Operation method of multi-group motor driving structure

Abstract

The invention discloses an operation method of a multi-group motor driving structure, which comprises the following steps: S1, deploying and connecting components, coaxially connecting a plurality of groups of titanium alloy flywheels with a generator through a mechanical transmission device, and connecting a flywheel group and a contour structure in series by using a carbon fiber-high molecular polyethylene composite rope, a plurality of motors are connected in parallel through nylon ropes and standardized couplings to form a linkage system. The system has the advantages of high efficiency, energy conservation, dynamic stability and wide-range adaptability, and solves the problem that in a traditional power generation and motor driving system, a coupler serves as a core component for energy transmission, and the efficiency and stability of the coupler directly affect the performance of the whole system.

Description

Technical Field

[0001] The present invention relates to the technical field of power group operation processes of generators, and in particular to an operation method of a multi-group motor drive structure. Background Art

[0002] In traditional power generation and motor drive systems, couplings are core components of energy transmission, and their efficiency and stability directly affect the overall system performance. However, existing technologies have the following significant drawbacks:

[0003] Low energy utilization: Traditional rigid couplings suffer from high energy loss due to mechanical friction and vibration, and the power generation efficiency of single-chip motors is generally less than 85%, making it difficult to meet the needs of high-energy consumption scenarios.

[0004] Under load fluctuations or frequent start-stop conditions, traditional couplings lack inertial energy storage and dynamic compensation mechanisms, which can easily cause the transmission system to stall or overload, resulting in increased equipment failure rates.

[0005] Traditional structures are prone to material aging and fatigue fracture in high temperature, high humidity or corrosive environments, with short maintenance cycles and significantly increased operation and maintenance costs.

[0006] In this context, a motor-coupling combined operation method that is both highly efficient and energy-saving, dynamically stable, and has wide-range adaptability is needed to break through the bottleneck of traditional technology and meet the urgent needs of new energy vehicles, smart grids, heavy machinery, and other fields for high-reliability energy transmission systems. Summary of the Invention

[0007] The purpose of the present invention is to provide an operating method for a multi-motor drive structure, which has the advantages of high efficiency and energy saving, dynamic stability and wide-range adaptability, and solves the problem in traditional power generation and motor drive systems that the efficiency and stability of the coupling, as the core component of energy transmission, directly affect the overall system performance.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a method for operating a multi-motor drive structure, comprising the following steps:

[0009] S1. Component deployment and connection: Multiple sets of titanium alloy flywheels are coaxially connected to the generator through mechanical transmission devices. Carbon fiber-polymer polyethylene composite ropes are used to connect the flywheel groups and the contour structure in series. Multiple motors are connected in parallel through nylon ropes and standardized couplings to form a linkage system.

[0010] S2. Kinetic energy generation and transmission: An external power supply or battery is used to briefly drive the flywheel assembly to a reference speed, activating inertial energy storage. The flywheel assembly drives the generator to operate, outputting electrical energy to the bidirectional inverter. The flywheel assembly kinetic energy is transmitted to the first set of contour structures via a composite rope. The transmission efficiency is displayed in real time on the digital twin platform. Part of the kinetic energy is continuously generated by the generator and stored in a supercapacitor or fed into the grid. Part of the kinetic energy is regulated by the accelerator and transmitted to the motor assembly to maintain closed-loop operation.

[0011] S3, dynamic control and stable operation, uses fiber optic pressure sensors and Hall current sensors to monitor the torque, current, and temperature data of the transmission path in real time. The shunt ratio and accelerator speed are automatically adjusted according to load changes. A Kalman filter is linked to the speed control motor to suppress the fluctuation of the flywheel group to within ±0.8%. The first group of contour structures transfers the remaining kinetic energy to the next group via a composite rope. The end monitoring ring verifies the energy loss rate. Phase change materials absorb waste heat from the equipment, and the thermoelectric generator converts heat energy into auxiliary power.

[0012] S4, stability maintenance and fault tolerance: The magnetic field strength is adjusted according to the vibration spectrum. The motor housing is covered with a honeycomb metamaterial layer to absorb medium and high-frequency noise in a targeted manner. A faulty flywheel assembly can be replaced through a quick-release flange without any downtime.

[0013] S5, shutdown and maintenance, cut off the external drive, the flywheel group kinetic energy is stored in the supercapacitor, the speed is slowly reduced to below 200rpm, and the digital twin platform generates a component health report. When cracks are detected on the surface of the composite rope, the microcapsules release repair agents to fill the gaps. The sensor accuracy is calibrated every 5000 hours, and the PID algorithm parameter library is updated.

[0014] As a preferred operating method of a multi-group motor drive structure of the present invention, the carbon fiber-polymer polyethylene composite rope is composed of a carbon fiber core layer and a polyethylene outer layer woven together, the core layer diameter is 4-6 mm, the outer layer braiding angle is 45°±5°, the tensile strength is ≥800 MPa, and the surface of the composite rope is coated with a self-healing polyurethane coating containing microcapsules, the microcapsule diameter is 50-200 μm, and the rupture threshold pressure is 5-10 MPa.

[0015] As a preferred operating method of a multi-group motor drive structure of the present invention, the bidirectional inverter is a silicon carbide-based bidirectional AC / DC module with a rated power covering 10kW-1MW, a conversion efficiency ≥98%, and an integrated on-load voltage regulation function. It supports an adjustable voltage output range of 200V-1000V and has the ability to seamlessly switch between on-grid and off-grid.

[0016] As a preferred operating method of a multi-group motor drive structure of the present invention, the optical fiber pressure sensor adopts a Bragg grating array, which is arranged at 50 cm intervals along the axial direction of the composite rope, with a wavelength resolution of 0.1pm and a monitoring frequency of 1kHz, and synchronizes data in real time with the digital twin platform through a fiber grating demodulator.

[0017] As a preferred operating method of a multi-group motor drive structure of the present invention, the titanium alloy flywheel group is forged with TC4 titanium alloy, with a diameter of 1.2-1.5m, a thickness of 0.3-0.5m, an inertia density ≥200kJ / kg, and the flywheel surface is plasma nitrided, with a surface hardness ≥800HV, and operates in a sealed cavity with a vacuum degree ≤10-3Pa.

[0018] As a preferred operating method of a multi-group motor drive structure of the present invention, it also includes a vacuum insulation tube, which is a double-layer stainless steel structure, the inner layer is a corrugated tube, the outer layer is a rigid sheath, the interlayer is evacuated to ≤10-2Pa, and filled with a nano aerogel insulation layer, the thermal conductivity coefficient is ≤0.02W / (m·K), and the two ends of the tube body are airtightly connected to the flywheel group and the contour structure through flanges.

[0019] As a preferred operating method of a multi-motor drive structure of the present invention, the digital twin platform has a built-in three-dimensional physics engine, which maps the flywheel stress field, temperature field and composite rope deformation data in real time, and integrates a life prediction model. It calculates the remaining life of components based on the Weibull distribution algorithm with an error of ≤5%, and supports blockchain encrypted storage of operation logs.

[0020] As a preferred operating method of a multi-group motor drive structure of the present invention, the phase change material is a paraffin-expanded graphite composite phase change material with a phase change temperature of 65±5°C and a latent heat of ≥180kJ / kg. It is encapsulated in an aluminum alloy honeycomb structure with a filling rate of ≥85%, and the thermoelectric generator is a bismuth telluride-based module with a thermoelectric conversion efficiency of ≥8%.

[0021] As a preferred operating method of a multi-motor drive structure of the present invention, the number of turns of the excitation coil of the magnetorheological damper is 500-800 turns, the current control range is 0-5A, the response time is ≤10ms, and the feedback control relationship between the damping force and the vibration acceleration satisfies F=K·a 2 , where K is 0.5-1.2N·s 2 / m 2 , the vibration frequency suppression range is 50-500Hz.

[0022] As a preferred operating method of a multi-group motor drive structure of the present invention, the microcapsule repair agent is a two-component epoxy resin, component A contains glycidyl ether epoxy resin, component B contains polyamide curing agent, the capsule wall thickness is 5-10 μm, the curing time after the repair agent is released is 30-60 minutes, and the tensile strength recovery rate after repair is ≥90%.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This invention combines carbon fiber-polymer polyethylene composite rope with vacuum-insulated tubing to reduce kinetic energy transmission losses, achieving over three times the energy efficiency of traditional couplings. A bidirectional inverter supports reverse injection of electrical energy into the flywheel drive motor. Combined with supercapacitor energy storage and flywheel inertial energy storage, the system achieves a 93% energy utilization rate, completing a closed-loop "power generation-energy storage-drive" system and reducing reliance on external energy sources. Phase change materials and bismuth telluride thermoelectric modules convert waste heat from the equipment into auxiliary power, improving overall system efficiency by 8-10%.

[0025] 2. The present invention uses a Kalman filter to link the speed control motor, suppressing the speed fluctuation of the flywheel group to within ±0.8%, and the load mutation recovery time is ≤0.8s, which can adapt to extreme working conditions with grid fluctuations of ±20%. The magnetorheological damper and the honeycomb metamaterial shell work together to control the equipment noise below 58dB(A) and reduce the vibration amplitude by 70%. The automatic switching of the dual transmission channels and the modular quick-release design ensure the continuous operation reliability of the system. Based on the three-dimensional physics engine and Weibull life prediction model, key parameters such as flywheel stress and composite rope deformation are monitored in real time, and fault warnings are issued in advance, reducing maintenance costs. Microcapsule coating and plasma nitriding flywheels greatly extend the life of components. The PID algorithm and optical fiber sensor dynamically adjust the diverter ratio and accelerator speed to adapt to the load variation range and avoid the risk of overload or underload. The vacuum insulation tube and nano-aerogel layer ensure that the system operates stably under extreme temperatures, provides AC / DC dual-power supply, and seamless switching between on-grid and off-grid. It is suitable for diversified scenarios such as new energy vehicles, smart microgrids, and industrial heavy-duty machinery. The titanium alloy flywheel and stainless steel vacuum tube extend their service life in humid and corrosive environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a flow chart of the operating method of the present invention. DETAILED DESCRIPTION

[0027] See also Figure 1 , a method for operating a multi-motor drive structure, comprising the following steps:

[0028] S1. Component deployment and connection: Multiple sets of titanium alloy flywheels are coaxially connected to the generator through mechanical transmission devices. Carbon fiber-polymer polyethylene composite ropes are used to connect the flywheel groups and the contour structure in series. Multiple motors are connected in parallel through nylon ropes and standardized couplings to form a linkage system.

[0029] S2. Kinetic energy generation and transmission: An external power supply or battery is used to briefly drive the flywheel assembly to a reference speed, activating inertial energy storage. The flywheel assembly drives the generator to operate, outputting electrical energy to the bidirectional inverter. The flywheel assembly kinetic energy is transmitted to the first set of contour structures via a composite rope. The transmission efficiency is displayed in real time on the digital twin platform. Part of the kinetic energy is continuously generated by the generator and stored in a supercapacitor or fed into the grid. Part of the kinetic energy is regulated by the accelerator and transmitted to the motor assembly to maintain closed-loop operation.

[0030] S3, dynamic control and stable operation, uses fiber optic pressure sensors and Hall current sensors to monitor the torque, current, and temperature data of the transmission path in real time. The shunt ratio and accelerator speed are automatically adjusted according to load changes. A Kalman filter is linked to the speed control motor to suppress the fluctuation of the flywheel group to within ±0.8%. The first group of contour structures transfers the remaining kinetic energy to the next group via a composite rope. The end monitoring ring verifies the energy loss rate. Phase change materials absorb waste heat from the equipment, and the thermoelectric generator converts heat energy into auxiliary power.

[0031] S4, stability maintenance and fault tolerance: The magnetic field strength is adjusted according to the vibration spectrum. The motor housing is covered with a honeycomb metamaterial layer to absorb medium and high-frequency noise in a targeted manner. A faulty flywheel assembly can be replaced through a quick-release flange without any downtime.

[0032] S5, shutdown and maintenance, cut off the external drive, the flywheel group kinetic energy is stored in the supercapacitor, the speed is slowly reduced to below 200rpm, and the digital twin platform generates a component health report. When cracks are detected on the surface of the composite rope, the microcapsules release repair agents to fill the gaps. The sensor accuracy is calibrated every 5000 hours, and the PID algorithm parameter library is updated.

[0033] The carbon fiber-polymer polyethylene composite rope is composed of a carbon fiber core layer and a polyethylene outer layer. The core layer diameter is 4-6mm, the outer layer braiding angle is 45°±5°, the tensile strength is ≥800MPa, and the surface of the composite rope is coated with a self-healing polyurethane coating containing microcapsules. The diameter of the microcapsules is 50-200μm, and the rupture threshold pressure is 5-10MPa.

[0034] The bidirectional inverter is a silicon carbide-based bidirectional AC / DC module with a rated power range of 10kW-1MW, a conversion efficiency of ≥98%, and an integrated on-load voltage regulation function. It supports an adjustable voltage output range of 200V-1000V and has the ability to seamlessly switch between on-grid and off-grid.

[0035] The fiber optic pressure sensor uses a Bragg grating array, which is arranged at 50 cm intervals along the axial direction of the composite rope. It has a wavelength resolution of 0.1 pm and a monitoring frequency of 1 kHz. The data is synchronized in real time with the digital twin platform through a fiber optic Bragg grating demodulator.

[0036] The titanium alloy flywheel assembly is forged from TC4 titanium alloy with a diameter of 1.2-1.5m, a thickness of 0.3-0.5m, an inertia density ≥200kJ / kg, and the flywheel surface is plasma nitrided with a surface hardness ≥800HV. It runs in a sealed cavity with a vacuum degree ≤10-3Pa.

[0037] It also includes a vacuum insulation pipe, which is a double-layer stainless steel structure with a corrugated tube as the inner layer and a rigid sheath as the outer layer. The interlayer is evacuated to ≤10-2Pa and filled with a nano-aerogel insulation layer with a thermal conductivity of ≤0.02W / (m·K). Both ends of the pipe are airtightly connected to the flywheel assembly and the contour structure through flanges.

[0038] The digital twin platform has a built-in three-dimensional physics engine that maps the flywheel stress field, temperature field and composite rope deformation data in real time, and integrates a life prediction model to calculate the remaining life of components based on the Weibull distribution algorithm with an error of ≤5%. It also supports blockchain encrypted storage of operation logs.

[0039] The phase change material is a paraffin-expanded graphite composite phase changer with a phase change temperature of 65±5°C and a latent heat of ≥180kJ / kg. It is encapsulated in an aluminum alloy honeycomb structure with a filling rate of ≥85%. The thermoelectric generator is a bismuth telluride-based module with a thermoelectric conversion efficiency of ≥8%.

[0040] The number of turns of the magnetorheological damper's excitation coil is 500-800 turns, the current control range is 0-5A, the response time is ≤10ms, and the feedback control relationship between the damping force and the vibration acceleration satisfies F=K·a 2 , where K is 0.5-1.2N·s 2 / m 2 , the vibration frequency suppression range is 50-500Hz.

[0041] The microcapsule repair agent is a two-component epoxy resin, component A contains glycidyl ether epoxy resin, and component B contains polyamide curing agent. The capsule wall thickness is 5-10 μm, the curing time after the repair agent is released is 30-60 minutes, and the tensile strength recovery rate after repair is ≥90%.

[0042] The combination of carbon fiber-polymer polyethylene composite rope and vacuum-insulated tubing reduces kinetic energy transmission losses, resulting in energy efficiency improvements of more than three times that of traditional couplings. A bidirectional inverter supports reverse injection of electrical energy into the flywheel drive motor. Combined with supercapacitor energy storage and flywheel inertial energy storage, the system achieves a 93% energy utilization rate, completing a closed-loop "power generation-energy storage-drive" system and reducing reliance on external energy sources. Phase change materials and bismuth telluride thermoelectric modules convert waste heat from the equipment into auxiliary power, improving overall system efficiency by 8-10%.

[0043] By leveraging a Kalman filter to control the speed of the motor, flywheel assembly speed fluctuations are suppressed to within ±0.8%, with a load recovery time of ≤0.8s, making it suitable for extreme operating conditions with grid fluctuations of ±20%. Magnetorheological dampers and a honeycomb metamaterial housing work together to keep equipment noise below 58dB(A) and reduce vibration amplitude by 70%. Automatic switching of dual transmission channels and a modular quick-release design ensure continuous system operation and reliability. A 3D physics engine and a Weibull life prediction model monitor key parameters such as flywheel stress and composite rope deformation in real time, providing early warning of failures and reducing maintenance costs. Microcapsule coating and plasma nitriding of the flywheel significantly extend component life. A PID algorithm and fiber optic sensors dynamically adjust the diverter ratio and accelerator speed to adapt to varying loads, minimizing overload and underload risks. Vacuum insulation and a nano-aerogel layer ensure stable operation in extreme temperatures. Dual AC / DC power supply and seamless on-grid / off-grid switching make the system suitable for diverse applications such as new energy vehicles, smart microgrids, and heavy-duty industrial machinery. The titanium alloy flywheel and stainless steel vacuum tubes extend their life in humid and corrosive environments.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for operating a multi-motor drive structure, characterized in that: The following steps are involved: S1. Component deployment and connection: Multiple sets of titanium alloy flywheels are coaxially connected to the generator through mechanical transmission devices. Carbon fiber-polymer polyethylene composite ropes are used to connect the flywheel groups and the contour structure in series. Multiple motors are connected in parallel through nylon ropes and standardized couplings to form a linkage system. S2. Kinetic energy generation and transmission: An external power supply or battery is used to briefly drive the flywheel assembly to a reference speed, activating inertial energy storage. The flywheel assembly drives the generator to operate, outputting electrical energy to the bidirectional inverter. The flywheel assembly kinetic energy is transmitted to the first set of contour structures via a composite rope. The transmission efficiency is displayed in real time on the digital twin platform. Part of the kinetic energy is continuously generated by the generator and stored in a supercapacitor or fed into the grid. Part of the kinetic energy is regulated by the accelerator and transmitted to the motor assembly to maintain closed-loop operation. S3, dynamic control and stable operation, uses fiber optic pressure sensors and Hall current sensors to monitor the torque, current, and temperature data of the transmission path in real time. The shunt ratio and accelerator speed are automatically adjusted according to load changes. A Kalman filter is linked to the speed control motor to suppress the fluctuation of the flywheel group to within ±0.8%. The first group of contour structures transfers the remaining kinetic energy to the next group via a composite rope. The end monitoring ring verifies the energy loss rate. Phase change materials absorb waste heat from the equipment, and the thermoelectric generator converts heat energy into auxiliary power. S4, stability maintenance and fault tolerance: The magnetic field strength is adjusted according to the vibration spectrum. The motor housing is covered with a honeycomb metamaterial layer to absorb medium and high-frequency noise in a targeted manner. A faulty flywheel assembly can be replaced through a quick-release flange without any downtime. S5, shutdown and maintenance, cut off the external drive, the flywheel group kinetic energy is stored in the supercapacitor, the speed is slowly reduced to below 200rpm, and the digital twin platform generates a component health report. When cracks are detected on the surface of the composite rope, the microcapsules release repair agents to fill the gaps. The sensor accuracy is calibrated every 5000 hours, and the PID algorithm parameter library is updated.

2. The method for operating a multi-motor drive structure according to claim 1, characterized in that: The carbon fiber-polymer polyethylene composite rope is composed of a carbon fiber core layer and a polyethylene outer layer. The core layer has a diameter of 4-6 mm, the outer layer braiding angle is 45°±5°, the tensile strength is ≥800 MPa, and the surface of the composite rope is coated with a self-healing polyurethane coating containing microcapsules. The microcapsules have a diameter of 50-200 μm and a rupture threshold pressure of 5-10 MPa.

3. The method for operating a multi-motor drive structure according to claim 2, characterized in that: The bidirectional inverter is a silicon carbide-based bidirectional AC / DC module with a rated power range of 10kW-1MW, a conversion efficiency of ≥98%, and an integrated on-load voltage regulation function. It supports an adjustable voltage output range of 200V-1000V and has the ability to seamlessly switch between on-grid and off-grid.

4. The method for operating a multi-motor drive structure according to claim 3, characterized in that: The fiber optic pressure sensor uses a Bragg grating array, which is arranged at 50 cm intervals along the axial direction of the composite rope, with a wavelength resolution of 0.1 pm and a monitoring frequency of 1 kHz. The data is synchronized in real time with the digital twin platform through a fiber optic Bragg grating demodulator.

5. The method for operating a multi-motor drive structure according to claim 4, characterized in that: The titanium alloy flywheel assembly is forged from TC4 titanium alloy, has a diameter of 1.2-1.5m, a thickness of 0.3-0.5m, an inertia density of ≥200kJ / kg, and the flywheel surface is plasma nitrided, with a surface hardness of ≥800HV, and operates in a sealed cavity with a vacuum degree of ≤10-3Pa.

6. The method for operating a multi-motor drive structure according to claim 5, characterized in that: It also includes a vacuum insulation pipe, which has a double-layer stainless steel structure. The inner layer is a corrugated pipe and the outer layer is a rigid sheath. The interlayer is evacuated to ≤10-2Pa and filled with a nano-aerogel insulation layer with a thermal conductivity coefficient of ≤0.02W / (m·K). The two ends of the pipe are airtightly connected to the flywheel group and the contour structure through flanges.

7. The method for operating a multi-motor drive structure according to claim 6, characterized in that: The digital twin platform has a built-in three-dimensional physics engine that maps the flywheel stress field, temperature field and composite rope deformation data in real time, and integrates a life prediction model to calculate the remaining life of components based on the Weibull distribution algorithm with an error of ≤5%, and supports blockchain encrypted storage of operation logs.

8. The method for operating a multi-motor drive structure according to claim 7, characterized in that: The phase change material is a paraffin-expanded graphite composite phase changer with a phase change temperature of 65±5°C and a latent heat of ≥180kJ / kg. It is encapsulated in an aluminum alloy honeycomb structure with a filling rate of ≥85%. The thermoelectric generator is a bismuth telluride-based module with a thermoelectric conversion efficiency of ≥8%.

9. The method for operating a multi-motor drive structure according to claim 8, characterized in that: The number of turns of the excitation coil of the magnetorheological damper is 500-800, the current control range is 0-5A, the response time is ≤10ms, and the feedback control relationship between the damping force and the vibration acceleration satisfies F=K·a 2 , where K is 0.5-1.2N·s 2 / m 2 , the vibration frequency suppression range is 50-500Hz.

10. The method for operating a multi-motor drive structure according to claim 9, characterized in that: The microcapsule repair agent is a two-component epoxy resin, component A contains glycidyl ether epoxy resin, and component B contains polyamide curing agent. The capsule wall thickness is 5-10 μm, the curing time after the repair agent is released is 30-60 minutes, and the tensile strength recovery rate after repair is ≥90%.

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