JPH048102A - How to configure a power supply circuit for linear motor railways - Google Patents

Abstract

PURPOSE:To continue operation even when one winding is faulty by splitting six-phase thrust windings on the ground side of a linear motor railroad into two groups comprising three every other windings and feeding both groups with three-phase powers having same phase and reverse polarity through a switch. CONSTITUTION:A plurality of pairs of N pole and S pole electromagnets are disposed longitudinally and laterally on a traveling vehicle 1. Six-phase thrust windings 3, levitation winding and guidance winding(not shown) are arranged along a traveling rail on the ground. Six six-phase thrust windings 3 are ar ranged, with a pitch of 60 deg. electrical angle, between the N and S poles. Every other thrust windings are then combined into two groups of U-W phases 4 and -U - -W phases 5 and a voltage subjected power conversion 8 is fed through a feeder 7 and a switch 6 to both groups. AC three-phase voltages having same phase, same amplitude and reverse polarities are fed to the groups. (In the drawing, only U and -U phases are shown, but the other phase is simi larly split and fed.) Consequently, three-phase operation is sustained through the other winding group even where one winding group is faulty.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of configuring a power supply circuit for a six-phase linear motor.

[Conventional technology]

In the conventional power supply circuit configuration, the propulsion winding unit was not divided as shown in Patent No. 979735.

For this reason, if one coil in a propulsion winding unit breaks, the propulsion winding unit (normally about 2 to 3 times the length of the train)
In many cases, it becomes impossible to operate due to defects.

[Problem to be solved by the invention]

The above conventional technology does not take into account failures.

There was a problem with railways that had to operate constantly, such as commercial lines. An object of the present invention is to enable operation even when a propulsion winding fails, and to operate a 6-phase linear motor using a 3-phase power supply circuit.

[Means to solve the problem]

In order to achieve the above object, a method for configuring a power supply circuit for a linear motor railway according to the present invention includes mounting a field on a running vehicle,
In a method for configuring a power supply circuit for a linear motor railway in which six-phase propulsion windings are arranged on the ground, a first propulsion winding unit in which three windings of every other six-phase propulsion winding are combined; A second propulsion winding unit is a combination of three windings other than the propulsion winding unit, and each phase of the first propulsion winding unit is connected to the three-phase feeder line through a switch, respectively. Each phase of the second propulsion winding unit has a polarity opposite to that of the first propulsion winding, and is connected to a three-phase feeder line having the same phase as the three phases through a separate switch, thereby forming a six-phase propulsion winding. It is characterized by its composition of lines.

In addition, in order to achieve the above object, another method of configuring a power supply circuit for a linear motor type railway according to the present invention is a linear motor type railway in which a field is mounted on a running vehicle and a six-phase propulsion winding is arranged on the ground. In a method for configuring a railway power supply circuit, a first propulsion winding unit is constructed by combining three windings of every other six-phase propulsion winding, and a second propulsion winding unit is constructed by combining three windings other than the first propulsion winding unit.
The first propulsion winding unit is divided into propulsion winding units, each phase of the first propulsion winding unit is connected to a three-phase feeder line through a switch, and the winding direction of each phase of the second propulsion winding unit is set to the third propulsion winding unit. It is characterized in that it is connected to three-phase feeder lines through separate switches in the opposite direction to the one-propulsion winding to form a six-phase propulsion winding.

[Effect]

One propulsion winding unit connected in 3 phases can generate 3 in this circuit alone.
It works as a 6-phase linear motor, and when combined with one other propulsion winding unit, it works as a 6-phase linear motor.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1A and 1B. The running vehicle 1 includes an electromagnet 2 composed of a superconducting magnet or the like.
There are several. Since this electromagnet 2 is also used for levitation of a traveling vehicle, a plurality of electromagnets are usually provided at the front, rear, left and right sides of the traveling vehicle 1, assuming a pair of north and south poles. A propulsion winding, a levitation winding, a guide winding, etc. are provided on the ground track, but only the propulsion winding 3 is shown in this figure.

The 6-phase linear synchronous motor has an N pole and a S pole length of 360 electrical degrees, and six propulsion windings with a pitch of 60 degrees are arranged in this motor, and the windings are adjusted to match the relative position of the electromagnet 2 of the traveling vehicle 1. Operates with sine waves with a 60 degree phase shift.

As shown in FIG. 1B, the propulsion windings 3 of each phase are connected in series to a length two to three times the normal train length.

As shown in the figure, the first winding consists of three phases, U, V, and W.
Propulsion winding unit 4 and -U.

The second propulsion winding unit is divided into 5 units consisting of 3 phases of V and -W,
The connection of the propulsion winding of the second propulsion winding unit 5 is different from that of the first propulsion winding unit, in which the beginning and end of the propulsion winding are connected in reverse.
It is connected so that when a current of the same phase as the propulsion winding unit is passed, the direction of magnetic flux generation is opposite polarity. Here, Ne is a code indicating neutral. Another way to generate magnetic flux of opposite polarity is to use a propeller wound in the opposite direction (it is the same even if the same propulsion winding is turned over 180' and wired the same as the first propulsion winding). Reversing the current direction in each propulsion winding is being considered.

In Figure 1A, only the connection of the U phase of the first propulsion winding unit 4 is shown, but the W phase is also connected in the same way and wired as in the first propulsion winding unit 4 of Figure 1B. . The second propulsion winding unit 5 similarly shows an example of connection of only the -U phase, but
Propulsion winding 3 uses the same propulsion winding as the U-phase, but the connections at the beginning and end of winding 5 are reversed. These propulsion winding units are connected to a feeder line 7 via a feeder section switch 6 .

As shown in FIG. 1A, the first propulsion winding unit 4 and the second propulsion winding unit 5 are connected to separate feeder lines 7, and separate power conversion groups [8
If one of the propulsion systems fails, the remaining propulsion system will continue to operate.

Although FIG. 2 shows the same six-phase linear motor, it is an example in which three sets of propulsion windings 9 are arranged in two rows, and the propulsion windings can be connected in the same way as the propulsion windings in FIGS. 1A and 1B.

3A and 3B show the connection of a conventional six-phase linear motor, in which six phases constitute one set of propulsion winding units 11.

FIG. 4 is a diagram showing a conventional power supply method for a six-phase linear motor. The 6-phase propulsion winding unit 11 shown in FIG. This is a double power system in which two power converters 14 alternately supply power to the propulsion winding unit 11 in which the vehicle is located, with some portions of the power converter 14 being connected to the power converter 14 .

FIG. 5 shows an embodiment in which the present invention is applied to the conventional double feeding system (FIG. 4). This is an example in which the first propulsion winding unit 4 and the second propulsion winding unit 5 are separated at the same position in the track length direction and connected to the same feeder line 7. The difference from Figure 4 is that the number of feeder lines in one power supply system is 7 (6 phases + N) to 4 (3 phases + N).
e) Since the six-pronged propulsion winding unit, which has been reduced to
The number of internal switches is the same except that the switchgears have been changed to three sets and two switches. With this configuration, if the propulsion winding unit of the 1st system fails, the feeder section switch is opened and the normal 1st system can be operated. However, if the power converter fails, it becomes inoperable, so a triple feed system as shown in FIG. 6 has been considered.

FIG. 6 is a block diagram showing a conventional triple feeding system. In the figure, the first propulsion winding unit and the second propulsion winding unit are arranged 1/2 apart from each other in the track length direction, and are connected to the feeder line 7 alternately via the feeder section switch. power conversion device 8
power is sequentially supplied to the propulsion winding units at the position of the traveling vehicle.

When the traveling vehicle is at the boundary of the propulsion winding unit, two six-phase power converters are operated in the double feeding system. In triple feeding, there are three three-phase power converters, and from the perspective of the power converters, the triple feeding system is advantageous. However, in the triple feeding system, as shown in Fig. 6, after power is supplied to the propulsion winding unit n by the power converter A, the propulsion winding unit to which the power converter A first supplies power is n+3, which is 180% from the previous phase. It is necessary to operate in different phases. For this reason, it was necessary to operate with different phases depending on which propulsion winding unit was used. Even if the present invention is applied to the triple feeding system shown in FIG. 6, the configuration diagram will not be changed.

7A and 7B show the operating current patterns of the power converter according to the method of the present invention, and FIGS. 8A and 8B show the operating current patterns of the power converter according to the conventional method for comparison. The operating current pattern 10 is A of each power converter 8,
Only one phase B and C are shown, FIGS. 7A and 7B show the operating current pattern of the present invention, and FIGS. 8A and 8B show the conventional operating current pattern.

When the traveling vehicle 1 is now at the x0 position, the power conversion device of the present invention! 8 A and B are operated with the same operation pattern, whereas in the conventional system, they are operated with operating current patterns that are 180 degrees out of phase. Furthermore, at the X1 position, (x
The relative positional relationship between the field magnet at the o position and the propulsion winding is the same position),
In the present invention, the operating current pattern is the same, but in the conventional system, even if the power converter A is the same, the propulsion winding units to be excited are different, so it is necessary to operate with a phase change of 180 degrees, making control complicated.

〔Effect of the invention〕

According to the present invention, the conventional 6-phase operation can be controlled with only 3 phases, so the number of feeder wires is reduced in the double feeding system, and 3 groups are divided into 2 for b-phase operation, so the feeder wires No. 1
Even in the event of system failure, three-phase operation is possible with the remaining system. In the triple feeding system, three sets of circuits divided into two can be operated in the same phase, so the operating current pattern for all three power converters can be the same, making control easier.

[Brief explanation of the drawing]

FIG. 1A is a configuration diagram showing an embodiment of a 6-phase linear motor power supply circuit according to the present invention, FIG. 1B is a diagram showing connections of each phase in units of propulsion windings in FIG. 1A, and FIG. A diagram showing an example in which the set propulsion winding units are arranged in two rows in the running direction, FIG. 3A is a configuration diagram of a conventional 6-phase linear motor power supply circuit, and FIG. 3B is a connection diagram of the circuit shown in FIG. 3A. FIG. 4 is a block diagram of a conventional double feeding method using a six-phase linear motor, and FIG. 5 is a diagram showing an example of a double feeding circuit configuration to which the power feeding circuit according to the present invention is applied.
FIG. 6 is a diagram showing an example of the power supply circuit configuration of the conventional triple feeding method, FIGS. 7A and 7B are diagrams showing operating current patterns of the power converter according to the method of the present invention, and FIGS. 8A and 8B. 1 is a diagram showing an operating current pattern of a power conversion device according to a conventional method. DESCRIPTION OF SYMBOLS 1... Traveling vehicle, 2... Electromagnet, 3... Propulsion winding, 4... First propulsion winding unit, 5... Second propulsion winding unit, 6... Feeding power classification Switch, 7...Feeding wire, 8...
- Power converter, 9... Propulsion winding, 11... Propulsion winding unit, 12... Feeding section switch, 13... Feeding line, 14... Power converter.

Claims (1)

[Claims] 1. In a method for configuring a power supply circuit for a linear motor railway in which a field is mounted on a running vehicle and six-phase propulsion windings are arranged on the ground, every other six-phase propulsion winding is The first propulsion winding unit is divided into a first propulsion winding unit, which is a combination of three windings, and a second propulsion winding unit, which is a combination of three windings other than the first propulsion winding unit.
Each phase of the propulsion winding unit is connected to a three-phase feeder line through a switch, and each phase of the second propulsion winding unit is connected to a separate switch with the polarity opposite to that of the first propulsion winding. A method for configuring a power supply circuit for a linear motor type railway, characterized in that a 6-phase propulsion winding is constructed by connecting to three-phase feeder lines having the same phase as the three phases through the three-phase power supply line. 2. In the method of configuring a power supply circuit for a linear motor railway in which a field is mounted on a running vehicle and a 6-phase propulsion winding is placed on the ground, every other 6-phase propulsion winding is combined with 3 windings. It is divided into a first propulsion winding unit and a second propulsion winding unit which is a combination of three windings other than the first propulsion winding unit, and each phase of the first propulsion winding unit is connected through a switch. It is connected to a three-phase feeder line, and the winding direction of each phase of the second propulsion winding unit is opposite to that of the first propulsion winding, and the winding direction of each phase of the second propulsion winding unit is opposite to that of the first propulsion winding. A method for configuring a power supply circuit for a linear motor type railway, characterized in that a 6-phase propulsion winding is configured by connecting to a 3-phase feeder line.