CN117623042A - Elevator control method, elevator control device and storage medium - Google Patents
Elevator control method, elevator control device and storage medium Download PDFInfo
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Abstract
The embodiment of the application discloses an elevator control method, an elevator control device and a storage medium, which are used in the technical field of elevator control. The method comprises the following steps: when the elevator runs in a fault parking state, the star sealing contactor is closed by the star sealing short-circuit current, so that the star sealing contactor runs under the safe current, and the star sealing contactor is effectively prevented from being damaged; and in the normal parking state and the abnormal parking state, the output contactor and the star sealing contactor are controlled to be opened or closed, so that the quick braking in the star sealing process is realized, and the star sealing action delay can be effectively avoided. It can be seen that the embodiment of the application can ensure that the star-sealed contactor is used for rapidly braking the elevator under the safety current.
Description
Technical Field
The embodiment of the application relates to the technical field of elevator control, in particular to an elevator control method, an elevator control device and a storage medium.
Background
The permanent magnet synchronous traction machine (permanent magnet synchronous motor) has the characteristics of excellent dynamic response performance, high power density, low energy consumption and the like, and has been widely applied to the field of elevator driving hosts. The brake of the traction machine is used as an elevator braking protection device and is a key component for the safe operation of the elevator. The mechanical braking force of the brake is insufficient or the brake fails, so that the elevator can slide or fly, the top and bottom of the elevator can be easily punched, or safety accidents such as shearing can be easily caused, and the star-sealing brake is needed.
The star-sealing braking means that the three-phase windings of the permanent magnet synchronous traction machine are in star-shaped short circuit by using an external circuit or a self-circuit, so that the three-phase windings form a closed electric loop. The purpose of sealing the star is to carry out star short circuit on the three-phase winding of the permanent magnet synchronous traction machine (namely, the motor) when the external power supply is lost or the brake fails, namely, the motor is converted into a generator, the electromagnetic torque generated in the rotation process of the traction sheave is utilized to compensate the mechanical torque generated by unequal weight of the traction sheave and the weight of the car, the mechanical energy is converted into electric energy and is consumed in a heat form in the resistor of the closed loop, so that the speed of the elevator is reduced and the constant low-speed operation is kept.
However, because the capacity of the star-sealing contactor is limited, when the elevator runs at a high speed, if the star is directly sealed, the star-sealing instantaneous current far exceeds the rated current of the star-sealing contactor, and the star-sealing contactor can be damaged; if the hardware is added into the delay circuit, the star sealing action is delayed after normal shutdown, and the star sealing is possibly disabled under the abnormal condition of the brake.
Disclosure of Invention
The embodiment of the application provides an elevator control method, an elevator control device and a storage medium, which can ensure that a star-sealed contactor can rapidly brake an elevator under a safe current.
The embodiment of the application provides an elevator control method, which is applied to an elevator control system and comprises the following steps:
when the elevator runs in a normal parking state, after the star-sealing contactor is controlled to be closed, the output contactor is opened based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator; the elevator control system is connected to the permanent magnet synchronous motor through the output contactor and the star seal contactor;
when the elevator runs in a fault parking state, controlling the output contactor to be kept closed, obtaining star sealing short-circuit current of the permanent magnet synchronous motor, and closing the star sealing contactor based on the star sealing short-circuit current;
and after the star sealing contactor is closed, opening the star sealing contactor based on the three-phase output current of the permanent magnet synchronous motor, and opening the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
Further, the opening of the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the operation speed of the elevator comprises:
and after determining that the contacts of the star sealing contactor are closed, if the three-phase output current of the permanent magnet synchronous motor is smaller than a preset current threshold value or if the running speed of the elevator is smaller than a preset speed threshold value, opening the output contactor.
Further, the obtaining the star-sealed short-circuit current of the permanent magnet synchronous motor includes:
when the permanent magnet synchronous motor operates in a short-circuit braking state, the motor rotating speed of the permanent magnet synchronous motor is input into a current formula:
obtaining the seal star of the permanent magnet synchronous motorShort-circuit current I, wherein omega r R is the rotation speed of the motor s Is stator resistance lambda f For rotor flux, L d Is d-axis inductance.
Further, the closing the star seal contactor based on the star seal short circuit current includes:
and if the star sealing short-circuit current is smaller than the first rated current corresponding to the star sealing contactor, closing the star sealing contactor.
Further, the opening the star seal contactor based on the three-phase output current of the permanent magnet synchronous motor comprises:
detecting three-phase output current of the permanent magnet synchronous motor after the star seal contactor is closed;
and if the effective value of the three-phase output current is larger than the second rated current corresponding to the star-sealing contactor, the star-sealing contactor is disconnected.
Further, when the elevator is running in a normal parking state, controlling the star-closing contactor to be closed comprises:
when the elevator runs for a preset time at zero speed, closing pulse broadband modulation PWM wave generation of the permanent magnet synchronous motor;
and after delaying for a preset short period of time, controlling the star-sealing contactor to be closed.
Further, the method further comprises: and detecting the running state of the elevator based on a preset fault detection rule so as to determine whether the elevator runs in a normal parking state or a fault parking state.
The embodiment of the application also provides an elevator control device, which is applied to an elevator control system and comprises:
the opening unit is used for controlling the star-closing contactor to open the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator after the star-closing contactor is closed when the elevator runs in a normal parking state; the elevator control system is connected to the permanent magnet synchronous motor through the output contactor and the star seal contactor;
the closing unit is used for controlling the output contactor to be kept closed when the elevator runs in a fault parking state, acquiring star sealing short-circuit current of the permanent magnet synchronous motor, and closing the star sealing contactor based on the star sealing short-circuit current;
and the execution unit is used for opening the star sealing contactor based on the three-phase output current of the permanent magnet synchronous motor after the star sealing contactor is closed, and opening the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
The embodiment of the application also provides an elevator control device, which comprises:
the device comprises a central processing unit, a memory, an input/output interface, a wired or wireless network interface and a power supply;
the memory is a short-term memory or a persistent memory;
the central processor is configured to communicate with the memory and to execute the instruction operations in the memory on the control plane functional entity to perform the method described above.
The present embodiments also provide a computer readable storage medium, characterized in that the computer readable storage medium comprises instructions which, when run on a computer, cause the computer to perform the method as described above.
From the above technical solutions, the embodiments of the present application have the following advantages:
in the embodiment of the application, when the elevator runs in a normal parking state, after the star seal contactor is controlled to be closed, the output contactor is opened based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator; the elevator control system is connected to the permanent magnet synchronous motor through an output contactor and a star seal contactor; when the elevator runs in a fault parking state, controlling the output contactor to be kept closed, acquiring star sealing short-circuit current of the permanent magnet synchronous motor, and closing the star sealing contactor based on the star sealing short-circuit current; and after the star sealing contactor is closed, opening the star sealing contactor based on the three-phase output current of the permanent magnet synchronous motor, and opening the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
When the elevator runs in a fault parking state, the star sealing contactor is closed through the star sealing short-circuit current, and the star sealing contactor is opened based on the three-phase output current of the permanent magnet synchronous motor, so that the star sealing contactor runs under safe current, and damage to the star sealing contactor is effectively avoided; and in the normal parking state and the abnormal parking state, the output contactor and the star sealing contactor are controlled to be opened or closed, so that the quick braking in the star sealing process is realized, and the star sealing action delay can be effectively avoided. It can be seen that the embodiment of the application can ensure that the star-sealed contactor is used for rapidly braking the elevator under the safety current.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a flow chart of elevator control disclosed in an embodiment of the present application;
fig. 2 is a block diagram of an elevator control system disclosed in an embodiment of the present application;
fig. 3 is a schematic view of an elevator control device disclosed in an embodiment of the present application;
fig. 4 is a schematic view of another elevator control device disclosed in an embodiment of this application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.
The star-sealed braking means that the three-phase windings of a permanent magnet synchronous traction machine (permanent magnet synchronous motor) are subjected to star-shaped short circuit by utilizing an external circuit or a self-circuit, so that the three-phase windings form a closed electric loop. The purpose of sealing the star is to carry out star short circuit on the three-phase winding of the permanent magnet synchronous traction machine (namely, the motor) when the external power supply is lost or the brake fails, namely, the motor is converted into a generator, the electromagnetic torque generated in the rotation process of the traction sheave is utilized to compensate the mechanical torque generated by unequal weight of the traction sheave and the weight of the car, the mechanical energy is converted into electric energy and is consumed in a heat form in the resistor of the closed loop, so that the speed of the elevator is reduced and the constant low-speed operation is kept.
However, because the capacity of the star-sealing contactor is limited, when the elevator runs at a high speed, if the star is directly sealed, the star-sealing instantaneous current far exceeds the rated current of the star-sealing contactor, and the star-sealing contactor can be damaged; if the hardware is added into the delay circuit, the star sealing action is delayed after normal shutdown, and the star sealing is possibly disabled under the abnormal condition of the brake. Therefore, the embodiment of the application provides an elevator control method, and an applied elevator control system can ensure that a star-sealed contactor carries out rapid braking on an elevator under a safe current, as shown in fig. 1, and specifically comprises the following steps:
101. when the elevator operates in a normal stop state, the output contactor is disconnected based on the three-phase output current of the permanent magnet synchronous motor or the operation speed of the elevator.
In this embodiment of the present application, the elevator control system is connected to the permanent magnet synchronous motor through the output contactor and the star seal contactor, as shown in fig. 2, the elevator control system is connected to the permanent magnet synchronous motor PMSM through the output contactor Y and the star seal contactor FX, and the elevator control system samples three-phase output current through the three-phase electric instantaneous value detection module, and detects the speed signal of the encoder PG through the encoder speed detection module, so as to perform operation control of the permanent magnet synchronous motor. It can be understood that the star-sealing contactor is used for realizing short-circuit braking of the permanent magnet synchronous motor; the permanent magnet synchronous motor is used for controlling and providing power for the operation of the elevator; the elevator control system carries out pulse width modulation on the permanent magnet synchronous motor through the output contactor, so that the operation of the elevator is realized.
In general, the control logic of an elevator control system is: when the elevator is stopped, the output contactor is opened, and the star-sealing contactor is closed; when the elevator starts to operate, the star sealing contactor is opened, the output contactor is closed, and the elevator control system starts Pulse Width Modulation (PWM) wave generation; at the stop time of the elevator, the elevator control system turns off PWM wave generation, the output contactor is opened, and the star-sealing contactor is closed after a period of delay. However, when the output contactor is disconnected at the time of elevator shutdown, current may exist on the output contactor, which easily causes the output contactor to be damaged due to arc discharge under the current.
Therefore, in the embodiment of the application, when the elevator operates in a normal parking state, after the star seal contactor is controlled to be closed, the output contactor is opened based on the three-phase output current of the permanent magnet synchronous motor or the operation speed of the elevator. When the elevator is in a non-parking running state, the star sealing contactor is opened, the output contactor is closed, and when the elevator is converted from the non-parking running state to a normal parking state, the star sealing contactor is controlled to be closed, and then the output contactor is opened based on three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
It will be appreciated that when the elevator is operating in a normal parking condition, the process of controlling the closing of the star-seal contactors may be: when the elevator runs for a preset time at zero speed, closing pulse broadband modulation PWM wave generation of the permanent magnet synchronous motor; when the elevator is stopped normally, when the given speed of the elevator is zero and the feedback speed of the elevator is zero, the elevator control system controls the elevator brake signal to be closed, and when the elevator brake is detected to be closed, the elevator control system runs at zero speed for a preset time period and then closes PWM wave generation; the preset duration is generally 0.5 seconds to 2 seconds, which is not limited herein. When the PWM wave generation is closed, after a preset short period of time T is delayed, the elevator control system controls the star-sealing contactor to be closed. The preset short period of time T may be 2 ms or 3 ms, and is not limited herein.
Specifically, after determining that the contacts of the star sealing contactor are closed, that is, after detecting that the feedback contacts of the star sealing contactor are closed, the elevator control system can detect three-phase output currents Iu, iv and Iw of the permanent magnet synchronous motor, if the three-phase output current of the permanent magnet synchronous motor is smaller than a preset current threshold, the preset current threshold can be one tenth or one eighth of the rated current of the motor of the permanent magnet synchronous motor, and the method is not limited in this place; or, the elevator control system detects that the running speed of the elevator is less than a preset speed threshold, which may be 0.002m/s or 0.003m/s, and is not limited herein, the output contactor is opened. It can be understood that when the running speed of the elevator is smaller than the preset speed threshold value, the three-phase output current of the permanent magnet synchronous motor tends to have no output current, namely, the output contactor is disconnected under the condition that the three-phase output current tends to have no output current, so that the output contactor is effectively prevented from being damaged by arc discharge.
At this time, the star sealing contactor can be quickly connected (namely, the star sealing contactor is closed) within a preset short time period T, so that the star sealing contactor is connected under the condition of very low speed of an elevator even if the elevator brake is abnormal, and the star sealing contactor can play a role in protection, because the star sealing contactor cannot realize the short circuit braking function of the star sealing contactor after the elevator is too fast.
102. When the elevator runs in a fault parking state, the star sealing short circuit current based on the permanent magnet synchronous motor closes the star sealing contactor.
In the embodiment of the application, when the elevator is in a parking process, a fault possibly occurs, and when the elevator runs in a fault parking state, the elevator control system turns off PWM wave generation, controls an elevator brake signal to be turned off, and controls an output contactor to be kept closed; at the moment, the motor rotating speed of the permanent magnet synchronous motor can be detected in real time, the star sealing short-circuit current of the permanent magnet synchronous motor is obtained based on the motor rotating speed, and the star sealing contactor is closed based on the star sealing short-circuit current.
It can be appreciated that the running state of the elevator can be detected based on a preset fault detection rule to determine that the elevator is running in a normal parking state or a fault parking state, where the preset fault detection rule can be used for detecting a brake corresponding to the elevator or detecting a safety loop of the elevator, and the like, and is not limited herein; if faults such as a brake or a safety loop are detected, the elevator can be determined to run in a fault parking state; if no fault is detected, the elevator is determined to be in a normal parking state.
It can be understood that the permanent magnet synchronous motor used on the elevator is a surface-mounted synchronous motor, and in the rotation coordinate system equation of the permanent magnet synchronous motor, L d L and q is dq axis inductance and is approximately equal, ω r The motor rotating speed is the angular speed; when the permanent magnet synchronous motor operates in a short-circuit braking state, the dq-axis stator voltage v d ,v q =0, the current formula (the equation of effective current versus speed) can be found as:
the motor rotating speed of the permanent magnet synchronous motor is input into the current formula, so that the permanent magnet synchronous motor can be obtainedWherein R is s Is stator resistance lambda f Is rotor magnetic flux.
After the star sealing short-circuit current is obtained, closing the star sealing contactor based on the star sealing short-circuit current of the permanent magnet synchronous motor; specifically, if the star seal short-circuit current is smaller than the first rated current corresponding to the star seal contactor, the elevator control system controls the star seal contactor to be closed. The first rated current may be 1.4 times or 1.5 times the rated current of the star contactor, which is not limited herein. The first rated current may be understood as the current allowed by the star seal contactor, i.e., the star seal short circuit current may be compared with the current allowed by the star seal contactor to determine whether to switch in the star seal contactor.
It can be understood that when the star seal short-circuit current is greater than or equal to the first rated current corresponding to the star seal contactor, the star seal short-circuit current is continuously detected based on the motor speed of the permanent magnet synchronous motor until the star seal short-circuit current is smaller than the first rated current corresponding to the star seal contactor, and the star seal contactor is closed.
It can be understood that the execution sequence of the step 102 and the step 101 is not limited herein, and the corresponding steps are executed according to the parking status of the elevator.
103. The star-sealing contactor is opened based on the three-phase output current of the permanent magnet synchronous motor.
After the star sealing contactor is connected, the three-phase output current of the permanent magnet synchronous motor can be monitored to ensure the safety of the star sealing contactor; that is, after the star seal contactor is closed, the star seal contactor can be opened based on the three-phase output current of the permanent magnet synchronous motor. Specifically, after the star seal contactor is closed, the elevator control system can detect the three-phase output current of the permanent magnet synchronous motor in real time; and if the effective value of the three-phase output current is larger than the second rated current corresponding to the star-sealed contactor, the star-sealed contactor is disconnected. The second rated current is greater than the first rated current, and the second rated current may be 1.8 times or 1.9 times the rated current of the star contactor, which is not limited herein.
It will be appreciated that when the star seal contactor is opened, step 102 may be repeated back: the star sealing short circuit current based on the permanent magnet synchronous motor closes the star sealing contactor, so that the star sealing contactor is connected under the safety current.
104. The output contactor is opened based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
When the star seal contactor is closed, the output contactor can be opened based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator. If the three-phase output current of the permanent magnet synchronous motor is smaller than a preset current threshold value, or if the running speed of the elevator is smaller than a preset speed threshold value, the output contactor is disconnected. The specific process is similar to that in step 101, and is not described here.
In the real-time example of the application, when the elevator runs in a fault parking state, the star sealing contactor is closed through the star sealing short-circuit current, and the star sealing contactor is opened based on the three-phase output current of the permanent magnet synchronous motor, so that the star sealing contactor runs under the safe current, and damage to the star sealing contactor is effectively avoided; and in the normal parking state and the abnormal parking state, the output contactor and the star sealing contactor are controlled to be opened or closed, so that the quick braking in the star sealing process is realized, and the star sealing action delay can be effectively avoided. It can be seen that the embodiment of the application can ensure that the star-sealed contactor is used for rapidly braking the elevator under the safety current.
The embodiment of the application also provides an elevator control device, which is applied to an elevator control system, as shown in fig. 3, and comprises:
the opening unit 301 is configured to control the star-closing contactor to open the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the operation speed of the elevator after the star-closing contactor is closed when the elevator is in a normal parking state; the elevator control system is connected to the permanent magnet synchronous motor through the output contactor and the star seal contactor;
the closing unit 302 is configured to control the output contactor to be kept closed when the elevator is in a fault parking state, obtain a star-sealing short-circuit current of the permanent magnet synchronous motor, and close the star-sealing contactor based on the star-sealing short-circuit current;
and the execution unit 303 is used for opening the star sealing contactor based on the three-phase output current of the permanent magnet synchronous motor after the star sealing contactor is closed, and opening the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
The present embodiment also provides an elevator control apparatus 400, as shown in fig. 4, the elevator control apparatus 400 of the present embodiment may include one or more central processing units (CPUs, central processing units) 401 and a memory 402, where the memory 402 stores one or more application programs or data.
Wherein the memory 402 may be volatile storage or persistent storage. The program stored in the memory 402 may include one or more modules, each of which may include a series of instruction operations in the electronic device. Still further, the central processor 401 may be arranged to communicate with the memory 402, executing a series of instruction operations in the memory 402 on the elevator control 400.
The elevator control 400 may also include one or more power supplies 405, one or more wired or wireless network interfaces 404, one or more input/output interfaces 403, and/or one or more operating systems, such as Windows server (tm), mac OS XTM, unixTM, linuxTM, freeBSDTM, etc.
The operations performed by the cpu 401 may be executed by the foregoing first aspect or any specific method embodiment of the first aspect, which is not described herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM, random access memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Claims (10)
1. An elevator control method applied to an elevator control system, comprising:
when the elevator runs in a normal parking state, after the star-sealing contactor is controlled to be closed, the output contactor is opened based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator; the elevator control system is connected to the permanent magnet synchronous motor through the output contactor and the star seal contactor;
when the elevator runs in a fault parking state, controlling the output contactor to be kept closed, obtaining star sealing short-circuit current of the permanent magnet synchronous motor, and closing the star sealing contactor based on the star sealing short-circuit current;
and after the star sealing contactor is closed, opening the star sealing contactor based on the three-phase output current of the permanent magnet synchronous motor, and opening the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
2. The elevator control method according to claim 1, wherein the opening of the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the operation speed of the elevator comprises:
and after determining that the contacts of the star sealing contactor are closed, if the three-phase output current of the permanent magnet synchronous motor is smaller than a preset current threshold value or if the running speed of the elevator is smaller than a preset speed threshold value, opening the output contactor.
3. The elevator control method of claim 1, wherein the obtaining the star-sealed short-circuit current of the permanent magnet synchronous motor comprises:
when the permanent magnet synchronous motor operates in a short-circuit braking state, the motor rotating speed of the permanent magnet synchronous motor is input into a current formula:
obtaining the star-sealed short-circuit current I of the permanent magnet synchronous motor, wherein omega r R is the rotation speed of the motor s Is stator resistance lambda f For rotor flux, L d Is d-axis inductance.
4. The elevator control method of claim 1, wherein the closing the star-sealed contactor based on the star-sealed short circuit current comprises:
and if the star sealing short-circuit current is smaller than the first rated current corresponding to the star sealing contactor, closing the star sealing contactor.
5. The elevator control method of claim 1, wherein the opening the star-seal contactor based on the three-phase output current of the permanent magnet synchronous motor comprises:
detecting three-phase output current of the permanent magnet synchronous motor after the star seal contactor is closed;
and if the effective value of the three-phase output current is larger than the second rated current corresponding to the star-sealing contactor, the star-sealing contactor is disconnected.
6. The elevator control method of claim 1, wherein controlling the star-seal contactor to close when the elevator is operating in a normal parking state comprises:
when the elevator runs for a preset time at zero speed, closing pulse broadband modulation PWM wave generation of the permanent magnet synchronous motor;
and after delaying for a preset short period of time, controlling the star-sealing contactor to be closed.
7. The elevator control method of claim 1, wherein the method further comprises: and detecting the running state of the elevator based on a preset fault detection rule so as to determine whether the elevator runs in a normal parking state or a fault parking state.
8. An elevator control apparatus applied to an elevator control system, comprising:
the opening unit is used for controlling the star-closing contactor to open the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator after the star-closing contactor is closed when the elevator runs in a normal parking state; the elevator control system is connected to the permanent magnet synchronous motor through the output contactor and the star seal contactor;
the closing unit is used for controlling the output contactor to be kept closed when the elevator runs in a fault parking state, acquiring star sealing short-circuit current of the permanent magnet synchronous motor, and closing the star sealing contactor based on the star sealing short-circuit current;
and the execution unit is used for opening the star sealing contactor based on the three-phase output current of the permanent magnet synchronous motor after the star sealing contactor is closed, and opening the output contactor based on the three-phase output current of the permanent magnet synchronous motor or the running speed of the elevator.
9. An elevator control apparatus, comprising:
the device comprises a central processing unit, a memory, an input/output interface, a wired or wireless network interface and a power supply;
the memory is a short-term memory or a persistent memory;
the central processor is configured to communicate with the memory, to execute instruction operations in the memory on a control plane functional entity to perform the method of any one of claims 1 to 7.
10. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of claims 1 to 7.
Priority Applications (1)
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