Speed Regulation Method Research Articles

Research on speed regulation method of high power magnetic gear

Magnetic gears have attracted the attention of many scholars due to their advantages of low noise, maintenance free, high torque density and inherent overload protection. In this paper, three speed regulation methods of high power magnetic gear transmission system are summarized and proposed, and the finite element analysis of the three speed regulation methods is carried out by COMSOL Multiphysics simulation software. The results show that when the sizes of the three magnetic gears are similar, the output torque and load power of the speed regulation method of the magnetic gear using the magnetic field modulated type is the largest. On the contrary, the axial magnetic gear with air gap length regulation method has the lowest output torque and load capacity. Compared with the other two methods, the coupling length regulation method has the minimum eddy current loss and the simple speed regulation structure, which is the most suitable for high power magnetic gear.

Speed Regulation Method Using Genetic Algorithm for Dual Three-phase Permanent Magnet Synchronous Motors

Dual three-phase Permanent Magnet Synchronous Motor (DTP-PMSM) is a nonlinear, strongly coupled, high-order multivariable system. In today's application scenarios, it is difficult for traditional PI controllers to meet the requirements of fast response, high accuracy and good robustness. In order to improve the performance of DTP-PMSM speed regulation system, a control strategy of PI controller based on genetic algorithm is proposed. Firstly, the basic mathematical model of DTP-PMSM is established, and the PI parameters of DTP-PMSM speed regulation system are optimized by genetic algorithm, and the modeling and simulation experiments of DTP-PMSM control system are carried out by MATLAB/SIMULINK. The simulation results show that, compared with the traditional PI control, the proposed algorithm significantly improves the performance of the control system, and the speed output overshoot of the GA-PI speed control system is smaller. The anti-interference ability is stronger, and the torque and double three-phase current output fluctuations are smaller.

The development of the motor and its speed regulation method

This paper first describes the types of motors and the corresponding speed regulation methods, and then introduces the motor speed regulation. PWM is regulated by PID, which regulate it from the beginning of the emergence of the parameters kp, ki, kd of the PID according to the empirical adjustment, to later development to adjust the parameters of the PID according to modern optimization algorithm. In this way, parameter control becomes accurate. Thus, the speed control of the motor is faster, which is of great significance for the application and development of the motor.

Electric Window Regulator Based on Intelligent Control

In order to effectively solve the problem of installation cost of automobile electric windows and the safety of passengers, the window regulator of the car must have an intelligent control function. For example, most automobile windows now have an anti-pinch function. In this paper, the model of DC brushed motor is analyzed, an intelligent control scheme for automotive power windows is proposed, and the relationship between current ripple and window travel, motor current and external resistance are verified. In the hardware design, S9S12G128 is the main control chip, and the motor current acquisition method is designed. In the software design, intelligent control methods such as current integration method, adaptive and self-learning algorithm and intelligent speed regulation method are proposed to realize functions such as automatic window opening and closing, intelligent anti-pinch and intelligent speed regulation. After many experiments, the results prove the feasibility of the above methods and the stability of the system.

Simulation research on pressure shock of load sensing system of large boom tower crane

Large boom tower cranes have large masses, heavy loads, and large inertial dynamic loads during the conversion of working conditions. Even if there is a buffer device, hydraulic shock will still occur. The problem of hydraulic shock seriously affects the leakage of hydraulic oil and decreases system reliability. Now the closed hydraulic system of a certain type of boom tower crane is taken as the research object, and the joint modeling of machinery and hydraulic is completed in AMESim. Without changing the basic hydraulic components, the hydraulic system of the whole machine just adjusts the ratio of the pulley block or changes the hydraulic speed regulation method to study the hydraulic shock of the servo-sensitive hydraulic system. AMESim simulation results show that in this load-sensitive system, the double-rate hoisting of the pulley block is compared with the single-rate hoisting of the pulley block, the maximum dynamic load generated by the load off the ground is increased by 5.4%; Speed regulation of the variable pump and variable motor combination is compared with the speed control of only variable motor, the maximum dynamic load of the hydraulic system is reduced by 7.6%.

Improving Reliability of Pumps in Parallel Pump Systems Using Particle Swam Optimization Approach

Parallel pump systems are widely used in industries. However, pumps are often operating under off-design conditions due to many reasons, which reduces the efficiency and reliability of the pumps. This paper aims at reducing the power consumption of parallel pump systems and improving the reliability of pumps by improving the operation points of pumps. To achieve this goal, a combination of selecting the proper number of pumps to put into operation and their speed is needed. Also, a control valve is adopted to further improve the operation points. The optimization model is built for a parallel pump system. Particle swarm optimization algorithm is used to solve the problem. Experimental verification shows that the proposed method improves the reliability and can also reduce power consumption for some cases compared to conventional PID speed regulation method. But for cases with large flow, extra power might be needed because the control valve introduces extra flow resistance in order to improve the operation point. The proposed method can be easily extended to applications based on their requirements on reliability.

Desain dan Implementasi Pengaturan Kecepatan Motor BLDC Melalui Pengaturan Fluks

This journal presents the design and implementation of BLDC motor speed control. Speed control of the BLDC motor can be done by controlling the flux produced by the BLDC motor coil. The current reading by the sensor will be processed in the flux estimator to get the flux value in the motor. By using the PI controller, the flux value generated by the coil will be controlled so that it is equal to the setpoint value that has been determined. Flux values that have the same setpoint will be converted to PWM values which will be used as input signals on the six step inverter. The test results by providing disturbance form the additional load on the motor, shows that the motor is able to maintain its speed according to the value of the speed provided. Thus, the proposed speed regulation method can work well.

Application of Variable Frequency Speed Regulation Technology in Fan System

With regard to the problem in fan air volume control, the research on air volume method was carried out, and the air volume control method for frequency conversion speed regulation was adopted. In this regard, a motor variable frequency speed regulation system was designed, and a variable frequency control software was developed. In order to verify the control effect of the system on the fan air volume, a measurement experiment on the fan speed was carried out, and it was concluded that the variable frequency speed regulation method was highly precised, and had a sound linearity. While finally, this variable frequency speed regulation system was applied in the fan system, and the equal thickness collection experiment on the material was carried out in order to ensure the strict control over the air volume, which has obtained a relatively sound application effect.

Research on speed regulation method of winding machine based on rectangular line mode

In the traditional semi-automatic winding machine winding process, the tension of the enameled copper wire changes greatly, and the cable is inaccurate, and cannot be separated from the manual machine. The emergence of automatic winding machine realizes the automation of winding production, reduces the labor intensity of winding, and greatly improves production efficiency. In order to improve the winding quality of the rectangular coil of the motor, a motor winding automatic winding machine is designed. The kinematics and dynamics analysis of the winding process of the winding machine were carried out. The kinematics of the enamelled copper wire and the working principle of the governing mechanism were studied. The kinematics mathematical model of the enamelled copper wire was simulated. The results show that the designed motor coil automatic winding machine has accurate cable routing and smooth winding process.

Precise Ultrasonic Motor Driver Design and Analysis

In this paper, it was put forward the reversing pulse width adjustment scheme. Precision DSP PWM technology is a good solution to the dead band protection problem, and the piezoelectric feedback link is a good solution to the problem of resonant point temperature drift. Experiments show that the reversing pulse width adjustment method is a good speed regulation method, the dynamic, wide speed range and good linearity governor.

An Ultrasonic Motor Precision Adjustable Speed Scheme Study and Analysis

In this paper, the traveling wave ultrasonic motor speed regulation method, such as voltage regulators, and phase modulation characteristics，are detailed studied. Comparing the advantages and disadvantages of each, the paper put forward the reversing pulse width adjustment scheme. Experiments show that the reversing pulse width adjustment method is a good speed regulation method, the dynamic, wide speed range and good linearity governor.

The Application of the Vector Control in Centrifuge

In order to ensure the stably operation for centrifuge, this paper presents a new speed regulation method based on the vector control technology, and designs the control system with the inverter for the centrifuge. The paper introduces the fundamental principal of vector control, and analyses the power and torque required for the centrifuge from the result of the calculation and simulation. At last, the paper shows the result the application of the vector control technology in centrifuge. The result shows that the vector control speed regulation system is simple, reliable, and its acceleration stability is very high. The analysis can also provide a reference for similar centrifuge design personnel

The research of power saving frequency conversion speed regulation experiment system

A power saving frequency difference controlling method was introduced by the double inverter and motor experiment system. The characters of the system under different loads were investigated. The theoretical analysis and experiment results show the frequency difference method is a ideal power saving speed regulation method for the double inverter and motor system. The experiment system is simply structured, convenient to operate and provides a new way of character testing for frequency conversion speed regulation.

Automatic selection of spindle speed for suppression of regenerative chatter in turning

The paper presents a new spindle speed regulation method to avoid regenerative chatter in turning operations. It is not necessary to analyse complex cutting dynamics to search for stable spindle speeds to eliminate regenerative chatter. The metal removal rate is also greatly improved by using this method. The stability lobe diagram for the stability limit of chip width and chatter frequency versus spindle speed is derived by using the Nyquist stability criterion. It is shown that stable spindle speeds can be automatically obtained when the chatter frequency is found. Computational simulations and experimental cutting tests are performed to illustrate the proposed method.

On-line drilling chatter recognition and avoidance using an ART2—A neural network

In the paper, an adaptive resonance theory (ART2-A) neural network is applied to on-line recognition and avoidance of drilling chatter. It is shown that the ART2-A neural network can adaptively learn the features of the thrust force spectrum in a drilling process. As a result, drilling chatter can be automatically detected when a chatter feature starts to appear in the thrust force spectrum. Once chatter is detected, a spindle speed regulation method to suppress chatter is used. Experiments show that this new developed system can monitor and suppress drilling chatter efficiently even under varying cutting conditions.