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Volume 45,Issue 1,2018 Table of Contents
2018, 45(1):1-6, 29.
Abstract:
The development process of China′s threephase asynchronous motor were discussed, the main representative products were JO, JO2, Y, Y2, Y3, YX3, YE2, YE3 series threephase asynchronous motor. The international standard of threephase asynchronous motor series products since 1978 were introduced, and Equivalent to the adoption of international standard IEC6003430 in recent years and combined with the actual situation of small and medium motor products in China, the energy efficiency classification of threephase asynchronous motors was analyzed.
The development process of China′s threephase asynchronous motor were discussed, the main representative products were JO, JO2, Y, Y2, Y3, YX3, YE2, YE3 series threephase asynchronous motor. The international standard of threephase asynchronous motor series products since 1978 were introduced, and Equivalent to the adoption of international standard IEC6003430 in recent years and combined with the actual situation of small and medium motor products in China, the energy efficiency classification of threephase asynchronous motors was analyzed.
2018, 45(1):7-11.
Abstract:
Aimed at the stability problem of distribution network (microgrid) caused by “low inertia and underdamping”, while distributed power integrated in, such as wind energy, photovoltaic, energy storage and so on, virtual synchronous generator (VSG) simulated synchronous generator characteristic had been studied. Based on the droop control, the converter power electronic device would have synchronous generator rotor inertia and damping characteristics by the design of the electromagnetic equation and the mechanical equation, so it had the capability of primary frequency and voltage regulation. In view of the contradiction between dynamic and steady state characteristics of VSG output power, an improved VSG scheme was proposed. Finally, the correctness and effectiveness of the proposed model and control strategy were verified by MATLAB/Simulink simulation.
Aimed at the stability problem of distribution network (microgrid) caused by “low inertia and underdamping”, while distributed power integrated in, such as wind energy, photovoltaic, energy storage and so on, virtual synchronous generator (VSG) simulated synchronous generator characteristic had been studied. Based on the droop control, the converter power electronic device would have synchronous generator rotor inertia and damping characteristics by the design of the electromagnetic equation and the mechanical equation, so it had the capability of primary frequency and voltage regulation. In view of the contradiction between dynamic and steady state characteristics of VSG output power, an improved VSG scheme was proposed. Finally, the correctness and effectiveness of the proposed model and control strategy were verified by MATLAB/Simulink simulation.
2018, 45(1):12-17, 40.
Abstract:
A robust composite nonlinear servo controller design was proposed in discretetime domain for typical motor servo systems. The unknown disturbance and uncertainties in the system were lumped into a ramp signal (with a constant rate of change), and a reducedorder linear extended state observer was designed to estimate the unmeasured state and the unknown disturbance. The controller was then applied to a permanent magnet synchronous motor (PMSM) servo system. MATLAB simulation was first conducted, followed by experimental tests based on a TMS320F28335DSC. The results verify that the system, in the face of a variety of disturbances, was capable of tracking the target positions fast, smoothly and accurately, with a good robustness.
A robust composite nonlinear servo controller design was proposed in discretetime domain for typical motor servo systems. The unknown disturbance and uncertainties in the system were lumped into a ramp signal (with a constant rate of change), and a reducedorder linear extended state observer was designed to estimate the unmeasured state and the unknown disturbance. The controller was then applied to a permanent magnet synchronous motor (PMSM) servo system. MATLAB simulation was first conducted, followed by experimental tests based on a TMS320F28335DSC. The results verify that the system, in the face of a variety of disturbances, was capable of tracking the target positions fast, smoothly and accurately, with a good robustness.
2018, 45(1):18-22.
Abstract:
Presented the design method for controlling stepping motor. Combined with MCU and FPGA and incremental encoder, a complete motion control platform was constructed. The system consisted of bus interface unit, loop control unit, PWM pulse width modulation unit and LMD18200 drive unit. The practice showed that the driving logic of LMD18200 could make the stepper motor run stably and efficiently. It could effectively reduce the noise during the operation of the motor and the vibration during start and stop. The method was better than most conventional stepper motor driving methods.
Presented the design method for controlling stepping motor. Combined with MCU and FPGA and incremental encoder, a complete motion control platform was constructed. The system consisted of bus interface unit, loop control unit, PWM pulse width modulation unit and LMD18200 drive unit. The practice showed that the driving logic of LMD18200 could make the stepper motor run stably and efficiently. It could effectively reduce the noise during the operation of the motor and the vibration during start and stop. The method was better than most conventional stepper motor driving methods.
2018, 45(1):23-29.
Abstract:
In the permanent magnet synchronous motor (PMSM) drive system, it was difficult to achieve good dynamic performance and low energy consumption only by the signal controller or the energy controller. Therefore, presented a coordinated control strategy based on signal and energy. In order to speed up the dynamic response of PMSM, the signal controller was designed based on backstepping method. From the point of view of energy, the energy controller was designed by using the EulerLagrange (EL) model of passive control in order to reduce the energy loss of PMSM. At last, the coordination function was used to combine the above methods together. In addition, the methods of load torque estimation and controller design were developed when the load torque was unknown. Simulation was implemented by using MATLAB/Simulink, and its results showed that the coordinated control strategy could fully combine the advantages of the signal controller and the energy controller to improve the dynamic and steady state performance,minimize the energy loss of the system.
In the permanent magnet synchronous motor (PMSM) drive system, it was difficult to achieve good dynamic performance and low energy consumption only by the signal controller or the energy controller. Therefore, presented a coordinated control strategy based on signal and energy. In order to speed up the dynamic response of PMSM, the signal controller was designed based on backstepping method. From the point of view of energy, the energy controller was designed by using the EulerLagrange (EL) model of passive control in order to reduce the energy loss of PMSM. At last, the coordination function was used to combine the above methods together. In addition, the methods of load torque estimation and controller design were developed when the load torque was unknown. Simulation was implemented by using MATLAB/Simulink, and its results showed that the coordinated control strategy could fully combine the advantages of the signal controller and the energy controller to improve the dynamic and steady state performance,minimize the energy loss of the system.
2018, 45(1):30-34, 98.
Abstract:
A method of reference adaptive control theory (MRAS) to estimate the speed and position of the motor was presented. PMSM as the reference model, the stator current equation with variable speed as the adjustable model. Popov stability theory as a basis to design adaptive rate, when the adjustable model was equivalent to the reference model, speed estimation s equivalent to the true value. The simulation model was built by MATLAB/Simulink, and the simulation results showed that the sensorless control based on MRAS had a good recognition effect.
A method of reference adaptive control theory (MRAS) to estimate the speed and position of the motor was presented. PMSM as the reference model, the stator current equation with variable speed as the adjustable model. Popov stability theory as a basis to design adaptive rate, when the adjustable model was equivalent to the reference model, speed estimation s equivalent to the true value. The simulation model was built by MATLAB/Simulink, and the simulation results showed that the sensorless control based on MRAS had a good recognition effect.
2018, 45(1):35-40.
Abstract:
Mathematical model of the 3D rigid pendulum constructed by MATLAB, based on experimental platform, fuzzy controller or it combined with the P controller controlled (permanent magnet synchronous motor, PMSM) and posture of 3D rigid pendulum, fuzzy controller programming was edited through LABVIEW, and we could observe control curve of 3D rigid pendulum in PC. The results showed that the fuzzy control strategy was effective for 3D rigid pendulum in actual engineering.
Mathematical model of the 3D rigid pendulum constructed by MATLAB, based on experimental platform, fuzzy controller or it combined with the P controller controlled (permanent magnet synchronous motor, PMSM) and posture of 3D rigid pendulum, fuzzy controller programming was edited through LABVIEW, and we could observe control curve of 3D rigid pendulum in PC. The results showed that the fuzzy control strategy was effective for 3D rigid pendulum in actual engineering.
2018, 45(1):41-45, 63.
Abstract:
In order to improve the safety and design of shipboard power system, the influence of spare parts configuration on the vulnerability of shipboard power network was studied. A twoobjective optimization model was proposed to reduce the cost, quality, volume and other constraints. The objectives of optimization model were norm of comprehensive vulnerability degree and resource consumption scale. The initial allocation spare parts of each node in the shipboard power network were determined according to the satisfaction rate. Then, the optimization model was optimized by the marginal optimization algorithm. The purpose of improving the network robustness of the shipboard power system was realized through the reasonable allocation of spare parts. Finally, the model and the algorithm were verified by the example of complex ring shipboard power network.
In order to improve the safety and design of shipboard power system, the influence of spare parts configuration on the vulnerability of shipboard power network was studied. A twoobjective optimization model was proposed to reduce the cost, quality, volume and other constraints. The objectives of optimization model were norm of comprehensive vulnerability degree and resource consumption scale. The initial allocation spare parts of each node in the shipboard power network were determined according to the satisfaction rate. Then, the optimization model was optimized by the marginal optimization algorithm. The purpose of improving the network robustness of the shipboard power system was realized through the reasonable allocation of spare parts. Finally, the model and the algorithm were verified by the example of complex ring shipboard power network.
2018, 45(1):46-50.
Abstract:
The permanent magnet flux identification system of permanent magnet synchronous motor based on MRAS under the condition of speed sensorless control was studied. Only the speed and permanent magnetic flux were estimated. It satisfies a identification model of full rank and avoids the problem of different initial values different identification values. The convergence and uniqueness of parameter estimation were also ensured. The essence of the rank deficient problem and deduct the identification adaptive law of speed and permanent magnet flux respectively were analyzied. The simulation results showed that the control system could accurately track the speed of the rotor under the speed and load transient change, and had good robustness, with reduced sensitivity on the parameters.
The permanent magnet flux identification system of permanent magnet synchronous motor based on MRAS under the condition of speed sensorless control was studied. Only the speed and permanent magnetic flux were estimated. It satisfies a identification model of full rank and avoids the problem of different initial values different identification values. The convergence and uniqueness of parameter estimation were also ensured. The essence of the rank deficient problem and deduct the identification adaptive law of speed and permanent magnet flux respectively were analyzied. The simulation results showed that the control system could accurately track the speed of the rotor under the speed and load transient change, and had good robustness, with reduced sensitivity on the parameters.
10 Axial Vibration Suppression Strategy of Bearingless Slice MotorBased on Flux Linkage Identification
2018, 45(1):51-56, 68.
Abstract:
The axial vibration suppression strategy of BPMSM based on flux linkage was put forward, the axial offset of the rotor could be evaluated by the calculate the flux linkage of the slice rotor, and based the offset, the reference value of daxial current component (i*d) was given to adjust the axial restoring force of the rotor. The experiment results showed that the proposed the control strategy could suppress the axial vibration of the motor, the system had fine antidisturbance and dynamic permanence.
The axial vibration suppression strategy of BPMSM based on flux linkage was put forward, the axial offset of the rotor could be evaluated by the calculate the flux linkage of the slice rotor, and based the offset, the reference value of daxial current component (i*d) was given to adjust the axial restoring force of the rotor. The experiment results showed that the proposed the control strategy could suppress the axial vibration of the motor, the system had fine antidisturbance and dynamic permanence.
2018, 45(1):57-63.
Abstract:
Aiming at the problem of realtime perturbation of the motor parameters affected by the operating conditions during the operation of the permanent magnet synchronous motor (PMSM), a multiparameter parallel online identification algorithm for PMSM based on rank deficient steady equation was proposed. The coefficient matrix of the steady state equation of PMSM was analyzed, and the steady state equation of PMSM was the rank deficient equation with the rank number of two and three unknown parameters was pointed out. Based on the theory of Lyapunov stability and Popov super stability theory, the PMSM model reference adaptive multiparameter parallel identifiers were designed. By designing reasonable adaptive law, the reference adaptive system is gradually stabilized, and the motor stator resistance, inductance and rotor flux were identified correspondly. The experimental results verified the validity and practicability of the proposed algorithm.
Aiming at the problem of realtime perturbation of the motor parameters affected by the operating conditions during the operation of the permanent magnet synchronous motor (PMSM), a multiparameter parallel online identification algorithm for PMSM based on rank deficient steady equation was proposed. The coefficient matrix of the steady state equation of PMSM was analyzed, and the steady state equation of PMSM was the rank deficient equation with the rank number of two and three unknown parameters was pointed out. Based on the theory of Lyapunov stability and Popov super stability theory, the PMSM model reference adaptive multiparameter parallel identifiers were designed. By designing reasonable adaptive law, the reference adaptive system is gradually stabilized, and the motor stator resistance, inductance and rotor flux were identified correspondly. The experimental results verified the validity and practicability of the proposed algorithm.
2018, 45(1):64-68.
Abstract:
The electromagnetic field finite element numerical model of the reactor, considered the hysteresis effect of the ironcore, was derived by combining the JA model and the numerical analysis method. The electromagnetic field distribution of the reactor was analyzed by using the two methods of single value basic magnetization curve and hysteresis loop, respectively. The results showed that the magnetic hysteresis had a great influence on the calculation results of the electromagnetic field distribution of the reactor. The electromagnetic field computing model considering the hysteresis effect of the ironcore lays a foundation for further research on the reactor heat.
The electromagnetic field finite element numerical model of the reactor, considered the hysteresis effect of the ironcore, was derived by combining the JA model and the numerical analysis method. The electromagnetic field distribution of the reactor was analyzed by using the two methods of single value basic magnetization curve and hysteresis loop, respectively. The results showed that the magnetic hysteresis had a great influence on the calculation results of the electromagnetic field distribution of the reactor. The electromagnetic field computing model considering the hysteresis effect of the ironcore lays a foundation for further research on the reactor heat.
2018, 45(1):69-76.
Abstract:
As the high speed non-salient pole synchronous generator electromagnetic vibration was prominent, the air gap magnetic field and the radial electromagnetic force wave of the synchronous generator were analyzed and calculated by the finite element method.The influence of different magnetic permeability slot wedges and different number of slots on the electromagnetic vibration force of the motor was studied and summarized, and the optimization scheme of reducing the electromagnetic vibration was formed.The correctness of the analysis and calculation of the radial electromagnetic force wave was verified by the comparison of the vibration frequency of the motor foot and the electromagnetic vibration force wave spectrum.On the basis of this, the electromagnetic vibration under the optimization scheme was estimated, the rotor tooth harmonic acceleration was reduced by 13.5 dB and the total vibration level was reduced by 4.6 dB, and the validity of the optimization scheme is verified. The relevant analytical method and optimization measure provided a reliable reference for suppressing the electromagnetic vibration of the high speed generators.
As the high speed non-salient pole synchronous generator electromagnetic vibration was prominent, the air gap magnetic field and the radial electromagnetic force wave of the synchronous generator were analyzed and calculated by the finite element method.The influence of different magnetic permeability slot wedges and different number of slots on the electromagnetic vibration force of the motor was studied and summarized, and the optimization scheme of reducing the electromagnetic vibration was formed.The correctness of the analysis and calculation of the radial electromagnetic force wave was verified by the comparison of the vibration frequency of the motor foot and the electromagnetic vibration force wave spectrum.On the basis of this, the electromagnetic vibration under the optimization scheme was estimated, the rotor tooth harmonic acceleration was reduced by 13.5 dB and the total vibration level was reduced by 4.6 dB, and the validity of the optimization scheme is verified. The relevant analytical method and optimization measure provided a reliable reference for suppressing the electromagnetic vibration of the high speed generators.
2018, 45(1):77-82.
Abstract:
In order to study the vibration and noise of the induction motor under practical working conditions, a database of magnetization and magnetostrictive curves of silicon steel under different harmonic excitations was tested. Based on the measured constitutive relations, an electromagnetomechanical coupled numerical model for the motor core was presented. Considering the electromagnetic force and magnetostriction effect of silicon steel, the magnetic field and mechanical field were calculated for the induction motor. The distribution of the magnetic flux density, stress and vibration of the motor were obtained from the calculation. And the influence of different harmonics on the vibration was analyzed, which provided the theoretical basis for vibration and noise reduction of induction motors.
In order to study the vibration and noise of the induction motor under practical working conditions, a database of magnetization and magnetostrictive curves of silicon steel under different harmonic excitations was tested. Based on the measured constitutive relations, an electromagnetomechanical coupled numerical model for the motor core was presented. Considering the electromagnetic force and magnetostriction effect of silicon steel, the magnetic field and mechanical field were calculated for the induction motor. The distribution of the magnetic flux density, stress and vibration of the motor were obtained from the calculation. And the influence of different harmonics on the vibration was analyzed, which provided the theoretical basis for vibration and noise reduction of induction motors.
2018, 45(1):83-88, 93.
Abstract:
The stator current was first demodulated by the TeagerKaiser energy operator, thus this could effectively eliminate the effect of the supply component spectral leakage on extracting the speed harmonic component. Then the influence of SDTFT on the precision of speed estimation was analyzed, and a new method for mSDTFT frequency analysis used to speed estimation was proposed. The mSDTFT method largely reduced the computational overhead, especially for certain spectrum lines that need. The mSDTFT method also could improve the flexibility and effectiveness of spectral analysis. Experimental results showed that the proposed method could validity extract the speed harmonic component under different load conditions, and had high precision of speed estimation.
The stator current was first demodulated by the TeagerKaiser energy operator, thus this could effectively eliminate the effect of the supply component spectral leakage on extracting the speed harmonic component. Then the influence of SDTFT on the precision of speed estimation was analyzed, and a new method for mSDTFT frequency analysis used to speed estimation was proposed. The mSDTFT method largely reduced the computational overhead, especially for certain spectrum lines that need. The mSDTFT method also could improve the flexibility and effectiveness of spectral analysis. Experimental results showed that the proposed method could validity extract the speed harmonic component under different load conditions, and had high precision of speed estimation.
2018, 45(1):89-93.
Abstract:
The current loop mathematical model was at first analyzed, then the closedloop transfer function of the current loop was derived, it was pointed out that bandwidth was inversely proportional to system delay times. The traditional PMSM current loop delay times based on digital signal processor (DSC) was relatively large, the greater the speed change, the more obvious the impact of bandwidth, while PMSM current loop delay times based on fieldprogrammable gate array (FPGA) could be reduced one times, which improved the response of the speed loop, and experimental results verified the theoretical analysis.
The current loop mathematical model was at first analyzed, then the closedloop transfer function of the current loop was derived, it was pointed out that bandwidth was inversely proportional to system delay times. The traditional PMSM current loop delay times based on digital signal processor (DSC) was relatively large, the greater the speed change, the more obvious the impact of bandwidth, while PMSM current loop delay times based on fieldprogrammable gate array (FPGA) could be reduced one times, which improved the response of the speed loop, and experimental results verified the theoretical analysis.
17 Research & Application of Hysteresis controlled MRAS Method forSpeed Estimation in Induction Motor
2018, 45(1):94-98.
Abstract:
Based on existing Model Reference Adaptive System (MRAS), a hysteresis controlled MRAS system was proposed, which had better steady and dynamic performance in both low and high frequency range. Theoretical analysis and experiment results display that this method was feasible, and had good robustness for stator resistor.
Based on existing Model Reference Adaptive System (MRAS), a hysteresis controlled MRAS system was proposed, which had better steady and dynamic performance in both low and high frequency range. Theoretical analysis and experiment results display that this method was feasible, and had good robustness for stator resistor.
18 Comparative Study of Optimized 6/8 Switched Flux Permanent MagnetMachine with Different Constraints
2018, 45(1):99-106.
Abstract:
The comparative study of optimized switched flux permanent magnet machine (SFPMM) with different load conditions and constrains was presented. By taken a 6/8 SFPMM as example, the sensitivity of parameters was investigated to decide the optimized sequence. With the different constrains, such as lightload、rated、overload conditions, the 6/8 SFPMM was optimized at fixed copper loss、fixed current、fixed current density. By comparing the torque density, PM volume, losses and efficiency of the optimized designs, the effective constraint to optimize the SFPMM will be obtained.
The comparative study of optimized switched flux permanent magnet machine (SFPMM) with different load conditions and constrains was presented. By taken a 6/8 SFPMM as example, the sensitivity of parameters was investigated to decide the optimized sequence. With the different constrains, such as lightload、rated、overload conditions, the 6/8 SFPMM was optimized at fixed copper loss、fixed current、fixed current density. By comparing the torque density, PM volume, losses and efficiency of the optimized designs, the effective constraint to optimize the SFPMM will be obtained.
2018, 45(1):107-113.
Abstract:
A novel current sensorless drive system with only position sensor for permanent magnet synchronous motor (PMSM) drove in order to reduce costs and avoid problems caused by faults of the current sensor was proposed. Generally, a PMSM drive controller needs at least two phasecurrent sensors, the current sensors was omitted by replacing estimated stator current with extended Kalman filter. A simulation study was performed in order to compare performances with and without current sensor, it showed that the control had almost the same performance and ability as the conventional control.
A novel current sensorless drive system with only position sensor for permanent magnet synchronous motor (PMSM) drove in order to reduce costs and avoid problems caused by faults of the current sensor was proposed. Generally, a PMSM drive controller needs at least two phasecurrent sensors, the current sensors was omitted by replacing estimated stator current with extended Kalman filter. A simulation study was performed in order to compare performances with and without current sensor, it showed that the control had almost the same performance and ability as the conventional control.
2018, 45(1):114-115, 122.
Abstract:
Compound introduced the motor stator laminations and rotor discs a stamping forming of blanking die, stator laminations, rotor discs by ladder rushed inside and outside the stator, rotor, stator groove inside and outside the circle round the separation of the mold in the key rotor intensive was both a blade and a stripper plate, all adopt the die steel manufacturing. The whole cutting process, a process with only could complete, greatly increased production efficiency, saves the manpower, reduces the production cost, improved the precision of the stator laminations.
Compound introduced the motor stator laminations and rotor discs a stamping forming of blanking die, stator laminations, rotor discs by ladder rushed inside and outside the stator, rotor, stator groove inside and outside the circle round the separation of the mold in the key rotor intensive was both a blade and a stripper plate, all adopt the die steel manufacturing. The whole cutting process, a process with only could complete, greatly increased production efficiency, saves the manpower, reduces the production cost, improved the precision of the stator laminations.
2018, 45(1):116-122.
Abstract:
It was predicted the life of above mentioned materials such as theNBR O seal ring、the HNBR O seal ring and the electrode coated with epoxy resin through the high temperature and accelerated aging test in the Freon F113. According to the experimental results, the HNBR O seal ring could meet the seal requirement after ten years, it’s aging life expectancy was 37.5 years under operating conditions.
It was predicted the life of above mentioned materials such as theNBR O seal ring、the HNBR O seal ring and the electrode coated with epoxy resin through the high temperature and accelerated aging test in the Freon F113. According to the experimental results, the HNBR O seal ring could meet the seal requirement after ten years, it’s aging life expectancy was 37.5 years under operating conditions.
2018, 45(1):123-126, 130.
Abstract:
A test system based on programmable logic controller (PLC) was designed to provide engineering and technical personnel with easy to handle characteristics testing equipment of ultrasonic motor. The pulse signal of the torque sensor was output to the highspeed input port of the PLC. According to the testing requirements of ultrasonic motor, the torque and rotation speed were tested and displayed by using the ladder diagram, through the pulse input of torque sensor. Through the manmachine interface of programmable logic controller, the touch screen controls the testing of the ultrasonic motor. The testing system could complete four kinds of modes, such as the mechanical characteristic test of ultrasonic motor, automatic loading and unloading test, ultrasonic motor starting characteristic test with load and ultrasonic motor manual test. The system was verified by experiments. The system was easy to operate.
A test system based on programmable logic controller (PLC) was designed to provide engineering and technical personnel with easy to handle characteristics testing equipment of ultrasonic motor. The pulse signal of the torque sensor was output to the highspeed input port of the PLC. According to the testing requirements of ultrasonic motor, the torque and rotation speed were tested and displayed by using the ladder diagram, through the pulse input of torque sensor. Through the manmachine interface of programmable logic controller, the touch screen controls the testing of the ultrasonic motor. The testing system could complete four kinds of modes, such as the mechanical characteristic test of ultrasonic motor, automatic loading and unloading test, ultrasonic motor starting characteristic test with load and ultrasonic motor manual test. The system was verified by experiments. The system was easy to operate.
2018, 45(1):127-130.
Abstract:
The test system for the performance test of servo motor and system characteristic was introduced. The system adopted the energy feedback method to carried out the load test of the AC / DC servo motor system of the servo motor and the controller of 0.75~110 kW.
The test system for the performance test of servo motor and system characteristic was introduced. The system adopted the energy feedback method to carried out the load test of the AC / DC servo motor system of the servo motor and the controller of 0.75~110 kW.
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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.
