Elevator drive system equivalent verification method and device

Abstract

The present application relates to an elevator drive system equivalent verification method and device, wherein the method includes: processing the operating current curve data of the traction machine in the sample elevator during the operating cycle to obtain a sample current waveform curve; obtaining the current curve data of the traction machine to be verified during the operating cycle under test conditions, processing the current curve data of the traction machine to be verified to obtain the current waveform curve to be tested; the test conditions include the load motor being in an unloaded state for the traction machine to be verified; determining a torque loading curve based on the sample current waveform curve and the current waveform curve to be tested; outputting a torque instruction based on the torque loading curve; the torque instruction is used to instruct the load control cabinet to drive the load motor to enter the load loading state; and obtaining the verification result of the device to be verified in response to the load motor entering the load loading state. The present application can obtain an accurate load motor loading torque curve and achieve high-reliability matching verification.

Description

Technical Field

[0001] The present application relates to the field of elevator technology, and in particular to an elevator drive system equivalence verification method and device. Background Art

[0002] Currently, elevator drive system testing involves installing a complete elevator prototype on a tower for verification. Continuous, periodic testing is performed with a fully loaded or custom-defined car load according to a specific operating pattern. This verifies whether the temperature rise of main circuit components (such as the power module) meets design requirements under extreme operating conditions. Simulating the number of operations throughout the elevator's design lifecycle further verifies the reliability of the control cabinet. However, due to limitations such as insufficient shaft height for the prototype elevator and the difficulty in realistically simulating rush hour and arrival / departure times, current equivalent testing methods are unable to accurately and effectively verify the elevator's dynamic performance and system reliability. Summary of the Invention

[0003] Based on this, it is necessary to provide an elevator drive system equivalent verification method and device that can improve verification accuracy in response to the above technical problems.

[0004] In a first aspect, the present application provides an elevator drive system equivalent verification method, which is applied to a verification control device in an elevator ground equivalent verification system; the elevator ground equivalent verification system is used to install a device to be verified, which includes a traction machine to be verified and an elevator control cabinet; the elevator ground equivalent verification system includes a load motor connected to the traction machine to be verified, and the verification control device is connected to the load motor through the load control cabinet, and is connected to the traction machine to be verified through the elevator control cabinet; the method includes:

[0005] Processing the running current curve data of the traction machine in the sample elevator during the running cycle to obtain a sample current waveform curve;

[0006] When the test conditions are met and a start command is received from the elevator control cabinet, the current curve data of the traction machine to be verified within the operation cycle is obtained, and the current curve data of the traction machine to be verified is processed to obtain a current waveform curve to be tested; the test conditions include that the load motor is in an unloaded state relative to the traction machine to be verified;

[0007] Determine the torque loading curve based on the sample current waveform curve and the current waveform curve to be measured;

[0008] Output torque command according to the torque loading curve; the torque command is used to instruct the load control cabinet to drive the load motor into the load loading state;

[0009] In response to the load motor entering a load loading state, a verification result of the device to be verified is obtained.

[0010] In one embodiment, the step of determining the torque loading curve according to the sample current waveform curve and the current waveform curve to be measured includes:

[0011] Reading the sample current waveform curve in sections to obtain each section sample current curve, and obtaining the first current effective value of the stable section curve in each section sample current curve;

[0012] The current waveform curve to be measured is read in sections to obtain each section of the current curve to be measured, and the second current effective value of the stable section curve in each section of the current curve to be measured is obtained;

[0013] Obtaining an effective value of the traction machine current on the load side according to the first effective value of the current and the second effective value of the current, and converting the effective value of the traction machine current into a torque value;

[0014] Based on the torque value, a torque loading curve is determined according to curve parameters of the transition section curve in each segmented sample current curve and curve parameters of the transition section curve in each segmented current curve to be measured.

[0015] In one embodiment, the sample current waveform curve includes any one of a traction machine effective value current curve and a traction machine current original envelope curve;

[0016] The step of reading the sample current waveform curve in segments to obtain the sample current curves of each segment includes:

[0017] By monitoring the running signal of the sample elevator, the waveform starting point of the sample current waveform curve is determined;

[0018] Starting from the waveform starting point, mark the key points in chronological order according to the waveform shape of the sample current waveform curve;

[0019] The curve between the waveform starting point and the first key point, and the curves between the remaining adjacent key points, are respectively identified as the sample current curves of each segment.

[0020] In one embodiment, the current waveform curve to be measured includes any one of a traction machine effective value current curve and a traction machine current original envelope curve;

[0021] The step of reading the current waveform curve to be measured in segments to obtain the current curve to be measured in each segment includes:

[0022] Determine the starting point of the waveform of the current waveform curve to be measured according to the received start command transmitted by the elevator control cabinet;

[0023] Starting from the waveform starting point, mark the key points in chronological order according to the waveform shape of the current waveform curve to be measured;

[0024] The curve between the waveform starting point and the first key point, and the curves between the remaining adjacent key points, are respectively identified as the current curves to be measured in each segment.

[0025] In one embodiment, the curve parameter includes a slope; the operation cycle includes a power operation phase and a regenerative operation phase;

[0026] In response to the load motor entering a load loading state, the step of obtaining a verification result of the device to be verified includes:

[0027] In response to the load motor entering the load loading state, the current deviation of the traction motor to be verified is obtained; the current deviation of the traction motor to be verified is obtained according to the current value of the traction motor to be verified and the current value of the traction motor in the sample elevator;

[0028] Confirm whether the current deviation meets the deviation requirements;

[0029] If the current deviation meets the deviation requirement, the torque loading curve is determined as the test curve;

[0030] If the current deviation does not meet the deviation requirement, the torque loading curve is corrected until a corrected torque loading curve is obtained so that the current deviation meets the deviation requirement, and the corrected torque loading curve is determined as the test curve;

[0031] The test curve is used to perform load verification on the device to be verified to obtain the verification result.

[0032] In one embodiment, if the current deviation does not meet the deviation requirement, the step of correcting the torque loading curve includes:

[0033] Obtain the rated current of the traction machine and the rated torque corresponding to the rated current of the traction machine;

[0034] The ratio of rated torque to rated current of the traction machine is determined as the resolution;

[0035] The compensation torque is obtained according to the current deviation value and the resolution; the current deviation value includes the difference between the first current effective value and the second current effective value when the torque loading curve is adopted;

[0036] The compensation torque is used to correct the torque loading curve to obtain a corrected torque loading curve.

[0037] In one embodiment, the step of determining the torque loading curve according to the sample current waveform curve and the current waveform curve to be measured includes:

[0038] Performing format conversion on the sample current waveform curve and the current waveform curve to be measured respectively to obtain the sample current waveform curve after format conversion and the current waveform curve to be measured after format conversion;

[0039] Using the traction machine current torque model, the sample current waveform after format conversion is converted into a basic torque curve, and the current waveform curve to be measured after format conversion is converted into a torque compensation curve;

[0040] Based on the torque compensation curve and the basic torque curve, the torque loading curve is obtained.

[0041] In a second aspect, the present application further provides an elevator drive system equivalent verification device, which is applied to a verification control device in an elevator ground equivalent verification system; the elevator ground equivalent verification system is used to install a device to be verified, and the device to be verified includes a traction machine and an elevator control cabinet; the elevator ground equivalent verification system includes a load motor connected to the traction machine to be verified, and the verification control device is connected to the load motor through the load control cabinet, and is connected to the traction machine to be verified through the elevator control cabinet; the elevator drive system equivalent verification device includes:

[0042] The sample curve acquisition module is used to process the running current curve data of the traction machine in the sample elevator during the running cycle to obtain the sample current waveform curve;

[0043] The test curve acquisition module is used to obtain the current curve data of the traction machine to be verified during the operation cycle when the test conditions are met and the start command transmitted by the elevator control cabinet is received, and the current curve data of the traction machine to be verified is processed to obtain the current waveform curve to be tested; the test conditions include that the load motor is in an unloaded state relative to the traction machine to be verified;

[0044] A loading curve acquisition module is used to determine a torque loading curve based on a sample current waveform curve and a current waveform curve to be measured;

[0045] The command output module is used to output the torque command according to the torque loading curve; the torque command is used to instruct the load control cabinet to drive the load motor to enter the load loading state;

[0046] The verification module is used to respond to the load motor entering the load loading state and obtain the verification result of the device to be verified.

[0047] In a third aspect, the present application further provides a verification control device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0048] In a fourth aspect, the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0049] The above-mentioned elevator drive system equivalent verification method and device, this application obtains the sample current waveform curve and the current waveform curve to be measured by measuring the sample elevator traction motor current and the traction motor current of the device to be verified in the elevator ground equivalent verification system, wherein the current waveform curve to be measured is obtained when the test conditions are met and the start command transmitted by the elevator control cabinet is received. The test conditions include that the load motor is in an unloaded state for the traction motor to be verified, and then according to the sample current waveform curve and the current waveform curve to be measured, an accurate load motor loading torque curve is obtained, which truly simulates the elevator operating conditions and realizes the matching verification of the reliability of the control cabinet under development; this application can be used for performance verification such as power cycle and thermal cycle life of the power module in the main circuit, and can also perform verification of the elevator's peak operating conditions such as going on and off duty, without occupying shaft resources, shortening the verification cycle and reducing resource consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 2. A diagram showing an application environment of an elevator drive system equivalent verification method according to an embodiment;

[0051] Figure 2 1 is a flow chart of an equivalent verification method for an elevator drive system according to an embodiment;

[0052] Figure 3 A schematic diagram of a sample current waveform curve in one embodiment;

[0053] Figure 4 A schematic diagram of a sample current waveform curve in another embodiment;

[0054] Figure 5 Schematic diagram of a current waveform curve to be measured in one embodiment;

[0055] Figure 6 A schematic diagram of a waveform curve of a current to be measured in another embodiment;

[0056] Figure 7 Schematic diagram of a process for obtaining a torque loading curve in one embodiment;

[0057] Figure 8 A schematic diagram of segmented reading of a sample current waveform curve in one embodiment;

[0058] Figure 9 is a schematic diagram of segmented reading of a sample current waveform curve in another embodiment;

[0059] Figure 10 A schematic diagram of segmented reading of a current waveform curve to be measured in one embodiment;

[0060] Figure 11A schematic diagram of segmented reading of a current waveform curve to be measured according to another embodiment;

[0061] Figure 12 is a schematic diagram of a moment loading curve in one embodiment;

[0062] Figure 13 Schematic diagram of a traction machine current torque model in one embodiment;

[0063] Figure 14 1. A schematic diagram of a specific flow chart of an elevator drive system equivalent verification method according to an embodiment;

[0064] Figure 15 A schematic diagram of a process for obtaining a torque loading curve in another embodiment;

[0065] Figure 16 is a schematic diagram of processing a sample current waveform curve in one embodiment;

[0066] Figure 17 A schematic diagram of processing a current waveform curve to be measured in one embodiment;

[0067] Figure 18 FIG. 4 is a structural block diagram of an elevator drive system equivalent verification device in one embodiment. DETAILED DESCRIPTION

[0068] To facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0069] It will be understood that the terms "first," "second," etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. Spatial relationship terms such as "under," "below," "below," "under," "above," and "above" may be used herein to describe the relationship between an element or feature shown in the figures and other elements or features. It should be understood that in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the drawings is flipped, the element or feature described as "under the other element," "under it," or "below it" will be oriented "above" the other element or feature. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0070] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to another element, or connected to another element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection" and the like if there is a transmission of electrical signals or data between the connected objects. When used herein, the singular forms of "one", "an" and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the existence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the existence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, the term "and / or" used in this manual includes any and all combinations of the relevant listed items.

[0071] In traditional elevator drive system simulation test methods, the elevator control system needs to calculate the load torque command in real time based on the physical quantities under the actual operating conditions of the elevator, and transmit it to the variable frequency drive device in real time to drive the load motor. Since the calculation processing requires a certain period of time and there will be delays in signal transmission, there is a lag in torque loading. At the same time, this method requires corresponding non-standard design of software and hardware in the elevator control cabinet (control system), and the system must have strong computing and real-time communication capabilities, which increases the technical difficulty of the test system and the inconvenience of test implementation. At the same time, this method does not involve an algorithm for accurately calculating the elevator's rotational inertia J, and cannot guarantee undistorted simulation of the elevator operating conditions. Assuming that the above theories can be implemented and ignoring loading lag, this traditional method also suffers from physical simulation distortion. That is, the real-time variable frequency drive load torque command is only the torque required for theoretical calculation of the elevator's own operating conditions. The drive motor (traction machine) and the load motor simultaneously provide equal and opposite forces. The test device consists of the tested traction main unit (including the drive motor), the load motor, and a coupling. The motor's rotor and coupling have physical inertia. Therefore, this excess inertia will inevitably make the actual acceleration current and acceleration torque of the drive motor greater than the current required on the simulation tower.

[0072] Furthermore, when the elevator opens the brake before starting, to prevent the car from rolling back due to the gravity difference caused by the imbalance between the car and the counterweight, the control cabinet inverter will provide an equal and opposite compensation torque to keep the motor at zero speed. The temperature of the power module will rise sharply when it is turned on at low frequency. This state needs to be realistically simulated in the ground equivalent device, that is, it is necessary to apply the corresponding torque at this time. The traditional method is to realize dynamic simulation of load loading based on the traction motor speed signal. This traditional control method cannot realize simulated loading before and after the brake is opened. If it realizes zero speed loading, the load motor of the load host will be blocked for a long time when the elevator stops, causing long-term short-circuit heating of the load motor and rapid heating of the power module when it is turned on at low frequency, shortening the service life of the motor and inverter power module, or even burning them out.

[0073] As mentioned above, the traditional equivalent test method cannot accurately and effectively verify the dynamic performance and system reliability of the elevator. For example, it cannot accurately simulate the dynamic torque required by the elevator on the test device, and the load loading timing does not meet the actual working conditions of the elevator. Secondly, the traditional solution also has at least the following problems: ① Due to the height limit of the elevator test tower shaft, some elevator specifications with large lifting heights cannot be effectively simulated and verified; ② The elevator prototype cannot effectively simulate the peak working conditions after work (continuous long periods of full load descent and no load descent); ③ The current elevator drive system test requires non-standard modification to the original elevator control system, which is technically difficult and inconvenient to test; ④ The current elevator drive system test does not take into account the verification of the life of the traction machine brake under normal operating conditions.

[0074] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0075] The elevator drive system equivalent verification method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Figure 1 The figure shows an elevator ground equivalent verification system, which includes a device to be verified, a load simulation device, and a verification control device. Furthermore, the device to be verified includes an elevator control cabinet 2 and a traction machine 1 (the elevator traction machine, i.e., the traction machine to be verified). The elevator control cabinet 2 is electrically connected to the traction machine 1, which may include one or more of a motor, a traction sheave, and a brake. The load simulation device includes a load control cabinet 4 and a load motor 3. The load control cabinet 4 is electrically connected to the load motor 3, and the load motor 3 is connected to the power output of the traction machine 1 via a coupling 6. The verification control device 5 is electrically connected to the elevator control cabinet 2 and the load control cabinet 4.

[0076] Among them, each time the elevator control cabinet 2 drives the traction machine 1 to run, it gives a start signal (for example: the auxiliary contact switch signal of the elevator main contactor, the operation drive I / O signal given by the main control, etc.) to the verification control device 5. The verification control device 5 gives the load control cabinet 4 a variable frequency drive torque instruction according to the set torque loading curve (time-torque curve) according to the operation cycle mode. When the elevator stop signal is given, the verification control device 5 stops the output of the torque instruction, and then drives the load motor 3 to realize the dynamic loading and unloading required for the simulated elevator. This application uses an elevator ground equivalent verification system that includes a device to be verified, a load simulation device, and a verification control device to complete the matching verification of the control cabinet and the traction machine in the elevator development on the ground. The simulation has high accuracy and does not occupy shaft resources, shortening the verification cycle and reducing resource consumption.

[0077] In one embodiment, Figure 2 As shown, a method for equivalent verification of an elevator drive system is provided, which is applied to Figure 1 The verification control device in the elevator ground equivalent verification system in the embodiment of the present invention is used as an example to illustrate that the elevator ground equivalent verification system is used to install the device to be verified, and the device to be verified includes a traction machine to be verified and an elevator control cabinet; the elevator ground equivalent verification system includes a load motor connected to the traction machine to be verified, and the verification control device is connected to the load motor through the load control cabinet, and is connected to the traction machine to be verified through the elevator control cabinet; the method includes the following steps:

[0078] Step 202, processing the running current curve data of the traction machine in the sample elevator during the running cycle to obtain a sample current waveform curve;

[0079] Specifically, the sample current waveform curve may include a periodic current curve, which may refer to the operating current curve data of the traction machine in the sample elevator during the operating cycle, obtained through processing. In some examples, the sample elevator may refer to a sample elevator, which may be an elevator using the aforementioned device to be verified (the traction machine to be verified and the elevator control cabinet), or an elevator using a traction machine and an elevator control cabinet of the same specifications as the aforementioned device to be verified, or an elevator of other types. For example, an operating cycle may be run in accordance with a prescribed mode to obtain a complete current curve waveform, and this application is not limited to this.

[0080] In some examples, the operation cycle may include a power operation phase and a regenerative operation phase.

[0081] Specifically, the operating cycle in the embodiments of the present application may include a power-operating segment and a regenerative segment; the sample current waveform curve in the present application may refer to the complete current curve waveform of a sample elevator (sample elevator) in a specified operating mode for one operating cycle (including the power-operating segment and the regenerative segment). It should be noted that the sample current waveform curve in the present application may also refer to the complete current curve obtained for a sample elevator in a specified operating mode (without distinguishing between the power-operating segment and the regenerative segment).

[0082] In one embodiment, the sample current waveform curve may include any one of a traction machine effective value current curve and a traction machine current original envelope curve.

[0083] Specifically, taking the sample current waveform curve as the effective current curve of the traction machine as an example, the method of obtaining the sample current waveform curve in the present application may include: using an oscilloscope to record the effective current curve of the entire cycle of the sample elevator traction machine motor (such as Figure 3 As shown), the oscilloscope may have an RMS (Root Mean Square) processing function, where RMS refers to the effective value of the oscilloscope measurement parameter.

[0084] Furthermore, taking the sample current waveform curve as the original envelope curve of the traction machine current as an example, the method of obtaining the sample current waveform curve in the present application may include: using an oscilloscope to record the original envelope waveform of the current of the sample elevator traction machine motor throughout the cycle (such as Figure 4 shown).

[0085] It should be noted that Figure 3 、 Figure 4 The elevator operation instruction may refer to the operation instruction output by the elevator control cabinet, which may include a start instruction, etc.; further, the elevator operation instruction may be implemented using operation signals, such as high and low level signals, voltage signals, and I / O (Input / Output) output signals.

[0086] Step 204: When the test conditions are met and a start command is received from the elevator control cabinet, current curve data of the traction machine to be verified during the operation cycle is obtained, and the current curve data of the traction machine to be verified is processed to obtain a current waveform curve to be tested. The test conditions include that the load motor is in an unloaded state relative to the traction machine to be verified.

[0087] Specifically, the present application proposes to obtain the current curve data of the load motor for the traction machine to be verified when the traction machine to be verified is in an unloaded state, and then obtain the current waveform curve to be measured; that is, the present application can obtain the elevator simulation current when the elevator ground equivalent verification system with the traction machine to be verified installed is not loaded; further, the current waveform of the current waveform curve to be measured in the present application is a complete operating cycle.

[0088] In some examples, an oscilloscope can be used to test the elevator simulation current when the elevator ground equivalent verification system with the traction machine to be verified is installed is not loaded, and the current waveform is a complete operating cycle.

[0089] In one embodiment, the current waveform curve to be measured may include any one of the effective value current curve of the traction machine and the original envelope curve of the traction machine current; specifically, Figure 5 As shown, an oscilloscope can be used to record the effective value current curve of the entire cycle of the traction motor to be verified, wherein the oscilloscope can have an RMS processing function, that is, the current waveform curve to be measured is an effective value waveform. In other examples, such as Figure 6 As shown, an oscilloscope can be used to record the original envelope waveform of the current of the traction motor to be verified throughout the entire cycle, that is, the current waveform curve to be measured is an envelope waveform.

[0090] Step 206, determining a torque loading curve based on the sample current waveform curve and the current waveform curve to be measured;

[0091] Specifically, the present application can obtain a torque loading curve based on the sample current waveform curve and the current waveform curve to be measured. The torque loading curve can be used to indicate the torque value that the load motor needs to load.

[0092] In some examples, for the sample current waveform curve and the current waveform curve to be measured, the effective value of the current of the key parts can be read by reasonably drawing points and segmenting, and then combined with the compensation model for correction calculation, so as to obtain an accurate load motor loading torque curve, truly simulate the elevator operating conditions, and realize the matching verification of the reliability of the control cabinet under development.

[0093] In other examples, the sample current waveform curve can be converted into a torque curve, which is used as the basic torque curve loaded on the load control cabinet (inverter) in the elevator ground equivalent verification system. The current waveform curve to be measured is then converted into a load motor torque compensation curve to obtain a torque loading curve.

[0094] Step 208: output a torque instruction according to the torque loading curve; the torque instruction is used to instruct the load control cabinet to drive the load motor to enter a load loading state.

[0095] Specifically, after obtaining the torque loading curve, the corresponding load-side torque instruction can be generated, thereby instructing the load control cabinet to drive the load motor into the load loading state; for example, the load motor torque is loaded according to the generated load-side torque instruction curve, and different segments of the instruction curve can be set according to the operating cycle mode of the elevator for combined loading in a certain sequence.

[0096] Step 210 , in response to the load motor entering a load loading state, obtaining a verification result of the device to be verified.

[0097] Specifically, after the load motor enters the load loading state, the loading verification mode is confirmed to be executed, and then combined loading can be performed according to the operating cycle and timing set by the elevator to achieve performance and life verification of the electrical drive system under different modes.

[0098] In the above-mentioned elevator drive system equivalent verification method, by measuring the sample elevator traction motor current and the traction motor current of the device to be verified in the elevator ground equivalent verification system, the sample current waveform curve and the current waveform curve to be measured are obtained, wherein the current waveform curve to be measured is obtained when the test conditions are met and the start command transmitted by the elevator control cabinet is received. The test conditions include that the load motor is in an unloaded state for the traction motor to be verified, and then according to the sample current waveform curve and the current waveform curve to be measured, an accurate load motor loading torque curve is obtained, which truly simulates the elevator operating conditions and realizes the matching verification of the reliability of the control cabinet under development; the present application can be used for performance verification such as power cycle and thermal cycle life of the power module in the main circuit, and can also perform verification of the elevator's peak operating conditions during work and off-duty hours, without occupying shaft resources, shortening the verification cycle and reducing resource consumption.

[0099] In one embodiment, Figure 7 As shown, step 206 determines the torque loading curve based on the sample current waveform curve and the current waveform curve to be measured, which may include:

[0100] Step 702 , reading the sample current waveform curve in sections to obtain each section sample current curve, and obtaining the first current effective value of the stable section curve in each section sample current curve;

[0101] Specifically, after obtaining the sample current waveform curve, the sample current waveform curve is segmented and read to obtain each segmented sample current curve; the present application obtains the key part of the sample current curve by segmented reading.

[0102] In one embodiment, the step of reading the sample current waveform curve in segments to obtain each segmented sample current curve includes:

[0103] By monitoring the running signal of the sample elevator, the waveform starting point of the sample current waveform curve is determined;

[0104] Starting from the waveform starting point, mark the key points in chronological order according to the waveform shape of the sample current waveform curve;

[0105] The curve between the waveform starting point and the first key point, and the curves between the remaining adjacent key points, are respectively identified as the sample current curves of each segment.

[0106] Specifically, the operating signal of the sample elevator may include any one or any combination of the high and low level signals of the elevator's main contactor coil, the voltage signal of the main contactor contact point, and the operating status I / O output signal of the elevator main control board. Based on the operating signal, the waveform starting point of the sample current waveform curve can be determined. Then, based on the waveform starting point, in chronological order and according to the waveform shape (stable section and transition section) of the sample current waveform curve, reasonable points are drawn, and the effective current value of the key part can be read in segments. In some examples, the sample current waveform curve may include any one of the effective value current curve of the traction machine and the original envelope curve of the traction machine current.

[0107] Take the sample current waveform curve as the effective current curve of the traction machine as an example, Figure 8 As shown, an oscilloscope (with RMS processing function) can be used to record the effective current curve of the entire cycle of the sample elevator traction motor. At the same time, a logic module can be used to monitor the high and low level signals of the elevator operation main contactor coil (or a voltage probe can be used to monitor the voltage signal of the main contactor contact point, or the I / O output signal of the elevator main control board operation status), thereby determining the starting point mark 1 of each segment of the loading current waveform within the cycle.

[0108] Take the sample current waveform curve as the original envelope curve of the traction machine current as an example, Figure 9 As shown, an oscilloscope can be used to record the original envelope waveform of the current of the sample elevator traction motor throughout its entire cycle, while a logic module can be used to monitor the high and low level signals of the elevator's main contactor coil (or a voltage probe can be used to monitor the voltage signal at the main contactor contact point, or the I / O output signal of the elevator main control board's operating status), thereby determining the starting point mark 1 of each segment of the loaded current waveform.

[0109] After the waveform starting point of the sample current waveform curve is confirmed, the periodic current curve measured in the above steps can be read in sections to pick up the time of the key point and the amplitude of the corresponding section.

[0110] like Figure 8 、 Figure 9 As shown, with marker 1 as the starting point of each current segment, the corresponding time of the key points (markers 1 to 10) is further picked up. Then, the time period a(s) from marker 1 to marker 2, the time period b(s) from marker 2 to marker 3, the time period c(s) from marker 3 to marker 4, the time period d(s) from marker 4 to marker 5, the time period e(s) from marker 5 to marker 6, the time period f(s) from marker 6 to marker 7, the time period g(s) from marker 7 to marker 8, the time period h(s) from marker 8 to marker 9, and the time period i(s) from marker 9 to marker 10 can be calculated in sequence.

[0111] In the above, the present application identifies the curve between the waveform starting point and the first key point, and the curves between the remaining adjacent key points, as each segmented sample current curve. Further, the first current effective value of the stable segment curve in each segmented sample current curve can be obtained, such as Figure 8 、 Figure 9 As shown, when the elevator is fully loaded, it is powered upward and regenerative downward; when the elevator is unloaded, it is powered downward and regenerative upward: measure the effective value amplitude I of the current waveform during the c, e, and g periods when the elevator is powered. 梯c1 , I 梯e1 , I 梯g1 Furthermore, the effective value amplitude I of the current waveform in the time segments c, e, and g during the elevator regeneration can be measured respectively. 梯c2 , I 梯e2 , I 梯g2 It should be noted that the first current effective value may refer to the effective value amplitude of the current waveform.

[0112] Step 704 , reading the current waveform curve to be measured in sections to obtain each section of the current curve to be measured, and obtaining the second current effective value of the stable section curve in each section of the current curve to be measured;

[0113] Specifically, after obtaining the current waveform curve to be measured, the current waveform curve to be measured is read in sections to obtain each section of the current waveform curve to be measured; the present application obtains the key part of the current waveform curve to be measured by section reading.

[0114] In one embodiment, the current waveform curve to be measured includes any one of a traction machine effective value current curve and a traction machine current original envelope curve;

[0115] The step of reading the current waveform curve to be measured in segments to obtain the current curve to be measured in each segment includes:

[0116] Determine the starting point of the current waveform curve to be measured according to the received start command transmitted by the elevator control cabinet;

[0117] Starting from the waveform starting point, mark the key points in chronological order according to the waveform shape of the current waveform curve to be measured;

[0118] The curve between the waveform starting point and the first key point, and the curves between the remaining adjacent key points, are respectively identified as the current curves to be measured in each segment.

[0119] Specifically, an oscilloscope can be used to measure the simulated current of an elevator with the hoisting machine to be verified installed and the ground equivalent verification system unloaded. This current waveform represents a complete operating cycle. The measured cycle current curve is read in segments, and the time of key points and the current amplitude of the corresponding segment are selected.

[0120] The starting point of the waveform of the current waveform to be measured can be determined according to the start command transmitted by the elevator control cabinet. Figure 10 、 Figure 11 As shown, with marker 1 as the starting point of each current segment, the corresponding time of the key points (markers 1 to 10) is further picked up. The time period a(s) from marker 1 to marker 2, the time period b(s) from marker 2 to marker 3, the time period c(s) from marker 3 to marker 4, the time period d(s) from marker 4 to marker 5, the time period e(s) from marker 5 to marker 6, the time period f(s) from marker 6 to marker 7, the time period g(s) from marker 7 to marker 8, the time period h(s) from marker 8 to marker 9, and the time period i(s) from marker 9 to marker 10 can be calculated in sequence.

[0121] After obtaining the current curves of each segment to be measured, the second current effective value of the stable segment curve in each segment to be measured can be obtained. In some examples, the present application can respectively measure the effective value amplitude of the current waveform in the c, e, and g segments when the elevator is going up and down in the elevator ground equivalent verification system. Further, the average value I of the effective value of the current in the c, e, and g segments of the elevator going up and down in the elevator ground equivalent verification system is taken. 台c , I 台e , I 台g .

[0122] Step 706: Obtain the effective value of the traction machine current on the load side according to the first effective value of the current and the second effective value of the current, and convert the effective value of the traction machine current into a torque value;

[0123] Specifically, after obtaining the first current effective value and the second current effective value, the load-side traction machine current effective value can be obtained.

[0124] In some examples, the effective values ​​of the current of each segment obtained from the sample elevator side and the device to be verified side are combined to calculate the corresponding effective values ​​of the traction machine current required on the load side of segments a, c, e, g, and i.

[0125] (1) When the elevator is powered (when the traction machine is powered):

[0126] Current value of segments a, e, i: I 负载e1 =I 梯e1 -I 台e

[0127] Current value of section c: I 负载c1 =I 梯c1 -I 台c

[0128] Current value of g segment: I 负载g1 =I 梯g1 -I 台g

[0129] (2) When the elevator is regenerating (when the traction machine is generating electricity):

[0130] Current value of segments a, e, i: I 负载e2 =I 梯e2 +I 台e

[0131] Current value of section c: I 负载c2 =I 梯c2 +I 台c

[0132] Current value of g segment: I 负载g2 =I 梯g2 +I 台g

[0133] Furthermore, according to the current-torque characteristic curve of the elevator traction motor (traction motor current-torque model), the effective current value I corresponding to each point on the load side measured above can be converted to 负载 Converted into load side torque value T 负载 , the direction is reversed.

[0134] Step 708 : Based on the torque value, a torque loading curve is determined according to the curve parameters of the transition curve in each segmented sample current curve and the curve parameters of the transition curve in each segmented current curve to be measured.

[0135] Specifically, after obtaining the torque value (the torque value required to be loaded by the load motor), the torque loading curve can be determined based on the curve parameters of the transition section curve in each segmented sample current curve and the curve parameters of the transition section curve in each segmented current curve to be tested.

[0136] In some examples, the curve parameters may include a slope; specifically, according to the slopes of segments b, d, f, and h, a load motor torque command curve T is generated. 曲线1 (corresponding to the elevator power running), T 曲线2 (corresponding to the elevator recovery). Figure 12 、 Figure 13 As shown:

[0137] (1) When the elevator is powered (when the traction machine is powered):

[0138] The slope of the loading moment of section b is k b =(T 负载c1 -T 负载a1 ) / b;

[0139] The slope of the loading moment of segment d is k d =(T 负载e1 -T 负载c1 ) / d;

[0140] The slope of the loading moment of segment f is k f =(T 负载g1 -T 负载e1 ) / f;

[0141] The slope of the loading moment of segment h is k h =(T 负载i1 -T 负载g1 ) / h;

[0142] (2) When the elevator is regenerating (when the traction machine is generating electricity):

[0143] The slope of the loading moment of section b is k b =(T 负载c2 -T 负载a2 ) / b;

[0144] The slope of the loading moment in segment d is k d =(T 负载e2 -T 负载c2 ) / d;

[0145] The slope of the loading moment of segment f is k f =(T 负载g2 -T 负载e2 ) / f;

[0146] The slope of the loading moment of segment h is k h =(T 负载i2 -T 负载g2 ) / h;

[0147] The above torque curve can be converted into a load motor current curve according to the current-torque characteristic curve of the load motor (traction machine current torque model).

[0148] Generate load motor torque command T on the elevator ground equivalent verification system 曲线1 、T 曲线2 Loading (verification control equipment can convert torque and current according to the above steps, and then output current analog instructions to the inverter), it can monitor whether the deviation between the current value of the traction motor to be verified and the current value of the traction motor on the sample elevator meets the requirements. If it does not meet the requirements, it can be further accurately corrected.

[0149] In one embodiment, in response to the load motor entering the load loading state, the step of obtaining the verification result of the device to be verified may include:

[0150] In response to the load motor entering the load loading state, the current deviation of the traction motor to be verified is obtained; the current deviation of the traction motor to be verified is obtained according to the current value of the traction motor to be verified and the current value of the traction motor in the sample elevator;

[0151] Confirm whether the current deviation meets the deviation requirements;

[0152] If the current deviation meets the deviation requirement, the torque loading curve is determined as the test curve;

[0153] If the current deviation does not meet the deviation requirement, the torque loading curve is corrected until a corrected torque loading curve is obtained so that the current deviation meets the deviation requirement, and the corrected torque loading curve is determined as the test curve;

[0154] The test curve is used to perform load verification on the device to be verified to obtain the verification result.

[0155] Specifically, the present application can monitor whether the deviation between the current value of the traction machine to be verified and the current value of the traction machine on the sample elevator meets the requirements, and if it does not meet the requirements, it can be further accurately corrected.

[0156] In one embodiment, if the current deviation does not meet the deviation requirement, the step of correcting the torque loading curve includes:

[0157] Obtain the rated current of the traction machine and the rated torque corresponding to the rated current of the traction machine;

[0158] The ratio of rated torque to rated current of the traction machine is determined as the resolution;

[0159] The compensation torque is obtained according to the current deviation value and the resolution; the current deviation value includes the difference between the first current effective value and the second current effective value when the torque loading curve is adopted;

[0160] The compensation torque is used to correct the torque loading curve to obtain a corrected torque loading curve.

[0161] Specifically, the rated current Ie (A) and the corresponding rated torque Te (Nm) of the elevator traction machine can be obtained, and the resolution of the traction machine current and torque δ = Te / Ie (Nm / A) can be confirmed. Then, the deviation values ​​ΔIc, ΔIe, and ΔIg of the effective current values ​​of segments c, e, and g (the device to be verified and the sample elevator) are compared respectively to calculate the secondary compensation torque T 修C 、T 修e 、T 修g (Nm), calculated as T 修 =ΔI*δ.

[0162] Furthermore, the torque values ​​T of segments c, e, and g are modified. 负载c 、T 负载e 、T 负载g , get T 负载修c 、T 负载修e 、T 负载修g :

[0163] T 负载修c =T 负载c ±T 修c ;

[0164] T 负载修e =T 负载e ±T 修e ;

[0165] T 负载修g =T 负载g ±T 修g ;

[0166] The positive and negative signs are determined by the difference between the sample elevator current and the current on the device to be verified. A positive value is +, and a negative value is -. The curve can be generated by converting the current-torque characteristic curve of the load motor to obtain the corrected torque command curve T 曲线修1 、T 曲线修2 .

[0167] Furthermore, the load is applied according to this corrected torque, and the deviation between the current value of the traction motor to be verified and the current value of the sample elevator is monitored again to see if it meets the requirements. If not, it is iteratively corrected according to the above method. This application applies the load motor torque according to the corrected torque command curve that meets the requirements, and performs combined loading according to the operating cycle and timing set by the elevator to achieve performance and life verification of the electrical drive system under different modes.

[0168] Furthermore, the loading verification mode in this application may include:

[0169] Determine the operating cycle pattern of the elevator control cabinet in the device to be verified (e.g., bottom layer ←→ top layer; bottom layer → n1 layer → n2 layer, etc.), marking the loading torque curve from the 1st to the nth segment. Verify that the control device outputs periodic loading commands according to the corresponding operating sequence.

[0170] The elevator control cabinet operates according to the set cycle. Each operation process is as follows: the start command (nth section) is issued → the main contactor is energized → the starting compensation torque is given → the traction machine brake is opened → the elevator operation command is issued → the speed and distance are controlled according to the preset S shape → the elevator stops and the brake is lowered → the parking zero speed holding torque is canceled.

[0171] The load simulation device is loaded according to the instructions given by the verification control equipment. Each loading process is as follows: receiving the start command of the control cabinet → main contactor is attracted → load motor torque is loaded according to the set (nth section) curve → receiving the elevator stop signal → canceling the loading torque.

[0172] For further explanation of this application, please refer to Figure 14 As shown in the flowchart of . As described above, the present application determines the effective value of the traction motor current on the load side by reading the effective value of the current of the stable section curve in the current curve in segments, and then obtains an accurate load motor loading torque curve based on the curve parameters of the transition section curve in the current curve, truly simulates the elevator operation conditions, and realizes the matching verification of the reliability of the control cabinet under development; the present application can be used for performance verification such as the power cycle and thermal cycle life of the power module in the main circuit, and can also be used for verification of the elevator's peak operation conditions such as going on and off duty, without occupying shaft resources, shortening the verification cycle and reducing resource consumption.

[0173] In one embodiment, Figure 15 As shown, the step of determining the torque loading curve according to the sample current waveform curve and the current waveform curve to be measured may include:

[0174] Step 802 , performing format conversion on the sample current waveform curve and the current waveform curve to be measured, respectively, to obtain the sample current waveform curve after format conversion and the current waveform curve to be measured after format conversion;

[0175] Step 804 , using the traction machine current torque model, converting the format-converted sample current waveform into a basic torque curve, and converting the format-converted current waveform curve to be measured into a torque compensation curve;

[0176] Step 806 : Obtain a torque loading curve based on the torque compensation curve and the basic torque curve.

[0177] Specifically, the present application can obtain the complete current curve waveform of an elevator sample (sample elevator) in one operating cycle according to a prescribed mode and determine the starting point of the elevator's one-way operating waveform.

[0178] like Figure 16 As shown, an oscilloscope (with RMS processing function) can be used to record the effective current curve of the entire cycle of the sample elevator traction motor; at the same time, a logic module is used to monitor the high and low level signals of the elevator operation main contactor coil (or a voltage probe is used to monitor the voltage signal of the main contactor contact point), thereby determining the starting point (and ending point) of the loading current waveform of each single-trip operation within the cycle.

[0179] Convert the sample current waveform into a curve in a corresponding format (for example, Excel format), and then convert the sample current effective value curve into a torque curve according to the current-torque characteristic curve of the elevator traction motor. Use these two torque curves as the basic torque curve T loaded by the ground equivalent device load inverter. 负载1 (corresponding to the elevator power running), T 负载2 (corresponding to the elevator recovery).

[0180] like Figure 17 As shown, after the traction machine to be verified is installed, the effective value of the complete running current of the device to be verified is recorded with an oscilloscope when the elevator ground equivalent verification system is not loaded, and the starting point of the single-way running waveform of the device to be verified (the current waveform curve to be measured) is determined; the current waveform curve to be measured is converted into a curve in a corresponding format (for example, Excel format), and according to the current-torque characteristic curve of the elevator traction machine motor, the current waveform curve to be measured in Excel format is converted into a load motor torque compensation curve T 负载补偿 ;

[0181] Furthermore, the load motor torque compensation curve does not distinguish between elevator power running and elevator regeneration, and one of the single-trip running (a or b) current compensation curves can be taken as a representative.

[0182] Load side torque command curve = -(T 负载1、2 ±T 负载补偿 )

[0183] (1) When the elevator is powered (when the traction machine is powered):

[0184] Generate torque command T curve 1 = -(T 负载1 -T 负载补偿 );

[0185] (2) When the elevator is regenerating (when the traction machine is generating electricity):

[0186] Generate torque command T curve 2 = -(T 负载2 +T 负载补偿 );

[0187] The load motor torque is loaded according to the generated load-side torque command curve. According to the elevator's operating cycle mode, different segments of the command curve can be set and combined loading can be performed in a certain sequence to achieve performance and life verification of the electrical drive system under different modes.

[0188] This application can obtain an accurate load motor loading torque curve, truly simulate the elevator operating conditions, and realize matching verification of the reliability of the control cabinet under development, especially the performance verification of the power cycle and thermal cycle life of the power module in its main circuit. At the same time, it can verify the peak operating conditions of the elevator during rush hour and off-duty hours without occupying well resources, shortening the verification cycle and reducing resource consumption.

[0189] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0190] Based on the same inventive concept, embodiments of the present application further provide an elevator drive system equivalence verification device for implementing the aforementioned elevator drive system equivalence verification method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations in one or more embodiments of the elevator drive system equivalence verification device provided below can be found in the above-described limitations of the elevator drive system equivalence verification method and will not be further elaborated here.

[0191] In one embodiment, Figure 18 As shown, an elevator drive system equivalent verification device is provided, which is applied to the verification control device in the elevator ground equivalent verification system; the elevator ground equivalent verification system is used to install the device to be verified, and the device to be verified includes a traction machine and an elevator control cabinet; the elevator ground equivalent verification system includes a load motor connected to the traction machine to be verified, and the verification control device is connected to the load motor through the load control cabinet, and is connected to the traction machine to be verified through the elevator control cabinet; the elevator drive system equivalent verification device includes:

[0192] The sample curve acquisition module 110 is used to process the running current curve data of the traction machine in the sample elevator during the running cycle to obtain a sample current waveform curve;

[0193] The test curve acquisition module 120 is used to obtain the current curve data of the traction machine to be verified during the operation cycle when the test conditions are met and the start command transmitted by the elevator control cabinet is received, and process the current curve data of the traction machine to be verified to obtain the current waveform curve to be tested. The test conditions include that the load motor is in an unloaded state relative to the traction machine to be verified;

[0194] The loading curve acquisition module 130 is used to determine the torque loading curve according to the sample current waveform curve and the current waveform curve to be measured;

[0195] The command output module 140 is used to output a torque command according to the torque loading curve; the torque command is used to instruct the load control cabinet to drive the load motor to enter the load loading state;

[0196] The verification module 150 is configured to obtain a verification result of the device to be verified in response to the load motor entering a load loading state.

[0197] In one embodiment, the loading curve acquisition module includes:

[0198] The sample curve segmented reading module is used to read the sample current waveform curve segment by segment to obtain each segmented sample current curve and obtain the first current effective value of the stable segment curve in each segmented sample current curve;

[0199] The test curve segment reading module is used to read the test current waveform curve segment by segment, obtain each segment of the test current curve, and obtain the second current effective value of the stable segment curve in each segment of the test current curve;

[0200] A torque conversion module, configured to obtain an effective value of the traction machine current on the load side according to the first effective value of the current and the second effective value of the current, and convert the effective value of the traction machine current into a torque value;

[0201] The curve confirmation module is used to determine the torque loading curve based on the torque value, according to the curve parameters of the transition section curve in each segmented sample current curve and the curve parameters of the transition section curve in each segmented current curve to be measured.

[0202] In one embodiment, the sample current waveform curve includes any one of a traction machine effective value current curve and a traction machine current original envelope curve;

[0203] The sample curve segmented reading module is used to determine the waveform starting point of the sample current waveform curve by monitoring the operating signal of the sample elevator; starting from the waveform starting point, each key point is marked in sequence based on the waveform shape of the sample current waveform curve based on time sequence; the curve between the waveform starting point and the first key point, as well as the curves between the remaining adjacent key points, are respectively confirmed as each segmented sample current curve.

[0204] In one embodiment, the current waveform curve to be measured includes any one of the effective value current curve of the traction machine and the original envelope curve of the traction machine current; the segmented reading module of the curve to be measured is used to determine the waveform starting point of the current waveform curve to be measured according to the start instruction transmitted by the elevator control cabinet; starting from the waveform starting point, each key point is marked in sequence based on the waveform shape of the current waveform curve to be measured based on the time sequence; the curve between the waveform starting point and the first key point, and the curves between the remaining adjacent key points are respectively confirmed as each segmented current curve to be measured.

[0205] In one embodiment, the curve parameter includes a slope; the operation cycle includes a power operation phase and a regenerative operation phase; and the verification module includes:

[0206] The deviation acquisition module is used to obtain the current deviation of the traction motor to be verified in response to the load motor entering the load loading state; the current deviation of the traction motor to be verified is obtained based on the current value of the traction motor to be verified and the current value of the traction motor in the sample elevator;

[0207] The deviation confirmation module is used to confirm whether the current deviation meets the deviation requirement; if the current deviation meets the deviation requirement, the torque loading curve is determined as the test curve;

[0208] a correction module, configured to correct the torque loading curve if the current deviation does not meet the deviation requirement, until a corrected torque loading curve is obtained in which the current deviation meets the deviation requirement, and determine the corrected torque loading curve as the test curve;

[0209] The verification result acquisition module is used to perform load verification on the device to be verified using a test curve to obtain a verification result.

[0210] In one embodiment, a correction module is used to obtain the rated current of the traction machine and the rated torque corresponding to the rated current of the traction machine; the ratio of the rated torque to the rated current of the traction machine is confirmed as the resolution; the compensation torque is obtained according to the current deviation value and the resolution; the current deviation value includes the difference between the first current effective value and the second current effective value when the torque loading curve is used; the torque loading curve is corrected using the compensation torque to obtain the corrected torque loading curve.

[0211] In one embodiment, the loading curve acquisition module includes:

[0212] a format conversion module, configured to convert the formats of the sample current waveform curve and the current waveform curve to be measured, respectively, to obtain the sample current waveform curve after format conversion and the current waveform curve to be measured after format conversion;

[0213] The torque curve acquisition module is used to convert the sample current waveform after format conversion into a basic torque curve using the traction machine current torque model, and convert the current waveform curve to be measured after format conversion into a torque compensation curve; based on the torque compensation curve and the basic torque curve, a torque loading curve is obtained.

[0214] Each module in the elevator drive system equivalence verification device described above can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in hardware form, or can be stored in a computer device memory in software form, so that the processor can call and execute the corresponding operations of each module.

[0215] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned elevator drive system equivalent verification method are implemented.

[0216] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above-mentioned elevator drive system equivalence verification method when executed by a processor.

[0217] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0218] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0219] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for equivalent verification of an elevator drive system, characterized in that: The method is applied to a verification control device in an elevator ground equivalence verification system; the elevator ground equivalence verification system is used to install a device to be verified, and the device to be verified includes a traction machine to be verified and an elevator control cabinet; the elevator ground equivalence verification system includes a load motor connected to the traction machine to be verified, and the verification control device is connected to the load motor through the load control cabinet, and is connected to the traction machine to be verified through the elevator control cabinet; the method includes: Processing the running current curve data of the traction machine in the sample elevator during the running cycle to obtain a sample current waveform curve; When the test conditions are met and a start command transmitted by the elevator control cabinet is received, current curve data of the hoisting machine to be verified during an operation cycle is obtained, and the current curve data of the hoisting machine to be verified is processed to obtain a current waveform curve to be measured; the test conditions include that the load motor is in an unloaded state relative to the hoisting machine to be verified; According to the sample current waveform curve and the current waveform curve to be measured, a torque loading curve is determined by a first method or a second method; the first method is: format conversion is performed on the sample current waveform curve and the current waveform curve to be measured, respectively, to obtain a sample current waveform curve after format conversion and a current waveform curve to be measured after format conversion; the sample current waveform after format conversion is converted into a basic torque curve T corresponding to the elevator when the elevator is in operation by using a traction machine current torque model 负载1 , corresponding to the basic torque curve T when the elevator is regenerated 负载2 , convert the measured current waveform curve after the format conversion into the torque compensation curve T 负载补偿 Based on the torque compensation curve T 负载补偿 , the basic torque curve T 负载1 and the basic torque curve T 负载2 , obtain the torque loading curve; According to the torque loading curve, a torque instruction is output; the torque instruction is used to instruct the load control cabinet to drive the load motor to enter the load loading state; the torque instruction is expressed as a load-side torque instruction curve, and the load-side torque instruction curve corresponding to the first mode when the elevator is in operation is =-(T 负载1 - T 负载补偿 ), the load side torque command curve corresponding to the first mode during elevator regeneration = -(T 负载2 + T 负载补偿 ); In response to the load motor entering the load loading state, a verification result of the device to be verified is obtained.

2. The method according to claim 1, characterized in that The second method is: Reading the sample current waveform curve in sections to obtain each section sample current curve, and obtaining a first current effective value of a stable section curve in each section sample current curve; The current waveform curve to be measured is read in sections to obtain each section of the current curve to be measured, and a second current effective value of a stable section curve in each section of the current curve to be measured is obtained; Obtaining a load-side traction machine current effective value according to the first current effective value and the second current effective value, and converting the traction machine current effective value into a torque value; Based on the torque value, the torque loading curve is determined according to curve parameters of the transition section curve in each of the segmented sample current curves and curve parameters of the transition section curve in each of the segmented current curves to be measured; the curve parameters include slope.

3. The method according to claim 2, characterized in that The sample current waveform curve includes any one of a traction machine effective value current curve and a traction machine current original envelope curve; The step of reading the sample current waveform curve in sections to obtain each section of the sample current curve includes: Determining a waveform starting point of the sample current waveform curve by monitoring the operating signal of the sample elevator; Taking the waveform starting point as the starting point, marking each key point in sequence based on the waveform shape of the sample current waveform curve in chronological order; The curve between the waveform starting point and the first key point, and the curves between the remaining adjacent key points, are respectively identified as the segmented sample current curves.

4. The method according to claim 2, characterized in that The current waveform curve to be measured includes any one of a traction machine effective value current curve and a traction machine current original envelope curve; The step of reading the current waveform curve to be measured in sections to obtain each section of the current curve to be measured includes: Determining a waveform starting point of the current waveform curve to be measured according to the received start instruction transmitted by the elevator control cabinet; Taking the waveform starting point as the starting point, marking each key point in chronological order according to the waveform shape of the current waveform curve to be measured; The curve between the starting point of the waveform and the first key point, and the curves between the remaining adjacent key points, are respectively identified as the segmented current curves to be measured.

5. The method according to any one of claims 2 to 4, characterized in that The operation cycle includes a power operation phase and a regenerative operation phase; The step of obtaining the verification result of the device to be verified in response to the load motor entering the load loading state includes: In response to the load motor entering the load loading state, obtaining a current deviation of the hoisting machine to be verified; the current deviation of the hoisting machine to be verified is obtained based on a current value of the hoisting machine to be verified and a current value of the hoisting machine in the sample elevator; Confirm whether the current deviation meets the deviation requirement; If the current deviation satisfies the deviation requirement, determining the torque loading curve as a test curve; If the current deviation does not meet the deviation requirement, the torque loading curve is corrected until a corrected torque loading curve is obtained so that the current deviation meets the deviation requirement, and the corrected torque loading curve is determined as the test curve; The test curve is used to perform load verification on the device to be verified to obtain the verification result.

6. The method according to claim 5, characterized in that If the current deviation does not meet the deviation requirement, the step of correcting the torque loading curve includes: Obtaining a rated current of the traction machine and a rated torque corresponding to the rated current of the traction machine; The ratio of the rated torque to the rated current of the traction machine is determined as the resolution; Obtaining a compensation torque according to the current deviation value and the resolution; the current deviation value includes a difference between the first current effective value and the second current effective value when the torque loading curve is adopted; The compensation torque is used to correct the torque loading curve to obtain the corrected torque loading curve.

7. An elevator drive system equivalent verification device, characterized in that: The device is applied to the verification control device of the elevator ground equivalence verification system; the elevator ground equivalence verification system is used to install the device to be verified, and the device to be verified includes a traction machine and an elevator control cabinet; the elevator ground equivalence verification system includes a load motor connected to the traction machine to be verified, and the verification control device is connected to the load motor through the load control cabinet, and is connected to the traction machine to be verified through the elevator control cabinet; The elevator drive system equivalent verification device includes: The sample curve acquisition module is used to process the running current curve data of the traction machine in the sample elevator during the running cycle to obtain the sample current waveform curve; a curve acquisition module to be tested, configured to acquire current curve data of the hoisting machine to be verified within an operating cycle and process the current curve data of the hoisting machine to be verified to obtain a current waveform curve to be tested, when a test condition is met and a start command transmitted by the elevator control cabinet is received; the test condition includes that the load motor is in an unloaded state relative to the hoisting machine to be verified; The loading curve acquisition module is used to determine the torque loading curve according to the sample current waveform curve and the current waveform curve to be measured using a first method or a second method; the first method is: respectively converting the format of the sample current waveform curve and the current waveform curve to be measured to obtain the sample current waveform curve after format conversion and the current waveform curve to be measured after format conversion; using the traction machine current torque model, the sample current waveform after format conversion is converted into the basic torque curve T corresponding to the elevator when it is in power operation 负载1 , corresponding to the basic torque curve T when the elevator is regenerated 负载2 , convert the measured current waveform curve after the format conversion into the torque compensation curve T 负载补偿 Based on the torque compensation curve T 负载补偿 , the basic torque curve T 负载1 and the basic torque curve T 负载2 , obtain the torque loading curve; The command output module is used to output a torque command according to the torque loading curve; the torque command is used to instruct the load control cabinet to drive the load motor to enter the load loading state; the torque command is expressed as a load-side torque command curve, and the load-side torque command curve corresponding to the first mode when the elevator is in power operation = -(T 负载1 - T 负载补偿 ), the load side torque command curve corresponding to the first mode during elevator regeneration = -(T 负载2 + T 负载补偿 ); The verification module is configured to obtain a verification result of the device to be verified in response to the load motor entering the load loading state.

8. A verification control device, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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