CN101791984A - Power system of urban railway transit train - Google Patents
Power system of urban railway transit train Download PDFInfo
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- CN101791984A CN101791984A CN201010127259A CN201010127259A CN101791984A CN 101791984 A CN101791984 A CN 101791984A CN 201010127259 A CN201010127259 A CN 201010127259A CN 201010127259 A CN201010127259 A CN 201010127259A CN 101791984 A CN101791984 A CN 101791984A
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Abstract
The invention provides a power system of an urban railway transit train, which is arranged in a motor car of the urban railway transit train. The power system comprises a plurality of permanent magnet synchronous traction motors and a plurality of control subsystems. All of the permanent magnet synchronous traction motors are arranged on a bogie of the motor car and used for supplying power for the motor car, and the amount of the permanent magnet synchronous motors is the same as that of the control subsystems. One control subsystem only supplies power for one permanent magnet synchronous traction motor, and one permanent magnet synchronous traction motor only receives the power supply from one control subsystem. By adopting the invention, the permanent magnet synchronous traction motors can be applied to the power system of the urban railway transit train.
Description
Technical field
The present invention relates to urban rail transit technology, relate in particular to power system of urban railway transit train.
Background technology
Two groups of wheels were right before and after a vehicle of urban railway transit train generally had, and every group of wheel is to generally all having two axles, and every group of wheel is to forming a bogie truck.Urban railway transit train is installed the electrical motor that promising train provides power, and electrical motor also can abbreviate motor as.Motor generally is installed on the bogie truck, and two motors generally all are installed on each bogie truck, specifically, on each axle a motor is installed all.As shown in Figure 1, a vehicle has former and later two bogie trucks 102, and every group of wheel all is equipped with a motor 101 to all having two axles 103 on each axle.
At present, the motor that is installed on the bogie truck generally all is an asynchronous dynamo.Development along with permanent-magnet synchronous traction electric machine technology, those skilled in the art also begin to consider the permanent-magnet synchronous traction electric machine is applied in the power system of urban railway transit train, but up to the present, also there is not concrete technical scheme openly how the permanent-magnet synchronous traction electric machine to be applied in the power system of urban railway transit train.
Summary of the invention
The invention provides power system of urban railway transit train, the permanent-magnet synchronous traction electric machine is applied to problem in the power system of urban railway transit train in order to solve.
The invention provides a kind of power system of urban railway transit train, be arranged in the motor-car of urban railway transit train, described system comprises: a plurality of permanent-magnet synchronous traction electric machines and a plurality of control subsystem; All permanent-magnet synchronous traction electric machines all are arranged on the bogie truck of described motor-car, for described motor-car provides power; The quantity of permagnetic synchronous motor is identical with the quantity of control subsystem; A control subsystem only is a permanent-magnet synchronous traction electric machine power supply, and a permanent-magnet synchronous traction electric machine is only accepted the power supply of a control subsystem.
In power system of urban railway transit train of the present invention, a control subsystem only is a permanent-magnet synchronous traction electric machine power supply, and a permanent-magnet synchronous traction electric machine is only accepted the power supply of a control subsystem.Because the rotating speed of permanent-magnet synchronous traction electric machine is directly proportional with the electric voltage frequency of acceptance, so, if by a control subsystem is a plurality of permanent-magnet synchronous traction electric machine power supplies, so can be owing to the stator frequency unanimity of these permanent-magnet synchronous traction electric machines, and cause the rotating speed of these permanent-magnet synchronous traction electric machines also consistent.But, in actual applications, wheel between generally all can exist wheel footpath poor, if the rotating speed unanimity of permanent-magnet synchronous traction electric machine, in train travelling process, taking turns right linear velocity just may be inconsistent so, this is unallowed in actual applications.So, if each permanent-magnet synchronous traction electric machine is its power supply by an independent control subsystem all, can realize the difference of permanent-magnet synchronous traction electric machine rotating speed so, thereby overcome since wheel between the inconsistent problem of the poor linear velocity that causes in wheel footpath, make that the right linear velocity of wheel is in full accord.Therefore, the present invention can realize the permanent-magnet synchronous traction electric machine is applied in the power system of urban railway transit train.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the scheme drawing that an existing vehicle is installed motor;
Fig. 2 is the logical organization scheme drawing of a kind of power system of urban railway transit train of the present invention;
Fig. 3 is the scheme drawing of the unloaded induced voltage of permanent-magnet synchronous traction electric machine of the present invention with the rotation speed change of permanent-magnet synchronous traction electric machine;
The unloaded induction electricity line ball voltage effective value that Fig. 4 produces under maximum speed of revolution for permanent-magnet synchronous traction electric machine of the present invention is respectively under the situation of 930V and 1400V, power factor and efficient is with the scheme drawing of the rotation speed change of permanent-magnet synchronous traction electric machine;
Fig. 5 A is a kind of three-phase symmetrical short-circuit view of permanent-magnet synchronous traction electric machine of the present invention;
Fig. 5 B is the another kind of three-phase symmetrical short-circuit view of permanent-magnet synchronous traction electric machine of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Need to prove that at first power system of urban railway transit train provided by the invention can be arranged in the motor-car of urban railway transit train.The motor-car of urban railway transit train is meant the vehicle powered that has in the urban railway transit train.
Urban railway transit train can be powered by contact system, also can be powered by track.The required electric power of the a/c system of train and power system can be from contact system or track.Train can be powered to a/c system and power system behind contact system or track acquisition electric power.The equipment that relates to power supply in the train can constitute a train power supply network.
Below a kind of power system of urban railway transit train of the present invention is described.
A kind of power system of urban railway transit train of the present invention comprises: a plurality of permanent-magnet synchronous traction electric machines and a plurality of control subsystem; All permanent-magnet synchronous traction electric machines all are arranged on the bogie truck of described motor-car, for described motor-car provides power; The quantity of permagnetic synchronous motor is identical with the quantity of control subsystem; A control subsystem only is a permanent-magnet synchronous traction electric machine power supply, and a permanent-magnet synchronous traction electric machine is only accepted the power supply of a control subsystem.Control subsystem can provide voltage for the permanent-magnet synchronous traction electric machine, and the input voltage of control subsystem can be from the train power supply network.Behind the voltage that permanent-magnet synchronous traction electric machine acquisition control subsystem provides, kinetic energy can be converted to kinetic energy, for train provides power.
When specific implementation, a control subsystem can comprise a controller and an inverter, inverter provides voltage for cooresponding permanent-magnet synchronous traction electric machine, the voltage of controller control inverter output, for example output voltage amplitude of control inverter and frequency.The voltage that the voltage transitions that inverter can provide the train power supply network can be accepted for the permanent-magnet synchronous traction electric machine.Generally speaking, the voltage that the supply network of urban railway transit train provides is vdc, the voltage that the permanent-magnet synchronous traction electric machine can be accepted is alternating-current voltage/AC voltage, in this case, inverter radical function is exactly the alternating-current voltage/AC voltage that the vdc inversion that provides of the supply network with urban railway transit train can be accepted for the permanent-magnet synchronous traction electric machine.
If controller and inverter are introduced in the power system of urban railway transit train, a kind of logical organization of power system of urban railway transit train can be as shown in Figure 2 so.Power system of urban railway transit train shown in Figure 2 can be applied in the motor-car with four axles.As shown in Figure 2, this power system of urban railway transit train comprises 203,4 inverters 202 of 4 controllers and 4 permanent-magnet synchronous traction electric machines 201.An inverter 202 can only be 201 power supplies of a permanent-magnet synchronous traction electric machine, and a permanent-magnet synchronous traction electric machine 201 can only be accepted the power supply of an inverter 202.A controller 203 can only be controlled the output voltage of an inverter 202, and the output voltage of an inverter 202 can only be by 203 controls of a controller.
In actual applications, each controller 203 can be adjusted the output voltage amplitude and the frequency of each self-corresponding inverter 202, like this, the output voltage amplitude of inverter 202 and frequency are exactly adjustable, because the frequency of the voltage that permanent-magnet synchronous traction electric machine 201 is accepted is directly proportional with the rotating speed of permanent-magnet synchronous traction electric machine 201, so the rotating speed of permanent-magnet synchronous traction electric machine 201 also is adjustable.Train is when operation, each takes turns right linear velocity must guarantee unanimity, and owing to reasons such as technologies, the wheel that has between can exist the wheel footpath poor, if the rotating speed between the permanent-magnet synchronous traction electric machine 201 is difference to some extent, so just can overcome since wheel between the inconsistent problem of the poor linear velocity that causes in wheel footpath.Therefore, if each permanent-magnet synchronous traction electric machine 201 is its power supply by an independent inverter 202 all, the frequency of the voltage that obtains of permanent-magnet synchronous traction electric machine 201 difference to some extent so, like this, rotating speed between the permanent-magnet synchronous traction electric machine 201 is difference to some extent also, thus overcome since wheel between the inconsistent problem of the wheel poor linear velocity that causes in footpath.
In actual applications, the excitation of permanent-magnet synchronous traction electric machine can't be turn-offed, in this case, even the outside does not power, the permanent magnet of permanent-magnet synchronous traction electric machine also can make stator coil produce interlinkage flux, as long as its rotation will produce induced voltage on the terminal, this voltage is called unloaded induced voltage.The size of unloaded induced voltage depends on the magnetic field of permanent magnet generation and the rotating speed of permanent-magnet synchronous traction electric machine, and this is one of key distinction of permanent-magnet synchronous traction electric machine and asynchronous dynamo.The permanent-magnet synchronous traction electric machine is applied in the power system of urban railway transit train, its unloaded induced voltage may bring following problem:
(1) when inverter breaks down,, then can enlarge fault effects if the permanent-magnet synchronous traction electric machine is powered to the trouble point;
(2) if the peak value of unloaded induced voltage surpasses the withstand voltage of inverter element, then can damage element;
(3) the permanent-magnet synchronous traction electric machine drops into control again and can have any problem when the train high-speed cruising, concrete, when the train high-speed cruising, if control subsystem et out of order, control subsystem can't be controlled the permanent-magnet synchronous traction electric machine so, after the fault of control subsystem was disengaged, control subsystem can be controlled the permanent-magnet synchronous traction electric machine again, and the process of setting up control again is called to drop into again to be controlled;
(4) when permanent-magnet synchronous traction electric machine generation turn-to-turn short circuit, because the existence of unloaded induced voltage may enlarge the influence of fault.
Even proper, then can overcome above-mentioned several problem if the voltage that the unloaded induced voltage that the permanent-magnet synchronous traction electric machine produces obtains is chosen behind diode rectification under maximum speed of revolution.For ease of describing, even the voltage that obtains behind diode rectification of the unloaded induced voltage that the permanent-magnet synchronous traction electric machine is produced under maximum speed of revolution is called maximum unloaded induced voltage here.
In actual applications, there is multiple mode can determine maximum unloaded induced voltage.
For example, for eliminating of the influence of unloaded induced voltage, can require maximum unloaded induced voltage to be no more than the minimum value of the input voltage of cooresponding inverter to the train dynamics system performance.In actual applications, the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces under maximum speed of revolution is big more, maximum unloaded induced voltage is just big more, the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces under maximum speed of revolution is more little, and maximum unloaded induced voltage is just more little.Minimum value with the input voltage of cooresponding inverter is that DC1300V is an example, and the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces under maximum speed of revolution can be 930V, and wherein, DC represents direct current.In this case, the stator core length of permanent-magnet synchronous traction electric machine can be 160mm.
Again for example, from the angle of train operating safety, when the permanent-magnet synchronous traction electric machine is not controlled fully, can require maximum unloaded induced voltage to be no more than the maxim of the input voltage of cooresponding inverter.Equally, in actual applications, the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces under maximum speed of revolution is big more, maximum unloaded induced voltage is just big more, the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces under maximum speed of revolution is more little, and maximum unloaded induced voltage is just more little.Maxim with the input voltage of cooresponding inverter is that DC1900V is an example, considers power device and power circuit are not caused damage that the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces under maximum speed of revolution can be 1400V.In this case, the stator core length of permanent-magnet synchronous traction electric machine can be 140mm.
Fig. 3 is for to be respectively under the situation of 930V and 1400V at the unloaded induction electricity line ball voltage effective value that produces under the maximum speed of revolution at the permanent-magnet synchronous traction electric machine, and the unloaded induced voltage of permanent-magnet synchronous traction electric machine is with the scheme drawing of the rotation speed change of permanent-magnet synchronous traction electric machine.As shown in Figure 3, the unloaded induced voltage of permanent-magnet synchronous traction electric machine is directly proportional with the rotating speed of permanent-magnet synchronous traction electric machine, even when the unloaded induction electricity line ball voltage effective value that produces under maximum speed of revolution when the permanent-magnet synchronous traction electric machine was 1400V, the unloaded induced voltage of permanent-magnet synchronous traction electric machine was very fast with the rotation speed change of permanent-magnet synchronous traction electric machine.
Fig. 4 is for to be respectively under the situation of 930V and 1400V at the unloaded induction electricity line ball voltage effective value that produces under the maximum speed of revolution at the permanent-magnet synchronous traction electric machine, and power factor (Power Factor) and efficient (Efficiency) are with the scheme drawing of the rotation speed change of permanent-magnet synchronous traction electric machine.In Fig. 4, high unloaded induced voltage scheme is meant that the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces is 1400V under maximum speed of revolution,, low unloaded induced voltage scheme is meant that the unloaded induction electricity line ball voltage effective value that the permanent-magnet synchronous traction electric machine produces is 930V under maximum speed of revolution.As shown in Figure 4, the efficient of the high unloaded induced voltage scheme of the efficiency ratio of low unloaded induced voltage scheme when permanent-magnet synchronous traction electric machine slow speed of revolution when permanent-magnet synchronous traction electric machine slow speed of revolution is low, and the efficient of two schemes when the high rotating speed of permanent-magnet synchronous traction electric machine is more or less the same.In whole rotation speed change scope, the power factor of low unloaded induced voltage scheme will be lower than the power factor of high unloaded induced voltage scheme.
In addition, because the internal resistance of permanent-magnet synchronous traction electric machine increases, the overload magnification of low unloaded induced voltage scheme also is lower than the overload magnification of high unloaded induced voltage scheme, if realize same tractive characteristic, uses the volume of the permanent-magnet synchronous traction electric machine that hangs down unloaded induced voltage scheme bigger so.Overload magnification is to weigh the exert oneself important indicator of ability of motor.The reduction of overload magnification and the increase of motor volume can show that the power density of low unloaded induced voltage scheme will be lower than the power density of high unloaded induced voltage scheme.
Can find from above contrast, the permanent-magnet synchronous traction electric machine that uses high unloaded induced voltage scheme is with respect to the permanent-magnet synchronous traction electric machine that uses low unloaded induced voltage scheme, have that volume is little, the performance advantages of higher, use the permanent-magnet synchronous traction electric machine of high unloaded induced voltage scheme in whole rotation speed change scope, all to keep higher efficient and power factor.
In addition, the problem that high unloaded induced voltage brings is exactly the permanent-magnet synchronous traction electric machine drops into control again when the train high-speed cruising a difficulty, but consider the short characteristics of distance between city rail traffic station, if control subsystem et out of order when the train high-speed cruising, cause the permanent-magnet synchronous traction electric machine uncontrollable, so can be again with permanent-magnet synchronous traction electric machine place in operation again when train arrival stops, be that control subsystem is controlled the permanent-magnet synchronous traction electric machine again, so just avoided the permanent-magnet synchronous traction electric machine when the train high-speed cruising, to drop into the difficulty that control brings again.
Therefore, it is comparatively suitable the higher relatively permanent-magnet synchronous traction electric machine of maximum unloaded induced voltage to be installed in urban railway transit train.
Mentioned above, the permanent-magnet synchronous traction electric machine that uses high unloaded induced voltage scheme is when the control subsystem et out of order, uncontrollable situation in the time of may occurring in the train high-speed cruising, for guaranteeing that the unloaded induced voltage that produces this moment does not produce baneful influence to power system, the load contactless switch can be set between permanent-magnet synchronous traction electric machine and control subsystem, after the load contactless switch is received the cut-off signal that cooresponding control subsystem sends, disconnect contacting between described cooresponding control subsystem and the cooresponding permanent-magnet synchronous traction electric machine.
Referring again to Fig. 2, all be provided with load contactless switch 204 between each permanent-magnet synchronous traction electric machine 201 and the cooresponding inverter 202.Each inverter 202 can be controlled cooresponding load contactless switch 204 and disconnect or connect contacting between cooresponding load contactless switch 204 and the cooresponding inverter 202.Concrete, after load contactless switch 204 is received the cut-off signal that cooresponding inverter 202 sends, disconnect contacting between cooresponding inverter 202 and the cooresponding permanent-magnet synchronous traction electric machine 201, the cut-off signal that inverter 202 is received can be sent by controller 203.
In actual applications, the permanent-magnet synchronous traction electric machine can be realized the three-phase symmetrical short-circuit.Shown in Fig. 5 A and Fig. 5 B, inverter has three brachium pontis, and six switches are respectively Sa, Sb, Sc, Sa ', Sb ', Sc ', U
DcThe expression vdc, the threephase stator voltage of permanent-magnet synchronous traction electric machine is decided by the state of inverter switching device.Shown in Fig. 5 A, Sa, Sb, Sc are closed, and Sa ', Sb ', Sc ' disconnect, and are a kind of three-phase symmetrical short-circuit state this moment.Shown in Fig. 5 B, Sa ', Sb ', Sc ' are closed, and Sa, Sb, Sc disconnect, and also be a kind of three-phase symmetrical short-circuit state this moment.When power system was in stable state, the electric current on the three-phase symmetrical short-circuit was called the three-phase symmetrical short-circuit steady state current of permanent-magnet synchronous traction electric machine.
If the permanent-magnet synchronous traction electric machine is applied in the power system of train, can choose a suitable value for three-phase symmetrical short-circuit steady state current so, so that the mode of operation of power system is good.Concrete, can be according to following two kinds of factors, for three-phase symmetrical short-circuit steady state current is chosen a suitable value:
(1) do not increase the permanent magnet anti-demagnetization surplus in when design, guarantee the ability of exerting oneself of power system simultaneously;
(2) the three-phase symmetrical short-circuit is the operating mode that allows appearance in power system, and inverter needs to bear three-phase symmetrical short-circuit steady state current, and does not increase the power device current class.
If three-phase symmetrical short-circuit steady state current is greater than the maximum operating currenbt of single permanent magnet synchronous traction system, so when the rotating speed of permanent-magnet synchronous traction electric machine is elevated to a certain degree, the output voltage of inverter and three-phase symmetrical short-circuit steady state current possibly can't mate, and cause power system to work.If three-phase symmetrical short-circuit steady state current is much larger than the maximum operating currenbt of single permanent magnet synchronous traction system, so for avoiding the short circuit of permanent-magnet synchronous traction electric machine to cause the permanent magnet demagnetization, anti-demagnetization surplus when needing to increase the permanent magnet design, this does not conform to above-mentioned factor (1).If three-phase symmetrical short-circuit steady state current is less than the maximum operating currenbt of single permanent magnet synchronous traction system, so when the rotating speed of permanent-magnet synchronous traction electric machine is elevated to a certain degree, three-phase symmetrical short-circuit steady state current can approach zero, causes power system to exert oneself.If three-phase symmetrical short-circuit steady state current is much smaller than the maximum operating currenbt of single permanent magnet synchronous traction system, the impedance that permanent-magnet synchronous traction electric machine self is described so is too big, permanent-magnet synchronous traction electric machine in-to-in consumption of power is too many, and then can reduce the overload magnification of permanent-magnet synchronous traction electric machine, influence the ability of exerting oneself of power system, this does not conform to above-mentioned factor (1).Based on above-mentioned factor (1) and (2), it is proper that three-phase symmetrical short-circuit steady state current equals the maximum operating currenbt of single permanent magnet synchronous traction system.Here need to prove that single permanent magnet synchronous traction system comprises a permagnetic synchronous motor and cooresponding control subsystem.
In sum, in power system of urban railway transit train of the present invention, a control subsystem only is a permanent-magnet synchronous traction electric machine power supply, and a permanent-magnet synchronous traction electric machine is only accepted the power supply of a control subsystem.Because the rotating speed of permanent-magnet synchronous traction electric machine is directly proportional with the electric voltage frequency of acceptance, so, if by a control subsystem is a plurality of permanent-magnet synchronous traction electric machine power supplies, so can be owing to the stator frequency unanimity of these permanent-magnet synchronous traction electric machines, and cause the rotating speed of these permanent-magnet synchronous traction electric machines also consistent.But, in actual applications, wheel between generally all can exist wheel footpath poor, if the rotating speed unanimity of permanent-magnet synchronous traction electric machine, in train travelling process, taking turns right linear velocity just may be inconsistent so, this is unallowed in actual applications.So, if each permanent-magnet synchronous traction electric machine is its power supply by an independent control subsystem all, can realize the difference of permanent-magnet synchronous traction electric machine rotating speed so, thereby overcome since wheel between the inconsistent problem of the poor linear velocity that causes in wheel footpath, make that the right linear velocity of wheel is in full accord.Therefore, the present invention can realize the permanent-magnet synchronous traction electric machine is applied in the power system of urban railway transit train.
In addition, the present invention has also carried out clearly the value of unloaded induced voltage of maximum and three-phase symmetrical short-circuit steady state current, makes that the mode of operation of power system is good when the permanent-magnet synchronous traction electric machine is applied in the train dynamics system.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-OnlyMemory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a power system of urban railway transit train is characterized in that, is arranged in the motor-car of urban railway transit train, and described system comprises: a plurality of permanent-magnet synchronous traction electric machines and a plurality of control subsystem;
All permanent-magnet synchronous traction electric machines all are arranged on the bogie truck of described motor-car, for described motor-car provides power;
The quantity of permagnetic synchronous motor is identical with the quantity of control subsystem;
A control subsystem only is a permanent-magnet synchronous traction electric machine power supply, and a permanent-magnet synchronous traction electric machine is only accepted the power supply of a control subsystem.
2. the system as claimed in claim 1 is characterized in that, each control subsystem comprises a controller and an inverter respectively;
Described inverter provides voltage for cooresponding permanent-magnet synchronous traction electric machine;
Described controller is controlled the voltage of described inverter output.
3. system as claimed in claim 2 is characterized in that, the voltage that the unloaded induced voltage that any one permanent-magnet synchronous traction electric machine produces under maximum speed of revolution obtains behind diode rectification all is no more than the maxim of the input voltage of cooresponding inverter.
4. system as claimed in claim 3 is characterized in that, if the maxim of the input voltage of inverter is DC1900V, then the unloaded induction electricity line ball voltage effective value that produces under maximum speed of revolution of each permanent-magnet synchronous traction electric machine is 1400V.
5. as claim 3 or 4 described systems, it is characterized in that the stator core length of each permanent-magnet synchronous traction electric machine all is 140mm.
6. system as claimed in claim 2 is characterized in that, the voltage that the unloaded induced voltage that any one permanent-magnet synchronous traction electric machine produces under maximum speed of revolution obtains behind diode rectification all is no more than the minimum value of the input voltage of cooresponding inverter.
7. system as claimed in claim 6 is characterized in that, if the minimum value of the input voltage of inverter is DC1300V, then the unloaded induction electricity line ball voltage effective value that produces under maximum speed of revolution of each permanent-magnet synchronous traction electric machine is 930V.
8. as claim 6 or 7 described systems, it is characterized in that the stator core length of each permanent-magnet synchronous traction electric machine all is 160mm.
9. as claim 1,2,3,4,6 or 7 described systems, it is characterized in that, all be provided with the load contactless switch between each permanent-magnet synchronous traction electric machine and the cooresponding control subsystem, after described load contactless switch is received the cut-off signal that cooresponding control subsystem sends, disconnect contacting between described cooresponding control subsystem and the cooresponding permanent-magnet synchronous traction electric machine.
10. system as claimed in claim 1 or 2, it is characterized in that, the three-phase symmetrical short-circuit steady state current of any one permanent-magnet synchronous traction electric machine all is the maximum operating currenbt of single permanent magnet synchronous traction system, and single permanent magnet synchronous traction system comprises a permagnetic synchronous motor and cooresponding control subsystem.
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| CN108627736A (en) * | 2017-03-22 | 2018-10-09 | 株洲中车时代电气股份有限公司 | A kind of software inline diagnosis method that net pressure synchronizing signal is reversed |
| CN108627736B (en) * | 2017-03-22 | 2020-08-04 | 株洲中车时代电气股份有限公司 | Software online diagnosis method for reverse connection of network voltage synchronous signals |
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