Noise reduction method of elevator brake and elevator

Abstract

The application provides a noise reduction method of an elevator brake and an elevator. The noise reduction method comprises the following steps: calculating control parameters of a control power supply according to basic parameters of the brake; obtaining voltage, current and noise sensor information output by the control power supply when the control power supply is started according to the control parameters; calculating a maximum starting noise value in a starting duration of the control power supply and a maximum brake noise value in a brake duration according to the voltage, current and noise sensor information output by the control power supply; and adjusting the control parameters of the control power supply according to the maximum starting noise value and the maximum brake noise value. The application calculates the maximum starting noise value and the maximum brake noise value based on the voltage, current and noise sensor information output by the control power supply, and adjusts the operation parameters of the control power supply based on the maximum starting noise value and the maximum brake noise value, so that the brake action is more gentle, thereby achieving the purpose of reducing noise.

Description

Technical Field

[0001] This invention belongs to the field of elevator brake noise reduction technology, specifically relating to a noise reduction method for elevator brakes and an elevator. Background Technology

[0002] When the elevator is running, the brake on the traction machine is opened, and when it stops, the brake is closed. When the brake is activated, it will generate noise due to the collision with the mechanical limit components. This collision noise will be transmitted in the elevator shaft and affect the life and rest of the building's residents.

[0003] Existing brake noise reduction technologies generally focus on reducing noise along the transmission path or at the noise source. Noise reduction along the transmission path involves adding sound-absorbing cotton inside the shaft, a traditional but effective method, albeit costly. Noise reduction at the noise source includes using new materials to reduce brake noise; this method requires significant R&D investment and is costly, making it difficult to promote. Another method is to optimize the brake's mechanical structure, adding buffer mechanisms or vibration damping designs to reduce noise, but this involves complex manufacturing processes and is inconvenient to adjust. Summary of the Invention

[0004] To overcome the above-mentioned technical defects, the present invention provides a noise reduction method for elevator brakes and an elevator, which can reduce the cost of noise reduction.

[0005] To solve the above problems, the present invention is implemented according to the following technical solution:

[0006] A method for reducing noise in an elevator brake, comprising the following steps:

[0007] S1. Calculate the control parameters of the control power supply based on the basic parameters of the brake;

[0008] S2. When the control power supply starts according to the control parameters, acquire the voltage, current and noise sensor information output by the control power supply;

[0009] S3. Based on the voltage, current and noise sensor information of the control power supply output, calculate the maximum start-up noise value during the start-up duration and the maximum shutdown noise value during the shutdown duration.

[0010] S4. Adjust the control parameters of the control power supply according to the maximum starting noise value and the maximum closing noise value during the closing duration.

[0011] As a further improvement of the present invention, the control parameters of the control power supply include: starting voltage, starting duration, shut-off voltage, and shut-off duration.

[0012] The step of adjusting the control parameters of the control power supply based on the maximum start-up noise value and the maximum shutdown noise value during the shutdown duration includes:

[0013] When the maximum startup noise value occurs in the first time period of the startup duration, the weighting coefficients of the startup voltage and startup duration are reduced, and the startup voltage and startup duration are updated according to the reduced weighting coefficients of the startup voltage and startup duration.

[0014] When the maximum shutdown noise value occurs in the first time period of the shutdown duration, the weighting factor of the shutdown voltage is increased and the weighting factor of the shutdown duration is decreased. The shutdown voltage and shutdown duration are then updated based on the increased weighting factors of the shutdown voltage and shutdown duration.

[0015] As a further improvement of the present invention, the step of adjusting the control parameters of the control power supply according to the maximum start-up noise value and the maximum shutdown noise value during the shutdown duration further includes:

[0016] When the maximum startup noise value occurs in the second time period of the startup duration, the weighting coefficient of the startup voltage and the weighting coefficient of the startup duration are increased, and the startup voltage and startup duration are updated according to the increased weighting coefficients of the startup voltage and the startup duration.

[0017] When the maximum shutdown noise value occurs in the second time period of the shutdown duration, the weighting coefficient of the shutdown voltage is reduced and the weighting coefficient of the shutdown duration is increased. The shutdown voltage and shutdown duration are then updated based on the reduced weighting coefficients of the shutdown voltage and shutdown duration.

[0018] As a further improvement of the present invention, the present invention also includes the following steps:

[0019] S5. If the rate of change of the weighting coefficient of the starting voltage, the weighting coefficient of the starting duration, the weighting coefficient of the shut-off voltage, and the weighting coefficient of the shut-off duration are all greater than or equal to the first set value, then return to step S2 to continue the loop execution, wherein the control power supply starts according to the adjusted control parameters.

[0020] As a further improvement of the present invention, the present invention also includes the following steps:

[0021] S6. If the rate of change of the weighting coefficient of the starting voltage, the weighting coefficient of the starting duration, the weighting coefficient of the shut-off voltage, and the weighting coefficient of the shut-off duration are all less than the first set value, then a debugging completion signal is generated.

[0022] As a further improvement of the present invention, if the number of times the control parameter is adjusted is greater than the second set value, an adjustment failure signal is generated.

[0023] As a further improvement of the present invention, if the maximum starting noise value of the current round is less than the maximum starting noise value of the previous round, the weighting coefficient of the starting voltage is increased according to the rate of change of the weighting coefficient of the previous round.

[0024] If the maximum starting noise value of the current cycle is greater than the maximum starting noise value of the previous cycle, the weighting coefficient of the starting voltage will be reduced according to the rate of change of the weighting coefficient of the previous cycle.

[0025] As a further improvement of the present invention, if the maximum shutdown noise value of the current round is less than the maximum startup noise value of the previous round, the weighting coefficient of the shutdown voltage is increased according to the rate of change of the weighting coefficient of the previous round.

[0026] If the maximum shutdown noise value of the current cycle is greater than the maximum startup noise value of the previous cycle, the weighting coefficient of the shutdown voltage will be reduced according to the rate of change of the weighting coefficient of the previous cycle.

[0027] As a further improvement of the present invention, the present invention also includes the following steps:

[0028] The updated starting voltage is verified, and the weighting coefficient of the starting voltage is adjusted until the starting voltage meets the limit value.

[0029] The updated shutdown voltage is verified, and the weighting coefficient of the shutdown voltage is adjusted until the shutdown voltage meets the limit value.

[0030] The present invention also provides an elevator, the elevator including a processor and a memory, the memory storing at least one instruction, the at least one instruction being loaded and executed by the processor to implement the above-described noise reduction method.

[0031] Compared with the prior art, the present invention has the following beneficial effects: The present invention monitors the voltage, current and noise sensor information of the control power supply output in real time, and calculates the maximum starting noise value and the maximum closing noise value during the closing duration based on this information. The operating parameters of the control power supply are adjusted based on the maximum starting noise value and the maximum closing noise value, so as to make the brake action smoother and thus achieve the purpose of reducing noise. The present invention achieves noise reduction based on electrical control, without the need to add additional sound insulation cotton or new materials, which can reduce costs and facilitate adjustment. Attached Figure Description

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0033] Figure 1 This is a flowchart of the noise reduction method described in Example 1;

[0034] Figure 2 This is a partial structural diagram of the elevator described in Example 1. Detailed Implementation

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] Example 1

[0037] This embodiment provides a noise reduction method for elevator brakes, such as... Figure 1 As shown, the steps include:

[0038] S1. Based on the basic parameters of the brake, calculate the control parameters of the control power supply. The basic parameters include: rated starting current I... Qn Rated holding current I Wn The coil resistance R; the control parameters that need to be calculated for the control power supply include: starting voltage V. Q and sustaining voltage V W .

[0039] S2. When the control power supply starts according to the control parameters, acquire the voltage, current and noise sensor information output by the control power supply.

[0040] Specifically, before the control power supply is started for the first time, the start-up duration T of the control power supply needs to be set. Q Sustaining voltage V W Duration T W , gate closure duration T G At the same time, the starting voltage V calculated in step S1 is... Q and sustaining voltage V W Write to the control power supply, and the control power supply first outputs the startup voltage V. Q The start-up duration T is reached. Q Then switch to sustaining voltage V W , reaching the maintenance time T W Then, switch to the shutdown voltage V. G The gate closure duration T is reached. G After that, the output voltage is cut off to zero. It should be noted that throughout the entire process, it is necessary to acquire the voltage, current and noise sensor information of the control power supply output.

[0041] S3. Calculate the control power supply start-up duration T based on the voltage, current, and noise sensor information output by the control power supply. Q Maximum starting noise value and shutdown duration T G The maximum gate shutdown noise value within;

[0042] S4. Based on the maximum starting noise value and the shutdown duration T GThe maximum shutdown noise level within the control power supply is adjusted by the following control parameters: starting voltage V. Q Startup duration T Q , shutdown voltage V G , gate closure duration T G As one implementation method, a neural network algorithm can be used to adjust the control parameters, including the following adjustment logic:

[0043] When the maximum startup noise value occurs during startup duration T Q If the brake opens too quickly during the first time period, it indicates that the starting voltage V needs to be reduced. Q Weight coefficient K QV and start-up duration T Q Weight coefficient K QT According to the reduced weight coefficient K QV and start-up duration T Q Weight coefficient K QT Update startup voltage V Q Startup duration T Q Starting voltage V Q Multiply by the starting voltage V Q Weight coefficient K QV The new starting voltage V is then obtained. Q Startup duration T Q Multiply by the start-up duration T Q Weight coefficient K QT The new start-up duration T is then obtained. Q ;

[0044] When the maximum shutdown noise value occurs during shutdown duration T G If the first time interval is too short, it indicates that the brake is closing too quickly, and the closing voltage V needs to be increased. G Weight coefficient K GV Reduce the gate closure duration T G Weight coefficient K GT According to the increased shut-off voltage V G Weight coefficient K GV and the duration of gate closure T G The weighting coefficients are updated to control the gate voltage V. G and the duration of gate closure T G Closing voltage V G Multiply by the shutdown voltage V G Weight coefficient K GV The new shutdown voltage V is then obtained. G The duration of the gate closure, T G Multiply by the gate closure duration T G Weight coefficient K GT The new gate closure duration T is then obtained.G .

[0045] When the maximum startup noise value occurs during startup duration T Q During the second time period, it indicates that the brake is opening slowly. In this case, it is necessary to increase the starting voltage V. Q Weight coefficient K QV and start-up duration T Q Weight coefficient K QT Based on the increased starting voltage V Q Weight coefficient K QV and start-up duration T Q Weight coefficient K QT Update startup voltage V Q Startup duration T Q Starting voltage V Q Multiply by the starting voltage V Q Weight coefficient K QV The new starting voltage V is then obtained. Q Startup duration T Q Multiply by the start-up duration T Q Weight coefficient K QT The new start-up duration T is then obtained. Q ;

[0046] When the maximum shutdown noise value occurs during shutdown duration T G During the second time period, it indicates that the brake is closing slowly, and the closing voltage V needs to be reduced. G Weight coefficient K GV and the duration of gate closure T G Weight coefficient K GT According to the reduced shutdown voltage T G Weight coefficient K GT Increase the gate closure duration T G Weight coefficient K GT Update the shutdown voltage and shutdown duration T G Closing voltage V G Multiply by the shutdown voltage V G Weight coefficient K GV The new shutdown voltage V is then obtained. G The duration of the gate closure, T G Multiply by the gate closure duration T G Weight coefficient K GT The new gate closure duration T is then obtained. G .

[0047] If the maximum starting noise value of the current cycle is less than the maximum starting noise value of the previous cycle, then the starting voltage V Q Weight coefficient dK QVIf it is better, then it can continue to be increased according to the rate of change of the previous weighting coefficient, such as the weighting coefficient K. QV If further improvement is desired, then the weighting coefficient K should be increased further. QV .

[0048] If the maximum starting noise value of the current cycle is greater than the maximum starting noise value of the previous cycle, then the starting voltage V Q Weight coefficient dK QV It's a negative increase; it's reduced according to the previous rate of change of the weighting coefficient, that is, the weighting coefficient K is adjusted in the opposite direction. QV Such as the weighting coefficient K QV If the increase is a negative improvement, then decrease the weighting coefficient K. QV .

[0049] If the maximum shutdown noise value of the current cycle is less than the maximum startup noise value of the previous cycle, then the shutdown voltage V G Weight coefficient dK GV It is better, based on the previous rate of change of the weighting coefficient dK. GV Improve;

[0050] If the maximum shutdown noise value of the current cycle is greater than the maximum startup noise value of the previous cycle, then the shutdown voltage V G Weight coefficient dK GV According to the previous rate of change of weighting coefficient dK GV Reduce it.

[0051] Verify the new starting voltage V Q If the voltage exceeds the maximum limit, then reduce the starting voltage V. Q Weight coefficient K QV Recalculate the new starting voltage V Q Continue to verify the new starting voltage V Q Is it greater than the sustaining voltage V? W If the starting voltage V Q Less than or equal to the sustaining voltage V W Then the starting voltage V needs to be increased. Q Weight coefficient K QV Recalculate the new starting voltage V Q Recalculate.

[0052] Verify the new shutdown voltage V G Is it greater than the sustaining voltage V? W If so, then the shutdown voltage V needs to be reduced. G Weight coefficient K GV The new shutdown voltage V is recalculated. G Continue to verify the new shutdown voltage V G Is it less than zero? If so, the shutdown voltage V needs to be increased.G Weight coefficient K GV The new shutdown voltage V is recalculated. G Recalculate.

[0053] S5, such as the starting voltage V Q Weight coefficient K QV Startup duration T Q Weight coefficient K QT , shutdown voltage V G Weight coefficient K GV , gate closure duration T G Weight coefficient K GT If the rate of change is greater than or equal to the first set value, then return to step S2 to continue the loop execution, wherein the control power supply starts according to the adjusted control parameters.

[0054] S6, such as the starting voltage V Q Weighting coefficients, start-up duration T Q Weight coefficient K QT , shutdown voltage V G Weight coefficient K GV , gate closure duration T G Weight coefficient K GT If the rate of change of all parameters is less than the first set value, the weighting coefficient is considered to have converged, the parameter adjustment is complete, the debugging ends, and a debugging completion signal is generated. If the number of times the control parameter is adjusted is greater than the second set value, the parameter adjustment is considered to have failed, the debugging ends, and an adjustment failure signal is generated. In this case, the brake needs to be manually inspected.

[0055] The following is a further explanation of this embodiment in conjunction with the specific implementation process:

[0056] Noise reduction methods are applied to include Figure 2 In the elevator with the structure shown, the elevator control system is equipped with a traction machine, a brake, an elevator control system, and a control power supply.

[0057] The elevator control system saves the basic parameters of the brake and sets the start-up duration T of the control power supply. Q Duration T is 3 seconds. W For 5 seconds, the shut-off voltage T G 50V, shutdown duration T G For a time of 2 seconds, the elevator control system calculates the starting voltage V of the brake based on the parameters. Q 120V, sustaining voltage V W The voltage is 80V, and the control power supply stores these control parameters.

[0058] The control power supply controls the output voltage according to the control parameters, first outputting the starting voltage V. Q120V, reaching the start-up duration T Q Switching to sustaining voltage V after 3 seconds W 80V, reaching the sustaining time T W After 5 seconds, switch back to the shutdown voltage V. G 50V, reaching the shutdown duration T G After 2 seconds, the output voltage is cut off to zero. During this output process, the control power supply records the real-time output current and feeds back the real-time data of the output voltage and current to the elevator control system. At the same time, the noise sensor also feeds back the noise sensor information to the elevator control system in real time.

[0059] The elevator control system simultaneously monitors the output voltage, current, and noise sensor information of the control power supply, and analyzes the start-up duration T. Q Maximum starting noise value and shutdown duration T G The maximum closing noise value is determined by the elevator control system, which adjusts parameters using a neural network algorithm. The weight coefficient of each parameter is set to 1 by default, and the algorithm follows these logical conditions:

[0060] When the maximum startup noise value occurs during startup duration T Q If the first third of the time period is too short, it indicates that the brake is opening too quickly, and the starting voltage V needs to be reduced. Q Weight coefficient K QV and start-up duration T Q Weight coefficient K QT For example, the weighting coefficient K QV Adjusted to 0.95, weighting coefficient K QT Adjust to 0.9, starting voltage V Q 120V multiplied by the weighting factor K QV The new starting voltage V is then obtained. Q 114V, startup duration T Q 3s multiplied by the weighting coefficient K QT The new start-up duration T is then obtained. Q 2.7s.

[0061] When the maximum startup noise value occurs during startup duration T Q The latter third of the time period indicates that the brake is opening slowly, requiring an increase in the starting voltage V. Q Weight coefficient K QV and start-up duration T Q Weight coefficient K QT For example, the weighting coefficient K QV Adjusted to 1.05, weighting coefficient K QT Adjusted to 1.1, starting voltage V Q 120V multiplied by the weighting factor K QV The new starting voltage V is then obtained.Q 126V, startup duration T Q 3s multiplied by the weighting coefficient K QT The new start-up duration T is then obtained. Q 3.3s.

[0062] When the maximum shutdown noise value occurs during shutdown duration T G If the first third of the time period is too short, it indicates that the brake is closing too quickly, and the closing voltage V needs to be increased. G Weight coefficient K GV Reduce the gate closure duration T G Weight coefficient K GT For example, the weighting coefficient K GV Adjusted to 1.05, weighting coefficient K GT Adjusted to 0.9, shut-off voltage V G 50V multiplied by the weighting factor K GV The new shutdown voltage V is then obtained. G 52.5V, shutdown duration T G 2s multiplied by the weighting coefficient K GT The new gate closure duration T is then obtained. G 1.8s.

[0063] When the maximum shutdown noise value occurs during shutdown duration T G The latter third of the time period indicates that the brake is closing slowly, and the closing voltage V needs to be reduced. G Weight coefficient K GV Increase the gate closure duration T G Weight coefficient K GT For example, the weighting coefficient K GV Adjusted to 0.95, weighting coefficient K GT Adjusted to 1.1, shut-off voltage V G 50V multiplied by the weighting factor K GV The new shutdown voltage V is then obtained. G 47.5V, shutdown duration T G 2s multiplied by the weighting coefficient K GT The new gate closure duration T is then obtained. G 2.2s.

[0064] If the maximum starting noise value of the current cycle is lower than the maximum starting noise value of the previous cycle, the starting voltage V Q The rate of change of the weighting coefficient dK QV It is better; continue adjusting according to this rate of change, such as the weighting coefficient K. QV If increasing it to 1.05 is better, then continue to increase the weighting coefficient K. QV If the maximum starting noise value of the current cycle is higher than the maximum starting noise value of the previous cycle, up to 1.06, the starting voltage V...Q The rate of change of the weighting coefficient dK QV If it's a negative increase, then adjust the weight coefficient K in the opposite direction. QV Such as the weighting coefficient K QV If increasing it to 1.05 is a negative improvement, then the weighting coefficient K should be reduced. QV Up to 1.04.

[0065] Similarly, if the maximum shutdown noise value in the current round is lower than the maximum shutdown noise value in the previous round, the shutdown voltage V G The rate of change of the weighting coefficient dK GV It is better; continue adjusting according to this rate of change, such as the weighting coefficient K. GV If increasing it to 1.05 is better, then continue to increase the weighting coefficient K. GV Up to 1.06, if the maximum shutdown noise value of the current round is higher than the maximum shutdown noise value of the previous round, the shutdown voltage V G The rate of change of the weighting coefficient dK GV If it's a negative increase, then adjust the weight coefficient K in the opposite direction. GV Such as the weighting coefficient K GV If increasing it to 1.05 is a negative improvement, then the weighting coefficient K should be decreased. GV Up to 1.04.

[0066] Verify the new starting voltage V Q Is the voltage greater than the maximum limit of 140V? If so, reduce the starting voltage V. Q Weight coefficient K QV Recalculate the new starting voltage V Q Continue to verify the new starting voltage V Q Is the sustaining voltage V greater than 80V? W If the starting voltage V Q Less than or equal to the sustaining voltage V W Then the starting voltage V needs to be increased. Q Weight coefficient K QV Recalculate the new starting voltage V Q Recalculate.

[0067] Verify that the new shutdown voltage is greater than the 80V holding voltage V. W If so, then the shutdown voltage V needs to be reduced. G Weight coefficient K GV The new shutdown voltage V is recalculated. G Continue to verify the new shutdown voltage V G Is it less than zero? If so, the shutdown voltage V needs to be increased. G Weight coefficient K GV The new shutdown voltage V is recalculated. G Recalculate.

[0068] The elevator control system sends adjusted parameters to the control power supply when the weighting coefficient changes at a rate dK. QV and the rate of change of weight coefficients dK GV If the value is greater than or equal to the first set value, return to step S2 and continue running. This continues until the rate of change of the parameter's weight coefficient dK... QV and the rate of change of weight coefficients dK GV If the value is less than the first set value, the weight coefficient is considered to have converged, the parameter adjustment is complete, the debugging ends and a completion report is submitted. If the number of parameter adjustments exceeds the limit of the second set value, the parameter adjustment is considered to have failed, the debugging ends and a failure report is submitted, and the brake needs to be manually checked.

[0069] Example 2

[0070] This embodiment discloses an elevator, which includes a processor and a memory. The memory stores at least one instruction, which is loaded and executed by the processor to implement the noise reduction method in Embodiment 1.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0072] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0073] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for reducing noise in an elevator brake, characterized in that, Including the following steps: S1. Calculate the control parameters of the control power supply based on the basic parameters of the brake. The control parameters of the control power supply include: starting voltage, starting duration, closing voltage, and closing duration. S2. When the control power supply starts according to the control parameters, acquire the voltage, current and noise sensor information output by the control power supply; S3. Based on the voltage, current and noise sensor information of the control power supply output, calculate the maximum start-up noise value during the start-up duration and the maximum shutdown noise value during the shutdown duration. S4. Adjust the control parameters of the control power supply according to the maximum starting noise value and the maximum closing noise value during the closing duration, including: When the maximum startup noise value occurs in the first time period of the startup duration, the weighting coefficients of the startup voltage and startup duration are reduced, and the startup voltage and startup duration are updated according to the reduced weighting coefficients of the startup voltage and startup duration. When the maximum shutdown noise value occurs in the first time period of the shutdown duration, the weighting coefficient of the shutdown voltage is increased and the weighting coefficient of the shutdown duration is decreased. The shutdown voltage and shutdown duration are updated according to the increased weighting coefficients of the shutdown voltage and shutdown duration. When the maximum startup noise value occurs in the second time period of the startup duration, the weighting coefficient of the startup voltage and the weighting coefficient of the startup duration are increased, and the startup voltage and startup duration are updated according to the increased weighting coefficients of the startup voltage and the startup duration. When the maximum shutdown noise value occurs in the second time period of the shutdown duration, the weighting coefficient of the shutdown voltage is reduced and the weighting coefficient of the shutdown duration is increased. The shutdown voltage and shutdown duration are updated according to the reduced weighting coefficient of the shutdown voltage and the weighting coefficient of the shutdown duration. S5. If the rate of change of the weighting coefficient of the starting voltage, the weighting coefficient of the starting duration, the weighting coefficient of the shut-off voltage, and the weighting coefficient of the shut-off duration are all greater than or equal to the first set value, then return to step S2 and continue to execute in a loop. In this case, the control power supply starts according to the adjusted control parameters. S6. If the rate of change of the weighting coefficient of the starting voltage, the weighting coefficient of the starting duration, the weighting coefficient of the shut-off voltage, and the weighting coefficient of the shut-off duration are all less than the first set value, then a debugging completion signal is generated; if the number of times the control parameters are adjusted is greater than the second set value, then an adjustment failure signal is generated.

2. The noise reduction method according to claim 1, characterized in that, If the maximum starting noise value of the current round is less than the maximum starting noise value of the previous round, the weighting coefficient of the starting voltage will be increased according to the rate of change of the weighting coefficient of the previous round. If the maximum starting noise value of the current cycle is greater than the maximum starting noise value of the previous cycle, the weighting coefficient of the starting voltage will be reduced according to the rate of change of the weighting coefficient of the previous cycle.

3. The noise reduction method according to claim 1, characterized in that, If the maximum shutdown noise value of the current round is less than the maximum startup noise value of the previous round, the weighting coefficient of the shutdown voltage will be increased according to the rate of change of the weighting coefficient of the previous round. If the maximum shutdown noise value of the current cycle is greater than the maximum startup noise value of the previous cycle, the weighting coefficient of the shutdown voltage will be reduced according to the rate of change of the weighting coefficient of the previous cycle.

4. The noise reduction method according to claim 1, characterized in that, It also includes the following steps: The updated starting voltage is verified, and the weighting coefficient of the starting voltage is adjusted until the starting voltage meets the limit value. The updated shutdown voltage is verified, and the weighting coefficient of the shutdown voltage is adjusted until the shutdown voltage meets the limit value.

5. An elevator, characterized in that, The elevator includes a processor and a memory, the memory storing at least one instruction, which is loaded and executed by the processor to implement the noise reduction method as described in any one of claims 1 to 4.

Images