阅读说明：本技术 用于超高速长初级直线电机的分段供电系统和方法 (Sectional power supply system and method for the long primary LEM of ultrahigh speed ) 是由 韦克康 毛凯 张艳清 张志华 季旭 康颖 于 2018-05-16 设计创作，主要内容包括：本发明涉及电机供电技术领域,公开了一种用于超高速长初级直线电机的分段供电系统和方法。其中,该系统包括：多个变流器,用于对所述超高速长初级直线电机的多个不等分的定子分段进行供电；检测装置,用于检测所述超高速长初级直线电机的动子的运动位置；控制器,用于根据所述动子的运动位置控制变流器的状态及输出。由此,通过对动子位置进行定位,可以精确控制每一段定子(即,每一定子分段)开通关断(例如,通断电)的时机以及变流器的输出大小,从而实现对超高速长初级直线电机的定子逐段切换供电。(The present invention relates to motor power supply technique fields, disclose a kind of sectional power supply system and method for the long primary LEM of ultrahigh speed.Wherein, which includes: multiple current transformers, and the stator-sectional for multiple not equal parts to the long primary LEM of the ultrahigh speed is powered；Detection device, the movement position of the mover for detecting the long primary LEM of the ultrahigh speed；Controller, for controlling the state and output of current transformer according to the movement position of the mover.Thus, by being positioned to rotor position, each section of stator can accurately be controlled (i.e., each stator-sectional) open shutdown (such as, power on/off) opportunity and current transformer output size, thus realize power supply is switched paragraph by paragraph to the stator of the long primary LEM of ultrahigh speed.)

1. a kind of sectional power supply system for the long primary LEM of ultrahigh speed, which is characterized in that the system includes:

Multiple current transformers, the stator-sectional for multiple not equal parts to the long primary LEM of the ultrahigh speed are powered；

Detection device, the movement position of the mover for detecting the long primary LEM of the ultrahigh speed；

Controller, for controlling the state and output of current transformer according to the movement position of the mover.

2. system according to claim 1, which is characterized in that the controller is controlled according to the movement position of the mover The state of current transformer and output include:

In the case where the movement position of the mover is that the mover is run in current stator-sectional, the controller control Current transformer power supply corresponding with the current stator-sectional and rated output, remaining current transformer are not powered；

The movement position of the mover be described mover a part be moved into next stator-sectional and a part stay in it is described In the case where current stator-sectional, controller control current transformer power supply corresponding with the next stator-sectional, and according to The output of length control with the current stator-sectional corresponding current transformer of the mover in the current stator-sectional, root According to the output of length control with the next stator-sectional corresponding current transformer of the mover in next stator-sectional；

In the case where the movement position of the mover is to run out current stator-sectional completely, controller control with it is described The corresponding current transformer of next stator-sectional keeps power supply and rated output, and controls unsteady flow corresponding with the current stator-sectional Device stops power supply.

3. system according to claim 2, which is characterized in that by following equatioies according to the mover described current fixed The output of length control current transformer corresponding with the current stator-sectional in son segmentation:

Wherein, u_sd1For the motor d shaft voltage of current transformer output corresponding with the current stator-sectional, u_sq1For with it is described current The motor q shaft voltage of the corresponding current transformer output of stator-sectional, R_s1For the stator resistance impedance of the current stator-sectional, ω_s For the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s1For the stator inductance induction reactance of the current stator-sectional, i_sq1For The push current component of the long primary LEM of ultrahigh speed, ψ_fFor the mover magnetic linkage of the long primary LEM of ultrahigh speed, α is Length of the mover in next stator-sectional accounts for the ratio of the mover total length.

4. system according to claim 3, which is characterized in that by following equatioies according to the mover described lower certain The output of length control current transformer corresponding with the next stator-sectional in son segmentation:

Wherein, u_sd2For the motor d shaft voltage of current transformer output corresponding with the next stator-sectional, u_sq2For with it is described next The motor q shaft voltage of the corresponding current transformer output of stator-sectional, R_s2For the stator resistance impedance of next stator-sectional, ω_s For the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s2For the stator inductance induction reactance of next stator-sectional, i_sq2For The push current component of the long primary LEM of ultrahigh speed, ψ_fFor the mover magnetic of the long primary LEM of the ultrahigh speed Chain.

5. system described in any one of -4 according to claim 1, which is characterized in that the detection device is laser range finder.

6. a kind of sectional power supply method for the long primary LEM of ultrahigh speed, which is characterized in that this method comprises:

The movement position of the mover of the long primary LEM of the ultrahigh speed is detected using detection device；

The state and output of current transformer are controlled according to the movement position of the mover using controller, the quantity of current transformer is more A, the stator-sectional for multiple not equal parts to the long primary LEM of the ultrahigh speed is powered.

7. according to the method described in claim 6, it is characterized in that, controlling the shape of current transformer according to the movement position of the mover State and output include:

In the case where the movement position of the mover is that the mover is run in current stator-sectional, the controller control Current transformer power supply corresponding with the current stator-sectional and rated output, remaining current transformer are not powered；

The movement position of the mover be described mover a part be moved into next stator-sectional and a part stay in it is described In the case where current stator-sectional, controller control current transformer power supply corresponding with the next stator-sectional, and according to The output of length control with the current stator-sectional corresponding current transformer of the mover in the current stator-sectional, root According to the output of length control with the next stator-sectional corresponding current transformer of the mover in next stator-sectional；

In the case where the movement position of the mover is to run out current stator-sectional completely, controller control with it is described The corresponding current transformer of next stator-sectional keeps power supply and rated output, and controls unsteady flow corresponding with the current stator-sectional Device stops power supply.

8. the method according to the description of claim 7 is characterized in that by following equatioies according to the mover described current fixed The output of length control current transformer corresponding with the current stator-sectional in son segmentation:

Wherein, u_sd1For the motor d shaft voltage of current transformer output corresponding with the current stator-sectional, u_sq1For with it is described current The motor q shaft voltage of the corresponding current transformer output of stator-sectional, R_s1For the stator resistance impedance of the current stator-sectional, ω_s For the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s1For the stator inductance induction reactance of the current stator-sectional, i_sq1For The push current component of the long primary LEM of ultrahigh speed, ψ_fFor the mover magnetic linkage of the long primary LEM of ultrahigh speed, α is Length of the mover in next stator-sectional accounts for the ratio of the mover total length.

9. according to the method described in claim 8, it is characterized in that, by following equatioies according to the mover described lower certain The output of length control current transformer corresponding with the next stator-sectional in son segmentation:

Wherein, u_sd2For the motor d shaft voltage of current transformer output corresponding with the next stator-sectional, u_sq2For with it is described next The motor q shaft voltage of the corresponding current transformer output of stator-sectional, R_s2For the stator resistance impedance of next stator-sectional, ω_s For the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s2For the stator inductance induction reactance of next stator-sectional, i_sq2For The push current component of the long primary LEM of ultrahigh speed, ψ_fFor the mover magnetic of the long primary LEM of the ultrahigh speed Chain.

Technical field

The present invention relates to motor power supply technique field more particularly to a kind of segmentations for the long primary LEM of ultrahigh speed Power supply system and method.

Background technique

Magnetic suspension and ELECTROMAGNETIC LAUNCH TECHNOLOGY, which refer to disengage using magnetic levitation technology and track, eliminates frictional resistance and vibration It is dynamic, expendables and the high pollution resources such as powerful acceleration capacity substitution chemical fuel are provided using electromagnetic propulsion technology.Magnetic suspension Rely primarily on electric power and magnetic force as driving force with electromagnetic propulsion technology, have it is reusable, environmentally protective, flexibly it is adjustable, The advantages that inexpensive is the Typical Representative of third time energy revolution, meets the trend of technology development and era development.In high speed magnetic The linear motor in suspension and Electromagnetic Launching field has been all made of the structure type of the short mover linear motor of long primary, has mover Light structure is light-weight, removes the advantages that trouble of power supply in motion process from, but the problem is that primary supplies are opposite Difficulty, if mover only accounts for the wherein effective space of fraction, remainder and is converted into reactance capacity when whole power supply.In this way Both uneconomical or unnecessary.The method for solving the problems, such as long primary supplies is segmented to long primary using sectional power supply, only First level segment near secondary is powered, other just level segment no powers are segmented primary switching power supply paragraph by paragraph with secondary movement.

Many countries all attempt to use sectional power supply technology to power for long primary LEM in some applications at present, In civil field such as Shanghai magnetic suspension system using primary segmentation, every section of primary length is about 4 times of time level length, two sides Primary dislocation is layered on guide rail, carries out sectional power supply using two-step method or three-step approach, switching switch uses mechanical switch.However, There is low-response in switching power supply process in such mode, it is long primary straight not to be suitable for ultrahigh speed for the more disadvantage of thrust loss Line motor is to electromagnetic push and the higher application of response speed.

Summary of the invention

It is an object of the invention to overcome the shortage of prior art, provide a kind of for the long primary LEM of ultrahigh speed Sectional power supply system and method are able to solve above-mentioned the problems of the prior art.

A kind of technical solution of the invention: sectional power supply system for the long primary LEM of ultrahigh speed, wherein The system includes:

Multiple current transformers, the stator-sectional for multiple not equal parts to the long primary LEM of the ultrahigh speed supply Electricity；

Detection device, the movement position of the mover for detecting the long primary LEM of the ultrahigh speed；

Controller, for controlling the state and output of current transformer according to the movement position of the mover.

Preferably, the controller controls the state of current transformer according to the movement position of the mover and output includes:

In the case where the movement position of the mover is that the mover is run in current stator-sectional, the controller Simultaneously rated output, remaining current transformer are not powered for control current transformer power supply corresponding with the current stator-sectional；

It is that described mover a part is moved into next stator-sectional and a part stays in the movement position of the mover In the case where the current stator-sectional, controller control current transformer power supply corresponding with the next stator-sectional, and According to the defeated of length control with the current stator-sectional corresponding current transformer of the mover in the current stator-sectional Out, length control current transformer corresponding with the next stator-sectional according to the mover in next stator-sectional Output；

In the case where the movement position of the mover is to run out current stator-sectional completely, controller control with The corresponding current transformer of next stator-sectional keeps power supply and rated output, and controls corresponding with the current stator-sectional Current transformer stops power supply.

Preferably, it is controlled by following equatioies according to length of the mover in the current stator-sectional and is worked as with described Front stator is segmented the output of corresponding current transformer:

Wherein, u_sd1For the motor d shaft voltage of current transformer output corresponding with the current stator-sectional, u_sq1For with it is described The motor q shaft voltage of the currently corresponding current transformer output of stator-sectional, R_s1For the stator resistance impedance of the current stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s1For the stator inductance induction reactance of the current stator-sectional, i_sq1For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the mover magnetic of the long primary LEM of ultrahigh speed Chain, α are the ratio that length of the mover in next stator-sectional accounts for the mover total length.

Preferably, by following equatioies according to the mover in next stator-sectional length control with it is described under The output of the corresponding current transformer of one stator-sectional:

Wherein, u_sd2For the motor d shaft voltage of current transformer output corresponding with the next stator-sectional, u_sq2For with it is described The motor q shaft voltage of the corresponding current transformer output of next stator-sectional, R_s2For the stator resistance impedance of next stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s2For the stator inductance induction reactance of next stator-sectional, i_sq2For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the dynamic of the long primary LEM of the ultrahigh speed Sub- magnetic linkage.

Preferably, the detection device is laser range finder.

The present invention also provides a kind of sectional power supply methods for the long primary LEM of ultrahigh speed, wherein this method Include:

The movement position of the mover of the long primary LEM of the ultrahigh speed is detected using detection device；

The state and output of current transformer are controlled according to the movement position of the mover using controller, the quantity of current transformer is Multiple, the stator-sectional for multiple not equal parts to the long primary LEM of the ultrahigh speed is powered.

Preferably, the state of current transformer is controlled according to the movement position of the mover and output includes:

In the case where the movement position of the mover is that the mover is run in current stator-sectional, the controller Simultaneously rated output, remaining current transformer are not powered for control current transformer power supply corresponding with the current stator-sectional；

It is that described mover a part is moved into next stator-sectional and a part stays in the movement position of the mover In the case where the current stator-sectional, controller control current transformer power supply corresponding with the next stator-sectional, and According to the defeated of length control with the current stator-sectional corresponding current transformer of the mover in the current stator-sectional Out, length control current transformer corresponding with the next stator-sectional according to the mover in next stator-sectional Output；

In the case where the movement position of the mover is to run out current stator-sectional completely, controller control with The corresponding current transformer of next stator-sectional keeps power supply and rated output, and controls corresponding with the current stator-sectional Current transformer stops power supply.

Preferably, it is controlled by following equatioies according to length of the mover in the current stator-sectional and is worked as with described Front stator is segmented the output of corresponding current transformer:

Wherein, u_sd1For the motor d shaft voltage of current transformer output corresponding with the current stator-sectional, u_sq1For with it is described The motor q shaft voltage of the currently corresponding current transformer output of stator-sectional, R_s1For the stator resistance impedance of the current stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s1For the stator inductance induction reactance of the current stator-sectional, i_sq1For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the mover magnetic of the long primary LEM of ultrahigh speed Chain, α are the ratio that length of the mover in next stator-sectional accounts for the mover total length.

Preferably, by following equatioies according to the mover in next stator-sectional length control with it is described under The output of the corresponding current transformer of one stator-sectional:

Wherein, u_sd2For the motor d shaft voltage of current transformer output corresponding with the next stator-sectional, u_sq2For with it is described The motor q shaft voltage of the corresponding current transformer output of next stator-sectional, R_s2For the stator resistance impedance of next stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s2For the stator inductance induction reactance of next stator-sectional, i_sq2For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the dynamic of the long primary LEM of the ultrahigh speed Sub- magnetic linkage.

Through the above technical solutions, can use the movement position that detection device detects the mover of long primary LEM, The state and output of current transformer can be controlled according to the movement position of the mover using controller.As a result, by mover position It sets and is positioned, can accurately control the opportunity that each section of stator (that is, each stator-sectional) opens shutdown (for example, power on/off) And the output size of current transformer, power supply is switched paragraph by paragraph to the stator of the long primary LEM of ultrahigh speed to realize.

Detailed description of the invention

Included attached drawing is used to provide to be further understood from the embodiment of the present invention, and which constitute one of specification Point, for illustrating the embodiment of the present invention, and come together to illustrate the principle of the present invention with verbal description.It should be evident that below Attached drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation Property labour under the premise of, be also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of frame of the sectional power supply system for the long primary LEM of ultrahigh speed provided in an embodiment of the present invention Figure；

Fig. 2 is a kind of schematic diagram of the mover provided in an embodiment of the present invention across two sections of stator-sectionals；

Fig. 3 is a kind of showing for sectional power supply system for the long primary LEM of ultrahigh speed provided in an embodiment of the present invention It is intended to；

Fig. 4 is a kind of stream of the sectional power supply method for the long primary LEM of ultrahigh speed provided in an embodiment of the present invention Cheng Tu；

Fig. 5 is a kind of motor curve of traction characteristics schematic diagram provided in an embodiment of the present invention.

Specific embodiment

Specific embodiments of the present invention are described in detail below in conjunction with attached drawing.In the following description, for solution Purpose and not restrictive is released, elaborates detail, to help to be apparent from the present invention.However, to those skilled in the art It is readily apparent that the present invention can also be practiced in the other embodiments departing from these details for member.

It should be noted that only showing in the accompanying drawings in order to avoid having obscured the present invention because of unnecessary details Gone out with closely related device structure and/or processing step according to the solution of the present invention, and be omitted with relationship of the present invention not Big other details.

Fig. 1 is a kind of frame of the sectional power supply system for the long primary LEM of ultrahigh speed provided in an embodiment of the present invention Figure.

As shown in Figure 1, the embodiment of the invention provides a kind of sectional power supply systems for the long primary LEM of ultrahigh speed System, wherein the system may include:

Multiple current transformers 10, the stator-sectional for multiple not equal parts to the long primary LEM of the ultrahigh speed carry out Power supply；

In Fig. 1, for simplicity purposes, a current transformer 10 is illustrated only, but not indicate that the system only includes one A current transformer 10.

Detection device 20, the movement position of the mover for detecting the long primary LEM of the ultrahigh speed；

Controller 30, for controlling the state and output of current transformer 10 according to the movement position of the mover.

Through the above technical solutions, can use the movement position that detection device detects the mover of long primary LEM, The state and output of current transformer can be controlled according to the movement position of the mover using controller.As a result, by mover position It sets and is positioned, can accurately control the opportunity that each section of stator (that is, each stator-sectional) opens shutdown (for example, power on/off) And the output size of current transformer, so that realization switches power supply to the stator of the long primary LEM of ultrahigh speed paragraph by paragraph, (mover exists Different movement positions can correspond to different current transformer output, switch power supply paragraph by paragraph to stator to be better achieved).

According to an embodiment of the present invention, the controller 30 controls the shape of current transformer according to the movement position of the mover State and output may include:

In the case where the movement position of the mover is that the mover is run in current stator-sectional, the controller Simultaneously rated output, remaining current transformer are not powered for 30 controls current transformer power supply corresponding with the current stator-sectional；

It is, being connected to one for front stator segmentation is deserved when the mover is run on completely in current stator-sectional A current transformer power supply, and current transformer rated output power supply is controlled, while remaining current transformer is not powered (that is, disconnecting shape State).

It is that described mover a part is moved into next stator-sectional and a part stays in the movement position of the mover In the case where the current stator-sectional, the controller 30 control current transformer power supply corresponding with the next stator-sectional, And the length control current transformer corresponding with the current stator-sectional according to the mover in the current stator-sectional Output, according to length control with the next stator-sectional corresponding current transformer of the mover in next stator-sectional Output；

For example, in the case where mover is run across two sections of stator-sectionals simultaneously, for next stator-sectional (that is, preceding Square stator-sectional) control machine winding induced electromotive force with stator covering mover area constantly increase from minimum value (for example, 0) maximum value is risen to, i.e., the output for correspondingly controlling corresponding current transformer is changed from small to big；For current stator-sectional (that is, rear Stator-sectional) control machine winding induced electromotive force constantly reduced from maximum value and is minimized with the area of stator covering mover It is worth (for example, 0), i.e., correspondingly controls the output of corresponding current transformer from large to small.

In the case where the movement position of the mover is to run out current stator-sectional completely, the controller 30 is controlled Current transformer corresponding with the next stator-sectional keeps power supply and rated output, and controls corresponding with the current stator-sectional Current transformer stop power supply.

It is, when the mover is completely into next stator-sectional and runs in next stator-sectional, for Next stator-sectional is connected to a current transformer power supply, and controls current transformer rated output power supply, while making remaining unsteady flow Device does not power (that is, off-state).

Generally speaking, when mover is completely in a certain section of stator-sectional, it by vector and can decompose, realize electricity (according to the basic principle of linear motor rotor field orientation, the end voltage of motor can divide the push current of machine with exciting current Solution is at excitation component (parallel with mover magnetic field) and thrust component (parallel with mover magnetic field)) decoupling control.For example, can adopt With the mode similar with conventional motor control strategy, in order not to obscure the present invention, details are not described herein.

According to an embodiment of the present invention, can by following equatioies according to the mover in the current stator-sectional Length control current transformer corresponding with the current stator-sectional output:

Wherein, u_sd1For the motor d shaft voltage of current transformer output corresponding with the current stator-sectional, u_sq1For with it is described The motor q shaft voltage of the currently corresponding current transformer output of stator-sectional, R_s1For the stator resistance impedance of the current stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s1For the stator inductance induction reactance of the current stator-sectional, i_sq1For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the mover magnetic of the long primary LEM of ultrahigh speed Chain, α are the ratio that length of the mover in next stator-sectional accounts for the mover total length.

Wherein, mover is in two sections of stator-sectionals (stator-sectional No.1 (corresponding current stator-sectional) and stator-sectional No.2 (corresponding next stator-sectional)) in distribution of lengths as shown in Fig. 2, Fig. 2 be a kind of mover provided in an embodiment of the present invention across The schematic diagram of two sections of stator-sectionals.

For example, in the case where mover is run across two sections of stator-sectionals simultaneously, with a mover constantly downward stator Partition running, the length of the stator in next stator-sectional are continuously increased (that is, the length of the mover in next stator-sectional The ratio that degree accounts for stator total length increases).Accordingly, for (that is, front stator-sectional) for next stator-sectional, motor is controlled Winding induced electromotive force constantly increases with the area of stator covering mover and will rise to maximum value from minimum value (for example, 0), i.e., Correspondingly control the output of corresponding current transformer from large to small.

As a result, by increasing shown in above-mentioned equation on the basis of the output of the dq axis PI controller of traditional mover field orientation Electric voltage feed forward compensation rate, i.e., for q shaft current PI controller output on the basis of increase a synchronizing frequency, magnetic linkage and Product amount of the mover between the ratio for accounting for total length in current stator-sectional, can control the disturbance in handoff procedure System improves system response, reduces force oscillation and loss.Also, since the parameters of electric machine such as mover magnetic linkage are in design of electrical motor It has just been cured, compensation rate only depends on the accuracy to test the speed, if testing the speed accurately, PI controller only needs to provide electricity Steady-state error compensation is flowed, the disturbance for undertaking counter electromotive force variation is not needed, the parameter adjustment of such PI controller is relatively simple Change.

It is similar with the compensation control of current stator-sectional below with reference to the compensation control in next stator-sectional, herein not It repeats again.

According to an embodiment of the present invention, the length by following equatioies according to the mover in next stator-sectional The output of degree control current transformer corresponding with the next stator-sectional:

Wherein, u_sd2For the motor d shaft voltage of current transformer output corresponding with the next stator-sectional, u_sq2For with it is described The motor q shaft voltage of the corresponding current transformer output of next stator-sectional, R_s2For the stator resistance impedance of next stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s2For the stator inductance induction reactance of next stator-sectional, i_sq2For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the dynamic of the long primary LEM of the ultrahigh speed Sub- magnetic linkage.

For example, in the case where mover is run across two sections of stator-sectionals simultaneously, with a mover constantly downward stator Partition running, the length of the stator in current stator-sectional constantly reduce (that is, the length of the mover in current stator-sectional The ratio that degree accounts for stator total length reduces).Accordingly, for current stator-sectional (that is, rear stator-sectional), machine winding is controlled Induced electromotive force is minimized value (for example, 0) as the area of stator winding covering mover is constantly reduced from maximum value, i.e., accordingly The output that ground controls corresponding current transformer is changed from small to big.

According to an embodiment of the present invention, the detection device 20 can be laser range finder.

For example, laser range finder has the advantages that high sample frequency, high-precision.It can benefit by the laser range finder With the position of flight telemetry precise measurement mover.

According to an embodiment of the present invention, the quantity of the current transformer 10 can be with the stator of the long primary LEM The quantity of segmentation is identical or less than the quantity of the stator-sectional of the long primary LEM.

In the quantity situation identical with the quantity of stator-sectional of the long primary LEM of the current transformer 10, One stator-sectional can be corresponding with a current transformer for its power supply.

In the case where quantity of the quantity of the current transformer 10 less than the stator-sectional of the long primary LEM, one A current transformer can be used for powering in the different stator-sectionals that different moments are motor.

For example, the different stator-sectionals that the same current transformer is motor can be controlled by switching switch to power.

Fig. 3 is a kind of showing for sectional power supply system for the long primary LEM of ultrahigh speed provided in an embodiment of the present invention It is intended to.

The sectional power supply system of the present invention for the long primary LEM of ultrahigh speed is retouched below with reference to Fig. 3 It states.

In fig. 3 it is shown that realizing two current transformers in the difference that different moments are motor by multiple switching switches Stator-sectional power supply.

Specifically, according to Fig. 3: when mover is completely in stator-sectional No.1, switching switch No.1 for current transformer # 1 connect with stator-sectional No.1, stator-sectional No.1 work；When mover enters stator-sectional No.2, switching switch No.2 will Current transformer #2 is connect with stator-sectional No.2, and stator-sectional No.1, No.2 are worked at the same time, and through the foregoing embodiment described in The output that formula respectively corresponds current transformer is controlled；When mover is completely into stator-sectional No.2, switching switch No.1 will Current transformer #1 and stator-sectional No.1 is disconnected, and stator-sectional No.2 works independently.

It is, taking full advantage of the characteristic of constant voltage and frequency ratio on the basis of parallel sectional power supply.

It will be appreciated by those skilled in the art that the above-mentioned description as described in Fig. 3 is only exemplary, it is not intended to limit this Invention.

Fig. 4 is a kind of stream of the sectional power supply method for the long primary LEM of ultrahigh speed provided in an embodiment of the present invention Cheng Tu.

As shown in figure 4, the embodiment of the invention provides a kind of sectional power supply sides for the long primary LEM of ultrahigh speed Method, wherein this method may include:

S200 detects the movement position of the mover of the long primary LEM of the ultrahigh speed using detection device；

S202 controls the state and output of current transformer using controller according to the movement position of the mover, current transformer Quantity be it is multiple, the stator-sectional for multiple not equal parts to the long primary LEM of the ultrahigh speed is powered.

Through the above technical solutions, can use the movement position that detection device detects the mover of long primary LEM, The state and output of current transformer can be controlled according to the movement position of the mover using controller.As a result, by mover position It sets and is positioned, can accurately control the opportunity that each section of stator (that is, each stator-sectional) opens shutdown (for example, power on/off) And the output size of current transformer, power supply is switched paragraph by paragraph to the stator of the long primary LEM of ultrahigh speed to realize.

According to an embodiment of the present invention, the state of current transformer and defeated is controlled according to the movement position of the mover in S202 May include: out

In the case where the movement position of the mover is that the mover is run in current stator-sectional, the controller Simultaneously rated output, remaining current transformer are not powered for control current transformer power supply corresponding with the current stator-sectional；

It is that described mover a part is moved into next stator-sectional and a part stays in the movement position of the mover In the case where the current stator-sectional, controller control current transformer power supply corresponding with the next stator-sectional, and According to the defeated of length control with the current stator-sectional corresponding current transformer of the mover in the current stator-sectional Out, length control current transformer corresponding with the next stator-sectional according to the mover in next stator-sectional Output；

In the case where the movement position of the mover is to run out current stator-sectional completely, controller control with The corresponding current transformer of next stator-sectional keeps power supply and rated output, and controls corresponding with the current stator-sectional Current transformer stops power supply.

According to an embodiment of the present invention, can by following equatioies according to the mover in the current stator-sectional Length control current transformer corresponding with the current stator-sectional output:

Wherein, u_sd1For the motor d shaft voltage of current transformer output corresponding with the current stator-sectional, u_sq1For with it is described The motor q shaft voltage of the currently corresponding current transformer output of stator-sectional, R_s1For the stator resistance impedance of the current stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s1For the stator inductance induction reactance of the current stator-sectional, i_sq1For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the mover magnetic of the long primary LEM of ultrahigh speed Chain, α are the ratio that length of the mover in the current stator-sectional accounts for the mover total length.

According to an embodiment of the present invention, can by following equatioies according to the mover in next stator-sectional Length control current transformer corresponding with the next stator-sectional output:

Wherein, u_sd2For the motor d shaft voltage of current transformer output corresponding with the next stator-sectional, u_sq2For with it is described The motor q shaft voltage of the corresponding current transformer output of next stator-sectional, R_s2For the stator resistance impedance of next stator-sectional, ω_sFor the synchronizing frequency of the long primary LEM of the ultrahigh speed, L_s2For the stator inductance induction reactance of next stator-sectional, i_sq2For the push current component of the long primary LEM of the ultrahigh speed, ψ_fFor the dynamic of the long primary LEM of the ultrahigh speed Sub- magnetic linkage.

The method of above-mentioned Fig. 4 description is corresponding with the system that earlier figures 1 describe, and specific example explanation may refer to aforementioned pass In the explanation of the system of Fig. 1 description, details are not described herein.

In addition, equal part is not segmented the stator about the long primary LEM of ultrahigh speed, those skilled in the art can basis Actual conditions determine number of fragments.

For example, according to motor control principle, output voltage, electric current can be indicated when motor works normally are as follows:

u_xn(x=a, b, c ...)=N (R_s+jωL_s)i_xn(x=a, b, c ...)+E_xn(x=a, b, c ...),

Wherein:

R_sFor the stator resistance impedance of motor, ω is the synchronizing frequency of motor, L_sFor the stator inductance induction reactance of motor,

u_xn(x=a, b, c ...) is current transformer output voltage (that is, motor input voltage), x a, b, c three-phase；

i_xn(x=a, b, c ...) is output current of converter (that is, motor input current), x a, b, c three-phase；

E_xn(x=a, b, c ...) is the counter electromotive force of motor, and x a, b, c three-phase are directly proportional to speed；

N is stator serial number.

From the formula it is found that stator serial number is more, constant pressure is bigger than coefficient, then linear motor is assigned in identical voltage The speed arrived is lower, as shown in Figure 5.Wherein, Fig. 5 is a kind of motor curve of traction characteristics signal provided in an embodiment of the present invention Figure, k1, k2, k3 indicate constant pressure than coefficient, and u indicates that voltage, v indicate speed.

If if serial number is few, motor speed is lower in startup stage, then current transformer is in low-voltage output, It can not work in optimum state.So startup stage serial number can be reversely pushed out by above formula, be shown below.

For example, the maximum output line voltage of current transformer is 2100V, and maximum current 3400A, resistance is 5m Ω, electricity Sense is 2uH, highest frequency 200Hz, then maximum serial number N is 98.The maximum 49 on the entire track of long primary LEM It is a successively to successively decrease.

It will be appreciated by those skilled in the art that examples detailed above is only exemplary, it is not intended to limit the present invention.

As above it describes for a kind of embodiment and/or the feature that shows can be in a manner of same or similar at one or more It is used in a number of other embodiments, and/or combines or substitute the feature in other embodiments with the feature in other embodiments It uses.

It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously It is not excluded for the presence or additional of one or more other features, one integral piece, step, component or combinations thereof.

The system and method more than present invention can be by hardware realization, can also be by combination of hardware software realization.The present invention It is related to such computer-readable program, when the program is performed by logical block, the logical block can be made to realize above The device or component parts, or the logical block is made to realize various method or steps described above.The invention further relates to For storing the storage medium of procedure above, such as hard disk, disk, CD, DVD, flash memory.

The many features and advantage of these embodiments are clear according to the detailed description, therefore appended claims are intended to Cover all these feature and advantage of these embodiments fallen into its true spirit and range.Further, since this field Technical staff is readily apparent that many modifications and changes, therefore is not meant to for the embodiment of the present invention to be limited to illustrated and description essence Really structurally and operationally, but all suitable modifications and the equivalent fallen within the scope of its can be covered.

Unspecified part of the present invention is known to the skilled person technology.