Mobile website
Volume 44,Issue 6,2017 Table of Contents
2017, 44(6):1-7, 18.
Abstract:
Inwheel motor drive technology represents an essential development direction in new energy vehicle drive system. The technical requirements and drive form were introduced. The technical requirements and drive form of inwheel motor drive were summarized. Current research situation of inwheel motor drive technology was compared and analyzed briefly. The key technique problems of inwheel motor technology were proposed. The essential technologies in descreasing unsprung mass, restraining vertical vibration effect and reducing torque ripple of inwheel motor were discussed, which were supposed to be solved urgently. The development trend of inwheel motor drive technology was predicted.
Inwheel motor drive technology represents an essential development direction in new energy vehicle drive system. The technical requirements and drive form were introduced. The technical requirements and drive form of inwheel motor drive were summarized. Current research situation of inwheel motor drive technology was compared and analyzed briefly. The key technique problems of inwheel motor technology were proposed. The essential technologies in descreasing unsprung mass, restraining vertical vibration effect and reducing torque ripple of inwheel motor were discussed, which were supposed to be solved urgently. The development trend of inwheel motor drive technology was predicted.
2017, 44(6):8-12.
Abstract:
Multimotor synchronous and coordinate system was widely used in the field of motor control. The control strategy played a important role in the performance of multimotor synchronization system. Domestic and foreign scholars had conducted deep research, who aimed at the problem of multimotor synchronization.They put forward a variety of synchronization control strategies. The control strategies proposed at home and abroad were reviewed. The accuracy of tracking, robustness and capacity of antiload of the control object were analyzed. The new prospect of multimotor synchronization control was proposed.
Multimotor synchronous and coordinate system was widely used in the field of motor control. The control strategy played a important role in the performance of multimotor synchronization system. Domestic and foreign scholars had conducted deep research, who aimed at the problem of multimotor synchronization.They put forward a variety of synchronization control strategies. The control strategies proposed at home and abroad were reviewed. The accuracy of tracking, robustness and capacity of antiload of the control object were analyzed. The new prospect of multimotor synchronization control was proposed.
2017, 44(6):13-18.
Abstract:
Due to the amplitude and frequency of output voltage of inverter was unstable with conventional droop control in microgrid, an improved adaptive droop control was proposed, which added error feedback of voltage and frequency. So it could reduce the deviation of output voltage amplitude and frequency when loads suddenly changed. At the same time the traditional threephase inverter control based on the dqrotating coordinate system, the assault of power to grid was very large, but control based on αβstationary coordinate system could effectively reduce the assault of power to grid, and it improved the stability of the system. Through the MATLAB simulation, verified the feasibility of the system which used the method proposed.
Due to the amplitude and frequency of output voltage of inverter was unstable with conventional droop control in microgrid, an improved adaptive droop control was proposed, which added error feedback of voltage and frequency. So it could reduce the deviation of output voltage amplitude and frequency when loads suddenly changed. At the same time the traditional threephase inverter control based on the dqrotating coordinate system, the assault of power to grid was very large, but control based on αβstationary coordinate system could effectively reduce the assault of power to grid, and it improved the stability of the system. Through the MATLAB simulation, verified the feasibility of the system which used the method proposed.
4 Control of Permanent Magnet Synchronous Motor Based onSuper Spiral Sliding Model Variable Structure
2017, 44(6):19-23, 30.
Abstract:
According to the mathematical model of the permanent magnet synchronous motor based on the αβcoordinate system, the traditional direct torque control system simulation model was built by using the Simulink stool in MATLAB. According to characteristics of the system of magnetic flux and torque output fluctuations, supertwisting synovial variable structure control strategy based on, in the dqcoordinate system design flux and torque controller, then built the simulation model, in the new model, hysteresis comparator was replaced by torque controller and flux linkage controller, it was concluded that the improved system of electromagnetic torque and motor speed of response curve. By comparing the curve of the traditional direct torque control system, the results showed that the electromagnetic torque curve of the improved system was significantly reduced, and the speed response was obviously accelerated.
According to the mathematical model of the permanent magnet synchronous motor based on the αβcoordinate system, the traditional direct torque control system simulation model was built by using the Simulink stool in MATLAB. According to characteristics of the system of magnetic flux and torque output fluctuations, supertwisting synovial variable structure control strategy based on, in the dqcoordinate system design flux and torque controller, then built the simulation model, in the new model, hysteresis comparator was replaced by torque controller and flux linkage controller, it was concluded that the improved system of electromagnetic torque and motor speed of response curve. By comparing the curve of the traditional direct torque control system, the results showed that the electromagnetic torque curve of the improved system was significantly reduced, and the speed response was obviously accelerated.
2017, 44(6):24-30.
Abstract:
To solve a lot of trigonometric calculations in the space vector pulse width modulation of the traditional two level inverter, and the harmonic content was higher in output voltage. The SVPWM algorithm based on 60° coordinate system was studied. The method of two level and three level inverter SVPWM in 60° coordinate system was deeply analyzed. Through the MATLAB/Simulink software simulation to verify the adopted method of three level inverter SVPWM based on 60° coordinate system could omit complex trigonometric functions, and reduced the output voltage harmonic content, and made the output voltage waveform more sinusoidal.
To solve a lot of trigonometric calculations in the space vector pulse width modulation of the traditional two level inverter, and the harmonic content was higher in output voltage. The SVPWM algorithm based on 60° coordinate system was studied. The method of two level and three level inverter SVPWM in 60° coordinate system was deeply analyzed. Through the MATLAB/Simulink software simulation to verify the adopted method of three level inverter SVPWM based on 60° coordinate system could omit complex trigonometric functions, and reduced the output voltage harmonic content, and made the output voltage waveform more sinusoidal.
6 Speed Sensorless Control of Permanent Magnet Synchronous MotorBased on Fuzzy Sliding Mode Observer
2017, 44(6):31-34.
Abstract:
To solve many defects existing in the mechanical speed sensor of servo system, a fuzzy sliding mode speed observer was proposed for the feed system of the permanent magnet synchronous motor. Focused on the chattering problem of conventional sliding mode observer (SMO), sigmoid function was used instead of the traditional ideal switch function and fuzzy control system was used to adjust the gain of the SMO. This method could decrease undesirable chattering phenomenon and realized the soft control. Detecting back EMF could be done directly from switching signal without any low pass filter. So the delay time because of lowpass filter, in the proposed observer was eliminated and there was no need to compensate phase fault in position estimating. The asymptotic stability of the designed sliding mode observer was proved by Lyapunov function. The simulation results showed that the designed fuzzy sliding mode observer could accurately identify the rotor speed of PMSM, and had good dynamic and static performance.
To solve many defects existing in the mechanical speed sensor of servo system, a fuzzy sliding mode speed observer was proposed for the feed system of the permanent magnet synchronous motor. Focused on the chattering problem of conventional sliding mode observer (SMO), sigmoid function was used instead of the traditional ideal switch function and fuzzy control system was used to adjust the gain of the SMO. This method could decrease undesirable chattering phenomenon and realized the soft control. Detecting back EMF could be done directly from switching signal without any low pass filter. So the delay time because of lowpass filter, in the proposed observer was eliminated and there was no need to compensate phase fault in position estimating. The asymptotic stability of the designed sliding mode observer was proved by Lyapunov function. The simulation results showed that the designed fuzzy sliding mode observer could accurately identify the rotor speed of PMSM, and had good dynamic and static performance.
2017, 44(6):35-39.
Abstract:
Because of the nonlinear and strong coupling characteristics of switched reluctance motor (SRM), the traditional control method was difficult to achieve satisfactory results. A sliding mode variable structure control method for the three stage linear switching line was introduced. This method was different from the conventional variable structure control. It could make the motor run on the sliding mode from the beginning, and ensures that the system sliding mode could be reached. Its main characteristic was simple and easy to implement. The simulation results showed that the method could quickly and stably track the given speed. It had good adaptability and robustness.
Because of the nonlinear and strong coupling characteristics of switched reluctance motor (SRM), the traditional control method was difficult to achieve satisfactory results. A sliding mode variable structure control method for the three stage linear switching line was introduced. This method was different from the conventional variable structure control. It could make the motor run on the sliding mode from the beginning, and ensures that the system sliding mode could be reached. Its main characteristic was simple and easy to implement. The simulation results showed that the method could quickly and stably track the given speed. It had good adaptability and robustness.
2017, 44(6):40-44, 96.
Abstract:
Due to the parameters of the controller were fixed, the control effect of permanent magnet synchronous motor position servo system was not satisfying. So we design a fuzzy logic controller based on bacterial foraging optimization algorithm (BFOA). Based on the theory of space vector control, the position control system was three closed loop control system of permanent magnet synchronous motor which was consisted of the position loop, speed loop and current loop. The fuzzy logic controller was applied to the position loop in the MATLAB/Simulink environment. The simulation results showed that compared with the traditional PID method, the fuzzy control scheme based on BFOA had better control quality and stronger ability of restraint interference, and could effectively improve the rapidity and accuracy of the motor position control.
Due to the parameters of the controller were fixed, the control effect of permanent magnet synchronous motor position servo system was not satisfying. So we design a fuzzy logic controller based on bacterial foraging optimization algorithm (BFOA). Based on the theory of space vector control, the position control system was three closed loop control system of permanent magnet synchronous motor which was consisted of the position loop, speed loop and current loop. The fuzzy logic controller was applied to the position loop in the MATLAB/Simulink environment. The simulation results showed that compared with the traditional PID method, the fuzzy control scheme based on BFOA had better control quality and stronger ability of restraint interference, and could effectively improve the rapidity and accuracy of the motor position control.
2017, 44(6):45-50.
Abstract:
The inertia variation of the AC servo system highly influences the servo performance. In order to improve the dynamic performance of the servo system, it’s necessary to identify the system inertia and to auto tune servo controller at real time. Online inertia identification method based on MRAS was introduced. A MRAS method with dynamic adaptive gain and filter time was presented to solve the contradiction between identification speed and accuracy. The symmetrical optimum method was used to tune the servo control loop automatically with the identified inertia. The consistent and robust performance of servo controller was obtained in this way. Simulation and experiment results showed the effectiveness of the proposed method.
The inertia variation of the AC servo system highly influences the servo performance. In order to improve the dynamic performance of the servo system, it’s necessary to identify the system inertia and to auto tune servo controller at real time. Online inertia identification method based on MRAS was introduced. A MRAS method with dynamic adaptive gain and filter time was presented to solve the contradiction between identification speed and accuracy. The symmetrical optimum method was used to tune the servo control loop automatically with the identified inertia. The consistent and robust performance of servo controller was obtained in this way. Simulation and experiment results showed the effectiveness of the proposed method.
2017, 44(6):51-56.
Abstract:
Designed the electric steering gear control system of brushless torque motor based FPGA platform, the test and application showed that the system was small、no reduction mechanism、fast response、the bigger output torque and high accuracy control. It was fitted for guided bomb in the rudder control system.
Designed the electric steering gear control system of brushless torque motor based FPGA platform, the test and application showed that the system was small、no reduction mechanism、fast response、the bigger output torque and high accuracy control. It was fitted for guided bomb in the rudder control system.
11 Parameters Identification of PMSM Based on Recurrence Least Square andHardware in The Loop Platform
2017, 44(6):57-62.
Abstract:
For the case that owe rank may be caused in the multiple Parameters Identification of PMSM, a method that multiple parameters were identified individually using least square method was introduced. Then the resistance, inductance and flux linkage were identified based on recurrence least square (RLS) and hardware in the loop (HIL) platform. Finally , considering the great temperature influence, the resistance and flux linkage were identified. The method was verified that it could accurately identify the motor parameters.
For the case that owe rank may be caused in the multiple Parameters Identification of PMSM, a method that multiple parameters were identified individually using least square method was introduced. Then the resistance, inductance and flux linkage were identified based on recurrence least square (RLS) and hardware in the loop (HIL) platform. Finally , considering the great temperature influence, the resistance and flux linkage were identified. The method was verified that it could accurately identify the motor parameters.
2017, 44(6):63-66.
Abstract:
Taking an asynchronous traction motor as an example, introduced the process and the principles of the motor cooling system design. Firstly, the improvement measures of the flow distribution were proposed based on analysis of the flow characteristics of the coolant in the motor. Secondly, the calculated value and the experimental value of the stator winding temperature rise were compared, and the results showed that the calculation method was feasible. Finally, the impact of altitude on the properties of air and the motor wingding temperature rise was analyzed, and the importance of considering the operating environment in the design of cooling system was emphasized. The design thinking and conclusions had certain referential value for the cooling design of asynchronous traction motor.
Taking an asynchronous traction motor as an example, introduced the process and the principles of the motor cooling system design. Firstly, the improvement measures of the flow distribution were proposed based on analysis of the flow characteristics of the coolant in the motor. Secondly, the calculated value and the experimental value of the stator winding temperature rise were compared, and the results showed that the calculation method was feasible. Finally, the impact of altitude on the properties of air and the motor wingding temperature rise was analyzed, and the importance of considering the operating environment in the design of cooling system was emphasized. The design thinking and conclusions had certain referential value for the cooling design of asynchronous traction motor.
2017, 44(6):67-73.
Abstract:
Electric vehicle traction motor is in the pursuit of high density, small and light weight, which constantly promotes the cooling and heat transfer technology and the development of the motor. So electromagneticthermal codesign method of traction motor was researched. By constructing an engineering stator thermal circuit model, the direct design method of stator winding thermal performance and key thermal parameters were proposed and directly applied to the electromagnetic design, which strengthened thermal performance design as well as made up for the defect of assessing the thermal performance by thermal load value in the traditional electromagnetic design. Thermal performance of different designs could also be compared through the rapid assessment of motor heat transfer ability and winding temperature rise, thus, get the best solution of electromagneticthermal codesign and enhance output torque during the motor continuous operation. A permanent magnet synchronous motor with liquidcoolinghousing was optimized by the direct design method of stator winding thermal performance, which could significantly reduce the stator winding temperature rise. At last, the temperature rise experiment verified the effectiveness of the direct design method of stator winding thermal performance as well as the evaluation of the thermal performance by the key thermal parameters.
Electric vehicle traction motor is in the pursuit of high density, small and light weight, which constantly promotes the cooling and heat transfer technology and the development of the motor. So electromagneticthermal codesign method of traction motor was researched. By constructing an engineering stator thermal circuit model, the direct design method of stator winding thermal performance and key thermal parameters were proposed and directly applied to the electromagnetic design, which strengthened thermal performance design as well as made up for the defect of assessing the thermal performance by thermal load value in the traditional electromagnetic design. Thermal performance of different designs could also be compared through the rapid assessment of motor heat transfer ability and winding temperature rise, thus, get the best solution of electromagneticthermal codesign and enhance output torque during the motor continuous operation. A permanent magnet synchronous motor with liquidcoolinghousing was optimized by the direct design method of stator winding thermal performance, which could significantly reduce the stator winding temperature rise. At last, the temperature rise experiment verified the effectiveness of the direct design method of stator winding thermal performance as well as the evaluation of the thermal performance by the key thermal parameters.
2017, 44(6):74-78.
Abstract:
Electromagnetic noise of induction motor was studied. The reason of an electric vehicle traction induction motor having larger noload noise was analyzed, and the main sources were positioned. Based on the Ansys Workbench multiphysical field simulation analysis platform, the electromagneticstructureacoustic field simulation model was established, the electromagnetic noise of the prototype was predicted. Through the noise spectrum of experimental test comparing with the finite element simulation, the correctness of the simulation analysis of electromagnetic noise was verified. Theoretical analysis of the electromagnetic force wave,which caused the noise of the prototype was carried out, and the electromagnetic noise was suppressed by changing the stator and rotor slot, and the correctness of the method was verified by the noise test.
Electromagnetic noise of induction motor was studied. The reason of an electric vehicle traction induction motor having larger noload noise was analyzed, and the main sources were positioned. Based on the Ansys Workbench multiphysical field simulation analysis platform, the electromagneticstructureacoustic field simulation model was established, the electromagnetic noise of the prototype was predicted. Through the noise spectrum of experimental test comparing with the finite element simulation, the correctness of the simulation analysis of electromagnetic noise was verified. Theoretical analysis of the electromagnetic force wave,which caused the noise of the prototype was carried out, and the electromagnetic noise was suppressed by changing the stator and rotor slot, and the correctness of the method was verified by the noise test.
2017, 44(6):79-83, 90.
Abstract:
The electromagnetic design of the high speed ratio asynchronous motor, that was, to meet the high speed weak magnetic area torque, but also to overcome the low speed when the magnetic passing through saturation. 1 600 kW asynchronous motor as an example, analysis of the equivalent circuit parameters change characteristics, the low speed torque, efficiency, voltage, current and power factor curve drawing, and the magnetic flux density, magnetic permeability distribution, distribution and temperature rise time loss under different conditions were calculated by the motor type test. The design met the technical requirements.
The electromagnetic design of the high speed ratio asynchronous motor, that was, to meet the high speed weak magnetic area torque, but also to overcome the low speed when the magnetic passing through saturation. 1 600 kW asynchronous motor as an example, analysis of the equivalent circuit parameters change characteristics, the low speed torque, efficiency, voltage, current and power factor curve drawing, and the magnetic flux density, magnetic permeability distribution, distribution and temperature rise time loss under different conditions were calculated by the motor type test. The design met the technical requirements.
2017, 44(6):84-90.
Abstract:
At present, the research on fivephase induction motors has continuously accelerated on the basis of the design, manufacture, and parameter calculation of fivephase induction motors. The overall design of a small fivephase induction motor was completed and provided, accomplishing the manufacture of a prototype machine. The multiloop mathematical model of fivephase induction motors was established, and moreover, all the parameters in this kind of model were calculated, taking the prototype machine as an example. Finally, experimental and simulation results were provided to validate the above work.
At present, the research on fivephase induction motors has continuously accelerated on the basis of the design, manufacture, and parameter calculation of fivephase induction motors. The overall design of a small fivephase induction motor was completed and provided, accomplishing the manufacture of a prototype machine. The multiloop mathematical model of fivephase induction motors was established, and moreover, all the parameters in this kind of model were calculated, taking the prototype machine as an example. Finally, experimental and simulation results were provided to validate the above work.
17 Error Analysis of Position Detection for Sensorless Permanent BrushlessDC Motor Position Detection
2017, 44(6):91-96.
Abstract:
In sensorless permanent brushless DC motor control systems based on backEMF zerocrossing detection, nonconducting phase voltage was distorted and backEMF zero crossing phase was shifted due to low pass filter and diode freewheeling. This problem was proved by math model, simulation and experiment, then a method of using AD module to detect backEMF zero crossing was presented and finally the method was proved by experiment results.
In sensorless permanent brushless DC motor control systems based on backEMF zerocrossing detection, nonconducting phase voltage was distorted and backEMF zero crossing phase was shifted due to low pass filter and diode freewheeling. This problem was proved by math model, simulation and experiment, then a method of using AD module to detect backEMF zero crossing was presented and finally the method was proved by experiment results.
2017, 44(6):97-100.
Abstract:
The larger capacity of the DC motor, the greater relative armature current. In design, the winding form of high current DC motor usually adopts the double frog winding, and this kind of winding structure is relatively complicated, and there are many factors that affect the commutation ability of the DC motor. By using a brush with different resistivity to make sparkless commutation test in DC motor of test set, and based on comparative analysis on the test results, showed the facts that the split brush could increase the lateral resistance by using high resistivity brush, thereby the short circuit circulation of commutating winding was reduced, and brush spark was eliminated, and motor commutation was improved. At the same time, the tangential dislocation array of the brush was helpful to reduce the reactance electric potential of the commutating winding; therefore, the commutation performance of the motor was greatly improved.
The larger capacity of the DC motor, the greater relative armature current. In design, the winding form of high current DC motor usually adopts the double frog winding, and this kind of winding structure is relatively complicated, and there are many factors that affect the commutation ability of the DC motor. By using a brush with different resistivity to make sparkless commutation test in DC motor of test set, and based on comparative analysis on the test results, showed the facts that the split brush could increase the lateral resistance by using high resistivity brush, thereby the short circuit circulation of commutating winding was reduced, and brush spark was eliminated, and motor commutation was improved. At the same time, the tangential dislocation array of the brush was helpful to reduce the reactance electric potential of the commutating winding; therefore, the commutation performance of the motor was greatly improved.
2017, 44(6):101-103, 119.
Abstract:
In the daily process of manufacturing and testing electric motors, the interturn insulation monitoring of marine generator rotor winding is easy to be ignored due to its low voltage and small current, the simpler structure than the stator, also the standards such as IEC60034 and IEC60092 which International Electrotechnical Commission issued have no explicit requirement. However, based on the reliability of product’s quality and function, it is necessary to test the rotor interturn voltage, especially to the interturn insulation monitoring of highvoltage generator rotor winding in order to demonstrate a satisfactory withstand level of the interturn insulation to steep fronted switching surges. The article take the highvoltage generator rotor winding interturn test as an example, introducing the test methods, the failure phenomenon and abnormal analysis, including the problem of judging the insulation abnormal on generator rotor part by pulse waveform, and earth resistance in the manufacturing process.
In the daily process of manufacturing and testing electric motors, the interturn insulation monitoring of marine generator rotor winding is easy to be ignored due to its low voltage and small current, the simpler structure than the stator, also the standards such as IEC60034 and IEC60092 which International Electrotechnical Commission issued have no explicit requirement. However, based on the reliability of product’s quality and function, it is necessary to test the rotor interturn voltage, especially to the interturn insulation monitoring of highvoltage generator rotor winding in order to demonstrate a satisfactory withstand level of the interturn insulation to steep fronted switching surges. The article take the highvoltage generator rotor winding interturn test as an example, introducing the test methods, the failure phenomenon and abnormal analysis, including the problem of judging the insulation abnormal on generator rotor part by pulse waveform, and earth resistance in the manufacturing process.
2017, 44(6):104-108.
Abstract:
In order to obtain the optimal power scheduling scheme of the wind farm, the input value of the wind speed at any time must be mastered, and then the output power of each wind turbine was obtained. When the measuring instrument of wind speed fails to work properly, the wind speed data of the wind turbine would be wrong or missing. The equation of linear regression was established to find out the relationship among the input wind speed of every unit which could get the wind speed value. When idling abandoned wind occurd in the wind field,the power command would be issued by the grid management department. And the wind farm would produce the active and reactive power with the specified size. Taking the minimum loss of all doubly fed induction generator in wind farm as the objective function, the scheme of active and reactive power dispatch was determined. The model of wind field was established by software MATLAB, and the simulation results verified the feasibility of the scheduling model.
In order to obtain the optimal power scheduling scheme of the wind farm, the input value of the wind speed at any time must be mastered, and then the output power of each wind turbine was obtained. When the measuring instrument of wind speed fails to work properly, the wind speed data of the wind turbine would be wrong or missing. The equation of linear regression was established to find out the relationship among the input wind speed of every unit which could get the wind speed value. When idling abandoned wind occurd in the wind field,the power command would be issued by the grid management department. And the wind farm would produce the active and reactive power with the specified size. Taking the minimum loss of all doubly fed induction generator in wind farm as the objective function, the scheme of active and reactive power dispatch was determined. The model of wind field was established by software MATLAB, and the simulation results verified the feasibility of the scheduling model.
2017, 44(6):109-112.
Abstract:
The increasingly large scale of wind power and low voltage ride through technology is becoming mature, there is an urgent need to know the motor inside the low voltage ride through the conditions of the electromagnetic field changes, to provide the basis for the motor fault diagnosis. Electromagnetic field of doublyfed induction generator (DFIG) during the grid voltage drop to different extent of the motor were analyzed, and on this basis, analysis the different and changing trends of the electromagnetic field inside the motor, was used as the basis for the doubly fed wind turbine fault diagnosis.
The increasingly large scale of wind power and low voltage ride through technology is becoming mature, there is an urgent need to know the motor inside the low voltage ride through the conditions of the electromagnetic field changes, to provide the basis for the motor fault diagnosis. Electromagnetic field of doublyfed induction generator (DFIG) during the grid voltage drop to different extent of the motor were analyzed, and on this basis, analysis the different and changing trends of the electromagnetic field inside the motor, was used as the basis for the doubly fed wind turbine fault diagnosis.
2017, 44(6):113-119.
Abstract:
The Photovoltaic (PV) pump system possesses advantages such as pollutionfree and fullyautomatic, which can be applied in a wide area. Thus a PV pump control system based on TMS320F28335 has been designed. The variable voltage variable frequency (VVVF) strategy based on space vector pulse width modulation (SVPWM) was employed in the speed governor of the threephaseasynchronous motor in the system. The MPPT algorithm took advantage of a combination of continuously variable transmission (CVT) and perturbation & observation (P&O) method. The proposed idea has been validated through experiment.
The Photovoltaic (PV) pump system possesses advantages such as pollutionfree and fullyautomatic, which can be applied in a wide area. Thus a PV pump control system based on TMS320F28335 has been designed. The variable voltage variable frequency (VVVF) strategy based on space vector pulse width modulation (SVPWM) was employed in the speed governor of the threephaseasynchronous motor in the system. The MPPT algorithm took advantage of a combination of continuously variable transmission (CVT) and perturbation & observation (P&O) method. The proposed idea has been validated through experiment.
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.
