CN102684438B - Closed air-cooling permanent magnet synchronous motor and field-weakening speed adjusting method - Google Patents
Closed air-cooling permanent magnet synchronous motor and field-weakening speed adjusting method Download PDFInfo
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- CN102684438B CN102684438B CN201210168336.XA CN201210168336A CN102684438B CN 102684438 B CN102684438 B CN 102684438B CN 201210168336 A CN201210168336 A CN 201210168336A CN 102684438 B CN102684438 B CN 102684438B
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Abstract
The invention relates to a closed air-cooling permanent magnet synchronous motor and a field-weakening speed adjusting method applied to the closed air-cooling permanent magnet synchronous motor. The closed air-cooling permanent magnet synchronous motor comprises a stator and a rotator, vent holes are opened along a peripheral direction of a yoke portion of the stator, the vent holes axially go through a stator core, an upper support and a lower support are arranged on end portions of the stator, the upper support and the lower support are used for sealing a stator winding, and a layer of a sealant is coated and solidified on the surface of the stator winding so that cooling air only cools the stator core and salt mist and moisture on the sea are prevented from eroding the stator winding. The field-weakening speed adjusting method is capable of achieving doubling field-weakening speed adjusting. The closed air-cooling permanent magnet synchronous motor and the field-weakening speed adjusting method are applied to a top drive device, so that the characteristic of high torque density is fully exerted, and the closed air-cooling permanent magnet synchronous motor is wide in speed adjusting range of constant power and good in application prospect.
Description
Technical field
The weak magnetic speed regulating method that the present invention relates to a kind of closed air-cooled permagnetic synchronous motor and be applied to this closed air-cooled permagnetic synchronous motor.
Background technology
In the top drive apparatus being applied in fields such as oil drilling platforms, be mostly to adopt asynchronous machine, the situation that asynchronous machine usually can exist motor performance and top drive apparatus operating mode to misfit, has influence on mining progress and the efficiency of top drive apparatus; In addition, asynchronous machine long term exposure is in rugged environment, can be subject to the erosion of marine salt fog, moisture, directly have influence on the insulation property of asynchronous machine, seriously shortened the useful life of asynchronous machine on top drive apparatus, for this reason, in the urgent need to a kind ofly can meeting top drive apparatus operating mode, the motor with longer insulation life substitutes existing asynchronous machine, yet, be domesticly applied to permagnetic synchronous motor on top drive apparatus almost or blank out.
In existing top drive apparatus, because being subject to the effects limit such as installation space, weight, asynchronous machine need to adopt higher electromagnetic load conventionally, and during operation, heating is comparatively serious, be subject to the impact of marine salt fog, moisture, the life and reliability of motor insulation material is subject to serious test simultaneously.
For the motor that adopts higher electromagnetic load, its type of cooling often adopts two kinds of water-cooled and forced air coolings.The system of motor water cooling is comparatively complicated, and applicable situation is less; And forced air cooling mode structure is comparatively simple, being all widely applied of a lot of occasions.Traditional motor forced air cooling mode Shi Cong external security district air amount, is blown into through motor one end, directly cooled machine winding, then blow out from the motor other end, reach cooling effect.
But in humidity, the adverse circumstances of air with salt fog, airborne moisture and high salt content, can make motor in forced air cooling process, in the time of cooling to motor winding, the insulating barrier of motor is produced and destroyed.When motor quits work, remain on the cooling insulating barrier that is attached to motor winding of meetings such as salt fog on motor, motor insulating layer is caused to very large injury, greatly reduce the useful life of motor.
Different from electric excitation synchronous motor, the rotor-exciting magnetic field of permagnetic synchronous motor immobilizes, back-emf and speed that permanent magnetic field produces are directly proportional, when motor terminal voltage is increased to the maximum voltage that inverter can export with rotating speed after, continue the speed of rising motor, permagnetic synchronous motor cannot remake permanent torque operation.
Summary of the invention
The object of the invention is to propose a kind of closed air-cooled permagnetic synchronous motor, only stator core is carried out to forced air cooling, do not touch motor winding, guarantee at sea in the adverse circumstances such as salt fog, moisture, the insulating barrier of motor can not be affected, and has improved closed air-cooled permagnetic synchronous motor and has born ability and the useful life in adverse circumstances.
To achieve these goals, the technical solution used in the present invention is:
A kind of closed air-cooled permagnetic synchronous motor, comprise stator, rotor, blower fan, end cap and coil the assembly of stopping, coiling the assembly of stopping is fixed on upper end cover, blower fan is bolted on and coils on the assembly of stopping and dispose fan electromotor, stator comprises stator core and stator winding, at stator end, upper and lower stator tooth pressing plate is set respectively, in described stator yoke portion, along the circumferential direction offers several ventilation holes, all ventilation holes axially connect stator core; At stator end, be respectively equipped with upper and lower stator tooth pressing plate is formed to upper bracket and the lower carriage compressing, wherein, the junction of upper bracket and upper stator tooth pressing plate and lower carriage and lower stator tooth pressing plate is inner/outer drum structure, the upper-end part of driving of stator winding is in the inner core inner side of upper bracket, and the lower end part of stator winding is in the inner core inner side of lower carriage; Cavity area between the inner/outer tube of upper bracket forms the inlet chamber of cooling air, inlet chamber is communicated with the aperture, top of ventilation hole, cavity area between the inner/outer tube of lower carriage forms the discharge chamber of cooling air, discharge chamber is communicated with the lower square hole square opening of ventilation hole, along the direction formation cooling air passage of inlet chamber, ventilation hole and discharge chamber; On rotor, be embedded with permanent magnet.
As advantageous embodiment of the present invention, at the surface-coated of stator winding, curing one deck fluid sealant, as layer protective layer, isolation is moist, the environment of salt fog; Between upper bracket and upper stator tooth pressing plate and lower carriage and lower stator tooth pressing plate, be respectively arranged with O shape circle, when lower carriage compresses stator tooth pressing plate in assurance, again stator winding played to sealing function.
As advantageous embodiment of the present invention, described ventilation hole is positioned on two circumference of stator yoke portion, and the ventilation hole on each circumference is uniformly distributed along this circumferencial direction.
In stator yoke, portion offers ventilation hole, stator end is respectively equipped with the upper and lower support that stator winding is formed to sealing, upper bracket and lower carriage compress respectively the upper and lower stator tooth pressing plate of stator end, cooling air can only be flowed along the direction of inlet chamber, ventilation hole and discharge chamber, and can not touch stator winding, can realize cooling to stator winding, rotor employing built-in permanent magnetic body structure due to closed air-cooled permagnetic synchronous motor, rotor generates heat hardly, only need stator winding is cooling.
The present invention also aims to propose a kind of weak magnetic speed regulating method that is applied to above-mentioned closed air-cooled permagnetic synchronous motor, can improve the weak-magnetic speed-regulating range of permagnetic synchronous motor when rated speed is above, realize the weak-magnetic speed-regulating of twice, the technical scheme adopting is:
A weak magnetic speed regulating method for closed air-cooled permagnetic synchronous motor, comprises the following steps:
A regulates output voltage and the output frequency of frequency converter, makes more than PMSM operates in rated speed;
The measured value I1 of b recording ammeter A1, this measured value is unloaded weak magnetoelectricity stream, and calculates the torque current I1p needing under this rotating speed;
C repeating step b, record many groups measured value I1 and torque current I1p, and by the current formula under actual permanent power operating mode
calculate the current value I of PMSM, analyze data, judge whether current value I exceeds the rated current of motor, and then show whether the weak-magnetic speed-regulating performance of motor meets the requirements.
In above-mentioned steps a, frequency converter adopts ABB frequency converter, and ABB frequency converter is electrically connected to PMSM, and ammeter A1 is arranged on the circuit that ABB frequency converter is connected with PMSM.
Advantage of the present invention is: the rotor of closed air-cooled permagnetic synchronous motor adopts built-in permanent magnetic body structure, without excitation loss, rotor does not generate heat substantially, in stator yoke portion, offer and connect the axial ventilation hole of stator core, stator end is respectively equipped with upper bracket and the lower carriage that stator winding is formed to sealing, the surface-coated of stator winding, solidify one deck fluid sealant, make the cooling-air can only be along inlet chamber, the direction of ventilation hole and discharge chamber flows, only cooling to stator core and can not touch stator winding, can be because not being subject to marine salt fog, the erosion of moisture etc. and destroy stator winding.
Application is the weak magnetic speed regulating method on closed air-cooled permagnetic synchronous motor in the present invention, can increase the output torque of motor when rated speed is following, improve weak-magnetic speed-regulating range more than rated speed, improve efficiency and the power factor of permagnetic synchronous motor simultaneously.Closed air-cooled permagnetic synchronous motor in the present invention and weak magnetic speed regulating method are successfully applied on top drive apparatus, can realize the weak-magnetic speed-regulating of twice, the advantage of performance high torque density, there is broad speed adjustable range, the blank of having filled up the domestic top drive apparatus application permagnetic synchronous motor at 300KW～750KW, has good application prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of closed air-cooled permagnetic synchronous motor in invention;
Fig. 2 is the profile of stator core in Fig. 1;
Fig. 3 is the profile of Fig. 1 rotor;
Fig. 4 is the circuit structure diagram that in the present invention, closed air-cooled permagnetic synchronous motor carries out weak-magnetic speed-regulating;
Wherein, 1-stator;
2-rotor;
3-blower fan;
4-coils the assembly of stopping;
5-upper end cover;
6-fan electromotor;
The upper stator tooth pressing plate of 7-;
Stator tooth pressing plate under 8-;
9-upper bracket;
10-lower carriage;
11-inlet chamber;
12-discharge chamber.
Embodiment
Embodiment
In conjunction with shown in Fig. 1 to Fig. 3, a kind of closed air-cooled permagnetic synchronous motor, comprise stator 1, rotor 2, blower fan 3, end cap and coil the assembly 4 of stopping, coiling the assembly of stopping is fixed on upper end cover 5, blower fan 3 is bolted on and coils on the assembly of stopping and dispose fan electromotor 6, stator comprises stator core and stator winding, at stator end, stator tooth pressing plate 7 and lower stator tooth pressing plate 8 is set respectively; In stator 1 yoke portion, along the circumferential direction offer several ventilation holes, all ventilation holes axially run through stator core, are used to form cooling air passage.Stator end is respectively equipped with upper bracket 9 and lower carriage 10, upper bracket 9 is used to form the compression to upper stator tooth pressing plate 7, lower carriage 10 is used to form the compression to lower stator tooth pressing plate 8, wherein, upper bracket and upper stator tooth pressing plate, and the junction of lower carriage and lower stator tooth pressing plate is inner/outer drum structure, by the inner core being nested with and urceolus, formed, the upper-end part of driving of stator winding is in the inner core inner side of upper bracket 9, the lower end part of stator winding is in the inner core inner side of lower carriage 10, stator winding can not be contacted with extraneous cooling air, between the inner/outer tube of upper bracket 9, formed the inlet chamber 11 of cooling air, this inlet chamber is communicated with the aperture, top of ventilation hole, cavity area between the inner/outer tube of lower carriage 10 forms the discharge chamber 12 of cooling air, discharge chamber is communicated with the aperture, below of ventilation hole, along inlet chamber, the direction of ventilation hole and discharge chamber forms cooling air passage, on rotor, be embedded with permanent magnet.
At the surface-coated of stator winding, curing one deck fluid sealant, as layer protective layer, isolation is moist, the environment of salt fog; Between upper bracket 9 and upper stator tooth pressing plate 7 and lower carriage 10 and lower stator tooth pressing plate 8, be respectively arranged with O shape circle, when lower carriage compresses stator tooth pressing plate in assurance, again stator winding played to good sealing function.
Preferably, ventilation hole is positioned on two circumference of stator yoke portion, and the ventilation hole on each circumference is uniformly distributed along this circumferencial direction.
Rotor employing built-in permanent magnetic body structure due to closed air-cooled permagnetic synchronous motor, without excitation loss, rotor does not generate heat substantially, only need carry out cooling to stator winding, in stator yoke portion, offer and connect the axial ventilation hole of stator core, stator end is respectively equipped with upper bracket and the lower carriage that stator winding is formed to sealing, the surface-coated of stator winding, solidify one deck fluid sealant, make the cooling-air can only be along inlet chamber, the direction of ventilation hole and discharge chamber flows, and can not touch stator winding, can be because not being subject to marine salt fog, the erosion of moisture etc. and destroy the insulating barrier of motor, improved the ability that closed air-cooled permagnetic synchronous motor adapts to bad working environments.
Shown in Fig. 4, closed air-cooled permagnetic synchronous motor, by weak-magnetic speed-regulating with expanding governing, for making permagnetic synchronous motor there is broad constant-power speed regulation ability, keep electric current constant, by controlling the leading angle of flow of electric current, make rotating speed reach the rated speed of twice, electromagnetic torque mean value becomes the general of nominal torque, and power remains unchanged substantially, thereby realizes the weak-magnetic speed-regulating ability of twice.
The weak magnetic speed regulating method being applied in the present invention on closed air-cooled permagnetic synchronous motor is: the rated speed of load motor is that 2400rpm, rated power are 600KW, by regulating output voltage and the power output of ABB frequency converter, permagnetic synchronous motor PMSM is moved more than rated speed.Record the measured value I1 of A1, this measured value is unloaded weak magnetoelectricity stream.The torque current I1p that calculating needs under this rotating speed, the electric current under actual permanent power operating mode
Under following operating mode, if I is no more than the rated current of motor all the time, can think that the weak-magnetic speed-regulating performance of motor meets the requirements.
-120% rated speed, rated power
-140% rated speed, rated power
-160% rated speed, rated power
-180% rated speed, rated power
-200% rated speed, rated power
Table 1 is weak-magnetic speed-regulating test data sheet and test result
From table 1 test data analyzer, even while having arrived limiting condition, the electric current I under permanent power operating mode also can not surpass the rated current 274A of motor.Under this operating mode, motor can bear.
The weak magnetic wide ranges of closed air-cooled permagnetic synchronous motor in the present invention, air gap main flux is large, apply motor of the present invention and speed regulating method, output torque in the time of can increasing motor low cruise, weak-magnetic speed-regulating range while improving high-speed cruising has improved efficiency, power factor and the reliability of motor simultaneously.Closed air-cooled permagnetic synchronous motor, successfully apply on top drive apparatus, and realized the weak-magnetic speed-regulating of twice, brought into play the advantage of high torque density, there is again broad Constant-power speed range, fill up the domestic blank that is applied to the permagnetic synchronous motor of top drive apparatus at 300KW～750KW, there is good application prospect.
Certainly, above-described embodiment is not limitation of the present invention, and the present invention is also not limited to above-mentioned giving an example; It should be noted that those skilled in the art is under the instruction of this specification, any distortion of making, variation, change or replacement form, within all should dropping on the scope of specification protection of the present invention, ought to be subject to protection of the present invention.
Claims (2)
1. a closed air-cooled permagnetic synchronous motor, comprise stator, rotor, blower fan, end cap and coil the assembly of stopping, coiling the assembly of stopping is fixed on upper end cover, blower fan is bolted on and coils on the assembly of stopping and dispose fan electromotor, stator comprises stator core and stator winding, at stator end, upper and lower stator tooth pressing plate is set respectively, it is characterized in that: in described stator yoke portion, along the circumferential direction offer several ventilation holes, all ventilation holes axially connect stator core; At stator end, be respectively equipped with upper and lower stator tooth pressing plate is formed to upper bracket and the lower carriage compressing, wherein, the junction of upper bracket and upper stator tooth pressing plate and lower carriage and lower stator tooth pressing plate is inner/outer drum structure, the upper-end part of driving of stator winding is in the inner core inner side of upper bracket, and the lower end part of stator winding is in the inner core inner side of lower carriage; Cavity area between the inner/outer tube of upper bracket forms the inlet chamber of cooling air, inlet chamber is communicated with the aperture, top of ventilation hole, cavity area between the inner/outer tube of lower carriage forms the discharge chamber of cooling air, discharge chamber is communicated with the aperture, below of ventilation hole, along the direction formation cooling air passage of inlet chamber, ventilation hole and discharge chamber; On rotor, be embedded with permanent magnet; At the surface-coated of stator winding, curing one deck fluid sealant; Between upper bracket and upper stator tooth pressing plate and lower carriage and lower stator tooth pressing plate, be respectively arranged with O shape circle; Described ventilation hole is positioned on two circumference of stator yoke portion, and the ventilation hole on each circumference is uniformly distributed along this circumferencial direction.
2. the weak magnetic speed regulating method of a kind of closed air-cooled permagnetic synchronous motor according to claim 1, is characterized in that comprising the steps:
A regulates output voltage and the output frequency of frequency converter, makes more than PMSM operates in rated speed;
The measured value I1 of b recording ammeter A1, this measured value is unloaded weak magnetoelectricity stream, and calculates the torque current I1p needing under this rotating speed;
C repeating step b, record many groups measured value I1 and torque current I1p, and by the current formula under actual permanent power operating mode
calculate the current value I of PMSM, analyze data, judge whether current value I exceeds the rated current of motor, and then show whether the weak-magnetic speed-regulating performance of motor meets the requirements;
In described step a, frequency converter is electrically connected to PMSM, and ammeter A1 is arranged on the circuit that frequency converter is connected with PMSM.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210168336.XA CN102684438B (en) | 2012-05-28 | 2012-05-28 | Closed air-cooling permanent magnet synchronous motor and field-weakening speed adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210168336.XA CN102684438B (en) | 2012-05-28 | 2012-05-28 | Closed air-cooling permanent magnet synchronous motor and field-weakening speed adjusting method |
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| CN102684438A CN102684438A (en) | 2012-09-19 |
| CN102684438B true CN102684438B (en) | 2014-02-26 |
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| CN102983682B (en) * | 2012-12-06 | 2015-02-04 | 青岛海西电机有限公司 | Flame-proof type frequency conversion integrated permanent-magnet synchronous motor |
| CN116404809B (en) * | 2023-05-26 | 2023-10-20 | 河南全新机电设备有限公司 | Fan structure for slow-rotation-speed permanent magnet synchronous motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU609184A1 (en) * | 1973-11-20 | 1978-05-30 | Предприятие П/Я Г-4128 | Synchronous electric generator |
| CN101741198A (en) * | 2010-02-01 | 2010-06-16 | 哈尔滨工业大学 | Forced air cooling high-frequency permanent-magnetism synchronous motor with high power density |
| CN101882850A (en) * | 2010-08-17 | 2010-11-10 | 哈尔滨工业大学 | Permanent magnet synchronous motor with high-power density |
| JP2011064834A (en) * | 2009-09-15 | 2011-03-31 | Ricoh Co Ltd | Image forming device |
| CN202616958U (en) * | 2012-05-28 | 2012-12-19 | 青岛海西电机有限公司 | Enclosed air cooling permanent magnet synchronous motor |
-
2012
- 2012-05-28 CN CN201210168336.XA patent/CN102684438B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU609184A1 (en) * | 1973-11-20 | 1978-05-30 | Предприятие П/Я Г-4128 | Synchronous electric generator |
| JP2011064834A (en) * | 2009-09-15 | 2011-03-31 | Ricoh Co Ltd | Image forming device |
| CN101741198A (en) * | 2010-02-01 | 2010-06-16 | 哈尔滨工业大学 | Forced air cooling high-frequency permanent-magnetism synchronous motor with high power density |
| CN101882850A (en) * | 2010-08-17 | 2010-11-10 | 哈尔滨工业大学 | Permanent magnet synchronous motor with high-power density |
| CN202616958U (en) * | 2012-05-28 | 2012-12-19 | 青岛海西电机有限公司 | Enclosed air cooling permanent magnet synchronous motor |
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Effective date of registration: 20191225 Address after: Room 2-801, No. 10, Changjiang East Road, Qingdao Economic and Technological Development Zone, Shandong Province Patentee after: Qingdao Haixi Electric Co., Ltd. Address before: 266555 No. 10 Changjiang East Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: Qingdao Haixi Electric Machine Co., Ltd. |
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