JP2006335289A - Power supply method and apparatus for electric drive vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for supplying electric power to a train without contact at low cost.
SOLUTION: A transformer / linear motor device 3 having both a transformer function and a linear motor function, an inverter 4 for operation control, charging in a section where power can be supplied, and a linear motor function or motor in a section where power cannot be supplied. A battery 5 is provided for driving and driving the vehicle. When the vehicle is stopped, power is supplied from the track side and power is supplied to the vehicle and the in-vehicle power supply is charged. During traveling, the section where power can be supplied from the track performs traveling using the linear motor function, power supply to the vehicle, and charging of the in-vehicle power supply. Power supply from the track is impossible, and the secondary conductor plate laying section to the track side is driven by the linear motor function and supplied to the vehicle by power supply from the on-board power source, and the secondary conductor plate is laid In a section where no power is supplied, the vehicle is driven by a motor and supplied with electric power from the on-vehicle power source.
[Effect] The amount of battery mounted on the vehicle can be reduced, and the ground equipment can be simplified.
[Selection] Figure 2

Description

  The present invention relates to a method for supplying power to an electric drive vehicle in a non-contact manner without using a trolley wire in an electric drive vehicle driven by electricity, and an apparatus for carrying out this method.

Hereinafter, the railway vehicle will be described.
At present, electric railway vehicles (hereinafter abbreviated as trains), which are considered to be environmentally friendly, are generally used. However, power supply to trains is generally performed by contact power supply using a pantograph from a trolley wire. is there. Also, from the viewpoint of effective use of thermal energy, regenerative braking is adopted for railway vehicles.
JP-A-7-322407 JP 2000-83302 A

There is also a system in which a power supply coil is arranged in all sections on the ground, power is supplied in a non-contact manner, and a linear motor is driven.
JP 2002-238109 A

  However, the method of contact power feeding using a pantograph from the trolley wire has problems in terms of maintenance and city aesthetics. Further, in a train that employs a regenerative brake, it is difficult to process regenerative power by braking, and it is difficult to further save energy.

  Moreover, although the system which arrange | positions a power supply coil to all the sections on the ground is excellent in the point of maintenance and the aesthetics of a city, there exists a problem that an installation cost increases.

  An induction current collection method using high frequency is also conceivable, but this method has poor efficiency and power factor, and is not suitable for a current technology that requires a relatively large power supply such as a train. In addition, although a battery drive system or a method of generating power in the vehicle is conceivable, a large amount of battery or power generation device is required, which increases the weight and volume and is difficult to realize.

  The problem to be solved by the present invention is that the conventional power supply system for trains has problems in terms of maintenance, aesthetics, and facility costs, and further energy saving is difficult.

Therefore, the method for supplying power to the train of the present invention is as follows.
To supply electricity to the train in a non-contact manner without using a trolley wire and without arranging a power supply coil in all sections on the ground,
When stopping in a section where power can be supplied from the track, power is supplied from the track side, and power is supplied to the vehicle and the in-vehicle power supply is charged by the transformer function.
When traveling,
In sections where electric power can be supplied from the track, in addition to running with the linear motor function, power supply to the vehicle and charging of the in-vehicle power supply
In addition, in the section where the power supply from the track is impossible but the secondary conductor plate is laid on the track side, the power supply from the on-board power supply allows the running by the linear motor function and the power supply to the on-vehicle,
In sections where power supply from the track is not possible and no secondary conductor plate is laid on the track side, running by motor drive and power supply to the vehicle should be performed by supplying power from the on-board power source. The most important feature.

The power feeding method according to the present invention includes:
A transformer / linear motor device having both a non-contact power supply and charging transformer function for supplying electricity to the vehicle in a non-contact manner, and a linear motor function for train acceleration / deceleration propulsion,
In order to control the operation of this transformer and linear motor device, an inverter installed in an electrically driven vehicle,
In order to supply power to the vehicle and to drive in the section that is controlled by this inverter and can be supplied with power from the track, and in the section where power supply from the track is not possible, use linear motor function or motor drive. It can be implemented by using the power feeding device of the present invention provided with a DC power source installed in an electrically driven vehicle.

  In the present invention, there is an advantage that electricity can be supplied to the train in a non-contact manner without providing a trolley wire that impairs aesthetics and without arranging a power supply coil in all sections on the ground. That is, since the laying section of the power supply coil can supply power via the power supply coil, the amount of battery mounted on the vehicle can be reduced and the vehicle weight can be reduced compared to the case where the entire section is battery-driven. Reduces labor and costs for replacement and maintenance. In addition, ground facilities can be simplified, and the loss of road flexibility can be avoided.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
The power supply device for a train of the present invention is a device that has both a non-contact power supply / charging transformer function for supplying electricity to a vehicle in a non-contact manner and a linear motor function for train acceleration / deceleration propulsion. It comprises a side equipment 1 and a track side equipment 2.

  As shown in FIG. 1, the basic configuration is a control and linear motor device 3 (hereinafter also referred to as a linear transformer 3 or a linear motor device 3) and a vehicle-side winding 3a. It comprises an inverter 4 and a battery or capacitor (hereinafter simply referred to as a battery) 5 as its DC power source. The track-side winding 3b is connected to a commercial power source 7, and its operation control is performed by the inverter 4 connected to the vehicle-side winding 3a.

  In the present invention having such a configuration, in the section where the power line coil (track side winding 3b) is laid on the track side, as shown in FIG. 2B, the linear motor is driven by being supplied with power P1 from the track side. Travel by the device 3.

  The power Pm required for traveling in this case is Fx for thrust, v (= (1-s) vs. traveling speed, where s is a slip value defined in the induction machine, and vs is the speed of the moving magnetic field. ), V · Fx = (1-s) P1. Therefore, surplus power P2 (= P1-Pm = s · P1) is supplied to the vehicle and used for supplying in-vehicle power and charging the battery 5.

  On the other hand, although the power line coil (track side winding 3b) is not laid on the track side, in the section where the secondary conductor plate 9 is laid, the linear motor device 3 is driven by being supplied with power from the battery 5. Travel without contact (FIG. 2 (c)).

  In addition, the power line coil and the secondary conductor plate are not laid on the track side, and the frictional force at the wheel W by the wheel driving motor 6 driven by the battery 5 in a section where the normal road or rail 10 is laid. It travels by driving (FIG. 2 (d)). When driving the frictional force, a motor 6 may be driven by providing a separate dedicated inverter 8 as shown in FIG.

  When stopping at a place where a power line coil is laid on the track side, such as at a station, as shown in FIG. 2 (a), the power P1 supplied from the track side is used by the transformer 3 to Power supply P2 (≈P1), that is, in-vehicle power supply and battery 5 charging.

For example, one of the following two systems is adopted as the transformer / linear motor device 3 that performs such an operation.
(Method 1)
The structure is the same as that of a normal wire-wound linear induction motor, with a primary side and a secondary side having three-phase windings 3a and 3b on the track side and the vehicle side, respectively. A three-phase commercial power supply 7 is connected to the track side.

  And in the transformer driving | operation which charges at the time of a stop, electric power is transmitted to the vehicle side coil | winding 3a from the three-phase commercial power source 7 via an air gap using a moving magnetic field. In this case, since a thrust is generally generated, a fixing mechanism that prevents the vehicle from moving is used in combination.

  In the acceleration / deceleration operation, when the frequency of the current flowing through the track side winding 3b is f1, and the frequency of the current flowing through the vehicle side winding 3a is f2, the control is performed so that f2 = sf1, and the starting acceleration is f2. = Decrease from f1.

  In addition, as described above, the electric power of s · P1 generated at the time of acceleration / deceleration is also used for charging the battery 5 on the vehicle and supplying electric power in the vehicle as described above.

(Method 2)
As shown in FIGS. 3 and 4, the track-side winding 3b has a single-phase winding, and the vehicle-side winding 3a has a winding configuration capable of switching between single-phase and two-phase. The switching is performed by the inverter 4 connected for winding current control without using a switch or the like.

  The track-side winding 3b is an inexpensive concentrated winding single-phase winding and is supplied from a commercial power source. Further, the inverter 4 has a form in which two single-phase inverters are coupled as shown in FIGS. 3 (e) and 4 (e).

  In the transformer operation for charging when the vehicle is stopped, the inverter 4 switches the secondary vehicle-side winding 3a to a single-phase winding as shown in FIG. Electric power is supplied to the vehicle without generating any problems.

  In addition, in the acceleration / deceleration operation, the inverter 4 switches the vehicle-side winding 3a to a two-phase winding as shown in FIG. 4, and a four-phase current (phase shown in FIG. 4 (d)) is applied to generate a thrust by the moving magnetic field. The method for controlling the frequency of the current flowing through the vehicle-side winding 3a is performed in the same manner as the acceleration / deceleration operation of the method 1.

The above is the electric power feeding method for the train of the present invention.
According to the present invention, the train drive power is supplied by the inductive power supply method in the section where the track-side winding 3b is laid, and is supplied from the battery 5 on the vehicle in the other sections. Can be eliminated.

  That is, the present invention is a hybrid drive system that is combined with a ground primary type linear motor and an on-vehicle primary type linear motor, or a rotary type motor, so that the economics of the track facility 2 can be improved and the flexibility of the road is lost as much as possible. In addition, power supply that is safe and does not impair the beauty can be realized.

  Further, in the present invention, in the laying section of the track side winding 3b, the linear motor device 3 is accelerated by the electric power supplied from the track side. Therefore, from the battery 5 during acceleration, which accounts for a large proportion of power consumption during operation. There is no need to supply power. Therefore, the heat storage energy to be loaded on the train can be greatly reduced. On steep slopes, the track-side winding 3b is laid, so that it is possible to travel on a steep slope without consuming power on the vehicle.

  Furthermore, since it is possible to safely supply electric power and charge the battery in a contactless manner while stopping at a station or the like, there is no need to provide a special place or facility for charging. Further, in the present invention, the battery 5 is not discharged (consumed) in the acceleration section, and power supply / charging can be performed conversely.

  Moreover, in the drive section by the linear motor device 3, the linear motor device 3 can be used as a travel guide facility, and automatic operation without consuming the battery 5 is possible, so that it is easy to adapt to ITS (Intelligent Transport Systems).

  In the present invention, when importance is attached to the efficiency, the section for supplying the current of the track side winding 3b may be minimized, and the section may be switched to supply the current according to the movement of the vehicle.

  The embodiments of the present invention have been described above, but the present invention is not limited to these exemplifications, and it goes without saying that the embodiments can be appropriately changed within the scope of the technical idea shown in the claims.

  The present invention described above can be applied not only to trains but also to vehicles such as buses. In this case, the use of a flat linear motor and small-diameter wheels facilitates the realization of a low-floor bus that is safe and friendly to humans.

It is the schematic which showed the basic composition of the electric power feeder to the train of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram for explaining the operation principle of the present invention. (D) is a figure which shows the time of driving | running | working by the motor drive by an on-vehicle power source at the time of driving | running | working. It is explanatory drawing in the case of making a single phase transformer operation | movement by the 2nd system of a transformer and a linear motor apparatus, (a) is a track side winding, (b) is a phase relationship of a track side winding, (c ) Is a vehicle side winding, (d) is a phase relationship of the vehicle side winding, and (e) is a diagram showing an inverter circuit. It is explanatory drawing in the case of performing the linear motor operation | movement similar to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle side equipment 2 Track side equipment 3 Transformer and linear motor apparatus 3a Vehicle side winding 3b Track side winding 4 Inverter 5 Battery 6 Motor 7 Commercial power supply 9 Secondary conductor plate

Claims (2)

A power supply method for supplying electricity to an electric drive vehicle without contact,
When stopping in a section where power can be supplied from the track, power is supplied from the track side, and power is supplied to the vehicle and the in-vehicle power supply is charged by the transformer function.
When traveling,
In sections where electric power can be supplied from the track, in addition to running with the linear motor function, power supply to the vehicle and charging of the in-vehicle power supply
In addition, in the section where the power supply from the track is impossible but the secondary conductor plate is laid on the track side, the power supply from the on-board power supply allows the running by the linear motor function and the power supply to the on-vehicle,
In sections where power supply from the track is not possible and no secondary conductor plate is laid on the track side, running by motor drive and power supply to the vehicle should be performed by supplying power from the on-board power source. A method for supplying power to an electrically driven vehicle. An apparatus for carrying out the method for supplying power to the electrically driven vehicle according to claim 1,
A transformer / linear motor device having both a non-contact power supply and charging transformer function for supplying electricity to the vehicle in a non-contact manner, and a linear motor function for train acceleration / deceleration propulsion,
In order to control the operation of this transformer and linear motor device, an inverter installed in an electrically driven vehicle,
In order to supply power to the vehicle and to drive in the section that is controlled by this inverter and can be supplied with power from the track, and in the section where power supply from the track is not possible, use linear motor function or motor drive. A power supply device for an electric drive vehicle, comprising a DC power supply installed in the electric drive vehicle.

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