JP2013039996A - Elevator control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator control device capable of performing a rescue operation of a car to the nearest floor while suppressing power consumption of an emergency battery power supply during power failure.SOLUTION: This elevator control device comprises a motor winding short-circuiting means 13 for short-circuiting a winding of a permanent magnet motor 4. During power failure, only when a load of a car 8 calculated by a load calculation part 11 is ≥40% and ≤60%, a control part 1 performs control processing for actuating the motor winding short-circuiting means 13 so that the winding of the permanent magnet motor 4 is short-circuited, opening the electromagnetic brake 6, detecting an operation direction of the car 8, thereafter actuating the motor winding short-circuiting means 13 so that the short circuit of the winding of the permanent magnet motor 4 is opened, and driving the permanent magnet motor 4 so that it is in the operation direction detected by the operation direction detecting means 14 of the car 8 in this state.

Description

  The present invention relates to an elevator control device that allows a car to be rescued to the nearest floor with an emergency battery power source in the event of a power failure.

  There exist some which are shown by patent documents 1, 2 as this kind of prior art. The prior art disclosed in Patent Document 1 has a configuration in which a car is operated by an emergency battery power source in a light load direction detected by a load detector during a power failure.

  The prior art disclosed in Patent Document 2 detects the unbalanced load by temporarily opening the electromagnetic brake closed by a power failure, and rotates the traction motor that drives the traction machine and the traction motor that drives the traction machine. The direction is detected, and the traction motor is driven in the direction opposite to the detected rotation direction, thereby stopping the rotation of the traction machine, then closing the electromagnetic brake again, and then opening the electromagnetic brake again to It is configured to restart in the light load direction and rescue the car to the nearest floor.

Japanese Patent Publication No.59-116360 JP 2000-38265 A

  The prior art disclosed in Patent Document 1 described above has a concern that when the car and the counterweight are near the equilibrium state at the time of a power failure, there is a concern of driving in the heavy load direction due to the error of the detection device that detects the unbalanced load. It is necessary to secure a battery capacity corresponding to the error. Therefore, there is a problem that the battery capacity must be increased.

  In the prior art disclosed in Patent Document 2 described above, it is necessary to secure a large current in order to control the electromagnetic brake to open-close-open at the time of a power failure. Has a problem that the battery capacity must be increased because it is necessary to secure a large current for applying the torque for rotating in the reverse direction.

  The present invention has been made from the above-described prior art, and its purpose is to provide an elevator control device that can rescue a car to the nearest floor while suppressing the power consumption of an emergency battery power supply during a power failure. It is to provide.

  In order to achieve the above object, an elevator control apparatus according to the present invention includes a load calculation unit that calculates a load on a car, a driving direction detection unit that detects a driving direction of the car, and a traction machine that raises and lowers the car. A brake release means for releasing an electromagnetic brake that brakes the traction motor that drives the traction motor, an emergency battery power source, and the control unit is driven by the emergency battery power source in the event of a power failure. In the elevator control device that rescues the car to the nearest floor by the control process of the unit, the elevator control device includes motor winding short-circuiting means for short-circuiting the winding of the traction motor. The calculated load on the car may cause the traction motor to start in the heavy load direction. Only when the load is within a predetermined range, the motor winding short-circuiting means is operated so as to short-circuit the winding of the traction motor, the electromagnetic brake is released by the brake releasing means, and the driving direction detecting means is used. The driving direction of the car is detected, and then the motor winding short-circuit means is operated so as to open the winding short-circuit of the traction motor. In this state, the car is moved by the driving direction detection means. Control processing for driving the traction motor so as to be in the detected driving direction is performed.

  In the present invention configured as described above, the control unit is driven by the emergency battery power supply at the time of a power failure, and the load of the car calculated by the load calculation unit of the control unit may cause the traction motor to start in the heavy load direction. When the load is not within a predetermined range, the control unit activates the electromagnetic brake releasing means to release the electromagnetic brake that has been closed due to a power failure and restarts the traction motor. As a result, the car can be driven in the light load direction and arrive at the nearest floor.

  In addition, when the load calculated by the load calculation unit of the control unit is a load within a predetermined range in which the traction motor may start in the heavy load direction, the control unit is configured to short-circuit the winding of the traction motor. The motor winding short-circuit means is operated, and in this state, a control process is performed to release the electromagnetic brake that is closed due to a power failure by the electromagnetic brake release means. The rotation direction of the traction motor at this time, that is, the driving direction of the car is detected by the driving direction detecting means of the control unit. Thus, when the driving | running | working direction of a car is detected, a control part operates a motor winding short circuit means to open the winding of a traction motor, and performs the control process which restarts a traction motor. Accordingly, the traction motor is continuously driven in the driving direction when the electromagnetic brake is released, that is, in the light load direction, so that the car can arrive at the nearest floor.

  As described above, according to the present invention, the operation for operating the electromagnetic brake at the time of a power failure is only the operation for releasing the electromagnetic brake once, and the operation for driving the traction motor in the direction opposite to the rotation direction so far is required. It is possible to drive the car in the light load direction and arrive at the nearest floor without fail. That is, the present invention reduces the power required for electromagnetic brake control and traction motor control, and allows the car to be rescued to the nearest floor while reducing the power consumption of the emergency battery power supply during a power outage. it can.

  In the present invention, the load within a predetermined range in which the traction motor may start in a heavy load direction is a load of 40% or more and 60% or less.

  Since the present invention is configured to perform processing control to operate the motor winding short-circuiting means so as to short-circuit the winding of the traction motor by the control unit driven by the emergency battery power supply at the time of a power failure, The car can be rescued to the nearest floor while reducing the power consumption of the emergency battery power source. As a result, the present invention makes it possible to reduce the capacity of the emergency battery power supply as compared with the prior art, and to prevent the car from becoming inoperable due to a decrease in the capacity of the emergency battery power supply. Rescue operation can be performed, and passenger safety can be improved.

It is a block diagram which shows the structure of one Embodiment of the elevator control apparatus which concerns on this invention. It is a flowchart which shows operation | movement of this embodiment.

  Embodiments of an elevator control device according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the elevator control apparatus according to the present embodiment calculates a load of the car 8 based on a signal output from a load detector 10 that detects a load of the car 8. And the driving direction and speed of the car 8, that is, the rotational direction and speed of the permanent magnet motor 4 that forms the traction motor that drives the traction machine 5 that moves the car 8 up and down. The control unit 1 includes a driving direction detecting unit 14 that detects a driving direction of the car 8 based on a signal and a brake releasing unit 12 that opens an electromagnetic brake 6 that brakes the permanent magnet motor 4. The permanent magnet motor 4 is driven by a control signal output from the control unit 1 and moves a wire rope that connects the car 8 and the counterweight 9.

  In the present embodiment, the emergency battery power source 2 that drives the control unit 1 in the event of a power failure and the control signal output from the control unit 1 control the power supplied from the emergency battery power source 2 to the permanent magnet motor 4. And an inverter device 3 that converts the electric power to be driven.

  Further, the present embodiment is provided between the inverter device 3 and the permanent magnet motor 4, operates according to the signal output from the brake release means 12 described above, and shorts the winding of the permanent magnet motor 4. Wire shorting means 13 is provided.

  Further, in the present embodiment, at the time of a power failure, in the control unit 1, the load of the car 8 calculated by the load calculation unit 11 is a load within a predetermined range in which the permanent magnet motor 4 may start in the heavy load direction. Only when the load of the car 8 is a load of 40% or more and 60% or less, for example, the motor winding short-circuit means 13 is short-circuited so as to short-circuit the winding of the permanent magnet motor 4 via the brake releasing means 12. The electromagnetic brake 6 closed by the power failure is opened by the brake release means 12, the driving direction of the car 8 is detected by the driving direction detection means 14, and then the winding of the permanent magnet motor 4 is released. In this state, the permanent magnet motor 4 is operated so that the car 8 is in the driving direction detected by the driving direction detecting means 14. It is then configured to perform a control process to be driven.

  Hereinafter, the operation of the present embodiment will be described based on the flowchart shown in FIG. When a power failure occurs, the permanent magnet motor 4 is braked by the electromagnetic brake 6 and stopped. At this time, the emergency battery power supply 2 supplies the control power to the control unit 1.

  Therefore, the control unit 1 determines whether or not the load of the car 8 calculated by the load calculation unit 11 is within a range of 40% or more and 60% or less based on the signal output from the load detector 10 at the time of a power failure. (Procedure S1). When it is determined in this determination that the load on the car 8 is a load that is less than 40% or a load that exceeds 60%, the control unit 1 opens the electromagnetic brake 6 via the brake release means 12, A control process for restarting the permanent magnet motor 4, that is, when the electromagnetic brake 6 is released, a control process for driving the permanent magnet motor in the light load direction, which is the direction in which the permanent magnet motor 4 rotates, is performed. 8 is operated (procedure S2). As a result, the car 8 can be rescued to the nearest floor.

  Further, when the load of the car 8 is determined to be a load included in the range of 40% or more and 60% or less in the determination in the above-described step S1, the control unit 1 temporarily stops the operation of the inverter device 3. Control is performed (step S3). Further, the control unit 1 operates the motor winding short-circuiting means 13 so as to short-circuit the winding of the permanent magnet motor 4 via the brake releasing means 12 (step S4). In this state, the electromagnetic brake releasing means 12 A control process for releasing the electromagnetic brake 6 that is closed in response to a power failure is performed (step S5).

  The rotation direction of the permanent magnet motor 4 at this time, that is, the driving direction of the car 8 is detected by the driving direction detecting means 14 of the control unit 1 based on the signal output from the speed detecting means 7 (step S6). When the driving direction of the car 8 is thus detected, the control unit 1 outputs a signal to the motor winding short-circuit means 13 via the brake releasing means 12 to release the winding of the permanent magnet motor 4. In this manner, the motor winding short-circuit means 13 is operated (step S7), and the inverter device 3 is activated to perform a control process for restarting the permanent magnet motor 4. As a result, the permanent magnet motor 4 is continuously driven in the driving direction when the electromagnetic brake 6 is released, that is, in the light load direction, in the car 8 (step S8). Accordingly, the car 8 can be rescued to the nearest floor and can arrive at the nearest floor.

  According to the present embodiment configured as described above, the operation of operating the electromagnetic brake 6 at the time of a power failure is only an operation of releasing the electromagnetic brake 6 once, and the permanent magnet motor 4 is rotated in the direction of rotation so far. Can drive the car 8 in the light load direction and arrive at the nearest floor without having to drive in the opposite direction.

  That is, in this embodiment, the electric power required for controlling the electromagnetic brake 6 and the electric power required for controlling the permanent magnet motor 4 are reduced, and the power consumption of the emergency battery power source 2 is suppressed at the time of a power failure, and the car 8 is placed on the nearest floor. Can be rescued up to. As a result, the present embodiment can reduce the capacity of the emergency battery power supply 2 and suppress the occurrence of inoperability of the car 8 due to the capacity reduction of the emergency battery power supply 2 so that the car 8 can be placed on the nearest floor. Can be rescued, and passenger safety can be improved.

DESCRIPTION OF SYMBOLS 1 Control part 2 Emergency battery power supply 3 Inverter apparatus 4 Permanent magnet motor (traction motor)
DESCRIPTION OF SYMBOLS 5 Traction machine 6 Electromagnetic brake 7 Speed detection means 8 Riding car 9 Balance weight 10 Load detector 11 Load calculating part 12 Brake release means 13 Motor winding short-circuit means 14 Driving direction detection means

Claims (2)

A load calculating section for calculating a load of the car, a driving direction detecting means for detecting a driving direction of the car, a brake releasing means for releasing an electromagnetic brake for braking a traction motor for driving a traction machine for raising and lowering the car, Elevator control including an emergency battery power source, and driving the control unit with the emergency battery power source in the event of a power failure, and causing the car to be rescued to the nearest floor by the control process of the control unit In the device
Motor winding short-circuit means for short-circuiting the winding of the traction motor,
At the time of a power failure, the control unit calculates the load of the car calculated by the load calculation unit only when the load is within a predetermined range in which the traction motor may start in the heavy load direction. The motor winding short-circuit means is operated so as to short-circuit the winding of the motor, the electromagnetic brake is released by the brake release means, the driving direction of the car is detected by the driving direction detection means, and then the traction The motor winding short-circuit means is operated so as to open the motor winding short-circuit, and in this state, the traction motor is driven so that the car is in the driving direction detected by the driving direction detecting means. An elevator control device characterized by performing a control process. In the elevator control device according to claim 1,
The elevator control device characterized in that a load within a predetermined range in which the traction motor may start in a heavy load direction is a load of 40% or more and 60% or less.

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