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Volume 48,Issue 3,2021 Table of Contents
2021, 48(3):1-6.
DOI: 10.12177/emca.2020.213
Abstract:
With the diversified development of electromagnetic launch system (EMLS) application scenarios, a single energy storage device cannot simultaneously meet the high-power-density and high-energy-density energy storage requirements during the launch of different types of loads. The energy storage requirements of EMLS under short-term intermittent operation mode are analyzed, and the current research status and existing defects of EMLS energy storage technology are introduced. On this basis, the key technologies such as energy storage device selection, parallel structure design, capacity configuration, and real-time control that need to be overcome for the application of “lithium battery-supercapacitor” hybrid energy storage to EMLS are discussed and summarized. The future research and development direction of electromagnetic launch hybrid energy storage technology is provided.
With the diversified development of electromagnetic launch system (EMLS) application scenarios, a single energy storage device cannot simultaneously meet the high-power-density and high-energy-density energy storage requirements during the launch of different types of loads. The energy storage requirements of EMLS under short-term intermittent operation mode are analyzed, and the current research status and existing defects of EMLS energy storage technology are introduced. On this basis, the key technologies such as energy storage device selection, parallel structure design, capacity configuration, and real-time control that need to be overcome for the application of “lithium battery-supercapacitor” hybrid energy storage to EMLS are discussed and summarized. The future research and development direction of electromagnetic launch hybrid energy storage technology is provided.
2021, 48(3):7-15.
DOI: 10.12177/emca.2020.214
Abstract:
The current harmonics occur in the common DC bus open-winding permanent magnet synchronous motor (OW-PMSM) and the vibration of the motor is caused by the radial electromagnetic force. In order to solve these problems, a zero vector redistribution random switching frequency space vector pulse width modulation (SVPWM) algorithm based on zero-sequence current closed loop is proposed. The algorithm offsets the common mode voltage generated by the zero vector against that caused by the non-zero voltage vector, and dynamically suppresses the zero-sequence current after the closed loop to reduce the third-order harmonic content of the phase current. At the same time, for the inherent high-frequency harmonic components of the phase current of the modulation strategy, randomization of the switching frequency in SVPWM can greatly reduce the high frequency harmonic amplitude at the switching frequency and its integer multiples. Experimental results show that the algorithm can effectively reduce the current harmonics of high and low frequency bands, and achieve vibration control of the OW-PMSM.
The current harmonics occur in the common DC bus open-winding permanent magnet synchronous motor (OW-PMSM) and the vibration of the motor is caused by the radial electromagnetic force. In order to solve these problems, a zero vector redistribution random switching frequency space vector pulse width modulation (SVPWM) algorithm based on zero-sequence current closed loop is proposed. The algorithm offsets the common mode voltage generated by the zero vector against that caused by the non-zero voltage vector, and dynamically suppresses the zero-sequence current after the closed loop to reduce the third-order harmonic content of the phase current. At the same time, for the inherent high-frequency harmonic components of the phase current of the modulation strategy, randomization of the switching frequency in SVPWM can greatly reduce the high frequency harmonic amplitude at the switching frequency and its integer multiples. Experimental results show that the algorithm can effectively reduce the current harmonics of high and low frequency bands, and achieve vibration control of the OW-PMSM.
2021, 48(3):16-21.
DOI: 10.12177/emca.2020.221
Abstract:
In view of the low rank of the multi-parameter identification mathematical model of permanent magnet synchronous motor (PMSM), the motor parameters are divided into two types: fast change and slow change. The slow identification model and fast identification model are established by combining the slow parameter entry and the steady-state information of the motor, and a step-by-step iterative online identification method is proposed. Based on the steady-state voltage equation of the motor in the rotating coordinate system, the slowly changing parameters is fixed in time and step by step. The forgetting factor recursive least square algorithm can identify the three electrical parameters of the surface permanent magnet synchronous motor (SPMSM). It has small calculation pressure and fast identification speed, which is suitable for engineering application. Experiments are performed based on DSP controller and dynamometer test platform. The experimental results prove that the identification method is feasibility.
In view of the low rank of the multi-parameter identification mathematical model of permanent magnet synchronous motor (PMSM), the motor parameters are divided into two types: fast change and slow change. The slow identification model and fast identification model are established by combining the slow parameter entry and the steady-state information of the motor, and a step-by-step iterative online identification method is proposed. Based on the steady-state voltage equation of the motor in the rotating coordinate system, the slowly changing parameters is fixed in time and step by step. The forgetting factor recursive least square algorithm can identify the three electrical parameters of the surface permanent magnet synchronous motor (SPMSM). It has small calculation pressure and fast identification speed, which is suitable for engineering application. Experiments are performed based on DSP controller and dynamometer test platform. The experimental results prove that the identification method is feasibility.
4 Sliding Mode Control of Permanent Magnet Synchronous Motor Based on Improved Fast Power Reaching Law
2021, 48(3):22-26.
DOI: 10.12177/emca.2020.220
Abstract:
There is a complex relationship between reaching speed and chattering in exponential reaching law of sliding mode control for permanent magnet synchronous motor (PMSM). Based on fast power reaching law, a new reaching law with adaptive adjustment of power coefficient is proposed. The proposed reaching law introduces the system state into the coefficient of power term, and the effect of adding power term in the reaching process of the system state from far to near the sliding surface is realized. On the premise of guaranteeing the characteristics of power term, the convergence speed of the dynamic response process is greatly improved. The load torque is a disturbance term in the sliding mode speed controller. A sliding mode observer with power term is designed, and the observed value is used as the torque feedforward compensation. The simulation results show that: compared with the fast power law, the proposed reaching law has faster convergence speed, and the load observer can accurately track the change of load and improve robustness of the system.
There is a complex relationship between reaching speed and chattering in exponential reaching law of sliding mode control for permanent magnet synchronous motor (PMSM). Based on fast power reaching law, a new reaching law with adaptive adjustment of power coefficient is proposed. The proposed reaching law introduces the system state into the coefficient of power term, and the effect of adding power term in the reaching process of the system state from far to near the sliding surface is realized. On the premise of guaranteeing the characteristics of power term, the convergence speed of the dynamic response process is greatly improved. The load torque is a disturbance term in the sliding mode speed controller. A sliding mode observer with power term is designed, and the observed value is used as the torque feedforward compensation. The simulation results show that: compared with the fast power law, the proposed reaching law has faster convergence speed, and the load observer can accurately track the change of load and improve robustness of the system.
2021, 48(3):27-35.
DOI: 10.12177/emca.2020.211
Abstract:
In the gear driving system with large reduction ratio, the existence of backlash will lead to the weak dynamic performance of the servo system. Aiming at the common analysis method of the backlash with mathematical modeling and simulation, the solid model in the Creo is established and then imported into Adams to run the co-simulation with the MATLAB/Simulink. On this basis, the effectiveness of the dual-motor driving anti-backlash strategy is verified. The extended state observer (ESO) based on the dual-motor model is used to compensate the influence of disturbance. The results show that the dual-motor driving anti-backlash method can solve the problems of the backlash in the gear driving mechanism, and the ESO can suppress the disturbance torque effectively.
In the gear driving system with large reduction ratio, the existence of backlash will lead to the weak dynamic performance of the servo system. Aiming at the common analysis method of the backlash with mathematical modeling and simulation, the solid model in the Creo is established and then imported into Adams to run the co-simulation with the MATLAB/Simulink. On this basis, the effectiveness of the dual-motor driving anti-backlash strategy is verified. The extended state observer (ESO) based on the dual-motor model is used to compensate the influence of disturbance. The results show that the dual-motor driving anti-backlash method can solve the problems of the backlash in the gear driving mechanism, and the ESO can suppress the disturbance torque effectively.
2021, 48(3):36-41.
DOI: 10.12177/emca.2020.208
Abstract:
The traditional model predictive control (MPC) needs to dynamically predict all voltage vectors of permanent magnet synchronous motor (PMSM), which has the problems of large calculation and long calculation period. Therefore, an advanced model predictive current control (MPCC) is proposed. The strategy could reduce the voltage vector selection, reduce the redundancy of the algorithm calculation, and improve the control efficiency. On this basis, the full-order sliding mode observer is used to accurately estimate the rotor position and speed of the PMSM. In the designing process of the full-order sliding mode observer, the idea of fuzzy control is integrated into the traditional sliding mode observer. The improved sliding mode observer could effectively solve the chattering problem of rotor position and speed during observation. Finally, the simulation verifies the correctness and practicability of the proposed strategy.
The traditional model predictive control (MPC) needs to dynamically predict all voltage vectors of permanent magnet synchronous motor (PMSM), which has the problems of large calculation and long calculation period. Therefore, an advanced model predictive current control (MPCC) is proposed. The strategy could reduce the voltage vector selection, reduce the redundancy of the algorithm calculation, and improve the control efficiency. On this basis, the full-order sliding mode observer is used to accurately estimate the rotor position and speed of the PMSM. In the designing process of the full-order sliding mode observer, the idea of fuzzy control is integrated into the traditional sliding mode observer. The improved sliding mode observer could effectively solve the chattering problem of rotor position and speed during observation. Finally, the simulation verifies the correctness and practicability of the proposed strategy.
2021, 48(3):42-48.
DOI: 10.12177/emca.2020.212
Abstract:
Taking the no-load air gap flux density waveform distortion rate of a 48 V permanent magnet synchronous generator (PMSG) for a certain range extender as the optimization object, using the permanent magnet pole arc coefficient, air gap length, magnetic steel thickness, and magnetic pole eccentricity as variables, and the magnetic steel quality and the generator efficiency as the evaluation reference indices, the orthogonal experiment matrix is established by the RMxprt parameterized scanning function and the Taguchi method. The data samples are obtained by the ANSYS Maxwell two-dimensional finite element simulation analysis. Then, the sample data are fitted by the Fourier model to construct the fitness function. Finally, particle swarm optimization (PSO) is used for optimizaiton, and a set of optimal magnetic steel parameters is obtained and verified by finite element method. The results show that using the Taguchi-PSO method, the no-load air gap flux density waveform is greatly improved and the mass of magnetic steel is reduced.
Taking the no-load air gap flux density waveform distortion rate of a 48 V permanent magnet synchronous generator (PMSG) for a certain range extender as the optimization object, using the permanent magnet pole arc coefficient, air gap length, magnetic steel thickness, and magnetic pole eccentricity as variables, and the magnetic steel quality and the generator efficiency as the evaluation reference indices, the orthogonal experiment matrix is established by the RMxprt parameterized scanning function and the Taguchi method. The data samples are obtained by the ANSYS Maxwell two-dimensional finite element simulation analysis. Then, the sample data are fitted by the Fourier model to construct the fitness function. Finally, particle swarm optimization (PSO) is used for optimizaiton, and a set of optimal magnetic steel parameters is obtained and verified by finite element method. The results show that using the Taguchi-PSO method, the no-load air gap flux density waveform is greatly improved and the mass of magnetic steel is reduced.
2021, 48(3):49-54.
DOI: 10.12177/emca.2020.209
Abstract:
The hybrid excitation flux switching linear magnetic suspension motor (HEFSLMSM) used in the traction system of the maglev train is studied. The permanent magnets, excitation windings and armature windings of the motor are all located on the primary short rotor, while the secondary long stator is only composed of magnetic core, which is suitable for the application of the long stator maglev train. Moreover, the motor has a simple structure, low price, sturdiness and durability, which can greatly reduce the system cost. The magnetic levitation operation principle of HEFSLMSM is studied. By establishing the flux and voltage equations of HEFSLMSM, the mathematical models of magnetic levitation force and electromagnetic thrust are deduced. The static characteristics and electromagnetic force of the motor are analyzed by finite element method, and the results show the feasibility of the magnetic suspension operation of the motor.
The hybrid excitation flux switching linear magnetic suspension motor (HEFSLMSM) used in the traction system of the maglev train is studied. The permanent magnets, excitation windings and armature windings of the motor are all located on the primary short rotor, while the secondary long stator is only composed of magnetic core, which is suitable for the application of the long stator maglev train. Moreover, the motor has a simple structure, low price, sturdiness and durability, which can greatly reduce the system cost. The magnetic levitation operation principle of HEFSLMSM is studied. By establishing the flux and voltage equations of HEFSLMSM, the mathematical models of magnetic levitation force and electromagnetic thrust are deduced. The static characteristics and electromagnetic force of the motor are analyzed by finite element method, and the results show the feasibility of the magnetic suspension operation of the motor.
2021, 48(3):55-61.
DOI: 10.12177/emca.2020.206
Abstract:
At present, formed winding is usually used on high-voltage motor stator with open slots matched, which leads to a series of problems such as increasing motor cost, increasing air gap magnetic field harmonic content, and increasing cogging torque. The above problems can be solved by using scattered round copper wire winding. The insulation of scattered windings used in high-voltage motors is the focus of attention and research. Taking a high-voltage scattered winding motor as an example, the reliability of the insulation structure of the high-voltage motor using scattered windings is analyzed by finite element method. The insulation conditions of the turn-to-turn insulation, the main insulation, the interlayer insulation and the end insulation, and the electric field intensity distribution when the main insulation is scratched by the burrs of steel sheet are analyzed respectively. According to the analysis results, the insulation in the motor slot is optimized. A prototype is manufactured and a voltage withstand test is conducted on the prototype. It is verified that the use of scattered windings in the stator of high-voltage motor is feasible to a certain extent, which provides a reference for the design of the stator insulation structure of the high-voltage motor.
At present, formed winding is usually used on high-voltage motor stator with open slots matched, which leads to a series of problems such as increasing motor cost, increasing air gap magnetic field harmonic content, and increasing cogging torque. The above problems can be solved by using scattered round copper wire winding. The insulation of scattered windings used in high-voltage motors is the focus of attention and research. Taking a high-voltage scattered winding motor as an example, the reliability of the insulation structure of the high-voltage motor using scattered windings is analyzed by finite element method. The insulation conditions of the turn-to-turn insulation, the main insulation, the interlayer insulation and the end insulation, and the electric field intensity distribution when the main insulation is scratched by the burrs of steel sheet are analyzed respectively. According to the analysis results, the insulation in the motor slot is optimized. A prototype is manufactured and a voltage withstand test is conducted on the prototype. It is verified that the use of scattered windings in the stator of high-voltage motor is feasible to a certain extent, which provides a reference for the design of the stator insulation structure of the high-voltage motor.
2021, 48(3):62-67.
DOI: 10.12177/emca.2020.207
Abstract:
Based on the basic principle of Park equation, the basic equation of the 6-phase synchronous generator is established, and d-axis and q-axis equivalent circuits of 6-phase synchronous generator are obtained. Comprehensive mutual reactance in equivalent circuits reflects the magnetic coupling function between double Y of the 6-phase synchronous generator. It consists of armature reaction reactance and comprehensive mutual leakage reactance. Through the analysis of single Y operation (the other Y no-load ) and double Y operation of the 6-phase synchronous generator, it can be obtained that double Y synchronous reactance is equal to the difference of 2 times single Y synchronous reactance and self leakage reactance. Taking the example of no-load short-circuit test, the characteristic curve of 6-phase synchronous generator, the d-axis synchronous reactance, the self leakage reactance, and the short-circuit ratio are measured. The steady-state electromagnetic parameters of the 6-phase synchronous generator are verified with the electromagnetic theory analysis and practical operation characteristics.
Based on the basic principle of Park equation, the basic equation of the 6-phase synchronous generator is established, and d-axis and q-axis equivalent circuits of 6-phase synchronous generator are obtained. Comprehensive mutual reactance in equivalent circuits reflects the magnetic coupling function between double Y of the 6-phase synchronous generator. It consists of armature reaction reactance and comprehensive mutual leakage reactance. Through the analysis of single Y operation (the other Y no-load ) and double Y operation of the 6-phase synchronous generator, it can be obtained that double Y synchronous reactance is equal to the difference of 2 times single Y synchronous reactance and self leakage reactance. Taking the example of no-load short-circuit test, the characteristic curve of 6-phase synchronous generator, the d-axis synchronous reactance, the self leakage reactance, and the short-circuit ratio are measured. The steady-state electromagnetic parameters of the 6-phase synchronous generator are verified with the electromagnetic theory analysis and practical operation characteristics.
2021, 48(3):68-74.
DOI: 10.12177/emca.2020.217
Abstract:
Aiming at the problems of low power distribution accuracy, small inertia and circulating power in the traditional control strategy of parallel interfacing converter, a virtual synchronous generator (VSG) control strategy for AC/DC hybrid microgrid parallel interfacing converter is proposed. A small AC voltage signal source is injected into the DC/DC converter of the DC subgrid, and the power-voltage droop control is changed into the power-frequency droop control. Then, the local bus DC voltage collected originally is changed into global DC superimposed frequency, and the difference between the superimposed frequency of DC subgrid and the virtual frequency of VSG is taken as the mechanical torque of VSG. By comparing the simulation results with the traditional control strategy, the effectiveness and superiority of the proposed method are verified.
Aiming at the problems of low power distribution accuracy, small inertia and circulating power in the traditional control strategy of parallel interfacing converter, a virtual synchronous generator (VSG) control strategy for AC/DC hybrid microgrid parallel interfacing converter is proposed. A small AC voltage signal source is injected into the DC/DC converter of the DC subgrid, and the power-voltage droop control is changed into the power-frequency droop control. Then, the local bus DC voltage collected originally is changed into global DC superimposed frequency, and the difference between the superimposed frequency of DC subgrid and the virtual frequency of VSG is taken as the mechanical torque of VSG. By comparing the simulation results with the traditional control strategy, the effectiveness and superiority of the proposed method are verified.
2021, 48(3):75-80.
DOI: 10.12177/emca.2020.219
Abstract:
The number of modular multilevel converter (MMC) sub-modules (SMs) is proportional to the voltage of DC side. When the SM number increases, the switching loss of MMC will increase sharp, so reducing the switching frequency of power devices has been an important research direction of MMC. The nearest level modulation (NLM) is adopted and an improved equal-voltage ranking method based on a full-bridge SM is proposed, aiming to reduce the switching frequency of IGBT in MMC. This method is relatively simple, requires no additional controller and is easy to be extended. Then, 19 simulation models of full-bridge SM are built on MATLAB/Simulink platform to verify the effectiveness of the method. It is verified that the proposed full-bridge SM optimization voltage-sharing strategy can effectively avoid unnecessary repeated switching of IGBT, reduce the switching loss of IGBT, and have no negative effects on the external output characteristics.
The number of modular multilevel converter (MMC) sub-modules (SMs) is proportional to the voltage of DC side. When the SM number increases, the switching loss of MMC will increase sharp, so reducing the switching frequency of power devices has been an important research direction of MMC. The nearest level modulation (NLM) is adopted and an improved equal-voltage ranking method based on a full-bridge SM is proposed, aiming to reduce the switching frequency of IGBT in MMC. This method is relatively simple, requires no additional controller and is easy to be extended. Then, 19 simulation models of full-bridge SM are built on MATLAB/Simulink platform to verify the effectiveness of the method. It is verified that the proposed full-bridge SM optimization voltage-sharing strategy can effectively avoid unnecessary repeated switching of IGBT, reduce the switching loss of IGBT, and have no negative effects on the external output characteristics.
2021, 48(3):81-86.
DOI: 10.12177/emca.2020.199
Abstract:
LLC resonant converter is widely used in medium- and high-power applications. Because of its resonant characteristics, soft switching and the increase of power density can be realized easily. To increase power density and improve output capacity, an asymmetric half bridge interleaved parallel output LLC resonant DC-DC converter is designed. The working process of the converter is analyzed. The influence of different k values on converter is analyzed, and equivalent analysis of resonant network is carried out. Under different resonant frequencies, converters are distributed in different working areas, and the accomplishment level of soft switching process of switching MOS transistor is different. Simulation and prototype test show that the converter can realize zero voltage switch (ZVS). The switching loss of converter is effectively reduced.
LLC resonant converter is widely used in medium- and high-power applications. Because of its resonant characteristics, soft switching and the increase of power density can be realized easily. To increase power density and improve output capacity, an asymmetric half bridge interleaved parallel output LLC resonant DC-DC converter is designed. The working process of the converter is analyzed. The influence of different k values on converter is analyzed, and equivalent analysis of resonant network is carried out. Under different resonant frequencies, converters are distributed in different working areas, and the accomplishment level of soft switching process of switching MOS transistor is different. Simulation and prototype test show that the converter can realize zero voltage switch (ZVS). The switching loss of converter is effectively reduced.
2021, 48(3):87-93.
DOI: 10.12177/emca.2020.216
Abstract:
With the development of new energy grid connection and ultra-high voltage (UHV) DC transmission, the requirement of reactive power regulation for power grid has gradually increased, so large synchronous condensers have been put into use again. A fault diagnosis method based on stochastic subspace identification (SSI) and multi-core support vector machine (MSVM) is proposed to facilitate the fault diagnosis of the synchronous condenser bearing. The vibration sensors are used to collect vibration signals at different positions on the outer surface of the synchronous condenser bearing, and the random subspace model is used for feature extraction. According to Gaussian support vector machine (SVM) and multi-core learning method, a multi-core SVM is constructed. Then, the extracted feature data are imported into the MSVM for fault diagnosis. The experimental results prove that the synchronous condenser bearing fault diagnosis method based on SSI-MSVM is suitable, and the fault can be successfully identified.
With the development of new energy grid connection and ultra-high voltage (UHV) DC transmission, the requirement of reactive power regulation for power grid has gradually increased, so large synchronous condensers have been put into use again. A fault diagnosis method based on stochastic subspace identification (SSI) and multi-core support vector machine (MSVM) is proposed to facilitate the fault diagnosis of the synchronous condenser bearing. The vibration sensors are used to collect vibration signals at different positions on the outer surface of the synchronous condenser bearing, and the random subspace model is used for feature extraction. According to Gaussian support vector machine (SVM) and multi-core learning method, a multi-core SVM is constructed. Then, the extracted feature data are imported into the MSVM for fault diagnosis. The experimental results prove that the synchronous condenser bearing fault diagnosis method based on SSI-MSVM is suitable, and the fault can be successfully identified.
2021, 48(3):94-98.
DOI: 10.12177/emca.2020.218
Abstract:
Vibration test is an important item for driving motor system design verification and electric vehicle reliability. The relationship between Chinese national standards, ISO standards and IEC standards, test conditions and application status of vibration test are briefly analyzed. The shortcomings of vibration test according to the current national standard GB/T 18488.1—2015 are analyzed，and the revision and improvement direction of vibration test standard is discussed.
Vibration test is an important item for driving motor system design verification and electric vehicle reliability. The relationship between Chinese national standards, ISO standards and IEC standards, test conditions and application status of vibration test are briefly analyzed. The shortcomings of vibration test according to the current national standard GB/T 18488.1—2015 are analyzed，and the revision and improvement direction of vibration test standard is discussed.
2021, 48(3):99-103.
DOI: 10.12177/emca.2020.200
Abstract:
The permanent magnet synchronous power generation system of diesel locomotive needs to stably control the intermediate DC link voltage, as well as reduce the voltage pulsation within the full speed range of the internal combustion engine and under sudden load conditions. To meet these requirements, the super-twisting high-order sliding mode algorithm is used to control the voltage of the outer loop to obtain a given torque. Compared with the traditional PI outer loop control, the overshoot of the intermediate DC link voltage is reduced, and the voltage following ability and stability are improved. At the same time, in order to improve the utilization rate of the converter capacity of the power generation system, an improved power factor control strategy is adopted to control the motor based on vector control. Simulation experiments show that the proposed power generation system can obtain a stable and fast-recoverable intermediate DC voltage under the conditions of a wide range of internal combustion engine speed and sudden load. At the same time, the reactive power of the power generation system below the switching torque can basically stabilize near zero. After the switching torque is exceeded, the reactive power remains at a low level, which improves the utilization rate of the converter capacity.
The permanent magnet synchronous power generation system of diesel locomotive needs to stably control the intermediate DC link voltage, as well as reduce the voltage pulsation within the full speed range of the internal combustion engine and under sudden load conditions. To meet these requirements, the super-twisting high-order sliding mode algorithm is used to control the voltage of the outer loop to obtain a given torque. Compared with the traditional PI outer loop control, the overshoot of the intermediate DC link voltage is reduced, and the voltage following ability and stability are improved. At the same time, in order to improve the utilization rate of the converter capacity of the power generation system, an improved power factor control strategy is adopted to control the motor based on vector control. Simulation experiments show that the proposed power generation system can obtain a stable and fast-recoverable intermediate DC voltage under the conditions of a wide range of internal combustion engine speed and sudden load. At the same time, the reactive power of the power generation system below the switching torque can basically stabilize near zero. After the switching torque is exceeded, the reactive power remains at a low level, which improves the utilization rate of the converter capacity.
2021, 48(3):104-109.
DOI: 10.12177/emca.2020.215
Abstract:
In order to reduce the operating energy consumption of high-power locomotive traction motor, an energy-saving control method for locomotive traction motors based on dynamic distribution of traction power is proposed. Firstly, based on field operation data, a mathematical model between traction motor efficiency and its traction effort and running speed is established. Then, using the interval velocity and traction operating curve planned by the automatic driving system, the traction motor energy consumption under different traction distribution strategies is calculated based on the mathematical model. The traction power distribution scheme with the minimum objective function value is selected to control the traction output of each axle of the locomotive. Finally, the proposed method is simulated and analyzed based on the operating data of a certain line and each section of the HXD1 automatic driving locomotive, and the effectiveness of the method is verified.
In order to reduce the operating energy consumption of high-power locomotive traction motor, an energy-saving control method for locomotive traction motors based on dynamic distribution of traction power is proposed. Firstly, based on field operation data, a mathematical model between traction motor efficiency and its traction effort and running speed is established. Then, using the interval velocity and traction operating curve planned by the automatic driving system, the traction motor energy consumption under different traction distribution strategies is calculated based on the mathematical model. The traction power distribution scheme with the minimum objective function value is selected to control the traction output of each axle of the locomotive. Finally, the proposed method is simulated and analyzed based on the operating data of a certain line and each section of the HXD1 automatic driving locomotive, and the effectiveness of the method is verified.
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Electric Machines & Control Application ® 2025
Supported by:Beijing E-Tiller Technology Development Co., Ltd.
沪ICP备16038578号-3
Electric Machines & Control Application ® 2025
Supported by:Beijing E-Tiller Technology Development Co., Ltd.
