JP2007313956A - Crossing-bar lowering-speed control system and crossing-bar lowering-speed control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crossing-bar lowering-speed control system that adjusts a self-weight lowering speed of a crossing bar during power failure to a fixed speed regardless of a length of the crossing bar. <P>SOLUTION: The crossing-bar lowering-speed control system 1 is composed of a speed control circuit 3 for controlling a rotating speed of a motor 2 related to lowering operation of the crossing bar, a normal power-supply circuit 4 for supplying power to the speed control circuit 3, and a motor power-generation supply circuit 5 for supplying power generated with the motor 2 in the case of power failure by self-weight lowering operation of the crossing bar to the speed control circuit 3. By this way, it is possible to control the lowering speed of the crossing bar during power failure to a desired speed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a descent speed control system and a descent speed control method for a breaker, and particularly to a breaker such as a railroad crossing, by making it possible to adjust the weight lowering speed of the breaker even during a power failure. The present invention relates to a lowering speed control system and a lowering speed control method for a shut-off can that can eliminate the adjustment work and obtain a shut-off effect such as simple, safe and reliable passage.

  A circuit breaker installed at a railroad crossing or the like is conventionally provided with a motor driver for operating lifting and lowering of a barrier for blocking traffic and a mechanical brake for operating the barrier. In the event of a power failure, the circuit breaker needs to lower its weight to the horizontal position in order to ensure the safety of passing vehicles.

  In this case, in order to prevent unexpected accidents such as an impact accident on the vehicle or human body due to the descent speed being excessive, or a collision accident caused by a delay in the traffic blocking action due to being too small Therefore, it is necessary to adjust the lowering speed of the barrier can moderately. For this reason, conventionally, a weight for adjusting the speed is attached to the breaker or a dynamic brake circuit using electric power generated in a motor for lowering the breaker is used to eliminate the need for attaching the weight. Things have been done.

  In addition, technical proposals have been made regarding the lowering of the weight of the breaker at the time of a power failure, etc., and what is shown in the following patent document is an electric breaker that can make the weight lowering characteristic of the breaker different from that at the time of free fall. For the purpose of providing, when the shutoff weight falls to the set position, the movable contact is pushed up by the cam that responds to the shutoff, the short circuit is closed, the DC brushless motor is subjected to dynamic braking, The configuration of becoming smaller is disclosed.

Japanese Patent No. 3355477 “Electric circuit breaker and method of adjusting weight reduction characteristics of shield”

  However, in the conventional circuit breaker configuration, including the above-mentioned patent documents, when the length of the circuit breaker changes, the descending speed due to its own weight at the time of a power failure also changes, so that individual speed adjustment work is required for each circuit breaker or circuit breaker.

  The problem to be solved by the present invention is that, except for the above-mentioned problems of the prior art, in a circuit breaker such as a level crossing, the speed at which the weight of the barrier is lowered is constant even during a power failure, regardless of the length of the barrier. Provided is a barrier can lowering speed control system and a barrier can lower speed control method capable of obtaining a barrier effect such as simple, safe and reliable passage, etc. That is.

  As a result of studying the above problems, the inventor of the present application has found that the above problems can be solved by the configuration in which the electric power generated in the motor that operates the shut-off can be supplied to the speed control circuit. That is, the invention claimed in the present application, or at least the disclosed invention, as means for solving the above-described problems is as follows.

    (1) A system for controlling the lowering speed of the breaker of the circuit breaker during a power failure, the system comprising a speed control circuit for controlling the rotational speed of the motor related to the lowering operation of the breaker, A normal power supply circuit for supplying electric power to the speed control circuit, and a motor power generation and supply circuit for supplying electric power generated by the motor to the speed control circuit by a self-weight lowering operation of the shut-off member during a power failure And a descent speed control system for the shut-off can.

    (2) It is a method that can control the lowering speed of the breaker of the circuit breaker at the time of power failure. When energized, the normal power supply circuit supplies power to the speed control circuit, which will be described later. The electric power generated by the motor interlocked with the dead weight lowering operation of the interrupter is supplied to the speed control circuit, and the speed control circuit receives the electric power and is interlocked with the lowering operation of the interrupter. A method for controlling the lowering speed of the interrupting can, wherein the lowering speed of the interrupting can is controlled by controlling the rotational speed of the motor.

  Since the lowering speed control system and the lowering speed control method of the barrier of the present invention are configured as described above, according to this, in the interrupter such as a level crossing, the power failure occurs regardless of the length of the barrier. Even in such a case, by making it possible to adjust the lowering speed of the weight of the breaking canal to a constant speed, the individual adjustment work of the breaking can be made unnecessary. Further, it is possible to obtain a blocking effect such as simple, safe and reliable traffic.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a circuit diagram showing a configuration of a main part of a lowering speed control system for a breaker according to the present invention. As shown in the figure, the present system 1 is for controlling the lowering speed of the breaker of the breaker during a power failure, and is a speed control circuit for controlling the rotational speed of the motor 2 related to the lowering action of the breaker. 3, a normal power supply circuit 4 for supplying power to the speed control circuit 3 when energized, and power generated by the motor 2 due to its own weight lowering operation during a power failure to the speed control circuit 3 The main configuration is to include a motor power supply circuit 5 for performing the above.

  With this configuration, in the present system 1, when power is supplied, power is supplied to the speed control circuit 3 by the normal power supply circuit 4 (in the “A” direction in the figure), and the speed control circuit 3 performs the lowering operation of the shut-off can. The rotation speed of the motor 2 is controlled, and the lowering speed of the breaker of the breaker is controlled to a desired speed. On the other hand, at the time of a power failure, electric power generated by the motor 2 is supplied to the speed control circuit 3 by the motor power supply circuit 5 due to its own weight lowering operation (in the “B” direction in the figure), Without change, the lowering speed of the breaker of the breaker is controlled to a desired speed.

  By using the speed control circuit, it is possible to make the self-weight lowering speed constant without using an auxiliary mechanism such as a weight. A basic configuration for performing such speed control includes a sensor built in or attached to the motor and a controller (driver) that receives a signal from the sensor and processes the signal. A speed calculation function unit that calculates the rotation speed of the motor based on the received signal, a speed setting function unit for setting the motor rotation speed, and the difference between the calculated speed and the set speed is compared. And a speed control function unit that adjusts the motor current to be zero. As a sensor built in or attached to the motor, a sensor capable of directly or indirectly obtaining the rotational speed of the motor can be used as appropriate. For example, a resolver as an angle detector can be favorably used as a motor sensor according to the system of the present invention.

  With this speed control configuration, a signal is sent from a sensor (such as a resolver) built in the motor to the controller (driver), and the controller calculates the rotation of the motor based on the received signal. The speed is calculated, and the motor current is adjusted so that the calculated speed and the motor rotation speed set in advance by the speed setting function unit are compared by the speed control function unit and the difference is zero. Thus, the rotational speed of the motor is controlled.

  As described above, the control of the shut-off speed performed by the system 1 of the present invention is such that the normal power supply circuit 4 supplies power to the speed control circuit 3 when energized, and the shut-off speed is controlled during a power failure. Electric power generated by the motor 2 interlocked with the own weight lowering operation is supplied to the speed control circuit 3, and the speed control circuit 3 receives the power supply and rotates the rotation speed of the motor 2 interlocked with the lowering operation of the shut-off can. Is to control.

  According to the lowering speed control system and the lowering speed control method of the breaker of the present invention, in the breaker such as a level crossing, the weight lowering speed of the breaker is kept constant even during a power failure regardless of the length of the breaker. By making it possible to adjust the speed, it is possible to eliminate the need for individual adjustment work of the shut-off can. Therefore, the invention has high industrial utility value.

It is a circuit diagram which shows the principal part structure of the descent | fall speed | rate control system of the breaker of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Shut-down speed control system 2 ... Motor 3 ... Speed control circuit 4 ... Normal power supply circuit 5 ... Motor power supply circuit A ... Power supply direction B by normal power supply circuit B ... Power supply direction by motor power supply circuit

Claims (2)

A system for controlling a lowering speed of a breaker of a circuit breaker at the time of a power failure, the system comprising a speed control circuit for controlling a rotation speed of a motor related to a lowering operation of the breaker and an electric power when energized A normal power supply circuit for supplying power to the speed control circuit, and a motor power generation supply circuit for supplying power generated by the motor to the speed control circuit due to the weight lowering operation of the shut-off mechanism during a power failure. A descent speed control system for a shut-off can. It is a method that can control the lowering speed of the breaker of the circuit breaker at the time of a power failure, and when power is supplied, the normal power supply circuit supplies power to the speed control circuit, which will be described later, and at the time of power failure Electric power generated by a motor interlocking with the self-weight descending operation of the can is supplied to the speed control circuit, and the speed control circuit receives the power supply and receives the electric power of the motor interlocked with the descending operation of the shut-off can. A method for controlling the lowering speed of the barrier can, wherein the lowering speed of the barrier is controlled by controlling the rotational speed.

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