Magnetic drive elevator system and method

Abstract

The invention belongs to the field of elevator control systems, and relates to a magnetic drive elevator system. The system comprises a top electromagnetic system, a safety control system and a precision sensor which are respectively connected with a central control system, wherein the safety control system is connected with a bottom electromagnetic system; the central control system is used for cooperative control of electromagnetic methods and sizes of the safety control system, the top electromagnetic system, the bottom electromagnetic system and the lift car system; the car system carries a car bottom magnetic field and a car top magnetic field, and moves up and down under the synergistic effect of the top electromagnetic system and the bottom electromagnetic system; the precision sensor is used for feeding back the magnitude and direction of magnetic induction intensity; the top electromagnetic system and the magnetic field of the car roof of the car system act together to drive the car system to operate upwards or downwards. The central control system controls the bottom electromagnetic system through the safety control system, and the central control system and a magnetic field at the bottom of the lift car system jointly act to drive the lift car system to operate upwards or downwards. The invention further provides a magnetic drive elevator method.

Description

Technical Field

[0001] The present invention belongs to the field of elevator control systems and relates to a magnetic drive elevator system and method. Background Art

[0002] As an indispensable vertical transportation means in modern buildings, the performance and safety of elevators are particularly important. Elevators not only undertake the daily transportation tasks of personnel and goods, but also play a key role in enhancing the overall function and value of buildings. The efficiency, stability and safety of elevators directly affect the user experience and satisfaction. Therefore, the operating performance of traditional elevators and their reliability under high-frequency use have become core elements that must be given priority consideration in the design and operation processes.

[0003] Traditional traction elevator systems mainly rely on the mechanical transmission method of electric motors and steel ropes to achieve the lifting and lowering of the car. Although this design has been widely used in various buildings after long-term development and optimization, there are still some significant defects in actual operation. For example, traditional elevators often consume a large amount of electric energy during operation, resulting in an increase in the overall operating cost; the complex mechanical structure leads to a large required hoistway space and low utilization rate. In addition, due to the wear of mechanical components, the noise generated during operation is relatively large, which not only affects the quietness of the surrounding environment but also the riding experience of passengers. Summary of the Invention

[0004] In view of the above problems, the present invention provides a magnetic drive elevator system. The operation of the car system is realized through the mutual cooperation of electromagnetic force and the gravity of the car system, without secondary conversion, and has high energy utilization rate, which helps to save energy and reduce consumption.

[0005] The present invention also provides a magnetic drive elevator method.

[0006] The magnetic drive elevator system of the present invention is realized by adopting the following technical solutions:

[0007] A magnetic drive elevator system includes: a central control system, a safety control system, a top electromagnetic system, a bottom electromagnetic system, a car system and precision sensors. The central control system is respectively connected to the top electromagnetic system, the safety control system and the precision sensors, and the safety control system is connected to the bottom electromagnetic system; wherein:

[0008] The central control system is used for the coordinated control of the safety control system, the top electromagnetic system, the bottom electromagnetic system, the electromagnetic method and the size of the car system;

[0009] The top electromagnetic system is used to interact with the magnetic field on the car top of the car system to generate an attractive force or a repulsive force;

[0010] The bottom electromagnetic system is used to interact with the magnetic field on the car bottom of the car system to generate an attractive force or a repulsive force;

[0011] The car system is equipped with a magnetic field at the bottom and top of the car. Under the coordinated action of the top electromagnetic system and the bottom electromagnetic system, it moves up and down to complete transportation.

[0012] The precision sensor communicates with the central control system through a communication line, feeding back the magnitude and direction of the magnetic induction intensity.

[0013] The top electromagnetic system outputs a magnetic field under the signal drive of the central control system, and together with the magnetic field on the top of the car system of the car system, it generates either an attractive or repulsive force to drive the car system to move upward or downward.

[0014] The central control system outputs a signal to the bottom electromagnetism through the safety control system, driving the bottom electromagnetic system to output a magnetic field. Together with the magnetic field on the bottom of the car system of the car system, it generates either an attractive or repulsive force, and drives the upward or downward movement of the car system depending on the direction of the combined force of the top and bottom.

[0015] Preferably, the safety control system communicates with the central control system. Under normal operating conditions, the central control system regulates the bottom electromagnetic system through the safety control system; when a major fault occurs in the elevator or the central control system fails and power is cut off, the safety control system drives the bottom electromagnetic system to generate a magnetic field that repels the bottom of the car system, and safely stops under the action of the magnetic field force.

[0016] Furthermore, the safety control system independently controls the bottom electromagnetic system to output a magnetic field that repels the bottom of the car system through a communication line.

[0017] Preferably, the car system is composed of a magnetized top and bottom of the car; the magnetic pole directions at the bottom of the top of the car and the top of the bottom are independently distributed; the top and bottom of the car provide a magnetic field in one of the ways of permanent magnets and energized coils.

[0018] Preferably, the precision sensors are installed at different heights of the car system, and the precision sensors are used to detect the magnitude and direction of the magnetic induction intensity at different heights inside the car.

[0019] Preferably, the central control system identifies the information of people and objects inside the car through the change of the magnetic field between the top and bottom of the car.

[0020] The method of the magnetic drive elevator of the present invention is realized by adopting the following technical solutions:

[0021] A method of a magnetic drive elevator, comprising:

[0022] S1: The central control system receives an up or down elevator call input signal from outside the elevator.

[0023] S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, generating a mutual acting force with the magnetic field on the top of the car system. At the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line via the safety control system, generating a mutual acting force with the magnetic field on the bottom of the car system;

[0024] S3: The car system moves upward or downward under the interaction of the magnetic fields;

[0025] S4: The central control system identifies the destination floor of the car system and outputs signals to the top electromagnetic system and the bottom electromagnetic system. Under the coordinated control of the top electromagnetic system and the bottom electromagnetic system, the car system docks at the destination floor;

[0026] S5: The precision sensors detect the magnitude and direction of the magnetic induction intensity at different heights inside the car and feedback them to the central control system through the communication line;

[0027] S6: When a major failure occurs in the elevator or the power supply fails due to the failure of the central control system, the safety control system drives the bottom electromagnetic system to generate a magnetic field that repels the bottom of the car system through the communication line and safely docks under the action of the magnetic force.

[0028] Preferably, the magnetic drive elevator method further includes the steps:

[0029] The central control system identifies the personnel and object information inside the car through the change of the magnetic field between the top and the bottom of the car, and adjusts the control parameters of the top electromagnetic system, the bottom electromagnetic system and the car system.

[0030] Preferably, the magnetic drive elevator upward method includes:

[0031] S1: The central control system receives the upward elevator call input signal. At this time, ignoring external forces such as friction, the weight of the car system including passengers is G;

[0032] S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, generating a mutual attractive force F 顶 and a mutual repulsive force P 顶 , and at the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line via the safety control system, generating a repulsive force P 底 ;

[0033] S3: Under the control of the central control system, under the coordinated action of the top electromagnetic system and the bottom electromagnetic system, the car system has the following motion states:

[0034] Stage 1: F 顶 +P 底 >G, and P 底= G, at this time, the car system starts to accelerate upward;

[0035] Phase Two: F 顶 gradually decreases until it becomes 0, P 底 remains unchanged, at this time, the car system runs upward at a constant speed;

[0036] Phase Three: F 顶 After decreasing to 0, the top electromagnetic system starts to output a repulsive force P 顶 , P 底 remains unchanged, at this time, the car system decelerates upward;

[0037] Phase Four: P 顶 gradually decreases until it becomes 0, the car system completes deceleration, at this time P 底 = G, the car system safely stops at the destination floor.

[0038] Preferably, the method for the magnetic drive elevator to go downward includes:

[0039] S1: The central control system receives the downward elevator call input signal. At this time, ignoring external forces such as friction, the weight of the car system including passengers is G;

[0040] S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, generating an attractive force F 顶 and a repulsive force P 顶 with the magnetic field on the car top of the car system. At the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line via the safety control system, generating a repulsive force P 底 ;

[0041] S3: Under the control of the central control system, with the coordinated action of the top electromagnetic system and the bottom electromagnetic system, the car system has the following motion states:

[0042] Phase One: P 底 < G, and F 顶 = 0, at this time, the car system starts to accelerate downward;

[0043] Phase Two: P 底 gradually increases until P 底 = G, F 顶 remains unchanged, at this time, the car system runs downward at a constant speed;

[0044] Phase Three: P 底 continues to increase, P 底 > G, at this time, the car system decelerates downward;

[0045] Phase Four: P 底 gradually decreases until it becomes P 底= G, the car system completes deceleration, and at this time the car system safely docks at the destination floor.

[0046] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0047] (1) The car system is directly driven by electromagnetic force, with a light structure and simple control.

[0048] (2) It does not require devices such as wire ropes and motors required by traditional traction elevators, and has low noise.

[0049] (3) The utilization rate of the hoistway is high, and it can overcome the difficulty of low utilization rate of the hoistway space in the traditional traction elevator system.

[0050] (4) The operation of the car system is realized through the mutual cooperation of electromagnetic force and the gravity of the car system, without secondary conversion, with high energy utilization rate, which helps to save energy and reduce consumption.

[0051] (5) Under the control of the central control system, stepless speed regulation and position control of the elevator car can be realized. The central control system can identify the information of people and objects inside the car through the change of the magnetic field between the car top and the car bottom, so as to adjust the control parameters of the top electromagnetic system, the bottom electromagnetic system and the car system, better ensure the stable and safe operation of the magnetic drive elevator, and bring a better riding experience. It can also be used for applications such as detecting left-behind objects and detecting trapped people.

[0052] (6) When a major failure occurs in the elevator or the central control system fails and power is cut off, the safety control system drives the bottom electromagnetic system to generate a magnetic field that repels the bottom of the car system, and safely docks under the action of the magnetic field force, preventing the car system from losing weight and squatting to the bottom, which is safer than the existing magnetic drive elevators. Description of the Drawings

[0053] Figure 1 It is a block diagram of a magnetic drive elevator system in an embodiment of the present invention;

[0054] Figure 2 It is a flowchart of a magnetic drive elevator method in an embodiment of the present invention. Detailed Embodiments

[0055] The present invention will be further described below with reference to the drawings and embodiments, but the embodiments of the present invention are not limited thereto.

[0056] Compared with traditional elevators, this system has remarkable features such as high efficiency, safety, low noise, and low maintenance costs. The magnetic drive elevator utilizes the principle of magnetic force transmission, eliminating the direct mechanical contact between the wire rope and the motor, thereby significantly reducing wear and energy loss. This contactless drive method not only improves the overall efficiency of the system but also significantly reduces operating noise and vibration, enhancing the comfort of passengers. In addition, the design flexibility of the magnetic drive elevator enables it to adapt to various building structures and usage requirements, with stronger scalability and adaptability. The development of this new elevator system not only provides an innovative solution to address the deficiencies in existing elevator technologies but also points out a new path for the future development direction of elevators, with broad market prospects and application potential.

[0057] A magnetic drive elevator system is as Figure 1 shown, including: a central control system, a safety control system, a top electromagnetic system, a bottom electromagnetic system, a car system, and precision sensors. The central control system is respectively connected to the top electromagnetic system, the safety control system, and the precision sensors, and the safety control system is connected to the bottom electromagnetic system. Among them:

[0058] The central control system is used for the coordinated control of the safety control system, the top electromagnetic system, the bottom electromagnetic system, and the electromagnetic methods and magnitudes of the car system.

[0059] The safety control system communicates with the central control system. Under normal operating conditions, the central control system regulates the bottom electromagnetic system through the safety control system; when a major elevator fault occurs or the central control system fails and loses power, the safety control system drives the bottom electromagnetic system to generate a magnetic field that repels the bottom of the car system, and safely stops under the action of the magnetic field force to prevent the car system from losing weight and squatting down.

[0060] The top electromagnetic system is used to interact with the magnetic field on the top of the car system to generate an attractive or repulsive force.

[0061] The bottom electromagnetic system is used to interact with the magnetic field on the bottom of the car system to generate an attractive or repulsive force.

[0062] The car system is equipped with a magnetic field on the bottom and top of the car. Under the coordinated action of the top electromagnetic system and the bottom electromagnetic system, it moves up and down to complete transportation.

[0063] The car system is composed of a magnetized top and bottom of the car; the magnetic pole directions at the bottom of the top of the car and the top of the bottom of the car are independently distributed; the top and bottom of the car provide a magnetic field in one of the ways of permanent magnets or energized coils.

[0064] Precision sensors are installed at different heights of the car system. The precision sensors are used to detect the magnitude and direction of the magnetic induction intensity at different heights inside the car. The precision sensors communicate with the central control system through communication lines to feedback the magnitude and direction of the magnetic induction intensity.

[0065] The central control system is connected to the top electromagnetic system through communication lines. The top electromagnetic system outputs a magnetic field under the signal drive of the central control system, and together with the magnetic field on the top of the car system, generates either an attractive force or a repulsive force to drive the car system to move upward or downward.

[0066] The central control system is connected to the safety control system through communication lines, and the safety control system is connected to the bottom electromagnetic system through communication lines. The central control system outputs a signal to the bottom electromagnetic system through the safety control system to drive the bottom electromagnetic system to output a magnetic field, and together with the magnetic field on the bottom of the car system, generates either an attractive force or a repulsive force. Depending on the direction of the combined force of the top and bottom, it drives the car system to move upward or downward. Under the control of the central control system, stepless speed regulation and position control of the elevator car can be achieved.

[0067] The safety control system can independently control the bottom electromagnetic system to output a magnetic field that repels the bottom of the car system through communication lines.

[0068] In a preferred embodiment, the central control system can identify the information of people and objects inside the car through the change of the magnetic field between the top and bottom of the car. The implementation method includes:

[0069] A. Data cleaning and normalization processing. Data cleaning includes: ①. Removing noise: The elevator operating environment is complex, and the collected data may contain a large amount of noise, such as noise generated by motor operation, electromagnetic interference, etc. Use a filtering algorithm to remove the random noise in the data.

[0070] Handling missing values: Check whether there are missing values in the data. For a small number of missing values, methods such as linear interpolation and spline interpolation are used for supplementation; if there are many missing values, the data needs to be recollected or this part of the data needs to be discarded.

[0071] Data normalization: Since the data ranges collected by different sensors may be different, for the convenience of subsequent analysis and processing, the cleaned data is normalized. B. Construct a magnetic field change recognition model, and train and optimize the magnetic field change recognition model.

[0072] The magnetic field change recognition model comprehensively uses a Convolutional Neural Network (CNN) and a Long Short-Term Memory Network (LSTM). The CNN is responsible for extracting spatial features from magnetic field data, and the LSTM processes the time series information of the data. The model mainly includes: an input layer, a CNN feature extraction module, a data dimension adjustment layer, an LSTM sequence processing module, a fully connected layer, and an output layer. The input layer receives the preprocessed magnetic field data, the CNN module extracts spatial features, the data dimension adjustment layer adjusts the data dimension, the LSTM module captures the time dynamic information of the data, the fully connected layer integrates and classifies the features, and finally the output layer gives the recognition result.

[0073] Specifically:

[0074] Input layer: The data collected by the precision sensor over a period of time is arranged and combined after data cleaning and normalization to form a three-dimensional tensor as the input.

[0075] CNN feature extraction module: Use convolutional layers with multiple different-sized convolutional kernels to extract features from the input data to capture spatial features at different scales. A max-pooling layer is added after each convolutional layer to reduce the dimension of the feature map and reduce the computational amount.

[0076] Data dimension adjustment layer: Since the LSTM layer requires the input data to be a three-dimensional tensor, the four-dimensional tensor output by the CNN feature extraction module needs to be adjusted to three-dimensional. Use the Reshape layer to flatten the feature map in the channel dimension.

[0077] LSTM sequence processing module: Use the LSTM layer to process the data after dimension adjustment to capture the time series information of the magnetic field data.

[0078] The fully connected layer is used to perform further non-linear transformation and integration on the features output by the LSTM sequence processing module. To prevent overfitting, a Dropout layer is added after the fully connected layer.

[0079] Output layer: According to the specific requirements of the recognition task, the number of neurons and activation function of the output layer are different. If it is a classification task, such as identifying whether there is someone in the car and what kind of objects there are, use the softmax activation function, and the number of neurons is the number of categories; if it is a regression task, such as predicting the number of people in the car, use the linear activation function, and the number of neurons is 1.

[0080] C. Real-time recognition and feedback.

[0081] ①. Real-time data processing: The newly collected magnetic field data is processed in real time according to the above preprocessing steps, and then input into the trained and optimized model for real-time recognition.

[0082] ②. According to the recognition results, the central control system can adjust the control parameters of the top electromagnetic system, the bottom electromagnetic system and the car system in real time, better ensuring the stable and safe operation of the magnetic drive elevator and bringing a better riding experience. At the same time, new data is continuously collected to continuously train and optimize the model to improve the accuracy and reliability of recognition.

[0083] A magnetic drive elevator method, as Figure 2 shown, the steps include,

[0084] S1: The central control system receives the up / down elevator call input signal.

[0085] S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, generating an interaction force with the magnetic field on the top of the car system. At the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line via the safety control system, generating an interaction force with the magnetic field on the bottom of the car system.

[0086] S3: The car system moves up / down under the interaction of the magnetic fields.

[0087] S4: The central control system identifies the destination floor of the car system and outputs a signal to the top electromagnetic system and the bottom electromagnetic system. Under the coordinated control of the two systems, the car system stops at the destination floor.

[0088] S5: The precision sensor detects the magnitude and direction of the magnetic induction intensity at different heights inside the car and feeds it back to the central control system through the communication line.

[0089] S6: When a major elevator failure occurs or the central control system fails and loses power, the safety control system drives the bottom electromagnetic system to generate a magnetic field that repels the bottom of the car system through the communication line, and safely stops under the action of the magnetic field force to prevent the car system from losing weight and squatting to the bottom.

[0090] In a preferred embodiment, a magnetic drive elevator method further includes the step:

[0091] The central control system identifies the personnel and object information inside the car through the change of the magnetic field between the top and bottom of the car, thereby adjusting the control parameters of the top electromagnetic system, the bottom electromagnetic system and the car system, better ensuring the stable and safe operation of the elevator and bringing a better riding experience.

[0092] Embodiment 1:

[0093] S1: The central control system receives the up elevator call input signal. At this time, the weight of the car system (including passengers) is G (ignoring external forces such as friction).

[0094] S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, generating an attractive force F with the magnetic field on the top of the car system 顶 / repulsive force P 顶 , and at the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line via the safety control system, generating a repulsive force P with the magnetic field on the bottom of the car system 底 ;

[0095] S3: Under the control of the central control system, with the coordinated action of the top electromagnetic system and the bottom electromagnetic system, the car system undergoes the following motion states:

[0096] Phase 1: F 顶 +P 底 > G, and P 底 = G, at this time the car system starts to accelerate upward;

[0097] Phase 2: F 顶 gradually decreases until it becomes 0, P 底 remains unchanged, at this time the car system keeps moving upward at a constant speed;

[0098] Phase 3: After F 顶 decreases to 0, the top electromagnetic system starts to output a repulsive force P 顶 , P 底 remains unchanged, at this time the car system decelerates upward;

[0099] Phase 4: P 顶 gradually decreases until it becomes 0, the car system completes deceleration, at this time P 底 = G, and the car system safely docks at the destination floor.

[0100] Embodiment 2:

[0101] S1: The central control system receives the downward elevator call input signal, and at this time the weight of the car system (including passengers) is G (ignoring external forces such as friction);

[0102] S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, generating an attractive force F with the magnetic field on the top of the car system 顶 / repulsive force P 顶 , and at the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line via the safety control system, generating a repulsive force P with the magnetic field on the bottom of the car system 底 ;

[0103] S3: Under the control of the central control system, with the coordinated action of the top electromagnetic system and the bottom electromagnetic system, the car system undergoes the following motion states:

[0104] Phase 1: P 底<G, and F 顶 = 0, at this time the car system starts to accelerate downward;

[0105] Phase Two: P 底 gradually increases until P 底 = G, F 顶 remains unchanged, at this time the car system runs downward at a constant speed;

[0106] Phase Three: P 底 continues to increase, P 底 > G, at this time the car system decelerates downward;

[0107] Phase Four: P 底 gradually decreases until P 底 = G, the car system completes deceleration, and at this time the car system safely stops at the destination floor.

[0108] Embodiment 3:

[0109] The central control system is powered off, and the elevator enters an emergency state. At this time, the safety control system detects abnormal communication of the central control system and starts the emergency state. The safety control system drives the bottom electromagnetic system to output a magnetic field through the communication line, generating a repulsive force P with the magnetic field at the bottom of the car system 底 , under the action of P 底 , the car system gradually decelerates until it stops at the flat floor.

[0110] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A magnetic drive elevator system, characterized in that: include: The top electromagnetic system, safety control system and precision sensors connected to the central control system, and the safety control system connected to the bottom electromagnetic system; among them: The central control system is used for the electromagnetic method and coordinated control of the size of the safety control system, top electromagnetic system, bottom electromagnetic system and car system; The car system is equipped with a car bottom and car top magnetic field, and moves up and down under the coordinated action of the top electromagnetic system and the bottom electromagnetic system to complete the transportation; Precision sensors are used to feedback the magnitude and direction of magnetic induction intensity; The top electromagnetic system outputs a magnetic field driven by the signal of the central control system, and works together with the magnetic field of the car top of the car system to generate one of the attraction and repulsion forces, driving the car system to move upward or downward; The central control system outputs signals to the bottom electromagnetically through the safety control system, driving the bottom electromagnetic system to output a magnetic field, which works together with the magnetic field of the car system's bottom to generate one of the attraction and repulsion forces, and drives the car system to move upward or downward depending on the direction of the combined force of the top and bottom.

2. The magnetic drive elevator system according to claim 1, characterized in that: The safety control system communicates with the central control system. Under normal operating conditions, the central control system regulates the bottom electromagnetic system through the safety control system. When a major elevator failure occurs or the central control system fails and the power goes out, the safety control system drives the bottom electromagnetic system to generate a magnetic field that repels the bottom of the car system, and the elevator stops safely under the action of the magnetic field force.

3. The magnetic drive elevator system according to claim 1 or 2, characterized in that: The safety control system independently controls the bottom electromagnetic system through the communication line to output a magnetic field that repel each other with the bottom of the car system.

4. The magnetic drive elevator system according to claim 1, characterized in that: The car system consists of a car roof and a car bottom with magnetism; the magnetic pole directions of the bottom of the car roof and the top of the car bottom are independent of each other; the magnetic field of the car roof and the car bottom is provided by a permanent magnet or an energized coil.

5. The magnetic drive elevator system according to claim 1, characterized in that: Precision sensors are installed at different heights of the car system. The precision sensors are used to detect the size and direction of the magnetic induction intensity at different heights inside the car.

6. The magnetic drive elevator system according to claim 1, characterized in that: The central control system identifies the information of people and objects inside the car through the changes in the magnetic field between the top and bottom of the car.

7. A magnetic drive elevator method, characterized in that: include: S1: The central control system receives the up or down elevator signal input by the elevator call; S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, which generates an interaction force with the magnetic field on the top of the car system. At the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line through the safety control system, which generates an interaction force with the magnetic field on the bottom of the car system. S3: The car system moves upward or downward under the interaction of the magnetic field; S4: The central control system identifies the destination floor of the car system and outputs a signal to the top electromagnetic system and the bottom electromagnetic system. Under the coordinated control of the top electromagnetic system and the bottom electromagnetic system, the car system stops at the destination floor; S5: Precision sensors detect the magnitude and direction of magnetic induction at different heights inside the car and feed back to the central control system through communication lines; S6: When a major elevator failure occurs or the central control system fails and the power is cut off, the safety control system drives the bottom electromagnetic system through the communication line to generate a magnetic field that repel the bottom of the car system, and the elevator stops safely under the action of the magnetic field force.

8. The magnetic drive elevator method according to claim 7, characterized in that: The magnetic drive elevator method also includes the steps of: The central control system identifies the information of people and objects inside the car through the changes in the magnetic field between the top and bottom of the car, and adjusts the control parameters of the top electromagnetic system, bottom electromagnetic system and car system.

9. The magnetic drive elevator method according to claim 7 or 8, characterized in that: The upward method of magnetic drive elevator includes: S1: The central control system receives the up signal from the elevator call input. At this time, external forces such as friction are ignored, and the weight of the car system including passengers is G; S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, which generates a mutual attraction with the magnetic field on the top of the car system F 顶 and the mutual repulsion force P 顶 At the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line through the safety control system, generating a repulsive force P with the magnetic field of the car system bottom. 底 ; S3: Under the control of the central control system, the top electromagnetic system and the bottom electromagnetic system work together, and the car system moves in the following states: Phase 1: P 顶 +P 底 >G, and P 底 =G, at which point the car system begins to accelerate upward; Stage 2: F 顶 Gradually decrease until it reaches 0, P 底 Remain unchanged, at this time the car system keeps moving upward at a constant speed; Stage 3: F 顶 After decreasing to 0, the top electromagnetic system begins to output repulsive force P 顶 , P 底 Remain unchanged, at this time the car system runs upward with deceleration; Stage 4: P 顶 Gradually decreases until it reaches 0, and the car system completes deceleration. At this time, P 底 =G, the car system safely stops at the destination floor.

10. The magnetic drive elevator method according to claim 7 or 8, characterized in that: The magnetic drive elevator descending method includes: S1: The central control system receives the down-elevator signal input by the elevator call. At this time, external forces such as friction are ignored, and the weight of the car system including passengers is G; S2: The central control system drives the top electromagnetic system to output a magnetic field through the communication line, which generates a mutual attraction with the magnetic field on the top of the car system F 顶 and the mutual repulsion force P 顶 At the same time, the central control system drives the bottom electromagnetic system to output a magnetic field through the communication line through the safety control system, generating a repulsive force P with the magnetic field of the car system bottom. 底 ; S3: Under the control of the central control system, the top electromagnetic system and the bottom electromagnetic system work together, and the car system moves in the following states: Phase 1: P 底 <G, and F 顶 = 0, at this time the car system starts to accelerate downward; Phase 2: P 底 Gradually increase until P 底 =G,F 顶 Remain unchanged, at this time the car system keeps running downward at a constant speed; Phase 3: P 底 Continued increase, P 底 >G, at this time the car system decelerates downward; Stage 4: P 底 Gradually decrease until P 底 =G, the car system completes deceleration and the car system safely stops at the destination floor.

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