99210234U patent/CN2376134Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976921A (en) * | 2010-08-23 | 2011-02-16 | 上海特波电机有限公司 | Method for improving accuracy of minimum starting torque of single-phase motor |
| CN109831125A (en) * | 2017-11-23 | 2019-05-31 | 浙江富莱欧机电有限公司 | A kind of double value capacitor asynchronous motor low pressure operation power-assisted start-up circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |