JPS63224602A - Electric railcar with regenerative brake - Google Patents

Abstract

PURPOSE:To operate a regenerative brake effectively even under light load by qualifying the reference value of regenerative annulment in response to order from the lead car of one carriage of electric railcars. CONSTITUTION:The order of each electric railcar or unit is detected by a logical circuit by a straight-pull circuit 21 at every car, and a flag of order of interest is set. A regenerative-annulment reference-value setting circuit 300 sets a reference value corresponding to the flag from a car order detector 10. On the other hand, feeder voltage through a pantograph 60 from a stringing 50 is detected by a stringing voltage detector 40. When feeder voltage is brought to the reference value or more, a comparator 70 annuls a regenerative brake by a regenerative-brake changeover circuit 80. Changeover to another brake from the regenerative brake is conducted simultaneously by a brake controller 90.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electric train with a regenerative brake.

[Conventional technology]

In conventional trains equipped with regenerative brakes, control is performed for each train set to disable the regenerative brakes and switch to air brakes when the overhead line voltage exceeds a certain voltage.

Incidentally, related trains include, for example, Japanese Patent Publication No. 53-22323.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, no consideration is given to control during light load regeneration, and regeneration cannot be performed unless the load exceeds a certain value. For this reason, there is a problem in that the regenerative brake cannot be effectively applied during light loads, resulting in a decrease in regenerative brake efficiency and an increase in operating costs.

An object of the present invention is to provide a regenerative brake-equipped electric train that can improve regenerative braking efficiency and reduce operating costs by making the regenerative braking work effectively even under light loads.

[Means for solving problems]

The above object includes a means for detecting the rank of a train equipped with a regenerative brake relative to the leading car of a train; a means for setting a reference value for regeneration expiration for each detection rank in the vehicle rank detecting means;
means for detecting an overhead line voltage, and comparing the detected overhead line voltage value and the regeneration deactivation reference value, and deactivating the regenerative brake under the condition that the detected overhead line voltage value is larger than the regeneration deactivation reference value, and transfers the regenerative brake from the regenerative brake to another brake. This can be achieved by providing a means for switching.

[For production]

The vehicle rank detection means detects the rank from the leading car of the -m-composed train. The regeneration expiration reference value setting means detects the ranking of 0 and sets a flag for the relevant ranking.The regeneration expiration reference value setting means sets a reference value of regeneration expiration for each detection ranking by the vehicle ranking detection means. Different reference voltages are generated corresponding to the flag positions. The brake switching means compares the overhead line voltage detection value detected by the overhead line voltage detection means with the regeneration expiration reference value set by the regeneration expiration reference value setting means, and determines the condition in which the overhead line voltage detection value is greater than the regeneration expiration reference value. For example, the regenerative brake is disabled and the regenerative brake is switched to another brake.
The voltage corresponding to the overhead line voltage detected by the overhead line voltage detection means is compared with the reference voltage set by the regeneration deactivation reference value setting means, and under the condition that the voltage corresponding to the overhead line voltage is greater than the reference voltage, the regenerative brake disconnect circuit is activated. The regenerative brake is deactivated and the brake control device switches from the regenerative brake to another brake, such as an air brake. In this way, by detecting and assigning a ranking to each electric vehicle or unit, the load is reduced by changing the limit of the overhead wire voltage that can be regenerated, and the number of vehicles regenerated each time the overhead wire voltage increases is reduced.

That is, by switching from the regenerative brake to another brake, the regenerative brake can be effectively applied even under light loads.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, the vehicle rank detection circuit 10, for example, the zero regeneration expiry reference value setting circuit 30, which is electrically connected to the lead-in circuit z1 of each electric vehicle with regenerative brake 20, is connected to the vehicle rank detection circuit 10. electrically connected. The overhead line voltage detection circuit 40 is provided to be able to detect the power supply voltage from the overhead line 50 via the pantograph 60. The comparator 70 has
A regenerative brake disconnection circuit 80 to which the regeneration deactivation reference value setting circuit 30 and the overhead line voltage detection circuit 40 are electrically connected is electrically connected to the comparator 70 and electrically connected to the brake control device 90. It is connected to the.

In Fig. 1, the order of each electric vehicle or unit is detected by the logic circuit of the lead-in circuit 21 for each vehicle, and a flag of the corresponding order is set (the order is 1, 2, etc.).
n) *For example, the 0 regeneration expiration reference value setting circuit 30, which transmits an FM wave from the leading car during passing, modulates the frequency at the corresponding vehicle, and detects the modulated wave with a demosimulator to detect all vehicle positions, is as follows: Based on the flag (rank) from the vehicle ranking detection circuit 10, a corresponding reference value (el 1
e2 -------en) and set the reference value to the comparator 7.
Enter 0.

On the other hand, the power supply voltage from the overhead wire 50 via the pantograph 60 is detected by the overhead wire voltage detection circuit 40, and the power supply voltage is the voltage (El + E2 -----En) (
However, E, + Ez −−−−−−−En are approximately the same voltage), and the converted voltage (E 1 * E2−−
----En) is input to the comparator 70. In the comparator 70, the converted voltage (El*E2 --
−−−− En ) and reference value (e1+ e2 −−−−
-- e n ). As a result of the comparison, if Eα>eα is satisfied, the regenerative brake disconnection circuit 80 disables the regenerative brake, and the brake control device 90 switches the regenerative brake to another brake, for example, an air brake.

In this example, the regenerative brakes are sequentially turned off during light loads when the overhead wire voltage tends to rise during regeneration, and continuous operation is possible when the regenerative power and load are balanced, which improves regenerative braking efficiency and saves energy during operation. Cost can be reduced. Further, by connecting the vehicles, the circuit can be automatically configured, eliminating the hassle of manual settings.

〔Effect of the invention〕

According to the present invention, regenerative braking can be effectively applied even when the load is light, so that regenerative braking efficiency can be improved and operating costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a regeneration control system according to an embodiment of the present invention. 10------One vehicle rank detection circuit, 20---One electric vehicle with regenerative brake, 21---One pull-through circuit,
30---- One-time revocation reference value setting circuit, 40---
--- Overhead line voltage detection circuit, 70 --- - Comparison circuit,
80---Agent Patent Attorney Ogawa Omori Figure

Claims (1)

[Claims] 1. Means for detecting the rank of a train from the leading car, means for setting a reference value for regeneration deactivation for each detection rank by the vehicle rank detecting means, means for detecting overhead line voltage, and overhead line voltage. and means for comparing the detected value with the regeneration deactivation reference value, deactivating the regenerative brake under the condition that the detected overhead wire voltage value is larger than the regeneration deactivation reference value, and switching from the regenerative brake to another brake. A train with regenerative brakes featuring