CN101320925B - Low-voltage high power multi-branch permanent magnet synchronous motor - Google Patents
Low-voltage high power multi-branch permanent magnet synchronous motor Download PDFInfo
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- CN101320925B CN101320925B CN2008100109206A CN200810010920A CN101320925B CN 101320925 B CN101320925 B CN 101320925B CN 2008100109206 A CN2008100109206 A CN 2008100109206A CN 200810010920 A CN200810010920 A CN 200810010920A CN 101320925 B CN101320925 B CN 101320925B
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Abstract
A low voltage, high power and multi-branch permasyn motor belongs to the motor technical field; the motor includes a base, a stator winding, a rotor, a permanent magnet, a junction box and a fan; the stator winding is composed of a plurality of independent windings, which are distributed on the stator symmetrically; the three-phase terminals led out by each winding are connected with the terminals in the junction box arranged on the shell respectively, electrically connected with the terminal output ends of the junction box connected with each winding or respectively connected with each contactor respectively, or electrically connected with each frequency converter. The advantages of the motor are as follows: the problem of low cost performance of the corresponding high voltage frequency converter in the frequency converting, speed regulating and energy saving system is solved when the high voltage AC motor is taken as a main drive motor of the mechanical equipment; the control problem of the high-current contactor in the low voltage and high power AC motor is overcome; the problems such as current rating and difficult cooling are avoided when the low voltage and high power AC motor adopts a low voltage and high power frequency converter to supply power.
Description
Technical field
The invention belongs to technical field of motors, is a kind of low-voltage high power multi-branch permanent magnet synchronous motor furtherly, particularly equips the main drive motor of usefulness about big machinery.
Background technology
Such as: blower fan, the load of the pumps in the industries such as mine, electric power, metallurgy, petrochemical industry, cement and plumbing with have in the mechanized equipment than large rotating inertia, adopt high-voltage asynchronous motor to drive usually greater than 1kV.This electric pressure brings problems not only for design, manufacturing and the maintenance of motor, the more important thing is for the drive system that needs variable speed energy conservation, and corresponding high voltage converter price is very expensive, and cost performance is very low.And the low-pressure high-power frequency converter usually needs to adopt the mode of water-cooled to cool off, and the limiting current value of low-pressure high-power frequency converter can only be in 1000A at present.The efficient and the power factor of asynchronous motor are directly related with the load factor of motor simultaneously, and in mechanized equipments such as metallurgy, mine, electric power, cement, asynchronous motor can't be made multipole.In order to satisfy the low speed high torque needs of load, generally adopt the mode of asynchronous motor-gear reduction unit to realize.Gear reduction unit has not only increased the manufacturing cost of system, also has that transmission efficiency is low, vibration and drawback such as noise is serious, oil seepage pollutes, the line service amount is big.
At the above problem, domestic and international research is more active at present, representational patent of invention has: the patent of invention (patent No.: 02208573.4) " many power permanent magnetics synchronous motor " of application in 2002, power output is big when having invented the starting of a kind of working machine, and the motor power output was reduced to many power permanent magnetics synchronous motor of working machine operation power demand when working machine entered normal operation.Though this invention has solved the energy waste problem to a certain extent, does not solve the big current problems under the low-pressure high-power condition.The patent of invention of application in 2003 (patent No.: 03218033.0) " speed-adjusting-type permanent-magnet low-speed synchronous motor ", invented a kind of speed-adjusting-type permanent-magnet low-speed synchronous motor.It has adopted the balance shock-damping device, and this device utilizes power shock absorbing principle, makes motor easy motion in the very big range of speeds, the novel structure uniqueness, and easy to adjust reliable, speed adjustable range is big, operates steadily.But do not solve the big current problems under the low-pressure high-power condition yet.The patent of invention of application in 2004 (patent No.: 200420066915.4) " high starting torque permanent magnet synchronous motor ", invented a kind of high starting torque permanent magnet synchronous motor, it has high starting torque, big overload capacity, high operational efficiency.Solved the problem of main drive motor power " low load with strong power ", remarkable energy saving effect has been arranged.But still do not solve the big current problems under the low-pressure high-power condition.
Summary of the invention
At the prior art problem, the invention provides and a kind ofly compare with power motor voltage lowly, electric current is little, good insulating, high efficiency, the low-voltage high power multi-branch permanent magnet synchronous motor that overload capacity is strong.
The technical scheme that its technical solution problem of the present invention is adopted is, this machine comprises: permanent magnet synchronous motor housing, rotating shaft, left bearing, front end housing, left bearing enclosing cover, left bearing inner cap, support, stator core, stator winding, rotor, permanent magnet, terminal box, right bearing inner cap, right bearing, rear end cap, right bearing enclosing cover, fan, fan guard, wherein terminal box comprises bolt, line bank, wiring bucket, junction box seat.Left bearing enclosing cover and left bearing inner cap are installed on the front end housing by bolt, front end housing, rear end cap, terminal box is installed on the support with bolt respectively, left bearing is installed in and is clipped on the rotor between left bearing enclosing cover and the left bearing inner cap, stator core directly is installed on the support with bolt, stator winding is distributed in the stator core, rotor is by the left bearing enclosing cover, front end housing, left bearing, the left bearing inner cap, the right bearing inner cap, right bearing, the right bearing enclosing cover, rear end cap is placed on the support, permanent magnet is placed on the rotor, fan is enclosed within the rotating shaft, fan guard is enclosed within on the support, stator winding is made up of a plurality of independent sub-windings, and be arranged symmetrically on the stator, the three-phase terminal that each sub-winding is drawn respectively be located at casing on terminal box in terminal link to each other, the terminal output of the terminal box that links to each other with sub-winding or be electrically connected with each contactor respectively, or each frequency converter is electrically connected.Said sub-winding is symmetrically distributed on stator, its group number be less than or equal to or 2,3,4 times to the number of poles of permanent magnet synchronous motor, said rotor magnetic circuit structural is a surface-type or built-in.
The beneficial effect that the present invention is had compared to existing technology is: when having solved high voltage motor as the mechanized equipment main drive motor, adopt the low problem of corresponding high voltage converter cost performance in the variable-frequency speed-adjusting energy-saving system; Overcome the big contactor control problem that the low-pressure high-power alternating current motor exists; Problems such as current class when having avoided the low-pressure high-power alternating current motor to adopt the low-pressure high-power inverter supply and cooling difficulty.
When the present invention adopts the power frequency asynchronous starting, each branch road winding directly links to each other with common frequency power network by contactor, because many branch roads of motor have been shared the limiting current of original low-pressure high-power alternating current motor, electric current by every branch road contactor reduces, avoided in the past in the low-pressure high-power motor control system, contactor when disconnecting big electric current produce the phenomenon of harmful electric arc.System can be according to the size of motor load, and the group number of decision excision or the work of input branch road improves the load factor of moving winding.
When the present invention adopts multi-frequency converter to unite power supply, can also cancel the starting winding that is used for asynchronous starting, realize the varying frequency starting of permanent magnet synchronous motor.Frequency changing start up process is steady, superior performance.Cancel the starting winding, not only can reduce cost, can also reduce difficulty of processing.System equally can be according to the size of load, and put into operation the quantity of frequency converter of decision improves the load factor of operation frequency converter, improves energy-saving effect.
When the present invention is lower than 500r/min for rotating speed, moment can be cancelled the mechanical gear reductor during greater than the low speed high torque load of 500Nm, and by low-pressure high-power, and the multi-branch permanent magnet synchronous motor with low speed high torque characteristic directly drives load, the realization gearless driving.Solve fundamentally that the efficient that the mechanical gear drive system exists is low, vibration and problem such as noise is serious, oil seepage pollutes, the line service amount is big.
Description of drawings
Fig. 1 is a stator circuit structural representation of the present invention;
Fig. 2 is a low-voltage high power multi-branch permanent magnet synchronous motor structural representation of the present invention;
Fig. 3 is Fig. 2 left view;
Fig. 4 is the built-in automatic start type magnetic circuit of a rotor schematic diagram;
Fig. 5 is a rotor surface formula magnetic circuit schematic diagram;
Fig. 6 is a rotor built-in tangential formula magnetic circuit schematic diagram;
Fig. 7 is a terminal box tie lines schematic diagram of the present invention.
1 permanent magnet synchronous motor housing among the figure, 2 first windings, 3 second windings, 4 tertiary windings, 5 the 4th windings, 6 the 5th windings, 7 the 6th windings, 8 rotating shafts, 9 left bearings, 10 front end housings, 11 left bearing enclosing covers, 12 left bearing inner caps, 13 supports, 14 stator cores, 15 stator winding, 16 rotors, 17 rare-earth permanent magnets, 18 terminal boxes, 19 right bearing inner caps, 20 right bearings, 21 rear end caps, 22 right bearing enclosing covers, 23 fans, 24 fan guards, the 18-1 bolt, the 18-2 line bank, 18-3 wiring bucket, the 18-4 junction box seat.
Execution mode
In conjunction with the accompanying drawings the specific embodiment of the present invention is elaborated,
Embodiment one comprises: permanent magnet synchronous motor housing 1, rotating shaft 8, left bearing 9, front end housing 10, left bearing enclosing cover 11, left bearing inner cap 12, support 13, stator core 14, stator winding 15, rotor 16, permanent magnet 17, terminal box 18, right bearing inner cap 19, right bearing 20, rear end cap 21, right bearing enclosing cover 22, fan 23, fan guard 24, terminal box 18, bolt 18-1, line bank 18-2, wiring bucket 18-3, junction box seat 18-4.Left bearing enclosing cover 11 and left bearing inner cap 12 are installed on the front end housing 10 by bolt, front end housing 10, rear end cap 21, terminal box 18 is installed on the support 13 with bolt respectively, left bearing 9 is installed in and is clipped on the rotor 16 between left bearing enclosing cover 11 and the left bearing inner cap 12, stator core 14 directly is installed on the support 13 with bolt, stator winding 15 is distributed in the stator core 14, rotor 16 is by left bearing enclosing cover 11, front end housing 10, left bearing 9, left bearing inner cap 12, right bearing inner cap 19, right bearing 20, right bearing enclosing cover 22, rear end cap 21 is placed on the support, permanent magnet 17 is placed on the rotor 16, fan 23 is enclosed within the rotating shaft 8, fan guard 24 is enclosed within on the support 13, stator winding is by first winding 2 independently, second winding 3, the tertiary winding 4, the 4th winding 5, the 5th winding 6, the sub-winding of the 6th winding 7 is formed, and be arranged symmetrically on the stator, the three-phase terminal that each sub-winding is drawn respectively be located at casing on terminal box in terminal link to each other, the terminal output of the terminal box that links to each other with sub-winding or be electrically connected with each contactor respectively, or be electrically connected with each frequency converter.Said sub-winding is symmetrically distributed on stator, and its group number is the number of poles less than permanent magnet synchronous motor, and said rotor magnetic circuit structural is a surface-type.
Embodiment two basic structures are identical with embodiment one, and wherein sub-winding group number is identical with the number of poles of permanent magnet synchronous motor, and rotor magnetic circuit structural is a surface-type.
Embodiment three basic structures are identical with embodiment one, and wherein sub-winding group number is the number of poles that is three times in permanent magnet synchronous motor, and rotor magnetic circuit structural is built-in.
Claims (2)
1. low-voltage high power multi-branch permanent magnet synchronous motor, comprise: support, stator winding, rotor, permanent magnet, terminal box, fan, permanent magnet is located on the rotor, it is characterized in that: stator winding is made up of a plurality of independent sub-windings, and be arranged symmetrically on the stator, each sub-winding is three phase windings, the three-phase terminal that each sub-winding is drawn respectively be located at casing on terminal box in terminal link to each other, the terminal output of the terminal box that links to each other with each sub-winding or be electrically connected with each contactor respectively, or be electrically connected with each frequency converter respectively; Said a plurality of independent sub-winding is symmetrically distributed on stator, its number be less than or equal to or 2,3,4 times to the number of poles of permanent magnet synchronous motor.
2. a kind of low-voltage high power multi-branch permanent magnet synchronous motor according to claim 1 is characterized in that rotor magnetic circuit structural is a surface-type or built-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100109206A CN101320925B (en) | 2008-04-03 | 2008-04-03 | Low-voltage high power multi-branch permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100109206A CN101320925B (en) | 2008-04-03 | 2008-04-03 | Low-voltage high power multi-branch permanent magnet synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101320925A CN101320925A (en) | 2008-12-10 |
| CN101320925B true CN101320925B (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100109206A Expired - Fee Related CN101320925B (en) | 2008-04-03 | 2008-04-03 | Low-voltage high power multi-branch permanent magnet synchronous motor |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854089B (en) * | 2010-05-27 | 2014-11-19 | 张世兴 | Multi-winding motor and intelligent controller thereof |
| CN103151855B (en) * | 2013-03-26 | 2016-06-08 | 胡风华 | A kind of multi-body motor |
| EP3588748A1 (en) * | 2018-06-29 | 2020-01-01 | ABB Schweiz AG | A two-pole tefc electric motor and an electric motor drive arrangement |
| CN109245347B (en) * | 2018-11-27 | 2023-12-01 | 哈尔滨电气动力装备有限公司 | Stator frame structure for variable frequency synchronous motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102382A (en) * | 1985-04-01 | 1985-10-10 | 华中工学院 | Harmonic starting method and the motor that starts by this method |
| CN1705210A (en) * | 2004-05-31 | 2005-12-07 | 中原工学院 | Multi-three-phase permanent magnet synchronous motor with power supplied by an inverter |
| CN1705204A (en) * | 2004-05-31 | 2005-12-07 | 中原工学院 | Inverter feed rotor multi three-phase winding asynchronous motor |
-
2008
- 2008-04-03 CN CN2008100109206A patent/CN101320925B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102382A (en) * | 1985-04-01 | 1985-10-10 | 华中工学院 | Harmonic starting method and the motor that starts by this method |
| CN1705210A (en) * | 2004-05-31 | 2005-12-07 | 中原工学院 | Multi-three-phase permanent magnet synchronous motor with power supplied by an inverter |
| CN1705204A (en) * | 2004-05-31 | 2005-12-07 | 中原工学院 | Inverter feed rotor multi three-phase winding asynchronous motor |
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| CN101320925A (en) | 2008-12-10 |
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Effective date of registration: 20170419 Address after: 314411 Haining City, Zhejiang Province, the town of the town of salt in the port of the three li, Patentee after: ZHEJIANG YONGFA ELECTROMECHANICS LTD. Address before: 110023 Tiexi, Liaoning Province Xinghua South Street, No. 58, No. Patentee before: Shenyang University of Technology |
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