JPH09219902A - Power collector of train - Google Patents

Abstract

(57) [Abstract] [Problem] In many cases, current collection of electric train is performed from a conductor (third rail) through a wheel and a pantograph,
When the transportation speed is increased, a pantograph or the like that is in frictional contact is worn and there is a dislike of shortening the life of the pantograph. An object of the present invention is to provide a train current collector equipped with means for preventing the occurrence of this phenomenon. SOLUTION: In a train current collector including a power source 3, a drive source 4, and an electrode device 5, air is collected between a vehicle 1 and a conductor (third rail) 2 and an electrode 51 for current collection. A gap is provided to collect current in a non-contact manner with the drive source 4, and the air gap is monitored through a sensor so that the air gap is always constant, and servo calculation is performed to control the position of the electrode. It prevents the gap from fluctuating and the energization resistance fluctuating, which enables stable long-life running.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current collector for collecting electric power from a train running at high speed, and to a train current collector using an electrode device applied to the train.

[0002]

2. Description of the Related Art Conventional train current collecting means uses a wheel and a pantograph for rails and conductors (third rail).
Most of the time, the current was collected by contacting with the surface and rotating or sliding friction [hereinafter, referred to as "conventional example"].

[0003]

However, in the conventional example, when the traveling speed of the train is increased to improve the transportation efficiency, the life of the pantograph or the like which is in sliding friction is shortened, and only by that. However, there is a concern that the pantograph may not follow the bending of the feeder conductor (third rail) and may be in a non-contact state, and a good running state may not be achieved. Here, the present invention provides a current collector for a train capable of non-contact and stable current collection even when traveling at high speed from a feeder (third rail) so as to solve the problems of the conventional example. With the goal.

[0004]

In order to solve this problem, the present invention provides feedback control between the feeding conductor (third rail) and the current collecting electrode so that the air gap becomes constant, Non-contact current collection through a fixed gap.
By doing so, it is possible to run at high speed without friction, keep the air gap of the current collection path constant, and stably run the train at high speed by stable current collection.
Further, in the actuator means for non-contact current collection through a fixed gap, a highly responsive actuator often has a small controllable stroke. When this happens, the control range may be exceeded and stable current collection may be impaired.Therefore, the electrode is displaced together with the actuator, and the stroke is larger than that of the actuator.
A second actuator having a low frequency characteristic is provided side by side to double-control the gap.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention comprises a power source, a driving source, and an electrode device, and the power source collects power from a feeding conductor which is a third rail via the electrode device. In a current collector of a train traveling by supplying electric power to the drive source, an electrode facing the feeding conductor across an air gap provided in the electrode device is made movable with respect to the traveling train car. Along with this, a train current collector that collects and travels while maintaining a constant air gap between the feeder and the electrode, eliminates friction and enables high-speed travel. , It has the effect of keeping the air gap of the current collection path constant and allowing the train to travel at high speed stably by stable current collection.

According to a second aspect of the present invention, the electrode, an actuator that attaches the electrode through an insulating member and operates the electrode, a gap sensor that detects the air gap and sends a gap detection value, and A drive device that drives the actuator, and calculates the phase from the gap deviation between the air gap command value and the gap detection value.
A gap controller for controlling, and an insulating cable connecting the electrode and the power source, the gap controller works in response to the gap detection value, and the gap controller gives a command to the driving device to drive the actuator. 2. The train current collector according to claim 1, characterized in that the air gap is maintained constant by driving a train, and an air gap is provided between the feeding conductor (third rail) and the collecting electrode. Feedback control is performed so that the gap becomes constant, and non-contact current collection can be performed through the constant gap.

According to a third aspect of the present invention, a movable element core to which the electrode is fixed, a displacement detection rod fixed to the movable element core, and the electrode and the displacement detection rod are supported so that they can slide in parallel. A guide, a stator composed of two electromagnets facing the mover iron core through a gap, and a displacement sensor for detecting the position of the mover iron core with respect to the stator.
Two amplifiers for supplying a current to the stator, a comparator for comparing the command value signal and the detection value signal to derive a gap deviation between the two, a control signal from the gap controller and the displacement sensor. A compensator for receiving a displacement signal and giving a command to the two amplifiers so as to compensate a supporting force exerted on the movable iron core by the stator so as to be in a proportional relationship with a command of the controller; The train current collector according to claim 2, wherein feedback control is performed so as to be equal to the command value of the air gap. The feedback control is performed accurately and quickly, and the sliding operation of the electrodes is performed smoothly. Have an effect.

According to a fourth aspect of the present invention, the compensation signal from the compensator is applied to one of the two amplifiers to lower or raise the electrode, or a bias is applied to both to increase one. At the same time, the other is decreased to lower and raise the electrode, and the current collector of the train according to claim 3, wherein the electrode is used even for a transient displacement of an extremely minute time. Has the effect of playing a biasing role in maintaining the position. The invention according to claim 5 is
One of the two stators is replaced by a spring, and the electrode is constantly pressed in a specific direction, and the other stator generates a force in a direction opposite to the specific direction to generate the air gap. The present invention provides a train current collecting device according to claim 3, characterized in that the stator is held and controlled in a constant manner. The effect of reducing the cost of the facility and simplifying the facility based on the reduction of one stator is provided. Have.

According to a sixth aspect of the present invention, the electrode has a high frequency characteristic and the first constituent means of the actuator which responds to a large displacement with a low frequency characteristic with respect to the feeder. 3. The train current collector according to claim 2, further comprising: a second constituent means of the actuator corresponding to a small displacement, and a rapid efficiency corresponding to a magnitude of the displacement. This has the effect of enabling a specific electrode sliding operation.

According to a seventh aspect of the present invention, there is provided a first actuator and a second actuator for moving the electrode together, and the first and second actuators are provided as means for varying the air gap. A drive device for the first and second actuators, and first and second gap controllers for feeding back a signal from the gap sensor to control the phase and command the first and second drive devices. , The stroke of the electrode of the gap control loop including the second actuator is
And a frequency band of the gap control loop including the first actuator is higher than a frequency band of a gap control loop including the second actuator. According to another aspect of the present invention, there is provided a train current collector, which has the function of more reliably performing superimposed electrode movement. Claim 8
The invention according to claim 1 is characterized in that the feeder is configured in a rail shape laid on a fixed portion facing the traveling train. This is a train current collector, and has an effect that the fluctuation of the conductor (third rail) is relatively small even when the vehicle is running at high speed, and the air gap can be adjusted in a short time.

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is an explanatory diagram showing a schematic configuration of a main part of a train to which the present invention is applied. In FIG. 1, 1 is a vehicle, 2 is a feeding conductor (third rail), 3 is a power source, 4 is a driving source, 5 is an electrode device, and 51 is an electrode. The electrode 51 is provided so as to face the feeding conductor (third rail) 2 via a predetermined air gap, and is mounted on the electrode device 5 fixed in the vehicle 1 so as to be slidable in the vertical direction. When the vehicle 1 is traveling and the air gap is about to fluctuate due to irregularities on the surface of the conductor (third rail) 2, etc., the electrodes are received in response to a gap detection signal from a gap sensor (not shown in FIG. 2 and below). Device 5 slides up and down
The air gap is kept constant by displacing 51.

FIG. 2 is an explanatory view showing the entire electric circuit structure of the electrode device as the current collecting means and the structure of a part of the mechanical mechanism. In FIG. 2, the rod-shaped electrode 51 has a facing surface area capable of collecting current from the surface of the feeding conductor (third rail) 2 and a lateral width capable of covering rolling in the traveling direction,
51a is a mover core that is attracted to the stator 52a or the stator 52b, 51b is a displacement detection rod that indicates the displacement of the mover core 51a,
51c is an insulating member, and these are integrally formed.
52a and 52b are stators formed by electromagnets fixed to the fixed side in the vehicle, which are vertically arranged via a mover iron core 51a and an air gap, and 53a and 53b support electrodes 51 and displacement detection rods 51b. It is a guide (supporting member) that can slide only in the vertical direction and is fixed to the fixed side with very little friction. The mover iron core 51a, the displacement detection rod 51b, the guide 53a,
53b and the stators 52a and 52b form an actuator that moves the electrode 51 up and down. 54a and 54b are amplifiers that supply current to the stators 52a and 52b, 55 is a compensator (details will be described later), and 58a is a mover core 51 for the stators 52a and 52b.
It is a displacement sensor that detects the position of a. Displacement sensor 58a
And the amplifiers 54a, 54b and the compensator 55 form a driving device for driving the actuator.

58b is a gap sensor for detecting an air gap between the feeding conductor (third rail) 2 and the electrode 51, 55 is a stator 52a, 52b corresponding to a signal from the gap controller 56, and is a movable iron core 51a. Is a compensator for performing a compensating operation so as to generate a supporting force for supporting the magnetic field with the magnetic attraction force. Reference numeral 57 is a comparator for comparing both signals of the gap command value Gs and the detection value of the gap sensor 58b to calculate the gap deviation. Comparator 57 and gap controller
56 and the air gap sensor 58b form an air gap phase control means. Reference numeral 59 is an insulated cable that connects the electrode 51 and a power source (not shown). The compensator 55, which receives a signal from the air gap controller 56 and a signal from the displacement sensor 58a and sends a command to the amplifiers 54a and 54b, uses a magnetic attraction force to move the movable iron core 51.
The supporting force of the stators 52a and 52b supporting a is compensated so as to be proportional to the signal of the controller 56. That is, the amplifier 54a, the stator
52a works to lower the movable iron core 51a by the magnetic attraction force, and the amplifier 54b and the stator 52b work to raise the movable iron core 51a by the magnetic attraction force, but even if one is movably used and the other is used as a bias. good. In such a configuration, the gap sensor 58b compares the detection value obtained by detecting the gap between the conductors (third rail) 2 when the electrode 51 is used with the gap command value Gs, and if there is a difference, the gap controller 56 Work and issue a slide command. The compensator 55 receiving this slide command applies a current to the stators 52a, 52b via the amplifiers 54a, 54b to displace the movable iron core 51a. And the electrode 51
When the gap between the conductors (3rd rail) 2 is the command value Gs
Approaching. Since this operation continues, the air gap is kept constant even when the vehicle 1 travels.

(Embodiment 2) FIG. 3 is an explanatory view of a main portion in which a part of FIG. 2 is modified to have another structure. In FIG. 3, reference numeral 50 denotes a spring mounted between fixed parts [although it may be mounted between the lower end surface of the mover iron core 51a and the fixed part, in which case the stator uses 52a (see FIG. 2)]. The lower side is in contact with the upper end surface of the movable iron core 51a, and the upper side is fixedly attached to a fixed side (not shown) and is mounted in a compressed state, and the movable iron core 51a is always pressed downward. And the movable iron core
The reference numeral 51a is a stopper (not shown) that is displaced (downward) only to a predetermined position. In such a structure, when current is supplied to the stator 52b, the movable core 51
The movable iron core 51a, which is pressed by a spring due to a suction force acting on a, is pulled up. Then, by performing feedback control as in FIG. 2, the air gap is made equal to the command value Cs and is maintained at a constant gap.

(Third Embodiment) FIG. 4 is a block diagram showing a circuit configuration of a third embodiment of the present invention. In FIG. 4, reference numeral 61 denotes a plow conductor (third rail) 2 and an electrode 51 which form an electric line.
A first actuator for varying the air gap between,
62 is a second actuator that mounts [mounts] the first actuator 61 and electrode 51 together to make the air gap variable, 71 is a first drive device that drives the first actuator 61, and 72 is a second drive device. A drive device for the actuator 62, a first gap controller 56a that receives a detection signal from the air gap sensor 58b, performs phase control so that the air gap has a predetermined size, and sends a command to the first drive device 71. 56b receives the detection signal of the air gap sensor 58b and performs phase control so that the air gap has a predetermined size, and the second driving device 72b.
Is a second gap controller that sends commands to the cable 59
The electrode (not shown) connects the electrode 51 (see FIGS. 2 and 3) to the power supply of a train (not shown). All of these are arranged inside the vehicle, and the electrode 51 and the first actuator 61 are electrically insulated. Also, the second actuator
The stroke by which 62 drives the first actuator 61 together with the electrode 51 is larger than the stroke of the first actuator 61 that drives the electrode 51.
The frequency characteristic of the gap control loop including 62 is suppressed to be lower than the frequency characteristic of the gap control loop including the first actuator 61.

In the above structure, when the train runs at high speed, the high-frequency gap fluctuates due to the surface roughness of the feeder (third rail) 2 and the like. On the other hand, although the entire vehicle shakes due to wind pressure fluctuations, fluctuations in the low frequency gap occur due to the large weight of the vehicle.
When the above-described device of the present invention operates in response to these gap fluctuations, a large fluctuation at a low frequency in the relative displacement between the vehicle 1 (electrode 51) and the electric conductor (third rail) 2 causes the second gap control. The small-amplitude, high-frequency vibration is controlled by the control loop including the controller 56a, and is controlled by the control loop including the first gap controller 56a. When there is no wind pressure fluctuation and the relative position fluctuation between the vehicle 1 and the electric conductor (third rail) 2 is small,
The control loop including the second gap controller 56b is hardly activated, and the control loop including the first gap controller 56a is activated to control the gap to be constant.

[0017]

As described above, according to the present invention, the electrode collects current in a non-contact state without making contact with the feeding conductor (third rail), so that the traveling speed is limited by the friction of the collecting portion. Since there is no gap and the gap is kept constant, the air gap in the current collection path is constant and there is no disturbance in the current, enabling stable high-speed traveling, enabling high-speed trains and increasing transport speed. That is an advantageous effect. Furthermore, the gap between the feeding conductor (third rail) and the electrode is double controlled in the control area, so even if the vehicle shakes significantly, the gap is always controlled to be constant, and the effect of non-contact current collection is improved. The maximum effect can be achieved, and a special effect that enables stable high-speed running of the train can be achieved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a main part of a train according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining an electrical circuit configuration representing the entire electrode device as a current collecting means and a configuration of a part of a mechanical mechanism in the first embodiment of the present invention.

FIG. 3 is a diagram for explaining an electrical circuit configuration representing the entire electrode device as a current collector in Embodiment 2 of the present invention and a configuration of a part of a mechanical mechanism.

FIG. 4 is a block diagram showing a circuit configuration according to a third embodiment of the present invention.

[Explanation of symbols]

 1 Vehicle 2 Feeder (3rd rail) 3 Power supply 4 Drive source 5 Electrode device 50 Spring 51 Electrode 51a Mover core 51b Displacement detection rod 51c Insulation member 52a, 52b Stator 53a, 53b Guide 54a, 54b Amplifier 55 Compensator 56 Gap Controller (Phase Controller) 56a First Gap Controller 56b Second Gap Controller 57 Comparator (Gap Deviation Calculation) 58a Displacement Sensor 58b Gap Sensor 59 Insulated Cable 61 First Actuator 62 Second Actuator 71 First drive device 72 Second drive device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yusuke Sato 38-8 Mitsumachi, Kokubunji, Tokyo 38 Inside the Railway Technical Research Institute

Claims (8)

[Claims] 1. A train collection system comprising a power source, a driving source, and an electrode device, wherein the power source collects power from a feeding conductor which is a third rail via the electrode device and supplies electric power to the driving source. In the electric device, an electrode facing the feeding conductor across an air gap provided in the electrode device is made movable with respect to the traveling train car, and a constant air is provided between the feeding conductor and the electrode. A train current collector characterized by collecting and traveling in a gap. 2. An electrode, an actuator that operates the electrode by mounting the electrode via an insulating member, a gap sensor that detects the air gap and sends a gap detection value, and a drive device that drives the actuator. A gap controller that calculates and controls a phase from a gap deviation between the command value of the air gap and the gap detection value; and an insulating cable that connects the electrode and the power supply, and the gap detection value corresponds to the gap detection value. The train current collector according to claim 1, wherein a gap controller operates to give a command from the gap controller to the actuator to drive the actuator to keep the air gap constant. 3. A mover core to which the electrode is fixed, a displacement detection rod fixed to the mover core, a guide for supporting the electrode and the displacement detection rod so as to slide in parallel, and the mover. A stator composed of two electromagnets facing the iron core via a gap, a displacement sensor for detecting the position of the mover iron core with respect to the stator, two amplifiers for supplying a current to the stator, and the command value. And a comparator for deriving a gap deviation between the two by comparing the detection value signals, a control signal from the gap controller and a displacement signal from the displacement sensor, and giving a command to the two amplifiers,
A compensator for compensating the supporting force exerted on the movable iron core by the stator so as to be in a proportional relationship with a command of the controller,
The train current collector according to claim 2, wherein feedback control is performed so that the air gap becomes equal to a command value of the air gap. 4. A compensating signal from the compensator is applied to one of the two amplifiers to lower and raise the electrodes, or both are biased to increase one and decrease the other simultaneously. The train current collector according to claim 3, wherein the electrode is lowered and raised. 5. One of the two stators is replaced by a spring, and the electrodes are constantly pressed in a specific direction.
The train current collector according to claim 3, wherein the other stator generates a force in a direction opposite to the specific direction to hold and control the air gap constant. 6. The first constituent means of the actuator, wherein the electrode has a low frequency characteristic and corresponds to a large displacement with respect to the feeder, and the actuator has a high frequency characteristic and corresponds to a small displacement. 2. The train current collector according to claim 2, further comprising: 7. A first and second actuator as a means for varying the air gap, comprising a first actuator and a second actuator for moving the electrode together, and the first and second actuators. And a first and a second gap controller for feeding back the signal from the gap sensor to control the phase and command the first and second drive devices. The stroke of the electrode of the gap control loop including the first actuator is wider than the stroke of the electrode of the gap control loop including the first actuator, and the frequency band of the gap control loop including the first actuator includes the second actuator. Characterized by being configured to have a higher frequency than the frequency band of the gap control loop The train current collector according to claim 6. 8. The train according to any one of claims 1 to 7, wherein the feeding conductor is formed in a rail shape laid on a fixed portion facing the traveling train. Current collector.