JPH0133383B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention drives an auxiliary air compressor with a storage battery, raises a pantograph with the compressed air obtained thereby, and then drives the main air compressor with an overhead line power source. The present invention relates to an electric railway vehicle to be driven, and particularly to a method of starting an auxiliary air compressor suitable for obtaining stable starting.

[Background of the invention]

When starting an electric vehicle, the conventional method is to drive the auxiliary air compressor, but if the main air compressor is not subsequently driven, the auxiliary air compressor will start and stop repeatedly using its pressure regulator, eliminating the need for electric vehicle storage batteries. It also had the disadvantage of overloading the motor of the auxiliary air compressor, which was designed for short-time ratings, and of raising and lowering the pantograph.

[Purpose of the invention]

The object of the present invention is that once the auxiliary air compressor is driven and the air pressure rises to a predetermined value, and the pressure regulator stops the auxiliary air compressor, from then on, even if the pressure decreases, the pressure regulator will stop the auxiliary air compressor. Even if an attempt is made to drive the auxiliary air compressor, the auxiliary air compressor will not be driven until a driving instruction is given again, thereby preventing over-operation of the auxiliary air compressor.

[Summary of the invention]

The reason why the auxiliary air compressor is repeatedly driven is that the main air compressor, which should continue to be driven, is not driven. Therefore, the present invention provides a method for preventing the auxiliary air compressor from continuously operating when the main air compressor fails. It has a lock circuit added to it.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows an electrical system diagram of this embodiment. When push switch 2 is pressed, relay 4 is energized, and its contact c
Since the relay 5 is closed, the relay 5 is also energized, and the relay 5 is self-maintained by the contact d.

On the other hand, when the electric car is first started, the pressure regulator 12 closes its contacts because there is no air pressure. Therefore, the relay 6 is energized and the contact h is closed, so the relay 5 is energized. The relay 8 is energized via the contact f, and its contact i is opened. Therefore, even if the contact e closes, the solenoid valve 9 is not energized, and the pantograph air supply remains cut off.

(See Figure 2) However, the electromagnetic contactor 10 has contacts f, h and j.
The auxiliary air compressor 11 is activated at the same time as the push switch 2 is pressed in order to be energized through and close its contacts l.

When the air pressure rises to a predetermined pressure, the pressure regulator 12 opens its contacts, so the relay 6 is demagnetized, its contacts h are opened, the relay 8 is demagnetized, and its contacts i are closed, so the solenoid valve 9 is energized, and the pantograph 18 in FIG. is supplied with air from the auxiliary air tank 17 and rises.

On the other hand, contact g is closed and relay 7 is energized, so contact j is opened, electromagnetic contactor 10 is demagnetized and its contact 1 is opened, and auxiliary air compressor 11 is stopped. Furthermore, since relay 7 is energized through contacts f, b, and k, the pressure regulator 12 closes its contacts again due to the drop in air pressure, energizing relay 6, and increasing its contact g.
Even if the relay 7 is opened, the energized state is maintained, and therefore the auxiliary air compressor 11 is not restarted. This state is maintained until the push switch 1 is pressed to energize the relay 3 and its contacts a and b are opened.

FIG. 2 shows an air system diagram of this embodiment, in which a pressure regulator 14 is connected to a discharge port of the main air compressor 13, and this discharge port is connected to a source air tank 16.
Further, this discharge port is connected to a discharge port of the auxiliary air compressor 11 via a check valve 15, and is connected to an auxiliary air tank 17.

If the set pressure of the pressure regulator 12 is lower than the set value of the pressure regulator 14, the pressure regulator 12 will not close its contacts as long as the main air compressor 13 is operating normally, so the auxiliary air compressor Machine 11 is never driven.

However, if the electric circuits for starting the main air compressor 13 and the auxiliary air compressor 11 are made independent and related only to the operation of the respective pressure regulators 14 and 11, as has been conventionally used, the main air compressor If the aircraft 13 malfunctions, the auxiliary air compressor 11 will repeatedly start and stop under the control of its pressure regulator 12, which will not only cause a malfunction but also consume storage batteries unnecessarily, and furthermore, the pantograph will repeatedly rise and fall, causing the take-off and landing lines to fail. This can cause unnecessary arcing.

〔Effect of the invention〕

According to the present invention, once a command to raise the pantograph is issued, the auxiliary air compressor is driven, and when the air pressure reaches a predetermined value and is stopped by the pressure regulator,
The auxiliary air compressor can only be restarted after pressing the push switch, so leaving the auxiliary air compressor running without noticing a malfunction in the main air compressor may cause an error in the auxiliary air compressor. It is possible to prevent operation from occurring and has the effect of preventing the spread of accidents.

[Brief explanation of drawings]

Fig. 1 is an electrical system diagram of one embodiment of the present invention;
The figure shows the air system diagram. 1...Push switch, 2...Push switch, 3...
Relay, 4...Relay, 5...Relay, 6...Relay, 7...Relay, 8...Relay, 9...Solenoid valve, 10...Magnetic contactor, a to l...Contact, 11
...Auxiliary air compressor, 12...Pressure regulator, 13...
Main air compressor, 14...Pressure regulator, 15...Check valve, 16...Main air tank, 17...Auxiliary air tank, 18...Pantograph.

Claims (1)

[Claims] 1. A relay is provided that is driven by the contacts of the pressure regulator of the air compressor, a self-holding relay is connected to this relay so as to be driven by the contacts, and an electromagnetic contactor for starting the air compressor is connected to the contacts. When the air compressor is connected and the pressure regulator reaches a predetermined pressure and is activated, the electric circuit of the air compressor is opened by the electromagnetic contactor, and this state is maintained by the self-holding relay until an unlock signal is issued. How to start the auxiliary air compressor of an electric vehicle.