CN110667400B - Method for restraining temperature rise of asynchronous motor bearing of alternating current-direct current-alternating current electric motor train unit - Google Patents
Method for restraining temperature rise of asynchronous motor bearing of alternating current-direct current-alternating current electric motor train unit Download PDFInfo
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- CN110667400B CN110667400B CN201910895412.9A CN201910895412A CN110667400B CN 110667400 B CN110667400 B CN 110667400B CN 201910895412 A CN201910895412 A CN 201910895412A CN 110667400 B CN110667400 B CN 110667400B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/32—Control or regulation of multiple-unit electrically-propelled vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/425—Temperature
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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
- Y02T10/72—Electric energy management in electromobility
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- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
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Abstract
A method for restraining motor bearing temperature rise by an AC-DC-AC electric motor train unit traction converter is characterized by detecting rotating speed signals speed1, speed2, speed3 and speed4 of 4 motors and a vehicle speed signal n of a whole vehicle in real time, and respectively calculating absolute values of difference values of n-speed1, n-speed2, n-speed3 and n-speed 4; if the absolute value of the difference of any item is larger than a preset threshold signal Fset, the actual given torque value of the motor is reduced by 10 percent, otherwise, the actual given torque value of the motor is increased by 10 percent; the motor torque value after the increase and decrease judgment is subjected to torque amplitude limiting processing to be used as an actual torque output value Te, meanwhile, the actual torque output value Te is compared with a given motor torque value Te, and the smaller value is used as an actual given value of the motor torque and is used as the actual given value of the motor torque of the next judgment period; the invention solves the problem that the motor with lower speed is in a serious overload state due to unbalanced load distribution caused by the problems of wheel diameter, adhesion and the like of the AC-DC-AC electric motor train unit, and effectively inhibits the temperature rise of the motor bearing.
Description
Technical Field
The invention belongs to the technical field of asynchronous motor bearing temperature control, and particularly relates to a method for restraining the temperature rise of an asynchronous motor bearing of an alternating current-direct current-alternating current electric motor train unit.
Background
China has developed a railway network after years of high-speed railway construction, and the railway network which is the headmost in the world at present and is the four-way eight-reach railway network connects all parts of China into a whole.
In order to save train body space and reduce train purchasing cost, a motor train unit traction transmission system widely adopts a train control mode, and one traction converter drives all parallel traction asynchronous motors of the same motor train.
Due to manufacturing errors and different degrees of abrasion of wheel sets of the motor train unit in the running process, different degrees of difference exist in parameters of traction asynchronous motors and diameters of wheel sets of a train bogie, the phenomenon of unbalanced load distribution among traction asynchronous motors running in parallel is inevitably caused, the individual asynchronous motors are seriously overloaded due to uneven load distribution, the temperature rise of the asynchronous motors is overhigh when the asynchronous motors are light, and idling or sliding when the load distribution exceeds the adhesion limit when the load distribution is heavy, so that the wheels of the motor train unit are scratched.
Disclosure of Invention
The invention aims to provide a method for restraining the temperature rise of an asynchronous motor bearing of an AC-DC-AC electric motor train unit, which solves the problem of unbalanced load in a train control mode.
The purpose of the invention is realized by the following technical scheme:
a method for restraining temperature rise of bearings of asynchronous motors of an AC-DC-AC electric motor train unit comprises the following steps:
s1: detecting rotating speed signals speed1, speed2, speed3 and speed4 of the four asynchronous motors and a vehicle speed signal n of the whole vehicle in real time;
s2: respectively calculating the absolute values of the differences of the n-speed1, the n-speed2, the n-speed3 and the n-speed 4;
s3: selecting a slip frequency threshold value Fset, and comparing the speed value of the whole vehicle with the rotating speed values of 4 asynchronous motors respectively;
if the absolute value of the difference of any item is larger than a preset threshold signal Fset, the actual torque given value of the asynchronous motor is reduced by 10 percent, otherwise, the actual torque given value of the asynchronous motor is increased by 10 percent;
s4: the torque value of the asynchronous motor after the increase and decrease judgment is processed is used as an actual torque output value Te after the torque amplitude limiting processing;
s5: giving an asynchronous motor torque value Te;
s6: and comparing the actual torque output value Te with the given asynchronous motor torque value Te, taking the smaller one as the actual given value of the asynchronous motor torque, and taking the smaller one as the actual given value of the asynchronous motor torque of the next judgment period.
Further: the torque formula Te under the constant magnetic flux control mode of the asynchronous motor can be written as follows:
wherein R iss、RrStator and rotor resistances, U, respectivelysIs the stator-side phase voltage, Xls、XlrLeakage inductance, X, of the stator and rotor, respectivelymIs the excitation reactance, s is the slip, m is the number of stator phases of the asynchronous motor, npThe number of pole pairs of the asynchronous motor is; in AC drive traction control systems, sR is typically small, since the slip s is nowsAnd s2·(Xls+Xlr)2The term is negligible and equation (1) can be simplified as:
from equation (2), it can be seen that at stator voltage UsAnd frequency fsThe torque Te is influenced by the asynchronous machine parameter R under certain conditionsrAnd the influence of slip s; under the condition that the asynchronous motor parameters are fixed, the slip ratio s and the torque Te are in a direct proportion relation, and the output of the torque Te can be controlled by controlling the slip ratio s.
Compared with the prior art, the beneficial effect that this application has is:
the problem of serious overload of individual asynchronous motors caused by unbalanced load in a vehicle control mode is solved, the bearing temperature rise of a traction motor is reduced, the service life of asynchronous motor bearings is effectively prolonged, and the carrying capacity of an electric motor train unit is improved.
Drawings
FIG. 1 is a schematic diagram of a vehicle control structure of an integral 1-phase reverse of an AC-DC-AC electric multiple unit 2;
FIG. 2 is a flow chart of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the overall 1-inverse vehicle control structure of the ac-dc-ac electric multiple unit train 2 includes a large plate, a pre-charging module, a four-quadrant rectifying module, a chopper module, a ground detection module and an inverter module, wherein the pre-charging module includes a charging resistor R1, a pre-charging contactor K11 and a main contactor K1, and the pre-charging module 1 and the pre-charging module 2 have the same structure.
The four-quadrant rectifier module comprises g1, g2, g3 and g 44 switching tubes, and the four-quadrant rectifier module 1 and the four-quadrant rectifier module 2 are identical in structure.
The chopping module comprises a chopping switch tube g5, a chopping current sensor A2, a reverse diode D1 and a chopping resistor R5.
The grounding detection module comprises resistors R3 and R4, the resistance value of R3 is equal to R4, and the resistors R3 and R4 are connected in series at two ends of the direct current loop to form a grounding resistance monitoring loop.
The inversion module comprises a 3-phase inversion circuit consisting of g6, g7, g8, g9, g10 and g11 switching tubes, and the output of 3-phase inversion is connected with 4 asynchronous traction motors in parallel.
M is 4 asynchronous motors with the same characteristics, C1 and C3 are direct-current side supporting capacitors, R2 is a slow-release resistor, U1 is a direct-current bus voltage sensor, and U2 is a grounding voltage sensor.
A method for restraining temperature rise of bearings of asynchronous motors of an AC-DC-AC electric motor train unit comprises the following steps:
s1: the speed signals speed1, speed2, speed3 and speed4 of the asynchronous traction motor and the vehicle speed signal n of the whole vehicle are detected every 400 microseconds.
S2: the absolute values of the differences were calculated for n-speed1, n-speed2, n-speed3, and n-speed4, respectively.
S3: and selecting a slip frequency threshold value Fset, and comparing the speed value of the whole vehicle with the rotating speed values of 4 asynchronous motors respectively.
When any one of the absolute values of the difference values of the n-speed1, the n-speed2, the n-speed3 and the n-speed4 is larger than a preset threshold signal Fset (namely, the amplitude limit of the slip frequency), the actual torque set value of the asynchronous motor is reduced by 10%, otherwise, the actual torque set value of the asynchronous motor is increased by 10%.
S4: the torque value of the asynchronous motor after the increase and decrease judgment is processed is used as an actual torque output value Te after the torque amplitude limiting processing;
s5: giving an asynchronous motor torque value Te;
s6: and comparing the actual torque output value Te with the given asynchronous motor torque value Te, taking the smaller one as the actual given value of the asynchronous motor torque, and taking the smaller one as the actual given value of the asynchronous motor torque of the next judgment period.
Wherein, the torque formula Te under the permanent magnetic flux control mode of the asynchronous motor can be written as:
wherein R iss、RrStator and rotor resistances, U, respectivelysIs the stator-side phase voltage, Xls、XlrLeakage inductance, X, of the stator and rotor, respectivelymIs the excitation reactance, s is the slip, m is the number of stator phases of the asynchronous motor, npThe number of pole pairs of the asynchronous motor is; in AC drive traction control systems, sR is typically small, since the slip s is nowsAnd s2·(Xls+Xlr)2The term is negligible and equation (1) can be simplified as:
from equation (2), it can be seen that at stator voltage UsAnd frequency fsThe torque Te is influenced by the asynchronous machine parameter R under certain conditionsrAnd the influence of slip s; under the condition that the asynchronous motor parameters are fixed, the slip ratio s and the torque Te are in a direct proportion relation, and the output of the torque Te can be controlled by controlling the slip ratio s.
The invention solves the problem of serious overload of individual asynchronous motors caused by unbalanced load in a vehicle control mode, reduces the bearing temperature rise of the traction motor, effectively improves the service life of the asynchronous motor bearing, and improves the carrying capacity of the electric multiple unit.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It is to be understood that the present application is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (2)
1. A method for restraining temperature rise of bearings of asynchronous motors of an AC-DC-AC electric motor train unit comprises the following steps:
s1: detecting rotating speed signals speed1, speed2, speed3 and speed4 of the four asynchronous motors and a vehicle speed signal n of the whole vehicle in real time;
s2: respectively calculating the absolute values of the differences of the n-speed1, the n-speed2, the n-speed3 and the n-speed 4;
s3: selecting a slip frequency threshold value Fset, and comparing the speed value of the whole vehicle with the rotating speed values of 4 asynchronous motors respectively;
if the absolute value of the difference of any item is larger than a preset threshold signal Fset, the actual torque given value of the asynchronous motor is reduced by 10 percent, otherwise, the actual torque given value of the asynchronous motor is increased by 10 percent;
s4: the torque value of the asynchronous motor after the increase and decrease judgment is processed is used as an actual torque output value Te after the torque amplitude limiting processing;
s5: giving an asynchronous motor torque value Te;
s6: and comparing the actual torque output value Te with the given asynchronous motor torque value Te, taking the smaller one as the actual given value of the asynchronous motor torque, and taking the smaller one as the actual given value of the asynchronous motor torque of the next judgment period.
2. The method of restraining the bearing temperature rise of the AC-DC-AC electric multiple unit according to claim 1,
the torque formula Te under the constant magnetic flux control mode of the asynchronous motor can be written as follows:
wherein R iss、RrStator and rotor resistances, U, respectivelysIs the stator-side phase voltage, Xls、XlrLeakage inductance, X, of the stator and rotor, respectivelymIs the excitation reactance, s is the slip, m is the number of stator phases of the asynchronous motor, npThe number of pole pairs of the asynchronous motor is; in AC drive traction control systems, sR is typically small, since the slip s is nowsAnd s2·(Xls+Xlr)2The term is negligible and equation (1) can be simplified as:
from equation (2), it can be seen that at stator voltage UsAnd frequency fsThe torque Te is influenced by the asynchronous machine parameter R under certain conditionsrAnd the influence of slip s; under the condition that the asynchronous motor parameters are fixed, the slip ratio s and the torque Te are in a direct proportion relation, and the output of the torque Te can be controlled by controlling the slip ratio s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910895412.9A CN110667400B (en) | 2019-09-21 | 2019-09-21 | Method for restraining temperature rise of asynchronous motor bearing of alternating current-direct current-alternating current electric motor train unit |
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| CN201910895412.9A CN110667400B (en) | 2019-09-21 | 2019-09-21 | Method for restraining temperature rise of asynchronous motor bearing of alternating current-direct current-alternating current electric motor train unit |
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| CN110667400B true CN110667400B (en) | 2021-02-02 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267403A (en) * | 2010-05-24 | 2011-12-07 | 丰田自动车株式会社 | Electric vehicle |
| WO2015037588A1 (en) * | 2013-09-13 | 2015-03-19 | ジヤトコ株式会社 | Failure determination device for hybrid vehicles and failure determination method therefor |
| CN106063114A (en) * | 2014-02-21 | 2016-10-26 | 日立汽车***株式会社 | Actuator control device and control method |
| CN109474127A (en) * | 2017-09-08 | 2019-03-15 | 丰田自动车株式会社 | The cooling device of automotive dynamoelectric machine |
| CN208723712U (en) * | 2018-08-14 | 2019-04-09 | 佳木斯电机股份有限公司 | A kind of mixed flow ventilation self-lubricating reduces the structure of motor bearings temperature rise |
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2019
- 2019-09-21 CN CN201910895412.9A patent/CN110667400B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267403A (en) * | 2010-05-24 | 2011-12-07 | 丰田自动车株式会社 | Electric vehicle |
| WO2015037588A1 (en) * | 2013-09-13 | 2015-03-19 | ジヤトコ株式会社 | Failure determination device for hybrid vehicles and failure determination method therefor |
| CN106063114A (en) * | 2014-02-21 | 2016-10-26 | 日立汽车***株式会社 | Actuator control device and control method |
| CN109474127A (en) * | 2017-09-08 | 2019-03-15 | 丰田自动车株式会社 | The cooling device of automotive dynamoelectric machine |
| CN208723712U (en) * | 2018-08-14 | 2019-04-09 | 佳木斯电机股份有限公司 | A kind of mixed flow ventilation self-lubricating reduces the structure of motor bearings temperature rise |
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