Elevator star control method, device, system and storage medium

Abstract

The application discloses an elevator star closing control method, device, system and storage medium, relates to the elevator control technical field, and the method comprises the steps of obtaining a stop elevator instruction under different elevator states; determining target parameters of a traction machine according to the stop elevator instruction under different elevator states; continuously monitoring the target parameters, judging whether the target parameters of the traction machine meet star closing trigger conditions, and controlling the traction machine to perform star closing braking when the target parameters meet the star closing trigger conditions. The application solves the problem that the existing elevator star closing control has greater damage to the motor and the motor driver, realizes the effect of reducing the damage of star closing braking to the motor and the motor driver by monitoring the target parameters of the traction machine after the STO action, and triggering star closing when the target parameters meet the star closing trigger conditions.

Description

Technical Field

[0001] The present invention relates to the field of elevator control technology, and in particular to an elevator star-sealing control method, device, system and storage medium. Background Art

[0002] Star-lock braking is a technology that forms a star-shaped loop in the elevator's traction motor circuit, enabling rapid braking. This prevents the elevator from slipping or running away due to inadequate braking in the event of a brake failure. Existing star-lock control methods simultaneously activate STO (Safe Torque Off) and star-lock braking. This approach can trigger star-lock braking at high elevator speeds. The motor's back EMF generates a high current, which can adversely affect both the motor and the motor driver, increasing the probability of motor and motor driver failure over time. Summary of the Invention

[0003] The main purpose of the present invention is to provide an elevator star-sealing control method, device, system and storage medium, aiming to solve the technical problem in the prior art that elevator star-sealing control causes significant damage to the motor and motor driver.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides an elevator star-sealing control method, the method comprising:

[0006] Get elevator stop instructions under different elevator states;

[0007] determining target parameters of the traction machine according to the elevator stop instructions under the different elevator states;

[0008] The target parameters are continuously monitored to determine whether the target parameters of the traction machine meet the star-sealing triggering conditions, and when the target parameters meet the star-sealing triggering conditions, the traction machine is controlled to perform star-sealing braking.

[0009] Optionally, in the above-mentioned elevator star-locking control method, after the step of obtaining the elevator stop instruction under different elevator states, the method further includes:

[0010] The traction machine is controlled to perform a safe torque off action.

[0011] Optionally, in the above-mentioned elevator star-locking control method, the target parameter includes the motor speed of the traction machine and / or the motor displacement of the traction machine after the elevator stops;

[0012] The step of determining the target parameters of the traction machine according to the elevator stop instructions under the different elevator states includes:

[0013] According to the elevator stop instructions under the different elevator states, the motor speed of the traction machine and / or the motor displacement of the traction machine after the elevator stops are determined.

[0014] Optionally, in the above-mentioned elevator star-sealing control method, the different elevator states include a fault state or a normal state;

[0015] The step of determining the motor speed of the traction machine and / or the motor displacement of the traction machine after the elevator stops according to the elevator stop instructions in different elevator states includes:

[0016] When the elevator is in a fault state, determining the motor speed of the traction machine;

[0017] When the elevator is in a normal state, the motor displacement of the traction machine after the elevator stops is determined.

[0018] Optionally, in the above-mentioned elevator star-sealing control method, the step of continuously monitoring the target parameters and determining whether the target parameters of the traction machine meet the star-sealing triggering conditions includes:

[0019] When the elevator is in a fault state, continuously monitoring the motor speed of the traction machine to determine whether the motor speed is less than a preset speed; if the motor speed is less than the preset speed, determining that the star-off triggering condition is met;

[0020] When the elevator is in a normal state, the motor displacement of the traction machine after the elevator stops is continuously monitored to determine whether the motor displacement is greater than a preset displacement. If the motor displacement is greater than the preset displacement, it is determined that the star-sealing trigger condition is met.

[0021] Optionally, in the above-mentioned elevator star-locking control method, the step of controlling the traction machine to perform star-locking braking includes:

[0022] By generating an electronic star-locking trigger signal and sending the electronic star-locking trigger signal to the upper and lower bridge arm switch tubes in the switch module, the traction machine is controlled to perform star-locking braking.

[0023] Optionally, in the above-mentioned elevator star-locking control method, the step of controlling the traction machine to perform star-locking braking includes:

[0024] By generating a contactor control signal and sending the contactor control signal to the star-locking contactor in the switch module, the traction machine is controlled to perform star-locking braking.

[0025] In a second aspect, the present invention provides an elevator satellite sealing control device, which includes a processor and a memory. The memory stores an elevator satellite sealing control program. When the elevator satellite sealing control program is executed by the processor, the elevator satellite sealing control method as described above is implemented.

[0026] In a third aspect, the present invention provides an elevator star-sealing control system, the system comprising:

[0027] A control module is used to implement the elevator star-locking control method described above and output a safe torque-off signal and a star-locking trigger signal;

[0028] a logic processing module connected to the control module, configured to perform logic processing on the safe torque off signal and the star-sealing trigger signal, and output a level signal;

[0029] a driving module, connected to the logic processing module, configured to generate a driving signal according to the level signal and output the driving signal;

[0030] The switch module is connected to the drive module and the traction machine respectively, and is used to control the action of the upper and lower bridge arm switches or the action of the star-closing contactor according to the drive signal to control the traction machine to achieve star-closing braking.

[0031] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by one or more processors, the elevator star-sealing control method as described above is implemented.

[0032] The above one or more technical solutions provided by the present invention may have the following advantages or at least achieve the following technical effects:

[0033] The present invention proposes an elevator star-locking control method, device, system, and storage medium. After obtaining stop instructions under different elevator states, the method determines the target parameters of the traction machine based on the stop instructions under different elevator states, continuously monitors the target parameters, determines whether the target parameters meet the star-locking trigger conditions, and finally controls the traction machine to perform star-locking braking when the target parameters meet the star-locking trigger conditions. This achieves the purpose of triggering star-locking when the star-locking trigger conditions are met to avoid damage to the motor and motor driver. The present invention adjusts the elevator star-locking action sequence, monitors the target parameters of the traction machine after the STO action, and triggers star-locking when the target parameters meet the star-locking trigger conditions. This avoids star-locking during high-speed elevator operation, reduces damage to the motor and motor driver caused by star-locking braking, and thus reduces the failure probability of the motor and motor driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these provided drawings without paying any creative work.

[0035] Figure 1 This is a flow chart of the first embodiment of the elevator star-sealing control method of the present invention;

[0036] Figure 2 This is a hardware structure diagram of the elevator star-sealing control device involved in the present invention;

[0037] Figure 3 This is a timing diagram of the satellite sealing control method in the prior art;

[0038] Figure 4 This is a timing diagram of the first implementation method in the second embodiment of the elevator star-sealing control method of the present invention;

[0039] Figure 5 This is a timing diagram of the second implementation method of the second embodiment of the elevator star-sealing control method of the present invention;

[0040] Figure 6 This is a functional module diagram of the elevator star-sealing control system according to the present invention;

[0041] Figure 7 for Figure 6 A circuit diagram of another embodiment of the switch module.

[0042] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0044] It should be noted that in the present application, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or system that comprises a list of elements does not only include those elements, but can also include other elements not expressly listed or inherent to such process, method, article or system. Without further limitation, the elements defined by the phrase "comprise" do not exclude the presence of additional identical elements in the process, method, article or system that includes the element. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions, for example, "A and / or B" includes A solution, or B solution, or A and B solutions. In the present application, unless otherwise specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate media; can be internal communication of two elements, or interaction relationship between two elements. In the present application, the suffix such as "module", "component" or "unit" used to represent elements is only for the convenience of the description of the present application, and has no specific meaning. Therefore, "module", "component" or "unit" can be used mixedly. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical solutions of various embodiments can be combined with each other, but it is based on the fact that the skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed by the present application.

[0045] Star braking is a technology that forms a star circuit of the hoisting machine circuit of the elevator to brake quickly, which can avoid the phenomenon of elevator slipping or flying caused by the elevator braking failure when the elevator brake fails. As shown in Figure 3 The timing diagram of the star control method in the prior art is shown, in which the horizontal axis represents time, and the vertical axis represents the triggering (ON) or stopping (OFF) of the related signals. It is found that, Figure 3 At the same time, the STO signal is low, and the electronic star signal is high, indicating that the STO (Safe Torque Off) action and the star braking are performed simultaneously. After stopping the torque output, the star immediately acts, realizing the interlocking in time sequence, and achieving the effect of star braking. The problem of this mode is that it will cut into the star at high speed of the elevator. At this time, due to the large current formed by the back electromotive force of the motor, it is easy to cause adverse effects on the motor and the motor driver, which will increase the failure probability of the motor and the motor driver in the long run.

[0046] Given the technical problem of significant damage to motors and motor drivers in existing elevator star-blocking control technologies, the present invention provides an elevator star-blocking control method, an elevator star-blocking control device, an elevator star-blocking control system, and a computer-readable storage medium. The elevator star-blocking control method, device, system, and storage medium provided by the present invention are described in detail below through specific embodiments and implementations, with reference to the accompanying drawings.

[0047] Example 1

[0048] Reference Figure 1 The flow chart of FIG. 1 is a flow chart showing a first embodiment of the elevator star-sealing control method of the present invention, which can be applied to an elevator star-sealing control device.

[0049] Elevator star-sealing control equipment refers to terminal equipment that can achieve network connection or control devices that can achieve signal transmission. It can be terminal equipment such as portable computers, embedded industrial computers, or control devices such as processors and controllers.

[0050] like Figure 2 FIG. 1 is a schematic diagram of the hardware structure of an elevator satellite-sealing control device. The elevator satellite-sealing control device may include: a processor 1001 , such as a CPU (Central Processing Unit), a communication bus 1002 , a user interface 1003 , a network interface 1004 , and a memory 1005 .

[0051] Specifically, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 is used to connect to the client and communicate data with the client, and the user interface 1003 may include an output unit and an input unit; the network interface 1004 is used to connect to the backend server and communicate data with the backend server, and the network interface 1004 may include an input / output interface; the memory 1005 is used to store various types of data, which may include, for example, instructions for any application or method in the elevator star sealing control device, as well as data related to the application, and the memory 1005 may be a built-in memory; optionally, the memory 1005 may also be a storage device independent of the processor 1001, and further reference is made to Figure 2 The memory 1005 may include an operating system, a network communication module, a user interface module, and an elevator satellite sealing control program; the processor 1001 is used to call the elevator satellite sealing control program stored in the memory 1005 and perform the following operations:

[0052] Get elevator stop instructions under different elevator states;

[0053] Determine the target parameters of the traction machine according to the stop instructions under different elevator states;

[0054] Continuously monitor the target parameters to determine whether the target parameters of the traction machine meet the star-sealing triggering conditions. When the target parameters meet the star-sealing triggering conditions, control the traction machine to perform star-sealing braking.

[0055] Based on the above elevator star sealing control equipment, the following is combined with Figure 1 The flow chart shown in the figure describes in detail the elevator star-blocking control method of this embodiment. The method may include the following steps:

[0056] Step S100: Obtain elevator stop instructions under different elevator states.

[0057] The elevator stop command is a command generated under different elevator states. For example, it can be a command generated when the elevator stops at a floor during normal operation, or it can be a command generated based on a fault after a fault occurs during the operation of the elevator. The command generation process can be generated in the elevator star-sealing control device, or it can be generated by an external main control device and sent to the elevator star-sealing control device. The specific setting is based on actual needs. In actual applications, when the device generates a stop command under different elevator states or receives a stop command under different elevator states, the STO signal is immediately set to low or the output of the STO signal is stopped, and the STO action is executed, such as Figure 4 and Figure 5 The timing diagram shows the timing changes of the STO signal. At this time, the star-locking control method has only obtained the elevator stop instruction and has not yet started to execute the star-locking braking.

[0058] Step S300: Determine target parameters of the traction machine according to the elevator stop instructions under different elevator states.

[0059] The traction machine, as the main engine for the traction elevator, can be a permanent magnet synchronous motor, represented by M. After the elevator's star-locking control device receives the elevator stop command, it can obtain the target parameters of the traction machine in real time while executing the elevator stop action. The target parameters can be one or more parameters such as motor speed, motor displacement, motor acceleration, etc. In this embodiment, the simultaneous acquisition of motor speed and motor displacement is used as an example for explanation. It can be seen that when the elevator executes the elevator stop action, the motor speed will gradually decrease. The motor displacement can be calculated from the moment the elevator stop command is received, or it can be calculated again when the motor stops rotating, so that the elevator slipping can be detected through the parameter changes of the motor displacement, thereby executing the star-locking brake to ensure the safety of people in the elevator. In this embodiment, the motor displacement after the elevator stops is used as an example for explanation.

[0060] In this embodiment, when the target parameters are the motor speed of the traction machine and the motor displacement after the elevator stops, the target parameters of the traction machine are determined specifically by obtaining the motor speed of the traction machine in real time. In actual applications, before the elevator stops, the speed gradually decreases. After the speed drops to zero, the elevator stops, and then the motor displacement after the elevator stops can be obtained in real time.

[0061] Step S500: continuously monitor the target parameter, determine whether the target parameter of the traction machine meets the star closing trigger condition, and control the traction machine to perform star closing braking when the target parameter meets the star closing trigger condition.

[0062] The star closing trigger condition is determined according to the target parameter. When the target parameter is the motor speed, a minimum speed can be determined as the preset speed. When the target parameter is the motor displacement, a maximum displacement can be determined as the preset displacement. Similarly, when the target parameter is the motor acceleration, a threshold value can be determined as the preset acceleration. The elevator star closing control device continuously monitors the target parameter, and determines whether the target parameter meets the star closing trigger condition based on the target parameter each time the target parameter is obtained. Specifically, when the value of the target parameter changes over time and is less than the set minimum value or greater than the set maximum value, it is determined that the star closing trigger condition is met. Otherwise, the target parameter is continuously obtained, and if the star closing trigger condition is not met, no processing is performed. When there are multiple target parameters, the star closing trigger condition can be determined based on one of the target parameters, or the star closing trigger condition can be determined based on multiple target parameters as long as one of the target parameters meets the condition.

[0063] In this embodiment, the motor speed of the traction machine is obtained in real time, and the motor displacement is obtained in real time after the elevator stops. A real-time changing motor speed value and a real-time changing motor displacement value are obtained. In this process, the obtained motor speed is compared with the preset speed, and the obtained motor displacement is compared with the preset displacement. In actual application, the speed decreases to zero before the elevator completely stops, and the motor displacement is not detected at this time. After the elevator stops, the motor displacement is detected in order to timely detect the occurrence of the elevator sliding phenomenon, and the motor speed is continuously detected in real time. In this process, after the stop command is obtained, when the detected motor speed gradually decreases to the preset speed, it is determined that the star closing trigger condition is met, and star closing braking is performed. At this time, there is no detection and determination of the motor displacement. If sliding occurs thereafter, the speed may gradually increase. Initially, star closing braking is still performed, but if the motor speed exceeds the preset speed, the star closing braking signal is low, and star closing braking cannot be continued. At this time, there is not only the motor speed as a target parameter, but also the motor displacement after the elevator stops. Whether the star closing trigger condition is met is determined based on the motor speed and the motor displacement after the elevator stops. At this time, even if the motor speed is not less than the preset speed, when the motor displacement gradually increases and exceeds the preset displacement, it is still determined that the star closing trigger condition is met, and star closing braking is performed again. That is, the star closing trigger condition in this embodiment is that the motor speed is less than the preset speed or the motor displacement after the elevator stops is greater than the preset displacement.

[0064] When the target parameters are determined to meet the star-locking trigger conditions, the elevator star-locking control device controls the traction machine to perform star-locking braking. The specific process can be that the device generates a star-locking trigger signal or immediately sets the star-locking trigger signal to high. The star-locking trigger signal can pass through the motor driver composed of a logic processor, a frequency converter, etc. and then reach the switch tube that drives and controls the traction machine or the star-locking trigger connected to the traction machine, controlling the switch tube to conduct or the star-locking contactor to turn on, thereby driving the traction machine to perform star-locking braking, such as Figure 4 and Figure 5 The timing diagram shows the timing changes of the star-sealing trigger signal.

[0065] The elevator star-lock control method provided in this embodiment obtains stop commands under different elevator states, determines the target parameters of the traction machine based on the stop commands under different elevator states, continuously monitors the target parameters to determine whether the target parameters meet the star-lock triggering conditions, and finally controls the traction machine to perform star-lock braking when the target parameters meet the star-lock triggering conditions. This achieves the purpose of triggering star-lock braking when the star-lock triggering conditions are met to avoid damage to the motor and motor driver. By adjusting the elevator star-locking action sequence, the present invention monitors the target parameters of the traction machine after the STO action, and triggers star-lock braking only when the target parameters meet the star-lock triggering conditions, avoiding star-locking action during high-speed elevator operation, reducing damage to the motor and motor driver caused by star-lock braking, and thus reducing the failure probability of the motor and motor driver.

[0066] Example 2

[0067] Based on the same invention concept, Figure 4 to Figure 7 , a second embodiment of the elevator star-sealing control method of the present invention is proposed. The elevator star-sealing control method can be applied to elevator star-sealing control equipment and can also be applied to elevator star-sealing control systems. This embodiment is described by taking the application to the elevator star-sealing control system as an example. Figure 6 The figure shows the functional modules of the elevator star-sealing control system. The elevator star-sealing control system may include:

[0068] The control module is used to implement the elevator star-sealing control method of this embodiment.

[0069] Therefore, the elevator star-sealing control method of this embodiment is described in detail below, taking the elevator star-sealing control method specifically applied to the control module of the elevator star-sealing control system as an example. The method may include the following steps:

[0070] Step S100: Obtain elevator stop instructions under different elevator states.

[0071] Among them, different elevator states may include a fault state or a normal state. Correspondingly, the stop instructions under different elevator states include a stop instruction under a fault state or a stop instruction under a normal state.

[0072] In actual application, there is more than one reason for the elevator to stop. There may be an operation fault that requires the elevator to stop, a normal operation that requires the elevator to stop at a certain floor, etc. For example, when the fault detection module detects an operation fault during the operation of the elevator, it outputs a fault stop signal to the control module, so that the control module generates a corresponding stop command, or the fault detection module directly outputs a stop command containing the fault stop signal to the control module, wherein the fault detection module does not Figure 6 As shown in FIG, this may be a module added to the elevator star-sealing control system to which the method is applied, or a module in another system outside of the system, such as an elevator operation control system or a fault detection system. For another example, when an elevator needs to stop at a certain floor during operation, the other external system outputs a normal stop signal to the control module, causing the control module to generate a stop command containing the normal stop signal, or the other external system directly outputs a stop command containing the normal stop signal to the control module.

[0073] In the first embodiment, the control module obtains an elevator stop instruction in a fault state.

[0074] In the second embodiment, the control module obtains the elevator stop instruction in a normal state.

[0075] Step S200: Control the traction machine to perform a safe torque off operation.

[0076] After the control module receives the elevator stop command, it can directly control the traction machine to perform the safe torque off (STO) action according to the elevator stop command, regardless of the type of elevator stop command. The specific implementation process is as follows: Figure 6 The control module generates a PWM (Pulse Width Modulation) signal according to the elevator stop command and sends it to the signal processing module. The signal processing module converts the PWM signal into an STO signal and sends it to the logic processing module. The logic processing module generates a corresponding level signal, which passes through the optocoupler isolator in the drive module and reaches the switch tube of the switch module to control the switch tube to turn on or off to control the traction machine to perform the STO action. Figure 4 The timing diagram shown and Figure 5 In the timing diagram shown in FIG, the horizontal axis represents time, and the vertical axis represents the triggering (ON) or stopping (OFF) of the relevant signal, or represents the target parameter and the relevant preset parameter. Figure 4 and Figure 5 At time T1 in the figure, the STO signal is set to low, and the traction machine performs the STO action. At this time, the star-locking trigger signal has not been generated and cannot be interlocked with the STO signal. Different from the existing technology, the traction machine here only performs the STO action but does not perform the star-locking braking.

[0077] Step S300: Determine target parameters of the traction machine according to the elevator stop instructions under different elevator states.

[0078] The target parameters may include the motor speed of the traction machine and / or the motor displacement of the traction machine after the elevator stops. Correspondingly, step S300 may include:

[0079] Step S310: determining the motor speed of the traction machine and / or the motor displacement of the traction machine after the elevator stops according to the elevator stop instructions under different elevator states.

[0080] In the first embodiment, the elevator stop instruction is a stop signal in a fault state. Correspondingly, step S310 includes:

[0081] Step S311: When the elevator is in a fault state, the motor speed of the traction machine is determined.

[0082] Upon receiving a fault-induced elevator stop command, the control module acquires the traction machine's motor speed in real time. Specifically, the motor's encoder can be used to detect the motor's real-time speed, and the detected motor speed is sent to the control module in real time, allowing the control module to obtain the target parameter, i.e., the motor speed, in real time. It should be noted that in this embodiment, this solution is not activated when the elevator is operating normally without faults. It is only activated when the elevator stops due to a fault. This simplifies the complexity of the elevator's operating program and avoids the execution of multiple control programs each time the elevator stops, which would otherwise consume excessive equipment resources.

[0083] In the second embodiment, the elevator stop instruction is a stop signal in a normal state. Correspondingly, step S310 includes:

[0084] Step S312: When the elevator is in a normal state, determine the motor displacement of the traction machine after the elevator stops.

[0085] After obtaining the elevator stop instruction under normal conditions, the control module controls the traction machine to stop rotating, the elevator stops, and the motor speed returns to zero. Then, the control module obtains the motor displacement of the traction machine after the elevator stops in real time. Specifically, the real-time displacement of the motor can be detected by the rotation of the motor, and the detected motor displacement is sent to the control module in real time so that the control module can obtain the target parameter, i.e., the motor displacement after the elevator stops, in real time. It should be noted that in this embodiment, before the elevator stops normally during operation, the scheme is not started, and is only started when the elevator stops normally. This is because if displacement occurs after the elevator stops, it means that there is an abnormality in the elevator brake and the elevator has slipped, and the star-lock brake is required to ensure the safety of people in the elevator. Therefore, this embodiment can improve the safety of normal operation of the elevator.

[0086] In the third embodiment, the motor speed of the hoisting machine and the motor displacement of the hoisting machine after the elevator stops are determined according to the stop command in any state of the elevator.

[0087] Unlike the limitations on elevator status in the first embodiment and the second embodiment, this embodiment does not restrict the specific elevator status. As long as the control module receives a stop command, it can obtain the motor speed of the traction machine and the motor displacement of the traction machine after the elevator stops in real time based on the stop command. For example, if the elevator stops normally, the motor speed will be continuously monitored in real time, and the motor displacement will also be monitored after the elevator stops. This embodiment not only ensures the safety of the elevator before it completely stops, but also ensures the safety of the elevator after it stops, providing higher safety.

[0088] Step S500: continuously monitor the target parameters to determine whether the target parameters of the traction machine meet the star-locking triggering conditions. When the target parameters meet the star-locking triggering conditions, control the traction machine to perform star-locking braking.

[0089] The trigger condition for star-off is determined based on the target parameter. When the target parameter is motor speed, the trigger condition may be that the motor speed is less than a preset speed; when the target parameter is motor displacement after stopping, the trigger condition may be that the motor displacement is greater than a preset displacement; when the target parameters are motor speed and motor displacement after stopping, the trigger condition may be that the motor speed is less than a preset speed or the motor displacement is greater than a preset displacement.

[0090] Specifically, step S500 may include:

[0091] Step S510: continuously monitoring the target parameters to determine whether the motor speed is less than a preset speed and / or whether the motor displacement is greater than a preset displacement;

[0092] Step S520: If the motor speed is less than the preset speed or the motor displacement is greater than the preset displacement, it is determined that the star-off triggering condition is met.

[0093] In the first embodiment, step S500 specifically involves continuously monitoring the motor speed of the traction machine when the elevator is in a fault state, determining whether the motor speed is less than a preset speed, and if the motor speed is less than the preset speed, determining that the shutdown trigger condition is met. The preset speed can be set according to actual needs.

[0094] In the first embodiment, the action timing of the star-sealing brake is strongly related to the motor speed. The star-sealing brake is performed only after the motor speed is lower than the preset speed. Not only is the action timing of the star-sealing brake adjusted to after the STO action, but the back electromotive force generated due to the low speed is also small, which can form a smaller current, thereby reducing damage to hardware equipment such as the traction machine and the motor driver.

[0095] In the second embodiment, the step S500 specifically comprises: when the state of the elevator is the normal state, continuously monitoring the motor displacement of the hoisting machine after the elevator is stopped, and determining whether the motor displacement is greater than a preset displacement; if the motor displacement is greater than the preset displacement, it is determined that the star seal triggering condition is met. The preset displacement can be set according to actual needs.

[0096] In the second embodiment, the action timing of the star seal braking is strongly related to the state of the elevator and the motor displacement after the elevator is stopped. When the motor displacement exceeds the preset displacement, it indicates that the elevator has obviously rolled under the condition of stopping, and if it is allowed to continue to roll, it may cause a safety accident. Therefore, the star seal braking can be performed at this time. In this case, the action timing of the star seal braking is also adjusted to after the STO action.

[0097] In the third embodiment, the step S500 specifically comprises: when the state of the elevator is any one of the fault state or the normal state, continuously monitoring the motor speed of the hoisting machine and the motor displacement of the hoisting machine after the elevator is stopped, determining whether the motor speed is less than a preset speed and simultaneously determining whether the motor displacement is greater than a preset displacement, performing the synchronous determination step for the case that the target parameters include the two target parameters of the continuously detected motor speed and the motor displacement after the elevator is stopped, and if the motor speed is less than the preset speed or the motor displacement is greater than the preset displacement, it is determined that the star seal triggering condition is met.

[0098] During the stopping process, although the target parameter of the motor displacement after the stopping has not been obtained, the target parameter of the motor speed is obtained. At this time, whether the star seal triggering condition is met can be determined according to the motor speed, so as to perform the star seal braking. However, if the motor brake is abnormally locked after the stopping, and the speed starts to increase, since the target parameter of the motor displacement after the stopping has been obtained, the target parameters obtained at this time are two, and the determination also needs to be performed on the two parameters. However, since the speed has not increased to above the preset speed, the star seal braking is still continued. Subsequently, if the motor speed suddenly increases to above the preset speed, the previously maintained star seal braking will no longer be continued. At this time, the determination is also performed on the two parameters, but only the motor displacement plays a role. Once the motor displacement exceeds the preset displacement, the star seal braking can be re-performed.

[0099] When the control module determines that the star seal triggering condition is met, a star seal triggering signal can be generated, and the star seal braking of the hoisting machine is controlled through the star seal triggering signal. The specific implementation process is as follows: Figure 6The functional module diagram of the elevator star-sealing control system is shown. In addition to the control module that executes the elevator star-sealing control method of this embodiment, the elevator star-sealing control system also includes a signal processing module connected to the control module, a logic processing module connected to the signal processing module and the control module, a drive module connected to the logic processing module, and a switch module connected to the drive module. The switch module is connected to the traction machine; the control module can output a safe torque off signal (STO signal) based on step S200, and generate a star-sealing trigger signal based on step S500, and send the safe torque off signal and the star-sealing trigger signal to the logic processing module, and the logic processing module implements the STO signal. The logic processing of the star-sealing trigger signal generates a corresponding level signal and outputs it to the drive module. An optocoupler isolator is set in the drive module. The drive signal is generated according to the received level signal and outputs the drive signal to the switch module to control the switch tube or the star-sealing contactor in the switch module, control the action of the upper and lower bridge arm switch tubes or the star-sealing contactor, so that the three-phase winding line of the traction machine is short-circuited, and an independent electrical circuit is formed inside it. An induced current is generated in the motor winding circuit. At the same time, an electromagnetic torque for braking is generated under the action of the magnetic field of the motor permanent magnet, realizing the star-sealing braking of the traction machine, thereby preventing the elevator from slipping or flying due to power failure of the traction machine.

[0100] like Figure 4 and Figure 5 At time T2 in the figure, the STO signal remains low, generating a star-locking trigger signal that goes high in the timing diagram, indicating that the star-locking brake is engaged. This star-locking trigger signal is interlocked with the STO signal. Unlike existing technologies, this approach achieves the effect of first executing the STO action and then executing the star-locking brake after the star-locking conditions are met.

[0101] Depend on Figure 4 It can be seen that, corresponding to the first implementation mode of this embodiment, after obtaining the elevator stop command under the elevator fault state, the STO action can be triggered immediately, but the star is not locked at this time. The motor speed is detected. When it is detected that the motor speed drops to the preset speed, the star is triggered and the star locking brake is performed to stop the elevator.

[0102] Depend on Figure 5 It can be seen that corresponding to the second implementation mode of this embodiment, after obtaining the stop command of the elevator in the normal state, the STO action can be triggered immediately, but the star is not locked at this time until the elevator stops. In order to prevent the elevator from slipping, the motor displacement is detected. When it is detected that the motor displacement after the elevator stops reaches the preset displacement, the star is triggered and the star braking is performed to stop the elevator again.

[0103] In one embodiment, the step S500 of “controlling the traction machine to perform star-locking braking” may include:

[0104] Step S500a: Generate an electronic star-blocking trigger signal and send the electronic star-blocking trigger signal to the upper and lower bridge arm switch tubes in the switch module to control the traction machine to perform star-blocking braking.

[0105] like Figure 6 As shown, the switch module includes 6 switching tubes, namely IGBT tubes Q1 to Q6. The collectors of Q1, Q2 and Q3 are all connected to the DC bus DC+, the emitter of Q1 is respectively connected to the w phase of the three-phase winding of the traction machine and the collector of Q4, the emitter of Q2 is respectively connected to the v phase of the three-phase winding of the traction machine and the collector of Q5, the emitter of Q3 is respectively connected to the u phase of the three-phase winding of the traction machine and the collector of Q6, the emitter of Q4, Q5 and Q6 are all connected to the DC bus DC-, and at the same time, the gates of Q1 to Q6 are all connected to the drive module.

[0106] In this embodiment, the star-sealing trigger signal output by the control module is specifically an electronic star-sealing trigger signal, which is sent to the logic processing module. The logic processing module can specifically generate a high-level signal PWMH and a low-level signal PWML, which reach the switch tube of the switch module after passing through the optocoupler isolator. The high-level signal PWMH can specifically reach the upper bridge arm switch tube of the switch module, for example Figure 6 In the IGBT tubes Q1, Q2 and Q3, the low-level signal PWML can specifically reach the lower arm switch tube of the switch module, for example Figure 6 The IGBT tubes Q4, Q5 and Q6 in the switch module cause the IGBT tubes of the upper bridge arm to be disconnected at the same time, and the IGBT tubes of the lower bridge arm to be closed at the same time, and the lower three bridges of the switch module are turned on, thus forming a star-sealing circuit.

[0107] In this embodiment, the elevator adopts an electronic star-locking solution, which directly controls the switching tube in the switch module to be turned on or off to realize the star-locking braking of the traction machine.

[0108] In another embodiment, the step S500 of “controlling the traction machine to perform star-locking braking” may include:

[0109] Step S500b: generating a contactor control signal and sending the contactor control signal to the star-locking contactor in the switch module to control the traction machine to perform star-locking braking.

[0110] Specifically, another embodiment of the switch module is as follows: Figure 7 The circuit diagram of the switch module is shown as follows. Figure 6The switch module includes not only 6 switching tubes, but also a running contactor SW and a star-off contactor FX; wherein, the 6 switching tubes are IGBT tubes Q1 to Q6, the collector of Q1, the collector of Q2 and the collector of Q3 are all connected to the DC bus DC+, the emitter of Q1 is respectively connected to one end of the running contactor SW and the collector of Q4, the emitter of Q2 is respectively connected to one end of the running contactor SW and the collector of Q5, and the emitter of Q3 is respectively connected to the running contactor One end of the contactor SW is connected to the collector of Q6, and the emitters of Q4, Q5 and Q6 are all connected to the DC bus DC-. At the same time, the gates of Q1 to Q6 are all connected to the drive module; the running contactor SW is a linkage switch, and its other end is respectively connected to the u phase, v phase and w phase of the traction machine. One end of the star-sealing contactor FX is connected in parallel, and the other end is also respectively connected to the u phase, v phase and w phase of the three-phase winding of the traction machine. The star-sealing contactor FX is also a linkage switch.

[0111] In this embodiment, the star-sealing trigger signal output by the control module is specifically a contactor control signal. After passing through the logic processing module and the drive module, it reaches the switch module, specifically the star-sealing contactor FX in the switch module. It is kept in an open state through the IGBT tubes Q1 to Q6, the operating contactor SW is disconnected, and the star-sealing contactor FX is closed, thereby forming a star-sealing circuit.

[0112] In this embodiment, the elevator adopts a star-locking contactor solution, and the star-locking braking of the traction machine is achieved by controlling the switch of the star-locking contactor in the switch module.

[0113] For more implementation details of the specific implementation of the above method steps, please refer to the description of the specific implementation in Example 1. For the sake of brevity of the description, they will not be repeated here.

[0114] In the elevator star-locking control method provided in this embodiment, the star-locking braking action sequence is not strongly correlated with the STO action sequence. Even if the STO action cuts off the current that drives the motor, the star-locking braking action may not necessarily be activated. By delaying the star-locking braking action after the STO action and adjusting the star-locking braking action sequence, the star-locking action during high-speed operation of the elevator is avoided, thereby reducing the failure probability of the motor and motor driver, thereby increasing the service life of the elevator driver or star-locking contactor and reducing the failure rate while meeting the standards. The star-locking braking method also implements three different implementation schemes. When performing specific star-locking braking, it can be applied to both elevator scenarios using electronic star-locking and elevator contactor, thus having a wide range of applications.

[0115] Example 3

[0116] Based on the same invention concept, Figure 2Schematic diagram of the hardware structure, this embodiment provides an elevator star-sealing control device, which may include a processor and a memory. The memory stores an elevator star-sealing control program. When the elevator star-sealing control program is executed by the processor, all or part of the steps of each embodiment of the elevator star-sealing control method of the present invention are implemented.

[0117] Specifically, the elevator star-sealing control device refers to a terminal device that can achieve network connection or a control device that can achieve signal transmission. It can be a terminal device such as a portable computer, an embedded industrial computer, or a control device such as a processor or a controller.

[0118] It can be understood that the elevator star-sealing control device may further include a communication bus, a user interface and a network interface. Among them, the communication bus is used to realize the connection and communication between these components; the user interface is used to connect to the client and communicate data with the client. The user interface may include an output unit such as a display screen, a speaker, etc., and an input unit such as a keyboard, a microphone, etc.; the network interface is used to connect to the background server and communicate data with the background server. The network interface may include an input / output interface, such as a standard wired interface, a wireless interface such as a Wi-Fi interface; the memory is used to store various types of data, which may include, for example, instructions of any application or method in the elevator star sealing control device, as well as application-related data. The memory may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), random access memory (RAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), etc. Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk, etc.; optionally, the memory may also be a storage device independent of the processor; the processor is used to call the elevator satellite sealing control program stored in the memory and execute the elevator satellite sealing control method as described above. The processor may be an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components, and is used to execute all or part of the steps of each embodiment of the elevator satellite sealing control method as described above.

[0119] Need to explain, Figure 2The hardware structure shown in the figure does not constitute a limitation on the elevator star-sealing control device of the present invention, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0120] Example 4

[0121] Based on the same invention concept, Figure 6 and Figure 7 , the first embodiment of the elevator star sealing control system of the present invention is proposed. Figure 6 The functional module diagram shown in FIG. 1 is a detailed description of the elevator star-sealing control system provided in this embodiment. The system may include:

[0122] A control module, configured to implement the elevator star-sealing control method of the first or second embodiment, and output a safe torque-off signal and a star-sealing trigger signal, wherein the star-sealing trigger signal may include an electronic star-sealing trigger signal or a contactor control signal;

[0123] The logic processing module is connected to the control module and is used to perform logic processing on the safety torque off signal and the star-off trigger signal and output a level signal;

[0124] The driving module is connected to the logic processing module and is used to generate a driving signal according to the level signal and output the driving signal;

[0125] The switch module is connected to the drive module and the traction machine respectively, and is used to control the action of the upper and lower bridge arm switch tubes or the action of the star-closing contactor according to the drive signal to control the traction machine to achieve star-closing braking.

[0126] In one embodiment, Figure 6 As shown, the switch module may include IGBT tubes Q1 to Q6;

[0127] Among them, the collectors of Q1, Q2 and Q3 are all connected to the DC bus DC+, the emitter of Q1 is respectively connected to the w phase of the three-phase winding of the traction machine and the collector of Q4, the emitter of Q2 is respectively connected to the v phase of the three-phase winding of the traction machine and the collector of Q5, the emitter of Q3 is respectively connected to the u phase of the three-phase winding of the traction machine and the collector of Q6, the emitter of Q4, Q5 and Q6 are all connected to the DC bus DC-, and at the same time, the gates of Q1 to Q6 are all connected to the drive module.

[0128] In another embodiment, if Figure 7 The figure shows the circuit schematic of the switch module, which may include IGBT tubes Q1 to Q6, a running contactor SW and a shut-off contactor FX.

[0129] Among them, the collector of Q1, the collector of Q2 and the collector of Q3 are all connected to the DC bus DC+, the emitter of Q1 is respectively connected to one end of the running contactor SW and the collector of Q4, the emitter of Q2 is respectively connected to one end of the running contactor SW and the collector of Q5, the emitter of Q3 is respectively connected to one end of the running contactor SW and the collector of Q6, the emitter of Q4, the emitter of Q5 and the emitter of Q6 are all connected to the DC bus DC-, and at the same time, the gates of Q1 to Q6 are all connected to the drive module; the other end of the running contactor SW is respectively connected to the u phase, v phase and w phase of the traction machine, one end of the star-sealing contactor FX is connected in parallel, and the other end is also respectively connected to the u phase, v phase and w phase of the three-phase winding of the traction machine.

[0130] It should be noted that the functions and corresponding technical effects that can be achieved by each module in the elevator star-sealing control system provided in this embodiment can refer to the description of the specific implementation method in the second embodiment of the elevator star-sealing control method of the present invention. For the sake of brevity of the description, they will not be repeated here.

[0131] Example 5

[0132] Based on the same inventive concept, this embodiment provides a computer-readable storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., an SD or DX memory), a random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic memory, a magnetic disk, an optical disk, a server, etc. The storage medium stores a computer program that can be executed by one or more processors. When executed by the processors, the computer program can implement all or part of the steps of each embodiment of the elevator satellite sealing control method of the present invention.

[0133] It should be noted that the serial numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above embodiments are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structures or equivalent process transformations made by utilizing the contents of the present description and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An elevator star-sealing control method, characterized in that: The method comprises: Obtaining elevator stop instructions under different elevator states; the different elevator states include fault state and normal state; Control the traction machine to perform safe torque off action; determining target parameters of the traction machine according to the elevator stop instructions under the different elevator states; the target parameters include the motor speed of the traction machine and / or the motor displacement of the traction machine after the elevator stops; Continuously monitoring the target parameters to determine whether the target parameters of the traction machine meet the star-locking triggering conditions, and controlling the traction machine to perform star-locking braking when the target parameters meet the star-locking triggering conditions; The step of continuously monitoring the target parameters and determining whether the target parameters of the traction machine meet the star-off triggering conditions includes: When the elevator is in a fault state, continuously monitoring the motor speed of the traction machine to determine whether the motor speed is less than a preset speed; if the motor speed is less than the preset speed, determining that the star-off triggering condition is met; When the elevator is in a normal state, the motor displacement of the traction machine after the elevator stops is continuously monitored to determine whether the motor displacement is greater than a preset displacement. If the motor displacement is greater than the preset displacement, it is determined that the star-sealing trigger condition is met.

2. The elevator star-sealing control method according to claim 1, characterized in that: The step of continuously monitoring the target parameters and determining whether the target parameters of the traction machine meet the star-off triggering conditions includes: In any elevator state, the motor speed of the traction machine and the motor displacement of the traction machine after the elevator stops are continuously monitored to determine whether the motor speed is less than the preset speed and whether the motor displacement is greater than the preset displacement. If the motor speed is less than the preset speed or the motor displacement is greater than the preset displacement, it is determined that the star-sealing trigger condition is met.

3. The elevator star-sealing control method according to claim 1, characterized in that: The step of controlling the traction machine to perform star-locking braking includes: By generating an electronic star-blocking trigger signal and sending the electronic star-blocking trigger signal to the upper and lower bridge arm switch tubes in the switch module, the traction machine is controlled to perform star-blocking braking.

4. The elevator star-sealing control method according to claim 1, characterized in that: The step of controlling the traction machine to perform star-locking braking includes: By generating a contactor control signal and sending the contactor control signal to the star-locking contactor in the switch module, the traction machine is controlled to perform star-locking braking.

5. An elevator star-sealing control device, characterized in that: The device includes a processor and a memory, wherein an elevator star-sealing control program is stored in the memory, and when the elevator star-sealing control program is executed by the processor, the elevator star-sealing control method according to any one of claims 1 to 4 is implemented.

6. An elevator star-sealing control system, characterized in that: The system comprises: A control module, configured to implement the elevator star-locking control method according to any one of claims 1 to 4, and output a safe torque-off signal and a star-locking trigger signal; a logic processing module connected to the control module, configured to perform logic processing on the safe torque off signal and the star-sealing trigger signal, and output a level signal; a driving module, connected to the logic processing module, configured to generate a driving signal according to the level signal and output the driving signal; The switch module is connected to the drive module and the traction machine respectively, and is used to control the action of the upper and lower bridge arm switches or the action of the star-closing contactor according to the drive signal to control the traction machine to achieve star-closing braking.

7. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by one or more processors, the elevator star-sealing control method according to any one of claims 1 to 4 is implemented.

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