Star sealing device for elevator and motor winding parameter calculation method thereof

Abstract

The embodiment of the application provides an elevator star sealing device and a motor winding parameter calculation method thereof, and relates to the technical field of elevator control. The device comprises a current and frequency detection unit for obtaining signal parameters of the motor winding during star sealing; a micro control unit for obtaining the actual current value and the car speed during star sealing based on the signal parameters, and sending the actual current value and the car speed to an elevator main control board; and the elevator main control board is in communication connection with the micro control unit, and is used for receiving the actual current value and the car speed during star sealing to monitor the star sealing state of the motor winding. The micro control unit and the elevator main control board can communicate, the motor winding current and the elevator coasting speed information can be transmitted in real time, the elevator is more controllable and safe, and the problem that the elevator main control system cannot obtain the motor winding current and the motor coasting speed information during execution of the star sealing function in the prior art is solved, thereby causing a safety hazard.

Description

TECHNICAL FIELD

[0001] The application relates to the elevator control technical field, in particular to an elevator star sealing device and a motor winding parameter calculation method thereof. BACKGROUND

[0002] The elevator star sealing function refers to that when a permanent magnet synchronous gearless traction machine is used, the star-shaped connection three-phase winding lead-out lines are short-circuited in the power-off period of the traction machine. The elevator with the star sealing function can provide a safe working condition when the elevator car slides due to the imbalance between the elevator car side and the counterweight side caused by the brake failure of the traction machine, and the sliding speed is much lower than the normal running speed of the elevator.

[0003] However, when the existing elevator executes the star sealing function, the motor winding current and the motor coasting speed information cannot be obtained by the elevator main control system, thereby causing a safety hazard. SUMMARY

[0004] The purpose of the embodiment of the application is to provide an elevator star sealing device and a motor winding parameter calculation method thereof, the micro control unit and the elevator main control board can communicate, the motor winding current and the elevator coasting speed information can be transmitted in real time, the elevator is more controllable and safe, and the problem that the motor winding current and the motor coasting speed information cannot be obtained by the elevator main control system when the existing method executes the star sealing function, thereby causing a safety hazard, is solved.

[0005] The embodiment of the application provides an elevator star sealing device, which comprises:

[0006] A current and frequency detection unit, a first end of the current and frequency detection unit is connected with the motor winding, and is used for acquiring signal parameters of the motor winding during star sealing;

[0007] A micro control unit, a second end of the current and frequency detection unit is connected with the micro control unit, and is used for acquiring the car speed and the actual current value during star sealing based on the signal parameters;

[0008] An elevator main control board, the micro control unit is in communication connection with the elevator main control board, and is used for receiving the car speed and the actual current value during star sealing, so as to monitor the star sealing state of the motor winding.

[0009] In the above implementation process, the car speed and the actual current value of the motor winding during star sealing can be calculated based on the sampling current, and the car speed and the actual current value of the motor winding are synchronized to the elevator main control board, the motor winding current and the elevator coasting speed information are transmitted in real time, the elevator is more controllable and safe, and the problem that the motor winding current and the motor coasting speed information cannot be obtained by the elevator main control system when the existing method executes the star sealing function, thereby causing a safety hazard, is solved.

[0010] Further, the signal parameter comprises a voltage signal, and the current and frequency detection unit comprises:

[0011] A current sampling module is connected with the motor winding and is configured to collect a current signal of the motor winding.

[0012] A modulation circuit is connected with the current sampling module and is configured to receive the current signal, modulate the current signal into a voltage signal, and send the voltage signal to the micro control unit.

[0013] In the above implementation process, the operational amplifier modulation circuit is used to complete voltage modulation in the range of the micro control unit analog quantity sampling, so as to obtain the corresponding current based on the voltage signal, i.e. the actual current value.

[0014] Further, the micro control unit comprises:

[0015] An ADC sampling module is configured to receive the voltage signal, sample the voltage signal by ADC, and convert the voltage signal into a digital signal, so as to obtain the corresponding actual current based on the digital signal.

[0016] A car speed calculation module is connected with the ADC sampling module and is configured to calculate the car speed based on the digital signal.

[0017] In the above implementation process, the ADC sampling module is used to realize analog-digital conversion, so as to calculate the actual current and the car speed according to the digital signal subsequently.

[0018] Further, the car speed calculation module comprises:

[0019] A timing sampling module is connected with the ADC sampling module and is configured to sample the digital signal by timing, so as to calculate the time width of the zero-crossing point of the current waveform.

[0020] A zero-crossing point counting module is configured to determine the positive half-cycle time width and the negative half-cycle time width of the current waveform.

[0021] A frequency calculation module is configured to calculate the current frequency at the star-enclosing time based on the positive half-cycle time width and the negative half-cycle time width.

[0022] A car speed obtaining module is configured to calculate the car speed based on the current frequency, the elevator rope winding ratio, and the motor traction wheel diameter.

[0023] In the above implementation process, the current period can be obtained based on the positive half-cycle time width and the negative half-cycle time width, the current frequency can be obtained through the current period, and the current frequency, the elevator rope winding ratio, and the motor traction wheel diameter are all parameters required for calculating the car speed, so the car speed can be calculated.

[0024] Further, the device comprises:

[0025] A speed sensor connected to the micro control unit, for detecting the speed of the car.

[0026] In the above implementation process, another way of detecting the star sealing speed is to use a speed sensor, such as an encoder, a position hall, etc.

[0027] Further, the device comprises:

[0028] A current detection unit connected to the micro control unit, for detecting the current of the motor winding, the current detection unit comprising a linear optical coupling or a hall sensor.

[0029] In the above implementation process, the star sealing current detection can be realized by using a linear optical coupling or a hall sensor, etc.

[0030] Further, the device further comprises:

[0031] A driving unit for receiving the star sealing signal of the elevator main control panel and / or the micro control unit, and sending a driving signal to the static element to make the motor winding execute the star sealing action.

[0032] In the above implementation process, the star sealing control signal of the elevator main control panel and the star sealing control signal of the micro control unit are used to realize composite control of the static element, so as to realize safety and controllability in the star sealing action execution process.

[0033] Further, the device further comprises:

[0034] An isolation detection unit, the input end of which is connected to the micro control unit, and the output end of which is connected to the static element, for detecting the working state of the static element and the connection state of the motor winding.

[0035] In the above implementation process, the isolation detection unit is used to detect whether the star sealing action execution unit is in normal working state and whether the connection of the motor winding is normal, so as to improve the reliability of the safe operation of the elevator.

[0036] The application embodiment provides a motor winding parameter calculation method of an elevator star sealing device, which is applied to the above-mentioned micro control unit, and the method comprises:

[0037] Receiving the signal parameters obtained by sampling the motor winding by the star sealing current and frequency detection unit;

[0038] The car speed and the actual current value at the time of star closing are obtained based on the signal parameters, and the car speed and the actual current value are sent to the elevator main control panel, so that the elevator main control panel monitors the star closing state of the motor winding according to the car speed and the actual current value.

[0039] In the above implementation process, the car speed and the actual current value of the motor winding at the time of star closing can be calculated based on the sampling current, and the car speed and the actual current value of the motor winding are synchronized to the elevator main control panel, realizing real-time transmission of motor winding current and elevator coasting speed information, making the elevator more controllable and safe, and solving the problem that the existing method cannot obtain the current and motor coasting speed information of the motor winding when executing the star closing function, thereby causing safety hazards.

[0040] Further, the signal parameters include voltage signals, and the signal parameters obtained by sampling the motor winding by the star closing time current and frequency detection unit include:

[0041] The voltage signal sent by the current and frequency detection unit is received, and the voltage signal is obtained by collecting the current signal of the motor winding and modulating the current signal.

[0042] In the above implementation process, the voltage modulation conforming to the analog sampling range of the micro control unit is completed by the operational amplifier modulation circuit, so as to obtain the corresponding current based on the voltage signal, that is, the actual current value.

[0043] Further, the car speed and the actual current value at the time of star closing are obtained based on the signal parameters, and the car speed and the actual current value are sent to the elevator main control panel, including:

[0044] The voltage signal is received, and the voltage signal is sampled and converted into a digital signal by ADC, so as to obtain the corresponding actual current based on the digital signal;

[0045] The car speed is calculated based on the digital signal.

[0046] In the above implementation process, analog-digital conversion is realized by ADC sampling, so as to calculate the actual current and the car speed according to the digital signal subsequently.

[0047] Further, the car speed is calculated based on the digital signal, including:

[0048] The digital signal is sampled in timing;

[0049] Based on the timing sampling result, the positive half cycle time width and the negative half cycle time width of the current waveform are determined;

[0050] Based on the positive half cycle time width and the negative half cycle time width, the current frequency of the star-enclosing time is calculated;

[0051] Based on the current frequency, the roping ratio of the elevator and the diameter of the motor traction wheel, the car speed is calculated.

[0052] In the above implementation process, based on the positive half cycle time width and the negative half cycle time width, the current cycle can be obtained, and the current frequency can be obtained through the current cycle. The current frequency, the roping ratio of the elevator and the diameter of the motor traction wheel are all parameters required for calculating the car speed, so the car speed can be calculated. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0054] Figure 1 A structural schematic diagram of an elevator star-enclosing device provided by the embodiments of the present application;

[0055] Figure 2 An implementation schematic diagram of a star-enclosing contactor provided by the embodiments of the present application;

[0056] Figure 3 A current and speed detection schematic diagram provided by the embodiments of the present application;

[0057] Figure 4 A flowchart of a motor winding parameter calculation method of an elevator star-enclosing device provided by the embodiments of the present application;

[0058] Figure 5 A specific detection flowchart of an electronic star-enclosing device provided by the embodiments of the present application;

[0059] Figure 6 A car speed calculation flowchart provided by the embodiments of the present application;

[0060] Figure 7 A specific calculation process flowchart of a car speed provided by the embodiments of the present application.

[0061] Icon:

[0062] 10-Electronic star-sealing board; 11-Elevator main control board; 12-Micro control unit; 13-Drive unit; 14-Static component; 15-Isolation detection unit; 16-Current and frequency detection unit; 17-Power supply; 18-Motor winding; 19-Current sampling module; 20-Modulation circuit; 21-ADC sampling module; 22-Timing sampling module; 23-Zero-crossing counting module; 24-Frequency calculation module; 25-Car speed calculation module. Detailed Implementation

[0063] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0064] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0065] Example 1

[0066] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a sealing device for an elevator provided in an embodiment of this application.

[0067] The existing elevator's star-sealing function is accomplished through a star-sealing contactor, such as... Figure 2 The diagram shows a star-sealing contactor implementing the star-sealing function. The star-sealing contactor is interlocked with the main contactor of the traction machine, which outputs from the frequency converter. When the frequency converter stops outputting, the star-sealing contactor performs a suitable delay before executing the star-sealing function. As a mechanical switch, the star-sealing contactor can only provide feedback to the system on whether its contacts have activated; it cannot provide feedback to the elevator control system on the motor winding current (18) or the traction machine or car's slip speed during star-sealing.

[0068] This application achieves real-time transmission of motor winding current and elevator speed information through communication between the onboard MCU (Microcontroller Unit, microcontroller 12) and the elevator main control board 11 (CAN). This allows the elevator main control board 11 to obtain the motor winding current and elevator speed information in real time, making the elevator more controllable and safer. Specifically, the device includes the elevator main control board 11, the electronic star-sealing board 10, and the motor winding 18. The electronic star-sealing board 10 includes a current and frequency detection unit 16 and the microcontroller unit 12.

[0069] The first end of the current and frequency detection unit 16 is connected to the motor winding 18, and the second end is connected to the microcontroller unit 12, which is used to acquire the signal parameters of the motor winding 18 when the satellite is sealed.

[0070] The micro control unit 12 is connected with the current and frequency detection unit 16, used for obtaining the car speed and the actual current value at the time of star sealing based on the signal parameter, and sending the car speed and the actual current value to the elevator main control board 11;

[0071] The elevator main control board 11 is in communication connection with the micro control unit 12, used for receiving the car speed and the actual current value at the time of star sealing, to monitor the star sealing state of the motor winding 18.

[0072] The device calculates the car speed and the actual current value of the motor winding 18 at the time of star sealing based on the sampling current, and synchronizes the car speed and the actual current value of the motor winding 18 to the elevator main control board 11, to realize the real-time transmission of the motor winding current and the elevator coasting speed information, so that the elevator is more controllable and safe, and the problem that the current and the motor coasting speed information of the motor winding 18 cannot be obtained by the elevator main control system when the existing method executes the star sealing function, thereby causing a safety hazard problem is solved.

[0073] Among them, for example, the signal parameter can be a voltage signal, such as Figure 3 As shown in the figure, the current and speed detection schematic diagram, wherein the current and frequency detection unit 16 includes but is not limited to:

[0074] The current sampling module 19 is connected with the motor winding 18, used for collecting the current signal of the motor winding 18;

[0075] For example, the current of the motor winding 18 can be sampled by using the current sensor to obtain the current signal.

[0076] The modulation circuit 20 is connected with the current sampling module 19, used for receiving the current signal, and modulating the current signal to voltage, so as to convert the current signal into voltage signal, and send the converted voltage signal to the micro control unit 12.

[0077] Because the U, V, W three-phase current is symmetrical and the phase difference between each other is 120 degrees when the motor winding 18 star seals and coasts, only one, for example, U phase needs to be detected. The current signal of U phase is sampled by the current sensor, and the voltage modulation conforming to the MCU analog quantity sampling range is completed through the operational amplifier modulation circuit 20, to convert the voltage signal.

[0078] The micro control unit 12 converts the sampled voltage signal into the actual current value, and sends it to the elevator main control board 11 through the CAN bus.

[0079] Based on the voltage signal, the current value corresponding to the voltage signal can be obtained, that is, the actual current value.

[0080] The communication between the micro control unit 12 and the elevator main control board 11 is not limited to CAN communication, and can also use RS485, RS232, UART and other communication modes, and is not limited in this regard.

[0081] The micro control unit 12 includes but is not limited to:

[0082] The ADC sampling module 21 is configured to receive the voltage signal, perform ADC sampling on the voltage signal, and convert the voltage signal into a digital signal, so as to obtain a corresponding actual current value based on the digital signal.

[0083] The actual current value can be sent to the elevator main control board 11 through the CAN bus.

[0084] After the current sampling and voltage modulation are completed, the modulation result is input to the ADC interface of the MCU, and the conversion of the signal is realized through the ADC sampling module 21.

[0085] The car speed calculation module 25 is connected with the ADC sampling module 21 and is configured to calculate the car speed based on the digital signal.

[0086] The car speed calculation module 25 includes but is not limited to:

[0087] The timing sampling module 22 is connected with the ADC sampling module 21 and is configured to perform timing sampling on the digital signal, so as to calculate the time width of the zero-crossing point of the current waveform.

[0088] The zero-crossing point counting module 23 is configured to determine the positive half-cycle time width and the negative half-cycle time width of the current waveform.

[0089] The frequency calculation module 24 is configured to calculate the current frequency at the time of the star being sealed based on the positive half-cycle time width and the negative half-cycle time width.

[0090] The car speed is calculated based on the current frequency, the roping ratio of the elevator, and the diameter of the motor traction wheel.

[0091] Through timing sampling, the current period can be obtained in combination with the zero-crossing point counting, and the current frequency can be obtained according to the current period.

[0092] The specific calculation formula of the current frequency is as follows:

[0093]

[0094] Wherein, f c represents the current frequency, N represents the number of timing sampling points in the positive half cycle and the negative half cycle, and ΔT represents the time interval of timing sampling.

[0095] The current frequency, the rope ratio of the elevator and the diameter of the traction sheave of the motor are parameters required for calculating the car speed, and the car speed can be calculated based on the parameters.

[0096] As another implementation, the detection of the car speed can also use a speed sensor connected with the micro control unit 12 for detecting the car speed.

[0097] As another implementation, the detection of the current of the motor winding 18 can also use a current detection unit connected with the micro control unit 12 for detecting the current of the motor winding 18, which includes a linear optical coupling, a Hall sensor or a sampling resistor, etc., without any limitation here.

[0098] The calculated car speed is synchronously sent to the elevator main control board 11 to realize real-time transmission of the motor coil current and the elevator coasting speed information, so that the elevator is more controllable and safe.

[0099] In addition, the electronic star board 10 is also provided with an isolation detection unit 15 and a power supply 17, wherein the first end of the isolation detection unit 15 is connected with the micro control unit 12, and the second end is connected with the static element 14 for detecting the working state of the static element 14 and the connection state of the motor winding 18, which can be specifically used for detecting whether the static element 14 is normal and whether the motor winding 18 is connected normally, thereby improving the reliability of safe operation of the elevator.

[0100] The static element 14 is short-circuited with the motor winding 18 for receiving the driving signal and performing the star sealing action. For example, the static element 14 is an IGBT (Insulated Gate Bipolar Transistor), which is short-circuited with the three-phase winding of the motor to complete the star sealing function of the three-phase winding of the motor.

[0101] The power supply 17 is used for supplying power to the components on the electronic star board 10, such as providing an isolation power supply 17 for the static element 14 unit, so that the static element 14 realizes isolation power consumption and ensures the safety of power consumption of the static element 14.

[0102] The MCU unit (micro control unit 12) completes the functions of communication with the elevator main control board 11, input of the star sealing signal of the elevator main control board 11, driving of the static element 14, detection of the static element 14 unit, detection of the current and frequency, monitoring of the power supply 17, etc.

[0103] The driving unit 13 has an input end connected with the elevator main control board 11 and the micro control unit 12 respectively and an output end connected with the static element 14 for receiving the star sealing signal sent by the elevator main control board 11 and / or the micro control unit 12 and sending a driving signal to the static element 14.

[0104] The driving unit 13 includes a U-phase driving, a V-phase driving, and a W-phase driving, which correspond to the U-phase winding, the V-phase winding, and the W-phase winding of the motor winding 18 through the static element 14, so that the U-phase driving, the V-phase driving, and the W-phase driving unit 13 push-pull drive the static element 14.

[0105] The driving unit 13 is connected with the elevator main control board 11 and the micro control unit 12, so as to receive the star sealing signal from the driving unit 13 and the micro control unit 12, so as to realize the composite control of the star sealing function, and has high safety.

[0106] The device realizes the composite control of the star sealing function through the on-board MCU and CAN communication, and can realize the real-time transmission of the motor coil current and the elevator coasting speed information, so as to make the elevator more controllable and safe.

[0107] Embodiment 2

[0108] The embodiment of the application provides a motor winding 18 parameter calculation method of an elevator star sealing device, which is applied to the micro control unit 12 in the embodiment 1, as shown in the figure, which is a flow chart of the motor winding parameter calculation method of the elevator star sealing device, and the method specifically includes the following steps: Figure 4

[0109] Step S100: receiving the signal parameters obtained by sampling the motor winding 18 by the current and frequency detection unit 16 at the time of star sealing;

[0110] Step S200: obtaining the car speed and the actual current value at the time of star sealing based on the signal parameters, and sending the car speed and the actual current value to the elevator main control board 11, so that the elevator main control board 11 monitors the star sealing state of the motor winding 18 according to the car speed and the actual current value.

[0111] The method can calculate the car speed and the actual current value of the motor winding 18 at the time of star sealing based on the sampling current, and synchronize the car speed and the actual current value of the motor winding 18 to the elevator main control board 11, so as to realize the real-time transmission of the motor coil current and the elevator coasting speed information, make the elevator more controllable and safe, and solve the problem that the elevator main control system cannot obtain the current and the motor coasting speed information of the motor winding 18 when the existing method executes the star sealing function, thereby causing a safety hazard.

[0112] As shown in the figure, it is a specific detection flow chart of the electronic star sealing device, and the signal parameter can be a voltage signal, specifically: Figure 5

[0113] ​​The voltage signal is received from the current and frequency detection unit 16. The voltage signal is obtained by collecting the current signal of the motor winding 18 and modulating the current signal.

[0114] The operational amplifier modulation circuit 20 modulates the voltage to the range of analog signal sampling of the microcontroller unit 12, so as to obtain the corresponding current based on the voltage signal, which is the actual current value.

[0115] Since the three-phase currents U, V, and W are symmetrical when the motor winding 18 is sealed and the phase difference between any two phases is 120 degrees, only one phase needs to be detected, such as phase U. The current signal of phase U is sampled by a current sensor and then modulated by an operational amplifier modulation circuit 20 to achieve voltage modulation within the analog signal sampling range of the MCU, thus converting it into a voltage signal.

[0116] After completing current sampling and voltage modulation, the modulation result is input to the ADC interface of the MCU.

[0117] The microcontroller unit 12 converts the sampled voltage signal into an actual current value and sends it to the elevator main control board 11 via the CAN bus.

[0118] The actual current value can be obtained from the voltage signal, which corresponds to the voltage signal.

[0119] The communication between the microcontroller unit 12 and the elevator main control board 11 is not limited to CAN communication, but can also use various communication methods such as RS485, RS232, and UART, without any restrictions.

[0120] like Figure 6 The diagram shown is a flowchart for calculating the car speed. Step S200 may specifically include the following steps:

[0121] Step S210: Receive the voltage signal, sample the voltage signal using an ADC and convert it into a digital signal, so as to obtain the corresponding actual current value based on the digital signal;

[0122] The actual current value can be sent to the elevator main control board 11 via the CAN bus.

[0123] Step S220: Calculate the car speed based on the digital signal.

[0124] Analog-to-digital conversion is achieved through ADC sampling, so that the actual current and car speed can be calculated based on the digital signal.

[0125] like Figure 7 The diagram shows the specific calculation process for the car speed. Step S220 may include the following steps:

[0126] Step S221: timing sampling on the digital signal;

[0127] Step S222: determining the positive half cycle time width and the negative half cycle time width of the current waveform based on the timing sampling result;

[0128] Step S223: calculating the current frequency of the star-enclosing time based on the positive half cycle time width and the negative half cycle time width;

[0129] Step S224: calculating the car speed based on the current frequency, the roping ratio of the elevator and the diameter of the motor traction sheave.

[0130] The current period can be obtained based on the positive half cycle time width and the negative half cycle time width, the current frequency can be obtained through the current period, and the current frequency, the roping ratio of the elevator and the diameter of the motor traction sheave are all parameters required for calculating the car speed, so the car speed can be calculated.

[0131] The calculated car speed and the actual current value of the motor winding 18 are synchronously sent to the elevator main control board 11, realizing real-time transmission of the motor coil current and the elevator coasting speed information, so that the whole star-enclosing process is safe and controllable, and the use safety of the elevator is improved.

[0132] In addition, the star-enclosing current detection can be realized by linear optical coupling, Hall sensor, resistance sampling and the like; in addition to the current direction timing judgment method described above, the star-enclosing speed detection can also be realized by speed sensors such as encoders and position Hall, which will not be described here.

[0133] The embodiment of the application further provides an electronic device, which comprises a memory and a processor, the memory is used for storing a computer program, and the processor runs the computer program to make the electronic device execute the motor winding parameter calculation method of the star-enclosing device for elevator described in embodiment 2.

[0134] The embodiment of the application further provides a readable storage medium, which stores computer program instructions, and the computer program instructions are read and run by a processor to execute the motor winding parameter calculation method of the star-enclosing device for elevator described in embodiment 2.

[0135] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can also be implemented by other means. The apparatus embodiments described above are only illustrative, for example, the flowcharts and block diagrams in the drawings show the possible implementation architecture, function and operation of the apparatus, method and computer program product according to the embodiments of the present application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logic function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different order from that shown in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0136] In addition, the functional modules in the various embodiments of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0137] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0138] The above merely provides an example of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0139] The above merely provides an example of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0140] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. An elevator star sealing device characterized by comprising: The device comprises: a current and frequency detection unit, a first end of the current and frequency detection unit being connected to a motor winding, for obtaining signal parameters of the motor winding during star sealing; a micro control unit, a second end of the current and frequency detection unit being connected to the micro control unit, for obtaining a car speed and an actual current value during star sealing based on the signal parameters; an elevator main control board, the micro control unit being communicatively connected to the elevator main control board, for receiving the car speed and the actual current value during star sealing, to monitor a star sealing state of the motor winding; an isolation detection unit, an input end of the isolation detection unit being connected to the micro control unit, and an output end of the isolation detection unit being connected to a static element, for detecting a working state of the static element and a connection state of the motor winding, the static element being short-circuited with the motor winding, for receiving a driving signal sent by a driving unit and performing a star sealing action.

2. The star sealing device for an elevator according to claim 1, characterized by The signal parameters comprise a voltage signal, and the current and frequency detection unit comprises: a current sampling module, connected to the motor winding, for collecting a current signal of the motor winding; a modulation circuit, connected to the current sampling module, for receiving the current signal, and performing voltage modulation on the current signal, converting the current signal into a voltage signal, and sending the voltage signal to the micro control unit.

3. The star sealing device for an elevator according to claim 2, characterized by The micro control unit comprises: an ADC sampling module, for receiving the voltage signal, performing ADC sampling on the voltage signal, and converting the voltage signal into a digital signal, to obtain a corresponding actual current value based on the digital signal; a car speed calculation module, connected to the ADC sampling module, for calculating the car speed based on the digital signal.

4. The star sealing device for an elevator according to claim 3, characterized by The car speed calculation module comprises: a timing sampling module, connected to the ADC sampling module, for performing timing sampling on the digital signal, to calculate a time width of a zero-crossing point of a current waveform; a zero-crossing point counting module, for determining a positive half-cycle time width and a negative half-cycle time width of the current waveform; a frequency calculation module, for calculating a current frequency during star sealing based on the positive half-cycle time width and the negative half-cycle time width; a car speed obtaining module, for calculating the car speed based on the current frequency, a roping ratio of the elevator, and a diameter of a motor traction sheave.

5. The star seal device for an elevator according to claim 1, characterized by The device comprises: a current detection unit, connected to the micro control unit, for detecting a current of the motor winding, the current detection unit comprising a linear optocoupler or a Hall sensor.

6. The star seal device for an elevator according to claim 1, characterized by The device further comprises: a driving unit, for receiving a star sealing signal of the elevator main control board and / or the micro control unit, and sending a driving signal to the static element, to make the motor winding perform a star sealing action.

7. A method of calculating motor winding parameters of an elevator star seal device, characterized by, The method is applied to the star sealing device for the elevator according to any one of claims 1-6, and the method comprises: receiving signal parameters obtained by the current and frequency detection unit sampling the motor winding during star sealing, the signal parameters comprising a voltage signal; The signal parameters are used to obtain the car speed and the actual current value at the time of star closure, and the car speed and the actual current value are sent to the elevator main control panel, so that the elevator main control panel monitors the star closure state of the motor winding according to the car speed and the actual current value. The car speed at the time of star closure is obtained based on the signal parameters, including: ADC sampling and converting the voltage signal into a digital signal; timing sampling of the digital signal; determining the positive half-cycle time width and the negative half-cycle time width of the current waveform based on the timing sampling result; calculating the current frequency at the time of star closure based on the positive half-cycle time width and the negative half-cycle time width; and calculating the car speed based on the current frequency, the elevator roping ratio, and the motor traction sheave diameter.

8. The method of claim 7, wherein the motor winding parameter of the star seal device for the elevator is calculated. The signal parameters obtained by the receiving star-closing-time current and frequency detection unit sampling the motor winding include: The voltage signal received by the receiving current and frequency detection unit is a current signal collected from the motor winding and obtained by voltage modulation of the current signal.

9. The method of claim 8, wherein the motor winding parameter of the star seal device for the elevator is calculated. The car speed at the time of star closure is obtained based on the signal parameters, and the car speed and the actual current value are sent to the elevator main control panel, including: The voltage signal is received, ADC sampling and converting the voltage signal into a digital signal to obtain the corresponding actual current value based on the digital signal.

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