JPH03150004A - Auxiliary power source unit for current collecting self-traveling truck - Google Patents

Abstract

PURPOSE:To continue reliable power supply to a travel controller until actual stoppage of a truck upon power interruption by opening/closing a switching means for an emergency battery based on a power interruption detection signal. CONSTITUTION:A path switching means 16 comprises a switching transistor Tr and an ON/OFF control circuit 19 to which a power interruption detection signal 14a is provided, as an ON signal, from a power interruption detecting means 14 upon power interruption. The power interruption detection signal 14a is then provided to a travel controller 12 which continues operation regardless of the power interruption detection signal. On the other hand, a timer 20 is started by the power interruption detection signal 14a and power supply from an emergency battery 15 to the travel controller 12 is interrupted upon elapse of a set time. By such arrangement, safety is enhanced.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a current collector that performs running control based on a control signal given through a receiving means such as a code reader at a fixed position on a running route. This relates to self-propelled trolleys.

(Prior art and its problems) As shown in Figure 1, a general current collector type self-propelled trolley l has:
A collector 4 slidingly contacts a power supply rail 3 constructed along the running route 2, an AC/DC converter 5 connected to the collector 4, and an AC/DC converter 5 connected to the collector 4 via a motor controller 6 such as an inverter. A motor 7 with a brake for driving wheels, a code reader 9 that reads a code plate 8 installed at a fixed position on the traveling route 2 side, and a microcomputer that controls the motor controller 6 based on a control signal 9a from the code reader 9. -IO etc. are provided. Reference numeral 11 denotes a driving wheel driven by the brake-equipped motor.

In the current collector type self-propelled trolley l as described above, if a power outage occurs while the vehicle is running, the power supply to the travel control device 12 and the motor, which are comprised of the code reader 9, microcomputer 10, etc., is cut off. As soon as the driving of the driving wheel 11 is released, the brake attached to the motor wheel applies braking to the driving wheel 11, but the trolley 1 does not stop at the same time as the power supply to the travel control device 12 and the motor wheel is cut off. , the bogie l coasts for several seconds until the brakes are fully applied. On the other hand, since the microcomputer 10 constituting the driving control device 12 is generally equipped with a memory backup battery in the event of a power outage, the driving conditions immediately before the power outage are retained in memory even during the power outage, and therefore the driving conditions are retained during the power outage. At the time of recovery,
Travel drive based on the travel conditions immediately before the power outage will be started. That is, if the latest control signal 9a read by the code reader 9 from the code board 8 on the driving route side before the power outage is, for example, a high-speed driving command, the power failure will occur and the power will stop while driving at high speed, so even after the power is restored, the control signal 9a will be stopped. You will start driving at high speed.

However, while the trolley l is coasting for a distance with the power supply to the travel control device 12 cut off,
For example, when the code reader 9 passes a position where the code plate 8 for low-speed driving command is installed, the code reader 9
Since the power supply to the travel control device 12 including the power supply is cut off at the same time as the power failure occurs, the code plate 8 is not read by the code reader 9. That is, since the control signal 9a for the low-speed running command is not input, the memory of the microcomputer 10 continues to store the high-speed running command immediately before the power outage. If the power outage is restored in such a situation, the vehicle will start driving at high speed, which was the driving condition immediately before the power outage, even though it should have started driving at low speed, and the vehicle will not be able to control the driving as expected. is no longer carried out,
In some cases, it may cause a major accident.

In order to solve the above problems, it has been considered to install a backup battery to supply power to the driving control device 12 in the event of a power outage. Since the battery was controlled to be switched automatically and disconnected when the power was restored, it was necessary to install a large-capacity battery to withstand continuous power supply for a long time.

(Means for Solving the Problems) In order to solve the conventional problems as described above, the present invention has the following features:
In a current collecting type self-propelled trolley which performs traveling control based on a control signal given through a receiving means such as a code reader at a fixed position on a traveling route, the power collecting type self-propelled trolley is connected to the collector and the receiving means is connected to the receiving means. A travel control device including a power supply battery is connected to a power supply battery during a power outage via an electric circuit opening/closing means, and the electric circuit opening/closing means is closed based on a power failure detection signal from a power failure detection means, and after a set time has elapsed, the electric circuit opening/closing means The present invention proposes an auxiliary power supply device for a current collector type self-propelled trolley configured to achieve the following.

(Embodiment) An embodiment of the present invention will be described below based on FIG. An auxiliary power supply device 13 according to the present invention is interposed.

This auxiliary power supply device 13 includes power failure detection means 14 and A
The AC/DC converter 5 is equipped with a power supply battery 15 connected in parallel to the output side of the C/DC converter 5, and a circuit opening/closing means 16 for connecting the battery 15 to the travel control device 12. A circuit 17 for supplying an output to the traveling control device 12 via a diode DI is also provided. 18 is a charging circuit for the battery 15.

The electric circuit opening/closing means 16 is composed of a switching transistor Tr and an on/off control circuit I9 for the switching transistor Tr. A time-up signal 20a from a timer 20 built into the travel control device 12 is input as an off signal. The timer 20 can be configured, for example, by using the clock function of the microcomputer 10 constituting the travel control device 12, and starts timing in response to a power outage detection signal 14a from the power outage detection means 14.

According to the auxiliary power supply device 13 configured as described above, normally, an AC voltage applied from the power supply rail 3 via the current collector 4 is converted to a DC voltage by the AC/DC converter 5, and this is converted into a DC voltage by the diode DI. is supplied to the travel control device 12 from a circuit 17 including the following. When a power outage occurs, the power supply from the power supply rail 3 to the traveling control device 12 is cut off, but a power outage detection signal 14a is output from the power outage detection means 14, and this power outage detection signal 14a causes the on/off control circuit of the electric circuit opening/closing means 16 to be activated. 19 makes the switching transistor Tr conductive, so the battery 1 for power supply during power outage
5 is applied to the travel control device 12 via the switching transistor Tr, and the travel control device 12
operates continuously in the same way as when it was being supplied with power from the power supply rail 3 without stopping. On the other hand, the timer 20 starts measuring time in response to the power outage detection signal 14a, and when the set time has elapsed, the time-up signal 20a output from the timer 20 causes the on/off control circuit 19 of the electrical circuit opening/closing means 16 to switch to the switching transistor T.
Since r is returned to the non-conductive state, the power supply from the power supply battery 15 to the travel control device 12 during a power outage is cut off.

Therefore, by setting the time in the timer 20 to be a little longer than the coasting time from when the power supply to the motor is cut off until the trolley I completely stops, for example, about 5 seconds, it is possible to set the timer 20 to be approximately 5 seconds. Even if the code reader 9 passes the position of the code plate 8 while traveling for a distance due to inertia after the occurrence of the occurrence, the battery 15 is not in the traveling control device 12 including the code reader 9 during this inertia traveling. Since the code reader 9 is supplied with power, the code plate 8 can be read without any trouble, and the code plate 8, for example, receives a low-speed driving command without fail and stores it in the memory of the microcomputer 10. I can do it. As a result, when the power outage is restored, the motor controller 6
is controlled, and the bogie l starts running at low speed (Operations and Effects of the Invention) As described above, according to the auxiliary power supply device for a current collector type self-propelled bogie of the present invention, the power supply device connected to the collector and the cord A travel control device including a receiving means such as a reader is connected to a power supply battery during a power outage via an electric circuit opening/closing means, and the electric circuit opening/closing means is closed based on a power failure detection signal from a power failure detection means, and the circuit is closed for a set period of time. Since the electric circuit opening/closing means is configured to open after a power outage has elapsed, the set time is set to be slightly longer than the coasting time from the time when the power supply from the power supply rail is cut off due to a power outage until the bogie completely stops. (In some cases, even if the power supply from the power supply rail is cut off due to a power outage,
Power can be reliably supplied to the travel control device from the battery until the truck comes to a complete stop.

Therefore, even in a situation where the receiving means passes through the control signal transmission position on the travel route side (the code board installation position in the embodiment) from the time the power outage occurs until the trolley completely stops, The control signal from the control signal transmission position can be received by the receiving means on the bogie side and taken into the travel control device. Therefore, after the power outage is restored, travel control can be started based on the travel conditions at the position where the bogie has come to a complete stop, rather than the travel conditions immediately before the power outage, and safety can be improved.

Moreover, the battery for power supply during a power outage only needs to be capable of supplying power to the travel control device for a period slightly longer than the coasting time until the bogie comes to a complete stop after a power outage occurs, in other words, for an extremely short period of time. There is no need to prepare a large-capacity battery that can continuously supply power for an unpredictable long period of time until the power outage recovers. Therefore, it is economical and convenient for making the truck small and lightweight.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating the configuration of a general current collector type self-propelled trolley, and FIG. 2 is a block diagram illustrating the configuration of a power supply device according to an embodiment of the present invention. l-... Current collector type self-propelled trolley, 2... Travel route, 3...
Power supply rail, 4... Current collector, 5-... A C/D C
Converter, 6...Motor controller, Fu...Motor with brake for wheel drive, 8...Code board, 9...-Code reader, 10--Microcomputer, 11...-Drive wheel, 12- ...Travel control device, 13...Auxiliary power supply device, 14--Power failure detection means, 15--Battery for power supply during power outage, 16--Electric circuit opening/closing means, 19--On/off control circuit, Tr.・・・
switching transistor.

Claims (1)

[Claims] In a current collecting type self-propelled trolley which performs traveling control based on a control signal given through a receiving means such as a code reader at a fixed position on a traveling route, the power collecting type self-propelled trolley is connected to the collector and the receiving means is connected to the receiving means. A travel control device including a power supply battery is connected to a power supply battery during a power outage via an electric circuit opening/closing means, and the electric circuit opening/closing means is closed based on a power failure detection signal from a power failure detection means, and after a set time has elapsed, the electric circuit opening/closing means An auxiliary power supply device for a current collecting type self-propelled trolley, which is configured to open the following.