CN1633011A - A refrigerating compressor - Google Patents
A refrigerating compressor Download PDFInfo
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- CN1633011A CN1633011A CN 200410052016 CN200410052016A CN1633011A CN 1633011 A CN1633011 A CN 1633011A CN 200410052016 CN200410052016 CN 200410052016 CN 200410052016 A CN200410052016 A CN 200410052016A CN 1633011 A CN1633011 A CN 1633011A
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- radial distance
- magnetic pole
- utmost point
- motor
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Abstract
A cooling compressor is set with a permanent magnetic brushless DC motor, a compression pump is connected with the motor drive shaft, in which, the motor and the compression pump are sealed in a same shell characterizing that the radial distance of the radius outer edge middle of the magnetic poles of the motor rotator is greater than that from the cycle to the both side edges.
Description
Technical field
The invention belongs to a kind of compressor that is used for refrigeration plants such as refrigerator, air-conditioning.
Background technology
Each unit utmost point magnetic pole outer rim radius of rotor of existing refrigeration compressor motor equates everywhere, being rotor equates with air gap radial distance between the stator, particularly concerning the groove motor is arranged, because stator winding is arranged in the groove of stator core, the stator inner loop face forms some inwardly protruded groove teeth, rotor is in rotary course, when every group of opposite polarity adjacent cells utmost point magnetic pole interface bit period skims over each groove tooth, because the change suddenly of teeth groove magnetic resistance, can cause the pulsation of operating current, thereby compressor operating moment is fluctuateed, produce vibration and noise, also can influence the startup of compressor sometimes.
Summary of the invention
The present invention is intended to overcome above-mentioned deficiency, provides a kind of torque fluctuations little, easily starting, the refrigerant compressor that vibrating noise is little.
The technical scheme that addresses the above problem is (referring to implementing illustration): the present invention is provided with brushless, permanently excited direct current motor (7), the compression pump (8) that is in transmission connection with motor drive shaft (2), motor and compression pump are sealed in the same housing (11), it is characterized in that: the radial distance at each unit utmost point magnetic pole (5,14) radially outer edge middle part of the rotor of described motor is greater than the radial distance of circumferential both sides outer rim.
Each unit utmost point magnetic pole (5 of the present invention, 14) air gap between radially outer edge both sides and stator is greater than the air gap at middle part, and both sides are positions that adjacent pole has a common boundary, the increasing of this position air gap can make its changes of magnetic field gradient to the stator slot tooth reduce, thereby can reduce the pulsation of electric current, the work torque fluctuations of compressor is reduced, be easier to start, and reduce vibrating noise, also can play the effect of improving its startability for slotless electric machines.
Description of drawings
Fig. 1, the embodiment of the invention 1 overall structure schematic diagram
The cross-sectional view of the no pole shoe brushless, permanently excited direct current motor 7 that Fig. 2, embodiment 1 adopt
Fig. 3, Fig. 2 rotor magnetic pole part structure for amplifying schematic diagram
Fig. 4, embodiment 2 adopts pole shoe brushless, permanently excited direct current motor cross-sectional view
Fig. 5, rotor magnetic pole part structure for amplifying schematic diagram embodiment illustrated in fig. 4
1-stator winding 2-driving shaft 3-stator core 4-rotor core 5-rotor magnetic steel
6-stainless steel sleeve 7-motor 8-compression pump 9-reservoir 10-termination rack
11-housing 12-groove tooth 13-air gap 14-pole shoe 15-tangential magnet-steel
Embodiment
This example is for being used for the refrigerant compressor of air conditioner, and what compression pump 8 adopted is the rotation compression pump, is in transmission connection with motor 7, and the reservoir 9 of band suction pipe is communicated with compression pump, and rotation compression pump and motor 7 are sealed in the housing 11 of band discharge pipe jointly.
The permanent magnet brushless electromotor that is adopted comprises driving shaft 2, be fixed on the rotor core 4 on the driving shaft, be contained in rotor core outer watt shape rotor magnetic steel 5, stator core 3, be embedded in the threephase stator winding 1 in the stator core slot, leave air gap 13 between stator and the rotor, watt shape rotor magnetic steel 5 is outer to be surrounded by the stainless steel sleeve 6 that itself and rotor core 4 is fixed in one, it is radial oriented anisotropic ferrite permanent-magnet or Nd-Fe-B permanent magnetic that watt shape rotor magnetic steel adopts magnetizing direction, and three-phase stator winding links to each other with the DC frequency-changing circuit.
This routine unit utmost point magnetic pole is made up of the tile-shaped magnet steel 5 that fixedly is connected as a single entity with rotor core 4, be arranged with six watts of shape rotor magnetic steels on the rotor magnetic steel, form six unit utmost point magnetic poles, the radial distance at each unit utmost point magnetic pole outer rim middle part is all greater than the radial distance of circumferential both sides.
Referring to Fig. 3, (6-pole motor) unit utmost point magnetic pole cross section radially outer edge is to be arc H and the identical smooth curve that connects to form of monosymmetric arc H1, H2 of R by the middle part radius, the radial distance R1 of curve two-end-point, R2 value be less than the radial distance R of centre arc, thereby make air gap 13 between utmost point magnetic pole radial outer rim middle part, unit and the stator less than the air gap of both sides.
This structure is equally applicable to the brushless, permanently excited direct current motor of 2 utmost points, 4 utmost points, 8 utmost points
This example is the compressor that is used for refrigerator, and the compression pump that is connected with electric-motor drive is the piston compression pump, and motor is for there being the pole shoe brushless, permanently excited direct current motor, and Fig. 4 is the cross-sectional view of this motor.
This routine stator winding 1 is embedded in the groove of stator core, unit utmost point magnetic pole is made up of adjacent two tangential magnet-steels 15 and the high magnetic conduction mild steel pole shoe 14 that is contained between the magnet steel termination, referring to Fig. 5, the radial air gap at pole shoe radially outer edge middle part is less than the radial air gap of circumferential both sides outer rim, unit utmost point magnetic pole pole shoe cross section radially outer edge is to be the slick and sly curve that coincide and connect to form of the arc G of L and monosymmetric arc G1, G2 by the middle part radius, and the radial distance L1 of curve two-end-point, L2 value are less than the radial distance L of centre arc.
Above-mentioned two routine unit utmost point magnetic pole cross section outer marginal circumferences are symmetry to the radial distance of both sides and dwindle, concerning two-way electric rotating machine, rotating all can play reduce torque fluctuations, improve startability effect.
Unit utmost point magnetic pole cross section outer marginal circumference can asymmetricly be provided with to both sides concerning unidirectional electric rotating machine, radial distance facing to direction of rotation one side can be greater than the radial distance of opposite side, promptly facing to the air gap of the direction of rotation one side air gap less than opposite side, the air gap at outer rim middle part is then less than the air gap of both sides.
During design cell utmost point magnetic pole cross section outer rim curve, can design according to power of electric motor, generally speaking, power of motor is more little, the ratio of unit rotor magnetic pole outer rim centre radial distance and circumferential both sides outer rim radial distance just should be big more, promptly the air gap of both sides should be more greater than the air gap in centre.
Claims (5)
1, a kind of refrigerant compressor, be provided with brushless, permanently excited direct current motor (7), the compression pump (8) that is in transmission connection with motor drive shaft (2), motor and compression pump are sealed in the same housing (11), it is characterized in that: the radial distance at each unit utmost point magnetic pole (5,14) radially outer edge middle part of the rotor of described motor is greater than the radial distance of circumferential both sides outer rim.
2, refrigerant compressor according to claim 1, it is characterized in that: described unit utmost point magnetic pole is made up of the tile-shaped magnet steel (5) that fixedly is connected as a single entity with rotor core (4), unit utmost point magnetic pole cross section radially outer edge is that the radial distance of curve two-end-point (R1), (R2) are worth the radial distance (R) less than the centre arc by the arc (H) and monosymmetric arc (H1), (H2) identical smooth curve that connects to form of middle part radius for (R).
3, refrigerant compressor according to claim 1, it is characterized in that: described unit utmost point magnetic pole is made up of adjacent two tangential magnet-steels (15) and the high magnetic conduction mild steel pole shoe (14) that is contained between the magnet steel termination, unit utmost point magnetic pole pole shoe cross section radially outer edge is that the radial distance of curve two-end-point (L1), (L2) are worth the radial distance (L) less than the centre arc by the arc (G) and monosymmetric arc (G1), (G2) slick and sly curve that coincide and connect to form of middle part radius for (L).
4, according to claim 1,2 or 3 described refrigerant compressors, it is characterized in that: the radially square of described unit utmost point magnetic pole cross section outer marginal circumference to both sides dwindles from symmetry.
5, according to claim 1,2 or 3 described refrigerant compressors, it is characterized in that: described unit utmost point magnetic pole cross section outer rim faces toward the radial distance of the radial distance of direction of rotation one side greater than opposite side, promptly facing to the air gap of the direction of rotation one side air gap less than opposite side, the air gap at outer rim middle part is then less than the air gap of both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410052016 CN1292528C (en) | 2004-11-02 | 2004-11-02 | A refrigerating compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410052016 CN1292528C (en) | 2004-11-02 | 2004-11-02 | A refrigerating compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1633011A true CN1633011A (en) | 2005-06-29 |
| CN1292528C CN1292528C (en) | 2006-12-27 |
Family
ID=34846098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410052016 Expired - Fee Related CN1292528C (en) | 2004-11-02 | 2004-11-02 | A refrigerating compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1292528C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510143A (en) * | 2011-11-10 | 2012-06-20 | 田植华 | Permanent-magnet motor or permanent-magnet generator |
| CN109863670A (en) * | 2016-11-03 | 2019-06-07 | 阿特拉斯·科普柯空气动力股份有限公司 | Water jet compressor set for the actuator and outfit of the compressor element actuator |
-
2004
- 2004-11-02 CN CN 200410052016 patent/CN1292528C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510143A (en) * | 2011-11-10 | 2012-06-20 | 田植华 | Permanent-magnet motor or permanent-magnet generator |
| CN109863670A (en) * | 2016-11-03 | 2019-06-07 | 阿特拉斯·科普柯空气动力股份有限公司 | Water jet compressor set for the actuator and outfit of the compressor element actuator |
| CN109863670B (en) * | 2016-11-03 | 2022-02-18 | 阿特拉斯·科普柯空气动力股份有限公司 | Actuator for a compressor element and water-jet compressor device equipped with such an actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1292528C (en) | 2006-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20061227 Termination date: 20111102 |