CN108282042A - A kind of speed governing permanent magnet synchronous motor based on change umber of turn - Google Patents
A kind of speed governing permanent magnet synchronous motor based on change umber of turn Download PDFInfo
- Publication number
- CN108282042A CN108282042A CN201810052011.2A CN201810052011A CN108282042A CN 108282042 A CN108282042 A CN 108282042A CN 201810052011 A CN201810052011 A CN 201810052011A CN 108282042 A CN108282042 A CN 108282042A
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- Prior art keywords
- winding
- permanent magnet
- speed governing
- magnet synchronous
- synchronous motor
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/0085—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for high speeds, e.g. above nominal speed
- H02P21/0089—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for high speeds, e.g. above nominal speed using field weakening
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of based on the speed governing permanent magnet synchronous motor for becoming umber of turn, including three-phase windings, include the multiple series connection winding elements being sequentially connected in series per phase winding, each series connection winding element includes a winding and two winding control structures, a winding control structure and winding after parallel connection is in parallel with another winding control structure, winding control structure is for controlling whether the winding when speed governing permanent magnet synchronous motor works is passed through electric current, change the back-emf that series connection winding element accesses the number of turns control speed governing permanent magnet synchronous motor, reduce weak magnetoelectricity stream, improves performance.In speed governing permanent magnet synchronous motor provided by the invention, by disconnecting the winding control structure with windings in series, it is closed the winding control structure with winding parallel, it realizes and winding is bypassed using tripping system, umber of turn in access speed governing permanent magnet synchronous motor when reducing work, reduce back-emf, increases the number of rated point, reach expanding governing.
Description
Technical field
The invention belongs to permanent magnet synchronous motor technical fields, more particularly, to a kind of based on the speed governing for becoming umber of turn
Permanent magnet synchronous motor.
Background technology
China's rare earth resources are abundant, and the reserves of Rare Earth Mine are 4 times or so of other various countries of world synthesis, rare earth ore and dilute
The yield of native permanent magnetism all positions are at the forefront in the world.Meanwhile China rare earth material research and rare-earth permanent-magnet electric machine scientific research level all
International most advanced level is reached.Therefore, the advantage of rare earth resources is given full play to, research and extension energetically is applied with rare earth permanent magnet electricity
Machine is the various magnetoes of representative has most important theories meaning and practical value to China.Magneto is compared with conventional motors,
It is simple in structure, it is reliable for operation；It is small, light weight；Be lost it is small, it is efficient；Using very extensive, almost spread aerospace,
National defence, industrial and agricultural production and the every field of daily life.Such as motor in electric automobile, aircraft in the wider application of speed adjustable range
Starter-generator, electro spindle machine motor etc., it is desirable that motor can be operated above in rated speed, and when motor reaches a certain turn
The output voltage of inverter has reached maximum when fast, at this moment to continue raising motor speed and just need to reduce motor gas-gap magnetic flux,
Namely need weak magnetic field operation.Keep voltage constant, the decrease of control magnetic flux is transported to reach control synchronous motor more than base speed
Capable purpose.However in weak magnetic section, with the rising of rotating speed, efficiency is gradually reduced；Rotating speed increases simultaneously, and back-emf accordingly increases
Greatly, to keep voltage constant, weak magnetoelectricity stream also accordingly increases so that electric current is even more than rated point electric current, so as to cause very big
Wen Sheng.In addition, the speed regulating section of motor is also restricted by inverter, it is desirable to increase speed regulating section and generally require to increase inversion
The capacity of device.This series of factors causes the performance in weak magnetic section motor to substantially reduce, therefore improves magneto in high speed
The efficiency in section is significant.
More rated operation point rare-earth permanent-magnet electric machines in the prior art, the method by changing parallel branch number reduce high velocity
Between back-emf, to achieve the purpose that " not weak magnetic ".Winding connection as shown in Figure 1, 2, 3, motor be divided into low speed, middling speed,
High speed rated point.First rated operation point winding connection end 1,2,3 is external three-phase lead-out wire terminals, and terminals 1 are A phases,
Terminals 2 are B phases, and terminals 3 are C phases, and terminals 4,5,6 are simultaneously connected in star midpoint, the second rated operation point winding connection side
Method is：Terminals 1,8 phases and be A phases, terminals 2,10 phases and be B phases, terminals 3,12 phases and be C phases, terminals 7,4,9,
5,11,6 phases and be star midpoint, third rated operation point winding connection method is：1,8,14,16 phase of terminals and be A phases, connect
2,10,18,20 phase of line end and be B phases, 24,22,12,3 phase of terminals and be C phases, terminals 13,15,7,4,17,19,9,5,
21,23,11,6 phases and be star midpoint.The parallel branch number of first rated point is 1, and the parallel branch number of the second rated point is 2,
The parallel branch number of third rated point is 4.The corresponding back-emf of the different connection type of lower three kinds of same rotating speed is E, E/2 respectively,
E/4, therefore at " low speed ", section uses the first rated point connection type, " middling speed " section to use the second rated point connection type,
" high speed " section can effectively reduce back-emf using third tie point connection type, to achieve the purpose that " not weak magnetic ".So
And existing more rated operation point rare-earth permanent-magnet electric machines, the number of rated operation point are coordinated by pole slot, several rated speed spans
Greatly；Winding connection is complicated；Required switch is more, and reliability is low.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides a kind of based on the speed governing for becoming umber of turn
Permanent magnet synchronous motor, its object is to solve, there are apparent weak magnetic effects to lead when existing speed governing permanent magnet synchronous motor runs on high speed
The technical issues of causing motor performance to decline.
To achieve the above object, the present invention provides a kind of based on the speed governing permanent magnet synchronous motor for becoming umber of turn, including
Three-phase windings, wherein every phase winding includes the multiple series connection winding elements being sequentially connected in series, and each winding element of connecting includes one
Winding and two winding control structures, a winding control structure and winding after series connection with another winding control structure simultaneously
Connection, winding control structure change series connection winding for controlling whether the winding when speed governing permanent magnet synchronous motor works is passed through electric current
Unit accesses the back-emf of the number of turns control speed governing permanent magnet synchronous motor, controls weak magnetoelectricity stream, improves performance.
Preferably, each umber of turn is determined according to speed governing demand in series connection winding element.
Preferably, the few series connection winding element of the number of turns is located at stator trench bottom, and the series connection winding element more than the number of turns is located at fixed
Pilot trench top.
Preferably, winding control structure is contactor or electronic power switch.
Preferably, which further includes multiple parallel winding units, parallel winding unit with connect around
Group series connection, each parallel winding unit include parallel branch in parallel successively, each parallel branch include be sequentially connected in series it is multiple
Series connection winding construction, each winding construction of connecting include the winding being connected with each other and winding control minor structure, and winding controls son knot
Structure changes parallel winding unit and accesses the number of turns control for controlling whether the winding when speed governing permanent magnet synchronous motor works is passed through electric current
The back-emf of speed governing permanent magnet synchronous motor processed controls weak magnetoelectricity stream, improves performance.
Preferably, the few parallel winding unit of the number of turns or the few series connection winding element of the number of turns are located at stator trench bottom, the number of turns
Series connection winding element more than more parallel winding units or the number of turns is located at stator slot top.
Preferably, series connection winding construction includes that a winding and two windings control minor structure, a winding after series connection
It is in parallel with another winding control minor structure to control minor structure and winding.
Preferably, when speed governing permanent magnet synchronous motor is from low speed to high-speed cruising, winding control structure make where series connection around
Winding bypasses in group unit, and umber of turn in access speed governing magneto is made to tail off, and reduces winding back-emf.
Preferably, when speed governing permanent magnet synchronous motor is from low speed to high-speed cruising, winding control minor structure is connected where making
Winding bypasses in winding construction, and ensures that each parallel winding unit switch-on coil the number of turns is identical, makes access speed governing magneto
Middle umber of turn tails off, and reduces winding back-emf.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect：
1, it in speed governing permanent magnet synchronous motor provided by the invention, by disconnecting the winding control structure with windings in series, closes
The winding control structure with winding parallel is closed, realizes and winding is bypassed using tripping system, access speed governing permanent magnetism is same when reducing work
Umber of turn in motor is walked, reduces back-emf, increases the number of rated point, reach expanding governing.
2, the motor reduces weak magnetoelectricity stream using the method for reducing back-emf, reduces copper loss, reduces Wen Sheng, improves efficiency；
Meanwhile avoiding causing after due to weak magnetoelectricity stream rising the ingredient of harmonic flux density from being improved with respect to the ingredient of fundamental wave flux density, so that
Torque pulsation is reduced.
Description of the drawings
Fig. 1 is the winding connection diagram that existing more rated operation point rare-earth permanent-magnet electric machines work in the first rated point；
Fig. 2 is the winding connection diagram that existing more rated operation point rare-earth permanent-magnet electric machines work in the second rated point；
Fig. 3 is the winding connection diagram that existing more rated operation point rare-earth permanent-magnet electric machines work in third rated point；
Fig. 4 is the fundamental diagram of speed governing permanent magnet synchronous motor provided by the invention；
Fig. 5 is winding construction schematic diagram in speed governing permanent magnet synchronous motor provided by the invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
For the existing magneto defect that performance declines after weak magnetic, the present invention proposes a kind of based on change winding turns
Several speed governing permanent magnet synchronous motors subtracts its object is to reach expanding governing by changing winding connection reduction back-emf
Small weak magnetoelectricity stream.
Speed governing permanent magnet synchronous motor provided by the invention based on change umber of turn, which includes three-phase windings, wherein
Include the multiple series connection winding elements being sequentially connected in series per phase winding, each winding element of connecting includes a winding and two windings
Control structure, winding is in parallel with another winding control structure after connecting with a winding control structure, and winding control structure is used
In control, when speed governing permanent magnet synchronous motor works, whether winding is passed through electric current.When speed governing permanent magnet synchronous motor is from low speed at a high speed
When operation, winding bypasses in series connection winding element where winding control structure makes, and makes umber of turn in access speed governing magneto
It tails off, reduces winding back-emf.And the speed governing permanent magnet synchronous motor cuts off winding using tripping system, rather than use and winding breaks
The mode on road, torque ripple is small when electric machine speed regulation, and safe and reliable.
Speed governing permanent magnet synchronous motor provided by the invention is based on abandoning the number of turns transformation, that is, changes the number of turns when operation, with electricity
The winding control structure that rises through of machine rotor rotating speed gradually abandons the number of turns so that the number of turns of motor is less than low speed at high speeds
When motor the number of turns, since winding back-emf is directly proportional to rotor speed and windings in series the number of turns, when high speed, reduces windings in series
The number of turns makes back-emf when high speed reduce, and so that weak magnetoelectricity stream is reduced, it might even be possible to not weak magnetic；By the way that series connection winding list is rationally arranged
Umber of turn in first number and series connection winding element, can be arranged multiple high speed rated operation points, make it in whole service area
Interior not weak magnetic.
Umber of turn is determined according to speed governing demand in each series connection winding element, i.e., according to the speed of different rated operation points
Umber of turn in series connection winding element more each than determination.The few series connection winding element of the number of turns is located at stator trench bottom, more than the number of turns
Series connection winding element is located at stator slot top, can efficiently use slot, and should insulate between each series connection winding element.Winding
Control structure is contactor or electronic power switch.
Speed governing permanent magnet synchronous motor provided by the invention, including multiple parallel winding units and multiple series connection winding elements,
Connection relation can be between parallel winding unit and winding element of connecting：Parallel winding unit with connect winding element at equal intervals
Series connection, i.e. a parallel winding unit are connected by a series connection winding element with another parallel winding unit, parallel winding
Unit and winding element unequal interval series connection of connecting, i.e., it is same by a series connection winding element after multiple parallel winding unit series connection
Other parallel winding units connect.Each parallel winding unit includes the parallel branch of parallel connection, and each parallel branch structure is identical,
Each parallel branch includes the multiple series connection winding minor structures being sequentially connected in series, and each winding minor structure of connecting includes being connected with each other
Sub- winding and winding control minor structure, and winding controls minor structure for whether controlling when speed governing permanent magnet synchronous motor works winding
It is passed through electric current, changes the back-emf that parallel winding unit accesses the number of turns control speed governing permanent magnet synchronous motor, controls weak magnetoelectricity stream, carry
High-performance.
Above-mentioned series connection winding minor structure includes that a sub- winding and two windings control minor structure, sub- winding and a winding
It is connect with another winding control minor structure after control minor structure series connection.When speed governing permanent magnet synchronous motor is from low speed to high-speed cruising
When, series connection winding minor structure neutron winding bypass where winding control minor structure makes, and ensure each parallel winding unit access
Coil turn is identical, and umber of turn in access speed governing magneto is made to tail off, and reduces winding back-emf.The few parallel winding of the number of turns
Unit or the few series connection winding element of the number of turns are located at stator trench bottom, the series connection more than parallel winding unit or the number of turns more than the number of turns around
Group unit is located at stator slot top, improves stator slot utilization rate.
Fig. 4 is the fundamental diagram of speed governing permanent magnet synchronous motor provided by the invention, by taking two rated points as an example, this programme
Proposed invention scheme includes but not limited to the situation, which is only used for that the connection type of winding is described in detail.
Each phase winding is divided into two sections of X windings and Y windings, and a is X winding A phase heads, and O is X winding A phase tails；B is X windings
B phase heads, O are X winding B phase tails, and c is X winding C phase heads, and O is X winding C phase tails, and O is common junction, and e is Y winding A phase heads, and h is
Y winding A phase tails, f are Y winding B phase heads, and i is Y winding B phase tails, and g is Y winding C phase heads, and j is Y winding C phase tails, a, b, c, O group
At X windings, e, f, g, h, i, j form Y windings, and a, b, c are X winding star A, B, C three-phase terminals, e, f, g, h, i, j be Y around
Group three-phase A, B, C terminal.A, b, c of X windings are connected with h, i, j of Y windings respectively；The arrangement of X and Y double winding coils is complete
It is complete the same, but the number of turns is different.
When speed governing permanent magnet synchronous motor is when low speed is run, ABC three phase mains connects e, f, g terminals of Y windings respectively, when
In high-speed cruising, ABC three phase mains disconnects speed governing permanent magnet synchronous motor with e, f, g, connects a, b, c terminals of X windings respectively.
The ratio of " high speed " rated speed and " low speed " rated speed be X windings turns-in-series and X windings and Y windings in series the number of turns it
The ratio of sum.
Fig. 5 is winding construction schematic diagram in speed governing permanent magnet synchronous motor provided by the invention, includes going here and there successively per phase winding
The multiple series connection winding elements and a winding of connection, each winding element of connecting include a winding and two switches, winding list
Member is again in parallel with another switch S2 after connecting with one of switch S1, and switch S1 is closed when low speed is run, switch S2 disconnections,
Switch S1, closure switch S2 are disconnected when rotating speed rises to " high speed " rated speed.It only need to be winding when 3 rated points are arranged
It is divided into three sections, the identical only the number of turns of each section of connection is different, and as speed increases, it is specified that the primary switching of switch changes its
Point.
The present invention proposes that conventional electricity may be used in shaft, casing, end cap and rotor punching used in electric machine structure
The existing structure of machine only draws out section of winding when offline without redesigning mold without special designing respectively
Line.Electric machine structure is simple, and winding is changed on the basis of existing motor.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of based on the speed governing permanent magnet synchronous motor for becoming umber of turn, which is characterized in that including:
Three-phase windings include the multiple series connection winding elements being sequentially connected in series per phase winding, and each winding element of connecting includes one
Winding and two winding control structures, the winding control structure and winding after series connection are in parallel with another winding control structure, around
Group control structure changes series connection winding element and connects for controlling whether the winding when speed governing permanent magnet synchronous motor works is passed through electric current
Enter the back-emf that the number of turns realizes control speed governing permanent magnet synchronous motor, reduces weak magnetoelectricity stream, improve performance.
2. speed governing permanent magnet synchronous motor as described in claim 1, which is characterized in that umber of turn in each series connection winding element
It is determined according to speed governing demand.
3. speed governing permanent magnet synchronous motor as claimed in claim 1 or 2, which is characterized in that the few series connection winding element position of the number of turns
In stator trench bottom, the series connection winding element more than the number of turns is located at stator slot top.
4. speed governing permanent magnet synchronous motor as described in any one of claims 1 to 3, which is characterized in that winding control structure is to connect
Tentaculum or electronic power switch.
5. such as Claims 1-4 any one of them speed governing permanent magnet synchronous motor, which is characterized in that the speed governing permanent magnet synchronous electric
Machine further includes multiple parallel winding units, parallel winding unit and windings in series of connecting, and each parallel winding unit includes successively
Parallel branch in parallel, each parallel branch includes the multiple series connection winding constructions being sequentially connected in series, each winding construction packet of connecting
The sub- winding and winding control minor structure, winding for including interconnection control minor structure and work as speed governing permanent magnet synchronous motor work for controlling
Whether sub- winding is passed through electric current when making, and changes parallel winding unit and accesses the anti-electricity that the number of turns realizes control speed governing permanent magnet synchronous motor
Gesture reduces weak magnetoelectricity stream, improves performance.
6. speed governing permanent magnet synchronous motor as claimed in claim 5, which is characterized in that the few parallel winding unit of the number of turns or the number of turns
Few series connection winding element is located at stator trench bottom, and the series connection winding element more than parallel winding unit or the number of turns more than the number of turns is located at
Stator slot top.
7. such as speed governing permanent magnet synchronous motor described in claim 5 or 6, which is characterized in that series connection winding construction includes a son
Winding and two windings control minor structure, and the winding control minor structure and sub- winding after series connection control son with another winding
Structure is in parallel.
8. such as claim 5 to 7 any one of them speed governing permanent magnet synchronous motor, which is characterized in that when speed governing permanent magnet synchronous electric
When machine is from low speed to high-speed cruising, winding bypasses in series connection winding element where winding control structure makes, and makes access speed governing permanent magnetism
Umber of turn tails off in motor, reduces winding back-emf.
9. such as claim 5 to 8 any one of them speed governing permanent magnet synchronous motor, which is characterized in that when speed governing permanent magnet synchronous electric
When machine is from low speed to high-speed cruising, series connection winding construction neutron winding bypass where winding control minor structure makes, and ensure each
Parallel winding unit switch-on coil the number of turns is identical, and umber of turn in access speed governing magneto is made to tail off, and reduces winding back-emf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052011.2A CN108282042A (en) | 2018-01-19 | 2018-01-19 | A kind of speed governing permanent magnet synchronous motor based on change umber of turn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052011.2A CN108282042A (en) | 2018-01-19 | 2018-01-19 | A kind of speed governing permanent magnet synchronous motor based on change umber of turn |
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| Publication Number | Publication Date |
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| CN108282042A true CN108282042A (en) | 2018-07-13 |
Family
ID=62804011
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810052011.2A Pending CN108282042A (en) | 2018-01-19 | 2018-01-19 | A kind of speed governing permanent magnet synchronous motor based on change umber of turn |
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Cited By (4)
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| CN109301965A (en) * | 2018-10-25 | 2019-02-01 | 北京精密机电控制设备研究所 | A kind of electric motor and controller method that electromagnetic structure is variable |
| CN110266132A (en) * | 2019-05-20 | 2019-09-20 | 珠海格力电器股份有限公司 | magnetic suspension bearing, stator, winding and manufacturing method thereof, motor and compressor |
| CN110492641A (en) * | 2019-07-19 | 2019-11-22 | 哈尔滨理工大学 | A kind of permanent magnet synchronous motor of automobile-used multi gear position speed regulation |
| CN116743030A (en) * | 2023-06-28 | 2023-09-12 | 浙江海川电气科技有限公司 | Permanent magnet brushless gear shifting motor |
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| CN116743030A (en) * | 2023-06-28 | 2023-09-12 | 浙江海川电气科技有限公司 | Permanent magnet brushless gear shifting motor |
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Application publication date: 20180713 |