JP2009107766A - Elevator control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator control device driving an elevator so as to be reciprocated in a short time between the lowest floor and the highest floor without upsizing equipment of the elevator. <P>SOLUTION: This elevator control device includes a motor (6) driving a sheave (5) for hanging a wire rope (3) with an elevator car (2) and a counterweight (4) hung at its both ends. It is arranged at upper and lower dead ends of a hoistway (1), and is provided with an acceleration/deceleration device accelerating/decelerating the movement of the counterweight (4). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator control device that controls the operation of an elevator, and more particularly to an elevator control device that controls the operation of a shuttle elevator whose main application is a terminal floor reciprocating operation.

A pulley installed in the upper part of the elevator hoistway, a rope suspended over the pulley, a car and a counterweight attached to both ends of the rope, and a linear motor installed on the counterweight And a method of driving the elevator by the driving force of the linear motor has been proposed (see, for example, Patent Document 1).
In recent years, as the number of buildings has risen, the demand for shuttle elevators, which feature a reciprocating operation from the lowest floor to the highest floor and carry many passengers to the destination floor at once, has increased. In this shuttle elevator, the traveling speed is increased as much as possible so that the shuttle can reciprocate between the lowest floor and the highest floor in a short time.

Japanese Patent No. 2622398

However, when the linear motor method according to Patent Document 1 is adopted for such a shuttle elevator, an armature or a secondary conductor for the entire lift of the hoistway is required, which increases the material cost and requires a highly accurate installation technique. There is a problem that the construction cost increases.
Further, in the case of a high lift shuttle elevator, the length of the rope for hanging the car becomes longer, and the equipment such as the car frame and the emergency stop becomes larger, and the amount of mechanical inertia becomes extremely large. In the case of a general elevator that uses a combination of a hoisting machine and an inverter that does not use a linear motor, the amount of inertia is extremely large, which increases the torque that must be generated by the motor during acceleration / deceleration of the elevator. There is a problem that the capacity of the upper machine and the inverter is increased, leading to an increase in the size of the equipment.

  An object of the present invention is to provide an elevator control device that drives an elevator so as to reciprocate between the lowermost floor and the uppermost floor in a short time without increasing the size of the elevator equipment.

  An elevator control device according to the present invention is an elevator control device including an electric motor that drives a sheave on which a wire rope hanging from both ends of a cage and a counterweight is hung. An acceleration / deceleration device for accelerating / decelerating the movement of the weight is provided.

  The effect of the elevator control device according to the present invention is that an acceleration / deceleration is arranged at the upper and lower end portions of the hoistway while the wire rope on which the car and the counterweight are suspended is moved by a hoisting machine composed of a sheave and an electric motor. Since the device accelerates and decelerates the movement of the counterweight, the motor and the inverter that drives the motor are miniaturized by sharing the required torque for moving the cage and counterweight between the hoist and the acceleration / deceleration device. The space of the machine room in which these are installed can be small.

Embodiment 1 FIG.
1 is a schematic diagram of an elevator provided with an elevator control apparatus according to Embodiment 1 of the present invention. FIG. 2 shows an elevator speed, required torque, electric motor generated torque, electric power input to the electric motor, linear motor generated torque, linear motor generated when the car travels for one stroke by the elevator control apparatus according to Embodiment 1 of the present invention. It is a graph which shows input electric power.
The elevator according to Embodiment 1 of the present invention is a shuttle elevator that reciprocates between the lowermost floor and the uppermost floor in the hoistway 1 provided with the uppermost floor landing 12a and the lowermost floor landing 12b. The elevator according to Embodiment 1 of the present invention includes a car 2 in which a passenger reciprocates in the hoistway 1, a main rope 3 that suspends the car 2 at one end, and a balance that is hung at the other end of the main rope 3. A weight 4, a shock absorber 7 on the car 2 side, a shock absorber 8 on the counter weight 4 side, a guide device 9 for guiding the car 2, and a guide rail 11 for guiding the guide device 9 are provided.

  The elevator control apparatus according to Embodiment 1 of the present invention converts the electric power from the sheave 5 that moves the main rope 3, the electric motor 6 that rotates the sheave 5, the power supply 10 for the elevator, and the power supply 10 for the elevator 6. A governor rope 16 that circulates together with the car 2, a governor 15 that converts linear motion of the governor rope 16 into rotational motion, and a position and speed detection encoder 17 attached to the governor 15.

Moreover, the elevator control apparatus according to Embodiment 1 of the present invention includes an upper armature 23 for a linear motor arranged at the upper part of the hoistway, a lower armature 24 for the linear motor arranged at the lower part of the hoistway, and a power supply for the linear motor. 20, a linear motor driving device 21 that converts the power from the linear motor power source 20 to drive the linear motor upper armature 23 or the linear motor lower armature 24, and the linear motor upper armature 23 of the counterweight 4. And a linear motor permanent magnet 22 attached to a surface facing the linear motor lower armature 24, and an elevator controller 14 that controls the electric motor drive device 13 and the linear motor drive device 21 based on information from the encoder 17.
The linear motor upper armature 23, the linear motor lower armature 24, and the linear motor permanent magnet 22 constitute a linear motor as an acceleration / deceleration device.

The encoder 17 analyzes the rotation of the governor 15 to detect the position and speed of the car 2 and sends it to the elevator controller 14 as position information and speed information.
The elevator controller 14 calculates a speed command value and a torque command value based on the position information and speed information of the car 2 from the encoder 17, outputs the speed command value, and the calculated torque command value is a predetermined value. When the torque value is within the range, the torque command value calculated together with the speed command value is commanded to the motor drive device 13 as the torque command value. Further, the elevator controller 14 outputs the speed command value, and when the calculated torque command value is outside the range of the predetermined torque value, the motor drive device 13 uses the upper and lower limit values of the predetermined torque value as the torque command value together with the speed command value. And the difference between the torque command value calculated together with the speed command value and a predetermined torque value range is commanded to the linear motor drive device 21 as a torque command value.

The electric motor drive device 13 converts electric power from the elevator power supply 10 based on the input speed command value and torque command value, and causes an electric motor current proportional to the torque command value to flow through the electric motor 6.
The linear motor drive device 21 converts the electric power from the linear motor power source 20 based on the input speed command value and torque command value, and generates an armature current proportional to the torque command value as the linear motor upper armature 23 or Flow through the lower armature 24 for the linear motor.

When the elevator is in a rated load state, the required torque shown in FIG. 2 (b) is required when the elevator is driven up from the lowermost floor to the uppermost floor with the speed pattern shown in FIG. 2 (a). Therefore, in the range of A where the speed command value is zero, only the electric motor 6 generates the required torque as shown in FIG. Next, in the range of B when the speed command value is a non-zero value, the torque to be generated in the electric motor 6 and the linear motor is divided using a predetermined torque value range. Then, torque as shown in FIG. 2C is generated in the electric motor 6, and electric power as shown in FIG. 2D is input to the electric motor 6 at that time. On the other hand, in the linear motor, torque as shown in FIG. 2 (e) is generated, and at that time, power as shown in FIG. 2 (f) is input to the linear motor.
Thus, when the speed command value is not zero, the required torque is shared between the electric motor 6 and the linear motor.

FIG. 3 is a schematic diagram of an elevator provided with an elevator control device in which a linear motor is removed from the elevator control device according to the first embodiment of the present invention for comparison. FIG. 4 is a graph showing an elevator speed, a required torque, an electric motor generated torque, and an electric power input to the electric motor when the one-stroke car travels by the elevator control device for comparison.
Next, the case where the linear motor is removed will be described in order to explain the effect of arranging the linear motor as the acceleration / deceleration device at the lower part of the hoistway and the upper part of the hoistway.

The elevator provided with the elevator control device for comparison is the same as the elevator provided with the elevator control device according to Embodiment 1 of the present invention, and the same parts are denoted by the same reference numerals and description thereof is omitted.
As shown in FIG. 3, the elevator control device for comparison is different from the elevator control device according to the first embodiment of the present invention except that the linear motor as the acceleration / deceleration device is excluded. However, since the others are the same, the same reference numerals are given to the same parts and the description thereof is omitted.

The elevator controller 28 calculates a speed command value and a torque command value based on the position information and speed information of the car 2 from the encoder 17, and commands the calculated speed command value and torque command value to the motor drive device 13.
When the elevator is in the rated load state, the required torque shown in FIG. 4 (b) is required when the elevator is driven up from the lowermost floor to the uppermost floor with the speed pattern shown in FIG. 4 (a). Therefore, when the speed command value and the torque command value are instructed to the motor drive device 13, torque as shown in FIG. At that time, electric power as shown in FIG.
Thus, the electric motor 6 needs to generate a large torque corresponding to the amount of inertia during acceleration of the elevator, and the electric motor 6 must be enlarged, and the electric motor drive device 13 that supplies electric power to the electric motor 6 must be enlarged. I will have to. Therefore, a large machine room is required to accommodate these enlarged devices. In addition, the capacity of the elevator power supply 10 is increased.

  On the other hand, in the elevator control device according to the first embodiment of the present invention, the torque required for accelerating the elevator is shared by the linear motor, so the torque generated by the electric motor 6 only has to cover the constant speed travel, so the amount of inertia Even if this increases, the size of the electric motor 6 does not have to be increased. Therefore, it is not necessary to increase the capacity of the electric motor drive device 13 and the elevator power supply 10, and it is not necessary to enlarge the machine room.

Embodiment 2. FIG.
FIG. 5 is a schematic diagram of an elevator provided with an elevator control apparatus according to Embodiment 2 of the present invention.
The elevator control apparatus according to Embodiment 2 of the present invention is the same as that of the elevator control apparatus according to Embodiment 1 of the present invention except that a power storage device 30 is added to the elevator control apparatus, and the rest is the same. Reference numerals are added and description is omitted.
The power storage device 30 charges regenerative electric power generated when the linear motor decelerates the counterweight 4, and discharges electric power required by the linear motor when the linear motor accelerates the counterweight 4.
Since the inertial torque generated when the linear motor accelerates the counterweight 4 and the inertial torque generated when the linear motor decelerates the counterweight 4, the power running power and the regenerative power are the same. Are substantially the same, and acceleration / deceleration can be performed with almost no electric power supplied from the outside.

Embodiment 3 FIG.
FIG. 6 is a schematic diagram of an elevator provided with an elevator control apparatus according to Embodiment 3 of the present invention.
The elevator control apparatus according to Embodiment 3 of the present invention is the same as the elevator control apparatus according to Embodiment 2 of the present invention except that linear sensors 25 and 26 are added. Are denoted by the same reference numerals and description thereof is omitted.
The linear sensor 25 is attached to the upper part of the hoistway, and the linear sensor 26 is attached to the lower part of the hoistway. The linear sensors 25 and 26 detect the speed of the counterweight 4 from the amount of change in the position of the counterweight 4 and the position of the counterweight 4 per unit time when the counterweight 4 approaches. Note that the position and speed of the counterweight 4 uniquely determine the position and speed of the car 2.
Then, the position and speed data from the linear sensors 25 and 26 are input to the linear motor driving device 21.
The linear motor drive device 21 uses the position and speed data from the linear sensors 25 and 26 to linearly apply a large thrust in the direction of decelerating the car when the speed exceeds a predetermined monitoring level for the position. Generate to the motor.

A specific example will be described to explain that deceleration is performed by a linear motor when sufficient deceleration is not performed at the end of the hoistway. The elevator speed indicated by the solid line in FIG. 7A is when the speed is normally reduced, and the elevator speed indicated by the thick dotted line in FIG. 7A is when the speed is abnormally reduced.
For example, when the car 2 starts increasing at the position A in FIG. 7 and the speed exceeds the monitoring level at the position B in FIG. 7, the linear motor driving device 21 decelerates the car 2 with respect to the linear motor. A larger thrust is generated in the direction so that the speed of the car 2 decreases. Then, since the speed of the car 2 decreases, even if the car 2 does not stop before arrival at the terminal end, the speed can be reduced below the allowable collision speed of the shock absorber 7. Thus, it can be used as a terminal floor forced deceleration device.

1 is a schematic diagram of an elevator provided with an elevator control apparatus according to Embodiment 1 of the present invention. FIG. The elevator speed, required torque, electric motor generation torque, electric power input to the electric motor, linear motor generation torque, and input electric power to the linear motor when the one-stroke car travels by the elevator control device according to Embodiment 1 of the present invention are shown. It is a graph. It is the schematic of the elevator which provided the elevator control apparatus except a linear motor for the comparison. It is a graph which shows the elevator speed, the required torque, the electric motor generation | occurrence | production torque, and the input electric power to an electric motor when a one-stroke car drive | works with the elevator control apparatus for a comparison. It is the schematic of the elevator which has arrange | positioned the elevator control apparatus which concerns on Embodiment 2 of this invention. It is the schematic of the elevator which has arrange | positioned the elevator control apparatus which concerns on Embodiment 3 of this invention. It is a graph for demonstrating a mode that the thrust for braking is generated when abnormality occurs in the deceleration of speed.

Explanation of symbols

  1 hoistway, 2 cages, 3 main ropes, 4 counterweights, 5 sheaves, 6 electric motors, 7 and 8 shock absorbers, 9 guide devices, 10 power supplies for elevators, 11 guide rails, 12a top floor landing, 12b bottom Floor landing, 13 Electric motor drive, 14, 28 Elevator controller, 15 Governor, 16 Governor rope, 17 Encoder, 20 Linear motor power supply, 21 Linear motor drive, 22 Linear motor permanent magnet, 23 Upper armature for linear motor, 24 Lower armature for linear motor, 25, 26 Linear sensor.

Claims (3)

In an elevator control device including an electric motor that drives a sheave on which a wire rope is hung from both ends and a counterweight,
An elevator control device comprising an acceleration / deceleration device arranged at the upper and lower end portions of the hoistway and accelerating / decelerating the movement of the counterweight.   A power storage device that charges the regenerative power generated by the acceleration / deceleration device when decelerating the movement of the counterweight and discharges the regenerative power when accelerating the movement of the counterweight to supply powering power to the acceleration / deceleration device; The elevator control device according to claim 1.   2. The elevator according to claim 1, wherein when it is detected that the car is not decelerated at a predetermined speed at the upper and lower end portions, thrust is generated in a direction in which the car is braked by the acceleration / deceleration device. Control device.

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