CN103112362A - System and method for designing linear motor of magnetic-levitation train - Google Patents
System and method for designing linear motor of magnetic-levitation train Download PDFInfo
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- CN103112362A CN103112362A CN2013100638183A CN201310063818A CN103112362A CN 103112362 A CN103112362 A CN 103112362A CN 2013100638183 A CN2013100638183 A CN 2013100638183A CN 201310063818 A CN201310063818 A CN 201310063818A CN 103112362 A CN103112362 A CN 103112362A
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Abstract
The invention discloses a system for designing a linear motor of a magnetic-levitation train. The system comprises a gathering module, a first acquisition module and a second acquisition module; the gathering module is used for gathering operating parameters of the magnetic-levitation train and operating parameters of the linear motor in an online manner; the first acquisition module is used for acquiring an actual value of normal force of the linear motor, a theoretical value of the normal force, an actual value of traction of the linear motor and a theoretical value of the traction according to the operating parameters; and the second acquisition module is used for acquiring parameters of the linear motor when a difference value between the actual value of the normal force and the theoretical value of the normal force is smaller than a first threshold value and a difference value between the actual value of the traction and the theoretical value of the traction is smaller than a second threshold value, and the parameters of the linear motor are matched with the actual value of the normal force and the actual value of the traction. The invention further discloses a method for designing the linear motor of the magnetic-levitation train.
Description
Technical field
The present invention relates to the techniques of linear motor field, relate in particular to a kind of design system and method for magnetic-levitation train linear electric motors.
Background technology
Middle low-speed maglev train is mainly to utilize dress electromagnet and the electromagnet on guide rail ON TRAINS to produce electromagnetic attraction, or the dress ON TRAINS electromagnet and the conductor on guide rail do relative motion, utilize electromagnetic induction principle to produce electrodynamic repulsion force, make and keep the gap of 10～15 millimeters between vehicle and guide rail, vehicle just is suspended on guide pass like this, then drives the maglev vehicle operation by linear induction motor system.Due to train suspension operation above rail, rail does not contact with train, makes train not only have a running velocity fast, also has the advantages such as noise is little, vibration is slight.
structure of the linear motion actuator schematic diagram shown in Figure 1, linear electric motors can be directly changed into electric energy straight-line motion mechanical energy, and without any need for the driving device of buffering mechanism, it can be regarded as a rotating machine by radially cutting open, and the generate plane forms, in linear electric motors, the part of corresponding stator is elementary, the part of respective rotor is secondary, logical many phase alternating current in armature winding, just produce a translation alternating magnetic field and become travelling-magnetic-field, stages of labor drives power under the effect of travelling-magnetic-field and secondary permanent magnet, thereby realize the straight-line motion of maglev vehicle movable parts.Magnetic-levitation train adopts the linear electric machine traction operation, and wherein, train is partly installed the stator of linear electric motors, and the secondary induction plate of linear electric motors is aluminium sheet, is laid on F shape rail.
At present, the research of a lot of units and applicable line electric system are arranged both at home and abroad, for data such as linear electric motors normal force, tractive forces, mostly be based on theoretical calculating or design static test and test to obtain.due in middle low-speed maglev train system, with the tractive force of train traction System Dependent and the normal force that the train suspension system is exerted an influence, the meaning that the control design of described traction system and suspension system is had directiveness, but, when magnetic-levitation train is in the dynamic operation situation, also there is no suitable method of measurement accurately to normal force, tractive force measures to obtain normal force, the actual measured value of tractive force, can't verify the calculated value of normal force and tractive force and the accuracy of static test value, thereby can't optimize linear electric motors with the smooth operation of further lifting train.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of design system and method for magnetic-levitation train linear electric motors, by the linear electric motors parameter that normal force and the tractive force that obtains with reality is complementary, utilize these linear electric motors to realize promoting the purpose of magnetic-levitation train smooth operation.
The invention discloses a kind of linear electric motors design system of magnetic-levitation train, comprising:
Acquisition module is for the operational factor of online acquisition magnetic-levitation train and linear electric motors;
The first acquisition module is for obtain normal force actual value and normal force theoretical value and tractive force actual value and the tractive force theoretical value of described linear electric motors according to described operational factor;
The second acquisition module, be used for during less than Second Threshold, obtaining the linear electric motors parameter that is complementary with normal force actual value and tractive force actual value less than the difference of first threshold and tractive force actual value and tractive force theoretical value in the difference of normal force actual value and normal force theoretical value.
Preferably, in said system, described acquisition module comprises:
The vertical force collecting unit is used for utilizing several first pull pressure sensor that evenly are installed on linear motor stator electric to detect each vertical force of described installed position;
The tractive force collecting unit is for the tractive force that utilizes the second pull pressure sensor detection of straight lines motor;
The acceleration/accel collecting unit is used for utilizing the vibration acceleration of vertical acceleration sensor detection of straight lines motor on vertical;
Voltage acquisition unit is used for utilizing the First Line voltage of the first voltage sensor senses linear electric motors, and utilizes the second line voltage of second voltage sensor detection of straight lines motor;
The current acquisition unit is used for utilizing the first-phase electric current of the first current sensor detection of straight lines motor, and utilizes the second-phase electric current of the second current sensor detection of straight lines motor;
The speed acquisition unit is used for utilizing the radar velocity measurement sensor to detect the running velocity of magnetic-levitation train.
Preferably, in said system, described the first acquisition module comprises:
The actual value acquiring unit is used for according to formula F
y=F
yn-m*g-m*a calculates described normal force actual value F
y, and described tractive force collecting unit is detected the tractive force that obtains as described tractive force actual value; Wherein, F
ynDetect each vertical force sum that obtains for described vertical force collecting unit, m is average train weight to each linear electric motors, and a is the vibration acceleration that described acceleration/accel collecting unit detects the magnetic-levitation train that obtains;
The theoretical value acquiring unit, running velocity and the described normal force theoretical value of linear electric motors calculation of parameter and the described tractive force theoretical value of the magnetic-levitation train that first-phase electric current, second-phase electric current, the described speed acquisition unit inspection that obtains for the First Line voltage, the second line voltage, the described current acquisition unit inspection that obtain according to described voltage acquisition unit detection obtains.
Preferably, in said system, described acquisition module also comprises: the side force collecting unit, be used for to utilize two the 3rd pull pressure sensor that are arranged on linear electric motors two ends measure respectively described linear electric motor primary and secondary between side force;
Described system also comprises: first chooses module, is used for choosing the weight that is complementary with described side force to mount pad according to described side force, the described heavy bogie truck that is used for described linear electric motors are fixed in magnetic-levitation train to mount pad.
Preferably, in said system, described acquisition module also comprises: the air gap collecting unit is used for utilizing two air gap sensors to detect respectively the levitating electromagnet at aerotrain two ends and the suspension air gap between track girder;
Described system also comprises: comparison module is used for two suspension air gaps that comparison measurement obtains, and obtains comparative result; Second chooses module, and being used at described comparative result is the difference of two suspension air gaps during greater than the 3rd threshold value, utilizes suspension controller to control suspension system work, so that described difference is less than the 3rd threshold value.
The present invention also provides a kind of magnetic-levitation train linear electric motors method of designing, comprising:
The operational factor of online acquisition magnetic-levitation train and linear electric motors;
Obtain normal force actual value and normal force theoretical value and tractive force actual value and the tractive force theoretical value of described linear electric motors according to described operational factor;
When the difference of normal force actual value and normal force theoretical value during less than Second Threshold, is obtained the linear electric motors parameter that is complementary with normal force actual value and tractive force actual value less than the difference of first threshold and tractive force actual value and tractive force theoretical value.
Preferably, in said method, the operational factor of described online acquisition magnetic-levitation train and linear electric motors comprises:
Utilize several first pull pressure sensor that evenly are installed on linear motor stator electric to detect each vertical force of described installed position;
Utilize the tractive force of the second pull pressure sensor detection of straight lines motor;
Utilize the vibration acceleration of vertical acceleration sensor detection of straight lines motor on vertical;
Utilize the First Line voltage of the first voltage sensor senses linear electric motors, and utilize the second line voltage of second voltage sensor detection of straight lines motor;
Utilize the first-phase electric current of the first current sensor detection of straight lines motor, and utilize the second-phase electric current of the second current sensor detection of straight lines motor;
Utilize the radar velocity measurement sensor to detect the running velocity of magnetic-levitation train.
Preferably, in said method, described normal force actual value and the normal force theoretical value of obtaining described linear electric motors according to described operational factor comprises with tractive force actual value and tractive force theoretical value:
According to formula F
y=F
yn-m*g-m*a calculates described normal force actual value F
y, and the tractive force that described detection is obtained is as described tractive force actual value; Wherein, F
ynBe each vertical force sum that described detection obtains, m is the average train weight to each linear electric motors, and a is the vibration acceleration of the magnetic-levitation train that obtains of described detection;
Running velocity and the described normal force theoretical value of linear electric motors calculation of parameter and described tractive force theoretical value according to First Line voltage, the second line voltage, first-phase electric current, second-phase electric current, magnetic-levitation train.
Preferably, in said method, described method also comprises:
Two the 3rd pull pressure sensor that utilization is arranged on linear electric motors two ends measure respectively described linear electric motor primary and secondary between side force;
Choose the weight that is complementary with described side force to mount pad according to described side force, the described heavy bogie truck that is used for described linear electric motors are fixed in magnetic-levitation train to mount pad.
Preferably, said method also comprises:
Utilize two air gap sensors to detect respectively the levitating electromagnet at aerotrain two ends and the suspension air gap between track girder;
Two suspension air gaps that comparison measurement obtains, and obtain comparative result;
Be the difference of two suspension air gaps during greater than the 3rd threshold value at described comparative result, utilize suspension controller to control suspension system work, so that described difference is less than the 3rd threshold value.
the design system of magnetic-levitation train linear electric motors of the present invention and method, data by the relevant linear electric motors dynamic characteristics of on-line measurement, namely measure normal force and tractive force, whether check the tractive force observed reading relevant to traction system conforms to the tractive force theoretical value, and whether the normal force observed reading that check exerts an influence to suspension system conforms to the normal force theoretical value, if conform to, choose the linear electric motors parameter that tractive force and normal force with reality are complementary, with utilize these linear electric motors further improve in the traction system of low speed magnetic suspension train and the design control level of suspension system smooth operation.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structure of the linear motion actuator schematic diagram;
Fig. 2 is the structural representation of the embodiment 1 of magnetic-levitation train linear electric motors design system of the present invention;
Fig. 3 is the structural representation of the embodiment 2 of magnetic-levitation train linear electric motors design system of the present invention;
Fig. 4 is linear electric motors voltage and current measurement figure of the present invention;
Fig. 5 is suspension air gap position view of the present invention;
Fig. 6 is the schematic flow sheet of magnetic-levitation train linear electric motors method of designing of the present invention.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Shown in Figure 2, Fig. 2 is the structural representation of the embodiment 1 of a kind of magnetic-levitation train linear electric motors design system provided by the invention, and this system comprises:
Acquisition module 1 is for the operational factor of online acquisition magnetic-levitation train and linear electric motors.
The first acquisition module 2 is for obtain normal force actual value and normal force theoretical value and tractive force actual value and the tractive force theoretical value of described linear electric motors according to described operational factor.
The second acquisition module 3, be used for during less than Second Threshold, obtaining the linear electric motors parameter that is complementary with normal force actual value and tractive force actual value less than the difference of first threshold and tractive force actual value and tractive force theoretical value in the difference of normal force actual value and normal force theoretical value.
in the second acquisition module 3, at first obtain corresponding normal force and the tractive force of the different running velocitys of magnetic-levitation train, actual measured value and the calculated value of normal force are compared, and the actual measured value of tractive force is compared with calculated value (for example: calculate the difference of normal force actual value corresponding to each velocity amplitude and normal force theoretical value as the normal force comparative result, and the difference of calculated tractive effort actual value and tractive force theoretical value is as the tractive force comparative result, or utilize other method compare all can), analyze normal force by described comparative result, whether the tractive force power speed curve are consistent with the velocity curve trend that calculates, if trend basically identical (for example: the measurement difference between actual value and theoretical value is in ± 200N), think and conform to, proof is in the linear electric motors design that is applied to guideway vehicle, can design linear electric motors according to actual measured value, namely utilize actual measured value to obtain the linear electric motors parameter, the linear electric motors parameter that utilization is obtained designs the required linear electric motors of magnetic-levitation train, can promote the performance of magnetic-levitation train.
Shown in Figure 3, Fig. 3 is the structural representation of the embodiment 2 of a kind of magnetic-levitation train linear electric motors design system provided by the invention.
Wherein, the acquisition module 1 in above-described embodiment 1 comprises:
Vertical force collecting unit 11 is used for utilizing several first pull pressure sensor that evenly are installed on linear motor stator electric to detect each vertical force of described installed position.For example: evenly choose 8 positions on stator, set up two rows separately, position, every 4 positions is 1 row, utilize n=8 the first pull pressure sensor to measure respectively the vertical force Fy1 of above-mentioned 8 positions, Fy2......Fyn, the position is chosen mode and is not limited to this certainly, also comprises other derivative class mode.
Tractive force collecting unit 12 is for the tractive force Fx that utilizes the second pull pressure sensor detection of straight lines motor.
Described the first pull pressure sensor or the second pull pressure sensor, but the pulling force that the detecting sensor installed position produces because linear electric motors vibrate or the variable quantity of pressure, and obtain according to detected pulling force and pressure signal the current signal that characterizes described vertical force or tractive force size.
Acceleration/accel collecting unit 13 is used for utilizing the vibration acceleration a of vertical acceleration sensor detection of straight lines motor on vertical.
The vertical acceleration sensor is a kind of variable capacitance accelerometer, fix ON TRAINS, when producing vibration in train travelling process, so just there has been a force of inertia to act on accelerometer, amplitude and the frequency of final output train vibration, thus can utilize the amplitude of output and frequency just can obtain the vibration acceleration a of linear electric motors on vertical.
Linear electric motors voltage and current measurement figure shown in Figure 4, choose any two phase currents of linear electric motors, for example: choose first-phase electric current I 1 and second-phase electric current I 2 in diagram, and choose the First Line voltage U 1 corresponding with first-phase electric current I 1 and second-phase electric current I 2 and the second line voltage U 2.
The principle of work of radar velocity measurement sensor: in the magnetic-levitation train operational process, launch earthward radar wave, after radar wave is returned from ground return, can produce a frequency offset signals proportional to train speed, by just obtaining the running velocity V of train after described shifted signal is processed.
Wherein, the first acquisition module 2 in above-described embodiment 1 comprises:
Actual value acquiring unit 21 is used for according to formula F
y=F
yn-m*g-m*a calculates described normal force actual value F
y, and described tractive force collecting unit 12 is detected the tractive force that obtains as described tractive force actual value; Wherein, F
ynFor described vertical force collecting unit 11 detects each vertical force sum, the i.e. F that obtains
yn=Fy1+Fy2......Fyn, m is average train weight (quality that comprises linear electric motors itself) to each linear electric motors, a is the vibration acceleration that described acceleration/accel collecting unit 13 detects the magnetic-levitation train that obtains.
Theoretical value acquiring unit 22, running velocity and the described normal force theoretical value of linear electric motors calculation of parameter and the described tractive force theoretical value of the magnetic-levitation train that first-phase electric current, second-phase electric current, unit 16 detections of described speed acquisition that First Line voltage, the second line voltage, unit 15 detections of described current acquisition that are used for obtaining according to described voltage acquisition unit 14 detections obtain obtain.
Calculate by the following method normal force theoretical value and described tractive force theoretical value:
Obtain the linear electric motors parameter, comprising: number of poles, pole span, folded thick, total groove number unshakable in one's determination, coil pitch, often the be in series number of turn, gas length, aluminium plate thickness, secondary every limit stretched out the parameters such as width.After utilizing the running velocity of First Line voltage, the second line voltage, first-phase electric current, second-phase electric current, magnetic-levitation train and described linear electric motors parameter to calculate, can get:
The normal force theoretical value:
The tractive force theoretical value:
In formula (1), (2), μ
0Be air permeability, J
1Be primary electrical fluid layer density amplitude, s is slip, G
2-3Be the linear electric motors Q factor,
(τ is pole span), δ is the electromagnetism air gap.
In addition, described acquisition module 1 also comprises: side force collecting unit 17, be used for to utilize two the 3rd pull pressure sensor that are arranged on linear electric motors two ends measure respectively described linear electric motor primary and secondary between side force; Described system also comprises: first chooses module 4, is used for choosing the weight that is complementary with described side force to mount pad according to described side force, the described heavy bogie truck that is used for described linear electric motors are fixed in magnetic-levitation train to mount pad.
Linear electric motors in motion process, electric motor primary and secondary between the side force that produces detected by 2 pull pressure sensor and obtain side force L1, L2.Under perfect condition, 2 side forces should be equal-sized, and this moment, the elementary and secondary of linear electric motors alignd mutually.But in actual moving process, the straight-line electric chance produces vibration, when described vibration causes linear electric motors that skew occurs, for example linear electric motors one end remains on the home position, the other end is offset, to cause the primary and secondary of linear electric motors mutually not line up, need the side force of test linear electric motors this moment, so 2 side direction sensors need to be arranged, larger to record which end side-play amount, perhaps stressed larger, thus the weight that conforms to this side force chosen to mount pad according to the side force that records, keep in real time balance with the two ends that guarantee linear electric motors.
In addition, described acquisition module 1 also comprises: air gap collecting unit 18 is used for utilizing two air gap sensors to detect respectively levitating electromagnet and the suspension air gap between track girder (suspension air gap position view shown in Figure 5) at aerotrain two ends; Described system also comprises: comparison module 5 is used for two suspension air gaps that comparison measurement obtains, and obtains comparative result; Second chooses module 6, and being used at described comparative result is the difference of two suspension air gaps during greater than the 3rd threshold value, utilizes suspension controller to control suspension system work, so that described difference is less than the 3rd threshold value.
Air gap sensors is measured the measured body surface with respect to the variation of probe end clearance by probe, exports the size that corresponding current signal characterizes suspension air gap, after suspension air gap refers to middle low-speed maglev train floating, and the distance between levitating electromagnet and track.The suspension air gap of two suspension air gap sensor measurements is mainly for mutual correction, and is wrong to prevent sensor output; Whether another effect is consistent in order to the height that judges train two ends and float, if fluctuation height is inconsistent, must adjust suspension controller, is in state of equilibrium when guaranteeing that train floats, and namely controls the purpose that the suspension air gap of realizing train two ends equates.
the design system of magnetic-levitation train linear electric motors of the present invention, data by the relevant linear electric motors dynamic characteristics of on-line measurement, namely measure normal force and tractive force, whether check the tractive force observed reading relevant to traction system conforms to the tractive force theoretical value, and whether the normal force observed reading that check exerts an influence to suspension system conforms to the normal force theoretical value, if conform to, choose the linear electric motors parameter that tractive force and normal force with reality are complementary, with utilize these linear electric motors further improve in the traction system of low speed magnetic suspension train and the design control level of suspension system smooth operation.
Described referring to Fig. 6, Fig. 6 is the schematic flow sheet of a kind of magnetic-levitation train linear electric motors method of designing provided by the invention, realizes that the step of the method comprises:
601: the operational factor of online acquisition magnetic-levitation train and linear electric motors;
Wherein, utilize following each sensor performing step 601, with the purpose of the operational factor of realizing online acquisition magnetic-levitation train and linear electric motors:
Utilize several first pull pressure sensor that evenly are installed on linear motor stator electric to detect each vertical force of described installed position; Utilize the tractive force of the second pull pressure sensor detection of straight lines motor; Utilize the vibration acceleration of vertical acceleration sensor detection of straight lines motor on vertical; Utilize the First Line voltage of the first voltage sensor senses linear electric motors, and utilize the second line voltage of second voltage sensor detection of straight lines motor; Utilize the first-phase electric current of the first current sensor detection of straight lines motor, and utilize the second-phase electric current of the second current sensor detection of straight lines motor; Utilize the radar velocity measurement sensor to detect the running velocity of magnetic-levitation train.
602: normal force actual value and normal force theoretical value and tractive force actual value and the tractive force theoretical value of obtaining described linear electric motors according to described operational factor;
Wherein, adopt following manner performing step 602, specific implementation is as follows:
According to formula F
y=F
yn-m*g-m*a calculates described normal force actual value F
y, and the tractive force that described detection is obtained is as described tractive force actual value; Wherein, F
ynBe each vertical force sum that described detection obtains, m is the average train weight (quality that comprises linear electric motors itself) to each linear electric motors, and a is the vibration acceleration of the magnetic-levitation train that obtains of described detection.
Running velocity and the described normal force theoretical value of linear electric motors calculation of parameter and described tractive force theoretical value according to First Line voltage, the second line voltage, first-phase electric current, second-phase electric current, magnetic-levitation train:
The normal force theoretical value:
The tractive force theoretical value:
In formula (1), (2), μ
0Be air permeability, J
1Be primary electrical fluid layer density amplitude, s is slip, G
2-3Be the linear electric motors Q factor,
(τ is pole span), δ is the electromagnetism air gap.
603: when the difference of normal force actual value and normal force theoretical value during less than Second Threshold, is obtained the linear electric motors parameter that is complementary with normal force actual value and tractive force actual value less than the difference of first threshold and tractive force actual value and tractive force theoretical value.
Obtain corresponding normal force and the tractive force of the different running velocitys of magnetic-levitation train, actual measured value and the calculated value of normal force are compared, and actual measured value and the calculated value of tractive force compared, by described comparative result analyze normal force, whether the tractive force power speed curve consistent with the velocity curve trend that calculates, if trend is basically identical, can utilize actual measured value to obtain the linear electric motors parameter, and utilize the linear electric motors parameter of obtaining to design the required linear electric motors of magnetic-levitation train.
In addition, said method also comprises:
Two the 3rd pull pressure sensor that utilization is arranged on linear electric motors two ends measure respectively described linear electric motor primary and secondary between side force; And choose the weight that is complementary with described side force to mount pad according to described side force, the described heavy bogie truck that is used for described linear electric motors are fixed in magnetic-levitation train to mount pad.
In addition, said method also comprises:
Utilize two air gap sensors to detect respectively the levitating electromagnet at aerotrain two ends and the suspension air gap between track girder; And two suspension air gaps obtaining of comparison measurement, and obtain comparative result; Be the difference of two suspension air gaps during greater than the 3rd threshold value at described comparative result, utilize suspension controller to control suspension system work, so that described difference is less than the 3rd threshold value.
the method of designing of magnetic-levitation train linear electric motors of the present invention, data by the relevant linear electric motors dynamic characteristics of on-line measurement, namely measure normal force and tractive force, whether check the tractive force observed reading relevant to traction system conforms to the tractive force theoretical value, and whether the normal force observed reading that check exerts an influence to suspension system conforms to the normal force theoretical value, if conform to, choose the linear electric motors parameter that tractive force and normal force with reality are complementary, with utilize these linear electric motors further improve in the traction system of low speed magnetic suspension train and the design control level of suspension system smooth operation.
Need to prove, in this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For the disclosed method of embodiment, because it is corresponding with embodiment disclosed system, so describe fairly simple, relevant part gets final product referring to the components of system as directed explanation.
Also need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are separated with another entity or operational zone, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, article or the equipment that comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the linear electric motors design system of a magnetic-levitation train, is characterized in that, comprising:
Acquisition module is for the operational factor of online acquisition magnetic-levitation train and linear electric motors;
The first acquisition module is for obtain normal force actual value and normal force theoretical value and tractive force actual value and the tractive force theoretical value of described linear electric motors according to described operational factor;
The second acquisition module, be used for during less than Second Threshold, obtaining the linear electric motors parameter that is complementary with normal force actual value and tractive force actual value less than the difference of first threshold and tractive force actual value and tractive force theoretical value in the difference of normal force actual value and normal force theoretical value.
2. system according to claim 1, is characterized in that, described acquisition module comprises:
The vertical force collecting unit is used for utilizing several first pull pressure sensor that evenly are installed on linear motor stator electric to detect each vertical force of described installed position;
The tractive force collecting unit is for the tractive force that utilizes the second pull pressure sensor detection of straight lines motor;
The acceleration/accel collecting unit is used for utilizing the vibration acceleration of vertical acceleration sensor detection of straight lines motor on vertical;
Voltage acquisition unit is used for utilizing the First Line voltage of the first voltage sensor senses linear electric motors, and utilizes the second line voltage of second voltage sensor detection of straight lines motor;
The current acquisition unit is used for utilizing the first-phase electric current of the first current sensor detection of straight lines motor, and utilizes the second-phase electric current of the second current sensor detection of straight lines motor;
The speed acquisition unit is used for utilizing the radar velocity measurement sensor to detect the running velocity of magnetic-levitation train.
3. system according to claim 2, is characterized in that, described the first acquisition module comprises:
The actual value acquiring unit is used for according to formula F
y=F
yn-m*g-m*a calculates described normal force actual value F
y, and described tractive force collecting unit is detected the tractive force that obtains as described tractive force actual value; Wherein, F
ynDetect each vertical force sum that obtains for described vertical force collecting unit, m is average train weight to each linear electric motors, and a is the vibration acceleration that described acceleration/accel collecting unit detects the magnetic-levitation train that obtains;
The theoretical value acquiring unit, running velocity and the described normal force theoretical value of linear electric motors calculation of parameter and the described tractive force theoretical value of the magnetic-levitation train that first-phase electric current, second-phase electric current, the described speed acquisition unit inspection that obtains for the First Line voltage, the second line voltage, the described current acquisition unit inspection that obtain according to described voltage acquisition unit detection obtains.
4. system according to claim 1, it is characterized in that, described acquisition module also comprises: the side force collecting unit, be used for to utilize two the 3rd pull pressure sensor that are arranged on linear electric motors two ends measure respectively described linear electric motor primary and secondary between side force;
Described system also comprises:
First chooses module, is used for choosing the weight that is complementary with described side force to mount pad according to described side force, the described heavy bogie truck that is used for described linear electric motors are fixed in magnetic-levitation train to mount pad.
5. system according to claim 1, is characterized in that, described acquisition module also comprises: the air gap collecting unit is used for utilizing two air gap sensors to detect respectively the levitating electromagnet at aerotrain two ends and the suspension air gap between track girder;
Described system also comprises:
Comparison module is used for two suspension air gaps that comparison measurement obtains, and obtains comparative result;
Second chooses module, and being used at described comparative result is the difference of two suspension air gaps during greater than the 3rd threshold value, utilizes suspension controller to control suspension system work, so that described difference is less than the 3rd threshold value.
6. a magnetic-levitation train linear electric motors method of designing, is characterized in that, comprising:
The operational factor of online acquisition magnetic-levitation train and linear electric motors;
Obtain normal force actual value and normal force theoretical value and tractive force actual value and the tractive force theoretical value of described linear electric motors according to described operational factor;
When the difference of normal force actual value and normal force theoretical value during less than Second Threshold, is obtained the linear electric motors parameter that is complementary with normal force actual value and tractive force actual value less than the difference of first threshold and tractive force actual value and tractive force theoretical value.
7. method according to claim 6, is characterized in that, the operational factor of described online acquisition magnetic-levitation train and linear electric motors comprises:
Utilize several first pull pressure sensor that evenly are installed on linear motor stator electric to detect each vertical force of described installed position;
Utilize the tractive force of the second pull pressure sensor detection of straight lines motor;
Utilize the vibration acceleration of vertical acceleration sensor detection of straight lines motor on vertical;
Utilize the First Line voltage of the first voltage sensor senses linear electric motors, and utilize the second line voltage of second voltage sensor detection of straight lines motor;
Utilize the first-phase electric current of the first current sensor detection of straight lines motor, and utilize the second-phase electric current of the second current sensor detection of straight lines motor;
Utilize the radar velocity measurement sensor to detect the running velocity of magnetic-levitation train.
8. method according to claim 7, is characterized in that, described normal force actual value and the normal force theoretical value of obtaining described linear electric motors according to described operational factor comprises with tractive force actual value and tractive force theoretical value:
According to formula F
y=F
yn-m*g-m*a calculates described normal force actual value F
y, and the tractive force that described detection is obtained is as described tractive force actual value; Wherein, F
ynBe each vertical force sum that described detection obtains, m is the average train weight to each linear electric motors, and a is the vibration acceleration of the magnetic-levitation train that obtains of described detection;
Running velocity and the described normal force theoretical value of linear electric motors calculation of parameter and described tractive force theoretical value according to First Line voltage, the second line voltage, first-phase electric current, second-phase electric current, magnetic-levitation train.
9. method according to claim 6, is characterized in that, described method also comprises:
Two the 3rd pull pressure sensor that utilization is arranged on linear electric motors two ends measure respectively described linear electric motor primary and secondary between side force;
Choose the weight that is complementary with described side force to mount pad according to described side force, the described heavy bogie truck that is used for described linear electric motors are fixed in magnetic-levitation train to mount pad.
10. method according to claim 6, is characterized in that, described method also comprises:
Utilize two air gap sensors to detect respectively the levitating electromagnet at aerotrain two ends and the suspension air gap between track girder;
Two suspension air gaps that comparison measurement obtains, and obtain comparative result;
Be the difference of two suspension air gaps during greater than the 3rd threshold value at described comparative result, utilize suspension controller to control suspension system work, so that described difference is less than the 3rd threshold value.
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