Mobile website
Volume 44,Issue 12,2017 Table of Contents
2017, 44(12):1-5, 65.
Abstract:
Permanent magnet synchronous motor (PMSM) was considered as a high order nonlinear system due to the parameter uncertainties and external disturbances. Superior control performance could not be guaranteed by using internal model control (IMC). An exponential convergence controlbased observer was derived to estimate uncertainties. An internal model was set up under the condition that coupling term and back electromotive force were compensated completely. Then, a statespace model for observer was constructed based on output term of IMC and feedback current. Finally the prediction error was obtained to estimate uncertainties. The system was simulated by MATLAB / Simulink. Simulation results showed that by using improved internal model control (IIMC), the disturbance observer could realize the current compensation, suppress the current ripple, reduce the steadystate error, and improve the response of speed, reduce the fluctuation of speed error under load disturbance.
Permanent magnet synchronous motor (PMSM) was considered as a high order nonlinear system due to the parameter uncertainties and external disturbances. Superior control performance could not be guaranteed by using internal model control (IMC). An exponential convergence controlbased observer was derived to estimate uncertainties. An internal model was set up under the condition that coupling term and back electromotive force were compensated completely. Then, a statespace model for observer was constructed based on output term of IMC and feedback current. Finally the prediction error was obtained to estimate uncertainties. The system was simulated by MATLAB / Simulink. Simulation results showed that by using improved internal model control (IIMC), the disturbance observer could realize the current compensation, suppress the current ripple, reduce the steadystate error, and improve the response of speed, reduce the fluctuation of speed error under load disturbance.
2017, 44(12):6-11.
Abstract:
A method to achieve the timesharing output of the same power based on AC/DC electrical source sharing the same main circuit was introduced. The topology of main circuit and its working principle were given. The fivelevel carrier phaseshifting modulating strategy of AC transform and the cascaded phaseshifting control strategy of DC transform were analysed. A phaseanglesynchronous current balancing control strategy was proposed, in order to realize high power DC output and the balance of the power of each phase on the basis of threephase AC converter. Experimental results were obtained with timesharing 115 V/400 Hz/100 kVA AC output and 270 V/80 kW DC output based on the same power supply, which verified the rationality and feasibility of the topology and control strategy.
A method to achieve the timesharing output of the same power based on AC/DC electrical source sharing the same main circuit was introduced. The topology of main circuit and its working principle were given. The fivelevel carrier phaseshifting modulating strategy of AC transform and the cascaded phaseshifting control strategy of DC transform were analysed. A phaseanglesynchronous current balancing control strategy was proposed, in order to realize high power DC output and the balance of the power of each phase on the basis of threephase AC converter. Experimental results were obtained with timesharing 115 V/400 Hz/100 kVA AC output and 270 V/80 kW DC output based on the same power supply, which verified the rationality and feasibility of the topology and control strategy.
2017, 44(12):12-18.
Abstract:
The induction motor drive inverter adopts digital controller and pulsewidth modulation, caused the problem of digital delay, and with the parameter perturbation, reduced the control performance of the traditional indirect field oriented control for induction motor in the field weakening region. To solve this problem, an induction motor optimize controller in field weakening region for electric vehicles based on expert controller and fuzzy inference mechanism was proposed. Highly oscillatory or unstable response may occur if current regulators of the traditional indirect field oriented controller did not obtain proper current commands in the weak magnetic area. So the current reference of speed closedloop output into the first expert controller firstly, then the expert controller changed the current reference based on database and fuzzy inference mechanism, and the fuzzy inference mechanism was realized by the simple Gauss logic function. Finally, a experiment platform for induction motor drive was built, and the high speed motor driving test was carried out. The test results verified the effectiveness of the new control strategy.
The induction motor drive inverter adopts digital controller and pulsewidth modulation, caused the problem of digital delay, and with the parameter perturbation, reduced the control performance of the traditional indirect field oriented control for induction motor in the field weakening region. To solve this problem, an induction motor optimize controller in field weakening region for electric vehicles based on expert controller and fuzzy inference mechanism was proposed. Highly oscillatory or unstable response may occur if current regulators of the traditional indirect field oriented controller did not obtain proper current commands in the weak magnetic area. So the current reference of speed closedloop output into the first expert controller firstly, then the expert controller changed the current reference based on database and fuzzy inference mechanism, and the fuzzy inference mechanism was realized by the simple Gauss logic function. Finally, a experiment platform for induction motor drive was built, and the high speed motor driving test was carried out. The test results verified the effectiveness of the new control strategy.
2017, 44(12):19-24, 80.
Abstract:
Based on the controlled object of small power permanent magnet synchronous motor (PMSM), combined with the main features of digital signal processor TMS320F2812, an overall hardware design scheme had been put forward for the PMSM drive control system. Design of the power driven main circuit had illustrated, signal detection circuit and power supply circuit in detail, meanwhile introduced the main components selection and parameters calculation method. Based on the designed hardware platform, the control system of PMSM had been performed a functional test . Experimental results showed that the hareware design of control system had good reliability with stable performance and high control precision.
Based on the controlled object of small power permanent magnet synchronous motor (PMSM), combined with the main features of digital signal processor TMS320F2812, an overall hardware design scheme had been put forward for the PMSM drive control system. Design of the power driven main circuit had illustrated, signal detection circuit and power supply circuit in detail, meanwhile introduced the main components selection and parameters calculation method. Based on the designed hardware platform, the control system of PMSM had been performed a functional test . Experimental results showed that the hareware design of control system had good reliability with stable performance and high control precision.
2017, 44(12):25-29, 133.
Abstract:
The shaft torsional vibration of control system would cause the oscillation of system control quantity, which would increase mechanical transmission gear wears, and even led to the shaft fracture. The shaft torsional vibration could usually be suppressed by using notch filter on industrial application, but the selection of notch frequency was not considering the factor of control system delay. The influence of control system delay on shaft torsional vibration was analyzed by using the phase diagram of angular velocity increment, shaft torque increment and motor torque increment. Simulation results validated the analytical conclusions.
The shaft torsional vibration of control system would cause the oscillation of system control quantity, which would increase mechanical transmission gear wears, and even led to the shaft fracture. The shaft torsional vibration could usually be suppressed by using notch filter on industrial application, but the selection of notch frequency was not considering the factor of control system delay. The influence of control system delay on shaft torsional vibration was analyzed by using the phase diagram of angular velocity increment, shaft torque increment and motor torque increment. Simulation results validated the analytical conclusions.
2017, 44(12):30-35, 73.
Abstract:
For permanent magnet servo system with large coefficient of viscous friction, traditional adaptive backstepping control could result in fluctuated and unstable identification results and poor performance of speed tracking. Adaptive backstepping controller identifying viscous friction coefficient was proposed, which was used to estimate the inertia, load torque and viscous friction coefficient simultaneously, improved parameter identification accuracy. The method proposed in this paper had merits of simple structure and usability. The validity and accuracy were verified by experiments based on the platform using dSPACE DS1103 system.
For permanent magnet servo system with large coefficient of viscous friction, traditional adaptive backstepping control could result in fluctuated and unstable identification results and poor performance of speed tracking. Adaptive backstepping controller identifying viscous friction coefficient was proposed, which was used to estimate the inertia, load torque and viscous friction coefficient simultaneously, improved parameter identification accuracy. The method proposed in this paper had merits of simple structure and usability. The validity and accuracy were verified by experiments based on the platform using dSPACE DS1103 system.
2017, 44(12):36-42.
Abstract:
In the motor control, the over modulation algorithm could effectively improve the inverter output voltage, of great significance to improve the motor speed. To improve the shortcomings of space vector pulse width modulation DC bus voltage underutilization, a single mode overmodulation algorithm based on SVPWM was studied, carried out the amplitude of the fundamental voltage and the harmonic content of the output voltage. Aimed at the problem that the amplitude of the fundamental output voltage of the overmodulation zone did not coincide with the reference voltage, the controllability analysis was made on the relationship between the target modulation ratio and the given modulation ratio, made the fitting curve and found the function relation and carried out simulation and experimental verification of the overmodulation algorithm. The simulation results and experimental results showed that the theoretical analysis was correct and feasible.
In the motor control, the over modulation algorithm could effectively improve the inverter output voltage, of great significance to improve the motor speed. To improve the shortcomings of space vector pulse width modulation DC bus voltage underutilization, a single mode overmodulation algorithm based on SVPWM was studied, carried out the amplitude of the fundamental voltage and the harmonic content of the output voltage. Aimed at the problem that the amplitude of the fundamental output voltage of the overmodulation zone did not coincide with the reference voltage, the controllability analysis was made on the relationship between the target modulation ratio and the given modulation ratio, made the fitting curve and found the function relation and carried out simulation and experimental verification of the overmodulation algorithm. The simulation results and experimental results showed that the theoretical analysis was correct and feasible.
2017, 44(12):43-46.
Abstract:
In order to improve the security and reliability in the process of producing steel, a servo motor control design of reinforced bending equipment was provided, which include PLC control unit, servo motor, bending servo motor, solenoid valve, cylinder, signal acquisition unit and a touch screen. The signal acquisition unit included the photoelectric switch, magnetic switch and the switch button of the bending equipment. The servo motor control strategy was implemented by PLC controller motion control technology and data processing technology to realize the full digital control equipment, where servo control technology was used to achieve the accurate and efficient movement of the equipment and the energy saving in the process of production. A more humanized operation interface was included for easy operation and bending accuracy. The system accomplished not only high efficiency, energysaving, but also considerable reduction of the labor intensity and the rejection rate, whereby lowers the cost.
In order to improve the security and reliability in the process of producing steel, a servo motor control design of reinforced bending equipment was provided, which include PLC control unit, servo motor, bending servo motor, solenoid valve, cylinder, signal acquisition unit and a touch screen. The signal acquisition unit included the photoelectric switch, magnetic switch and the switch button of the bending equipment. The servo motor control strategy was implemented by PLC controller motion control technology and data processing technology to realize the full digital control equipment, where servo control technology was used to achieve the accurate and efficient movement of the equipment and the energy saving in the process of production. A more humanized operation interface was included for easy operation and bending accuracy. The system accomplished not only high efficiency, energysaving, but also considerable reduction of the labor intensity and the rejection rate, whereby lowers the cost.
2017, 44(12):47-53.
Abstract:
In order to reduce the vibration and acoustic noise of permanent magnet synchronous motor (PMSM) caused by inverter, first, the vibration and noise sources of PMSM caused by inverter were analyzed, and the simulation model build by MATLAB/Simulink was compiled by dSPACE to control a PMSM. Then, the advantages and disadvantages of random switching frequency modulation technique and deadtime compensation technique in reducing the vibration and acoustic noise were compared, and a method that mixed random switching frequency and deadtime compensation was proposed. Finally, the experimental results indicated that the proposed method could integrate the advantages of random switching frequency modulation and deadtime compensation technology, and reduced both the midlow frequency noise and vibration that was caused by current harmonics introduced by inverter and the high frequency noise and vibration that was caused by interaction of switching frequency of inverter and harmonic of current.
In order to reduce the vibration and acoustic noise of permanent magnet synchronous motor (PMSM) caused by inverter, first, the vibration and noise sources of PMSM caused by inverter were analyzed, and the simulation model build by MATLAB/Simulink was compiled by dSPACE to control a PMSM. Then, the advantages and disadvantages of random switching frequency modulation technique and deadtime compensation technique in reducing the vibration and acoustic noise were compared, and a method that mixed random switching frequency and deadtime compensation was proposed. Finally, the experimental results indicated that the proposed method could integrate the advantages of random switching frequency modulation and deadtime compensation technology, and reduced both the midlow frequency noise and vibration that was caused by current harmonics introduced by inverter and the high frequency noise and vibration that was caused by interaction of switching frequency of inverter and harmonic of current.
2017, 44(12):54-57.
Abstract:
Bases on the analysis of the equivalent circuit model and the commutation process of the BLDCM, the effects of electromagnetic time constant and the back EMF to torque ripple were considered, by solving the time what opening and closing phase need, the relationship between the two different operating conditions was analyzed, introducing a variable which called turnon angle, controlling the torque ripple during the phase change by controlling the opening time of the opening phase; and the non ideal air gap magnetic density and other factors to modify the opening angle were considered. Combined with finite element simulation, the results showed that this method was feasible.
Bases on the analysis of the equivalent circuit model and the commutation process of the BLDCM, the effects of electromagnetic time constant and the back EMF to torque ripple were considered, by solving the time what opening and closing phase need, the relationship between the two different operating conditions was analyzed, introducing a variable which called turnon angle, controlling the torque ripple during the phase change by controlling the opening time of the opening phase; and the non ideal air gap magnetic density and other factors to modify the opening angle were considered. Combined with finite element simulation, the results showed that this method was feasible.
11 A Novel Type of Heterpolar Radial Hybrid Magnetic Bearing ParameterDesign and Performance Analysis
2017, 44(12):58-65.
Abstract:
In order to improve the suspension forces within the unit volume produced by radial hybrid magnetic bearing and reduce its manufacturing cost, a novel type of heterpolar radial hybrid magnetic bearing was presented. Compared with the existing magnetic bearing, this magnetic bearing’s structure was compact, volume was smaller, the suspension forces was large within the unit volume, low power consumption and another characteristic. Firstly, the working principle of the novel bearing was analyzed. Then the mathematic model of the bearing was established by the equivalent magnetic circuit method. Therefore, the maximum load capacity of the bearing was listed. Finally, performance of proposed bearing was verified by finite element simulation, finite element analysis and experiment. Results of simulation and experiment had show that this bearing produce the levitation force was large, the linear degree of levitation force with current and rotor displacement was high.
In order to improve the suspension forces within the unit volume produced by radial hybrid magnetic bearing and reduce its manufacturing cost, a novel type of heterpolar radial hybrid magnetic bearing was presented. Compared with the existing magnetic bearing, this magnetic bearing’s structure was compact, volume was smaller, the suspension forces was large within the unit volume, low power consumption and another characteristic. Firstly, the working principle of the novel bearing was analyzed. Then the mathematic model of the bearing was established by the equivalent magnetic circuit method. Therefore, the maximum load capacity of the bearing was listed. Finally, performance of proposed bearing was verified by finite element simulation, finite element analysis and experiment. Results of simulation and experiment had show that this bearing produce the levitation force was large, the linear degree of levitation force with current and rotor displacement was high.
2017, 44(12):66-73.
Abstract:
The finite element method was used to analyze the dynamic characteristics (such as shapes, natural frequencies) of the stator structure of high speed induction motor. The analytical method and the finite element method were used to analyze the electromagnetic force wave of the motor under the rated speed 60 000 r/min. Harmonics of radial air gap flux density and radial electromagnetic force wave were analyzed by Fourier transform. And the harmonic amplitudes at different frequencies were obtained. The electromagnetic force wave were added to the corresponding node of the motor stator. Electromagnetic vibration and sound field of high speed induction spindle motor were analyzed. The electromagnetic noise of the motor under noload and load conditions was calculated.
The finite element method was used to analyze the dynamic characteristics (such as shapes, natural frequencies) of the stator structure of high speed induction motor. The analytical method and the finite element method were used to analyze the electromagnetic force wave of the motor under the rated speed 60 000 r/min. Harmonics of radial air gap flux density and radial electromagnetic force wave were analyzed by Fourier transform. And the harmonic amplitudes at different frequencies were obtained. The electromagnetic force wave were added to the corresponding node of the motor stator. Electromagnetic vibration and sound field of high speed induction spindle motor were analyzed. The electromagnetic noise of the motor under noload and load conditions was calculated.
2017, 44(12):74-80.
Abstract:
In order to reduce the cogging torque, improve the motor power output performance, put forward a method of matching pole arc coefficient of the adjacent pole. Used the Maxwell stress tensor method and Fourier decomposition solve the cogging torque analytical model of the power adaptive motor, and combined the different pole arc coefficients, analysis results showed that the reducing of cogging torque was about 35%. Then, unequal pole arc coefficients were globally optimized by the global optimization algorithm, showed that the cogging torque was further optimized. Finally, the prototype was produced on the basis of the results of theoretical research and given a prototype test, the results showed that: compared to the cogging torque measured data and the results of optimization, the overall error was about 5%, and the overall trend curve matches the optimization. Therefore, in this paper the method of weakening cogging torque of the power adaptive motor was effective and feasible.
In order to reduce the cogging torque, improve the motor power output performance, put forward a method of matching pole arc coefficient of the adjacent pole. Used the Maxwell stress tensor method and Fourier decomposition solve the cogging torque analytical model of the power adaptive motor, and combined the different pole arc coefficients, analysis results showed that the reducing of cogging torque was about 35%. Then, unequal pole arc coefficients were globally optimized by the global optimization algorithm, showed that the cogging torque was further optimized. Finally, the prototype was produced on the basis of the results of theoretical research and given a prototype test, the results showed that: compared to the cogging torque measured data and the results of optimization, the overall error was about 5%, and the overall trend curve matches the optimization. Therefore, in this paper the method of weakening cogging torque of the power adaptive motor was effective and feasible.
2017, 44(12):81-83.
Abstract:
Aiming at the problems existing in the development of IE4 motor with unequal turn winding design,on the basis of MEMC V2.0 version, a new version of the software MEMC V3.0 which could be used to design was developed and the unequal turn winding motor was calculated. It had been used in the YE4 series and YZTE4 series motor design, the results was desired.
Aiming at the problems existing in the development of IE4 motor with unequal turn winding design,on the basis of MEMC V2.0 version, a new version of the software MEMC V3.0 which could be used to design was developed and the unequal turn winding motor was calculated. It had been used in the YE4 series and YZTE4 series motor design, the results was desired.
2017, 44(12):84-93.
Abstract:
Based on the general principle of power system operation, the study of the small signal stability and dynamic stability of the wind storage isolated network system was the key to ensure the reliability of power supply in some areas. Based on the eigenvalue analysis method and the Lyapunov stability criterion of linear system, the problem of small disturbance stability of the wind storage isolated network system was studied. The energy storage inverter control strategy based on droop control mode is proposed, and the corresponding mathematical model was established according to the control strategy of each module of the wind storage isolated network system. Small disturbance stability of mathematical model of each module of the wind storage isolated network system was analysed based on eigenvalue analysis, and the stability judgment of the wind storage isolated network system was determined according to the Lyapunov stability criterion of linear system. Based on the MATLAB/Simulink simulation platform, the simulation model of the wind storage isolated network system was established, and the simulation results showed that the system could achieve stable operation, which was consistent with the small disturbance stability analysis. The research results could provided theoretical reference for the study of the stability of wind storage isolated network system.
Based on the general principle of power system operation, the study of the small signal stability and dynamic stability of the wind storage isolated network system was the key to ensure the reliability of power supply in some areas. Based on the eigenvalue analysis method and the Lyapunov stability criterion of linear system, the problem of small disturbance stability of the wind storage isolated network system was studied. The energy storage inverter control strategy based on droop control mode is proposed, and the corresponding mathematical model was established according to the control strategy of each module of the wind storage isolated network system. Small disturbance stability of mathematical model of each module of the wind storage isolated network system was analysed based on eigenvalue analysis, and the stability judgment of the wind storage isolated network system was determined according to the Lyapunov stability criterion of linear system. Based on the MATLAB/Simulink simulation platform, the simulation model of the wind storage isolated network system was established, and the simulation results showed that the system could achieve stable operation, which was consistent with the small disturbance stability analysis. The research results could provided theoretical reference for the study of the stability of wind storage isolated network system.
16 Calculation of 3D Fluid Fields in the Statorrotor Narrow Gapof the High Speed Permanent Magnet Motor
2017, 44(12):94-99.
Abstract:
In order to explore the flow characteristics of the cooling structure (statorrotor ring gap+stator slots) under the ultrahigh speed, taken a rated speed 120 000 r/min ultrahigh speed PM motor as an example, and studies 3D fluid fields in the statorrotor narrow gap by computational fluid dynamics method with considering the influences of stator slots, axial flow and rotational speed on the flow field. It showed that taylor vortexs in the statorrotor ring gap will disappear for the slotting stator. Furthermore, a high rotational speed and axial flow will enhance the mixing degree of the air in the statorrotor ring gap and the air in the stator slot. The resulted provides a significant reference for the thermal design of rotor of the high speed PM motor.
In order to explore the flow characteristics of the cooling structure (statorrotor ring gap+stator slots) under the ultrahigh speed, taken a rated speed 120 000 r/min ultrahigh speed PM motor as an example, and studies 3D fluid fields in the statorrotor narrow gap by computational fluid dynamics method with considering the influences of stator slots, axial flow and rotational speed on the flow field. It showed that taylor vortexs in the statorrotor ring gap will disappear for the slotting stator. Furthermore, a high rotational speed and axial flow will enhance the mixing degree of the air in the statorrotor ring gap and the air in the stator slot. The resulted provides a significant reference for the thermal design of rotor of the high speed PM motor.
2017, 44(12):100-105.
Abstract:
Dynamic transfer mechanism of the traveling wave rotary ultrasonic motor rotorstator’s contact surface was studied and the key parts stator and cone flexible rotor of ultrasonic motor were designed. Threedimensional contact model and finite element model considering the radial sliding between the rotor and the stator were established. The relation between stator surface particle that amplitude frequency characteristics, resonance speed, radial displacement of ultrasonic motor and tooth height were analyzed. Mass point radial relative displacement of contact surface between the cone flexible rotor, flexible rotor and the stator were contrasted. The cone flexible rotor was better placed on the surface of the stator tooth through its elastic deformation was interpreted. The cone flexible rotor reduces radial slip between the stator and the output efficiency of ultrasonic motor was improved. The displacement trajectory of the stator surface was synthesized in a row wave cycle. The method of the stator mass point elliptical motion drives the rotor rotation was verified. The simulation results were great significantly to the design of rotary ultrasonic motor.
Dynamic transfer mechanism of the traveling wave rotary ultrasonic motor rotorstator’s contact surface was studied and the key parts stator and cone flexible rotor of ultrasonic motor were designed. Threedimensional contact model and finite element model considering the radial sliding between the rotor and the stator were established. The relation between stator surface particle that amplitude frequency characteristics, resonance speed, radial displacement of ultrasonic motor and tooth height were analyzed. Mass point radial relative displacement of contact surface between the cone flexible rotor, flexible rotor and the stator were contrasted. The cone flexible rotor was better placed on the surface of the stator tooth through its elastic deformation was interpreted. The cone flexible rotor reduces radial slip between the stator and the output efficiency of ultrasonic motor was improved. The displacement trajectory of the stator surface was synthesized in a row wave cycle. The method of the stator mass point elliptical motion drives the rotor rotation was verified. The simulation results were great significantly to the design of rotary ultrasonic motor.
2017, 44(12):106-111.
Abstract:
Highspeed motor had some merits such as high power density, contact volume, smaller weight, and could directly drive load, so it had wide application prospects in the fields of aviation, new energy and precision manufacture. The bearingless permanent magnet motor was used in highspeed drive system. Based on the introduction of mathematical model, the design methods of highspeed bearingless permanent magnet type motor were principally discussed. The electromagnetic and mechanical design of a rated speed 8 000 r/min, speed range 0~60 000 r/min, 2 500 W highspeed bearingless permanent magnet motor was accomplished. Both the electromagnetic and dynamic performances of the motor were optimized based on finite element method. The simulation and experimental research results showed that the design method of highspeed bearingless permanent magnet motor proposed was correct and feasible.
Highspeed motor had some merits such as high power density, contact volume, smaller weight, and could directly drive load, so it had wide application prospects in the fields of aviation, new energy and precision manufacture. The bearingless permanent magnet motor was used in highspeed drive system. Based on the introduction of mathematical model, the design methods of highspeed bearingless permanent magnet type motor were principally discussed. The electromagnetic and mechanical design of a rated speed 8 000 r/min, speed range 0~60 000 r/min, 2 500 W highspeed bearingless permanent magnet motor was accomplished. Both the electromagnetic and dynamic performances of the motor were optimized based on finite element method. The simulation and experimental research results showed that the design method of highspeed bearingless permanent magnet motor proposed was correct and feasible.
2017, 44(12):112-118.
Abstract:
The working state of highpower and highspeed motor for energy storage flywheel were motor, generator and noload, to increase the efficiency of energy transformation of energy storage flywheel and to reduce the loss of motors in running were the main targets of electromagnetics design. Analyse winding loss, magnetic core loss and eddy current loss of highpower and highspeed motor for energy storage flywheel, concentrated on the influence of air gap to the stator eddy current loss. At the same time, a kind of cascade rotor permanent magnet structure could meet the low harmonics requirement of the permanent magnet synchronous motor (PMSM). The selection principle of rotor sheath material was proposed. Finally, an example was given to introduce the design analysis and calculation method of the motor.
The working state of highpower and highspeed motor for energy storage flywheel were motor, generator and noload, to increase the efficiency of energy transformation of energy storage flywheel and to reduce the loss of motors in running were the main targets of electromagnetics design. Analyse winding loss, magnetic core loss and eddy current loss of highpower and highspeed motor for energy storage flywheel, concentrated on the influence of air gap to the stator eddy current loss. At the same time, a kind of cascade rotor permanent magnet structure could meet the low harmonics requirement of the permanent magnet synchronous motor (PMSM). The selection principle of rotor sheath material was proposed. Finally, an example was given to introduce the design analysis and calculation method of the motor.
2017, 44(12):119-125.
Abstract:
A highly integrated comprehensive management platform for the smart manufacturing of electric machines was proposed , the industry of which had been commercialized for long but yet in a phase of transitioning and rapid evolution due to the impact of the 4th industry revolution. With a review of electric machine manufacturing process and investigation of operation of motor manufacturers, suggestions are made on the modelling and system integration of electric machine smart manufacturing. The platform presented was intended for the reference of the development of electric motor digital factory and the optimization of its management.
A highly integrated comprehensive management platform for the smart manufacturing of electric machines was proposed , the industry of which had been commercialized for long but yet in a phase of transitioning and rapid evolution due to the impact of the 4th industry revolution. With a review of electric machine manufacturing process and investigation of operation of motor manufacturers, suggestions are made on the modelling and system integration of electric machine smart manufacturing. The platform presented was intended for the reference of the development of electric motor digital factory and the optimization of its management.
2017, 44(12):126-133.
Abstract:
To improve the torque performance of five phase permanent magnet synchronous motor under fault condition, a decoupling fault tolerant control method based on minimum copper loss was proposed. The method which based on the principle of the constant stator magnetic motive force and minimum copper loss could be used to calculating the faulttolerant current. Then, according to the compensation current, the reducedorder transformation matrix had been deduced. In the rotating coordinates, the mathematical model of the fivephase permanentmagnet synchronous motor was established. And the decoupling vector control method is achieved. The effectiveness of the proposed faulttolerant control algorithm is verified by the method of cosimulation. The results of the simulation showed that the proposed faulttolerant control could reduce the torque ripple under the faulty condition.
To improve the torque performance of five phase permanent magnet synchronous motor under fault condition, a decoupling fault tolerant control method based on minimum copper loss was proposed. The method which based on the principle of the constant stator magnetic motive force and minimum copper loss could be used to calculating the faulttolerant current. Then, according to the compensation current, the reducedorder transformation matrix had been deduced. In the rotating coordinates, the mathematical model of the fivephase permanentmagnet synchronous motor was established. And the decoupling vector control method is achieved. The effectiveness of the proposed faulttolerant control algorithm is verified by the method of cosimulation. The results of the simulation showed that the proposed faulttolerant control could reduce the torque ripple under the faulty condition.
You are thevisitor
沪ICP备16038578号-3
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.
