JP2007008714A - Elevator control device and elevator repairing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve transporting ability by raising actual speed Va of an elevator car 9 in the condition assigned to an elevator. <P>SOLUTION: A hoisting motor 10 is controlled so that the maximum speed Vm when the car 9 rises at a rated loading quantity Co becomes the actual rated speed Vaf determined in consideration of ability of a hoisting machine 6 and the hoisting motor 10, and a nominal rated speed Vrt nominated as a rated speed is set with deviation within the predetermined range in relation to the actual rated speed Vaf. Inside a balance loading area, in which the car 9 takes balance with a counterweight 7, the hoisting motor 10 is controlled so as to obtain the balance area speed higher than the nominal rated speed Vrt in a range, in which the maximum speed Vm of the actual speed Va does not exceed an allowable limit Vatt set on the basis of the nominal rated speed Vrt as a standard. Outside the balance loading area, the hoisting motor 10 is controlled so that the maximum speed Vm of the actual speed Va becomes a speed V determined in consideration of ability of the hoisting motor 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator control apparatus in which the ascending / descending speed is changed in accordance with a load actually loaded on a car.

The elevator hoisting motor repeats four-quadrant operation of forward and reverse rotation and power running regeneration, and the load fluctuation is remarkable. For this reason, it is a limited time period for the car to reach the rated load capacity, and when the load applied to the hoisting motor is light, the lifting speed is increased within the allowable range of the hoisting motor to improve the transportation capacity. be able to.
Therefore, as a conventional elevator control device that changes the ascending / descending speed in accordance with the load loaded on the car, for example, in Patent Document 1, the fastest to the destination floor is within the range of the hoisting motor characteristics. An approach for generating a reaching car speed pattern is disclosed.
By the way, a speed governor is installed in the elevator as a safety device. If the speed of the car becomes overspeed regardless of whether it is ascending or descending, or regardless of the load capacity, Is supposed to stop.

FIG. 8 is an explanatory diagram showing requirements for regulating the speed of a conventional elevator. In the figure, the nominal rated speed Vr is the speed described in the design book, and is called as the maximum speed that has been accelerated when the rated load is raised with a rated load of 100% of the load. Say speed. The actual rated speed Vaf is the maximum speed that has been accelerated when the load is increased by the rated load, and is a speed determined from the capacity of the hoisting machine or hoisting motor. Here, the actual rated speed Vaf must be 90% to 105% of the nominal rated speed Vr (JIS A 4302 inspection standard for elevators). Therefore, the upper limit value Vaft of the actual rated speed Vaf is Vaft = 1.05 Vr. In addition, when no load is placed on the car, that is, when a load of 110% of the rated load is applied when there is no load, it is determined to be 125% or less of the nominal rated speed Vr (JIS A 4302 elevator Inspection standard). The actual speed Va within a predetermined equilibrium loading area including other loads, that is, an equilibrium load in which the load of the car is balanced with the counterweight is restricted by the operating speed of the overspeed switch of the governor. The operating speed of the overspeed switch is slightly different depending on the nominal rated speed Vr, but in 2000 Ministry of Construction Notification No. 1423 “Defining the Elevator Braking Structure” No. 2 “Rope Elevator Braking System” Usually, it is determined to be set within 1.3 times the nominal rated speed Vr. The upper limit of the actual speed Va must be equal to or less than the value obtained by subtracting the operating margin Vsm for preventing malfunction due to car shake or the like from the operating speed of the governor.
Therefore, the upper limit of the speed at rated load, no load, 110% overload, and other load ranges is determined based on the nominal rated speed Vr as described above.

JP 2003-238037 A

The conventional elevator control device is configured as described above, and the one described in Patent Document 1 generates a car speed pattern that reaches the destination floor earliest within the range of the characteristics of the hoisting motor. Is.
However, the rated speed must be designated for the elevator, and as mentioned above, the actual speed is subject to safety restrictions such as the Ministry of Construction Notification and Elevator Inspection Standard. There was a problem that the speed could not be selected freely.

The present invention has been made to solve the above-described problems, and provides an elevator control device that increases the actual speed of a car and improves the transportation capacity under the conditions imposed on the elevator. Objective.
Also, in elevator renovation work, which involves changing the elevator control system from an existing product to a new product, the car is transported at a higher actual speed than the existing elevator under the conditions imposed on the elevator. The purpose is to provide an elevator renovation method that improves the capacity and enhances the significance of the renovation work.

  The elevator control apparatus according to the present invention controls an elevator hoisting machine in which a car is suspended on one side of a main rope and a counterweight is suspended on the other side, and a hoisting motor that drives the hoisting machine. The actual speed when the car is actually moved up and down by being driven by the hoisting motor, the maximum speed when the car is raised with the rated load capacity is set to the hoisting machine or the hoisting machine. The hoisting motor is controlled at the actual rated speed determined from the capacity of the upper motor, and the nominal rated speed called as the rated speed is set to be higher than the actual rated speed within a predetermined range. Within a predetermined equilibrium loading area that includes an equilibrium loading quantity that balances the counterweight, the maximum speed of the actual speed in the loading area does not exceed the allowable limit set based on the nominal rated speed. Higher than the rated speed above The hoisting machine is controlled so as to have an equilibrium range speed, and outside the equilibrium loading area, the maximum speed of the actual speed is determined by the capacity of the hoisting machine or the hoisting motor. The hoisting machine is controlled.

  Further, in the elevator repair method according to the present invention, at least the existing hoisting machine of the existing elevator is continuously used, and the control device that controls the hoisting motor that drives the hoisting machine is installed in the existing control device. The elevator motor is replaced with a newly installed control device, and the hoisting motor is controlled so that the actual rated speed of the car by the newly installed control device is equal to the actual rated speed by the existing control device. In addition, the nominal rated speed of the elevator after the modification is modified to be higher than the actual rated speed within a predetermined range, and the predetermined load balance including the balanced load capacity that balances the load capacity of the car with the counterweight. In the loading area, the maximum speed of the car in the loading area is higher than the nominal rated speed within a range that does not exceed the allowable limit set based on the nominal rated speed. The hoisting motor is controlled so as to have a zone speed, and outside the equilibrium loading zone, the maximum speed of the actual speed of the car is a speed determined from the capacity of the hoisting machine or the hoisting motor. In this way, the hoisting motor is controlled.

Since this invention is comprised as mentioned above, there exist the following effects.
According to the elevator control apparatus of the present invention, the nominal rated speed is set to be higher than the actual rated speed within a predetermined range, and the maximum actual speed is based on the nominal rated speed in the balanced load range. The hoisting motor is controlled so as to achieve a high equilibrium range speed set to, and outside the equilibrium loading range, the hoisting motor or hoisting motor has a maximum speed that is determined by the capacity of the hoisting machine or hoisting motor. The upper motor is controlled, and the car is operated at a speed exceeding the actual rated speed over substantially the entire area up to the rated load capacity. In particular, in an equilibrium loading area, the engine is operated at an equilibrium area speed set high within an allowable limit set based on the nominal rated speed. For this reason, there exists an effect that a transport capability can be improved.

  Further, according to the newly installed control device according to the elevator repair method of the present invention, the actual rated speed of the car is set to the same value as the actual rated speed of the existing control device, and the nominal rated speed of the elevator after the repair is set to the actual rated speed. In the balanced loading area, the winding speed is set so that the equilibrium speed is higher than the nominal rated speed within the allowable limit set based on the nominal rated speed. Since the hoisting motor is controlled so that the speed is determined by the hoisting machine or the hoisting motor capacity outside the balanced load range, the hoisting motor is controlled to the rated load capacity. The vehicle is operated at a speed exceeding the actual rated speed over substantially the entire area. In particular, in an equilibrium loading area, the engine is operated at an equilibrium area speed set high within an allowable limit set based on the nominal rated speed. For this reason, there is an effect that the transportation capacity can be improved and the significance of the repair work can be enhanced.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, and duplication of description was omitted.
Embodiment 1 FIG.
In the first embodiment, an existing hoisting machine for an existing elevator and an existing hoisting motor for driving the hoisting machine are continuously used, and a control device for controlling the hoisting motor is used as an existing control device. The present invention relates to a method for repairing an elevator which is to be replaced with a newly installed control device.
1 to 6 show Embodiment 1 of the present invention.
FIG. 1 is an explanatory diagram showing requirements for regulating the speed of an elevator in contrast with requirements for regulating the speed of a conventional elevator.

The conventional example is as shown in FIG. 8, and will be described again here. That is, the nominal rated speed Vr is a speed described in the design book, and is referred to as a maximum speed that has finished accelerating when a load of 100% of the loaded load, that is, the rated loaded amount Co is raised. Say speed. The actual rated speed Vaf is the maximum speed that has been accelerated when the load increases with the rated load capacity Co, and is a speed determined from the capabilities of the hoisting motor 10 and other control devices. Here, the actual rated speed Vaf must be 90% to 105% of the nominal rated speed Vr (JIS A 4302 inspection standard for elevators). Therefore, the upper limit value Vaft of the actual rated speed Vaf is Vaft = 1.05 Vr. Further, when a load is not placed on the car 9, that is, when there is no load and when a load of 110% of the rated load Co is loaded, it is determined that the nominal rated speed Vr is 125% or less (JIS A). 4302 Inspection standard for elevators).
In addition, the actual speed Va within a predetermined equilibrium loading area including an equilibrium load in which the load of the car balances with the counterweight is equal to or less than the value obtained by subtracting the switch operating margin Vsm from the operating speed of the overspeed switch of the governor. It is possible to change.

Next, the speed regulation requirement employed in the first embodiment will be described.
Here, the actual rated speed Vaf of the car 9 by the new control device is set to the same value as the actual rated speed Vaf by the existing control device, and the nominal rated speed Vrt of the elevator after the repair is Vrt = Vaf / 0.9. . That is, the nominal rated speed Vrt is set to 1.11 times the actual rated speed Vaf. Accordingly, the operating speed Vg of the overspeed switch of the governor is normally defined to be set within 1.3 times the nominal rated speed (however, when the rated speed is 45 m / min or less, 68 m / min). allowed to min.). Therefore, the upper limit value Vgt of the operating speed Vg is normally Vgt = 1.3 Vrt (= 1.11 × 1.3 × Vaf). Therefore, the upper limit value Vatt of the actual speed Va is a value obtained by looking at the operating margin Vsm of the overspeed switch with respect to the upper limit value Vgt, that is, Vatt = 1.3 Vrt−Vsm.
As apparent from FIG. 1, in the conventional example, the deviation between the actual rated speed Vaf and the nominal rated speed Vr is normally about 1%, whereas in the first embodiment, the nominal rated speed Vrt is the actual rated speed. Since the speed Vaf is 1.11 times, the change range of the actual speed Va is from the actual rated speed Vaf to the upper limit value Vatt. Here, since the upper limit value Vatt is a value obtained by subtracting the operating margin Vsm from the operating speed Vgt of the overspeed switch of the governor, Vatt = 1.11 × 1.3Vaf−Vsm.
Taking the case of 60 m / min as an example (assuming that the actual speed Va = the nominal rated speed Vr), the upper limit value Vat of the conventional example is Vat = 1.3 × 60−Vsm. Assuming that the operating margin Vsm = 5 m / min, the upper limit value Vat = 73 m / min, whereas the upper limit value Vatt of the actual speed Va in the first embodiment is Vatt = 1.11 × 1.3 ×. 60−Vsm = 82 m / min. In the conventional example, the speed is increased by 13 m / min, but in the first embodiment, the speed can be increased by 21 m / min. The speed increase rate is 22% in the prior art, but is 35% in the first embodiment.

FIG. 2 is an explanatory diagram showing energy transfer in the drive system of the elevator.
A car 9 is suspended on one side of the main rope 8 that is wound around the hoisting machine 6 and suspended, and a counterweight 7 is suspended on the other side. The hoisting machine 6 is driven by the hoisting electric motor 10 via the speed reducer 6a. The electric power supplied from the power supply device 29 is converted into an AC power supply of variable voltage and variable frequency by the inverter device 28 and energizes the hoisting motor 10.
The speed of the car 9 is V (m / s), the car total weight W (N) and the load capacity C (N) are added to the total car weight M (N), the counterweight is m (N) The weight m is a weight obtained by adding 50% of the car's own weight W and the rated load capacity Co (N). The lifting energy Pm (w) when raising and lowering the car 9 at the raising / lowering speed V (m / s) is Pm = V (M−m). Further, since M = (W + C) and m = {W + (Co / 2)}, Pm = V {C− (Co / 2)}.

1. Power running operation Power running operation is an operation in which energy is supplied from the power supply device 29 to the hoist 6. That is, the power supply device 29 supplies energy loss in the intermediate wires, energy loss in the inverter device 28, the hoisting motor 10, the speed reducer 6a, and the like, and supplies the lifting energy Pm to the car 9 side. During powering operation, the efficiency of the speed reducer 6a is η. Therefore, the electric wire, the inverter device 28, the hoisting motor 10, the speed reducer 6a, and the like have the ability to load the rated load amount Co on the car 9 side and raise it at the actual rated speed Vaf.
When the load capacity C of the car 9 is a load capacity C smaller than the rated load capacity Co, that is, as the total car weight M approaches the counterweight weight m, the lift energy Pm is also higher than the lift energy Pmo at the rated load capacity Co. Becomes smaller. For this reason, a margin arises in the electric wire, the inverter device 28, the hoisting motor 10, the speed reducer 6a, and the like.
Therefore, when the load is C, the lifting speed can be increased to the lifting speed V that is equal to the lifting energy Pmo at the rated load Co. That is,
Pmo = V | C- (Co / 2) |
∴V = Pmo / | C- (Co / 2) | (1)
It becomes. This relationship is shown in FIG.

2. During braking operation The braking operation is an operation in which energy is returned from the car 9 side to the power supply device 29 via the speed reducer 6a, the hoisting motor 10, and the inverter device 28. At this time, as in the power running operation, a loss occurs in each device. In particular, when a worm gear is used for the speed reducer 6a, the reverse efficiency γ is obtained, and the lifting energy Pm returned to the hoisting motor 10 and the inverter device 28 is reduced. Accordingly, there is a margin in the hoisting motor 10 and the inverter device 28 when descending at the rated load capacity Co. For this reason, as far as the hoisting motor 10 and the inverter device 28 are concerned, the lifting speed V can be increased during the descending operation even if the rated load capacity Co is used.
However, with respect to the speed reducer 6a, an energy loss substantially equal to that during power running occurs during braking operation. For this reason, during the braking operation, the ascending / descending speed V is restricted by the speed reducer 6a.

For example, a case where the reduction ratio is 67: 1 will be described as an example of energy loss in the reduction gear 6a. There is calculation data that the reverse efficiency γ = 0.39 in the braking operation is compared with the efficiency η = 0.63 in the power running operation. The energy loss Lm in the speed reducer 6a is expressed by the following equation with respect to the lifting energy Pm on the car 9 side during power running. That is,
Lm = (Pm / η) −Pm = Pm (1−η) / η
On the other hand, the energy loss Lb during braking operation is expressed by the following equation. That is,
Lb = Pm−γPm = Pm (1−γ)
Here, when η = 0.63 and γ = 0.39 are substituted, Lm = 0.59 Pm and Lb = 0.61 Pm, which are substantially the same although they are slightly higher during the braking operation.
As the total car weight M approaches the counterweight m, the lifting energy Pm also becomes smaller than the lifting energy Pmo at the rated load capacity Co, and the energy losses Lm and Lb both decrease accordingly. As the energy losses Lm and Lb decrease, the raising / lowering speed V of the car 9 can be increased. This relationship is the same as that during power running, and it is considered that the above formula (1) is also established during braking. Based on this idea, the relationship between the loading capacity C and the lifting speed V during braking operation is also shown in FIG.

Considering the hoisting motor 10 when the elevating speed V is varied, the following relationship is established when the rated torque To, the applied voltage Vo and the current Io, and the magnetic flux Φo of the rotating magnetic field of the hoisting motor 10 are satisfied. .
To = Φo ・ Io
Vo = d (Φo) / dt
When the frequency is increased n times to increase the raising / lowering speed V of the car 9, the peak value of the applied voltage Vo is suppressed, so that the magnetic flux Φo must be increased (1 / n) times. Therefore, the torque Tn when the rated current Io is passed is
Tn = (Φo / n) · Io = To / n
That is, when the elevating speed V is increased n times, the torque Tn becomes (1 / n) times the rated torque To. As the total car weight M approaches the counterweight m, the torque T decreases and the lifting energy Pm also decreases. The raising / lowering speed V can be increased in the state where the current of the hoisting motor 10 is maintained at the rated current Io by the amount by which the raising / lowering energy Pm is reduced.

FIG. 4 is an explanatory diagram showing the maximum speed Vm of the actual speed Va of the elevator after the refurbishment. The maximum speed Vm is the regulation requirement for the speed of the elevator shown in FIG. 1 and the inverter shown in FIG. It is determined from the requirements regulated by the capabilities of the device 28, the hoisting motor 10 and the speed reducer 6a.
First, the lifting speed V determined from the capabilities of the hoisting motor 10 and the hoisting machine 6 shown in FIG. 3 is set to the maximum speed Vm of the actual speed Va of the car 9. That is, the maximum speed Vm when the load increases with the rated load capacity Co is set as the actual rated speed Vaf. Therefore, it becomes the same value as the actual rated speed Vaf adopted in the existing control device. Since the balanced load Cb in which the car 9 and the counterweight 7 are balanced is 50% of the rated load Co, even when there is no load, the hoisting motor 10 has the same load torque as the rated load Co. The maximum speed Vm is also equal to the actual rated speed Vaf.
As the load capacity C approaches the equilibrium load capacity Cb (= Co / 2), the maximum speed Vm can be increased along the curve represented by the equation (1) as shown in FIG.

  As shown in FIG. 1, the nominal rated speed Vrt of the elevator after the repair is 111% of the actual rated speed Vaf, and 130% of the nominal rated speed Vrt is the operating speed of the overspeed switch of the governor. A value obtained by subtracting the operating margin Vsm from the value is the upper limit value Vatt of the actual speed Va. When the load amount C becomes the load amount Cb1, the maximum speed Vm becomes equal to the upper limit value Vatt. Similarly, at the load amount Cb2, the maximum speed Vm is equal to the upper limit value Vatt. The balance between the load capacity Cb1 and the load capacity Cb2 including the equilibrium load capacity Cb is defined as an equilibrium load area, and the maximum speed Vm of the actual speed Va of the car 9 within this equilibrium load area is defined as the equilibrium area speed. Here, the equilibrium region speed is set to the upper limit value Vatt.

FIG. 5 is a block diagram showing the overall configuration of the elevator control apparatus.
A car operation panel 3 is attached to the car 9 housed in the hoistway 1, and a car call that designates the destination floor of the car 9 is registered. The load amount C of the car 9 is weighed by a scale device 19. A landing button 20 is attached to the landing 4, and a landing call for calling the car 9 is registered.

The main rope 8 is wound around a hoisting machine 6 installed at the top of the hoistway 1 and suspended, and on the other hand, a car 9 is suspended and a counterweight 7 is suspended. The hoisting machine 6 is driven by the electric motor 10 via the speed reducer 6a. An encoder 10a is attached to the motor shaft so as to detect the angular speed, that is, the speed of the car 9. The car position calculation device 22 calculates the current position of the car 9 by integrating the speed signals from the encoder 10a.
When the car call or the hall call is registered, the next stop floor determination device 21 determines the next stop floor where the next call to be answered is registered. The lift distance calculation device 23 calculates the lift distance from the current position of the car 9 to the next stop floor, that is, the remaining lift distance D. The load torque calculation device 26 calculates the load torque from the load amount C measured by the scale device 19 and the operation direction.

  The maximum speed setting device 24 sets the maximum speed Vm of the actual speed Va of the car 9 based on the loading amount C of the car 9. Specifically, the load amount / maximum speed table shown in FIG. 4 is arranged in correspondence with the load amount C and the maximum speed Vm, and the maximum speed Vm corresponding to the load amount C is read from the table. Output. The speed pattern generator 25 generates a speed pattern based on predetermined acceleration and deceleration, the lift distance D from the lift distance calculator 23, and the maximum speed Vm from the maximum speed setting device 24. The inverter control device 27 controls the inverter device 28 based on the load torque, the speed pattern, and the speed feedback signal. The inverter device 28 is supplied with electric power from the power source 29 and energizes the electric motor 10 to drive the hoisting machine 6.

FIG. 6 is a flowchart showing a procedure for generating a speed pattern generated by the elevator control apparatus.
When the hall call or car call is registered in step S11, the process proceeds to step S12, the next stop floor corresponding to the call to be answered is determined, and the driving direction of the car 9 is determined. In step S13, the lifting distance D is calculated based on the current position of the car 9 and the position data of the next stop floor. In step S14, the process waits for the door closing to be completed and proceeds to step S15. When the door is closed, the loading amount C of the car 9 is determined. In step S15, the load torque is calculated from the determined loading amount C and the driving direction.

  In step S16, the maximum speed Vm corresponding to the load amount C is set. Specifically, as described above, the maximum speed Vm is read from the load quantity / maximum speed table 24a in which the load capacity C and the maximum speed Vm shown in FIG. In step S17, a speed pattern is generated based on the lifting distance D, the maximum speed Vm, and the driving direction. The acceleration and deceleration are determined in advance. First, an acceleration distance and a deceleration distance for reaching the maximum speed Vm are calculated. When the lift distance D calculated in step S13 is a short distance as indicated by reference sign D1 and the total value of the acceleration distance and the deceleration distance exceeds the lift distance D1, the acceleration speed Dm does not reach the maximum speed Vm. A speed pattern P1 to be decelerated is generated. Further, when the ascending / descending distance D is a long distance as indicated by reference sign D2 and the ascending / descending distance D2 is longer than the total value of the acceleration distance and the deceleration distance, a speed pattern P2 reaching the maximum speed Vm is generated. Each speed pattern is subdivided from the starting position of the car 9 to the next stop floor, and a lift distance / lift speed table 25a in which the actual speed Va is arranged corresponding to the lift distance D from each position to the next stop floor. Is generated.

  When a start command is issued in step S18, the remaining lift distance D to the next stop floor is calculated in step S19. That is, the distance that has been raised and lowered up to that time is subtracted from the raising and lowering distance D calculated in step S12. In step S20, the lifting speed V corresponding to the remaining lifting distance D is set according to the speed pattern. Specifically, the actual speed Va corresponding to the remaining lift distance D is read from the lift distance / lift speed table 25a. The read actual speed Va is commanded to the inverter control device 27 as a speed command value. The inverter control device 27 controls the inverter device 28 based on the command. In step S21, it is checked whether the destination floor has been reached. Specifically, in the lifting distance / lifting speed table 25a, the remaining lifting distance D is (D-nd) = 0 or within a predetermined landing area, that is, {D- (n-1)} one before or overrun. When {D− (n + 1)} is reached, the actual speed Va = 0 is assumed to have arrived, and the process ends. If it has not arrived, the process is repeated until the process returns to step S19 and arrives at the destination floor.

  As described above, in the elevator repair method according to the first embodiment, the existing hoisting machine 6 of the existing elevator and the existing hoisting motor 10 that drives the hoisting machine 6 are used continuously. A method of repairing an elevator that replaces a control device for controlling the upper motor 10 from an existing control device to a new control device, wherein the actual rated speed Vaf of the car 9 by the new control device is equal to the actual rated speed Vaf by the existing control device. The hoisting motor 10 is controlled so that the nominal rated speed Vrt of the elevator after the modification is changed to 1.11 times the actual rated speed Vaf within the allowable range, and the load capacity C of the car 9 is balanced. In a predetermined balanced loading area (Cb1 to Cb2) including the balanced loading amount Cb that balances the weight 7, the maximum speed Vm of the actual speed Va of the car 9 is set with reference to the nominal rated speed Vrt. The hoisting motor 10 is controlled by the upper limit value Vatt of the actual speed Va, and the maximum speed Vm of the actual speed Va of the car 9 is determined from the capacity of the hoisting motor 10 outside the balanced loading area (Cb1 to Cb2). The hoisting motor 10 is controlled at the ascending / descending speed V, that is, the speed V expressed by the equation (1).

That is, the maximum speed Vm is the upper limit value Vatt of the actual speed Va in the balanced loading area (Cb1 to Cb2). Since the upper limit value Vatt is a value obtained by subtracting the operating margin Vsm from the operating speed of the overspeed switch of the governor, Vatt = 1.11 × 1.3 × Vrt−Vsm. For example, when the nominal rated speed Vrt is 60 m / min and the operating margin Vsm is 5 m / min, the maximum speed Vm in the balanced loading area (Cb1 to Cb2) is about 82 m / min.
For this reason, according to the elevator control apparatus newly established by the renovation work, the transportation capacity is improved and the significance of the renovation work can be enhanced.

Embodiment 2. FIG.
The second embodiment shows an example in which a part of the elevator control device shown in the first embodiment is changed.
Example 1.
FIG. 7 is an explanatory diagram showing the maximum speed Vm of the actual speed Va of the elevator in the first embodiment. As is clear from FIG. 7, the maximum speed Vm outside the balanced loading area (Cb1 to Cb2) is the actual rated speed Vaf, and within the balanced loading area (Cb1 to Cb2), it is higher than the nominal rated speed Vrt, and the upper limit value Vatt. Was set to a lower speed.
For this reason, while improving the transport capability of an elevator, the hoisting electric motor 10, the reduction gear 6a, etc. can be drive | operated at maximum speed Vm with a margin. In particular, in the balanced loading area (Cb1 to Cb2), it is possible to perform an operation with a margin with respect to the upper limit value Vatt.

Example 2
The first embodiment relates to a control device that is newly provided by repairing an elevator. In Example 2, even in a newly installed elevator control device, the same applies, and the elevator transportation capacity is improved by increasing the maximum speed Vm in the same manner as in the first embodiment. Can do.
Example 3
In the first embodiment, the elevator with the speed reducer 6a has been described. However, the same applies to an elevator that does not include the speed reducer 6a. The lifting speed V determined by the capacity of the hoisting motor or the like is shown in FIG. The maximum speed Vm can be increased with respect to the load C.

Explanatory drawing which shows the speed control requirements applied to the elevator control apparatus in Embodiment 1 of this invention. Explanatory drawing which shows transfer of the energy in the drive system of the elevator in Embodiment 1 of this invention. The figure which shows the raising / lowering speed decided from the capability of the hoisting electric motor etc. of the elevator in Embodiment 1 of this invention. Explanatory drawing which shows the maximum speed Vm of the elevator after repair in Embodiment 1 of this invention. 1 is a block diagram showing the overall configuration of an elevator control device in Embodiment 1 of the present invention. The flowchart which shows the production | generation procedure of the speed pattern produced | generated by the control apparatus of the elevator in Embodiment 1 of this invention. The explanatory view which shows the maximum speed Vm of the elevator in Embodiment 2 of this invention. Explanatory drawing which shows the speed control requirements applied to the control apparatus of the conventional elevator.

Explanation of symbols

  1 hoistway, 4 landing, 6 hoisting machine, 6a reduction gear, 7 counterweight, 8 main rope, 9 car, 10 hoisting motor, 10a encoder, 18 car operating panel, 19 scale device, 20 landing button, 21 Next floor stop floor determination device, 22 car position calculation device, 23 lift distance calculation device, 24 maximum speed setting device, 24a load capacity / maximum speed table, 25 speed pattern generator, 25a lift distance / lift speed table, 26 load torque Arithmetic device, 27 inverter control device, 28 inverter device, 29 power supply device.

Claims (4)

  In an elevator hoisting machine in which a car is suspended on one side of a main rope and a counterweight is suspended on the other, and a control device for controlling a hoisting motor that drives the hoisting machine, Among the actual speeds when actually moving up and down driven by the motor, the maximum speed when rising by the rated load capacity is the maximum rated speed determined by the capacity of the hoisting machine or the hoisting motor. In addition to controlling, the nominal rated speed, which is referred to as the rated speed, is set to be higher than the actual rated speed within a predetermined range, and the load capacity of the car includes an equilibrium load capacity that balances the counterweight. In the predetermined equilibrium loading area, the hoisting motor is set so that the maximum speed of the actual speed in the loading area is higher than the nominal rated speed within a range not exceeding an allowable limit determined based on the nominal rated speed. Control and The serial equilibrium loading outside, the control device for an elevator in which the maximum speed of the actual speed is to control the hoisting motor so that the speed is determined from the capacity of the hoisting machine or the hoisting motor.   The elevator control device according to claim 1, wherein the nominal rated speed is 111% of the actual rated speed, and the equilibrium load speed is 125% of the nominal rated speed.   In an elevator repair method in which at least an existing hoisting machine of an existing elevator is to be used continuously, and a control device that controls the hoisting motor that drives the hoisting machine is replaced from an existing control device to a new control device, A repair method using the control device according to claim 1 for the new control device, wherein the actual rated speed of the car by the new control device is equal to the actual rated speed by the existing control device. In addition to controlling the upper motor, the nominal rated speed of the elevator after refurbishment is modified to be higher than the actual rated speed within a predetermined range, and an equilibrium load capacity that balances the load capacity of the car with the counterweight is adjusted. In the specified equilibrium loading area, the nominal rated speed is within a range where the maximum actual speed in the loading area of the car does not exceed the allowable limit set based on the nominal rated speed. The hoisting motor is controlled at a higher equilibrium range speed, and outside the equilibrium loading range, the maximum speed of the actual speed of the car is determined by the capacity of the hoisting machine or the hoisting motor. An elevator repair method for controlling the hoisting motor as described above.   The elevator repair method according to claim 3, wherein the nominal rated speed of the elevator after the repair is 111% of the actual rated speed, and the equilibrium load speed is 125% of the nominal rated speed.

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