JPS5914302A - Idle notch testing circuit for ac electric rolling stock - Google Patents

Abstract

PURPOSE:To enable to safely test a pneumatic idle notch in a vehicle by arranging means for opening a load on each vehicle unit, and providing display lamps which light when all loads are opened on each vehicle and out of the vehicle. CONSTITUTION:A mode changeover switch COS is switched to ''idle notch'' mode in an each unit such as an idle notch test or the like on a vehicle to directly open a power source for a main motor circuit switch LB. When the changeover switches COS of all the units are completely switched, a display lamp SQLP1 of an operation stand lights, and the idle notch test is operated after this light is confirmed. In order to further indicate that the all units are during pneumatic notch testing on the ground, a display lamp SQLP3 installed under a floor of the vehicle is fired. In this manner, a pneumatic idle notch test on the vehicle can be executed with high safety.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an AC electric vehicle in which various tests are conducted in a stationary state (hereinafter, this test is referred to as an "empty notch test") before the AC electric vehicle is taken out of a garage. The present invention relates to an empty notch test circuit, and in particular to technology that takes into consideration the safety aspects of pressurized air notch testing.

[Technical background of the invention]

FIG. 1 shows the configuration of a conventional device.

Figure 1 shows a vehicle with a driver's cab (hereinafter referred to as an "rMC vehicle") and a vehicle without a driver's cab (hereinafter referred to as an "M vehicle") connected as one unit: MC vehicle - M vehicle - MC vehicle. This figure shows an AC electric car with a total of 2 units connected. In the figure, NFB is a power supply switch for the empty notch test. D.C.
GS is a forward/reverse selector switch located in the driver's cab of each MC car, and depending on the direction of travel of the electric car, "C" is the leading car's "forward",
The rear car is switched to "rear" and the middle car is switched to "neutral" (the diagram shows only the contacts on the "front" side, so only the first MC car of the first unit is on, all others are switched on). ). 8QS is an empty notch test command switch installed near the driver's cab, and when performing an empty notch test, this switch SQ8 is pressed from the lead car. S
QR is an empty notch test auxiliary relay that is energized during the empty notch test. When energized, it opens the circuit of the traction motor, cuts off the power to the closing coil of the traction motor circuit breaker LB, and at the same time turns on the indicator light 5QLP2. lights up. This indicator light 5QLP
2 is installed on the car. CS turns on/off circuit LB.
This is a control sequence section that performs off control, and is not directly related to the present invention, so a description thereof will be omitted here.

Next, an example of an empty notch test method for an AC electric vehicle will be explained.

Generally, in an AC electric vehicle, AC voltage (overhead wire voltage) collected from a pantograph is controlled, rectified, and output as DC voltage to control the voltage and pressure of the main motor and start running. In addition to this AC voltage control, a DC voltage controller (referred to as a "brake controller") is installed under the floor in addition to the above-mentioned AC voltage control system to perform stop brake control using an electric brake. ing. Above exchange 1. Generally, it is widely adopted as pressure control.
Assuming that the overhead line voltage is directly phase controlled by a thyristor via the main transformer, in the empty notch test, the AC voltage was applied in a no-load state (with the switch LB turned off and the traction motor circuit open). Now, perform a phase control test. This method is called the pressurized air notch test and is one of the common test methods.

Here, I will briefly explain the necessity of the above-mentioned pressurized air notch test. 〇Before an electric car is taken out of a warehouse (before it is put into service), check the voltage output applied to the main motor (load) to detect abnormalities in advance. There is a need. On the other hand, in a method in which the phase of AC voltage is controlled by a semiconductor, the phase-controlled output cannot be confirmed unless the AC voltage is pressurized. Therefore, it is common practice for AC electric vehicles to perform an upper pressurized air notch test after releasing the load before leaving the vehicle.

When performing the above pressurized nitrogen notch test, if the main motor circuit is not opened before the pressurized nitrogen notch test is performed, the electric vehicle will be started during the test, and the following situations can be expected: Therefore, it is extremely dangerous.

That is, because there are people working near the electric car on the ground to perform the DC voltage control empty notch test, there is a risk that the electric car will suddenly start up and cause an accident resulting in injury or death.

(The contents of the empty notch test performed on the vehicle include a direct current type, pressure-controlled nitrogen notch test, and in order to perform this test, it is necessary to confirm the operation on the ground.) Next Now, the specific operation of the configuration shown in FIG. 1 will be explained.

When the test command switch SQS is pressed in the lead car (MC car) of the first unit, the indicator light SQ LP near the driver's cab turns on.
1 lights up, and at the same time, the auxiliary relay SQR of each car is turned on by pressurizing the lead-in line 50, the main motor circuit breaker LB of each car is turned off, and the indicator light 5QLP2 is turned on. After confirming that the indicator light 5QLP2 of all units is lit, perform the empty notch test operation from the lead car. Indicator light 5
The lighting of the QLPI is an indication that the test command switch SQS has been operated, and is not an indication that all units are in a state where the nitrogen notch test can be reliably performed (LB is off).

[Problems with background technology]

In the above configuration, if the coil of the auxiliary relay SQR of any unit is disconnected, the traction motor circuit breaker LB of that unit will not turn off when the empty notch test command is issued, so the electric vehicle will not start. Become. In order to prevent this, it is necessary to confirm that the indicator lights 5QLP2 of all units are lit. Conventionally, this confirmation required communication using broadcasting equipment, or methods using pre-prepared monitor equipment (a device that allows central control of the operating status of each vehicle's controllers from the driver's cab). However, the former is disadvantageous in terms of safety uncertainty, and the latter is disadvantageous in terms of cost and equipment simplification. Furthermore, since there is no indication signal for people on the ground that a pressurized air notch is in progress, accidents such as electric shock are likely to occur.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an empty notch test circuit for an AC electric vehicle, which makes it possible to conduct a notch test for on-board pressurization with high safety.

[Summary of the invention]

In the present invention, a means for releasing the electric car drive load is disposed on each vehicle unit (9 cars), and an indicator light that lights up when all the loads in the train formation are released by this means is installed on each car. It is also characterized in that it is provided at a predetermined location outside the vehicle.

[Embodiments of the invention]

FIG. 2 shows the configuration of an embodiment of the present invention.

The unit configuration of the AC electric car is the same as that shown in Figure 1 (- In Figure 2, CO8 is a mode changeover switch installed on the car, and there are 3 modes: ``Normal'', ``Empty Notch'', and ``Open'').
It is possible to switch between two modes. In this case, the indicator light 5QL
The PI is installed on top of the vehicle, and the indicator light 5QLP3 is installed under the floor of the vehicle.

The portions of the configuration shown in FIG. 2 other than those described above function in the same manner as in FIG. 1, so their explanation will be omitted.

With this configuration, when performing a notch test, the mode selector switch CO8 on the vehicle of each unit is switched to the "empty notch" mode, the power supply of the main motor circuit switching circuit LB is directly opened, and the power supply of all units is When the changeover of the changeover switch CO8 is completed, the indicator light 5QLPI on the driver's cab is turned on, and after confirming that it is turned on, the empty notch test operation will be performed. Furthermore, for safety on the ground, an indicator light 5QLP3 indicating that all units are undergoing a pressurized air notch test is lit to ensure safety.

The specific operation in this second configuration will be explained.

Forward/reverse selector switch DCGS for the lead car in the 1st unit
is before r, to ``, the same switch DC of the rear car of the second unit
GS is "Later J, all other same switch DCGS are"
It is assumed that the mode has been switched to "neutral". When conducting an empty notch test, the mode selector switch CO8 of the M vehicle of the first unit is switched to the "nitrogen notch" side, and then the same switch COS of the M vehicle of the second unit is switched to the "nitrogen notch" side. When this switching of all units is completed, the indicator lights 5QLPI of all the driver's cabs are lit according to the following route.

2nd unit power supply switch NFB → same forward/reverse selector switch DCGS r rear → line 50- + 2nd unit mode selector switch cos → line 50A → 1st unit mode selector switch cos → line 50 → 1st unit front/ In front of reverse changeover switch DCasr" → line 5Z → indicator light 5QLPI
At the same time, the indicator light 5QLP3 under the floor of each unit vehicle lights up.

On the other hand, by switching the mode selector switch CoS to the "empty notch" side, the power supply that excites the traction motor circuit switching circuit LB is opened, and during the pressurized air notch test, the traction motor is opened and no load is applied. AC voltage control can be performed in this state.

Here, if the mode changeover switch CO8 of any unit is not changed, the driver's cab indicator light 5QL
Since the PI does not light up, it can be determined that the pressurized air notch test operation cannot be performed. At the same time, in this case, the indicator light 5QLP3 will not light up on the ground, so the treatment as a pressurized air notch test will be discontinued.

In this way, the operator's cab (which commands and operates the nitrogen notch test)
In addition to being able to reliably confirm the safety of the iron, it is also possible to display to people under the floor that the pressurized pneumatic notch test is in progress, thereby preventing troubles and other dangers caused by verbal safety confirmation.

This method is inexpensive compared to expensive equipment such as monitor devices, and can achieve its purpose with only indicator lights and switches, so it is very advantageous in terms of economy and reliability.

Also, regarding the disconnection of the indicator light, please refer to the indicator light 5QLPI.

Of course, both 5QLP3 are working on the Philsafe side.

Furthermore, since the forward/reverse selector switch DCG8 is an essential item to be provided in an AC electric unit, there is also the advantage that the above configuration can be easily realized simply by increasing the number of its contacts.

Moreover, if the "open" mode is set in the switching position of the mode selector switch CO8 as described above, each unit can be opened (main motor circuit breaker LB off) by on-board operation even during business hours. This makes it possible for AC electric vehicles to be treated in this way, eliminating the need to install a special switch for this purpose.

In general, in the Konotsuchi test for DC electric vehicles (overhead line voltage is DC), before starting the test, be sure to open the main switch for each unit (when opened, the handle protrudes outside the box), and the main switch for all units. The normal handling procedure is to check that the container is open (that the handle is protruding from the outside of the box).

If the above-mentioned embodiment is applied to this DC electric vehicle, the mode changeover switch CO8 is used as the main switch, and the indicator light 5QLP is used as the main switch.
The difference (more convenient) is that the handles of all units can be confirmed by lighting the indicator light 5QLPI or 5QLP3 of any unit. In other words, it can be said that it is as convenient or more convenient than a DC electric car.

It is desirable to install the above-mentioned under-floor indicator light 5QLP3 near the equipment under the floor, but the east side pair (when an abnormality occurs, it indicates the vehicle in question and is installed on the side of the vehicle body) [Torlock indicator light 5
QLP3 may also be used.

In addition, the present invention can be implemented with various modifications without changing the gist thereof.

〔Effect of the invention〕

According to the present invention, it is possible to provide a notch testing circuit for an AC electric vehicle that enables on-board pressurized air notch testing to be carried out with high safety.

[Brief explanation of the drawing]

FIG. 1 is a schematic circuit diagram showing the configuration of an example of the prior art, and FIG. 2 is a schematic circuit diagram showing the configuration of an embodiment of the present invention. DCGS...forward/reverse selector switch, 5QLPI. 5QLP3... Indicator light, SQR... Empty notch test auxiliary relay, LB... Main motor circuit breaker, CS-°. Control sequence section, NFB...power switch for indicator light,
CO8...mode changeover switch. Applicant's agent: Takehiko Suzue, patent attorney;

Claims (1)

[Claims] In an AC electric car empty notch test circuit for a pressurized butt notch test in which AC voltage output control is tested with the electric car driving load opened while the overhead line voltage remains applied, the means for opening the load is Placed on the vehicle unit,
An empty notch test for an AC electric car characterized in that an indicator light that lights up when all the loads in the train set are released by this means is provided at a predetermined location on each car and outside the car. circuit.