JP7204700B2 - Controller for winding drum type elevator - Google Patents

Description

SUMMARY OF THE INVENTION The present invention is a control system for a reel-type elevator, particularly for running the car at an appropriate speed in order to suppress noise.

In order to narrow the hoistway space, etc., home elevators generally employ a winding drum type in which a car is wound around a winding drum with a rope without a counterweight, as described in Patent Document 1 below. . This control device is for changing the operating speed of an elevator, and is basically composed of drive means for driving the elevator to move up and down, speed switching means for switching a specified speed, and driving in accordance with the switching operation of the speed switching means. and speed control means for controlling the speed of the car by the means.

According to the control apparatus for the reel-type elevator, the operating speed of the car can be switched to a speed lower than the rated speed by switching operation of the speed switching means. As a result, the operating speed of the elevator is switched to the above-mentioned low speed in the middle of the night, etc., so that the elevator can be operated quietly, thereby reducing the inconvenience caused by noise to the family and neighboring houses.

JP-A-2-182677

However, in the elevator control device described in Patent Document 1, there is no mention of different speeds for noise suppression on the ascending side and the descending side.
This is because, in a winding drum type elevator employed in a home elevator or the like, in the descending direction, the car descends by its own weight, so that regenerative operation is performed in which a regenerative braking force is generated from the motor. On the other hand, in upward operation, the car-side load must be taken up on the reel of the hoist. Therefore, in the drum-type elevator, the driving capacity is determined based on the rated load in the car in the ascending direction. In order to effectively utilize the driving capacity determined in this way, the rated speed is generally set slower in the ascending direction of the car than in the descending direction, and the noise generated from the elevator on the descending and ascending sides is can differ.
On the other hand, even if the car travels at the rated speed in the ascending direction, the above-mentioned drive capacity may have a margin depending on the presence or absence of passengers in the car and the number of people, and in this respect the drive capacity is not fully utilized. , traveling faster than the rated speed of the car based on the value of the load in the car can make better use of drive power, but can also increase noise.
Under these circumstances, the inventors have sought to limit the maximum speed of the car to be higher than the rated climb speed or It has been found that it is run at a low first speed or at a second speed that is lower than the rated speed on the descent side.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. A drum-type elevator capable of realizing a running speed higher than the rated speed of the elevator according to the load on the car side, and capable of running the car at an appropriate speed in each of the ascending and descending directions in order to suppress noise. It is an object of the present invention to provide a control device for

A control device for a winding drum type elevator according to a first aspect of the invention winds a rope connected to a car on the winding drum and unwinds it to raise or lower the car based on a call signal, and speed pattern In a winding drum type elevator in which a motor is rotated by variable voltage variable frequency means based on a speed command signal from a generating means to drive the winding drum,
When the car is stopped and the car is going to run in the upward direction based on the call signal, a rise signal is generated, and when the car is going to run in the downward direction based on the call signal, the car is going to descend. a traveling direction generating means for generating a signal;
first load detection means for generating a load detection signal according to the load value in the car;
It is determined whether or not the load detection value based on the load detection signal is equal to or less than a predetermined load threshold value, and if it is equal to or less than the load threshold value, a first load ON signal is generated. load determination means for generating a load off signal of 1;
noise setting means for setting a noise suppression level of the elevator;
noise suppression speed setting means for setting a first speed lower than the maximum speed in the upward direction of the car and a second speed lower than the rated speed in the downward direction of the car based on the noise suppression level;
When the noise suppression signal generating means for generating the noise suppression start signal based on the ON signal or OFF signal of the noise suppression start switch means and the descending signal or the first load OFF signal are input, the maximum speed switching OFF signal is generated. a first maximum speed switching means for generating a maximum speed switching ON signal when the rising signal and the first load ON signal are input;
noise suppression speed switching means for generating a noise suppression speed switching ON signal based on the call signal and the noise suppression start signal;
The speed pattern generation means generates a rated speed pattern in which the car travels at a rated speed based on the maximum speed switching off signal, generates a rated speed command signal forming the rated speed travel pattern, and performs the maximum speed switching. generating a first maximum speed traveling pattern in which the car travels in an ascending direction faster than the rated speed by an ON signal, generating a first maximum speed command signal forming the first maximum speed traveling pattern,
Further, a first speed running pattern for running at the first speed is generated based on the noise suppression speed switching ON signal and the rise signal, and a first speed command signal forming the first speed running pattern is generated. occur,
A second speed running pattern for running at the second speed is generated based on the noise suppression speed switching ON signal and the descending signal, and a second speed command signal forming the second speed running pattern is generated. ,
Further, the first maximum speed running pattern is generated based on the load detection signal to determine a maximum speed value for running the car faster than the rated speed, and the first maximum speed running pattern forming the first maximum speed running pattern is generated. generating a maximum speed reference signal,
It is characterized by

According to such a reel-type elevator control device, when the traveling direction generating means attempts to ascend while the car is stopped, the ascending signal is generated, and the load value detected by the first load detecting means corresponds to the load value detected by the first load detecting means. A load detection signal is generated accordingly. The maximum speed switching means generates a maximum speed switching OFF signal when the descent signal or the first load OFF signal is input, and turns on the maximum speed switching when the rising signal and the first load ON signal are input. generate a signal. When the maximum speed switching off signal is input, the speed pattern generating means generates a rated speed running pattern in which the car travels at the rated speed of the car, generates a rated speed command signal, and receives the maximum speed switching on signal. Then, a first maximum speed running pattern for running the car faster than the rated speed of the car is generated and a first maximum speed command signal is generated.
As a result, when the load value in the car becomes higher than the load threshold value, the first load off signal causes the car to run in the upward direction at the rated speed based on the rated speed command signal. On the other hand, when the load value in the car is lower than the load threshold value, the first load-on signal causes the car to travel upward at a maximum speed higher than the rated speed based on the first maximum speed command signal. The maximum speed referred to here is one predetermined value. Therefore, there are two types of speed values for constant traveling in the ascending direction, the rated speed value and the maximum speed value, resulting in a gradual speed increase.

Further, when the noise suppression switching means generates a noise suppression speed switching ON signal based on the call signal and the noise suppression start signal in order to suppress noise at night, etc., the speed pattern generating means generates the noise suppression speed switching ON signal and the noise suppression speed switching ON signal. A first speed running pattern for running at a first speed lower than the maximum speed is generated based on the rise signal, and a first speed command signal forming the first speed running pattern is generated. As a result, the noise caused by the car traveling at the first speed lower than the maximum speed can be appropriately suppressed. Here, in order to sufficiently suppress noise, it is preferable to run the car at a speed lower than the rated speed.
The speed pattern generating means generates a second speed running pattern in which the vehicle runs at a second speed lower than the rated speed based on the noise suppression speed switching ON signal and the descent signal, and the second speed running pattern forming the second speed running pattern. 2 speed command signals are generated. As a result, the car travels at the second speed lower than the rated speed, so noise can be appropriately suppressed.

Here, the rated speed means the speed at which the car travels at a constant speed with the inside of the car under the rated load. Maximum speed means that the car runs faster than the rated speed of the car, regardless of the acceleration at which the car reaches the maximum speed. However, if the acceleration is constant, the velocity generation pattern can be easily formed. In particular, in applications where the rated speed is low, such as home elevators, even if the acceleration is increased, the degree of contribution to the improvement in transport efficiency is low, so there is an advantage in keeping the acceleration constant.
Although the upper limit of the maximum speed value is not particularly defined, the lower the load threshold for switching from the first load-on signal to the first load-off signal, the higher the maximum speed of the car. can.

Here, when the switch is turned on (off) to generate an on signal (off signal), the noise suppression signal generating means generates a noise suppression start signal. The noise suppression start signal may be generated by the clock device based on an on signal or off signal in a set time period, or may be generated based on an on signal or off signal from an external system. Here, the external system can be exemplified by an energy management system that saves energy as a whole including electrical equipment other than the winding drum type elevator. As a result, by operating the car at a speed lower than the rated speed, noise during the late night hours can be reduced.
Further, when the noise suppression canceling means generates a noise suppression canceling signal while the car is stopped, the noise suppression speed switching means generates a noise suppression speed switching OFF signal to switch the car from the speed for noise suppression and can run at maximum speed.

Thereby , the speed pattern generating means obtains a maximum speed value at which the car runs faster than the rated speed of the car based on the load detection signal, and generates a maximum speed running pattern. Therefore, in contrast to the first invention, which has the rated speed and one maximum speed value and increases the maximum speed stepwise, the present invention provides that the load detection signal continuously changes the load value in the car. When the load detection signal increases in proportion to the load value inside the car, the maximum speed value of the car in the ascending direction is increased as the load value inside the car decreases. You can run faster continuously.

A control apparatus for a winding drum type elevator according to a second aspect of the present invention comprises speed detecting means for detecting a speed based on the rotation of the motor and generating a speed detection signal;
speed deviation means for obtaining a speed deviation value that is the difference between the first or second maximum speed command signal and the speed detection signal;
maximum speed limiting means for generating a maximum speed limiting signal when the speed deviation value exceeds a predetermined speed deviation threshold.

As a result, when the speed deviation value exceeds the speed deviation threshold while the car is accelerating according to the maximum speed running pattern, the maximum speed limit means generates a maximum speed limit signal, and the motor is operated by the speed command signal of the previous cycle. Control to keep the car running at a limited maximum speed. As a result, the car stops accelerating and travels at a constant speed, so that the rotation of the motor easily follows the maximum speed command signal. As a result, the speed deviation is also reduced, and the speed control system of the motor can appropriately maintain feedback control, so that the car can run stably.
The maximum speed limiting means may be operated based on turning on of the speed switch means which switches from off to on when the speed detection signal exceeds the rated speed while the car is running upward.

A control method for a reel-type elevator according to a third aspect of the present invention includes trial noise suppression setting means for setting a trial noise suppression level for noise suppression,
Based on the trial noise suppression level, the first trial speed in the ascending direction for traveling the car is set lower than the maximum speed, and the second trial speed in the descending direction is set lower than the rated speed in the descending direction. trial speed setting means for setting slow,
After setting the trial noise suppression level by the trial noise suppression setting means,
a first step of detecting the occurrence of a start trial signal that initiates setting the trial rate;
a second step of determining whether a background noise value is within a predetermined background noise threshold based on the noise detection signal when the car is stationary;
a third step of determining whether the load value based on the load detection signal is equal to or less than a predetermined load threshold;
When the trial start signal is generated and the background noise is within the background noise threshold and is equal to or less than the load threshold, the car is driven at the first or second trial speed, and the noise is detected. a fourth step of detecting a signal;
a fifth step of determining whether or not a noise detection value based on the noise detection signal is equal to or less than a predetermined noise reference value;
If it is equal to or less than the noise reference value, it is determined whether the first or second trial speed exceeds a predetermined minimum reference speed value, and if it exceeds, the first or second trial speed is set. a set speed, and if not exceeded, an incremental speed determined based on the exceeded speed is added to the first or second trial speed as a set speed;
If the noise reference value is exceeded, subtracting the reduced speed from the first or second trial speed and executing the fourth to sixth steps in order;
is preferred.
As a result, if there are three types of trial noise suppression levels, for example, "high", "medium", and "low", the noise for each type can be adjusted according to the trial noise suppression level in the ascending direction of the car during noise suppression. And the constant speed in the downward direction can be easily set.

According to the present invention, the load in the car is detected and the rated speed of the elevator is adjusted according to the load on the car side in order to increase the transportation efficiency in the ascending direction of the elevator without increasing the driving capacity of the power converter or the like. It is possible to provide a control system for a roll-type elevator capable of realizing a higher running speed than the conventional one and capable of running the car at an appropriate speed in each of the ascending and descending directions in order to suppress noise.

1 is an overall view of a drum-type elevator according to an embodiment of the present invention; FIG. FIG. 2 is a block diagram showing a control device for the drum elevator according to FIG. 1; In the control device for the drum type elevator shown in FIG. It is a running curve diagram (b) showing the relationship with time. Running curve diagram (a) showing the relationship between the running speed of the car and time when the maximum speed limit signal is generated in the reel drum type elevator control device shown in FIG. 1, the maximum speed before and after the maximum speed limit signal is generated It is a time chart (b) which shows the relationship between a command signal and time. FIG. 3 is a flow chart showing the operation of the control device when the car of the drum type elevator shown in FIG. 2 is running; FIG. FIG. 6 is a flow chart showing the operation of the control device for the drum-type elevator following the connector A in FIG. 5 ; FIG. FIG. 10 is a block diagram showing a control device for a drum-type elevator according to another embodiment of the present invention, omitting a display; FIG. 8 is a travel curve diagram showing the relationship between the rated speed of the car, the maximum speed, and time in the controller for the reel-type elevator of FIG. 7 ; FIG. 11 is a block diagram of a control device for a reel-type elevator according to another embodiment of the present invention; FIG. 10 is a flow chart showing the operation of the controller for the drum type elevator of FIG. 9; FIG.

Embodiment 1.
One embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. FIG. 1 shows a drum-type elevator according to one embodiment of the present invention. In FIG. 1, a roll-type elevator 1 installed in a private residence or the like has three stops, one end of a rope 5 is connected and fixed to the upper end of a car 3, and a suspension wheel 7 provided at the top of a hoistway. The other end of the rope 5 is connected and fixed to a winding drum 9d of a hoisting machine 9 provided at the bottom of the hoistway. In addition, the winding drum type elevator 1 has a three-phase alternating current motor 11 in which a rotating shaft is connected and fixed to the shaft of the winding drum 9d, and the winding drum 9d can be restrained and released in the hoisting machine 9. A brake 9b is provided.

In the car 3, there is a first load detection device 21 having an input/output characteristic 21a that detects the load of a passenger who has boarded and increases the load detection signal as the output value in proportion to the input value as the load value. There is also provided a car call button 23 for designating a destination floor and for generating a car call signal when pressed. Inside the car 3, there is a voice output function that displays that the car 3 is running at a speed for noise suppression and that the car 3 is running at a restricted maximum speed, and emits a sound. It has a display 600 . Each floor of the hall is provided with hall call buttons 31 to 33 for calling the car 3 to the target hall floor, and is configured to generate a hall call signal when the hall call buttons 31 to 33 are pushed. ing. A platform call signal and a car call signal are collectively referred to as a call signal.

In FIG. 1 , the drum type elevator 1 has an elevator control device 100 that drives and controls a motor 11 . The controller 100 generates a maximum speed switching ON/OFF signal for switching the car 3 between the rated speed and a maximum speed higher than the rated speed, and a noise suppression speed switching signal for running the car 3 at the noise suppression speed. It has a speed switching commander 200 that generates Here, the maximum speed switching ON/OFF signal is called a maximum speed switching signal. Then, when the speed switching signal is input to the motor controller 300 that controls the speed of the motor 11, the motor controller 300 generates a variable AC voltage variable frequency from the power conversion device 500 based on the speed command signal to control the motor 11. drive control. In addition, an encoder 13 is provided to detect the rotational position of the motor 11 and generate a position detection signal, and the position detection signal and the load detection signal are input to the motor controller 300 . The speed switching commander 200 is supplied with a noise suppression start signal for causing the car 3 to run at the noise suppression speed, a noise suppression cancellation signal for canceling the car 3 from running at the noise suppression speed, and a When the car is stopped and tries to move in the ascending direction, a rise signal generated, a load signal based on the load detection signal in the car 3, and a call signal are input.

The motor controller 300 generates a rated speed running pattern in which the car 3 runs at the rated speed in response to the maximum speed switching off signal from the speed switching commander 200, and generates a rated speed command signal that forms this rated speed pattern. , the maximum speed switching ON signal from the speed switching commander 200 forms a maximum speed traveling pattern in which the car 3 travels faster than the rated speed, and generates a maximum speed command signal forming this maximum speed traveling pattern. It is The motor controller 300 has a noise suppression setter 400 for generating a speed setting signal for noise suppression. , and the running speed of the car 3 in the ascending direction and descending direction according to the setting of "high", "medium", and "low". , respectively. Here, "high" means that the noise suppression level is high, and when "high" is selected for the speed of car 3, the speed is the slowest, followed by "medium" and "low" in order of speed of car 3. It's becoming The reason why the noise suppression level is not set according to the noise value or the like is to prevent erroneous setting. When one of "high", "medium", and "low" is set, the first speed lower than the maximum speed in the ascending direction of the car 3 and the descending speed of the car 3 are set to suppress noise. A second speed slower than the rated speed of the direction is set in the speed setting unit.

In FIG. 2, the control device 100 turns on the noise suppression start switch 205s of the noise suppression signal generator 205 to generate a noise suppression start signal. When input, a noise suppression speed switching ON signal is generated, and the car 3 is configured to run at a speed for noise suppression via the motor controller 300 . The noise suppression signal generation unit 205 has a clock function that can set the time zone of the day specified by the calendar and specify this time zone, and will generate the noise suppression start signal only in this time zone. . During this time period, the car 3 can run at a speed for noise suppression. The noise generated from the drive source of the drum type elevator 1 can be reduced, and quietness can be obtained. An off signal is generated outside the set time period.

Further, the noise suppression signal generating section 205 generates a noise suppression start signal based on the ON signal from the external system, and the car 3 can travel at the speed for noise suppression in the same manner as described above. Here, the external system can be exemplified by an energy management system for saving energy in the entire platform including electrical equipment other than the winding drum type elevator 1, specifically HEMS.

The noise suppression release unit 250 generates a noise suppression release signal in response to the ON signal when the noise suppression switch 250s is turned on from off, and when this suppression signal is input to the noise suppression speed switching unit 240, the noise suppression speed switching is turned off. A signal is generated, via the motor controller 300, configured to prevent the car 3 from running at a noise suppressing speed when the car 3 is stationary. The noise suppression canceling unit 250 may generate a noise suppression canceling signal based on an ON signal from a clock or an external system, similarly to the noise suppression signal generating unit 205 . It should be noted that the logic of the ON signal and the OFF signal may be reversed, and if reversed, the noise suppression cancellation signal will be generated based on the OFF signal. The noise suppression speed switching ON signal and the noise suppression speed switching OFF signal are collectively referred to as a noise suppression speed switching signal.

The speed switching commander 200 has a traveling direction generating section 207 for generating a rising signal and a falling signal indicating the traveling direction of the car 3, and a load determination section 209 for generating a load signal. When the speed detection signal and the call signal are input, 207 determines from the speed detection signal that the car 3 is stopped and the call signal indicates that the car 3 is going to run in the ascending direction. When it is determined from the call signal that the car 3 will travel in the downward direction, a descend signal is generated. Here, it can be judged from the call signal and the stop floor of the car 3 that the car 3 is about to ascend or descend.

The load determination unit 209 determines whether or not the load detection value based on the load detection signal is equal to or less than a predetermined load threshold, and generates a first load ON signal when the load detection value is equal to or less than the load threshold, and sets the load threshold. It is configured to generate a first load off signal when exceeded. The maximum speed switching unit 220 generates a maximum speed switching ON signal when the rising signal and the first load ON signal are input, and when one of the first load OFF signal and the falling signal is input, It is configured to generate a full speed switch off signal. The maximum speed switching ON signal and the maximum speed switching OFF signal are collectively referred to as the maximum speed switching signal.

The speed changeover switch 245 selects the maximum speed changeover signal and the noise suppression speed changeover signal ON and inputs them to the speed pattern generator 300. When the noise suppression speed changeover ON signal is generated, the speed changeover switch 245 switches to the a side. When tilted, the noise suppression speed switching ON signal is input to the speed pattern generation unit 303, and when the maximum speed switching signal is generated, the maximum speed switching signal is input to the speed pattern generation unit 303 by tilting to the b side. be done. Here, when both the maximum speed switching signal and the noise suppression speed switching signal are generated, the noise suppression speed switching signal is prioritized and the speed switching switch is turned to the a side.
The first load-on signal and the first load-off signal are collectively referred to as the first load signal.

The motor controller 300 has a position command section 301 for generating a position command signal for traveling from the current position of the car 3 to the position of the destination floor, and the position detection signal from the encoder 13 and the position command signal. A position deviation signal is obtained by a position subtractor ep for obtaining a difference. A speed pattern generation unit 303 receives the input of the position deviation signal and generates a speed running pattern as a speed command signal for the motor 11. Based on the maximum speed switching off signal, the speed pattern generation unit 303 generates the time versus time shown in FIG. A rated speed running pattern is generated as a rated speed running pattern for running the car 3 at the rated speed on the rated speed curve Vn of the speed, and a rated speed command signal forming the rated speed running pattern is generated.

Based on the maximum speed switching ON signal, the speed pattern generation unit 303 causes the car 3 to run at the maximum speed Vh faster than the rated speed in the ascending direction. 3, and generates a maximum speed command signal forming the maximum speed running pattern. Here, the range Vm of the maximum speed value exceeds the rated speed value Vn in the state where the first load ON signal below the load threshold value is generated, and the lower the load detection signal value, the higher the maximum speed value. 3, and is in the range of the maximum speed value VL of the maximum speed. The maximum speed value is determined based on the load detection signal from the first load detection device 21, and the maximum speed of the car 3 increases as the load value inside the car 3 decreases. to generate the maximum speed pattern of
For traveling of the car 3 in the descending direction, the speed pattern generator 303 is configured to generate a rated speed pattern for traveling at the rated speed regardless of the load in the car 3 .

Based on the noise suppression speed switching signal, the speed pattern generating unit 303 generates a speed running pattern for causing the car 3 to run according to the speed running curve of speed vs. time shown in FIG. is configured to generate The first speed running pattern VLu on the ascending side when the car 3 ascends generates a first speed command signal for obtaining a first speed lower than the maximum speed of the car 3 in the ascending direction. The descending second speed running pattern VLd when the car 3 descends sets a second speed command signal for obtaining a second speed lower than the rated speed in the descending direction.
Here, the speed of the noise suppression car 3 is faster in the descending direction than in the ascending direction. This is to make the noise value substantially the same in the ascending direction and descending direction of the car 3 .

The control device 100 obtains a speed detection signal from the position detection signal of the encoder 13 by a differentiator 321, and uses a speed subtractor ev to obtain the difference between this speed detection signal and the maximum speed command signal from the speed pattern generator 303. A speed deviation signal is obtained. The speed control unit 305 is configured to receive an input of the speed deviation signal and generate a current command signal (torque command signal). The torque control unit 307 receives a current deviation signal from a current subtractor ei that obtains the difference between the current detection signal from the current detector 331 that detects the current flowing through the motor 11 and the current command signal. The motor 11 is driven and controlled via the power conversion device 500 by the torque command signal generated.

When the speed detection signal exceeds the rated speed while the car 3 is traveling upward, the maximum speed limiter 335 receives a speed deviation signal by turning on the rated speed switch 333, which switches from off to on. When the speed deviation threshold is exceeded, the maximum speed limit signal VmL is input to the speed pattern generator 303 as shown in FIG. 4(a). As a result, the speed pattern generation unit 303 stops accelerating the car 3 to the maximum speed running, switches to the speed command signal of the previous cycle, and at a constant speed that becomes the maximum speed Vem limited by the speed command signal of the previous cycle. A maximum speed limit pattern for running the car 3 is generated, and a speed command signal forming the maximum speed limit pattern is generated. Here, as shown in FIG. 4(b), in the digital processing, the maximum speed command signal of the current cycle in which the speed deviation value exceeds the speed threshold becomes the maximum speed command signal of the previous cycle.

The display device 600 has a display detection unit 602 and a display unit 604. When the display detection unit 602 detects the noise suppression start signal, the display unit 604 indicates that the car 3 is in noise suppression operation. It is indicated by letters, graphics, etc. Similarly, when the display detection unit 602 detects the noise suppression release signal, the display unit 604 displays characters, graphics, etc., indicating that the car 3 can run at the maximum speed. Similarly, when the display detection unit 602 detects the maximum speed limit signal, the display unit 604 displays characters, graphics, etc., indicating that the car 3 is traveling at the limited maximum speed.

1 to 6, the operation of the control apparatus for the drum-type elevator constructed as described above will be described. 5 and 6 are flow charts showing the operation of the drum type elevator control system according to FIG.
<Operation when the car is traveling at maximum speed>
In FIG. 5, whether or not the landing call buttons 31 to 33 or the car call button 23 has been pressed is determined by the generation of a call signal (step S101). is different, the position command unit 301 sets the position (distance) from the stop floor to the destination floor where the car 3 travels and arrives (step S103). Thereby, the position command section 301 generates a position command signal based on the set position.

The noise suppression speed switching unit 240 determines whether or not the noise suppression canceling signal is input from the noise suppression canceling unit 250 (step S104). It is determined whether or not a start signal has been input (step S105). If the noise suppression start signal is not input, the load determination unit 209 determines whether or not the load in the car 3 is equal to or less than a predetermined load threshold based on the load detection signal from the load detection device 21 (step S107). Below the threshold, a load on signal is generated. The traveling direction generation unit 207 determines whether the car 3 is stopped and is about to travel upward from the destination floor and the current floor of the car 3 (step S109). When the car 3 tries to travel in the upward direction, an upward signal is generated.

While the load detection signal from the load detector 21 is being input, the speed switching commander 200 sends the maximum speed switching ON signal from the maximum speed switching unit 220 to the speed pattern generating unit 303 via the speed switching switch 245. input. As shown in FIG. 3(a), the speed pattern generator 303 generates a maximum speed running pattern in which the maximum speed value of the car 3 is continuously increased as the load value in the car 3 is lower, based on the load detection signal. Generate (step S113). This is because the rated speed of the car 3 in the descending direction is set higher than the rated speed in the ascending direction, so there is no need to make the car 3 faster than the rated speed. Then, the control device 100 releases the brake 9b of the motor 11 (step S115).

Next, in FIGS. 2 and 6, the speed pattern generator 303 generates a maximum speed command signal forming a maximum speed running pattern, and the difference between the speed command signal and the speed detection signal is sent to the speed subtractor ev. When the obtained speed deviation signal is input to the speed control unit 305, the speed control unit 305 generates a current command signal, and the difference from the current detection signal is obtained by the current subtractor ei. input. The torque control unit 307 drives and controls the motor 11 via the power converter 500 to accelerate the car 3 (step S201). Maximum speed limiting unit 335 determines whether the speed deviation value exceeds a predetermined speed deviation threshold value, and if it does not exceed (step S203), speed control unit 305 sets a maximum speed command signal based on the maximum speed command signal. It is determined whether or not the car 3 reaches the maximum speed (step S205).

In FIG. 6, when the car 3 reaches the predetermined maximum speed, the control device 100 continues the maximum speed of the car 3 while running the car 3 at a constant speed at the maximum speed (step S207). Eventually, when the car 3 reaches the deceleration position (step S209), the speed control unit 305 decelerates the car 3 according to the distance to the destination floor (step S211). 100 restrains the brake 9b to brake the hoisting machine 9 and stop the car 3 (step S213).

<Operation when the car is traveling at a speed for noise suppression>
In step S105 of FIG. 5, the noise suppression start signal is input to the noise suppression speed switching unit 240, and when the car 3 tries to run in the ascending direction and a rise signal is generated (step S121), the speed pattern generation unit 303 causes the speed pattern generator 303 to rise. A first speed travel pattern for noise suppression in a direction is generated, and a first speed command signal for noise suppression for ascending which forms the speed travel pattern is generated to drive the car 3 at a speed for noise suppression. Run (step S123). On the other hand, in step S121, when the car 3 is going to travel in the downward direction and a descending signal is generated, the speed pattern generation unit 303 generates a second speed traveling pattern for noise suppression for descending, and this speed traveling is generated. A second speed command signal for noise suppression for descending pattern is generated, and the car 3 travels at the speed for noise suppression (step S125). In response to the generation of the first or second speed command signal for noise, the display unit 600 displays text, voice, or the like on the display unit 604 to the effect that the car 3 is running at the speed for noise suppression (step S127). .

When the car 3 reaches the predetermined speed for noise suppression, the control device 100 causes the car 3 to travel at a constant speed at the speed for noise suppression (step S207). When the noise suppression canceling signal is input to the noise suppression speed switching unit 240 (step S208), the noise suppression switching signal from the noise suppression speed switching unit 240 is turned off, and the speed switching switch 245 is turned to the b side to generate a speed pattern. The unit 303 generates a rated speed running pattern and drives the car 3 at the rated speed according to the rated speed command signal forming this pattern.

<Operation when the maximum speed of the car is limited>
In step S203 of FIG. 6, maximum speed limiter 335 inputs a maximum speed limit signal to speed pattern generator 303 when the speed deviation value exceeds a predetermined speed deviation threshold value. As a result, the speed pattern generator 303 stops accelerating the car 3 to the maximum speed, switches to the speed command signal before the speed deviation value is exceeded (previous cycle), and maintains a constant speed according to the speed command signal of the previous cycle. The car 3 runs at the limited maximum speed (step S223). This is because the actual speed cannot follow the speed command signal for some reason. Then, the speed pattern generator 303 newly generates a maximum speed limit driving pattern as shown in FIG.

The speed control unit 305 drives the motor 11 while generating a speed command signal based on this traveling pattern to cause the car 3 to travel at a constant maximum speed Vem (step S225). In response to the generation of the maximum speed limit signal, the display unit 600 displays characters, voice, etc. on the display unit 604 to the effect that the car 3 is running at the limited maximum speed (step S227), and the car 3 is kept at a constant speed at the limit speed. It runs fast (step S207). As a result, the car stops accelerating and travels at a constant speed, so that the rotation of the motor easily follows the maximum speed command signal. As a result, the speed deviation is also reduced, and the speed control system of the motor can appropriately maintain feedback control, so that the car can run stably.

<Operation when the car is traveling at the rated speed>
As shown in FIG. 5, in step S107, the load detection signal from the load detection device 21 determines whether or not a predetermined load value (threshold value) is exceeded. The car 3 runs at the rated speed according to the speed command signal (step S117). This is because the drive capacity of the motor 11 or the like is exceeded. Further, when it is determined in step S109 that the car 3 is about to travel in the downward direction, the car 3 travels at the rated speed (step S117). This is because the car 3 is traveling in the descending direction at a rated speed higher than the rated speed in the ascending direction.

According to this embodiment, when the noise suppression start signal is input to the noise suppression speed switching unit 240, the car 3 can run at the upward speed and the downward speed for noise suppression. A drum type elevator 1 can be obtained. In addition, control of the reel-type elevator that can run at the rated speed of the elevator 1 or at a running speed faster than the rated speed according to the load on the car 3 side without increasing the driving capacity of the motor 11, the power conversion device 500, etc. A device 100 can be obtained.

Embodiment 2.
Another embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. FIG. 7 is a block diagram showing a control device for a winding drum type elevator according to another embodiment, omitting the display. FIG. 2 is a running curve diagram showing the relationship between time and time. FIG. In FIG. 7, the same reference numerals as in FIG. 2 denote the same parts, and description thereof is omitted.
In FIG. 7, when the load value in the car 3 is equal to or less than a predetermined load threshold value, a second load ON signal is generated at the lower portion of the car 3, and when the load value exceeds the load threshold value, a second load OFF signal is generated. A second load sensing device 521 having a generated second input/output characteristic 521a is provided.
The second control device 1100 has a second speed switching commander 1200, and a second maximum speed switching unit 1220 receives a second load signal as a second load on/off signal. ing. Accordingly, in the present embodiment, the load determination unit 209 shown in FIG. 2 of the control device 100 according to the first embodiment is omitted.

A speed pattern generation unit 1303 generates a rated speed running pattern for running the car 3 at the rated speed based on the maximum speed switching off signal, generates a rated speed command signal forming the rated speed pattern, and generates a maximum speed switching on signal. generates a first maximum speed running pattern in which the car 3 runs faster than the rated speed, and generates a first maximum speed command signal forming the first maximum speed running pattern. The speed pattern generator 1303 further generates a first speed running pattern in which the vehicle runs at the first speed based on the noise suppression speed switching ON signal and the increase signal, and the first speed running pattern forming the first speed running pattern. Generating a speed command signal, generating a second speed running pattern for running at a second speed based on the noise suppression speed switching ON signal and the descending signal, and generating the second speed command forming the second speed running pattern configured to generate a signal.

In this embodiment, as shown in FIG. 8, the rated speed running pattern and the maximum speed running pattern having one maximum running speed value are switched to generate these two types of speed running patterns. On the other hand, in Embodiment 1, as shown in FIGS. Below, the maximum speed of the car 3 is continuously increased based on the load detection signal. As a result, more than the first load detection device 21 of the first embodiment, which continuously detects the load value of the car 3, the second load-on signal or the second load-off signal can be detected with the load threshold as a boundary. The configuration of the second load detection device 521 that generates the force is simple. This eliminates the need for the load determination unit 70 of the first embodiment. Therefore, the configuration of the control device 1100 is simpler than that of the first embodiment.

Embodiment 3.
Another embodiment of the present invention will be described with reference to FIGS. 9 and 10. FIG. FIG. 9 is a block diagram showing a control system for a drum type elevator according to another embodiment. It is a flow chart for running and speed setting. In FIG. 9, the same reference numerals as in FIG. 1 denote the same parts, and the description thereof is omitted.

In FIG. 9, the noise suppression generated from the elevator 1 is controlled according to the trial noise suppression level. It has a retardation speed tester 900 . The noise suppression speed tester 900 turns the trial setting switch 410 of the noise suppression commander 400 from OFF (open) to ON (closed), and selects one of "high", "medium", and "low" of the noise setting section 402. , and a trial noise suppression level signal is input to trial speed section 902 and noise judgment section 906 of noise suppression speed tester 900 . As a result, the trial speed unit 902 sets the first trial speed and the second trial speed, which are constant speeds in the ascending and descending directions, according to the trial noise suppression level, and generates the trial speed command signal. is formed in Here, the first trial speed is set lower than the maximum speed of the car 3 in the upward direction, and the second trial speed is set lower than the rated speed in the downward direction. The trial setting switch 410 and the noise setting section 402 constitute trial noise suppression setting means.

The trial load determination unit 904 is configured to determine whether or not the load detection value based on the load detection signal is equal to or less than a predetermined load threshold, and to generate a trial load ON signal if the load detection value is equal to or less than the load threshold. . This is because the noise value fluctuates depending on the load in the car 3 . It is preferable that the load in car 3 is set to no load. The noise judgment unit 906 is set with a noise reference value according to the trial noise suppression level, and judges whether or not the noise value based on the noise detection signal is within the noise reference value when the car 3 is running. 3 is stopped, it is configured to determine whether the background noise is equal to or less than the background noise threshold. When the trial speed start switch 920 is turned on (closed), the trial load ON signal is input, and the background noise is within the background noise threshold value, the trial transition unit 908 generates a run start signal. A trial speed command signal from 902 is configured to be input to motor controller 300 .

If the noise detection value based on the noise detection detection signal exceeds the noise reference value, the trial speed determination unit 910 sets a new trial speed obtained by subtracting Δvd from the trial speed in the trial speed unit 902, and sets the trial speed in the trial speed unit 902. If the noise detection value based on the signal is equal to or less than the noise reference value, and if the trial speed exceeds the minimum reference speed, the speed setting unit 404 is set. Further, if the new trial speed is equal to or lower than the minimum reference speed value, the trial speed determination unit 910 determines a new speed obtained by adding Δvu to the trial speed based on the difference between the minimum reference speed value and the trial speed. Set in the setting unit 404 .

9 and 10, the operation of the control apparatus for the drum-type elevator constructed as described above will be described. First, while the car 3 is stopped, the trial speed setting switch 410 is turned on (step S301), and one of "high", "medium" and "low" is set in the noise setting section 402. Then, the trial speed unit 902 sets the first trial speed and the second trial speed in the ascending direction and the descending direction, respectively (step S303). When the trial transition unit 908 detects that the trial start switch 910 is turned on from off (step S305 as the first step), the noise determination unit 906 detects that the car 3 is stopped and the background noise is predetermined. A determination is made as to whether the background noise is below the background noise threshold (step S307 as a second step).

If it is equal to or less than the background noise threshold, the trial load determination unit 904 determines whether or not the load in the car 3 is equal to or less than the load threshold (step S309 as a third step). A trial start signal is generated from the section 908, and the car 3 travels downward at the trial speed according to the trial speed command signal from the trial speed setting section 902 (step S311 as the fourth step), and the noise determination section 906 detects the noise detection signal (step S313), judges whether the noise value is equal to or less than a predetermined noise reference value (step S315 as a fifth step), and if it is equal to or less than the noise reference value, the trial speed The judgment unit 903 judges whether the trial speed is equal to or less than the minimum reference speed value based on transportation efficiency (step S317), and if it exceeds the minimum reference speed value, sets the trial speed to the speed setting unit 404 ( Step S319) as a sixth step.

On the other hand, in step S315, if the noise level is not equal to or lower than the noise reference value, the trial speed determination unit 910 determines a new trial speed obtained by subtracting the reduced speed Δvd from the trial speed if it is equal to or lower than the noise threshold value. After execution, the new trial speed is set in the trial speed section 902 as the running speed. Further, in step S315, if it is equal to or less than the minimum reference speed value, the trial determination unit 910 adds the incremental speed Δvu to the trial speed based on the difference between the minimum reference speed value and the trial speed. It is set in the setting unit 404 (step S317 as the sixth step), and the process ends.
According to the present embodiment, if the trial noise suppression level of noise is set to three types of "high", "medium", and "low" as described above, the noise for each type is adjusted according to the trial noise suppression level. The first trial speed in the ascending direction and the descending direction of the car 3 can be set as the first speed, and the second trial speed can be easily set in the speed setting unit 404 as the second speed. Furthermore, by turning on the trial setting switch 410, the noise setting unit 402 can also be used to set a trial noise suppression level for suppressing noise.

The present invention is by no means limited to the description of the embodiments of the invention. Various modifications are also included in the present invention within the range that can be easily conceived by those skilled in the art without departing from the scope of claims. For example, in FIG. 2, the load detection signal does not have to be input to the speed pattern generation section 303 . With this configuration, the configuration is similar to that of the speed pattern generation unit 1303 of the second embodiment. As shown in FIG. 8, the speed pattern generation unit 1303 generates a rated speed pattern when the load threshold is exceeded, and the speed pattern is less than or equal to the load threshold. Then, two types of first maximum speed patterns having one maximum speed value are generated, and a first maximum speed command signal forming the first maximum speed pattern is generated. Therefore, speed pattern generation section 1303 according to this modification has a simpler configuration than speed pattern generation section 303 of the first embodiment.

Also, the function of the speed changeover switch 245 may be provided in the speed pattern generator 303 . When the maximum speed switching signal and the noise suppression speed switching signal are input to the speed pattern generation unit 303 and each signal is input independently, the speed pattern is generated by each signal and the maximum speed switching signal is generated. And when the noise suppression speed switching signal is input, the noise suppression speed switching signal may be prioritized to generate a speed pattern.

2 and 7, the rated speed switch 333 may be omitted and the speed deviation signal may be directly input to the maximum speed limiter 335. FIG. According to this configuration, since the maximum speed limiter 335 generates a maximum speed limit signal when the speed deviation value exceeds the speed deviation threshold from the start of acceleration of the car 3, the speed of the car 3 may become low. In this case, since there is clearly an abnormality, it is preferable that the display detection unit 602 determines that the car 3 has not reached the rated speed based on the speed detection signal, and displays that effect on the display 600 . .

In addition, the noise suppression setting unit 402 sets the noise suppression level in steps of "high", "middle", and "low". , and in the case of continuous setting, the speed setting unit 404 continuously sets the running speed of the car 3 according to the continuous suppression level setting of the noise suppression setting unit 402 . As a result, a fine running speed of the car can be obtained for noise suppression.

REFERENCE SIGNS LIST 1 winding drum type elevator 3 cage 5 rope 9 hoisting machine 9d winding drum 11 motor 13 encoder 21 first load detection device (first load detection means) 100, 1100 elevator control device , 200, 1200 rated speed switching commander 205 noise suppression signal generator (noise suppression signal generator) 205s noise suppression start switch (noise suppression start switch means) 207 traveling direction generator (traveling direction generator) 209 load determination section (load determination means) 220 first maximum speed switching section (first maximum speed switching means) 240 noise suppression speed switching section 303, 1303 speed pattern generation section (speed pattern generation means) 335 maximum speed limiter (maximum speed limiter) 400 noise suppression setter 402 noise setter 404 speed setter 410 trial setting switch 500 power converter (variable voltage variable frequency means) 521 second load detector (second load detection means), 600 display device, 602 display detection section (display detection means), 604 display section (display means), 1220 second maximum speed switching section (second maximum speed switching means), 902 trial speed unit, 904 trial load determination unit, 920 trial speed start switch;

Claims (3)

The rope connected to the car is wound around the winding drum and unwound to raise or lower the car according to the call signal, and the variable voltage variable frequency means according to the speed command signal from the speed pattern generating means. In a winding drum type elevator that drives the winding drum by rotating a motor by
When the car is stopped and the car is going to run in the upward direction based on the call signal, a rise signal is generated, and when the car is going to run in the downward direction based on the call signal, the car is going to descend. a traveling direction generating means for generating a signal;
first load detection means for generating a load detection signal according to the load value in the car;
It is determined whether or not the load detection value based on the load detection signal is equal to or less than a predetermined load threshold value, and if it is equal to or less than the load threshold value, a first load ON signal is generated. load determination means for generating a load off signal of 1;
noise setting means for setting a noise suppression level of the elevator;
noise suppression speed setting means for setting a first speed lower than the maximum speed in the upward direction of the car and a second speed lower than the rated speed in the downward direction of the car based on the noise suppression level;
When the noise suppression signal generating means for generating the noise suppression start signal based on the ON signal or OFF signal of the noise suppression start switch means and the descending signal or the first load OFF signal are input, the maximum speed switching OFF signal is generated. a first maximum speed switching means for generating a maximum speed switching ON signal when the rising signal and the first load ON signal are input;
noise suppression speed switching means for generating a noise suppression speed switching ON signal based on the call signal and the noise suppression start signal;
The speed pattern generation means generates a rated speed pattern in which the car travels at a rated speed based on the maximum speed switching off signal, generates a rated speed command signal forming the rated speed travel pattern, and performs the maximum speed switching. generating a first maximum speed traveling pattern in which the car travels in an ascending direction faster than the rated speed by an ON signal, generating a first maximum speed command signal forming the first maximum speed traveling pattern,
Further, a first speed running pattern for running at the first speed is generated based on the noise suppression speed switching ON signal and the rise signal, and a first speed command signal forming the first speed running pattern is generated. occur,
A second speed running pattern for running at the second speed is generated on the basis of the noise suppression speed switching ON signal and the descending signal, and a second speed command signal forming the second speed running pattern is generated . ,
Further, the first maximum speed running pattern is generated based on the load detection signal to determine a maximum speed value for running the car faster than the rated speed, and the first maximum speed running pattern forming the first maximum speed running pattern is generated. to generate a maximum reference of
A control device for a reel-type elevator characterized by: speed detection means for detecting a speed based on the rotation of the motor and generating a speed detection signal;
speed deviation means for obtaining a speed deviation value that is the difference between the first maximum speed command signal and the speed detection signal;
maximum speed limiting means for generating a maximum speed limiting signal when the speed deviation exceeds a predetermined speed deviation threshold;
2. The controller for a winding drum type elevator according to claim 1 , characterized by comprising: trial noise suppression setting means for setting a trial noise suppression level for noise suppression;
Based on the trial noise suppression level, the first trial speed in the ascending direction for traveling the car is set lower than the maximum speed, and the second trial speed in the descending direction is set lower than the rated speed in the descending direction. trial speed setting means for setting slow,
After setting the trial noise suppression level by the trial noise suppression setting means,
a first step of detecting the occurrence of a start trial signal that initiates setting the trial rate;
a second step of determining whether a background noise value is within a predetermined background noise threshold based on the noise detection signal when the car is stationary;
a third step of determining whether the load value based on the load detection signal is equal to or less than a predetermined load threshold;
When the trial start signal is generated and the background noise is within the background noise threshold and is equal to or less than the load threshold, the car is driven at the first or second trial speed, and the noise is detected. a fourth step of detecting a signal;
a fifth step of determining whether or not a noise detection value based on the noise detection signal is equal to or less than a predetermined noise reference value;
If it is equal to or less than the noise reference value, it is determined whether the first or second trial speed exceeds a predetermined minimum reference speed value, and if it exceeds, the first or second trial speed is set. If the set speed is not exceeded, the incremental speed obtained based on the exceeded speed is set as the first or second trial speed.
a sixth step of setting the speed in addition to the
If the noise reference value is exceeded, subtracting the reduced speed from the first or second trial speed and executing the fourth to sixth steps in order;
3. The control method for a drum type elevator according to claim 1 or 2 , characterized in that:

Images