JPS5825039B2 - Linear motor control unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a linear synchronous motor (hereinafter referred to as TI, SM).

), and relates to a power supply device for a near motor.

This is the driving source for the ultra-high-speed railways that are currently attracting attention.

Although an LSM is employed as a power source, a cycloconverter or the like is considered desirable as a device for supplying power to this LSM.

In this case, due to the advantages such as the number of accelerators in the cycloconverter and the limitation of short-circuit current in the event of a serious erroneous ignition accident, 12
An H-phase connection system is considered appropriate, and an example of a power supply system using four of the above-mentioned cycloconverters as shown in FIG. 1 has been considered.

That is, in FIG. 1, C0NV1, C0NV2°C0
NV3. C0NV4 is a 12-phase H-connection type cycloconverter, FDl and FD2 are the first and second feeder groups, among which the feeder line al of the feeder groups FD1 and FD2 is
, bI, and the output terminal of the cycloconverter C0NVI is connected between the feeder lines a2 and b2.
The output end of 0NV2 is connected to the feeder line a3. Between b3, the output end of the cycloconverter C0NV3 is connected to the feeder line a4, b
The output terminals of the cycloconverters C0NV4 are connected between the four terminals, respectively.

Ul r U2? U3”・[J n y Vl v
V 2 t V3””V n tWl, W2. W3・
. . . Wn is the UVW phase ground coil of the LSM divided into each section. Among these, the U phase ground coil U1 is connected to the feeder group FD1 through the section switch S1. FD2 feeder line a1. Between b1, ground coil ■1 of phase ■ is connected to W between feeder line a2 and b2 via section switch S2.
The ground coil W1 of the phase is connected between the feed lines a3 and b3 via the section switch S3, and the ground coil U2 of the U phase is connected between the feed lines a4 and b4 via the section switch S4 in the same manner as described above. Connect coils Un, Vn, and Wn in order.

SWl, SW2...SWn are the section switchers S1. S2. ...Switching command switch that gives a switching command to Sn, C0NT is the switching command switch SWI
, SW2, . . . is a control line that gives a control command of SWn and a power generating brake command of C0NV4 to the cycloconverter C0NV1.

In response to the control command on the control line C0NT, the switching command switches SWI, SW2 . ... When a section switch command is given to the section switchers Sl, 82...Sn in a predetermined relationship by SWn, the ground coil of the LSM switches to Ul-
Vl-W1PU2-V2-W2. . . . feed line group FD1. Each cyclocomparer 1C connected to FD2
0NV1. C0NV2. C0NV3. Power is sequentially supplied from the C0NV41c and the magnets are excited.

However, according to such a conventional power supply device, L
Since the ground coil on the SM side is completely divided into each section, when power is supplied by four cycloconverters, the receiving capacity increases when crossing sections, and the isometric phase current on the receiving side is determined by the power supply system. For example, when a train crosses a section, combined power supply is required, which causes pulsations in the thrust regeneration force, making smooth control impossible.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power supply device for a linear motor that can smoothly supply power to a linear motor and eliminate the above-mentioned disadvantages.

Hereinafter, one embodiment of the present invention will be explained according to FIG.
In this case, the same parts in FIG. 2 as in FIG. 1 are designated by the same reference numerals.

That is, in FIG. 2, the cycloconverter is C0NVI,C
0NV2. ...3 units of C0NV3, and feeder group F
D1 and FD2 are respectively connected to the feeder lines a1. a2. a3 and b
l, b2. It is composed of b3.

On the other hand, each of the silk ground coils U, V, and W of the LSM is wound continuously, and the lead wire U1. Vl.

Wl, C2, ■2. W2...Un, V, ,Wo are derived.

Also, the section switch S1. S2...Sn is the neutral point N corresponding to each silk ground coil U, V, W of the LSM, respectively.
A changeover switch SS1° SS2. SS3, among which a changeover switch S81 of the section changeover S1
connects the movable piece C to the lead-out line U1, one fixed piece a to the power supply line a1, and the other fixed piece A to the power supply line b1, and the changeover switch SS2 connects the movable piece C to the lead-out line 1, one fixed piece a is connected to the power supply line a2 and the other fixed piece is connected to the power supply line b2, and the changeover switch SS3 connects the movable piece C to the lead-out line W1 and one fixed piece a to the power supply line b2. Connect the other fixed piece to the power supply line a3 and the power supply line b.
Thereafter, the section changeover switches S2, 83, . . . , Sn are connected as shown in the same manner as described above.

Next, the operation of the present invention configured as described above will be described. For example, if the train TR is running in the right direction in the figure and the train TR is currently entering between points 4142, the changeover command switch SW1 Accordingly, each changeover switch ssi of the section changeover device S1.

SS2. SS3 connects the movable piece C to the fixed piece a side, and each changeover switch SS1゜SS of the section switch S3
2. SS3 switches to the movable piece C by switching command switch SW3.
The fixed piece is connected to the side.

At this time, the section changeover device S2 switches each changeover switch SS1. The movable pieces C of SS2 and SS3 are located at a neutral point N.

Furthermore, the movable pieces e of the other section switching devices 84, 85, 86, .

As a result, among the silk ground coils U, V, and W of the LSM, section A, that is, the lead line U1. V1. W1 and U3. ■３
．． The ground coil between W3 is connected to feeder group FD1. FD2 is connected between each cycloconverter C0NV1. C0NV2
．． Power is supplied from C0NV3 and it is excited.

Therefore, the train TR can travel rightward to point Z3.

After that, when the train TR reaches the position just before point Z2, the section changeover switch S2 is activated by the changeover command switch SW2.
Each selector switch SS1. SS2. SS3 connects the movable piece C from the neutral point N to the fixed piece a side, and at the same time, the changeover command switch SW4 causes each changeover switch SSI, 882. SS3 connects the movable piece C from the neutral point N to the fixed piece.

After the train TR enters section B, the section changeover switch S
The movable pieces C of each changeover switch 1 and 83 are connected to a neutral point N.

As a result, section 131 of each silk ground coil of LSM
Tangled lead line U2. v2. W2 and U4e V4゜W4
The ground coil between is connected to the feeder group FD1. Connected between FD2 and each cycloconverter C■JVL■NV2゜C0NV
Since electric power is supplied and excited from 3, the train TR runs further to the right.

Next, train TR arrives at point Z3. When the position immediately before entering between Z4 is reached, the changeover command switch SW3 causes each changeover switch SS1, SS2, . SS3 moves the movable piece C from the neutral point N to the fixed piece a side, and at the same time, the section changer S is moved by the changeover command switch SW5.
Each of the changeover switches SSI, SS2, and 883 of 5 is connected from the neutral point N to the fixed piece side of the movable piece C.

As a result, the ground coil in section C is energized, allowing the train TR to travel further to the right to point Z5.

Further, after the train TR enters section C, each movable piece C of each changeover switch of section changeover devices S2 and 84 is controlled by changeover command switches SW2 and SW4.

The neutral points are connected.

Next, when the train TR reaches the position just before the point Z4, the changeover command switch SW4 causes the changeover switches SSI, SS2, 883 of the section changeover S4 to simultaneously switch the movable piece C from the neutral point N to the fixed piece a side. .

The changeover command switch SW6 causes each changeover switch SSI, SS2 . SS3 connects its movable piece C from the neutral point N to the fixed piece side, and the ground coil in the section is energized, and the train TR runs further to the right. Section E,
The ground coils F... are sequentially excited, and the train TR is driven to the right accordingly.

That is, the above section switching operation can be summarized as follows.

The movable piece C of 82 is at the neutral point N at the moment when the train TR enters the section N.

The train TR continues further and just before reaching point Z2,
The movable piece C of S2 is connected from the neutral point N to the fixed piece a side by a changeover command switch SW2.

This changeover command switch SW2, as well as other command switches, is commanded from the control line C0NT based on position detection information detected as the train TR progresses.

Therefore, when train TR travels within section A.

Section switch S from point Z1 to just before point Z2
Power is supplied to the ground coil at 1 and 83.

In addition, if the train Tf (enters section B), the section changeover switch S2
, 84, power is supplied.

That is, electric power is supplied corresponding to the section where the train TR is located.

Therefore, section switch S2. When S4 is closed to one side, section B is supplied with power, and immediately after train TR enters section B, changeover command switch 5VV1.
By SW3, the section switch 81, S3 is immediately switched from the fixed side to the neutral point N side.

Below section C is 83. S5 is also 84.8 in the section
6...and so on, and power is supplied at section crossing points Z1 to Z6...Z.

For example, during the period before and after the train is entering the section, the fixed pieces of section switches S4 and 83 are both closed and 83 is closed.
Although a state in which power is supplied redundantly due to the power supply path S4 occurs, since the potentials are the same, there is no problem in excitation of the ground coil as the train moves.

By the way, in order to excite the ground coils in the linear motor, it is sufficient to supply power only to the traveling section as the train moves. For example, it is not a good idea to excite all the ground coils because this increases the capacity of the power converter.

Therefore, in order to supply power only to the section where the train is entering, and to provide no power to other sections that are not immediately related to the train's progress, the contact point of the section switch several sections later is located on the N side. .

Incidentally, FIG. 3 shows the operation order of each section switching device as the train progresses.

As described above, according to the present invention, by switching the section switching device with a neutral point in response to a switching command according to the train position, power can be continuously supplied to the ground coils before and after the train and to a plurality of cycloconverters. Compared to conventional power supply devices, this system can reduce the increase in power receiving capacity when a train crosses between sections, and can also reduce equal-controlled negative sequence current, and can also reduce the pulsation of thrust and regenerative power when a train crosses between sections. Therefore, smooth power supply can be expected.

Further, according to this power supply system, when a train is detected at point Z1, for example, the section switch 81. S3, point Z
2, section switchers S2 and S4 are activated by cyclically repeating odd-numbered and even-numbered sections, which not only simplifies operation, but also facilitates backup and failure detection. .

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing a conventional linear motor power supply device, Fig. 2 is a circuit diagram showing an embodiment of the linear motor power supply device according to the present invention, and Fig. 3 is a timing chart for explaining its operation. It is a chart. LSM・・・Linear synchronous motor, C0N
v1゜C0NV2. C0NV3. C0NV4・・・・・・
・Cyclo converter, FDl, FD2...
Feed line group, Sl, S2゜S3...Sn...Section switch, SWl, SW2゜SW3...SW
n...listening switch, C0NT/music/control line, TR
······train.

Claims (1)

[Claims] 1. Continuously wind the ground coils for each phase of the near motor that drives the moving body, lead out lead wires for each predetermined section from this ground coil, and attach neutral points to the lead wires corresponding to each phase of the ground coil. A section changeover having a changeover switch provided with is connected, and when the moving body comes to the above-mentioned lead line position, the corresponding section changeover and a predetermined number of section changeovers beyond this are connected in pairs. At the same time, the section switchers that were already in the closed state are sequentially switched to the neutral point, and power is supplied from multiple cycloconverters to the ground coils between each section, and the power supply device for the near motor.