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Volume 44,Issue 10,2017 Table of Contents
2017, 44(10):1-7, 12.
Abstract:
In recent years, model predictive control technology (MPC) widely used in the high dynamic performance of motor drive system, in order to overcome the traditional MPC technology limited control set (FCS) steady current pulsation problem, a kind of based on mixing control set (MCS) predictive control method of alldigital fuzzy current ripple suppression was put forward. First of all, the analysis of discrete mathematics model alldigital fuzzy predictive control system, and the precision of voltage vector and the correlation between current ripple was analyzed. On this basis, the MCSMPC would voltage source inverter limited number of effective voltage vector, extended to multiple compared with the form of virtual voltage vector, and based on the above online virtual voltage vector to complete the MPC optimization problem; In addition, considering the MCSMPC system parameter sensitivity problem, analyzed the MCSMPC system feedback noise problems were discussed. Finally, set up double 15 kW permanent magnet synchronous motor for prototype test platform for experimental analysis, content analysis including the MCS method of dynamic characteristics, current ripple effect of the steady state. The experimental results showed that the proposed MCSMPC method in retained the traditional predictive control technology, on the basis of high dynamic response, which could effectively reduce the noise of alldigital fuzzy steady current pulsation and operation.
In recent years, model predictive control technology (MPC) widely used in the high dynamic performance of motor drive system, in order to overcome the traditional MPC technology limited control set (FCS) steady current pulsation problem, a kind of based on mixing control set (MCS) predictive control method of alldigital fuzzy current ripple suppression was put forward. First of all, the analysis of discrete mathematics model alldigital fuzzy predictive control system, and the precision of voltage vector and the correlation between current ripple was analyzed. On this basis, the MCSMPC would voltage source inverter limited number of effective voltage vector, extended to multiple compared with the form of virtual voltage vector, and based on the above online virtual voltage vector to complete the MPC optimization problem; In addition, considering the MCSMPC system parameter sensitivity problem, analyzed the MCSMPC system feedback noise problems were discussed. Finally, set up double 15 kW permanent magnet synchronous motor for prototype test platform for experimental analysis, content analysis including the MCS method of dynamic characteristics, current ripple effect of the steady state. The experimental results showed that the proposed MCSMPC method in retained the traditional predictive control technology, on the basis of high dynamic response, which could effectively reduce the noise of alldigital fuzzy steady current pulsation and operation.
2017, 44(10):8-12.
Abstract:
A permanent magnet linear synchronous motor (PMLSM) vector control system based on sliding mode variable structure was designed. Proceeding from the basic work principle of the PMLSM, and then according to the coordinate transformation, the mathematical model of it is established in the two phase synchronous rotating orthogonal coordinate system. The speed regulator was designed based on the sliding mode variable structure and Lyapunov stability theory, which was composed of the PMLSM vector control system based on sliding mode variable structure. In order to demonstrate the effectiveness of the control system, the model of whole system was built and carried out based on the MATLAB/Simulink. Simulation results verified the control system had strong robustness.
A permanent magnet linear synchronous motor (PMLSM) vector control system based on sliding mode variable structure was designed. Proceeding from the basic work principle of the PMLSM, and then according to the coordinate transformation, the mathematical model of it is established in the two phase synchronous rotating orthogonal coordinate system. The speed regulator was designed based on the sliding mode variable structure and Lyapunov stability theory, which was composed of the PMLSM vector control system based on sliding mode variable structure. In order to demonstrate the effectiveness of the control system, the model of whole system was built and carried out based on the MATLAB/Simulink. Simulation results verified the control system had strong robustness.
2017, 44(10):13-18.
Abstract:
The particle swarm optimization (PSO) algorithm has low probability in searching global optimization and premature convergence in the maximum power point tracking (MPPT) control of the wave energy generation system. A novel simulated annealing particle swarm optimization (SAPSO) algorithm was proposed to solve the problem of the traditional PSO. When the speed and position of each particle were updated with SAPSO, the replacement value of the global maximum from all particles was confirmed by comparing the fitness of each particle of the current temperature and the random number value. As a result, the new algorithm could escape local maximum at the premature convergence and quickly discover global optimum solution. The simulation results showed that this novel algorithm could make the wave energy generation system effectively avoid the local optimization and fast achieve global MPPT control. The capture rate of wave energy was improved.
The particle swarm optimization (PSO) algorithm has low probability in searching global optimization and premature convergence in the maximum power point tracking (MPPT) control of the wave energy generation system. A novel simulated annealing particle swarm optimization (SAPSO) algorithm was proposed to solve the problem of the traditional PSO. When the speed and position of each particle were updated with SAPSO, the replacement value of the global maximum from all particles was confirmed by comparing the fitness of each particle of the current temperature and the random number value. As a result, the new algorithm could escape local maximum at the premature convergence and quickly discover global optimum solution. The simulation results showed that this novel algorithm could make the wave energy generation system effectively avoid the local optimization and fast achieve global MPPT control. The capture rate of wave energy was improved.
2017, 44(10):19-24.
Abstract:
In order to improve the realtime performance and control precision of corrugated crosscut machine, on the basis of AC servo control system mathematical modeling, because windows operating system had the shortcoming of weak realtime characteristics, the system “Windows+RTX” as the PC software operating platform was adopted. DSP as the target embedded system, data interaction by using dual port RAM, control system by using neuron PID algorithm, had the advantages of good selflearning ability, adjusting speed fast and small overshoot etc. The study showed that the control system had the advantage of high automation degree, high cutting precision and stable performance.
In order to improve the realtime performance and control precision of corrugated crosscut machine, on the basis of AC servo control system mathematical modeling, because windows operating system had the shortcoming of weak realtime characteristics, the system “Windows+RTX” as the PC software operating platform was adopted. DSP as the target embedded system, data interaction by using dual port RAM, control system by using neuron PID algorithm, had the advantages of good selflearning ability, adjusting speed fast and small overshoot etc. The study showed that the control system had the advantage of high automation degree, high cutting precision and stable performance.
2017, 44(10):25-29, 35.
Abstract:
The favourable current control was required in speed or torque drive system of permanent magnet synchronous motor, so it’s very important for the control of the current loop. In order to improve the transient performance and the robustness, a novel current control method based on deadbeat predictive control and disturbance observer was proposed. By using the good transient response and easy digital realization of predictive control, the current controller was designed based on deadbeat theory, which was greatly dependent on the motor model and the parameters. According to the disturbance caused by the modeling error and parameter variations, a simple disturbance observer was designed, which was used for the feedforward compensation control. The robustness was enhanced effectively. The experiment was complemented on dSPACE, and the results showed that the proposed current control method had good current tracking and strong robust performance in various conditions.
The favourable current control was required in speed or torque drive system of permanent magnet synchronous motor, so it’s very important for the control of the current loop. In order to improve the transient performance and the robustness, a novel current control method based on deadbeat predictive control and disturbance observer was proposed. By using the good transient response and easy digital realization of predictive control, the current controller was designed based on deadbeat theory, which was greatly dependent on the motor model and the parameters. According to the disturbance caused by the modeling error and parameter variations, a simple disturbance observer was designed, which was used for the feedforward compensation control. The robustness was enhanced effectively. The experiment was complemented on dSPACE, and the results showed that the proposed current control method had good current tracking and strong robust performance in various conditions.
2017, 44(10):30-35.
Abstract:
The traditional PI speed controller of has the disadvantages of speed overshoot, long dynamic time, low tracking precision, poor ability of load torque disturbance and recovery. A speed controller was proposed. It was based on the motion equation and the torque equation of the permanent magnet synchronous motor to derive the qaxis current of the control system. A speed controller of permanent magnet synchronous motor was designed according to the Lyapunov stability condition. Compared with the traditional PI speed controller, the controller had no speed overshoot, short dynamic time and high tracking precision, and improved ability of load torque disturbance and recovery. By using MATLAB/Simulink simulation software, the control system model was built and the simulation analysis was carried out. Simulation results showed that the speed controller of PMSM was effective, and it could get a good speed control performance.
The traditional PI speed controller of has the disadvantages of speed overshoot, long dynamic time, low tracking precision, poor ability of load torque disturbance and recovery. A speed controller was proposed. It was based on the motion equation and the torque equation of the permanent magnet synchronous motor to derive the qaxis current of the control system. A speed controller of permanent magnet synchronous motor was designed according to the Lyapunov stability condition. Compared with the traditional PI speed controller, the controller had no speed overshoot, short dynamic time and high tracking precision, and improved ability of load torque disturbance and recovery. By using MATLAB/Simulink simulation software, the control system model was built and the simulation analysis was carried out. Simulation results showed that the speed controller of PMSM was effective, and it could get a good speed control performance.
2017, 44(10):36-41.
Abstract:
The performance of the controller for interior permanent magnet synchronous motor based on artificial neural network is superior to the traditional control method, but it has the problems of large amount of computation and long training time. Aiming at it, an intelligent drive control of interior permanent magnet synchronous motor based on a single artificial neuron algorithm was presented. At first, the mathematical model of the motor and the principles of the current torque control law had been described. Then, the driving controller for the motor based on single artificial neuron had been designed, and the computation and training time had been reduced due to the use of the single neuron and set the iterative boundary. Finally, a small power motor drive test platform was built, and the performance of the new controller was verified by comparing with the traditional PID control.
The performance of the controller for interior permanent magnet synchronous motor based on artificial neural network is superior to the traditional control method, but it has the problems of large amount of computation and long training time. Aiming at it, an intelligent drive control of interior permanent magnet synchronous motor based on a single artificial neuron algorithm was presented. At first, the mathematical model of the motor and the principles of the current torque control law had been described. Then, the driving controller for the motor based on single artificial neuron had been designed, and the computation and training time had been reduced due to the use of the single neuron and set the iterative boundary. Finally, a small power motor drive test platform was built, and the performance of the new controller was verified by comparing with the traditional PID control.
8 SuperTwisting Sliding Mode Control of Speed and Torque inPermanent Magnet Synchronous Machine Drives
2017, 44(10):42-47.
Abstract:
Permanent magnet synchronous motor (PMSM) had many problems such as frequent overshoot, slow response time and so on when using direct torque control (DTC) scheme based on space vector modulation. The traditional speed PI controller and torque PI controller were replaced with the supertwisting sliding mode controller and it was proved that the supertwisting sliding mode controller used in speed loop and torque loop could converge in finite time theoretically. The torque ripple and dynamic response speed of PMSM was studied by MATLAB/Simulink simulation software. The simulation results showed that the supertwisting sliding mode controller and PI controller in DTC of space vector compared with smaller torque ripple, high dynamic response speed and solves the problem of frequent overshoot.
Permanent magnet synchronous motor (PMSM) had many problems such as frequent overshoot, slow response time and so on when using direct torque control (DTC) scheme based on space vector modulation. The traditional speed PI controller and torque PI controller were replaced with the supertwisting sliding mode controller and it was proved that the supertwisting sliding mode controller used in speed loop and torque loop could converge in finite time theoretically. The torque ripple and dynamic response speed of PMSM was studied by MATLAB/Simulink simulation software. The simulation results showed that the supertwisting sliding mode controller and PI controller in DTC of space vector compared with smaller torque ripple, high dynamic response speed and solves the problem of frequent overshoot.
2017, 44(10):48-52, 58.
Abstract:
The modular multilevel converter (MMC) had been widely studied and applied in the medium and high voltage direct current (HVDC) transmission system. The existence of internal circulation was an important phenomenon in MMC. According to the mechanism of MMC topology and its internal circulation, its threephase circulation was divided into 2 DC components based on negativesequence coordinate transformation of double fundamental frequency. And a circulating current suppressing controller was designed. The simulation results showed that the cotroller could effectively suppress the circulation of arm current and reduced the distortion of waveform without negative impacts on MMC external output AC voltage and current.
The modular multilevel converter (MMC) had been widely studied and applied in the medium and high voltage direct current (HVDC) transmission system. The existence of internal circulation was an important phenomenon in MMC. According to the mechanism of MMC topology and its internal circulation, its threephase circulation was divided into 2 DC components based on negativesequence coordinate transformation of double fundamental frequency. And a circulating current suppressing controller was designed. The simulation results showed that the cotroller could effectively suppress the circulation of arm current and reduced the distortion of waveform without negative impacts on MMC external output AC voltage and current.
2017, 44(10):53-58.
Abstract:
Two kinds of direct power control strategy of Doublyfed Induction Generator (DFIG) were presented and made Comparative Study on their performance. According to the mathematical model of DFIG, The direct power control (DPC) model for DFIG was deduced. Firstly, the direct power control based on hysteresis controller (HCDPC) strategy was presented, it implements directly decoupling control between DFIG stator active power and reactive power by hysteresis controller. Secondly, the SVMDPC strategy was designed by applying the SVM technology to DPC. It had no rotor current control loop to implement directly decoupling control between DFIG stator active power and reactive power by PI controller. Finally, simulations and experiments did done for HCDPC and SVMDPC to verify its correctness and feasibility and compare its control performance.
Two kinds of direct power control strategy of Doublyfed Induction Generator (DFIG) were presented and made Comparative Study on their performance. According to the mathematical model of DFIG, The direct power control (DPC) model for DFIG was deduced. Firstly, the direct power control based on hysteresis controller (HCDPC) strategy was presented, it implements directly decoupling control between DFIG stator active power and reactive power by hysteresis controller. Secondly, the SVMDPC strategy was designed by applying the SVM technology to DPC. It had no rotor current control loop to implement directly decoupling control between DFIG stator active power and reactive power by PI controller. Finally, simulations and experiments did done for HCDPC and SVMDPC to verify its correctness and feasibility and compare its control performance.
2017, 44(10):59-62, 66.
Abstract:
In the vector control of permanent magnet synchronous motor (PMSM), according to the principle of Luenberger observer, a based on Luenberger observer of PMSM rotor speed and position estimation method was proposed, an effective solution to some drawbacks of the PMSM due to the installation of mechanical sensors. Using MATLAB/Simulink tool to build the control system simulation model and simulation, simulation results showed that the control system had good control performance. Finally, in STM32F103ZET6 as the control core of the hardware system for algorithm implementation. The experimental results showed that the PMSM control system based on Luenberger observer had high control precision and good stability.
In the vector control of permanent magnet synchronous motor (PMSM), according to the principle of Luenberger observer, a based on Luenberger observer of PMSM rotor speed and position estimation method was proposed, an effective solution to some drawbacks of the PMSM due to the installation of mechanical sensors. Using MATLAB/Simulink tool to build the control system simulation model and simulation, simulation results showed that the control system had good control performance. Finally, in STM32F103ZET6 as the control core of the hardware system for algorithm implementation. The experimental results showed that the PMSM control system based on Luenberger observer had high control precision and good stability.
2017, 44(10):63-66.
Abstract:
Aiming at characteristics of the embedded virtual simulated training of marine power system, a generator simulated method for virtual simulated of embedded marine electric power was proposed in this paper. The simulated methods of generator normal state transition and fault state transition were both presented, which simplified the simulated state of generator. The simplified method not only made the training scene look realistic, but also made the training process meet the realtime requirement in simulated training.
Aiming at characteristics of the embedded virtual simulated training of marine power system, a generator simulated method for virtual simulated of embedded marine electric power was proposed in this paper. The simulated methods of generator normal state transition and fault state transition were both presented, which simplified the simulated state of generator. The simplified method not only made the training scene look realistic, but also made the training process meet the realtime requirement in simulated training.
13 Design and Output Characteristics of Permanent MagnetVibration Generator Using New Halbach Arrays
2017, 44(10):67-71.
Abstract:
A formula of induced electromotive force of leaner vibration generators was presented. Linear permanent magnet vibration generator equipped with the new Halbach arrays was designed, two sets of permanent magnets were fixed on two sides of the body, and the inner six coils were connected in series. Compared with those using the conventional Halbach array and traditional permanent magnets, finite element analysis used, the application of the new Halbach array greatly improves the generators’ performance. The maximum output power was 355.85 W, and the open circuit effective voltage was 6.402 9 V, with the sinusoidal vibration frequency was 10 Hz, and the amplitude was 3 mm. At last, the coils’ relative positioning to magnets was optimized, the maximum output power was up to 414.81 mW, 16.57% improved, and the open circuit effective voltage was 7.036 6 V.
A formula of induced electromotive force of leaner vibration generators was presented. Linear permanent magnet vibration generator equipped with the new Halbach arrays was designed, two sets of permanent magnets were fixed on two sides of the body, and the inner six coils were connected in series. Compared with those using the conventional Halbach array and traditional permanent magnets, finite element analysis used, the application of the new Halbach array greatly improves the generators’ performance. The maximum output power was 355.85 W, and the open circuit effective voltage was 6.402 9 V, with the sinusoidal vibration frequency was 10 Hz, and the amplitude was 3 mm. At last, the coils’ relative positioning to magnets was optimized, the maximum output power was up to 414.81 mW, 16.57% improved, and the open circuit effective voltage was 7.036 6 V.
2017, 44(10):72-76.
Abstract:
Aiming at solving the problem that the linear lumped parameter model of permanent magnet synchronous motor (PMSM) based on inductance cannot describe the nonideal characteristics, such as magnetic saturation and nonsine back electromotive force, a distributed parameter model of PMSM based on flux linkage reconstruction was presented, and the proposed model was verified with simulation and experiment. In detail, first of all, the flux linkage of different working points of the motor was obtained by finite element analysis (FEA). Secondly, the flux linkage was reconstructed by Fourier series expansion and polynomial fitting method, and then the distributed parameter model of PMSM was established according to the reconstructed flux linkage. Finally, simulation and experiment were carried out for verification. Simulation and experimental results showed that the model could accurately describe the nonlinear characteristics of PMSM in different working conditions.
Aiming at solving the problem that the linear lumped parameter model of permanent magnet synchronous motor (PMSM) based on inductance cannot describe the nonideal characteristics, such as magnetic saturation and nonsine back electromotive force, a distributed parameter model of PMSM based on flux linkage reconstruction was presented, and the proposed model was verified with simulation and experiment. In detail, first of all, the flux linkage of different working points of the motor was obtained by finite element analysis (FEA). Secondly, the flux linkage was reconstructed by Fourier series expansion and polynomial fitting method, and then the distributed parameter model of PMSM was established according to the reconstructed flux linkage. Finally, simulation and experiment were carried out for verification. Simulation and experimental results showed that the model could accurately describe the nonlinear characteristics of PMSM in different working conditions.
2017, 44(10):77-82.
Abstract:
A special three phase asynchronous motor applied to top drive facility was studied, which uses the compulsorily ventilation and nonstandard design. Critical techniques, such as nonbase design, ventilation hole of stator iron yoke, epoxy resin sealing at stator winding end, and squirrelcage rotor composed of copper bars were adopted, which satisfy the strict requirements under the condition of frequent start and stop, overloading, and saltmist. Temperaturefluid field coupling model was established, and then the transientstate temperature trends and steadystate temperature distribution of the parts of motor under the rating condition were analyzed. The results of simulation and thermal rising test showed that the temperature in the axial direction was higher at the locations of the posterior segment, and testify that the temperature distribution has no local hot spot. At the same time, experiment verifies that the temperaturefluid field coupling model and result are reasonable, which satisfy the requirement of H level temperature rise. The effect of inlet pressure and ventilation hole diameter change on temperature rise were analyzed on the basis of coupling model, which provides the theoretic foundation for improving cooling structure of motor.
A special three phase asynchronous motor applied to top drive facility was studied, which uses the compulsorily ventilation and nonstandard design. Critical techniques, such as nonbase design, ventilation hole of stator iron yoke, epoxy resin sealing at stator winding end, and squirrelcage rotor composed of copper bars were adopted, which satisfy the strict requirements under the condition of frequent start and stop, overloading, and saltmist. Temperaturefluid field coupling model was established, and then the transientstate temperature trends and steadystate temperature distribution of the parts of motor under the rating condition were analyzed. The results of simulation and thermal rising test showed that the temperature in the axial direction was higher at the locations of the posterior segment, and testify that the temperature distribution has no local hot spot. At the same time, experiment verifies that the temperaturefluid field coupling model and result are reasonable, which satisfy the requirement of H level temperature rise. The effect of inlet pressure and ventilation hole diameter change on temperature rise were analyzed on the basis of coupling model, which provides the theoretic foundation for improving cooling structure of motor.
2017, 44(10):83-87.
Abstract:
Since most torque motors were used as the drive motors, and low speed stability was highly required, a special way of poles with slots was chosen. Selected the 12 pole 39 slots made the motor cogging torque small, but motor threephase windings were asymmetry. There was important significance of research on the method of improving the symmetry of the winding to reduce the impact asymmetry of motor windings to the low speed stability. In a 12 pole 39 slot motor torque case, a method to improve the winding asymmetry was proposed, and the winding arrangement were changed to improve the symmetry of the windings, and the low speed stability of motor could be guaranteed. Finally, the validity of the method were verified by theoretical research and simulation analysis.
Since most torque motors were used as the drive motors, and low speed stability was highly required, a special way of poles with slots was chosen. Selected the 12 pole 39 slots made the motor cogging torque small, but motor threephase windings were asymmetry. There was important significance of research on the method of improving the symmetry of the winding to reduce the impact asymmetry of motor windings to the low speed stability. In a 12 pole 39 slot motor torque case, a method to improve the winding asymmetry was proposed, and the winding arrangement were changed to improve the symmetry of the windings, and the low speed stability of motor could be guaranteed. Finally, the validity of the method were verified by theoretical research and simulation analysis.
2017, 44(10):88-93.
Abstract:
In order to fulfill the requirement of stator flux identification accuracy in the calculation of airgap torque, puts forward a stator flux online identification algorithm based on a new pure integral method, which used mulriple simpson integral model. Compared with the traditional trapezoidal integral method, this model improved the identification precision of the stator flux; while compared with the new stator flux observer based on lowpass filter, it was more simple and easy to operate and implement. Through MATLAB/Simulink platform, a simulation system was built. The results showed that the algorithm eliminate the major drawbacks of traditional integration method and solve the integral saturation and initial value problems. The stator flux estimated used the new algorithm essentially coincident with the theoretical results, showed the higher reliability of the algorithm.
In order to fulfill the requirement of stator flux identification accuracy in the calculation of airgap torque, puts forward a stator flux online identification algorithm based on a new pure integral method, which used mulriple simpson integral model. Compared with the traditional trapezoidal integral method, this model improved the identification precision of the stator flux; while compared with the new stator flux observer based on lowpass filter, it was more simple and easy to operate and implement. Through MATLAB/Simulink platform, a simulation system was built. The results showed that the algorithm eliminate the major drawbacks of traditional integration method and solve the integral saturation and initial value problems. The stator flux estimated used the new algorithm essentially coincident with the theoretical results, showed the higher reliability of the algorithm.
2017, 44(10):94-101.
Abstract:
A new positive and negative sequence component separation method was proposed to solve the problem that the traditional PhaseLocked Loop (PLL) can not obtain the phase accurately by using the conventional Software PLL (SPLL) under the condition of grid voltage unbalance. It used the phase Sequence Decoupling Resonant (SDR) controller to better perform the highorder harmonic filtering effect and the Delayed signal cancellation (DSC) have characteristics that could filter out of the specific harmonics, combine SDR and the DSC to achieve a good positive and negative sequence Component separation effect. Finally, the simulation results of MATLAB/Simulink showed that the proposed method was feasible and effective.
A new positive and negative sequence component separation method was proposed to solve the problem that the traditional PhaseLocked Loop (PLL) can not obtain the phase accurately by using the conventional Software PLL (SPLL) under the condition of grid voltage unbalance. It used the phase Sequence Decoupling Resonant (SDR) controller to better perform the highorder harmonic filtering effect and the Delayed signal cancellation (DSC) have characteristics that could filter out of the specific harmonics, combine SDR and the DSC to achieve a good positive and negative sequence Component separation effect. Finally, the simulation results of MATLAB/Simulink showed that the proposed method was feasible and effective.
2017, 44(10):102-105, 118.
Abstract:
Compared with motor, the rotor structure of electric motor was more complex, which included host and exciter, in result, the accurate calculation of the generator critical speed was highly difficult but indispensable. The rotor critical speed of 4P turbogenerator of 15MW was analyzed and calculated based on the theory of transfer matrix method, and the corresponding equivalent method was explained in detail. The method was verified by actual date and cases, and it was convenient in engineering application.
Compared with motor, the rotor structure of electric motor was more complex, which included host and exciter, in result, the accurate calculation of the generator critical speed was highly difficult but indispensable. The rotor critical speed of 4P turbogenerator of 15MW was analyzed and calculated based on the theory of transfer matrix method, and the corresponding equivalent method was explained in detail. The method was verified by actual date and cases, and it was convenient in engineering application.
20 Analysis of Design Parameters and Test Validation of YE3 Series (IP23)ThreePhase Asynchronous Motors
2017, 44(10):106-109.
Abstract:
The overall structure of the new design of YE3 series (IP23) threephase asynchronous motor, which directly affected the motor selection of various design parameters. The selection of design values such as stray loss, mechanical loss and air gap were compared and analyzed, and combined with prototype test data to verified the rationality of the values.
The overall structure of the new design of YE3 series (IP23) threephase asynchronous motor, which directly affected the motor selection of various design parameters. The selection of design values such as stray loss, mechanical loss and air gap were compared and analyzed, and combined with prototype test data to verified the rationality of the values.
2017, 44(10):110-113.
Abstract:
A multitorque load system due to the load test only at a fixed speed in traditional variable frequency motor experiment system was studied. Based on the character of induction machine, the multitorque load system set up mathematical model and calculate to regulate the service voltage and frequency swiftly. Hence many kinds of dynamic load were simulated. The operating principle was illustrated, simulating methods and analysis of the system, which attested to reliability of the load system in meeting the demand for the experiment.
A multitorque load system due to the load test only at a fixed speed in traditional variable frequency motor experiment system was studied. Based on the character of induction machine, the multitorque load system set up mathematical model and calculate to regulate the service voltage and frequency swiftly. Hence many kinds of dynamic load were simulated. The operating principle was illustrated, simulating methods and analysis of the system, which attested to reliability of the load system in meeting the demand for the experiment.
2017, 44(10):114-118.
Abstract:
By the performance requirements of the electric vehicle, a design and optimization method of switched reluctance motor (SRM) for electric vehicle was presented. First, the motor was predesigned, then used the Ansoft to check motor performance. The main structural parameters of the motor were analyzed and optimized to got the optimal result.
By the performance requirements of the electric vehicle, a design and optimization method of switched reluctance motor (SRM) for electric vehicle was presented. First, the motor was predesigned, then used the Ansoft to check motor performance. The main structural parameters of the motor were analyzed and optimized to got the optimal result.
2017, 44(10):119-123.
Abstract:
Aiming at the motor drive control system of electric vehicle for using permanent magnet synchronous motor with vector control, in order to improve its capability of resisting load disturbance, and when the electric vehicle was running at low speed, it could output large torque. A sliding mode speed controller was designed to improve the exponential reaching law of sliding mode variable structure control. In order to reduce chattering of the sliding mode variable structure control, the saturation function was introduced instead of the sign function. At the same time, considering the hysteresis in sliding mode speed controller, the saturation function and the integral signal are multiplied, so that the response speed could be improved and the disturbance rejection capability could be enhanced. Simulation results showed that when the load was changed, the sliding mode speed controller had strong stability, which could made the electric vehicle output large torque at low speed.
Aiming at the motor drive control system of electric vehicle for using permanent magnet synchronous motor with vector control, in order to improve its capability of resisting load disturbance, and when the electric vehicle was running at low speed, it could output large torque. A sliding mode speed controller was designed to improve the exponential reaching law of sliding mode variable structure control. In order to reduce chattering of the sliding mode variable structure control, the saturation function was introduced instead of the sign function. At the same time, considering the hysteresis in sliding mode speed controller, the saturation function and the integral signal are multiplied, so that the response speed could be improved and the disturbance rejection capability could be enhanced. Simulation results showed that when the load was changed, the sliding mode speed controller had strong stability, which could made the electric vehicle output large torque at low speed.
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Electric Machines & Control Application ® 2025
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沪ICP备16038578号-3
Electric Machines & Control Application ® 2025
Supported by:Beijing E-Tiller Technology Development Co., Ltd.
