JPH0217801A - Controller for electric rolling stock - Google Patents

Abstract

PURPOSE:To execute a crew's judgement reacting to regeneration failure without performing operation by temporarily reducing a target speed in an automatic train operating device when the regeneration failure is detected. CONSTITUTION:An AT device sets a target speed lower by approx. 3km/hr than an ATC limiting speed in a setter 22a. On the other hand, a setter 22b sets a target speed corresponding to the maximum designation of a normal ATC signal when there is no regeneration failure signal 41, but reduces the target speed to a safety speed when the signal 41 is input. Lower one of the two targets speeds set by the setters 22a and 22b is elected by a low priority unit 24. A brake command 33 or a power drive command 34 is output in response to a deviation between the target speed and an actual train speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric railway vehicle, and particularly to a speed control device suitable for automatic operation.

[Conventional technology]

In general, electric vehicles used on routes that include long downhill sections often use control devices with regenerative capabilities. This is because if you go down a slope while applying heat, your thermal performance will be insufficient. When going down a hill at high speed, it is necessary to provide part or all of the required braking force to an electric brake such as a regenerative brake.

[Problem to be solved by the invention]

The regenerative braking capacity is designed to provide the necessary braking force. However, in rare cases, a protection function within the control device against overvoltage, overcurrent, etc. of the control device operates due to a disturbance such as overhead line voltage, and as a result, the regenerative brake becomes ineffective. In this case, it becomes necessary to provide all the braking force with the mechanical brake, and if the vehicle continues to operate at high speed, the temperature of the brake shoes etc. may rise abnormally, so it is necessary to keep the operating speed low.

Conventionally, when a driver recognizes that regenerative braking has failed, this problem has been dealt with by intentionally reducing the speed of the vehicle, contrary to the prescribed speed for that section.

However, in vehicles equipped with self-driving devices, the crew is not supposed to operate the vehicle as a general rule.
Furthermore, since the phenomenon of regeneration failure occurs only rarely, even if crew members are expected to take this action, it is difficult to respond quickly.

Furthermore, this is not possible with unmanned trains that do not have crew members.

An object of the present invention is to provide a means for implementing this response without requiring judgment or operation by the crew member.

[Means to solve the problem]

The above purpose is achieved by adding a function that inputs the signal to the automatic train operation system (hereinafter referred to as AT○ device) when regeneration failure is detected, and temporarily lowers the target speed within the automatic train operation system. .

[Effect]

FIG. 2 shows the equipment configuration of an electric vehicle to which the present invention is applied. The ATO device 3 outputs a command to a control device 4 and a brake device 5 based on information from an automatic train control (hereinafter referred to as ATC) device 2. The detailed operation of each device will be explained below.

FIG. 3 shows the configuration around the AT○ device. A.T.
The ATC indication signal 31 in this section is received from the C device 2. The ATO device recognizes the maximum allowable speed in that section from this ATC indication signal, and normally sets a speed slightly lower than that speed as the target speed. On the other hand, the actual train speed 32 is inputted from the speed generator 8, compared with the target speed, and depending on the deviation, a power running command and a brake command are outputted as appropriate to maintain the target speed.

The action of the output brake will be explained with reference to FIG. The brake command 38 is a signal instructing the brake force,
Inputs to control equipment and brake equipment. The control device controls the motor so that an electric braking force corresponding to the braking force is generated. Then, the actually obtained electric braking force is detected and output to the brake device 5. The brake device 5 constantly monitors the difference between the brake command and the electric braking force, and if the electric braking force is less than the brake command, air is supplied to the brake cylinder 6 at a pressure equivalent to obtaining the necessary braking force. It has the effect of sending. As a result, in the unlikely event that regenerative braking fails,
Even if the electric braking force becomes O, the air brake compensates for the shortfall, so the total braking force remains unchanged.

FIG. 5 shows a block diagram of the control device. In this example, the chop section is controlled and the current flowing through the motor is controlled so that the necessary electrical braking force can be obtained for a given brake command. The filter capacitor voltage and armature current are also detected and input to the control section. Specifically, the control of the chopping section and the like is performed by the control section 10. A specific example of the control section is shown in FIG. When a brake command is received, the setting unit 17 generates a pattern current corresponding to the command value, compares it with the actual current, and outputs a chopper duty signal γ from the phase shifter 18 in accordance with the deviation.

In addition to controlling the conductivity of the chop section, the control section 10 also uses a protection detection section 19 to detect whether the filter capacitor voltage and armature current are always within a certain normal range.
If it is determined that there is an abnormality, a command is issued to immediately open the main circuit switch 16. In addition, the regeneration failure detection unit 21 monitors whether a current commensurate with the brake command is flowing, and detects regeneration failure when the current decreases as in the abnormal state described above. That's what I do.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. A.T.
The O device receives the ATC signal and speeds 3k below the ATC speed limit.
A target speed as low as m/h is set in the setting section 22a. On the other hand, the vehicle has a setting section 22b which receives a regeneration deactivation signal 41 from the control device and sets a target speed to a speed that is safe for traveling on a downhill slope using only a predetermined air brake. If there is no regeneration deactivation signal, the setting section 22b sets the normal A.
Although the target speed is set to correspond to the maximum appearance of the TC signal,
When a regeneration invalidation signal is input, the target speed is reduced to a safe speed. Of the two target speeds set by the setting units 22a and 22b, the lower target value is selected by the low priority unit 24, this target value and the actual train speed are compared, and the brake command 33 and the brake command are issued according to the deviation. Line command 34 is output,
The train speed is controlled to the above-mentioned target value.

According to this embodiment, when the electric brake of the control device fails, the train speed is automatically reduced to a speed at which it is safe to operate with only air brakes, without manual intervention by the crew, and thereafter can be controlled to keep it at that speed.

FIG. 7 shows another embodiment. In this embodiment, compared to the above-mentioned embodiments, a timer section 25 is inserted between the setting section 22b that receives the regeneration expiration signal 41 and sets the target speed. This is because even if regeneration lapses in the control device, regeneration may be activated again after a certain period of time.
While regeneration has expired, the air brake will automatically be activated by the mechanism explained in Figure 4, but for a short period of time, even if the entire braking force is covered by the air brake, there will be an adverse thermal effect. I won't give anything. Therefore, the target speed is not reduced for a certain period of time.

A normal state is maintained, and if the first regeneration does not recover after a certain period of time, the target speed is reduced.

According to this embodiment, when the electric brake fails for a short period of time, it is possible to prevent the driving speed from being unnecessarily changed and the riding comfort from being deteriorated.

Note that the regeneration deactivation signal used in the two embodiments described above is provided in the control device, but as shown in Figure 4, the lack of electric braking force can also be determined by the brake device, and a signal is provided in the brake device. It can also have functions.

[Effects of the Invention] According to the present invention, when an electric vehicle is traveling on a downhill slope while applying the electric brake, for some reason,
If the electric brakes fail, the train's speed can be automatically reduced to and maintained at a safe speed without requiring the crew to perform any unsteady operations.

[Brief explanation of drawings]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of train equipment, Fig. 3 is a block diagram of equipment around the ATO device, Fig. 4 is a block diagram related to the brake system, Fig. 5 6 shows a circuit diagram of the chopper control device, FIG. 6 shows an internal block diagram of the control section, and FIG. 7 shows a block diagram of another embodiment of the present invention. 1... Electric car, 2... ATC device, 3... ATO
Device, 4... Control device, 5... Brake device, 6.
...Brake cylinder, 7...Brake shoe, 8.
...Speed generator. Figure Figure Figure 5 Figure Figure Figure 6 Figure 6 1θ

Claims (1)

[Claims] 1. A speed generator that detects the train speed, an automatic train control device that detects the automatic train control signal, which inputs the train speed and the automatic train control signal, and issues a power running command and a brake command. an automatic train driving device that outputs an output; a control device that generates an acceleration force to the electric motor when the power running command is input, and a brake force to the electric motor when the brake command is input; an electric brake device having a function of causing a mechanical brake mechanism to act according to the brake command, and supplementing the applied brake force by the mechanical brake that is insufficient due to the brake force generated by the electric motor; In the vehicle, when the braking force generated by the electric motor is insufficient with respect to the braking force given by the brake command, means for detecting this and inputting this detection signal to the automatic train operation device, An electric vehicle control device comprising means for reducing a target speed within the automatic train operation device to a predetermined speed when an event is detected. 2. Claim 1, wherein the automatic train operation device includes a setting unit that refers to the automatic train control signal input from the automatic train control device and outputs a target speed, and a setting unit that outputs a target speed. A setting section outputs a predetermined low target speed when a shortage is detected, and a low priority section inputs the two target values and selects the lower target speed, and controls the speed to the target speed. An electric vehicle control device comprising an automatic driving device that outputs the brake command and the power running command.