阅读说明：本技术 电梯控制装置及电梯控制方法 (Elevator control device and elevator control method ) 是由 伊藤然一 于 2017-06-21 设计创作，主要内容包括：在诊断电梯的曳引机的制动装置的制动能力时,降低所需的电机转矩,抑制对电源供给设备带来的损伤。在被配置在电梯的井道内的轿厢从被制动装置保持静止的状态起通过制动控制部对制动装置施加吸引力而降低了作用力的状态下,通过电机控制部使曳引机的电机产生电机转矩,使电机旋转。此时检测所施加的吸引力和电机转矩,并且根据所施加的吸引力、电机转矩以及由负荷检测器检测出的负荷转矩的值检测制动装置的制动能力。(When the braking capability of a braking device of a hoisting machine of an elevator is diagnosed, the required motor torque is reduced, and the damage to a power supply device is restrained. In a state where a car disposed in a hoistway of an elevator is reduced in an acting force by applying an attraction force to a braking device by a braking control unit from a state where the car is held stationary by the braking device, a motor torque is generated by a motor of a hoisting machine by the motor control unit to rotate the motor. At this time, the applied attractive force and the motor torque are detected, and the braking capability of the braking apparatus is detected from the values of the applied attractive force, the motor torque, and the load torque detected by the load detector.)

1, kinds of elevator control device,

the elevator device comprises:

a car disposed in a hoistway of an elevator;

a hoisting machine that drives the lift of the car; and

a braking device that brakes a motor of the hoisting machine by pressing a movable part with an urging force and releases braking by attracting the movable part against the urging force with an attraction force,

the elevator control device is provided with the elevator device:

a brake control unit that controls the attractive force to control a braking capability of the brake device;

a motor control unit that controls a motor torque generated by the motor;

a load detector that detects a magnitude of load torque required for the hoisting machine to hold the car stationary in a state where braking by the braking device is released; and

and a braking capability detection control unit that, in a state where the acting force is reduced by the application of an attractive force by the braking control unit from a state where the car is held stationary by the braking device, applies the motor torque by the motor control unit to rotate the motor, detects the applied motor torque, and determines the braking capability of the braking device from the applied attractive force, the motor torque, and the load torque detected by the load detector.

2. The elevator control apparatus according to claim 1,

the braking capability detection control unit sets the attractive force applied to the brake control unit so as to reduce the acting force to a fixed value.

3. The elevator control apparatus according to claim 1 or 2, wherein,

the braking capability detection control section corrects the braking capability of the braking device detected from the detected motor torque and the load torque, using the applied attractive force.

4. The elevator control apparatus according to any of claim 1 to 3,

the braking capability detection control unit increases the motor torque by the motor control unit in a state where the attractive force is applied by the braking control unit, detects a 1 st motor torque and the applied 1 st attractive force when the motor starts rotating, and obtains a holding torque of the braking device from the 1 st motor torque, the load torque, and the 1 st attractive force.

5. The elevator control apparatus according to any of claims 1 to 4,

the braking capability detection control unit controls the motor torque so that the motor rotates at a fixed rotational speed by the motor control unit, detects a 2 nd motor torque and an applied 2 nd attractive force in a state where the motor has the fixed rotational speed, and obtains the braking torque of the braking device from the 2 nd motor torque, the load torque, and the 2 nd attractive force.

6. The elevator control apparatus according to claim 5,

the braking capability detection control unit controls the motor torque so that the motor rotates at a speed lower than a traveling speed of the elevator apparatus during normal traveling, when the motor is rotated at a fixed rotational speed by the motor control unit.

7. The elevator control apparatus according to any of claims 1 to 6,

the braking device is provided with: a spring that generates the force; and a brake coil to which a current is applied to thereby generate the attractive force,

the braking capability detection control unit applies a current to the brake coil by the braking control unit, thereby generating the attractive force and reducing the acting force.

8. The elevator control apparatus according to any of claims 1 to 7,

the braking capability detection control unit increases the attraction force by the braking control unit after the motor torque is applied by the motor control unit to rotate the motor, detects a 3 rd attraction force when the movable unit is attracted and braking is released, and corrects the braking capability detected by the detection unit using the 3 rd attraction force.

9. The elevator control apparatus according to any of claims 1 to 8,

the braking capability detection control unit increases the attractive force applied by the braking control unit in a state where the car is held stationary by the braking device, detects an upper limit attractive force when the motor starts rotating, and sets the attractive force applied to the car to be in a state where the acting force is reduced by the braking control unit in a value lower than the upper limit attractive force when the braking capability is detected

10. The elevator control apparatus according to any of claims 1 to 8,

the braking capability detection control unit applies the motor torque in a direction in which the motor rotates in a direction of the travel command when the motor torque is applied by the motor control unit in a state in which the attraction force is applied by the braking control unit when a travel command for the car is input, and applies the attraction force by the braking control unit after the motor torque, the attraction force, and the load torque are detected, attracts the movable unit to release braking, and applies the motor torque by the motor control unit to cause the car to travel in accordance with the travel command.

11, elevator control method, the elevator device has a braking device which brakes a motor of a hoisting machine which lifts a car in a hoistway of an elevator by pressing a movable part with an urging force, and releases the braking by attracting the movable part against the urging force with an attraction force, wherein in the elevator control method, for the elevator device,

detecting a load torque required to hold the car stationary in a state where braking by the braking device is released;

rotating the motor to apply a motor torque and detecting the applied motor torque in a state where an attractive force is applied and an acting force is reduced from a state where the car is held stationary by the braking device;

and calculating the braking capacity of the braking device according to the applied attraction force, the motor torque and the detected load torque.

Technical Field

The present invention relates to an elevator control device and an elevator control method, and particularly to a brake capability diagnosis of a brake device of an elevator hoisting machine.

Background

In a general elevator, a car disposed in a hoistway is suspended in a pin manner from a counterweight on the other end side by a rope, which is a main rope wound around a sheave of a hoisting machine, and is driven to ascend and descend by a motor of the hoisting machine.

A brake drum (brake drum) is disposed on a shaft that engages a motor and a sheave of the traction machine. Further, the following braking device is provided: the brake is applied to the rotation of the hoisting machine motor by pressing the movable part against the brake drum by the biasing force of the spring, and the movable part is attracted from the brake drum by an electromagnetic force generated by the current flowing through the brake coil to separate the movable part from the brake drum to release the brake.

In this type of elevator, when the car is stopped, the motor is held in a stationary state by the brake device, and the car is held at a stop position, and , when some abnormality is detected during the travel of the car and the car is brought to an emergency stop, the brake device is also operated, and the hoisting machine motor is decelerated and stopped, and the car is immediately stopped.

Therefore, it is necessary to set the braking capability of the brake device to an appropriate value and to perform a regular maintenance check to diagnose whether or not the braking capability is abnormal.

To solve such problems, the following elevators are known: in a non-load state where passengers and the like are not present in the car, the braking device is operated in advance, the motor torque is applied so that the sum of the unbalanced torque generated by the weight imbalance of the car and the counterweight and the motor torque becomes equal to the braking capability of the braking device at a normal time, and the normality and abnormality of the braking capability of the braking device are diagnosed based on the operating state of the car detected from the amount of change in the motor rotation angle or the rotation speed at that time (for example, patent document 1 below).

Further, there is known an elevator braking torque measuring device including: the motor is rotated in a state where the braking device is operated, and the braking capability of the braking device is diagnosed based on the motor torque at that time and an unbalanced torque generated due to a weight imbalance between the car and the counterweight (for example, patent document 2 described below).

Prior art documents

Patent document

Patent document 1: japanese laid-open patent publication No. 2008-133096

Patent document 2: japanese laid-open patent publication No. 2004-168501

Disclosure of Invention

Problems to be solved by the invention

However, even in a state where the braking capability of the brake device of the elevator is reduced, the braking capability of holding the car to which the load 1.25 times as large as the load is applied is required. Therefore, the braking capability at the time of normal operation is set to a very large value. In the related art, since the motor is rotated by the motor torque in a state where the brake device is operated, a very large motor torque is required. Therefore, there is a problem that damage to the device that supplies current to the motor at the time of diagnosis is increased and the device life is shortened.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide types of elevator control devices and elevator control methods that reduce the magnitude of motor torque required for diagnosis and thereby suppress damage to devices that supply current to a motor.

Means for solving the problems

The invention provides elevator control devices and the like, wherein an elevator device comprises a car disposed in a hoistway of an elevator, a hoisting machine which drives the car to ascend and descend, and a braking device which presses a movable part with an acting force to brake a motor of the hoisting machine and sucks the movable part against the acting force with an attractive force to release braking, wherein the elevator control device comprises a braking control part which controls the attractive force to control the braking capability of the braking device, a motor control part which controls a motor torque generated by the motor, a load detector which detects the magnitude of a load torque required for the hoisting machine to hold the car stationary in a state where the braking of the braking device is released, and a detection control part which detects the motor torque applied by the motor control part to rotate the motor and detects the applied motor torque, and obtains the load of the elevator device from the attractive force applied by the braking control part, the detected motor torque, and the detected load of the braking device.

Effects of the invention

In the present invention, damage to the device that supplies current to the motor can be suppressed by reducing the magnitude of the motor torque required for diagnosis.

Drawings

Fig. 1 is a schematic configuration diagram illustrating an overall example of an elevator system including an elevator control device according to each embodiment of the present invention.

Fig. 2 is an operation flowchart showing a flow of series operations of the elevator control device according to embodiment 1 of the present invention.

Fig. 3 is a waveform diagram showing the response of each of the current, the force, the braking torque, and the motor torque when the current is applied to the brake coil in embodiment 1 of the present invention.

Fig. 4 is an operation flowchart showing a flow of series operations of the elevator control device according to embodiment 2 of the present invention.

Fig. 5 is a waveform diagram showing the response of each of the current, the force, and the motor rotation speed when the current is applied to the brake coil according to embodiment 3 of the present invention.

Fig. 6 is an operation flowchart showing a flow of series operations at the time of diagnosis by the elevator control device according to embodiment 3 of the present invention.

Fig. 7 is a schematic diagram of an example showing a peripheral configuration of a hoisting machine of an elevator control device according to each embodiment of the present invention.

Detailed Description

According to the present invention, the motor control unit controls the motor torque to rotate the motor in a state where the brake control unit applies the attractive force to reduce the biasing force. Since the diagnosis can be performed in a state where the braking capability is reduced by reducing the acting force, the value of the motor torque required to rotate the motor can be suppressed. Thus, an elevator control device in which damage to equipment is suppressed can be obtained.

Next, an elevator control device and an elevator control method according to the present invention will be described with reference to the drawings according to embodiments. In each embodiment, the same or corresponding portions are denoted by the same reference numerals, and redundant description thereof is omitted.