The Application of Microcontroller Timer/Counter in Speed Measuring/Speed Regulation System

2012 ◽  
Vol 490-495 ◽  
pp. 1541-1545
Author(s):  
Shi Sheng Jia ◽  
Bao Yin Li ◽  
Xue Hui Gao
Keyword(s):  
Pulse Width Modulation ◽  
Frequency Converter ◽  
Computer Control ◽  
Hall Sensor ◽  
Duty Ratio ◽  
Regulation System ◽  
Single Chip ◽  
Loop Control ◽  
Speed Regulation ◽  
Single Chip Computer

The system, a closed-loop control system which consists of single chip computer, control circuit, frequency converter and motor, can not only measure the motor’s speed, but also can set the motor’s speed conveniently and make the motor run at the set speed at last. There need to be three timers/counters to realize this function. As an enhanced 51 series microcontroller AT89S52, There are three such timers/counters (T0, T1, T2) in it. We can determine the motor’s speed with T2 by installing powerful magnet and Hall sensor on the motor’s axle. The Hall sensor generates a pulse when the motor’s axle turn a round. We can get the motor’s speed by calculating the cycle of the pulse. T1 and T2, as pulse width modulation signal generator, produce the pulse signals. Here T1 determines the cycle, and T0 determines the duty ratio. The duty ratio of pulse signals can be regulated according to the deviation between the real speed and set speed. Then the single chip computer generates corresponding DC voltage, which controls the frequency converter and makes the motor run at the set speed finally. The system can be applied to many field that has special requirements to motor’s speed.

A Speed Regulation System of DC Motor Based on PWM Technology

2010 ◽  
Vol 29-32 ◽  
pp. 2194-2199 ◽  
Author(s):  
Wen Cheng Wang
Keyword(s):  
Control System ◽  
Integrated Circuits ◽  
High Stability ◽  
Dc Motor ◽  
Hall Sensor ◽  
Regulation System ◽  
Operating Parameters ◽  
Motor Speed ◽  
Single Chip ◽  
Speed Regulation

The principles of PWM and Hall sensor have been introduced in this paper. To the defects of traditional methods, it proposed the designing strategy of DC motor speed control system based on single chip microcontroller with integrated circuits, and described the overall framework of the system. The system will generate PWM signals to control the motor accelerating, decelerating and turning, its operating parameters can be obtained through the measurement module and displayed on LCD. Experiment proved that the system has high stability, and it can meet the needs of DC motor speed regulation.

Design of Portable On-Board Charger

2012 ◽  
Vol 229-231 ◽  
pp. 837-840
Author(s):  
Deng Liang Cheng ◽  
Wei Rong Jiang ◽  
Jian Wei Mei
Keyword(s):  
Pulse Width ◽  
Parallel Machines ◽  
Pulse Width Modulation ◽  
Control Mode ◽  
Constant Current ◽  
System Control ◽  
Single Chip ◽  
Battery Charging ◽  
Loop Control ◽  
Bus Voltage

To solve the key technology of automotive lithium battery charging system, a new kind of smart portable on-board charger is developed. This battery charger takes single-chip machine of freescale as system control chip, realizes closed-loop control of bus voltage by the voltage pulse width modulation chip TL494, realizes charger output with constant voltage, constant current and switch without disturbances by the current pulse width modulation chip UC3846, achieves master-slave control mode for multi–parallel machines through the CAN bus technology. In addition, the microcontroller program realizes the process monitoring and fuzzy PID regulation, the charging process has multiple intelligent protection and external regulatory functions. The experimental results show that with dual regulations of the software and hardware, the charger has the advantages of stable reliability, flexible operation and precise intelligence, an effective exploration of the battery charging technology is carried out.

Research of Integrated Power Propulsion System Simulation Based on PSCAD

2014 ◽  
Vol 875-877 ◽  
pp. 1939-1943
Author(s):  
Hai Lan ◽  
Xin Zhao ◽  
Jie Meng
Keyword(s):  
Electric Propulsion ◽  
Frequency Converter ◽  
Propulsion System ◽  
Regulation System ◽  
Control Effect ◽  
Speed Regulation ◽  
Marine Propulsion ◽  
Fortran Language ◽  
Motor Load ◽  
The Stability

Modeling and simulation of generator, frequency converter, motor, propeller of integrated power system in PSCAD environment respectively, finally form a complete system, which contains the diesel engine and speed regulation system, generator and excitation system, motor and vector control system. Establish the propeller model as motor load by Fortran language. The motor load constantly changing, traditional PI controller parameters are not easily adjusted in real time, SNAPID controller based on the error changes in the changing, complete SNAPID controller in MATLAB environment and call MATLAB continually, the control effect of speed is improved in the process of marine propulsion. Finally simulate typical working condition of system, the simulation results show that propeller shaft torque is smaller when grading operating, the influence of electric propulsion system is smaller and conducive to maintaining the stability of the system.

Wheeled Mobile Robot Based on 51 Single Chip Computer Control System Design

2013 ◽  
Vol 846-847 ◽  
pp. 103-106
Author(s):  
Jun Han ◽  
Hui Jun Zhou
Keyword(s):  
Control System ◽  
Software Design ◽  
Robot Control ◽  
Computer Control ◽  
Control System Design ◽  
Single Chip ◽  
Computer Control System ◽  
Single Chip Microcomputer ◽  
Single Chip Computer ◽  
Microcomputer Control

Controller is the core of robot control system. This design uses a dual stc89c52rc single chip microcomputer control, which processes and responds very quickly,with the campaign, obstacle avoidance, automatic tracing function. This article describes the hardware and software design of control system.

Design of Dual-PWM VVVF System Based on ARM

2013 ◽  
Vol 756-759 ◽  
pp. 569-573
Author(s):  
Jian Wei Liang ◽  
Ling Liang ◽  
Shu Ren Han
Keyword(s):  
Control System ◽  
Vector Control ◽  
Control Strategies ◽  
Regulation System ◽  
Control Effect ◽  
Loop Control ◽  
Speed Regulation ◽  
Loop Control System ◽  
Infinite Loop ◽  
Cage Induction Motor

The article, three-phase squirrel cage induction motor as the research object, introduces the design of a new dual-PWM VVVF system based on ARM. The rectifier link design control strategies based on the power of the inner power loop and outer voltage square loop control system. The inverter link design a double infinite loop vector control speed regulation system of torque, flux linkage to the inner ring, rotational speed to the outer ring a double infinite loop vector control . And then, to combine rectifier link and inverter link to build dual-PWM VVVF system. Focuses on realization of the control system software and hardware-based LPC2132 and μ C/OS-II. Gives the hardware design of the overall program, as well as software realization based on the hardware μC/OS-IIoperating system . Introduce some of the specific features of the program as well as hardware and software anti-jamming technology . Conduct simulation verification to the dual-PWM VVVF system. The results show that: The dual-PWM control system can realize better control effect.

scholarly journals A novel hierarchical nonlinear proportional-integral fast terminal sliding mode control for PMSM drives

2021 ◽  
Vol 13 (4) ◽  
pp. 168781402110087
Author(s):  
Peng Gao ◽  
Guangming Zhang
Keyword(s):  
Control Strategy ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Regulation System ◽  
Terminal Sliding Mode ◽  
Loop Control ◽  
Proportional Integral ◽  
Speed Regulation ◽  
Fast Terminal Sliding Mode ◽  
Loop Control System

This study proposes a novel hierarchical nonlinear proportional-integral fast terminal sliding mode (HNLPIFTSM) control for permanent magnet synchronous motor (PMSM) speed regulation system. A new type of sliding surface called HNLPIFTSM surface, which combines the benefits of a nonlinear proportional-integral (PI) sliding mode surface and a fast terminal sliding mode (FTSM) surface, is proposed to enhance the robustness and improved the dynamic response, whilst preserving the great property of the conventional hierarchical fast terminal sliding mode (HFTSM) control strategy. The proposed HNLPIFTSM surface uses the novel nonlinear PI sliding mode surface as its inner loop and uses the FTSM surface as its outer loop. Meanwhile, an extended state observer (ESO) is used to estimate the uncertain terms of the PMSM speed regulation system. Furthermore, the stability of the closed-loop control system under the ESO and the HNLPIFTSM control strategy is proved by the Lyapunov stability theorem. Finally, the simulations and experimental demonstrations verify the effectiveness and superiorities of our proposed HNLPIFTSM control strategy over the conventional HFTSM control strategy.

SVPWM Vector Control Speed Regulation System of Asynchronous Motor Based on DSP

2013 ◽  
Vol 373-375 ◽  
pp. 1294-1298
Author(s):  
Jin Li
Keyword(s):  
Vector Control ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Asynchronous Motor ◽  
Torque Ripple ◽  
Low Noise ◽  
Regulation System ◽  
Motor Speed ◽  
Speed Regulation

Space vector pulse width modulation (SVPWM) is a method to control the AC asynchronous motor. SVPWM technology applied in AC speed regulation system can not only improve the shortcoming of low voltage utilization in the pulse-width modulation (PWM) technology, but have little torque ripple and low noise advantages. In this paper, a SVPWM vector control AC asynchronous motor speed regulation system employing a core TMS320LF2407A-type DSP chip was presented, and simulated the speed regulation system by MATLAB SIMULINK. The obtained simulation results indicate that the proposed speed regulation system has excellent dynamic and static performance, thus SVPWM control technology of asynchronous motor based on DSP has been implemented.

Research on a New Type of Flow Control System of Hydraulic Elevators With Car Speed Feedback

1999 ◽  
Author(s):  
Bing Xu ◽  
Huayong Yang
Keyword(s):  
Control System ◽  
Flow Control ◽  
Ride Comfort ◽  
Computer Control ◽  
Pulse Signal ◽  
Hydraulic Cylinder ◽  
Single Chip ◽  
Soft Start ◽  
Single Chip Computer ◽  
Flow Control System

Abstract This paper introduces an innovation design of flow control system for hydraulic elevators with car speed feedback. By measuring pulse signal emitted by photoelectric encoder mounted on the elevator car, a single-chip computer controls the electrohydraulic proportional integrated flow valve, then drives the elevator car by a hydraulic cylinder. With this set of single-chip computer control system, good speed performance of the elevator can be achieved. Furthermore, it has strong robustness against the disturbance of oil temperature variation, mechanical friction and other disturbance factors. In order to obtain better ride comfort and soft start of the elevator, PID control algorithm is also proposed. Some mathematical models both for static and dynamic states have been established, consequently simulation results are found to be in close agreement with the experimental results.

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