Elevator system

Abstract

The application relates to the technical field of energy management and storage, in particular to an elevator system, which comprises a battery energy storage unit, an energy comprehensive management unit, a driving control unit and a driving execution component; the energy comprehensive management unit is connected with the battery energy storage unit and the driving control unit through a DC bidirectional energy transmission link respectively, the driving control unit is connected with the driving execution component; the battery energy storage unit is used for providing electric energy; the energy comprehensive management unit is used for monitoring, managing and optimizing scheduling of energy; the driving control unit is used for controlling operation of the elevator system; and the driving execution component is used for driving operation of the elevator. The application solves the problems of low energy utilization efficiency, limited energy storage capacity and unreasonable electric energy distribution in a traditional elevator system, and improves the reliability, stability and energy saving property of the elevator system.

Description

Technical Field

[0001] This application relates to the field of energy management and storage technology, and in particular to an elevator system. Background Technology

[0002] With societal progress and accelerated urbanization, elevators, as an indispensable part of modern urban life, play a vital role in daily life and commerce. However, traditional elevators suffer from energy waste during operation. The kinetic energy generated by the elevator's drive components during operation is often dissipated in the form of braking resistors, failing to be effectively utilized.

[0003] To address the energy waste problem inherent in traditional elevators, existing technologies utilize energy feedback units to recover and reuse the kinetic energy of the elevator system. These units convert the kinetic energy generated during braking into electrical energy, which is then stored for later use by the elevator system.

[0004] While energy feedback units improve the energy efficiency of elevator systems to some extent, they still have some shortcomings. First, the energy storage capacity of energy feedback units is limited, insufficient to meet the long-term operational needs of the elevator system, easily leading to rapid energy consumption. Second, current technology cannot rationally allocate electrical energy according to peak and off-peak electricity demand in residential systems, resulting in low energy efficiency. Therefore, how to solve the problem of limited energy storage capacity in elevator systems and rationally allocate electrical energy according to peak and off-peak electricity demand remains a challenge. Summary of the Invention

[0005] This application provides an elevator system that solves the problems of low energy efficiency, limited energy storage capacity, and unreasonable power distribution in traditional elevator systems, thereby improving the reliability, stability, and energy efficiency of the elevator system. This application provides the following technical solution: In a first aspect, this application provides an elevator system, the system including a battery energy storage unit, an energy management unit, a drive control unit, and a drive execution component; the energy management unit is connected to the battery energy storage unit and the drive control unit respectively via a DC bidirectional energy transmission link, and the drive control unit is connected to the drive execution component; The battery energy storage unit is used to provide electrical energy; The integrated energy management unit is used for monitoring, managing, and optimizing energy scheduling; The drive control unit is used to control the operation of the elevator system; The drive actuator is used to drive the elevator.

[0006] In one specific implementation, the battery energy storage unit provides electrical energy for multiple purposes, including: providing the power required by elevator systems, the power required by vertical transportation equipment, and the power required as backup power for fire-fighting equipment or household appliances.

[0007] In one specific implementation scheme, the integrated energy management unit includes a photovoltaic power generation module, a grid energy control module, and a battery energy control module, and the output terminals of the photovoltaic power generation module, the grid energy control module, and the battery energy control module are all connected to the elevator control cabinet.

[0008] In one specific implementation, the power grid energy control module includes a first switch, a second switch, a third switch, and a power conversion device capable of bidirectionally converting AC and DC power. One end of the first switch is connected to the output end of the power grid, the other end of the first switch is connected to one end of the third switch, the other end of the third switch is connected to the input end of the power conversion device, and the output end of the power conversion device is connected to a DC load. One end of the second switch is connected to an AC load, and the other end of the second switch is connected to one end of both the first switch and the third switch.

[0009] In one specific implementation, the photovoltaic power generation module includes a DC / DC converter and an air switch. One end of the air switch is connected to the output terminal of the photovoltaic power generation module, and the other end of the air switch is connected to the input terminal of the DC / DC converter. The output terminal of the DC / DC converter is connected to the control cabinet of the elevator.

[0010] In one specific implementation, the battery energy control module includes a bidirectional DC / DC converter, the input of which is connected to the output of the battery, and the output of which is connected to the elevator control cabinet.

[0011] In one specific implementation scheme, the integrated energy management unit further includes a BMS battery management module, a PCS energy storage processing module, and an EMS energy control module. The BMS battery management module and the PCS energy storage processing module are both connected to the battery energy control module. The BMS battery management module is used to manage the charging and discharging process of the battery, and the PCS energy storage processing module is used to handle the charging and discharging process and power control of the energy storage system. The EMS energy control module is connected to the photovoltaic power generation module, the grid energy control module, and the battery energy control module, and is used to control the energy flow and optimized scheduling of the system.

[0012] In one specific implementation, the drive control unit includes a converter module and a control module; The control module includes a communication circuit, a floor data decoding circuit, and an operating logic control circuit. It is responsible for controlling the elevator's operating status, monitoring the signals of various sensors and devices, and controlling the elevator's operation according to the elevator's operating logic and instructions. The converter module is used to convert the DC power in the energy management system into AC power, which supplies the control module and the drive actuator for the normal operation of the elevator; at the same time, it is used to receive feedback power from the drive actuator, convert it into DC power, and feed it back to the energy management unit.

[0013] In one specific implementation, the converter module includes a soft braking resistor and a driver, and the converter module obtains DC power through a DC power supply; The input terminals of the soft braking resistor are connected to the positive and negative terminals of the DC input, respectively, and the output terminal of the soft braking resistor is connected to the holding brake power supply. The input terminals of the driver are respectively connected to the positive and negative terminals of the DC input, and the output terminal of the driver is connected to the drive execution component through phase output.

[0014] In summary, the beneficial effects of this application include at least the following: 1) During peak hours of mains power supply costs, the system can store electrical energy using battery storage units and recharge during off-peak hours at night, effectively reducing electricity costs. This intelligent energy management method not only reduces the operating costs of the elevator system but also helps alleviate the load pressure on the power grid, achieving the goals of energy conservation and emission reduction.

[0015] 2) By adopting green renewable energy and efficient energy management technologies, the elevator system of this application reduces its dependence on traditional fossil energy during operation, significantly reduces carbon emissions and environmental pollution, which is of great significance to the improvement of the urban environment and is in line with the modern society's pursuit of sustainable development and environmental protection.

[0016] 3) Through intelligent monitoring and coordinated scheduling by the integrated energy management unit, the elevator system achieves efficient utilization of multiple energy sources, including battery storage units, photovoltaic power generation, and other green and renewable energy sources. This integrated management optimizes energy utilization efficiency and minimizes energy waste.

[0017] This invention provides an elevator system comprising a battery energy storage unit, an energy management unit, a drive control unit, and drive actuators. The system uses a DC bidirectional energy transmission link to connect the components, achieving efficient utilization and flexible distribution of electrical energy. The battery energy storage unit not only provides the necessary power for the elevator system but can also power other vertical transportation equipment and emergency equipment. The energy management unit monitors and manages the use of various energy sources and optimizes power distribution, improving energy efficiency. The drive control unit communicates with the drive actuators via control signals to achieve precise control of the elevator system. Furthermore, the system utilizes multiple energy inputs, including photovoltaic power generation, grid energy, and green renewable energy, ensuring a stable power supply to the elevator system through power conversion and optimized scheduling. Through these features, this application solves the problems of low energy efficiency, limited energy storage capacity, and unreasonable power distribution in traditional elevator systems, improving the reliability, stability, and energy efficiency of the elevator system.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the elevator system in an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of the integrated energy management unit in the embodiments of this application.

[0021] Figure 3 This is a schematic diagram of the converter module in an embodiment of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] It should be noted that references to "an embodiment," "embodiment," "example embodiment," etc., in this specification refer to the described embodiment including specific features, structures, or characteristics; however, not every embodiment must include these specific features, structures, or characteristics. Furthermore, such expressions do not refer to the same embodiment. Moreover, when describing specific features, structures, or characteristics in conjunction with embodiments, whether or not explicitly described, it is indicated that incorporating such features, structures, or characteristics into other embodiments is within the knowledge of those skilled in the art.

[0024] Furthermore, certain terms are used in the specification and subsequent claims to refer to specific components or parts. Those skilled in the art will understand that manufacturers may use different names or terms to refer to the same component or part. This specification and subsequent claims do not distinguish components or parts by differences in name, but rather by differences in function. The terms "comprising" and "including" used throughout the specification and subsequent claims are open-ended and should be interpreted as "including but not limited to." Additionally, the term "connection" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connections made through other means.

[0025] Reference Figure 1 This is a schematic diagram of an elevator system provided in one embodiment of this application. The elevator system includes a battery energy storage unit, an energy management unit, a drive control unit, and a drive execution component. The energy management unit is connected to the battery energy storage unit and the drive control unit via a DC bidirectional energy transmission link. The drive control unit is communicatively connected to the drive execution component. The battery energy storage unit provides electrical energy to the elevator system, vertical transportation equipment, and other equipment. The energy management unit monitors, manages, and optimizes the scheduling of various energy sources. The drive control unit controls the operation of the elevator system. The drive execution component converts electrical energy into mechanical energy to drive the elevator.

[0026] In this embodiment, the battery energy storage unit is used to provide electrical energy for multiple purposes. First, it provides the necessary electrical energy for the elevator system to ensure the normal operation of the elevator. Second, it powers other vertical transportation equipment, such as elevators and escalators. Finally, it serves as a backup power source for fire-fighting equipment or household appliances to ensure the normal operation of fire-fighting equipment or to cope with emergencies such as power outages in case of emergency.

[0027] Optionally, sodium ions are selected as the battery carrier material in the battery energy storage unit of this application embodiment. Most of the chemical components used in sodium ion batteries are non-toxic and renewable, and have energy-saving and environmentally friendly effects. Other materials can also be used as battery carrier materials, and this application does not impose any restrictions on the battery carrier material.

[0028] Reference Figure 1 In addition to transmitting power to the battery energy storage unit, the integrated energy management unit also transmits power to the local power grid and green and environmentally friendly new energy sources, including solar and wind power.

[0029] In this embodiment, the connection between the drive control unit and the drive actuator is achieved through control signal lines or buses. These signal lines or buses transmit control signals, instructing the drive actuator to perform specific actions or operations. Control signals include start / stop commands, speed adjustment commands, and direction control commands, ensuring the elevator system operates according to predetermined operating logic and requirements. In practice, the drive control unit generates control signals and transmits them to the drive actuator via control lines or buses. Upon receiving the control signals, the drive actuator executes corresponding actions according to the instructions, such as starting the motor, adjusting the motor speed, or changing the motor direction, thereby achieving normal operation of the elevator system. This connection ensures precise control and adjustment of the drive actuator by the drive control unit to meet the operational requirements of the elevator system.

[0030] Reference Figure 2 This is a schematic diagram of the structure of an energy integrated management unit provided in one embodiment of this application. The energy integrated management unit receives electrical energy input from multiple power sources, including the power grid, batteries, and green renewable energy sources. It includes a photovoltaic power generation module, a power grid energy control module, and a battery energy control module. The output terminals of the photovoltaic power generation module, the power grid energy control module, and the battery energy control module are all connected to the elevator control cabinet and provide DC power to the elevator system. Using the above connection method, the photovoltaic power generation module, the power grid energy control module, and the battery energy control module share the same busbar, and the electrical energy output of the modules is connected to the same conductor in the same electrical system, making the power transmission between modules simpler and more efficient, while also reducing the complexity of the circuit board or electrical system.

[0031] In implementation, the integrated energy management unit also includes a BMS (Battery Management System) module, a PCS (Power Processing System) energy storage module, and an EMS (Energy Management System) module. Both the BMS and PCS modules are connected to the battery energy control module. The BMS manages the battery's charging and discharging process, while the PCS handles the charging and discharging process and power control of the energy storage system. The EMS module connects to the photovoltaic power generation module, the grid energy control module, and the battery energy control module, and is used to control the energy flow and optimize the scheduling of the entire system.

[0032] Reference Figure 2The power grid energy control module includes a first switch K1, a second switch K2, a third switch K3, and a power conversion device, which can bidirectionally convert alternating current (AC) and direct current (DC). One end of the first switch K1 is connected to the output of the power grid, and the other end of the first switch K1 is connected to one end of the third switch K3. The other end of the third switch K3 is connected to the input of the power conversion device, and the output of the power conversion device is connected to a DC load. One end of the second switch K2 is connected to the AC load, and the other end of the second switch K2 is connected to one end of both the first switch K1 and the third switch K3. Based on the above configuration, in implementation, if the power grid can output power, the first switch K1 and the second switch K2 are closed, and the third switch K3 is open. At this time, the power grid directly outputs the required power to the AC load for its normal operation. If the power grid is in a power outage state and cannot output power, the first switch K1 is opened, and the second switch K2 and the third switch K3 are closed. At this time, the power conversion device outputs the required power to the AC load. Furthermore, to ensure uninterrupted power supply during AC load switching, the switching process must be less than 10 milliseconds. This ensures the stability and safety of the elevator system, guaranteeing reliable power supply to passengers under all circumstances. In addition, a method for utilizing nighttime charging to address peak and off-peak electricity demand is proposed. Specifically, during peak electricity supply periods, the system can store energy using battery storage units and charge during off-peak hours at night, effectively reducing electricity costs. This intelligent energy management method not only reduces the operating costs of the elevator system but also helps alleviate grid load pressure, achieving energy conservation and emission reduction goals.

[0033] Reference Figure 2 The photovoltaic (PV) power generation module includes a DC / DC converter and an air switch. One end of the air switch is connected to the output of the PV power generation module, and the other end is connected to the input of the DC / DC converter. The output of the DC / DC converter is connected to the elevator control cabinet. The air switch is used to disconnect the circuit when necessary to protect the circuit. When it is necessary to stop or isolate the PV power generation module, disconnecting the air switch can quickly interrupt the circuit and avoid potential circuit failures and hazards. The DC / DC converter is used to regulate and convert the electrical energy output from the PV power generation module to adapt it to the operating voltage requirements of the elevator system, thereby meeting the power needs of the elevator system.

[0034] Optionally, while photovoltaic power generation is selected as a specific green renewable energy source in the embodiments of this application, wind power generation or other methods may also be selected. This application does not limit the specific type of green renewable energy.

[0035] Reference Figure 2The battery energy control module includes a bidirectional DC / DC converter. The input of the bidirectional DC / DC converter is connected to the output of the battery, and the output of the converter is connected to the elevator control cabinet. The bidirectional DC / DC converter enables the battery energy control module to achieve bidirectional power transmission. It can convert the DC power from the battery into the DC power required by the elevator system, and it can also convert the feedback power generated by the elevator system back into DC power and send it back to the battery for storage, thus realizing the recycling of electrical energy.

[0036] Reference Figure 1 In this application embodiment, the usage methods for multiple power sources include, but are not limited to, the following: When the mains power is at its peak, batteries or new energy sources are prioritized for power supply; when the mains power is at its trough, mains power is prioritized for charging the battery or directly powering the elevator. When batteries, mains power, and new energy sources (photovoltaic power generation, wind power, etc.) are all available, new energy sources are prioritized for charging the battery. Once the battery is fully charged, the new energy source directly powers the elevator. Alternatively, the battery can be charged first using mains power or new energy sources, and then the elevator can be powered using either mains power or new energy sources. When both mains power and new energy sources are available, new energy sources are still prioritized.

[0037] Reference Figure 1 The drive control unit includes a converter module and a control module. The control module includes communication circuits, floor data decoding circuits, and operating logic control circuits, etc., and is responsible for controlling the elevator's operating status, monitoring signals from various sensors and devices, and controlling the elevator's operation according to the elevator's operating logic and instructions. The control module receives electrical energy from the converter module to achieve comprehensive control and management of the elevator system. The converter module is responsible for converting the DC power in the energy management system into AC power, which supplies the control module and drive actuators for the normal operation of the elevator. At the same time, the converter module can also receive feedback electrical energy from the drive actuators and convert it into DC power for secondary utilization by the energy management unit.

[0038] Reference Figure 3This is a schematic diagram of a converter module provided in one embodiment of this application. The converter module includes a soft braking resistor (SBC) and a driver (Inverter). The output of the DC power supply provides DC power to the converter module. The soft braking resistor is used to implement the soft braking function of the elevator system. Soft braking decelerates the elevator by converting electrical energy into heat energy. The soft braking resistor achieves smooth braking of the elevator by regulating and consuming electrical energy, reducing energy waste. Specifically, the input terminals of the soft braking resistor are connected to the positive (DC+) and negative (DC-) terminals of the DC input to form a circuit, and the output terminal of the soft braking resistor is connected to the brake power supply. The driver is used to control the drive actuator, i.e., the motor device, and is responsible for converting DC power into AC power to drive the elevator motor. Specifically, the input terminals of the driver are connected to the positive and negative terminals of the DC input, and the output terminals of the driver have three phase outputs U, V, and W, which are used to connect to the three-phase coils of the elevator motor.

[0039] In summary, this application provides an elevator system comprising a battery energy storage unit, an energy management unit, a drive control unit, and drive actuators. The system uses a DC bidirectional energy transmission link to connect the components, achieving efficient utilization and flexible allocation of electrical energy. The battery energy storage unit not only provides the necessary electrical energy for the elevator system but can also power other vertical transportation equipment and emergency equipment. The energy management unit monitors and manages the use of various energy sources and optimizes energy allocation, improving energy efficiency. The drive control unit communicates with the drive actuators via control signals to achieve precise control of the elevator system. Furthermore, the system utilizes multiple energy inputs, including photovoltaic power generation, grid energy, and green renewable energy, ensuring a stable power supply to the elevator system through energy conversion and optimized scheduling. Through these features, this application solves the problems of low energy efficiency, limited energy storage capacity, and unreasonable energy allocation in traditional elevator systems, improving the reliability, stability, and energy efficiency of the elevator system.

[0040] In another feasible embodiment, a hybrid optimization model based on energy supply is introduced to effectively manage and optimize the three power sources. The model considers factors such as fluctuations in grid electricity prices, battery charging and discharging efficiency, and uncertainties in renewable energy generation, aiming to minimize the total energy consumption and cost of the elevator system. Mixed-integer linear programming (MILP) is used to model and solve this optimization problem, and its mathematical expression is roughly as follows:

[0041]

[0042]

[0043]

[0044]

[0045]

[0046] in, It is a moment Electricity purchased from the municipal power grid, It is a moment Electrical energy used for battery charging It is a moment The electrical energy released by the battery It is a moment Electrical energy obtained from renewable energy generation. It is a moment The load requirements of the elevator system It is a moment The price of electricity in the city, It is a moment The cost of battery charging, It is a moment The cost of battery discharge, It is a moment The cost of new energy power generation, It is a moment The maximum amount of electrical energy purchased from the municipal power grid. It is a moment The maximum electrical energy used for battery charging. It is a moment The maximum electrical energy released by the battery. It is a moment The maximum electrical energy obtained from renewable energy generation. This refers to the number of time periods considered.

[0047] By solving this optimization problem, an optimal power supply strategy is obtained to minimize the total cost of the elevator system and effectively utilize grid electricity, batteries, and renewable energy generation, thereby improving the system's energy efficiency and economy. The optimal power supply strategy refers to finding the most economical and efficient way to meet the elevator system's energy needs through a mathematical model, considering factors such as grid electricity prices, battery charging and discharging efficiency, and the uncertainty of renewable energy generation. This strategy tells the system how much electricity to purchase from the grid, how much to charge or discharge the batteries, and how much to obtain from renewable energy generation at each time period, to minimize the system's total cost. By solving this optimization problem, an economically and energy-efficient power supply strategy is obtained, thus achieving the sustainable operation of the elevator system.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0049] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An elevator system, characterized in that, The system includes a battery energy storage unit, an energy management unit, a drive control unit, and drive execution components; The energy management unit is connected to the battery energy storage unit and the drive control unit respectively via a DC bidirectional energy transmission link, and the drive control unit is connected to the drive execution component; The battery energy storage unit is used to provide electrical energy; The integrated energy management unit is used to monitor, manage, and optimize energy scheduling; the integrated energy management unit includes a photovoltaic power generation module, a power grid energy control module, and a battery energy control module, and the output terminals of the photovoltaic power generation module, the power grid energy control module, and the battery energy control module are all connected to the elevator control cabinet; The power grid energy control module includes a first switch, a second switch, a third switch, and a power conversion device capable of bidirectionally converting AC and DC power. One end of the first switch is connected to the output end of the power grid, the other end of the first switch is connected to one end of the third switch, the other end of the third switch is connected to the input end of the power conversion device, and the output end of the power conversion device is connected to a DC load. One end of the second switch is connected to an AC load, and the other end of the second switch is connected to one end of both the first switch and the third switch. The integrated energy management unit is also used to establish a hybrid optimization model based on energy supply, and to solve the hybrid optimization model using mixed integer linear programming to obtain a power supply strategy; The hybrid optimization model aims to minimize the total energy consumption and cost of the elevator system, and uses the following constraints as constraints: power supply and demand balance, upper limit of grid power purchase, upper limit of battery charging, upper limit of battery discharging, and upper limit of energy acquisition from new energy sources. The power supply strategy includes the power purchased from grid power in each time period, the power used for battery charging, the power released from the battery, and the power acquired from new energy sources. The objective function of the hybrid optimization model is: ； The constraints of the hybrid optimization model include: ； ； ； ； ； in, Indicates time Electricity purchased from the municipal power grid, Indicates time Electrical energy used for battery charging Indicates time The electrical energy released by the battery Indicates time Electrical energy obtained from renewable energy generation Indicates time The load requirements of the elevator system Indicates time The price of electricity from the grid, Indicates time The cost of battery charging, Indicates time The cost of battery discharge, Indicates time The cost of new energy power generation, Indicates time The maximum amount of electrical energy purchased from the municipal power grid. Indicates time The maximum electrical energy used for battery charging. Indicates time The maximum electrical energy released by the battery. Indicates time The maximum electrical energy obtained from renewable energy generation. Indicates the number of time periods considered; The drive control unit is used to control the operation of the elevator system; The drive actuator is used to drive the elevator.

2. The elevator system according to claim 1, characterized in that, The battery energy storage unit provides electrical energy for various purposes, including: providing the power required by elevator systems, the power required by vertical transportation equipment, and the power required as backup power for fire-fighting equipment or household appliances.

3. The elevator system according to claim 1, characterized in that, The photovoltaic power generation module includes a DC / DC converter and an air switch. One end of the air switch is connected to the output terminal of the photovoltaic power generation module, and the other end of the air switch is connected to the input terminal of the DC / DC converter. The output terminal of the DC / DC converter is connected to the control cabinet of the elevator.

4. The elevator system according to claim 1, characterized in that, The battery energy control module includes a bidirectional DC / DC converter, the input of which is connected to the output of the battery, and the output of which is connected to the elevator control cabinet.

5. The elevator system according to claim 1, characterized in that, The integrated energy management unit further includes a BMS battery management module, a PCS energy storage processing module, and an EMS energy control module. The BMS battery management module and the PCS energy storage processing module are both connected to the battery energy control module. The BMS battery management module is used to manage the charging and discharging process of the battery, and the PCS energy storage processing module is used to handle the charging and discharging process and power control of the energy storage system. The EMS energy control module is connected to the photovoltaic power generation module, the grid energy control module, and the battery energy control module, and is used to control the energy flow and optimized scheduling of the system.

6. The elevator system according to claim 1, characterized in that, The drive control unit includes a converter module and a control module; The control module includes a communication circuit, a floor data decoding circuit, and an operating logic control circuit. It is responsible for controlling the elevator's operating status, monitoring the signals of various sensors and devices, and controlling the elevator's operation according to the elevator's operating logic and instructions. The converter module is used to convert the DC power in the energy management system into AC power, which supplies the control module and the drive actuator for the normal operation of the elevator; at the same time, it is used to receive feedback power from the drive actuator, convert it into DC power, and feed it back to the energy management unit.

7. The elevator system according to claim 6, characterized in that, The converter module includes a soft braking resistor and a driver, and the converter module obtains DC power through a DC power supply; The input terminals of the soft braking resistor are connected to the positive and negative terminals of the DC input, respectively, and the output terminal of the soft braking resistor is connected to the holding brake power supply. The input terminals of the driver are respectively connected to the positive and negative terminals of the DC input, and the output terminal of the driver is connected to the drive execution component through phase output.

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