JPH07250406A - Feeder system for linear motor - Google Patents

Abstract

PURPOSE:To eliminate a frequency converter by feeding a converting station corresponding to a constant speed traveling section with power of commercial frequency from a utility company and feeding the power, as it is, to a ground coil without varying the frequency. CONSTITUTION:A field unit is mounted on a linear motor car 13. A ground coil 13, disposed along a track and serves as an armature, is sectioned at every predetermined distance by means of a plurality of normal open switches 17. The ground side coil 13 installed at a variable traveling speed section is fed with power from a variable frequency power supply 10 comprising a frequency converter 12 for converting the frequency of commercial frequency power 11. The ground coil 13 installed at a constant traveling speed section is fed with power 21 of commercial frequency from a constant frequency power converting station 1 comprising a thyristor 2. This constitution simplifies the ground facility and reduces the construction cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor feeding system for supplying frequency-converted electric power to a linear synchronous motor to drive a linear motor car.

[0002]

2. Description of the Related Art Conventionally, a configuration as shown in FIG. 3 has been adopted as a linear motor feeding system for supplying a frequency-converted electric power to a linear synchronous motor to drive a linear motor car.

In FIG. 3, reference numeral 13 is a ground coil disposed on the ground side. The ground coil 13 is divided into a plurality of sections with a certain distance, and a switch which is normally open between the respective division points. 17 is connected.

Reference numeral 10 denotes a variable power source conversion station installed corresponding to each section. The variable power source conversion station 10 receives a commercial frequency electric power 11 from an electric power company and frequency-converts this electric power by a frequency conversion device 12. And supplies it to the ground coil 13.

Reference numeral 14 is a linear motor car driven by a field coil on the upper side of the vehicle and a ground coil 13 serving as an armature on the ground side. The linear motor car 14 runs at a speed according to the frequency controlled by the frequency converter 12. .

FIG. 4 shows the internal equipment configuration of the variable frequency power source converter station 10. The variable frequency power supply conversion station 10 receives a commercial frequency electric power 11 from an electric power company, a converter transformer 18 for stepping down or boosting a voltage, and a frequency conversion for performing frequency control and phase control according to a vehicle speed command. Feeding transformer 1 for stepping up or down to a voltage optimum for supplying power to the device 12 and the ground coil 13.
9, the current detector 20 for detecting the output current of the feeder transformer 19, the output current detected by the current detector 20 and the speed command value 16 are input.
The control unit 15 controls the frequency conversion device 12 based on the above, and performs phase adjustment control and frequency control of the output current.

The variable frequency power conversion station 1 having such a configuration
0 is installed in each section, and the power supplied to the ground coil 13 in the section where one linear motor car has entered is controlled by the frequency converter 12.

When the variable frequency power conversion station 10 in some sections fails and cannot supply electric power, a switch 17 provided between the division points of the ground coil 13 is provided.
By feeding and feeding from the adjacent section,
The linear motor car 14 can be continuously driven.

[0009]

As described above, in the conventional linear motor feeding system, the ground coil 13 is divided into a plurality of sections with a certain distance, and the variable frequency power source is installed corresponding to each section. Electric power is supplied from the frequency conversion device 12 in the conversion station 10, and the linear motor car 14 is running.

On the other hand, the linear motor car 14 travels while accelerating, accelerating, and decelerating under the frequency control of the frequency converter 12, and it is expected that the section traveling at constant speed will become long especially when the stations are long. .

Accordingly, one variable frequency power conversion station 10
The entire power feeding section managed by the vehicle may be a constant speed traveling section, and the adjacent power feeding section may also be a constant speed traveling section.

However, in the linear motor feeding system as described above, the variable frequency power source conversion station 10 is installed corresponding to each section, and the frequency conversion device 12 is provided in each conversion station. The equipment becomes complicated, and the equipment cost increases, which is uneconomical.

The present invention has been made to solve the above problems, and an object thereof is to provide an economically advantageous linear motor feeder capable of eliminating excess equipment and simplifying the entire system. To provide a system.

[0014]

In order to achieve the above object, the present invention provides a linear motor car by supplying frequency-converted electric power to a linear synchronous motor having a field side on the vehicle side and an armature on the ground side. In a linear motor feeding system for traveling, the ground coil serving as an armature disposed on the ground side is divided into an acceleration / deceleration traveling section and a constant speed traveling section, and conversion is installed corresponding to the acceleration / deceleration traveling section. A frequency conversion device for converting commercial frequency power into variable frequency power and supplying it to the ground coil in the section is installed in the place, and the commercial frequency power is directly supplied to the conversion station installed corresponding to the constant speed traveling section. The power supply means for supplying the ground coil in the section is provided. Further, the power supply means is provided with a phase control means for adjusting the voltage of the commercial frequency power by the phase control by the thyristor switch and supplying it to the ground coil.

[0015]

In the linear motor feeding system having such a configuration, power of commercial frequency is received from the electric power company to the conversion station corresponding to the constant speed traveling section, and the ground is used as it is without changing the frequency. Since power is supplied to the coil, it is not necessary to provide a frequency conversion device as in the conventional case, and the facility can be simplified.

Further, by adjusting the voltage of the electric power of the commercial frequency by the phase control by the thyristor switch by the phase control means provided in the electric power supply means and supplying it to the ground coil, the supply amount of the running energy is adjusted and the linear motor car is provided. It is possible to smooth the approach when passing through the division points between the sections.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing a configuration example of a linear motor feeding system according to the present invention, and the same parts as those in FIG. 3 are designated by the same reference numerals.

In FIG. 1, reference numeral 13 is a ground coil disposed on the ground side, and this ground coil 13 is divided into a plurality of sections with a certain distance, and a switch which is normally in an open state between the respective division points. 17 is connected. In this case, among the plurality of sections, the section in which the linear motor car travels at a constant speed is defined as the constant speed travel section, and the section in which the linear motor car travels by acceleration and deceleration is defined as the variable speed travel section.

Reference numeral 10 denotes a variable power source conversion station installed corresponding to a variable speed traveling section. The variable power source conversion station 10 receives commercial power 11 from a power company and frequency-converts this power by a frequency converter 12. And supplies it to the ground coil 13.

Further, 1 is a constant frequency power conversion station installed corresponding to a constant speed traveling section, and this constant frequency power conversion station 1 receives power 21 of commercial frequency from an electric power company and frequency-converts this power. Power is supplied to the ground coil 13 via the thyristor switch 2 without any operation.

Reference numeral 14 is a linear motor car magnetically coupled to the ground coil 13. This linear motor car 14 responds to a variable frequency when frequency-controlled power is supplied from the frequency converter 12 of the variable power source converter station 10. The vehicle travels at a constant speed, and when constant frequency power is supplied from the constant frequency power conversion station 1 through the thyristor switch 2, the vehicle travels at a constant speed.

FIG. 2 shows an example of the equipment configuration in the constant frequency power conversion station 1. In this constant frequency power conversion station 1, a step-down transformer 22 that receives electric power of a commercial frequency from an electric power company and steps down a voltage, a linear motor car runs at a constant speed,
In addition, the thyristor switch 2 that controls the phase of the voltage so as to smooth the entry when passing through the division point, the step-up transformer 23 that steps up to a voltage suitable for supplying power to the ground coil 13, and this step-up transformer. A current detector 24 for detecting the output current of 23 and a phase controller 25 for controlling the phase of the thyristor switch 2 based on the output current detected by the current detector 24.

In the near motor feeding system configured as described above, when the linear motor car is present in the variable speed traveling section, the frequency converter 12 of the variable power source converter station 10 is used.
The vehicle travels at a speed according to the frequency controlled by. Then, when the linear motor car enters the constant speed traveling section from the variable speed traveling section, the frequency conversion device 12 supplies the commercial frequency power 21 for supplying power to the ground coil 13 in the constant speed traveling section.
Acceleration / deceleration control that matches the frequency and phase is performed, and crossover control is performed with the constant frequency power conversion station in a synchronized state.

Next, when the linear motor car is present in the constant-speed traveling section, the constant-frequency power supply substation 1 receives the commercial-frequency power 21 and transfers it to the ground coil 13 via the thyristor switch 2 without frequency conversion. The linear motor car runs at a constant speed by supplying electric power.

In this case, the thyristor switch 2 is phase-controlled based on the current detected by the current detector 24 so that the current value of the required thrust of the linear motor car is reached, and the output voltage is adjusted. In addition, the phase is controlled based on the current detected by the current detector 24 and the output voltage is adjusted so that the current value corresponding to the required thrust is also obtained when crossing between the division points.

On the other hand, when the linear motor car is traveling in the constant-speed traveling section, the constant-frequency power source conversion station 1 breaks down, making it impossible to supply power to the ground coil 13 or changing the speed. In some cases, a switch 17 provided between the section where the linear motor car exists and the section adjacent to the section
And the electric power is exchanged from the conversion station in the adjacent section, the linear motor car can be continuously driven and the speed can be changed.

As described above, according to the structure of the present embodiment, the frequency converter is not required to be provided in the converter for supplying electric power to the constant speed traveling section in which the linear motor car travels at a constant speed. As compared with the case where variable frequency conversion stations are installed in all running sections of the linear motor car as described above, the system configuration can be simplified and the facility cost can be significantly reduced.

Further, since the commercial frequency power received by the constant frequency power conversion station 1 is voltage-controlled by the phase control by the thyristor switch and supplied to the ground coil, the amount of traveling energy supplied can be easily adjusted. In addition to being able to perform, it is possible to smooth the approach when the linear motor car passes through the division points.

[0029]

As described above, according to the present invention, it is possible to provide an economically advantageous linear motor feeding system capable of eliminating excess equipment and simplifying the entire system.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a linear motor feeding system according to the present invention.

FIG. 2 is a circuit diagram of a device configuration of a constant frequency power conversion station in the embodiment.

FIG. 3 is a system configuration diagram showing a conventional linear motor feeding system.

FIG. 4 is a circuit diagram showing a device configuration of a variable frequency conversion station shown in FIG.

[Explanation of symbols]

1 ... Constant frequency power converter, 2 ... Thyristor switch,
10 ... Variable frequency power supply device, 12 ... Frequency conversion device, 13 ... Ground coil, 17 ... Switch, 22 ... Step-down transformer, 23 ... Step-up transformer, 24 ... Current detector,
25 ... Phase control device.

Claims (3)

[Claims] 1. A linear motor feeding system for running a linear motor car by supplying frequency-converted electric power to a linear synchronous motor having a field side on the vehicle side and an armature on the ground side. The ground coil to be the armature is divided into an acceleration / deceleration traveling section and a constant speed traveling section, and the commercial frequency power is converted into variable frequency power at a conversion station installed corresponding to the acceleration / deceleration traveling section. A frequency converter for supplying the ground coil of the section is provided, and a power supply means for supplying the commercial frequency power as it is to the ground coil of the section is provided at a conversion station installed corresponding to the constant speed traveling section. Linear motor feeding system characterized by. 2. The linear motor feeding system according to claim 1, wherein the power supply means includes a phase control means for adjusting the voltage of the commercial frequency power by phase control using a thyristor switch and supplying the ground coil with the phase control means. Characteristic linear motor feeding system. 3. The linear motor feeding system according to claim 1, wherein a switch which is normally open is provided between the ground coil division points in the acceleration / deceleration travel section and the constant speed travel section, and the conversion station A linear motor feeding system characterized in that the switch is closed to receive power interchange from a conversion station in an adjacent section in the event of a failure or a need for speed change.