CN201976055U - Synchronous motor operating system - Google Patents
Synchronous motor operating system Download PDFInfo
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- CN201976055U CN201976055U CN201120102056XU CN201120102056U CN201976055U CN 201976055 U CN201976055 U CN 201976055U CN 201120102056X U CN201120102056X U CN 201120102056XU CN 201120102056 U CN201120102056 U CN 201120102056U CN 201976055 U CN201976055 U CN 201976055U
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- motor
- connection
- controller
- synchronous motor
- control unit
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Abstract
The utility model discloses a synchronous motor operating system, which comprises a controller, a program control unit, a switching control circuit and an encoder. The controller is used for supplying power to a motor and recording the current parameters and connection method of the motor; the program control unit is used for receiving signals of the controller and setting next connection method of the motor; the switching control circuit comprises a plurality of switches connected with stator windings and is used for selectively connecting the switches according to the signals of the program control unit; and the encoder is used for receiving commands transmitted by the controller for phase adjustment. The synchronous motor operating system can be used instead of a traditional combination of an asynchronous motor and a gearbox to adjust the speed of the motor. Moreover, the transmission device of mechanical equipment can be simplified, the efficiency can be increased, the cost can be saved, and the energy consumption can be reduced.
Description
Technical field
The utility model also relates to Motor Control Field, is a kind of operational system of synchronous motor specifically.
Background technology
Present permanent magnet synchronous motor is all with fixing connection (Y connects or Δ connects) operation.During the permanent magnet synchronous motor operation, along with rotating speed raises, because the decision of the characteristic of permanent magnet, the weak magnetic property of permanent magnet synchronous motor is relatively poor, and back-emf will raise along with the rising of rotating speed, limit the operation area of permanent magnet synchronous motor.General permanent magnet synchronous motor is a speed regulation by constant torque below rated speed (nN), is can realize constant-power speed regulation speed regulation by constant torque below rated speed, but can not realize constant-power speed regulation more than rated speed (nN).See Fig. 1, be the torque-speed curve of existing synchronous motor.Like this, be difficult to take into account low speed and high speed performance simultaneously, especially need big range of speeds constant-power speed regulation occasion, have to use gear, by mechanical speed change, in the hope of reaching the purpose of constant-power speed regulation.
The utility model content
The technical problems to be solved in the utility model provides a kind of operational system of synchronous motor, and motor is operated in the permanent power region, and improves maximum (top) speed.
The utility model is by the following technical solutions:
A kind of operational system of synchronous motor is characterized in that comprising:
Controller provides motor power, record motor parameter current and connection;
Procedure control unit receives the signal of described controller, sets the next connection of motor;
Control switching circuit comprises a plurality of switches that are connected with stator winding, splits to close according to the signal of procedure control unit and carries out the selectivity connection;
Encoder is accepted the instruction that controller sends and is carried out phase adjusted.
Preferably, described encoder is located on the motor, and when stator winding connection generation connection changed, controller was poor to encoder compensation electrical degree.
Preferably, described electrical degree difference is ± 30 °.
Adopt the operational system of the related synchronous motor of the utility model, can expand the velocity interval of permanent magnet synchronous motor, and can realize the stairstepping constant-power speed regulation that the big range of speeds is interior, therefore can replace traditional asynchronous motor to carry out speed governing with combining of gearbox.Not only can achieve the above object, and can simplify the transmission device of plant equipment, and raise the efficiency, save cost, and cut down the consumption of energy.
Description of drawings
Fig. 1 is the torque-speed curve of existing synchronous motor.
Fig. 2 be in the embodiment in the table 1 state 1 to the concrete connection of state 3, wherein T
o(o=1,2,3 ...) be each stator winding end.
Fig. 3 is the pairing torque-speed curve of connection among Fig. 2.
The operational system of the synchronous motor that Fig. 4 relates to for the utility model.
Fig. 5 is original Digit Control Machine Tool speed-regulating scheme schematic diagram.
Fig. 6 is the Digit Control Machine Tool speed-regulating scheme schematic diagram after the employing the technical solution of the utility model.
Embodiment
The synchronous motor that the utility model relates to comprises many group threephase stator windings, procedure control unit and control switching circuit, and described operation method is:
(1) export when constant when motor operates in power, procedure control unit is judged the stator winding connection of this moment;
(2) when stator winding was Y-connection, procedure control unit changed connection by control switching circuit, transferred delta connection (Δ connects) to by star connection (Y connects); When stator winding was delta connection, procedure control unit changed connection by control switching circuit, transferred star connection to by delta connection;
(3) wait for the permanent power transfer of motor next time after connection changes.
Described control switching circuit is to comprise a plurality of switches that are connected with stator winding, splits to close according to the signal of procedure control unit and carries out the selectivity connection.
In addition, when the stator winding connection took place to change, controller was poor to the compensation of the encoder in motor electrical degree.Described electrical degree difference is ± 30 °.
Correlation formula after each connection conversion of synchronous machine following (a is a way of threephase stator winding, and n is the winding wire number of turns on each bar branch road):
When a was constant before and after transformation, aY connect change a Δ and connects back induced potential relation formula:
E
aΔ＝1.732×E
aY (1)
Constant when connection, when a changed, aY (a Δ) met change naY (na Δ) and connects back induced potential relation formula:
E
NaY=n * E
AYOr E
The na Δ=n * E
The a Δ(2)
When a and connection all changed, a Δ (aY) connect and becomes naY (na Δ) and connect back induced potential relation formula:
E
NaY=n/1.732 * E
The a ΔOr E
The na Δ=n * 1.732 * E
AY(3)
The electromotive force equation of synchronous machine is (U: motor phase voltage; I: stator phase current; Z: stator impedance; E: back-emf):
U＝E+I×Z (4)
By formula (1) as can be known: when stator winding a does not change, no matter be that Y connects and becomes Δ and connect, still Δ meets change Y and connects, and can both change back-emf E;
By formula (2) as can be known: do not change star, delta-connection and only change a and also can change back-emf E;
By formula (3) as can be known: variable, delta-connection and a also can change back-emf E simultaneously;
By formula (4) as can be known: motor phase voltage U must be greater than back-emf E;
Because back-emf is directly proportional with rotating speed under the certain situation in magnetic field.Therefore, carry out winding conversion after, permagnetic synchronous motor back-emf E increases or reduces, then the permanent magnet motor rated speed is along with increasing or reduce, and then torque then reduces or increases.The operation method of the permanent magnet synchronous motor that the utility model relates to is by different stator winding connection combinations, to adjust the back electromotive force of permanent magnet synchronous motor, and then raising permanent magnet synchronous motor operation area, reached the stairstepping constant-power speed regulation characteristic in the big range of speeds, the great like this scope of application that improves permanent magnet synchronous motor, permanent power is directly driven becomes possibility.Should be noted that after permanent magnet synchronous motor Y connect and connects conversion with Δ, the encoder angle was regulated (Y connects the difference that is connected to 30 degree electrical degrees with Δ) by controller.
If every phase stator coil number is 2, then the stator winding connection makes up 1 (wherein parameter n, a and last same) that see the following form:
| State | 1 | 2 | 3 | ...... |
| n | 2 | 2 | 1 | ...... |
| a | 1 | 1 | 2 | ...... |
| Connection | 1Y | 1Δ | 2Y | ...... |
Table 1
See Fig. 2, be the concrete connection of state in the last table 1,2,3, wherein T
o(o=1,2,3 ...) be each stator winding end, and Fig. 3 is the pairing torque-speed curve of connection among Fig. 2.Obviously, the connection conversion can be expanded the velocity interval of permanent magnet synchronous motor.
If every phase stator coil number is 16, then the stator winding connection makes up 2 (wherein parameter n, a and last same) that see the following form:
| State | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| n | 16 | 16 | 8 | 8 | 4 | 4 | 2 | 2 | 1 | 1 |
| a | 1 | 1 | 2 | 2 | 4 | 4 | 8 | 8 | 16 | 16 |
| Connection | 1Y | 1Δ | 2Y | 2Δ | 4Y | 4Δ | 8Y | 8Δ | 16Y | 16Δ |
Table 2
If every phase stator coil number is 24, then the stator winding connection makes up 3 (wherein parameter n, a and last same) that see the following form:
| State | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| n | 24 | 24 | 8 | 8 | 4 | 4 | 2 | 2 | 1 | 1 |
| a | 1 | 1 | 3 | 3 | 6 | 6 | 12 | 12 | 24 | 24 |
| Connection | 1Y | 1Δ | 3Y | 3Δ | 6Y | 6Δ | 12Y | 12Δ | 24Y | 24Δ |
Table 3
Obviously, can draw,, just can realize the continuous conversion of two kinds of connections, and along with the stator coil number is big more, transition status can continue when having set the stator coil number by above several embodiment.Can learn also that by last table 2,3 winding also can directly enter the third state from first state, is converted to four condition again.
Though the transformation on the connection is also arranged when the startup of asynchronous machine, be that Y connects and transforms to that Δ connects or Δ connects and transforms to Y and connect, but this transformation can only be applied in the startup occasion of asynchronous motor, it is the torque in order to reduce or to increase asynchronous motor and start, can cause the underexcitation or supersaturation in asynchronous motor magnetic field simultaneously, so after electric motor starting finishes, must adopt specified connection operation, and can not when rated condition is moved, carry out the mutual conversion between two kinds of connections.And the operation method that adopts the utility model to relate to just can make synchronous machine under rated condition, carries out the conversion between the different winding connection methods, and motor is operated in the different rotating speeds scope, has reached instructions for use.In addition, asynchronous motor is an induction machine, its rotor field is responded to by stator, after so Y connects and connects conversion with Δ, there is not the difference of electrical degree, but the rotor field of synchronous motor is not change, so there is the electrical degree problem in permanent magnet synchronous motor, needs by solving regulating and control as encoder.
The operational system of the synchronous motor that Fig. 4 relates to for the utility model.Comprise controller, motor power is provided, record motor parameter current and connection; Procedure control unit receives the signal of described controller, sets the next connection of motor; Control switching circuit comprises a plurality of switches that are connected with stator winding, splits to close according to the signal of procedure control unit and carries out the selectivity connection; Encoder is accepted the instruction that controller sends and is carried out phase adjusted.
Wherein, controller mainly provides power supply and the record motor parameter current and the connection of drive motors, and the described parameter of electric machine comprises output voltage, electric current etc., and in addition, controller also needs code device signal is fed back; Procedure control unit decision stator winding connection; And control switching circuit can be realized the conversion of winding connection method; When the stator winding connection took place to change, controller was poor to the encoder compensation electrical degree of being located on the motor.
With the Digit Control Machine Tool is example, and the main transmission of Digit Control Machine Tool generally is made of driver (frequency converter)+frequency conversion asynchronous motor+gearbox.By gearbox, carry out switching between each grade rotating speed, in the hope of realizing low speed (high pulling torque) and the conversion between (permanent power) cutting at a high speed.And the technical scheme of employing utility model, because the conversion between the employing different winding structures, thereby realized that low-speed big is to the little moment of torsion of high speed, permanent power section operation on a large scale.The main transmission that makes Digit Control Machine Tool is changed into permanent magnet synchronous servo motor and is directly driven by driver (frequency converter)+frequency conversion asynchronous motor+gearbox, reaches the purpose of adjusting the Digit Control Machine Tool rotating speed.This shows that main advantage is: 1. removed gearbox, improved the precision of lathe; 2. improved the response speed of lathe; 3. save cost; 4. improved the efficient of drive system, cut down the consumption of energy.See Fig. 5-6, the Digit Control Machine Tool speed-regulating scheme schematic diagram after being respectively original Digit Control Machine Tool speed-regulating scheme schematic diagram and adopting the technical solution of the utility model.
Claims (3)
1. the operational system of a synchronous motor is characterized in that comprising:
Controller provides motor power, record motor parameter current and connection;
Procedure control unit receives the signal of described controller, sets the next connection of motor;
Control switching circuit comprises a plurality of switches that are connected with stator winding, splits to close according to the signal of procedure control unit and carries out the selectivity connection;
Encoder is accepted the instruction that controller sends and is carried out phase adjusted.
2. the operational system of synchronous motor according to claim 1, it is characterized in that: described encoder is located on the motor, and when stator winding connection generation connection changed, controller was poor to encoder compensation electrical degree.
3. the operational system of synchronous motor according to claim 2, it is characterized in that: described electrical degree difference is ± 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120102056XU CN201976055U (en) | 2011-04-08 | 2011-04-08 | Synchronous motor operating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120102056XU CN201976055U (en) | 2011-04-08 | 2011-04-08 | Synchronous motor operating system |
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| Publication Number | Publication Date |
|---|---|
| CN201976055U true CN201976055U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120102056XU Expired - Lifetime CN201976055U (en) | 2011-04-08 | 2011-04-08 | Synchronous motor operating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739134A (en) * | 2011-04-08 | 2012-10-17 | 上海奥闻电机有限公司 | Operation method and operation system of synchronous motor |
-
2011
- 2011-04-08 CN CN201120102056XU patent/CN201976055U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739134A (en) * | 2011-04-08 | 2012-10-17 | 上海奥闻电机有限公司 | Operation method and operation system of synchronous motor |
| CN102739134B (en) * | 2011-04-08 | 2014-04-30 | 北京索德电气工业有限公司 | Operation method and operation system of synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Nie Yapeng Inventor after: Jiang Yu Inventor after: Gao Xiaoyan Inventor after: Xiang Shoubing Inventor after: Tang Xiaolin Inventor before: Nie Yapeng Inventor before: Jiang Yu Inventor before: Yu Menglu Inventor before: Cui Dengfei Inventor before: Gao Xiaoyan |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: NIE YAPENG JIANG YU YU MENGLU CUI DENGFEI GAO XIAOYAN TO: NIE YAPENG JIANG YU GAO XIAOYAN XIANG SHOUBING TANG XIAOLIN |
|
| ASS | Succession or assignment of patent right |
Owner name: BEIJING SWORD ELECTRIC INDUSTRIAL CO., LTD. Free format text: FORMER OWNER: SHANGHAI AOWEN MOTOR CO., LTD. Effective date: 20130424 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201817 JIADING, SHANGHAI TO: 100055 XUANWU, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130424 Address after: 100055 Beijing city Xuanwu District Guang'an South Binhe Road No. 1 (new building room 1305) Patentee after: Beijing SWORD Electric Industrial Co., Ltd. Address before: 201817, E-2, 1355 North Road, Jiading District, Shanghai Patentee before: Shanghai Aowen Motor Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110914 |
|
| CX01 | Expiry of patent term |