JPS5826817Y2 - Regenerative load device for vehicles - Google Patents

Description

[Detailed explanation of the invention] This invention prevents the regeneration car from losing its regeneration by connecting a resistor installed on the ground to the overhead wire when the regenerative load decreases while power is being regenerated from the regeneration car. The present invention relates to a regenerative load device for a vehicle.

Figure 1 shows the schematic configuration of a conventional regenerative load device for vehicles, where 1 is a substation, 2 is a transformer, 3 is a full-wave rectifier circuit, and 4 is a substation.
is a regenerative load resistor, 5 is a chopper device for controlling regenerative current, and 6 is a chopper device for controlling regenerative current.
is a voltage detector (DCPT) that detects overhead line voltage, 7 (/
i is a resistor connected in series to this voltage detector 6, 8 is a pantograph, 9 is a regenerative wheel, and 10V'i overhead wire.

The regeneration system may be an armature chopper, a field chopper, or a separately excited control system using a motor generator as a power source, and is simply illustrated as a regeneration vehicle here.

During regeneration, power is sent from the regenerative vehicle 9 in regenerative operation to another vehicle in power running through the overhead wire 10, and regenerative braking is performed in the regenerative vehicle 9.

In this case, if the other vehicle in power running turns off or reaches high speed and the current decreases, the regenerative wheel 9/
The li regeneration is disabled, and this state appears as a voltage increase on the overhead wire 10 as a decrease in the regenerative load.

When this is detected by the voltage detector 6, the chopper device 5 operates and the regenerative load resistor 4 is connected in parallel with the regenerative wheel 9.
Regeneration failure is prevented.

In this case, if there is a change in the command value of the regenerative braking force, the chopper device 50 conductivity control is performed so that the voltage of the overhead wire 10 becomes a voltage slightly higher than the output voltage of the substation when no load is applied.

In this way, when the regenerative power cannot be consumed by other vehicles, the chopper device 5 connected in series with the regenerative load resistor 4 is controlled to continue regenerative operation, but if the other vehicles are When it is in the off state, there is no load other than the regenerative load resistor 4, and a surge occurs every time the chopper device 5 chops.

For this reason, although not shown, the configuration shown in FIG. 1 requires a filter device for absorbing surges, which complicates the configuration.

This idea was made in view of the above points, and a switch that is turned ON when the regenerative load decreases is connected in series with the regenerative load resistor, and a button is connected in parallel with the second part of the regenerative load resistor for regenerative current control. An object of the present invention is to provide a regenerative load device for a vehicle that can control regenerative current without generating a surge by connecting a chopper device.

This invention will be explained below based on the illustrated embodiments.

FIG. 2 shows an embodiment of this invention, which differs from FIG. 1 in that a chopper device 5 for controlling regenerative current is connected in parallel with a part of the regenerative load resistor 4', and a resistor 4 serving as a regenerative load, 4′
The difference is that a thyristor switch 11 is connected in series with the thyristor switch 11.

The thyristor switch 11 is turned on when the voltage detector 6 detects that the voltage of the overhead wire 10 has increased due to a decrease in the regenerative load (other vehicle), and is turned off when the regenerative load (other vehicle) is restored and the voltage decreases. controlled as follows.

Further, the chopper device 5 is controlled to maintain the voltage of the overhead wire 10 at a constant voltage slightly higher than the no-load voltage of the substation.

According to the above configuration, since the thyristor switch 11 is always on during the conduction rate control of the chopper device 5, the regenerative load does not completely disappear, and the generation of surges is prevented.

Therefore, a surge voltage is not applied to each device connected to the overhead wire 10, and a surge absorption filter, which is conventionally required, becomes unnecessary.

FIG. 3 shows another embodiment of this invention, in which a thyristor 12 is used in place of the thyristor switch 11 that is pressed in the above embodiment (FIG. 1), and the resistor 4 and the thyristor 12 are connected in parallel for regenerative current control. A chopper device 5 is connected.

The thyristor 12 (ri) is turned on when the detector 6 detects that the voltage of the overhead wire 10 has increased due to a decrease in the regenerative load (other vehicle), and when the voltage has decreased, the gate signal disappears before the chopper device 5 is turned off. controlled to do so.

Note that the overhead line voltage is controlled by the chopper device 5 in the same manner as described above.

In such a configuration, while the regenerative load is insufficient, the thyristor 12 is turned on and the resistors 4 and 4/ are used as the regenerative load, and the chopper device 5 controls the overhead wire voltage.

Further, when the regenerative load is restored and turned off, the gate signal of the thyristor 12 disappears while the chopper device 5 is on, and the chopper device 5 is turned off when it is turned on.

After this, the chopper device 5 is turned off and the resistance 4°4' is turned off from the overhead line 1.
Detached from 0.

In other words, the thyristor 12, which connects the resistors 4 and 4' to the overhead wire 10 during the shortage of regenerative load, does not require a commutation circuit, and can be made smaller and smaller.
Lower prices can be achieved.

As described above, according to this invention, it is possible to prevent the generation of surges during regenerative current control by the chopper device, so a filter device is unnecessary and the configuration can be simplified.

[Brief explanation of the drawing]

Figure 1 is a circuit configuration diagram showing a conventional regenerative load device for a vehicle.
FIG. 2 is a circuit diagram showing one embodiment of this invention, and FIG. 3 is a circuit diagram showing another embodiment of this invention. 1... substation, 2... transformer, 3...
...Full wave rectifier circuit, 4,4'...Regenerative load resistance, 5...Chopper device, 6...Voltage detector, 7...・Resistance, 8... Pantograph, 9... Regeneration vehicle, 10... Overhead wire. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (2)

[Scope of utility model registration request] (1) When the regenerative load decreases, a regenerative load resistor installed on the ground is connected in parallel with the regenerative vehicle, and a switch that conducts when the regenerative load decreases is connected in series with the regenerative load resistor. A regenerative load device for a vehicle, characterized in that the chopper device is connected in parallel with a part of the regenerative load resistor by pressing a button on the regenerative load device for a vehicle that controls regenerative current. (2) The switch is constituted by a thyristor, connected in parallel to the chopper device together with a part of the circuit load resistance forming a series body, turned ON when the regenerative load decreases, and turned OFF before the chopper device when the regenerative load is restored. Utility model registration claim No. (1) characterized in that it is made to operate
A regenerative load device for a vehicle as described in .