CN113942903A - Elevator control method and elevator - Google Patents
Elevator control method and elevator Download PDFInfo
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- CN113942903A CN113942903A CN202111302261.5A CN202111302261A CN113942903A CN 113942903 A CN113942903 A CN 113942903A CN 202111302261 A CN202111302261 A CN 202111302261A CN 113942903 A CN113942903 A CN 113942903A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3423—Control system configuration, i.e. lay-out
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Elevator Control (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The embodiment of the application relates to the field of elevators, and provides an elevator control method and an elevator, wherein the elevator control method comprises the following steps: after the driver receives the emergency operation instruction, the tractor is adjusted to have a designated operation state, so that the elevator enters a load observation state, and the load observation state is finished within a preset time; acquiring actual acceleration or theoretical acceleration of a car of an elevator during a load observation state; acquiring a given acceleration based on the relation between the actual acceleration or the theoretical acceleration and the maximum preset acceleration and the minimum preset acceleration; generating a given speed matched with the actual load of the elevator at a given acceleration, wherein the given speed is less than or equal to a target speed; after the load observation state is finished, the elevator car of the elevator runs at a given speed until the elevator car reaches the leveling position, so that the capacity of an emergency power supply can be at least reduced, the equipment volume is further reduced, and the cost of a rescue device is saved.
Description
Technical Field
The embodiment of the application relates to the field of elevators, in particular to an elevator control method and an elevator.
Background
In the world, more and more high-rise buildings are built, and an elevator system is widely used, so that great convenience is brought to the life of people. If the elevator runs in a sudden power failure condition in the process of running, the elevator can be stopped immediately at the moment even if the elevator is located at a non-door area position, and for the sake of safety, when the elevator is located at the non-door area position, a car door is not allowed to be opened, so that passengers cannot leave the car, and a 'trapped' event occurs.
If the emergency rescue device does not exist, maintenance personnel need to quickly respond and arrive at the machine room for turning and releasing the personnel in time; when an emergency rescue device is arranged, the control system is automatically switched to a backup emergency power supply after a delay of several seconds, the Elevator emergency rescue device is triggered to enter an (automatic rescue) rescue operation mode, and the Elevator automatically opens a door to release people after going to a door area nearby and on a flat floor. In practical application, the elevator is usually provided with such an emergency rescue device to provide a backup power supply for the ARD operation. Wherein the type selection of the emergency rescue device is related to the actual power of the elevator ARD in operation.
How to reduce the capacity of the emergency power supply on the premise of ensuring the success of rescue is important for the rescue device of the elevator.
Disclosure of Invention
The embodiment of the application provides a control method of an elevator and the elevator, which are at least beneficial to reducing the capacity of an emergency power supply, further reducing the equipment volume and saving the cost of a rescue device.
According to some embodiments of the present application, in one aspect, the present application provides a control method of an elevator including a main power supply circuit, an emergency rescue apparatus, and a driver that is powered by the main power supply circuit and drives a traction machine of the elevator to run, including: if the power supply voltage of the main power supply loop is abnormal, the emergency rescue device is switched to supply power to the driver, and the driver drives a traction machine of the elevator to operate; the method for the drive to drive the traction machine of the elevator comprises the following steps: after the driver receives an emergency operation instruction, the tractor is adjusted to have a specified operation state so as to enable the elevator to enter a load observation state, the specified operation state is that the torque current of the tractor is zero or the actual operation speed of the lift car of the elevator is zero, and the load observation state is finished within a preset time; acquiring an actual acceleration or a theoretical acceleration of the elevator during the load observation state; acquiring a given acceleration based on the relation between the actual acceleration or the theoretical acceleration and the maximum preset acceleration and the minimum preset acceleration; generating a given speed matching an actual load of the elevator at the given acceleration, and the given speed being less than or equal to a target speed; after the load observing state is ended, the car of the elevator runs at the given speed until the car reaches a leveling position.
Preferably, the specified operation state is that the torque current of the traction machine is zero; the control method further comprises the following steps: acquiring an actual running speed of a car of the elevator during the load observing state.
Preferably, ending the load observing state within the preset time includes: the elevator enters a load observation state to start timing, and if the duration time of the load observation state is less than the preset time and the actual running speed is greater than or equal to a preset threshold value, the load observation state is ended; and if the actual running speed is always less than the preset threshold value during the load observation state, finishing the load observation state after the preset time.
Preferably, the specified running state is that the actual running speed of the elevator is zero; the control method further comprises the following steps: during the load observing state, a load torque of the hoisting machine is acquired, and the theoretical acceleration of the elevator is acquired based on the load torque.
Preferably, generating a given speed matching an actual load of the elevator at the given acceleration comprises: the given speed is incremented at the given acceleration until the given speed equals the target speed.
Preferably, the method of acquiring a given acceleration includes: if Afbk is greater than Amax, the given acceleration is equal to the maximum preset acceleration; if Afbk < Amin, then the given acceleration is equal to the minimum preset acceleration; and if Amin is not less than Afbk is not less than Amax, the given acceleration is equal to the actual acceleration or the theoretical acceleration, wherein Afbk is the actual acceleration or the theoretical acceleration, Amin is the minimum preset acceleration, and Amax is the maximum preset acceleration.
Preferably, the preset time is in the range of 0.02s to 1.20 s.
According to some embodiments of the present application, another aspect of the embodiments of the present application also provides an elevator, including: a detection module for detecting a torque current of the traction machine or the actual running speed of a car of the elevator; the control module is used for adjusting the traction machine to have a specified running state so as to enable the elevator to enter the load observation state; a load matching module, configured to, during the load observation state, obtain an actual acceleration or a theoretical acceleration of the elevator, obtain a given acceleration based on a relationship between the actual acceleration or the theoretical acceleration and a maximum preset acceleration and a minimum preset acceleration, and generate a given speed that matches the actual load of the elevator at the given acceleration, where the given speed is less than or equal to a target speed; the control module is further configured to control the car of the elevator to travel at the given speed until the car reaches a leveling position after the load observing state is ended.
Preferably, the emergency rescue apparatus includes: the charging circuit is connected with the main power supply circuit; the power supply input end of the storage battery is connected with the charging loop and is charged through the charging loop; the boosting loop is connected with the power supply output end of the storage battery and is used for performing direct-current boosting conversion on the power supply output by the storage battery; and the inverter circuit is respectively connected with the boosting circuit and the driver, and inverts the direct-current voltage output by the boosting circuit into alternating current and outputs the alternating current to the power supply end of the driver.
Preferably, the elevator further comprises a main board, and if the power supply voltage of the main power supply loop is abnormal, the main board sends an emergency operation instruction.
Preferably, the driver receives the emergency operation command and controls the traction machine to operate with low power consumption. The technical scheme provided by the embodiment of the application has at least the following advantages:
the method comprises the steps that a given speed matched with the actual load of the elevator is generated at a given acceleration, the given speed is smaller than or equal to a target speed, after a load observation state is finished, the elevator car of the elevator runs at the given speed until the elevator car reaches a flat floor position, on one hand, when the power supply voltage of a main power supply loop is abnormal in the use of the elevator and the elevator car is not located at a door area position, the success of rescue can be guaranteed, on the other hand, the speed curve automatically generated by the elevator is matched with the actual load condition of the elevator and can be changed along with the abnormal power supply voltage, the requirements for the peak power and the peak current of the emergency power supply during the ARD running can be reduced to the maximum extent, the capacity of the emergency power supply can be further reduced, the equipment size is reduced, and the cost of a rescue device is saved.
Drawings
One or more embodiments are illustrated by corresponding figures in the drawings, which are not to be construed as limiting the embodiments, unless expressly stated otherwise, and the drawings are not to scale.
Fig. 1 is a schematic flow chart of a control method of an elevator according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a connection relationship between an emergency rescue device and an elevator system in an elevator control method according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a drive in a control method of an elevator according to an embodiment of the present application;
fig. 4 is a schematic flowchart of a method for driving a traction machine of an elevator by a driver in a control method of an elevator according to an embodiment of the present application;
fig. 5 is a schematic flow chart illustrating a process of adjusting a motor of a traction machine to have a designated operation state in a control method of an elevator according to an embodiment of the present application;
fig. 6 is a schematic flowchart illustrating a process of ending a load observing state within a preset time in a control method of an elevator according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an elevator according to an embodiment of the present application.
Detailed Description
As known from the background art, in the common ARD operation mode, the driver has the following two processing modes:
firstly, controlling the tractor to operate according to an operation command and a speed command of a main board;
in the second mode, the operation command and the speed are controlled by the main board, but the operation direction is determined by the driver, and the operation direction and the stress direction are kept consistent.
The second method is the current mainstream using method, saves energy and has smaller operation power consumption than the first method, the capacity of the allocated emergency power supply is reduced compared with the first method, but the speed curve in the second method is also fixed, namely, the speed curve can not change along with the actual load condition of the elevator. The type selection of the emergency rescue device is related to the actual power of the elevator ARD during operation, and when the power is selected to be small in the full-load limit occasion, the undervoltage of a frequency converter bus can still be caused due to insufficient output power and current of the emergency power supply, so that the ARD rescue operation fails, and the capacity of the emergency power supply is limited to be further reduced.
The embodiment of the application provides a control method of an elevator and the elevator, a given speed matched with an actual load of the elevator is generated at a given acceleration, the requirements on peak power and peak current of an emergency power supply during the ARD operation period are reduced to the maximum extent, the capacity of the emergency power supply can be further reduced, the size of a control cabinet is reduced, and the cost of a rescue device is saved.
In order to make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The control method of the elevator and the application scenario of the elevator provided by the embodiment of the application can include but are not limited to: the passenger elevator system is applied to scenes such as office buildings, residential buildings, schools, subways and the like; a freight elevator system applied to large-scale factories such as power plants, steel plants, cement plants, and the like; the elevator system is applied to special scenes such as hospitals, scientific and technological institutions and research institutes; the hollow elevator system is applied to mines, construction sites and other scenes.
Embodiments of the present application will be described in more detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a control method of an elevator according to an embodiment of the present application. As shown in fig. 2 and 3, the elevator system includes a main circuit 1 and an emergency rescue apparatus 2, the main circuit 1 includes a main power supply circuit, a driver 11, and a hoisting machine 12, and the driver 11 is supplied with power from the main power supply circuit and drives the hoisting machine 12 of the elevator to operate. The driver 11 includes a driving circuit and a control circuit, wherein the driving circuit is composed of a rectifying unit, an inverter unit, a dc bus, a braking unit, etc., and the traction motor is driven to rotate by the output of the inverter unit, the control circuit is composed of a control unit, a driving unit, etc., and the driving unit is connected with the driving circuit. The driver 11 is also connected with the emergency rescue device 2, and the control loop and the driving loop are interconnected through communication or interact through an input/output terminal to realize command transmission and state feedback. The emergency rescue device 2 comprises a storage battery 21, a charging circuit 22, a boosting circuit 23 and an inverter circuit 24, and the emergency rescue device 2 is connected to the main power supply circuit and charges the storage battery 21 through the charging circuit 22; the boost circuit 23 is connected with the power output end of the storage battery 21 and performs direct-current boost conversion on the power output by the storage battery 21; the inverter circuit 24 is connected to the boost circuit 23, and when the utility power is disconnected, the inverter circuit 24 inverts the dc voltage output from the boost circuit 23 into ac power and outputs the ac power to the power supply terminal of the driver 11, and supplies power to the driving circuit instead of the utility power.
Specifically, in some embodiments, referring to fig. 3, the control loop of the drive 11 may be a main board 111 for receiving commands and sending commands, and the drive loop may be a frequency converter 112 for executing commands and feeding back commands. The command is a CMD command, and the command content comprises an emergency operation command, a target speed command, a stop command and the like.
More specifically, the frequency converter 112 includes a processing unit 113, a motor control unit 114, a detection unit 115, and a feedback unit 116, where the processing unit 113 processes an elevator load matching related function, the motor control unit 114 outputs a pwm control signal to drive the hoisting machine 12 to rotate, the detection unit 115 receives the elevator load matching related function and outputs the elevator load matching related function to the processing unit 113 and the feedback unit 116, the detection module 115 includes a speed measurement module and a measurement module, the speed measurement module detects an actual running speed and an actual acceleration of the car of the elevator, the measurement module detects a torque current of the hoisting machine, and the feedback unit 116 feeds back a relationship between a given acceleration and the actual acceleration or the theoretical acceleration and outputs the relationship to the motor control unit 114. The related functions of the elevator load matching comprise the speed, voltage, current, power, frequency, magnetic pole position and the like of the elevator car.
In addition, the elevator system should also comprise a switching unit and a detection unit, wherein the input end of the switching unit is connected with the main power supply loop and the emergency rescue device 2, and the output end of the switching unit is connected with a driver 11 of the elevator; the switching unit outputs a commercial power supply or an emergency power supply to the driver 11; the detection unit detects the power supply voltage information of the main power supply circuit and sends a signal to the switching unit and the emergency rescue device 2. If the power supply voltage of the main power supply loop is abnormal, the detection unit sends a signal to the switching unit and switches the emergency rescue device 2 to supply power to the driver 11, so that the tractor 12 of the elevator is driven to operate.
Specifically, the control method of the elevator of some embodiments of the present application includes the steps of:
step S1: the supply voltage of the main supply loop, for example the mains voltage, is detected in real time. Specifically, the power supply voltage information of the main power supply loop is detected by the detection unit and sent to the switching unit and the emergency rescue device 2.
Step S2: and judging whether the power supply voltage of the main power supply loop is abnormal or not, executing the step S3 when the power supply voltage of the main power supply loop is abnormal, otherwise returning to the step S1, and continuously detecting the power supply voltage of the main power supply loop. The input voltage abnormality of the main power supply loop comprises the phase loss or the power failure of the power supply voltage of the main power supply loop.
Step S3: the connection of the drive 11 to the supply voltage of the main supply circuit is disconnected, and at the same time the supply of the control circuit of the drive 11 is switched over to the emergency rescue device 2. Specifically, the above steps are performed by the switching unit.
Step S4: the traction machine 12 of the elevator is driven to run so that the car is run to the leveling position, and after the car reaches the leveling position, the car door and the hall door are opened so that the passengers leave the car.
As shown in fig. 3, the method is a schematic flow chart of a method for driving a hoisting machine of an elevator by an actuator in a control method of an elevator provided in an embodiment of the present application, and the method may be specifically executed by a control circuit of the actuator 11, and may also be executed by the control circuit in combination with the emergency rescue device 11, and specifically may include the following steps:
step S31: the driver 11 receives the emergency operation instruction.
Step S32: the hoisting machine 12 is adjusted to have a specified movement state to bring the elevator into a load observing state.
Step S33: and ending the load observation state within a preset time.
Specifically, the preset time ranges from 0.02s to 1.20s, specifically 1.00 s.
Step S34: during the load observation phase, the actual acceleration or the theoretical acceleration of the elevator is taken.
Step S35: and acquiring the given acceleration based on the relation between the actual acceleration or the theoretical acceleration and the maximum preset acceleration and the minimum preset acceleration.
Specifically, the method for acquiring the given acceleration comprises the following steps:
if Afbk is greater than Amax, the given acceleration is equal to the maximum preset acceleration;
if Afbk is less than Amin, the given acceleration is equal to the minimum preset acceleration;
and if Amin is less than or equal to Afbk and less than or equal to Amax, the given acceleration is equal to the actual acceleration or the theoretical acceleration, wherein Afbk is the actual acceleration or the theoretical acceleration, Amin is the minimum preset acceleration, and Amax is the maximum preset acceleration.
More specifically, the maximum preset acceleration is 2.5m/s2The minimum preset acceleration is 0.05m/s2。
Step S36: a given speed is generated at a given acceleration that matches the actual load of the elevator, and the given speed is less than or equal to the target speed.
Specifically, the given speed is incremented at the given acceleration until the given speed is equal to the target speed.
More specifically, the target speed ranges from 0.10m/s to 0.30m/s, specifically 0.20 m/s. Step S37: after the load observation state is finished, the car of the elevator runs at a given speed until the car reaches the leveling position.
Specifically, if the target speed is reduced during the operation of the car of the elevator at a given speed, the given speed is also reduced at the same time.
As shown in fig. 4, in some embodiments of the present application, the motor of the traction machine can be adjusted to have a designated operating state by the following specific steps:
step S320: the hoisting machine 12 is adjusted to have a specified movement state to bring the elevator into a load observing state.
Specifically, the specified state is that the torque current of the hoisting machine is zero or the actual running speed of the car of the elevator is zero.
Step S321: the assigned movement state is that the actual running speed of the car of the elevator is zero.
Step S322: during a load observation state, a load torque current of a hoisting machine is acquired, and the theoretical acceleration of the elevator is acquired based on the load torque current.
Specifically, the load torque current of the traction machine can be sampled in real time through the measuring module, and the theoretical acceleration of the elevator can be obtained according to the load torque current. The theoretical acceleration is obtained by calculation, for example, by the following calculation formula (1):
A＝9549*P*r*Iqref/(N*J*k*I) (1)
wherein: p is rated power (kw), r is the radius of the traction sheave (m), Iqref is the load torque current (A), N is the rated speed (rpm), and J is the system inertia (kg m)2) K is a traction ratio, and I is a rated current (A) of the traction machine.
In other embodiments of the present application, the motor of the traction machine can be adjusted to have a designated operating state by the following steps:
step S320: the hoisting machine 12 is adjusted to have a specified movement state to bring the elevator into a load observing state.
Step S321: the specified motion state is that the torque current of the traction machine is zero.
Step S322: during the load observation phase, the actual running speed as well as the actual acceleration of the elevator are taken.
As shown in fig. 5, in some embodiments of the present application, the load observing state may be ended within a preset time by the following steps:
step S331: and when the elevator enters the load observation state, starting timing, judging whether the duration time of the load observation state is less than the preset time, and executing the step S332 when the duration time of the load observation state is less than the preset time, otherwise, finishing the load observation state by the elevator after the preset time.
Step S332: and judging whether the actual running speed of the elevator car is less than a preset threshold value or not, returning to the step S331 when the actual running speed of the elevator car is less than the preset speed, continuously judging whether the duration time of the load observation state is less than the preset time or not, and otherwise, finishing the load observation state.
Specifically, the preset threshold is less than or equal to the target speed, and the range of the preset threshold is 0.05m/s to 0.15m/s, specifically 0.10 m/s.
According to some embodiments of the method, a given speed matched with the actual load of the elevator is generated at a given acceleration, the given speed is less than or equal to a target speed, after a load observation state is finished, the car of the elevator runs at the given speed until the car reaches a leveling position, on one hand, when the power supply voltage of a main power supply loop is abnormal and the car of the elevator is not located at a door zone position in the use process of the elevator, the rescue success can be guaranteed, on the other hand, the speed curve automatically generated by the elevator is matched with the actual load condition of the elevator and can be changed along with the situation, the requirements for the peak power and the peak current of an emergency power supply during the ARD running period can be reduced to the maximum extent, the capacity of the emergency power supply can be further reduced, the size of equipment is reduced, and the cost of a rescue device is saved.
Some embodiments of the present application further provide an elevator, which is analyzed with reference to fig. 7, and includes: the detection module 41 is used for detecting the torque current of the tractor or the actual running speed of the elevator car of the elevator by the detection module 41; a control module 42, the control module 42 being configured to adjust the hoisting machine 12 to have a specified operating state to bring the elevator into a load observing state; a load matching module 43, configured to, during a load observation state, obtain an actual acceleration or a theoretical acceleration of the elevator, obtain a given acceleration based on a relationship between the actual acceleration or the theoretical acceleration and a maximum preset acceleration and a minimum preset acceleration, and generate a given speed that matches the actual load of the elevator at the given acceleration, where the given speed is less than or equal to a target speed; the control module 42 is also arranged to control the car of the elevator to run at a given speed after the end of the load observing situation until the car reaches the leveling position. The detection module 41, the control module 42 and the load matching module 43 constitute the frequency converter 4.
The elevator also comprises a main board 3, and if the power supply voltage of the main power supply loop is abnormal, the main board 3 sends an emergency operation instruction.
Referring to fig. 2, the emergency rescue apparatus 2 is connected to a driver 11, and the driver 11 receives an emergency operation command to control the traction machine 12 to operate with low power consumption. The emergency rescue apparatus 2 includes: the charging circuit 22, the charging circuit 22 is connected with the main power supply circuit; the power supply input end of the storage battery 21 is connected with the charging loop 22 and is charged through the charging loop 22; a voltage boosting circuit 23, wherein the voltage boosting circuit 23 is connected with the power output end of the storage battery 21, and performs direct current voltage boosting conversion on the power output by the storage battery 21; and the inverter circuit 24 is connected with the booster circuit 23 and the driver 11 respectively, and the inverter circuit 24 inverts the direct-current voltage output by the booster circuit 23 into alternating current and outputs the alternating current to the power supply end of the driver 11 and replaces the commercial power to supply power for the driving circuit.
In addition, the main circuit 1 should further include a switching unit and a detection unit, an input end of the switching unit is connected with the main power supply circuit and the emergency rescue device 2, and an output end of the switching unit is connected with a driver 11 of the elevator; the switching unit outputs a commercial power supply or an emergency power supply to the driver 11; the detection unit detects the power supply voltage information of the main power supply circuit and sends a signal to the switching unit and the emergency rescue device 2. If the power supply voltage of the main power supply loop is abnormal, the detection unit sends a signal to the switching unit and switches the emergency rescue device 2 to supply power to the driver 11, so that the tractor 12 of the elevator is driven to operate.
The elevator in this embodiment and the control method of the elevator in the embodiment corresponding to fig. 1 and 4-6 belong to the same concept, and the specific implementation process is described in detail in the corresponding method embodiment, and the technical features in the method embodiment are correspondingly applicable in this elevator embodiment, and are not described herein again.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the application, and it is intended that the scope of the application be limited only by the claims appended hereto.
Claims (11)
1. A control method of an elevator, characterized in that the elevator comprises a main power supply circuit, an emergency rescue device, and a drive which is powered by the main power supply circuit and drives a traction machine of the elevator to run, comprising:
if the power supply voltage of the main power supply loop is abnormal, the emergency rescue device is switched to supply power to the driver, and the driver drives a traction machine of the elevator to operate; the method for the drive to drive the traction machine of the elevator comprises the following steps:
after the driver receives an emergency operation instruction, the tractor is adjusted to have a specified operation state so as to enable the elevator to enter a load observation state, the specified operation state is that the torque current of the tractor is zero or the actual operation speed of the lift car of the elevator is zero, and the load observation state is finished within a preset time;
acquiring an actual acceleration or a theoretical acceleration of the elevator during the load observation state;
acquiring a given acceleration based on the relation between the actual acceleration or the theoretical acceleration and the maximum preset acceleration and the minimum preset acceleration;
generating a given speed matching an actual load of the elevator at the given acceleration, and the given speed being less than or equal to a target speed;
after the load observing state is ended, the car of the elevator runs at the given speed until the car reaches a leveling position.
2. The control method of an elevator according to claim 1, wherein the specified operation state is that a torque current of the hoisting machine is zero; the control method further comprises the following steps: acquiring an actual running speed of a car of the elevator during the load observing state.
3. The control method of the elevator according to claim 2, wherein ending the load observing state within the preset time includes:
the elevator enters a load observation state to start timing, and if the duration time of the load observation state is less than the preset time and the actual running speed is greater than or equal to a preset threshold value, the load observation state is ended;
and if the actual running speed is always less than the preset threshold value during the load observation state, finishing the load observation state after the preset time.
4. The control method of the elevator according to claim 1, wherein the specified running state is that an actual running speed of a car of the elevator is zero; the control method further comprises the following steps: during the load observing state, a load torque of the hoisting machine is acquired, and the theoretical acceleration of the elevator is acquired based on the load torque.
5. The control method of the elevator according to claim 1, characterized in that generating a given speed matching an actual load of the elevator at the given acceleration comprises: the given speed is incremented at the given acceleration until the given speed equals the target speed.
6. The control method of an elevator according to claim 1, wherein the method of acquiring the given acceleration includes:
if Afbk is greater than Amax, the given acceleration is equal to the maximum preset acceleration;
if Afbk < Amin, then the given acceleration is equal to the minimum preset acceleration;
and if Amin is not less than Afbk is not less than Amax, the given acceleration is equal to the actual acceleration or the theoretical acceleration, wherein Afbk is the actual acceleration or the theoretical acceleration, Amin is the minimum preset acceleration, and Amax is the maximum preset acceleration.
7. The control method of an elevator according to claim 1, wherein the preset time is in a range of 0.02s to 1.20 s.
8. An elevator for implementing the control method according to any one of claims 1-7, characterized in that the elevator comprises: a detection module for detecting a torque current of the traction machine or the actual running speed of a car of the elevator;
the control module is used for adjusting the traction machine to have a specified running state so as to enable the elevator to enter the load observation state;
a load matching module, configured to, during the load observation state, obtain an actual acceleration or a theoretical acceleration of the elevator, obtain a given acceleration based on a relationship between the actual acceleration or the theoretical acceleration and a maximum preset acceleration and a minimum preset acceleration, and generate a given speed that matches the actual load of the elevator at the given acceleration, where the given speed is less than or equal to a target speed;
the control module is further configured to control the car of the elevator to travel at the given speed until the car reaches a leveling position after the load observing state is ended.
9. The elevator as claimed in claim 8, the emergency rescue apparatus comprising:
the charging circuit is connected with the main power supply circuit;
the power supply input end of the storage battery is connected with the charging loop and is charged through the charging loop;
the boosting loop is connected with the power supply output end of the storage battery and is used for performing direct-current boosting conversion on the power supply output by the storage battery;
and the inverter circuit is respectively connected with the boosting circuit and the driver, and inverts the direct-current voltage output by the boosting circuit into alternating current and outputs the alternating current to the power supply end of the driver.
10. The elevator of claim 8, further comprising a main board that issues an emergency operation command if the supply voltage of the main power supply loop is abnormal.
11. The elevator as claimed in claim 10, the drive receives the emergency operation command and controls the traction machine to operate with low power consumption.
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