CN107834928B - Flux linkage setting method for asynchronous motor of diesel locomotive - Google Patents
Flux linkage setting method for asynchronous motor of diesel locomotive Download PDFInfo
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- CN107834928B CN107834928B CN201711186451.9A CN201711186451A CN107834928B CN 107834928 B CN107834928 B CN 107834928B CN 201711186451 A CN201711186451 A CN 201711186451A CN 107834928 B CN107834928 B CN 107834928B
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- 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
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/141—Flux estimation
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- 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
- H02P21/22—Current control, e.g. using a current control loop
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- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
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- 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
- H02P2207/01—Asynchronous machines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention relates to a motor flux linkage setting technology, in particular to a flux linkage setting method for an asynchronous motor of an internal combustion locomotive. The method solves the problem of current loop PI item saturation in vector control caused by low actual bus voltage in the existing method for giving the flux linkage of the asynchronous motor of the diesel locomotive. The flux linkage giving method is realized by the following steps: when any frequency fr point is above the rated frequency f2 point; (II) when any frequency fr point is between the rated frequency f2 point and the switching frequency f1 point of the low-speed area and the middle-speed area; and (iii) any frequency fr point is between the switching frequency f1 point of the low-speed region and the middle-speed region and zero. The flux linkage setting method can reduce flux linkage of the asynchronous motor when the bus voltage is low, and achieves the purpose of preventing the current loop PI item from being saturated.
Description
Technical Field
The invention relates to a motor flux linkage setting technology, in particular to a flux linkage setting method for an asynchronous motor of an internal combustion locomotive.
Background
The traction system of the diesel locomotive mainly comprises a main generator, an auxiliary generator, a traction rectifier cabinet, a traction inverter cabinet and a traction motor. The whole vehicle control unit controls the exciting current of the main generator and the auxiliary generator and the rotating speed of the diesel engine to output three-phase alternating current voltage according to the handle gear of the driver controller, outputs direct current voltage through the traction rectifier, converts the direct current voltage into three-phase frequency voltage adjustable alternating current voltage through the inverter, and supplies power to the traction motor, so that traction control is completed.
The diesel locomotive establishes different direct current bus voltages according to different handle gears and motor rotating speeds. The wide range of the direct current bus voltage changes to provide new requirements for the flux linkage given technology of the asynchronous motor control.
In the prior art, corresponding magnetic chains are respectively arranged according to the handle gear of a driver controller. Before the rated point, the flux linkage is a fixed value corresponding to the gear; after the rated point, the flux linkage is weakened according to the '1/wr inverse proportion weak magnetic method'. When the motor runs at a certain gear, if the actual bus voltage is low and the flux linkage is unchanged, the flux linkage is relatively large, so that vector control failure caused by saturation of a current loop PI item in vector control is easily caused.
Disclosure of Invention
The invention solves the problem of current loop PI item saturation in vector control caused by low actual bus voltage in the existing method for giving flux linkage of the asynchronous motor of the diesel locomotive, and provides a method for giving flux linkage of the asynchronous motor of the diesel locomotive.
The invention is realized by adopting the following technical scheme: the method for giving the flux linkage of the asynchronous motor of the diesel locomotive is realized by the following steps:
when any frequency fr point is above the rated frequency f2 point
1) Acquiring or obtaining a direct-current bus voltage Udc8_ f2 of the highest gear of a handle of a driver at a rated frequency f2 point (direct-current bus voltages Udc8_ f2 and Udc7_ f2 … … Udc1_ f2 of each gear of the handle of the driver at the rated frequency f2 point are known);
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) the flux linkage Phir at any frequency fr point is:
wherein K =1/Udc8_ f 2;
when any frequency fr point is between the rated frequency f2 point and the switching frequency f1 points of the low speed region and the middle speed region
1) Collecting or acquiring direct-current bus voltages Udc8_ f2 and Udc1_ f2 of the highest and lowest gears of a driver handle at a rated frequency f2 point and direct-current bus voltages Udc8_ f1 and Udc1_ f1 of the highest and lowest gears of the driver handle at a switching frequency f1 point of a low-speed region and a medium-speed region (the direct-current bus voltages Udc8_ f1, Udc7_ f1 … … Udc1_ f1 of each gear of the driver handle at the switching frequency f1 point of the low-speed region and the medium-speed region are known);
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) calculating the direct-current bus voltage Udc1_ fr of the lowest gear of the handle of the driver at any frequency fr point:
4) calculating the direct-current bus voltage Udc8_ fr of the highest gear of the handle of the driver at any frequency fr point:
5) calculating the equivalent bus voltage Udc _ f2 converted from the direct current bus voltage Udc _ fr at any frequency fr point to a rated frequency f2 point:
6) the flux linkage Phir at any frequency fr point is:
wherein K =1/Udc8_ f 2;
(III) when any frequency fr point is between the switching frequency f1 point and zero in the low-speed region and the medium-speed region
1) Acquiring or obtaining direct current bus voltages Udc8_ f1 and Udc1_ f1 of the highest and lowest gears of a handle of a driver at a switching frequency f1 point in a low-speed region and a medium-speed region;
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) calculating an equivalent bus voltage Udc _ f2 converted from the direct current bus voltage Udc _ fr at any frequency fr point to a rated frequency f2 point:
4) the flux linkage Phir at any frequency fr point is:
where K =1/Udc8_ f 2.
The flux linkage setting method can reduce flux linkage of the asynchronous motor when the bus voltage is low, and achieves the purpose of preventing the current loop PI item from being saturated.
The method of the invention completes the 1-8 gear plus-minus gear test and the all-speed range frequency sweep test of each gear by testing one 425kW asynchronous motor. In the test process, when the bus voltage is low, the vector control can still effectively operate. The feasibility and the effectiveness of the method are verified.
Drawings
Fig. 1 is a diagram of the relationship between dc bus voltage and motor speed.
Detailed Description
FIG. 1 is a diagram of the relationship between the voltage of a 1-8-gear typical direct current bus and the rotating speed of an asynchronous motor. The direct current bus voltage of each gear of the handle of the driver at the rated frequency f2 point and the switching frequency f1 point of the low speed region and the medium speed region is determined in the overall design of the system. f1 is the switching frequency between the low speed region and the medium speed region, f2 is the rated frequency, Udc1_ f1 is the 1 st gear bus voltage at the speed f1 point, Udc8_ f1 is the 8 th gear bus voltage at the speed f1 point, Udc1_ f2 is the 1 st gear bus voltage at the speed f2 point, and Udc8_ f2 is the 8 th gear bus voltage at the speed f2 point. The above parameters are known. Udc _ fr is the bus voltage at any point fr, with normal values within the envelope of the 1 and 8 step voltage curves.
The method for giving the flux linkage of the asynchronous motor of the diesel locomotive is realized by the following steps:
when any frequency fr point is above the rated frequency f2 point
1) Collecting or acquiring direct-current bus voltage Udc8_ f2 of the highest gear of a handle of a driver at a rated frequency f2 point;
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) the flux linkage Phir at any frequency fr point is:
wherein K =1/Udc8_ f 2;
when any frequency fr point is between the rated frequency f2 point and the switching frequency f1 points of the low speed region and the middle speed region
1) Acquiring or obtaining direct-current bus voltages Udc8_ f2 and Udc1_ f2 of the highest and lowest gears of a handle of a driver at a rated frequency f2 point and direct-current bus voltages Udc8_ f1 and Udc1_ f1 of the highest and lowest gears of the handle of the driver at a switching frequency f1 point of a low-speed region and a medium-speed region;
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) calculating the direct-current bus voltage Udc1_ fr of the lowest gear of the handle of the driver at any frequency fr point:
4) calculating the direct-current bus voltage Udc8_ fr of the highest gear of the handle of the driver at any frequency fr point:
5) calculating the equivalent bus voltage Udc _ f2 converted from the direct current bus voltage Udc _ fr at any frequency fr point to a rated frequency f2 point:
6) the flux linkage Phir at any frequency fr point is:
wherein K =1/Udc8_ f 2;
(III) when any frequency fr point is between the switching frequency f1 point and zero in the low-speed region and the medium-speed region
1) Acquiring or obtaining direct current bus voltages Udc8_ f1 and Udc1_ f1 of the highest and lowest gears of a handle of a driver at a switching frequency f1 point in a low-speed region and a medium-speed region;
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) calculating an equivalent bus voltage Udc _ f2 converted from the direct current bus voltage Udc _ fr at any frequency fr point to a rated frequency f2 point:
4) the flux linkage Phir at any frequency fr point is:
where K =1/Udc8_ f 2.
Claims (1)
1. A method for giving flux linkage of an asynchronous motor of an internal combustion locomotive is characterized by comprising the following steps:
when any frequency fr point is above the rated frequency f2 point
1) Collecting or acquiring direct-current bus voltage Udc8_ f2 of the highest gear of a handle of a driver at a rated frequency f2 point;
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) the flux linkage Phir at any frequency fr point is:
wherein K =1/Udc8_ f 2;
when any frequency fr point is between the rated frequency f2 point and the switching frequency f1 points of the low speed region and the middle speed region
1) Acquiring or obtaining direct-current bus voltages Udc8_ f2 and Udc1_ f2 of the highest and lowest gears of a handle of a driver at a rated frequency f2 point and direct-current bus voltages Udc8_ f1 and Udc1_ f1 of the highest and lowest gears of the handle of the driver at a switching frequency f1 point of a low-speed region and a medium-speed region;
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) calculating the direct-current bus voltage Udc1_ fr of the lowest gear of the handle of the driver at any frequency fr point:
4) calculating the direct-current bus voltage Udc8_ fr of the highest gear of the handle of the driver at any frequency fr point:
5) calculating the equivalent bus voltage Udc _ f2 converted from the direct current bus voltage Udc _ fr at any frequency fr point to a rated frequency f2 point:
6) the flux linkage Phir at any frequency fr point is:
wherein K =1/Udc8_ f 2;
(III) when any frequency fr point is between the switching frequency f1 point and zero in the low-speed region and the medium-speed region
1) Acquiring or obtaining direct current bus voltages Udc8_ f1 and Udc1_ f1 of the highest and lowest gears of a handle of a driver at a switching frequency f1 point in a low-speed region and a medium-speed region;
2) collecting direct-current bus voltage Udc _ fr of any frequency fr point;
3) calculating an equivalent bus voltage Udc _ f2 converted from the direct current bus voltage Udc _ fr at any frequency fr point to a rated frequency f2 point:
4) the flux linkage Phir at any frequency fr point is:
where K =1/Udc8_ f 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711186451.9A CN107834928B (en) | 2017-11-24 | 2017-11-24 | Flux linkage setting method for asynchronous motor of diesel locomotive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711186451.9A CN107834928B (en) | 2017-11-24 | 2017-11-24 | Flux linkage setting method for asynchronous motor of diesel locomotive |
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| CN107834928A CN107834928A (en) | 2018-03-23 |
| CN107834928B true CN107834928B (en) | 2020-06-09 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033098A (en) * | 2001-07-06 | 2003-01-31 | Samsung Electronics Co Ltd | Method of estimating speed of induction motor and magnetic flux of rotor |
| CN1651927A (en) * | 2004-02-05 | 2005-08-10 | 卢骥 | On-line observing method for asynchronous motor magetic chain |
| CN101777868A (en) * | 2010-02-02 | 2010-07-14 | 北京科技大学 | Method and system for driving asynchronous motor servo for robot |
| EP2544358A1 (en) * | 2011-07-08 | 2013-01-09 | ABB Oy | Control system for doubly-fed induction machine |
| CN106026816A (en) * | 2016-07-29 | 2016-10-12 | 东南大学 | Vector control method of axial magnetic field flux switching type hybrid permanent magnet memory motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9893666B2 (en) * | 2015-02-03 | 2018-02-13 | Mitsubishi Electric Research Laboratories, Inc. | Method and system for controlling angular rotor speeds of sensorless induction motors |
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2017
- 2017-11-24 CN CN201711186451.9A patent/CN107834928B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033098A (en) * | 2001-07-06 | 2003-01-31 | Samsung Electronics Co Ltd | Method of estimating speed of induction motor and magnetic flux of rotor |
| CN1651927A (en) * | 2004-02-05 | 2005-08-10 | 卢骥 | On-line observing method for asynchronous motor magetic chain |
| CN101777868A (en) * | 2010-02-02 | 2010-07-14 | 北京科技大学 | Method and system for driving asynchronous motor servo for robot |
| EP2544358A1 (en) * | 2011-07-08 | 2013-01-09 | ABB Oy | Control system for doubly-fed induction machine |
| CN106026816A (en) * | 2016-07-29 | 2016-10-12 | 东南大学 | Vector control method of axial magnetic field flux switching type hybrid permanent magnet memory motor |
Non-Patent Citations (1)
| Title |
|---|
| 基于模糊神经网络无速度传感器异步电机矢量控制研究;刘培刚;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20120415;全文 * |
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